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drm/rockchip: Don't change hdmi reference clock rate
[drm/drm-misc.git] / drivers / net / wireless / intel / iwlegacy / common.c
blob958dd4f9bc69201ba477e46d2e749871daddde28
1 // SPDX-License-Identifier: GPL-2.0-only
2 /******************************************************************************
3 *
4 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
5 *
6 * Contact Information:
7 * Intel Linux Wireless <ilw@linux.intel.com>
8 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
9 *****************************************************************************/
10
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/etherdevice.h>
14 #include <linux/sched.h>
15 #include <linux/slab.h>
16 #include <linux/types.h>
17 #include <linux/lockdep.h>
18 #include <linux/pci.h>
19 #include <linux/dma-mapping.h>
20 #include <linux/delay.h>
21 #include <linux/skbuff.h>
22 #include <net/mac80211.h>
23
24 #include "common.h"
25
26 int
27 _il_poll_bit(struct il_priv *il, u32 addr, u32 bits, u32 mask, int timeout)
28 {
29 const int interval = 10; /* microseconds */
30 int t = 0;
31
32 do {
33 if ((_il_rd(il, addr) & mask) == (bits & mask))
34 return t;
35 udelay(interval);
36 t += interval;
37 } while (t < timeout);
38
39 return -ETIMEDOUT;
40 }
41 EXPORT_SYMBOL(_il_poll_bit);
42
43 void
44 il_set_bit(struct il_priv *p, u32 r, u32 m)
45 {
46 unsigned long reg_flags;
47
48 spin_lock_irqsave(&p->reg_lock, reg_flags);
49 _il_set_bit(p, r, m);
50 spin_unlock_irqrestore(&p->reg_lock, reg_flags);
51 }
52 EXPORT_SYMBOL(il_set_bit);
53
54 void
55 il_clear_bit(struct il_priv *p, u32 r, u32 m)
56 {
57 unsigned long reg_flags;
58
59 spin_lock_irqsave(&p->reg_lock, reg_flags);
60 _il_clear_bit(p, r, m);
61 spin_unlock_irqrestore(&p->reg_lock, reg_flags);
62 }
63 EXPORT_SYMBOL(il_clear_bit);
64
65 bool
66 _il_grab_nic_access(struct il_priv *il)
67 {
68 int ret;
69 u32 val;
70
71 /* this bit wakes up the NIC */
72 _il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
73
74 /*
75 * These bits say the device is running, and should keep running for
76 * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
77 * but they do not indicate that embedded SRAM is restored yet;
78 * 3945 and 4965 have volatile SRAM, and must save/restore contents
79 * to/from host DRAM when sleeping/waking for power-saving.
80 * Each direction takes approximately 1/4 millisecond; with this
81 * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
82 * series of register accesses are expected (e.g. reading Event Log),
83 * to keep device from sleeping.
84 *
85 * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
86 * SRAM is okay/restored. We don't check that here because this call
87 * is just for hardware register access; but GP1 MAC_SLEEP check is a
88 * good idea before accessing 3945/4965 SRAM (e.g. reading Event Log).
89 *
90 */
91 ret =
92 _il_poll_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
93 (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
94 CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
95 if (unlikely(ret < 0)) {
96 val = _il_rd(il, CSR_GP_CNTRL);
97 WARN_ONCE(1, "Timeout waiting for ucode processor access "
98 "(CSR_GP_CNTRL 0x%08x)\n", val);
99 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
100 return false;
101 }
102
103 return true;
104 }
105 EXPORT_SYMBOL_GPL(_il_grab_nic_access);
106
107 int
108 il_poll_bit(struct il_priv *il, u32 addr, u32 mask, int timeout)
109 {
110 const int interval = 10; /* microseconds */
111 int t = 0;
112
113 do {
114 if ((il_rd(il, addr) & mask) == mask)
115 return t;
116 udelay(interval);
117 t += interval;
118 } while (t < timeout);
119
120 return -ETIMEDOUT;
121 }
122 EXPORT_SYMBOL(il_poll_bit);
123
124 u32
125 il_rd_prph(struct il_priv *il, u32 reg)
126 {
127 unsigned long reg_flags;
128 u32 val;
129
130 spin_lock_irqsave(&il->reg_lock, reg_flags);
131 _il_grab_nic_access(il);
132 val = _il_rd_prph(il, reg);
133 _il_release_nic_access(il);
134 spin_unlock_irqrestore(&il->reg_lock, reg_flags);
135 return val;
136 }
137 EXPORT_SYMBOL(il_rd_prph);
138
139 void
140 il_wr_prph(struct il_priv *il, u32 addr, u32 val)
141 {
142 unsigned long reg_flags;
143
144 spin_lock_irqsave(&il->reg_lock, reg_flags);
145 if (likely(_il_grab_nic_access(il))) {
146 _il_wr_prph(il, addr, val);
147 _il_release_nic_access(il);
148 }
149 spin_unlock_irqrestore(&il->reg_lock, reg_flags);
150 }
151 EXPORT_SYMBOL(il_wr_prph);
152
153 u32
154 il_read_targ_mem(struct il_priv *il, u32 addr)
155 {
156 unsigned long reg_flags;
157 u32 value;
158
159 spin_lock_irqsave(&il->reg_lock, reg_flags);
160 _il_grab_nic_access(il);
161
162 _il_wr(il, HBUS_TARG_MEM_RADDR, addr);
163 value = _il_rd(il, HBUS_TARG_MEM_RDAT);
164
165 _il_release_nic_access(il);
166 spin_unlock_irqrestore(&il->reg_lock, reg_flags);
167 return value;
168 }
169 EXPORT_SYMBOL(il_read_targ_mem);
170
171 void
172 il_write_targ_mem(struct il_priv *il, u32 addr, u32 val)
173 {
174 unsigned long reg_flags;
175
176 spin_lock_irqsave(&il->reg_lock, reg_flags);
177 if (likely(_il_grab_nic_access(il))) {
178 _il_wr(il, HBUS_TARG_MEM_WADDR, addr);
179 _il_wr(il, HBUS_TARG_MEM_WDAT, val);
180 _il_release_nic_access(il);
181 }
182 spin_unlock_irqrestore(&il->reg_lock, reg_flags);
183 }
184 EXPORT_SYMBOL(il_write_targ_mem);
185
186 const char *
187 il_get_cmd_string(u8 cmd)
188 {
189 switch (cmd) {
190 IL_CMD(N_ALIVE);
191 IL_CMD(N_ERROR);
192 IL_CMD(C_RXON);
193 IL_CMD(C_RXON_ASSOC);
194 IL_CMD(C_QOS_PARAM);
195 IL_CMD(C_RXON_TIMING);
196 IL_CMD(C_ADD_STA);
197 IL_CMD(C_REM_STA);
198 IL_CMD(C_WEPKEY);
199 IL_CMD(N_3945_RX);
200 IL_CMD(C_TX);
201 IL_CMD(C_RATE_SCALE);
202 IL_CMD(C_LEDS);
203 IL_CMD(C_TX_LINK_QUALITY_CMD);
204 IL_CMD(C_CHANNEL_SWITCH);
205 IL_CMD(N_CHANNEL_SWITCH);
206 IL_CMD(C_SPECTRUM_MEASUREMENT);
207 IL_CMD(N_SPECTRUM_MEASUREMENT);
208 IL_CMD(C_POWER_TBL);
209 IL_CMD(N_PM_SLEEP);
210 IL_CMD(N_PM_DEBUG_STATS);
211 IL_CMD(C_SCAN);
212 IL_CMD(C_SCAN_ABORT);
213 IL_CMD(N_SCAN_START);
214 IL_CMD(N_SCAN_RESULTS);
215 IL_CMD(N_SCAN_COMPLETE);
216 IL_CMD(N_BEACON);
217 IL_CMD(C_TX_BEACON);
218 IL_CMD(C_TX_PWR_TBL);
219 IL_CMD(C_BT_CONFIG);
220 IL_CMD(C_STATS);
221 IL_CMD(N_STATS);
222 IL_CMD(N_CARD_STATE);
223 IL_CMD(N_MISSED_BEACONS);
224 IL_CMD(C_CT_KILL_CONFIG);
225 IL_CMD(C_SENSITIVITY);
226 IL_CMD(C_PHY_CALIBRATION);
227 IL_CMD(N_RX_PHY);
228 IL_CMD(N_RX_MPDU);
229 IL_CMD(N_RX);
230 IL_CMD(N_COMPRESSED_BA);
231 default:
232 return "UNKNOWN";
233
234 }
235 }
236 EXPORT_SYMBOL(il_get_cmd_string);
237
238 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
239
240 static void
241 il_generic_cmd_callback(struct il_priv *il, struct il_device_cmd *cmd,
242 struct il_rx_pkt *pkt)
243 {
244 if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
245 IL_ERR("Bad return from %s (0x%08X)\n",
246 il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
247 return;
248 }
249 #ifdef CONFIG_IWLEGACY_DEBUG
250 switch (cmd->hdr.cmd) {
251 case C_TX_LINK_QUALITY_CMD:
252 case C_SENSITIVITY:
253 D_HC_DUMP("back from %s (0x%08X)\n",
254 il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
255 break;
256 default:
257 D_HC("back from %s (0x%08X)\n", il_get_cmd_string(cmd->hdr.cmd),
258 pkt->hdr.flags);
259 }
260 #endif
261 }
262
263 static int
264 il_send_cmd_async(struct il_priv *il, struct il_host_cmd *cmd)
265 {
266 int ret;
267
268 BUG_ON(!(cmd->flags & CMD_ASYNC));
269
270 /* An asynchronous command can not expect an SKB to be set. */
271 BUG_ON(cmd->flags & CMD_WANT_SKB);
272
273 /* Assign a generic callback if one is not provided */
274 if (!cmd->callback)
275 cmd->callback = il_generic_cmd_callback;
276
277 if (test_bit(S_EXIT_PENDING, &il->status))
278 return -EBUSY;
279
280 ret = il_enqueue_hcmd(il, cmd);
281 if (ret < 0) {
282 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
283 il_get_cmd_string(cmd->id), ret);
284 return ret;
285 }
286 return 0;
287 }
288
289 int
290 il_send_cmd_sync(struct il_priv *il, struct il_host_cmd *cmd)
291 {
292 int cmd_idx;
293 int ret;
294
295 lockdep_assert_held(&il->mutex);
296
297 BUG_ON(cmd->flags & CMD_ASYNC);
298
299 /* A synchronous command can not have a callback set. */
300 BUG_ON(cmd->callback);
301
302 D_INFO("Attempting to send sync command %s\n",
303 il_get_cmd_string(cmd->id));
304
305 set_bit(S_HCMD_ACTIVE, &il->status);
306 D_INFO("Setting HCMD_ACTIVE for command %s\n",
307 il_get_cmd_string(cmd->id));
308
309 cmd_idx = il_enqueue_hcmd(il, cmd);
310 if (cmd_idx < 0) {
311 ret = cmd_idx;
312 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
313 il_get_cmd_string(cmd->id), ret);
314 goto out;
315 }
316
317 ret = wait_event_timeout(il->wait_command_queue,
318 !test_bit(S_HCMD_ACTIVE, &il->status),
319 HOST_COMPLETE_TIMEOUT);
320 if (!ret) {
321 if (test_bit(S_HCMD_ACTIVE, &il->status)) {
322 IL_ERR("Error sending %s: time out after %dms.\n",
323 il_get_cmd_string(cmd->id),
324 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
325
326 clear_bit(S_HCMD_ACTIVE, &il->status);
327 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
328 il_get_cmd_string(cmd->id));
329 ret = -ETIMEDOUT;
330 goto cancel;
331 }
332 }
333
334 if (test_bit(S_RFKILL, &il->status)) {
335 IL_ERR("Command %s aborted: RF KILL Switch\n",
336 il_get_cmd_string(cmd->id));
337 ret = -ECANCELED;
338 goto fail;
339 }
340 if (test_bit(S_FW_ERROR, &il->status)) {
341 IL_ERR("Command %s failed: FW Error\n",
342 il_get_cmd_string(cmd->id));
343 ret = -EIO;
344 goto fail;
345 }
346 if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
347 IL_ERR("Error: Response NULL in '%s'\n",
348 il_get_cmd_string(cmd->id));
349 ret = -EIO;
350 goto cancel;
351 }
352
353 ret = 0;
354 goto out;
355
356 cancel:
357 if (cmd->flags & CMD_WANT_SKB) {
358 /*
359 * Cancel the CMD_WANT_SKB flag for the cmd in the
360 * TX cmd queue. Otherwise in case the cmd comes
361 * in later, it will possibly set an invalid
362 * address (cmd->meta.source).
363 */
364 il->txq[il->cmd_queue].meta[cmd_idx].flags &= ~CMD_WANT_SKB;
365 }
366 fail:
367 if (cmd->reply_page) {
368 il_free_pages(il, cmd->reply_page);
369 cmd->reply_page = 0;
370 }
371 out:
372 return ret;
373 }
374 EXPORT_SYMBOL(il_send_cmd_sync);
375
376 int
377 il_send_cmd(struct il_priv *il, struct il_host_cmd *cmd)
378 {
379 if (cmd->flags & CMD_ASYNC)
380 return il_send_cmd_async(il, cmd);
381
382 return il_send_cmd_sync(il, cmd);
383 }
384 EXPORT_SYMBOL(il_send_cmd);
385
386 int
387 il_send_cmd_pdu(struct il_priv *il, u8 id, u16 len, const void *data)
388 {
389 struct il_host_cmd cmd = {
390 .id = id,
391 .len = len,
392 .data = data,
393 };
394
395 return il_send_cmd_sync(il, &cmd);
396 }
397 EXPORT_SYMBOL(il_send_cmd_pdu);
398
399 int
400 il_send_cmd_pdu_async(struct il_priv *il, u8 id, u16 len, const void *data,
401 void (*callback) (struct il_priv *il,
402 struct il_device_cmd *cmd,
403 struct il_rx_pkt *pkt))
404 {
405 struct il_host_cmd cmd = {
406 .id = id,
407 .len = len,
408 .data = data,
409 };
410
411 cmd.flags |= CMD_ASYNC;
412 cmd.callback = callback;
413
414 return il_send_cmd_async(il, &cmd);
415 }
416 EXPORT_SYMBOL(il_send_cmd_pdu_async);
417
418 /* default: IL_LED_BLINK(0) using blinking idx table */
419 static int led_mode;
420 module_param(led_mode, int, 0444);
421 MODULE_PARM_DESC(led_mode,
422 "0=system default, " "1=On(RF On)/Off(RF Off), 2=blinking");
423
424 /* Throughput OFF time(ms) ON time (ms)
425 * >300 25 25
426 * >200 to 300 40 40
427 * >100 to 200 55 55
428 * >70 to 100 65 65
429 * >50 to 70 75 75
430 * >20 to 50 85 85
431 * >10 to 20 95 95
432 * >5 to 10 110 110
433 * >1 to 5 130 130
434 * >0 to 1 167 167
435 * <=0 SOLID ON
436 */
437 static const struct ieee80211_tpt_blink il_blink[] = {
438 {.throughput = 0, .blink_time = 334},
439 {.throughput = 1 * 1024 - 1, .blink_time = 260},
440 {.throughput = 5 * 1024 - 1, .blink_time = 220},
441 {.throughput = 10 * 1024 - 1, .blink_time = 190},
442 {.throughput = 20 * 1024 - 1, .blink_time = 170},
443 {.throughput = 50 * 1024 - 1, .blink_time = 150},
444 {.throughput = 70 * 1024 - 1, .blink_time = 130},
445 {.throughput = 100 * 1024 - 1, .blink_time = 110},
446 {.throughput = 200 * 1024 - 1, .blink_time = 80},
447 {.throughput = 300 * 1024 - 1, .blink_time = 50},
448 };
449
450 /*
451 * Adjust led blink rate to compensate on a MAC Clock difference on every HW
452 * Led blink rate analysis showed an average deviation of 0% on 3945,
453 * 5% on 4965 HW.
454 * Need to compensate on the led on/off time per HW according to the deviation
455 * to achieve the desired led frequency
456 * The calculation is: (100-averageDeviation)/100 * blinkTime
457 * For code efficiency the calculation will be:
458 * compensation = (100 - averageDeviation) * 64 / 100
459 * NewBlinkTime = (compensation * BlinkTime) / 64
460 */
461 static inline u8
462 il_blink_compensation(struct il_priv *il, u8 time, u16 compensation)
463 {
464 if (!compensation) {
465 IL_ERR("undefined blink compensation: "
466 "use pre-defined blinking time\n");
467 return time;
468 }
469
470 return (u8) ((time * compensation) >> 6);
471 }
472
473 /* Set led pattern command */
474 static int
475 il_led_cmd(struct il_priv *il, unsigned long on, unsigned long off)
476 {
477 struct il_led_cmd led_cmd = {
478 .id = IL_LED_LINK,
479 .interval = IL_DEF_LED_INTRVL
480 };
481 int ret;
482
483 if (!test_bit(S_READY, &il->status))
484 return -EBUSY;
485
486 if (il->blink_on == on && il->blink_off == off)
487 return 0;
488
489 if (off == 0) {
490 /* led is SOLID_ON */
491 on = IL_LED_SOLID;
492 }
493
494 D_LED("Led blink time compensation=%u\n",
495 il->cfg->led_compensation);
496 led_cmd.on =
497 il_blink_compensation(il, on,
498 il->cfg->led_compensation);
499 led_cmd.off =
500 il_blink_compensation(il, off,
501 il->cfg->led_compensation);
502
503 ret = il->ops->send_led_cmd(il, &led_cmd);
504 if (!ret) {
505 il->blink_on = on;
506 il->blink_off = off;
507 }
508 return ret;
509 }
510
511 static void
512 il_led_brightness_set(struct led_classdev *led_cdev,
513 enum led_brightness brightness)
514 {
515 struct il_priv *il = container_of(led_cdev, struct il_priv, led);
516 unsigned long on = 0;
517
518 if (brightness > 0)
519 on = IL_LED_SOLID;
520
521 il_led_cmd(il, on, 0);
522 }
523
524 static int
525 il_led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on,
526 unsigned long *delay_off)
527 {
528 struct il_priv *il = container_of(led_cdev, struct il_priv, led);
529
530 return il_led_cmd(il, *delay_on, *delay_off);
531 }
532
533 void
534 il_leds_init(struct il_priv *il)
535 {
536 int mode = led_mode;
537 int ret;
538
539 if (mode == IL_LED_DEFAULT)
540 mode = il->cfg->led_mode;
541
542 il->led.name =
543 kasprintf(GFP_KERNEL, "%s-led", wiphy_name(il->hw->wiphy));
544 if (!il->led.name)
545 return;
546
547 il->led.brightness_set = il_led_brightness_set;
548 il->led.blink_set = il_led_blink_set;
549 il->led.max_brightness = 1;
550
551 switch (mode) {
552 case IL_LED_DEFAULT:
553 WARN_ON(1);
554 break;
555 case IL_LED_BLINK:
556 il->led.default_trigger =
557 ieee80211_create_tpt_led_trigger(il->hw,
558 IEEE80211_TPT_LEDTRIG_FL_CONNECTED,
559 il_blink,
560 ARRAY_SIZE(il_blink));
561 break;
562 case IL_LED_RF_STATE:
563 il->led.default_trigger = ieee80211_get_radio_led_name(il->hw);
564 break;
565 }
566
567 ret = led_classdev_register(&il->pci_dev->dev, &il->led);
568 if (ret) {
569 kfree(il->led.name);
570 return;
571 }
572
573 il->led_registered = true;
574 }
575 EXPORT_SYMBOL(il_leds_init);
576
577 void
578 il_leds_exit(struct il_priv *il)
579 {
580 if (!il->led_registered)
581 return;
582
583 led_classdev_unregister(&il->led);
584 kfree(il->led.name);
585 }
586 EXPORT_SYMBOL(il_leds_exit);
587
588 /************************** EEPROM BANDS ****************************
589 *
590 * The il_eeprom_band definitions below provide the mapping from the
591 * EEPROM contents to the specific channel number supported for each
592 * band.
593 *
594 * For example, il_priv->eeprom.band_3_channels[4] from the band_3
595 * definition below maps to physical channel 42 in the 5.2GHz spectrum.
596 * The specific geography and calibration information for that channel
597 * is contained in the eeprom map itself.
598 *
599 * During init, we copy the eeprom information and channel map
600 * information into il->channel_info_24/52 and il->channel_map_24/52
601 *
602 * channel_map_24/52 provides the idx in the channel_info array for a
603 * given channel. We have to have two separate maps as there is channel
604 * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
605 * band_2
606 *
607 * A value of 0xff stored in the channel_map indicates that the channel
608 * is not supported by the hardware at all.
609 *
610 * A value of 0xfe in the channel_map indicates that the channel is not
611 * valid for Tx with the current hardware. This means that
612 * while the system can tune and receive on a given channel, it may not
613 * be able to associate or transmit any frames on that
614 * channel. There is no corresponding channel information for that
615 * entry.
616 *
617 *********************************************************************/
618
619 /* 2.4 GHz */
620 const u8 il_eeprom_band_1[14] = {
621 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
622 };
623
624 /* 5.2 GHz bands */
625 static const u8 il_eeprom_band_2[] = { /* 4915-5080MHz */
626 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
627 };
628
629 static const u8 il_eeprom_band_3[] = { /* 5170-5320MHz */
630 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
631 };
632
633 static const u8 il_eeprom_band_4[] = { /* 5500-5700MHz */
634 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
635 };
636
637 static const u8 il_eeprom_band_5[] = { /* 5725-5825MHz */
638 145, 149, 153, 157, 161, 165
639 };
640
641 static const u8 il_eeprom_band_6[] = { /* 2.4 ht40 channel */
642 1, 2, 3, 4, 5, 6, 7
643 };
644
645 static const u8 il_eeprom_band_7[] = { /* 5.2 ht40 channel */
646 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
647 };
648
649 /******************************************************************************
650 *
651 * EEPROM related functions
652 *
653 ******************************************************************************/
654
655 static int
656 il_eeprom_verify_signature(struct il_priv *il)
657 {
658 u32 gp = _il_rd(il, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;
659 int ret = 0;
660
661 D_EEPROM("EEPROM signature=0x%08x\n", gp);
662 switch (gp) {
663 case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K:
664 case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K:
665 break;
666 default:
667 IL_ERR("bad EEPROM signature," "EEPROM_GP=0x%08x\n", gp);
668 ret = -ENOENT;
669 break;
670 }
671 return ret;
672 }
673
674 const u8 *
675 il_eeprom_query_addr(const struct il_priv *il, size_t offset)
676 {
677 BUG_ON(offset >= il->cfg->eeprom_size);
678 return &il->eeprom[offset];
679 }
680 EXPORT_SYMBOL(il_eeprom_query_addr);
681
682 u16
683 il_eeprom_query16(const struct il_priv *il, size_t offset)
684 {
685 if (!il->eeprom)
686 return 0;
687 return (u16) il->eeprom[offset] | ((u16) il->eeprom[offset + 1] << 8);
688 }
689 EXPORT_SYMBOL(il_eeprom_query16);
690
691 /*
692 * il_eeprom_init - read EEPROM contents
693 *
694 * Load the EEPROM contents from adapter into il->eeprom
695 *
696 * NOTE: This routine uses the non-debug IO access functions.
697 */
698 int
699 il_eeprom_init(struct il_priv *il)
700 {
701 __le16 *e;
702 u32 gp = _il_rd(il, CSR_EEPROM_GP);
703 int sz;
704 int ret;
705 int addr;
706
707 /* allocate eeprom */
708 sz = il->cfg->eeprom_size;
709 D_EEPROM("NVM size = %d\n", sz);
710 il->eeprom = kzalloc(sz, GFP_KERNEL);
711 if (!il->eeprom)
712 return -ENOMEM;
713
714 e = (__le16 *) il->eeprom;
715
716 il->ops->apm_init(il);
717
718 ret = il_eeprom_verify_signature(il);
719 if (ret < 0) {
720 IL_ERR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
721 ret = -ENOENT;
722 goto err;
723 }
724
725 /* Make sure driver (instead of uCode) is allowed to read EEPROM */
726 ret = il->ops->eeprom_acquire_semaphore(il);
727 if (ret < 0) {
728 IL_ERR("Failed to acquire EEPROM semaphore.\n");
729 ret = -ENOENT;
730 goto err;
731 }
732
733 /* eeprom is an array of 16bit values */
734 for (addr = 0; addr < sz; addr += sizeof(u16)) {
735 u32 r;
736
737 _il_wr(il, CSR_EEPROM_REG,
738 CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
739
740 ret =
741 _il_poll_bit(il, CSR_EEPROM_REG,
742 CSR_EEPROM_REG_READ_VALID_MSK,
743 CSR_EEPROM_REG_READ_VALID_MSK,
744 IL_EEPROM_ACCESS_TIMEOUT);
745 if (ret < 0) {
746 IL_ERR("Time out reading EEPROM[%d]\n", addr);
747 goto done;
748 }
749 r = _il_rd(il, CSR_EEPROM_REG);
750 e[addr / 2] = cpu_to_le16(r >> 16);
751 }
752
753 D_EEPROM("NVM Type: %s, version: 0x%x\n", "EEPROM",
754 il_eeprom_query16(il, EEPROM_VERSION));
755
756 ret = 0;
757 done:
758 il->ops->eeprom_release_semaphore(il);
759
760 err:
761 if (ret)
762 il_eeprom_free(il);
763 /* Reset chip to save power until we load uCode during "up". */
764 il_apm_stop(il);
765 return ret;
766 }
767 EXPORT_SYMBOL(il_eeprom_init);
768
769 void
770 il_eeprom_free(struct il_priv *il)
771 {
772 kfree(il->eeprom);
773 il->eeprom = NULL;
774 }
775 EXPORT_SYMBOL(il_eeprom_free);
776
777 static void
778 il_init_band_reference(const struct il_priv *il, int eep_band,
779 int *eeprom_ch_count,
780 const struct il_eeprom_channel **eeprom_ch_info,
781 const u8 **eeprom_ch_idx)
782 {
783 u32 offset = il->cfg->regulatory_bands[eep_band - 1];
784
785 switch (eep_band) {
786 case 1: /* 2.4GHz band */
787 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_1);
788 *eeprom_ch_info =
789 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
790 offset);
791 *eeprom_ch_idx = il_eeprom_band_1;
792 break;
793 case 2: /* 4.9GHz band */
794 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_2);
795 *eeprom_ch_info =
796 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
797 offset);
798 *eeprom_ch_idx = il_eeprom_band_2;
799 break;
800 case 3: /* 5.2GHz band */
801 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_3);
802 *eeprom_ch_info =
803 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
804 offset);
805 *eeprom_ch_idx = il_eeprom_band_3;
806 break;
807 case 4: /* 5.5GHz band */
808 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_4);
809 *eeprom_ch_info =
810 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
811 offset);
812 *eeprom_ch_idx = il_eeprom_band_4;
813 break;
814 case 5: /* 5.7GHz band */
815 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_5);
816 *eeprom_ch_info =
817 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
818 offset);
819 *eeprom_ch_idx = il_eeprom_band_5;
820 break;
821 case 6: /* 2.4GHz ht40 channels */
822 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_6);
823 *eeprom_ch_info =
824 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
825 offset);
826 *eeprom_ch_idx = il_eeprom_band_6;
827 break;
828 case 7: /* 5 GHz ht40 channels */
829 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_7);
830 *eeprom_ch_info =
831 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
832 offset);
833 *eeprom_ch_idx = il_eeprom_band_7;
834 break;
835 default:
836 BUG();
837 }
838 }
839
840 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
841 ? # x " " : "")
842 /*
843 * il_mod_ht40_chan_info - Copy ht40 channel info into driver's il.
844 *
845 * Does not set up a command, or touch hardware.
846 */
847 static int
848 il_mod_ht40_chan_info(struct il_priv *il, enum nl80211_band band, u16 channel,
849 const struct il_eeprom_channel *eeprom_ch,
850 u8 clear_ht40_extension_channel)
851 {
852 struct il_channel_info *ch_info;
853
854 ch_info =
855 (struct il_channel_info *)il_get_channel_info(il, band, channel);
856
857 if (!il_is_channel_valid(ch_info))
858 return -1;
859
860 D_EEPROM("HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
861 " Ad-Hoc %ssupported\n", ch_info->channel,
862 il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
863 CHECK_AND_PRINT(IBSS), CHECK_AND_PRINT(ACTIVE),
864 CHECK_AND_PRINT(RADAR), CHECK_AND_PRINT(WIDE),
865 CHECK_AND_PRINT(DFS), eeprom_ch->flags,
866 eeprom_ch->max_power_avg,
867 ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS) &&
868 !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ? "" : "not ");
869
870 ch_info->ht40_eeprom = *eeprom_ch;
871 ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg;
872 ch_info->ht40_flags = eeprom_ch->flags;
873 if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
874 ch_info->ht40_extension_channel &=
875 ~clear_ht40_extension_channel;
876
877 return 0;
878 }
879
880 #define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
881 ? # x " " : "")
882
883 /*
884 * il_init_channel_map - Set up driver's info for all possible channels
885 */
886 int
887 il_init_channel_map(struct il_priv *il)
888 {
889 int eeprom_ch_count = 0;
890 const u8 *eeprom_ch_idx = NULL;
891 const struct il_eeprom_channel *eeprom_ch_info = NULL;
892 int band, ch;
893 struct il_channel_info *ch_info;
894
895 if (il->channel_count) {
896 D_EEPROM("Channel map already initialized.\n");
897 return 0;
898 }
899
900 D_EEPROM("Initializing regulatory info from EEPROM\n");
901
902 il->channel_count =
903 ARRAY_SIZE(il_eeprom_band_1) + ARRAY_SIZE(il_eeprom_band_2) +
904 ARRAY_SIZE(il_eeprom_band_3) + ARRAY_SIZE(il_eeprom_band_4) +
905 ARRAY_SIZE(il_eeprom_band_5);
906
907 D_EEPROM("Parsing data for %d channels.\n", il->channel_count);
908
909 il->channel_info =
910 kcalloc(il->channel_count, sizeof(struct il_channel_info),
911 GFP_KERNEL);
912 if (!il->channel_info) {
913 IL_ERR("Could not allocate channel_info\n");
914 il->channel_count = 0;
915 return -ENOMEM;
916 }
917
918 ch_info = il->channel_info;
919
920 /* Loop through the 5 EEPROM bands adding them in order to the
921 * channel map we maintain (that contains additional information than
922 * what just in the EEPROM) */
923 for (band = 1; band <= 5; band++) {
924
925 il_init_band_reference(il, band, &eeprom_ch_count,
926 &eeprom_ch_info, &eeprom_ch_idx);
927
928 /* Loop through each band adding each of the channels */
929 for (ch = 0; ch < eeprom_ch_count; ch++) {
930 ch_info->channel = eeprom_ch_idx[ch];
931 ch_info->band =
932 (band ==
933 1) ? NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
934
935 /* permanently store EEPROM's channel regulatory flags
936 * and max power in channel info database. */
937 ch_info->eeprom = eeprom_ch_info[ch];
938
939 /* Copy the run-time flags so they are there even on
940 * invalid channels */
941 ch_info->flags = eeprom_ch_info[ch].flags;
942 /* First write that ht40 is not enabled, and then enable
943 * one by one */
944 ch_info->ht40_extension_channel =
945 IEEE80211_CHAN_NO_HT40;
946
947 if (!(il_is_channel_valid(ch_info))) {
948 D_EEPROM("Ch. %d Flags %x [%sGHz] - "
949 "No traffic\n", ch_info->channel,
950 ch_info->flags,
951 il_is_channel_a_band(ch_info) ? "5.2" :
952 "2.4");
953 ch_info++;
954 continue;
955 }
956
957 /* Initialize regulatory-based run-time data */
958 ch_info->max_power_avg = ch_info->curr_txpow =
959 eeprom_ch_info[ch].max_power_avg;
960 ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
961 ch_info->min_power = 0;
962
963 D_EEPROM("Ch. %d [%sGHz] " "%s%s%s%s%s%s(0x%02x %ddBm):"
964 " Ad-Hoc %ssupported\n", ch_info->channel,
965 il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
966 CHECK_AND_PRINT_I(VALID),
967 CHECK_AND_PRINT_I(IBSS),
968 CHECK_AND_PRINT_I(ACTIVE),
969 CHECK_AND_PRINT_I(RADAR),
970 CHECK_AND_PRINT_I(WIDE),
971 CHECK_AND_PRINT_I(DFS),
972 eeprom_ch_info[ch].flags,
973 eeprom_ch_info[ch].max_power_avg,
974 ((eeprom_ch_info[ch].
975 flags & EEPROM_CHANNEL_IBSS) &&
976 !(eeprom_ch_info[ch].
977 flags & EEPROM_CHANNEL_RADAR)) ? "" :
978 "not ");
979
980 ch_info++;
981 }
982 }
983
984 /* Check if we do have HT40 channels */
985 if (il->cfg->regulatory_bands[5] == EEPROM_REGULATORY_BAND_NO_HT40 &&
986 il->cfg->regulatory_bands[6] == EEPROM_REGULATORY_BAND_NO_HT40)
987 return 0;
988
989 /* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
990 for (band = 6; band <= 7; band++) {
991 enum nl80211_band ieeeband;
992
993 il_init_band_reference(il, band, &eeprom_ch_count,
994 &eeprom_ch_info, &eeprom_ch_idx);
995
996 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
997 ieeeband =
998 (band == 6) ? NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
999
1000 /* Loop through each band adding each of the channels */
1001 for (ch = 0; ch < eeprom_ch_count; ch++) {
1002 /* Set up driver's info for lower half */
1003 il_mod_ht40_chan_info(il, ieeeband, eeprom_ch_idx[ch],
1004 &eeprom_ch_info[ch],
1005 IEEE80211_CHAN_NO_HT40PLUS);
1006
1007 /* Set up driver's info for upper half */
1008 il_mod_ht40_chan_info(il, ieeeband,
1009 eeprom_ch_idx[ch] + 4,
1010 &eeprom_ch_info[ch],
1011 IEEE80211_CHAN_NO_HT40MINUS);
1012 }
1013 }
1014
1015 return 0;
1016 }
1017 EXPORT_SYMBOL(il_init_channel_map);
1018
1019 /*
1020 * il_free_channel_map - undo allocations in il_init_channel_map
1021 */
1022 void
1023 il_free_channel_map(struct il_priv *il)
1024 {
1025 kfree(il->channel_info);
1026 il->channel_count = 0;
1027 }
1028 EXPORT_SYMBOL(il_free_channel_map);
1029
1030 /*
1031 * il_get_channel_info - Find driver's ilate channel info
1032 *
1033 * Based on band and channel number.
1034 */
1035 const struct il_channel_info *
1036 il_get_channel_info(const struct il_priv *il, enum nl80211_band band,
1037 u16 channel)
1038 {
1039 int i;
1040
1041 switch (band) {
1042 case NL80211_BAND_5GHZ:
1043 for (i = 14; i < il->channel_count; i++) {
1044 if (il->channel_info[i].channel == channel)
1045 return &il->channel_info[i];
1046 }
1047 break;
1048 case NL80211_BAND_2GHZ:
1049 if (channel >= 1 && channel <= 14)
1050 return &il->channel_info[channel - 1];
1051 break;
1052 default:
1053 BUG();
1054 }
1055
1056 return NULL;
1057 }
1058 EXPORT_SYMBOL(il_get_channel_info);
1059
1060 /*
1061 * Setting power level allows the card to go to sleep when not busy.
1062 *
1063 * We calculate a sleep command based on the required latency, which
1064 * we get from mac80211.
1065 */
1066
1067 #define SLP_VEC(X0, X1, X2, X3, X4) { \
1068 cpu_to_le32(X0), \
1069 cpu_to_le32(X1), \
1070 cpu_to_le32(X2), \
1071 cpu_to_le32(X3), \
1072 cpu_to_le32(X4) \
1073 }
1074
1075 static void
1076 il_build_powertable_cmd(struct il_priv *il, struct il_powertable_cmd *cmd)
1077 {
1078 static const __le32 interval[3][IL_POWER_VEC_SIZE] = {
1079 SLP_VEC(2, 2, 4, 6, 0xFF),
1080 SLP_VEC(2, 4, 7, 10, 10),
1081 SLP_VEC(4, 7, 10, 10, 0xFF)
1082 };
1083 int i, dtim_period, no_dtim;
1084 u32 max_sleep;
1085 bool skip;
1086
1087 memset(cmd, 0, sizeof(*cmd));
1088
1089 if (il->power_data.pci_pm)
1090 cmd->flags |= IL_POWER_PCI_PM_MSK;
1091
1092 /* if no Power Save, we are done */
1093 if (il->power_data.ps_disabled)
1094 return;
1095
1096 cmd->flags = IL_POWER_DRIVER_ALLOW_SLEEP_MSK;
1097 cmd->keep_alive_seconds = 0;
1098 cmd->debug_flags = 0;
1099 cmd->rx_data_timeout = cpu_to_le32(25 * 1024);
1100 cmd->tx_data_timeout = cpu_to_le32(25 * 1024);
1101 cmd->keep_alive_beacons = 0;
1102
1103 dtim_period = il->vif ? il->vif->bss_conf.dtim_period : 0;
1104
1105 if (dtim_period <= 2) {
1106 memcpy(cmd->sleep_interval, interval[0], sizeof(interval[0]));
1107 no_dtim = 2;
1108 } else if (dtim_period <= 10) {
1109 memcpy(cmd->sleep_interval, interval[1], sizeof(interval[1]));
1110 no_dtim = 2;
1111 } else {
1112 memcpy(cmd->sleep_interval, interval[2], sizeof(interval[2]));
1113 no_dtim = 0;
1114 }
1115
1116 if (dtim_period == 0) {
1117 dtim_period = 1;
1118 skip = false;
1119 } else {
1120 skip = !!no_dtim;
1121 }
1122
1123 if (skip) {
1124 __le32 tmp = cmd->sleep_interval[IL_POWER_VEC_SIZE - 1];
1125
1126 max_sleep = le32_to_cpu(tmp);
1127 if (max_sleep == 0xFF)
1128 max_sleep = dtim_period * (skip + 1);
1129 else if (max_sleep > dtim_period)
1130 max_sleep = (max_sleep / dtim_period) * dtim_period;
1131 cmd->flags |= IL_POWER_SLEEP_OVER_DTIM_MSK;
1132 } else {
1133 max_sleep = dtim_period;
1134 cmd->flags &= ~IL_POWER_SLEEP_OVER_DTIM_MSK;
1135 }
1136
1137 for (i = 0; i < IL_POWER_VEC_SIZE; i++)
1138 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1139 cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1140 }
1141
1142 static int
1143 il_set_power(struct il_priv *il, struct il_powertable_cmd *cmd)
1144 {
1145 D_POWER("Sending power/sleep command\n");
1146 D_POWER("Flags value = 0x%08X\n", cmd->flags);
1147 D_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1148 D_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1149 D_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1150 le32_to_cpu(cmd->sleep_interval[0]),
1151 le32_to_cpu(cmd->sleep_interval[1]),
1152 le32_to_cpu(cmd->sleep_interval[2]),
1153 le32_to_cpu(cmd->sleep_interval[3]),
1154 le32_to_cpu(cmd->sleep_interval[4]));
1155
1156 return il_send_cmd_pdu(il, C_POWER_TBL,
1157 sizeof(struct il_powertable_cmd), cmd);
1158 }
1159
1160 static int
1161 il_power_set_mode(struct il_priv *il, struct il_powertable_cmd *cmd, bool force)
1162 {
1163 int ret;
1164 bool update_chains;
1165
1166 lockdep_assert_held(&il->mutex);
1167
1168 /* Don't update the RX chain when chain noise calibration is running */
1169 update_chains = il->chain_noise_data.state == IL_CHAIN_NOISE_DONE ||
1170 il->chain_noise_data.state == IL_CHAIN_NOISE_ALIVE;
1171
1172 if (!memcmp(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
1173 return 0;
1174
1175 if (!il_is_ready_rf(il))
1176 return -EIO;
1177
1178 /* scan complete use sleep_power_next, need to be updated */
1179 memcpy(&il->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
1180 if (test_bit(S_SCANNING, &il->status) && !force) {
1181 D_INFO("Defer power set mode while scanning\n");
1182 return 0;
1183 }
1184
1185 if (cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK)
1186 set_bit(S_POWER_PMI, &il->status);
1187
1188 ret = il_set_power(il, cmd);
1189 if (!ret) {
1190 if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK))
1191 clear_bit(S_POWER_PMI, &il->status);
1192
1193 if (il->ops->update_chain_flags && update_chains)
1194 il->ops->update_chain_flags(il);
1195 else if (il->ops->update_chain_flags)
1196 D_POWER("Cannot update the power, chain noise "
1197 "calibration running: %d\n",
1198 il->chain_noise_data.state);
1199
1200 memcpy(&il->power_data.sleep_cmd, cmd, sizeof(*cmd));
1201 } else
1202 IL_ERR("set power fail, ret = %d", ret);
1203
1204 return ret;
1205 }
1206
1207 int
1208 il_power_update_mode(struct il_priv *il, bool force)
1209 {
1210 struct il_powertable_cmd cmd;
1211
1212 il_build_powertable_cmd(il, &cmd);
1213
1214 return il_power_set_mode(il, &cmd, force);
1215 }
1216 EXPORT_SYMBOL(il_power_update_mode);
1217
1218 /* initialize to default */
1219 void
1220 il_power_initialize(struct il_priv *il)
1221 {
1222 u16 lctl;
1223
1224 pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
1225 il->power_data.pci_pm = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S);
1226
1227 il->power_data.debug_sleep_level_override = -1;
1228
1229 memset(&il->power_data.sleep_cmd, 0, sizeof(il->power_data.sleep_cmd));
1230 }
1231 EXPORT_SYMBOL(il_power_initialize);
1232
1233 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
1234 * sending probe req. This should be set long enough to hear probe responses
1235 * from more than one AP. */
1236 #define IL_ACTIVE_DWELL_TIME_24 (30) /* all times in msec */
1237 #define IL_ACTIVE_DWELL_TIME_52 (20)
1238
1239 #define IL_ACTIVE_DWELL_FACTOR_24GHZ (3)
1240 #define IL_ACTIVE_DWELL_FACTOR_52GHZ (2)
1241
1242 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
1243 * Must be set longer than active dwell time.
1244 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
1245 #define IL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
1246 #define IL_PASSIVE_DWELL_TIME_52 (10)
1247 #define IL_PASSIVE_DWELL_BASE (100)
1248 #define IL_CHANNEL_TUNE_TIME 5
1249
1250 static int
1251 il_send_scan_abort(struct il_priv *il)
1252 {
1253 int ret;
1254 struct il_rx_pkt *pkt;
1255 struct il_host_cmd cmd = {
1256 .id = C_SCAN_ABORT,
1257 .flags = CMD_WANT_SKB,
1258 };
1259
1260 /* Exit instantly with error when device is not ready
1261 * to receive scan abort command or it does not perform
1262 * hardware scan currently */
1263 if (!test_bit(S_READY, &il->status) ||
1264 !test_bit(S_GEO_CONFIGURED, &il->status) ||
1265 !test_bit(S_SCAN_HW, &il->status) ||
1266 test_bit(S_FW_ERROR, &il->status) ||
1267 test_bit(S_EXIT_PENDING, &il->status))
1268 return -EIO;
1269
1270 ret = il_send_cmd_sync(il, &cmd);
1271 if (ret)
1272 return ret;
1273
1274 pkt = (struct il_rx_pkt *)cmd.reply_page;
1275 if (pkt->u.status != CAN_ABORT_STATUS) {
1276 /* The scan abort will return 1 for success or
1277 * 2 for "failure". A failure condition can be
1278 * due to simply not being in an active scan which
1279 * can occur if we send the scan abort before we
1280 * the microcode has notified us that a scan is
1281 * completed. */
1282 D_SCAN("SCAN_ABORT ret %d.\n", pkt->u.status);
1283 ret = -EIO;
1284 }
1285
1286 il_free_pages(il, cmd.reply_page);
1287 return ret;
1288 }
1289
1290 static void
1291 il_complete_scan(struct il_priv *il, bool aborted)
1292 {
1293 struct cfg80211_scan_info info = {
1294 .aborted = aborted,
1295 };
1296
1297 /* check if scan was requested from mac80211 */
1298 if (il->scan_request) {
1299 D_SCAN("Complete scan in mac80211\n");
1300 ieee80211_scan_completed(il->hw, &info);
1301 }
1302
1303 il->scan_vif = NULL;
1304 il->scan_request = NULL;
1305 }
1306
1307 void
1308 il_force_scan_end(struct il_priv *il)
1309 {
1310 lockdep_assert_held(&il->mutex);
1311
1312 if (!test_bit(S_SCANNING, &il->status)) {
1313 D_SCAN("Forcing scan end while not scanning\n");
1314 return;
1315 }
1316
1317 D_SCAN("Forcing scan end\n");
1318 clear_bit(S_SCANNING, &il->status);
1319 clear_bit(S_SCAN_HW, &il->status);
1320 clear_bit(S_SCAN_ABORTING, &il->status);
1321 il_complete_scan(il, true);
1322 }
1323
1324 static void
1325 il_do_scan_abort(struct il_priv *il)
1326 {
1327 int ret;
1328
1329 lockdep_assert_held(&il->mutex);
1330
1331 if (!test_bit(S_SCANNING, &il->status)) {
1332 D_SCAN("Not performing scan to abort\n");
1333 return;
1334 }
1335
1336 if (test_and_set_bit(S_SCAN_ABORTING, &il->status)) {
1337 D_SCAN("Scan abort in progress\n");
1338 return;
1339 }
1340
1341 ret = il_send_scan_abort(il);
1342 if (ret) {
1343 D_SCAN("Send scan abort failed %d\n", ret);
1344 il_force_scan_end(il);
1345 } else
1346 D_SCAN("Successfully send scan abort\n");
1347 }
1348
1349 /*
1350 * il_scan_cancel - Cancel any currently executing HW scan
1351 */
1352 int
1353 il_scan_cancel(struct il_priv *il)
1354 {
1355 D_SCAN("Queuing abort scan\n");
1356 queue_work(il->workqueue, &il->abort_scan);
1357 return 0;
1358 }
1359 EXPORT_SYMBOL(il_scan_cancel);
1360
1361 /*
1362 * il_scan_cancel_timeout - Cancel any currently executing HW scan
1363 * @ms: amount of time to wait (in milliseconds) for scan to abort
1364 *
1365 */
1366 int
1367 il_scan_cancel_timeout(struct il_priv *il, unsigned long ms)
1368 {
1369 unsigned long timeout = jiffies + msecs_to_jiffies(ms);
1370
1371 lockdep_assert_held(&il->mutex);
1372
1373 D_SCAN("Scan cancel timeout\n");
1374
1375 il_do_scan_abort(il);
1376
1377 while (time_before_eq(jiffies, timeout)) {
1378 if (!test_bit(S_SCAN_HW, &il->status))
1379 break;
1380 msleep(20);
1381 }
1382
1383 return test_bit(S_SCAN_HW, &il->status);
1384 }
1385 EXPORT_SYMBOL(il_scan_cancel_timeout);
1386
1387 /* Service response to C_SCAN (0x80) */
1388 static void
1389 il_hdl_scan(struct il_priv *il, struct il_rx_buf *rxb)
1390 {
1391 #ifdef CONFIG_IWLEGACY_DEBUG
1392 struct il_rx_pkt *pkt = rxb_addr(rxb);
1393 struct il_scanreq_notification *notif =
1394 (struct il_scanreq_notification *)pkt->u.raw;
1395
1396 D_SCAN("Scan request status = 0x%x\n", notif->status);
1397 #endif
1398 }
1399
1400 /* Service N_SCAN_START (0x82) */
1401 static void
1402 il_hdl_scan_start(struct il_priv *il, struct il_rx_buf *rxb)
1403 {
1404 struct il_rx_pkt *pkt = rxb_addr(rxb);
1405 struct il_scanstart_notification *notif =
1406 (struct il_scanstart_notification *)pkt->u.raw;
1407 il->scan_start_tsf = le32_to_cpu(notif->tsf_low);
1408 D_SCAN("Scan start: " "%d [802.11%s] "
1409 "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", notif->channel,
1410 notif->band ? "bg" : "a", le32_to_cpu(notif->tsf_high),
1411 le32_to_cpu(notif->tsf_low), notif->status, notif->beacon_timer);
1412 }
1413
1414 /* Service N_SCAN_RESULTS (0x83) */
1415 static void
1416 il_hdl_scan_results(struct il_priv *il, struct il_rx_buf *rxb)
1417 {
1418 #ifdef CONFIG_IWLEGACY_DEBUG
1419 struct il_rx_pkt *pkt = rxb_addr(rxb);
1420 struct il_scanresults_notification *notif =
1421 (struct il_scanresults_notification *)pkt->u.raw;
1422
1423 D_SCAN("Scan ch.res: " "%d [802.11%s] " "(TSF: 0x%08X:%08X) - %d "
1424 "elapsed=%lu usec\n", notif->channel, notif->band ? "bg" : "a",
1425 le32_to_cpu(notif->tsf_high), le32_to_cpu(notif->tsf_low),
1426 le32_to_cpu(notif->stats[0]),
1427 le32_to_cpu(notif->tsf_low) - il->scan_start_tsf);
1428 #endif
1429 }
1430
1431 /* Service N_SCAN_COMPLETE (0x84) */
1432 static void
1433 il_hdl_scan_complete(struct il_priv *il, struct il_rx_buf *rxb)
1434 {
1435
1436 struct il_rx_pkt *pkt = rxb_addr(rxb);
1437 struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
1438
1439 D_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
1440 scan_notif->scanned_channels, scan_notif->tsf_low,
1441 scan_notif->tsf_high, scan_notif->status);
1442
1443 /* The HW is no longer scanning */
1444 clear_bit(S_SCAN_HW, &il->status);
1445
1446 D_SCAN("Scan on %sGHz took %dms\n",
1447 (il->scan_band == NL80211_BAND_2GHZ) ? "2.4" : "5.2",
1448 jiffies_to_msecs(jiffies - il->scan_start));
1449
1450 queue_work(il->workqueue, &il->scan_completed);
1451 }
1452
1453 void
1454 il_setup_rx_scan_handlers(struct il_priv *il)
1455 {
1456 /* scan handlers */
1457 il->handlers[C_SCAN] = il_hdl_scan;
1458 il->handlers[N_SCAN_START] = il_hdl_scan_start;
1459 il->handlers[N_SCAN_RESULTS] = il_hdl_scan_results;
1460 il->handlers[N_SCAN_COMPLETE] = il_hdl_scan_complete;
1461 }
1462 EXPORT_SYMBOL(il_setup_rx_scan_handlers);
1463
1464 u16
1465 il_get_active_dwell_time(struct il_priv *il, enum nl80211_band band,
1466 u8 n_probes)
1467 {
1468 if (band == NL80211_BAND_5GHZ)
1469 return IL_ACTIVE_DWELL_TIME_52 +
1470 IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
1471 else
1472 return IL_ACTIVE_DWELL_TIME_24 +
1473 IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
1474 }
1475 EXPORT_SYMBOL(il_get_active_dwell_time);
1476
1477 u16
1478 il_get_passive_dwell_time(struct il_priv *il, enum nl80211_band band,
1479 struct ieee80211_vif *vif)
1480 {
1481 u16 value;
1482
1483 u16 passive =
1484 (band ==
1485 NL80211_BAND_2GHZ) ? IL_PASSIVE_DWELL_BASE +
1486 IL_PASSIVE_DWELL_TIME_24 : IL_PASSIVE_DWELL_BASE +
1487 IL_PASSIVE_DWELL_TIME_52;
1488
1489 if (il_is_any_associated(il)) {
1490 /*
1491 * If we're associated, we clamp the maximum passive
1492 * dwell time to be 98% of the smallest beacon interval
1493 * (minus 2 * channel tune time)
1494 */
1495 value = il->vif ? il->vif->bss_conf.beacon_int : 0;
1496 if (value > IL_PASSIVE_DWELL_BASE || !value)
1497 value = IL_PASSIVE_DWELL_BASE;
1498 value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2;
1499 passive = min(value, passive);
1500 }
1501
1502 return passive;
1503 }
1504 EXPORT_SYMBOL(il_get_passive_dwell_time);
1505
1506 void
1507 il_init_scan_params(struct il_priv *il)
1508 {
1509 u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1;
1510 if (!il->scan_tx_ant[NL80211_BAND_5GHZ])
1511 il->scan_tx_ant[NL80211_BAND_5GHZ] = ant_idx;
1512 if (!il->scan_tx_ant[NL80211_BAND_2GHZ])
1513 il->scan_tx_ant[NL80211_BAND_2GHZ] = ant_idx;
1514 }
1515 EXPORT_SYMBOL(il_init_scan_params);
1516
1517 static int
1518 il_scan_initiate(struct il_priv *il, struct ieee80211_vif *vif)
1519 {
1520 int ret;
1521
1522 lockdep_assert_held(&il->mutex);
1523
1524 cancel_delayed_work(&il->scan_check);
1525
1526 if (!il_is_ready_rf(il)) {
1527 IL_WARN("Request scan called when driver not ready.\n");
1528 return -EIO;
1529 }
1530
1531 if (test_bit(S_SCAN_HW, &il->status)) {
1532 D_SCAN("Multiple concurrent scan requests in parallel.\n");
1533 return -EBUSY;
1534 }
1535
1536 if (test_bit(S_SCAN_ABORTING, &il->status)) {
1537 D_SCAN("Scan request while abort pending.\n");
1538 return -EBUSY;
1539 }
1540
1541 D_SCAN("Starting scan...\n");
1542
1543 set_bit(S_SCANNING, &il->status);
1544 il->scan_start = jiffies;
1545
1546 ret = il->ops->request_scan(il, vif);
1547 if (ret) {
1548 clear_bit(S_SCANNING, &il->status);
1549 return ret;
1550 }
1551
1552 queue_delayed_work(il->workqueue, &il->scan_check,
1553 IL_SCAN_CHECK_WATCHDOG);
1554
1555 return 0;
1556 }
1557
1558 int
1559 il_mac_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1560 struct ieee80211_scan_request *hw_req)
1561 {
1562 struct cfg80211_scan_request *req = &hw_req->req;
1563 struct il_priv *il = hw->priv;
1564 int ret;
1565
1566 if (req->n_channels == 0) {
1567 IL_ERR("Can not scan on no channels.\n");
1568 return -EINVAL;
1569 }
1570
1571 mutex_lock(&il->mutex);
1572 D_MAC80211("enter\n");
1573
1574 if (test_bit(S_SCANNING, &il->status)) {
1575 D_SCAN("Scan already in progress.\n");
1576 ret = -EAGAIN;
1577 goto out_unlock;
1578 }
1579
1580 /* mac80211 will only ask for one band at a time */
1581 il->scan_request = req;
1582 il->scan_vif = vif;
1583 il->scan_band = req->channels[0]->band;
1584
1585 ret = il_scan_initiate(il, vif);
1586
1587 out_unlock:
1588 D_MAC80211("leave ret %d\n", ret);
1589 mutex_unlock(&il->mutex);
1590
1591 return ret;
1592 }
1593 EXPORT_SYMBOL(il_mac_hw_scan);
1594
1595 static void
1596 il_bg_scan_check(struct work_struct *data)
1597 {
1598 struct il_priv *il =
1599 container_of(data, struct il_priv, scan_check.work);
1600
1601 D_SCAN("Scan check work\n");
1602
1603 /* Since we are here firmware does not finish scan and
1604 * most likely is in bad shape, so we don't bother to
1605 * send abort command, just force scan complete to mac80211 */
1606 mutex_lock(&il->mutex);
1607 il_force_scan_end(il);
1608 mutex_unlock(&il->mutex);
1609 }
1610
1611 /*
1612 * il_fill_probe_req - fill in all required fields and IE for probe request
1613 */
1614 u16
1615 il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame,
1616 const u8 *ta, const u8 *ies, int ie_len, int left)
1617 {
1618 int len = 0;
1619 u8 *pos = NULL;
1620
1621 /* Make sure there is enough space for the probe request,
1622 * two mandatory IEs and the data */
1623 left -= 24;
1624 if (left < 0)
1625 return 0;
1626
1627 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1628 eth_broadcast_addr(frame->da);
1629 memcpy(frame->sa, ta, ETH_ALEN);
1630 eth_broadcast_addr(frame->bssid);
1631 frame->seq_ctrl = 0;
1632
1633 len += 24;
1634
1635 /* ...next IE... */
1636 pos = &frame->u.probe_req.variable[0];
1637
1638 /* fill in our indirect SSID IE */
1639 left -= 2;
1640 if (left < 0)
1641 return 0;
1642 *pos++ = WLAN_EID_SSID;
1643 *pos++ = 0;
1644
1645 len += 2;
1646
1647 if (WARN_ON(left < ie_len))
1648 return len;
1649
1650 if (ies && ie_len) {
1651 memcpy(pos, ies, ie_len);
1652 len += ie_len;
1653 }
1654
1655 return (u16) len;
1656 }
1657 EXPORT_SYMBOL(il_fill_probe_req);
1658
1659 static void
1660 il_bg_abort_scan(struct work_struct *work)
1661 {
1662 struct il_priv *il = container_of(work, struct il_priv, abort_scan);
1663
1664 D_SCAN("Abort scan work\n");
1665
1666 /* We keep scan_check work queued in case when firmware will not
1667 * report back scan completed notification */
1668 mutex_lock(&il->mutex);
1669 il_scan_cancel_timeout(il, 200);
1670 mutex_unlock(&il->mutex);
1671 }
1672
1673 static void
1674 il_bg_scan_completed(struct work_struct *work)
1675 {
1676 struct il_priv *il = container_of(work, struct il_priv, scan_completed);
1677 bool aborted;
1678
1679 D_SCAN("Completed scan.\n");
1680
1681 cancel_delayed_work(&il->scan_check);
1682
1683 mutex_lock(&il->mutex);
1684
1685 aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status);
1686 if (aborted)
1687 D_SCAN("Aborted scan completed.\n");
1688
1689 if (!test_and_clear_bit(S_SCANNING, &il->status)) {
1690 D_SCAN("Scan already completed.\n");
1691 goto out_settings;
1692 }
1693
1694 il_complete_scan(il, aborted);
1695
1696 out_settings:
1697 /* Can we still talk to firmware ? */
1698 if (!il_is_ready_rf(il))
1699 goto out;
1700
1701 /*
1702 * We do not commit power settings while scan is pending,
1703 * do it now if the settings changed.
1704 */
1705 il_power_set_mode(il, &il->power_data.sleep_cmd_next, false);
1706 il_set_tx_power(il, il->tx_power_next, false);
1707
1708 il->ops->post_scan(il);
1709
1710 out:
1711 mutex_unlock(&il->mutex);
1712 }
1713
1714 void
1715 il_setup_scan_deferred_work(struct il_priv *il)
1716 {
1717 INIT_WORK(&il->scan_completed, il_bg_scan_completed);
1718 INIT_WORK(&il->abort_scan, il_bg_abort_scan);
1719 INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check);
1720 }
1721 EXPORT_SYMBOL(il_setup_scan_deferred_work);
1722
1723 void
1724 il_cancel_scan_deferred_work(struct il_priv *il)
1725 {
1726 cancel_work_sync(&il->abort_scan);
1727 cancel_work_sync(&il->scan_completed);
1728
1729 if (cancel_delayed_work_sync(&il->scan_check)) {
1730 mutex_lock(&il->mutex);
1731 il_force_scan_end(il);
1732 mutex_unlock(&il->mutex);
1733 }
1734 }
1735 EXPORT_SYMBOL(il_cancel_scan_deferred_work);
1736
1737 /* il->sta_lock must be held */
1738 static void
1739 il_sta_ucode_activate(struct il_priv *il, u8 sta_id)
1740 {
1741
1742 if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE))
1743 IL_ERR("ACTIVATE a non DRIVER active station id %u addr %pM\n",
1744 sta_id, il->stations[sta_id].sta.sta.addr);
1745
1746 if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) {
1747 D_ASSOC("STA id %u addr %pM already present"
1748 " in uCode (according to driver)\n", sta_id,
1749 il->stations[sta_id].sta.sta.addr);
1750 } else {
1751 il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE;
1752 D_ASSOC("Added STA id %u addr %pM to uCode\n", sta_id,
1753 il->stations[sta_id].sta.sta.addr);
1754 }
1755 }
1756
1757 static int
1758 il_process_add_sta_resp(struct il_priv *il, struct il_addsta_cmd *addsta,
1759 struct il_rx_pkt *pkt, bool sync)
1760 {
1761 u8 sta_id = addsta->sta.sta_id;
1762 unsigned long flags;
1763 int ret = -EIO;
1764
1765 if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1766 IL_ERR("Bad return from C_ADD_STA (0x%08X)\n", pkt->hdr.flags);
1767 return ret;
1768 }
1769
1770 D_INFO("Processing response for adding station %u\n", sta_id);
1771
1772 spin_lock_irqsave(&il->sta_lock, flags);
1773
1774 switch (pkt->u.add_sta.status) {
1775 case ADD_STA_SUCCESS_MSK:
1776 D_INFO("C_ADD_STA PASSED\n");
1777 il_sta_ucode_activate(il, sta_id);
1778 ret = 0;
1779 break;
1780 case ADD_STA_NO_ROOM_IN_TBL:
1781 IL_ERR("Adding station %d failed, no room in table.\n", sta_id);
1782 break;
1783 case ADD_STA_NO_BLOCK_ACK_RESOURCE:
1784 IL_ERR("Adding station %d failed, no block ack resource.\n",
1785 sta_id);
1786 break;
1787 case ADD_STA_MODIFY_NON_EXIST_STA:
1788 IL_ERR("Attempting to modify non-existing station %d\n",
1789 sta_id);
1790 break;
1791 default:
1792 D_ASSOC("Received C_ADD_STA:(0x%08X)\n", pkt->u.add_sta.status);
1793 break;
1794 }
1795
1796 D_INFO("%s station id %u addr %pM\n",
1797 il->stations[sta_id].sta.mode ==
1798 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", sta_id,
1799 il->stations[sta_id].sta.sta.addr);
1800
1801 /*
1802 * XXX: The MAC address in the command buffer is often changed from
1803 * the original sent to the device. That is, the MAC address
1804 * written to the command buffer often is not the same MAC address
1805 * read from the command buffer when the command returns. This
1806 * issue has not yet been resolved and this debugging is left to
1807 * observe the problem.
1808 */
1809 D_INFO("%s station according to cmd buffer %pM\n",
1810 il->stations[sta_id].sta.mode ==
1811 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", addsta->sta.addr);
1812 spin_unlock_irqrestore(&il->sta_lock, flags);
1813
1814 return ret;
1815 }
1816
1817 static void
1818 il_add_sta_callback(struct il_priv *il, struct il_device_cmd *cmd,
1819 struct il_rx_pkt *pkt)
1820 {
1821 struct il_addsta_cmd *addsta = (struct il_addsta_cmd *)cmd->cmd.payload;
1822
1823 il_process_add_sta_resp(il, addsta, pkt, false);
1824
1825 }
1826
1827 int
1828 il_send_add_sta(struct il_priv *il, struct il_addsta_cmd *sta, u8 flags)
1829 {
1830 struct il_rx_pkt *pkt = NULL;
1831 int ret = 0;
1832 u8 data[sizeof(*sta)];
1833 struct il_host_cmd cmd = {
1834 .id = C_ADD_STA,
1835 .flags = flags,
1836 .data = data,
1837 };
1838 u8 sta_id __maybe_unused = sta->sta.sta_id;
1839
1840 D_INFO("Adding sta %u (%pM) %ssynchronously\n", sta_id, sta->sta.addr,
1841 flags & CMD_ASYNC ? "a" : "");
1842
1843 if (flags & CMD_ASYNC)
1844 cmd.callback = il_add_sta_callback;
1845 else {
1846 cmd.flags |= CMD_WANT_SKB;
1847 might_sleep();
1848 }
1849
1850 cmd.len = il->ops->build_addsta_hcmd(sta, data);
1851 ret = il_send_cmd(il, &cmd);
1852 if (ret)
1853 return ret;
1854 if (flags & CMD_ASYNC)
1855 return 0;
1856
1857 pkt = (struct il_rx_pkt *)cmd.reply_page;
1858 ret = il_process_add_sta_resp(il, sta, pkt, true);
1859
1860 il_free_pages(il, cmd.reply_page);
1861
1862 return ret;
1863 }
1864 EXPORT_SYMBOL(il_send_add_sta);
1865
1866 static void
1867 il_set_ht_add_station(struct il_priv *il, u8 idx, struct ieee80211_sta *sta)
1868 {
1869 struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->deflink.ht_cap;
1870 __le32 sta_flags;
1871
1872 if (!sta || !sta_ht_inf->ht_supported)
1873 goto done;
1874
1875 D_ASSOC("spatial multiplexing power save mode: %s\n",
1876 (sta->deflink.smps_mode == IEEE80211_SMPS_STATIC) ? "static" :
1877 (sta->deflink.smps_mode == IEEE80211_SMPS_DYNAMIC) ? "dynamic" :
1878 "disabled");
1879
1880 sta_flags = il->stations[idx].sta.station_flags;
1881
1882 sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
1883
1884 switch (sta->deflink.smps_mode) {
1885 case IEEE80211_SMPS_STATIC:
1886 sta_flags |= STA_FLG_MIMO_DIS_MSK;
1887 break;
1888 case IEEE80211_SMPS_DYNAMIC:
1889 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
1890 break;
1891 case IEEE80211_SMPS_OFF:
1892 break;
1893 default:
1894 IL_WARN("Invalid MIMO PS mode %d\n", sta->deflink.smps_mode);
1895 break;
1896 }
1897
1898 sta_flags |=
1899 cpu_to_le32((u32) sta_ht_inf->
1900 ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
1901
1902 sta_flags |=
1903 cpu_to_le32((u32) sta_ht_inf->
1904 ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
1905
1906 if (il_is_ht40_tx_allowed(il, &sta->deflink.ht_cap))
1907 sta_flags |= STA_FLG_HT40_EN_MSK;
1908 else
1909 sta_flags &= ~STA_FLG_HT40_EN_MSK;
1910
1911 il->stations[idx].sta.station_flags = sta_flags;
1912 done:
1913 return;
1914 }
1915
1916 /*
1917 * il_prep_station - Prepare station information for addition
1918 *
1919 * should be called with sta_lock held
1920 */
1921 u8
1922 il_prep_station(struct il_priv *il, const u8 *addr, bool is_ap,
1923 struct ieee80211_sta *sta)
1924 {
1925 struct il_station_entry *station;
1926 int i;
1927 u8 sta_id = IL_INVALID_STATION;
1928 u16 rate;
1929
1930 if (is_ap)
1931 sta_id = IL_AP_ID;
1932 else if (is_broadcast_ether_addr(addr))
1933 sta_id = il->hw_params.bcast_id;
1934 else
1935 for (i = IL_STA_ID; i < il->hw_params.max_stations; i++) {
1936 if (ether_addr_equal(il->stations[i].sta.sta.addr,
1937 addr)) {
1938 sta_id = i;
1939 break;
1940 }
1941
1942 if (!il->stations[i].used &&
1943 sta_id == IL_INVALID_STATION)
1944 sta_id = i;
1945 }
1946
1947 /*
1948 * These two conditions have the same outcome, but keep them
1949 * separate
1950 */
1951 if (unlikely(sta_id == IL_INVALID_STATION))
1952 return sta_id;
1953
1954 /*
1955 * uCode is not able to deal with multiple requests to add a
1956 * station. Keep track if one is in progress so that we do not send
1957 * another.
1958 */
1959 if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1960 D_INFO("STA %d already in process of being added.\n", sta_id);
1961 return sta_id;
1962 }
1963
1964 if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1965 (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) &&
1966 ether_addr_equal(il->stations[sta_id].sta.sta.addr, addr)) {
1967 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
1968 sta_id, addr);
1969 return sta_id;
1970 }
1971
1972 station = &il->stations[sta_id];
1973 station->used = IL_STA_DRIVER_ACTIVE;
1974 D_ASSOC("Add STA to driver ID %d: %pM\n", sta_id, addr);
1975 il->num_stations++;
1976
1977 /* Set up the C_ADD_STA command to send to device */
1978 memset(&station->sta, 0, sizeof(struct il_addsta_cmd));
1979 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
1980 station->sta.mode = 0;
1981 station->sta.sta.sta_id = sta_id;
1982 station->sta.station_flags = 0;
1983
1984 /*
1985 * OK to call unconditionally, since local stations (IBSS BSSID
1986 * STA and broadcast STA) pass in a NULL sta, and mac80211
1987 * doesn't allow HT IBSS.
1988 */
1989 il_set_ht_add_station(il, sta_id, sta);
1990
1991 /* 3945 only */
1992 rate = (il->band == NL80211_BAND_5GHZ) ? RATE_6M_PLCP : RATE_1M_PLCP;
1993 /* Turn on both antennas for the station... */
1994 station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
1995
1996 return sta_id;
1997
1998 }
1999 EXPORT_SYMBOL_GPL(il_prep_station);
2000
2001 #define STA_WAIT_TIMEOUT (HZ/2)
2002
2003 /*
2004 * il_add_station_common -
2005 */
2006 int
2007 il_add_station_common(struct il_priv *il, const u8 *addr, bool is_ap,
2008 struct ieee80211_sta *sta, u8 *sta_id_r)
2009 {
2010 unsigned long flags_spin;
2011 int ret = 0;
2012 u8 sta_id;
2013 struct il_addsta_cmd sta_cmd;
2014
2015 *sta_id_r = 0;
2016 spin_lock_irqsave(&il->sta_lock, flags_spin);
2017 sta_id = il_prep_station(il, addr, is_ap, sta);
2018 if (sta_id == IL_INVALID_STATION) {
2019 IL_ERR("Unable to prepare station %pM for addition\n", addr);
2020 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2021 return -EINVAL;
2022 }
2023
2024 /*
2025 * uCode is not able to deal with multiple requests to add a
2026 * station. Keep track if one is in progress so that we do not send
2027 * another.
2028 */
2029 if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
2030 D_INFO("STA %d already in process of being added.\n", sta_id);
2031 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2032 return -EEXIST;
2033 }
2034
2035 if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
2036 (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2037 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
2038 sta_id, addr);
2039 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2040 return -EEXIST;
2041 }
2042
2043 il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS;
2044 memcpy(&sta_cmd, &il->stations[sta_id].sta,
2045 sizeof(struct il_addsta_cmd));
2046 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2047
2048 /* Add station to device's station table */
2049 ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2050 if (ret) {
2051 spin_lock_irqsave(&il->sta_lock, flags_spin);
2052 IL_ERR("Adding station %pM failed.\n",
2053 il->stations[sta_id].sta.sta.addr);
2054 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2055 il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2056 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2057 }
2058 *sta_id_r = sta_id;
2059 return ret;
2060 }
2061 EXPORT_SYMBOL(il_add_station_common);
2062
2063 /*
2064 * il_sta_ucode_deactivate - deactivate ucode status for a station
2065 *
2066 * il->sta_lock must be held
2067 */
2068 static void
2069 il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id)
2070 {
2071 /* Ucode must be active and driver must be non active */
2072 if ((il->stations[sta_id].
2073 used & (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) !=
2074 IL_STA_UCODE_ACTIVE)
2075 IL_ERR("removed non active STA %u\n", sta_id);
2076
2077 il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE;
2078
2079 memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry));
2080 D_ASSOC("Removed STA %u\n", sta_id);
2081 }
2082
2083 static int
2084 il_send_remove_station(struct il_priv *il, const u8 * addr, int sta_id,
2085 bool temporary)
2086 {
2087 struct il_rx_pkt *pkt;
2088 int ret;
2089
2090 unsigned long flags_spin;
2091 struct il_rem_sta_cmd rm_sta_cmd;
2092
2093 struct il_host_cmd cmd = {
2094 .id = C_REM_STA,
2095 .len = sizeof(struct il_rem_sta_cmd),
2096 .flags = CMD_SYNC,
2097 .data = &rm_sta_cmd,
2098 };
2099
2100 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
2101 rm_sta_cmd.num_sta = 1;
2102 memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
2103
2104 cmd.flags |= CMD_WANT_SKB;
2105
2106 ret = il_send_cmd(il, &cmd);
2107
2108 if (ret)
2109 return ret;
2110
2111 pkt = (struct il_rx_pkt *)cmd.reply_page;
2112 if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
2113 IL_ERR("Bad return from C_REM_STA (0x%08X)\n", pkt->hdr.flags);
2114 ret = -EIO;
2115 }
2116
2117 if (!ret) {
2118 switch (pkt->u.rem_sta.status) {
2119 case REM_STA_SUCCESS_MSK:
2120 if (!temporary) {
2121 spin_lock_irqsave(&il->sta_lock, flags_spin);
2122 il_sta_ucode_deactivate(il, sta_id);
2123 spin_unlock_irqrestore(&il->sta_lock,
2124 flags_spin);
2125 }
2126 D_ASSOC("C_REM_STA PASSED\n");
2127 break;
2128 default:
2129 ret = -EIO;
2130 IL_ERR("C_REM_STA failed\n");
2131 break;
2132 }
2133 }
2134 il_free_pages(il, cmd.reply_page);
2135
2136 return ret;
2137 }
2138
2139 /*
2140 * il_remove_station - Remove driver's knowledge of station.
2141 */
2142 int
2143 il_remove_station(struct il_priv *il, const u8 sta_id, const u8 * addr)
2144 {
2145 unsigned long flags;
2146
2147 if (!il_is_ready(il)) {
2148 D_INFO("Unable to remove station %pM, device not ready.\n",
2149 addr);
2150 /*
2151 * It is typical for stations to be removed when we are
2152 * going down. Return success since device will be down
2153 * soon anyway
2154 */
2155 return 0;
2156 }
2157
2158 D_ASSOC("Removing STA from driver:%d %pM\n", sta_id, addr);
2159
2160 if (WARN_ON(sta_id == IL_INVALID_STATION))
2161 return -EINVAL;
2162
2163 spin_lock_irqsave(&il->sta_lock, flags);
2164
2165 if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2166 D_INFO("Removing %pM but non DRIVER active\n", addr);
2167 goto out_err;
2168 }
2169
2170 if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2171 D_INFO("Removing %pM but non UCODE active\n", addr);
2172 goto out_err;
2173 }
2174
2175 if (il->stations[sta_id].used & IL_STA_LOCAL) {
2176 kfree(il->stations[sta_id].lq);
2177 il->stations[sta_id].lq = NULL;
2178 }
2179
2180 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2181
2182 il->num_stations--;
2183
2184 BUG_ON(il->num_stations < 0);
2185
2186 spin_unlock_irqrestore(&il->sta_lock, flags);
2187
2188 return il_send_remove_station(il, addr, sta_id, false);
2189 out_err:
2190 spin_unlock_irqrestore(&il->sta_lock, flags);
2191 return -EINVAL;
2192 }
2193 EXPORT_SYMBOL_GPL(il_remove_station);
2194
2195 /*
2196 * il_clear_ucode_stations - clear ucode station table bits
2197 *
2198 * This function clears all the bits in the driver indicating
2199 * which stations are active in the ucode. Call when something
2200 * other than explicit station management would cause this in
2201 * the ucode, e.g. unassociated RXON.
2202 */
2203 void
2204 il_clear_ucode_stations(struct il_priv *il)
2205 {
2206 int i;
2207 unsigned long flags_spin;
2208 bool cleared = false;
2209
2210 D_INFO("Clearing ucode stations in driver\n");
2211
2212 spin_lock_irqsave(&il->sta_lock, flags_spin);
2213 for (i = 0; i < il->hw_params.max_stations; i++) {
2214 if (il->stations[i].used & IL_STA_UCODE_ACTIVE) {
2215 D_INFO("Clearing ucode active for station %d\n", i);
2216 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2217 cleared = true;
2218 }
2219 }
2220 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2221
2222 if (!cleared)
2223 D_INFO("No active stations found to be cleared\n");
2224 }
2225 EXPORT_SYMBOL(il_clear_ucode_stations);
2226
2227 /*
2228 * il_restore_stations() - Restore driver known stations to device
2229 *
2230 * All stations considered active by driver, but not present in ucode, is
2231 * restored.
2232 *
2233 * Function sleeps.
2234 */
2235 void
2236 il_restore_stations(struct il_priv *il)
2237 {
2238 struct il_addsta_cmd sta_cmd;
2239 struct il_link_quality_cmd lq;
2240 unsigned long flags_spin;
2241 int i;
2242 bool found = false;
2243 int ret;
2244 bool send_lq;
2245
2246 if (!il_is_ready(il)) {
2247 D_INFO("Not ready yet, not restoring any stations.\n");
2248 return;
2249 }
2250
2251 D_ASSOC("Restoring all known stations ... start.\n");
2252 spin_lock_irqsave(&il->sta_lock, flags_spin);
2253 for (i = 0; i < il->hw_params.max_stations; i++) {
2254 if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) &&
2255 !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) {
2256 D_ASSOC("Restoring sta %pM\n",
2257 il->stations[i].sta.sta.addr);
2258 il->stations[i].sta.mode = 0;
2259 il->stations[i].used |= IL_STA_UCODE_INPROGRESS;
2260 found = true;
2261 }
2262 }
2263
2264 for (i = 0; i < il->hw_params.max_stations; i++) {
2265 if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) {
2266 memcpy(&sta_cmd, &il->stations[i].sta,
2267 sizeof(struct il_addsta_cmd));
2268 send_lq = false;
2269 if (il->stations[i].lq) {
2270 memcpy(&lq, il->stations[i].lq,
2271 sizeof(struct il_link_quality_cmd));
2272 send_lq = true;
2273 }
2274 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2275 ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2276 if (ret) {
2277 spin_lock_irqsave(&il->sta_lock, flags_spin);
2278 IL_ERR("Adding station %pM failed.\n",
2279 il->stations[i].sta.sta.addr);
2280 il->stations[i].used &= ~IL_STA_DRIVER_ACTIVE;
2281 il->stations[i].used &=
2282 ~IL_STA_UCODE_INPROGRESS;
2283 spin_unlock_irqrestore(&il->sta_lock,
2284 flags_spin);
2285 }
2286 /*
2287 * Rate scaling has already been initialized, send
2288 * current LQ command
2289 */
2290 if (send_lq)
2291 il_send_lq_cmd(il, &lq, CMD_SYNC, true);
2292 spin_lock_irqsave(&il->sta_lock, flags_spin);
2293 il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS;
2294 }
2295 }
2296
2297 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2298 if (!found)
2299 D_INFO("Restoring all known stations"
2300 " .... no stations to be restored.\n");
2301 else
2302 D_INFO("Restoring all known stations" " .... complete.\n");
2303 }
2304 EXPORT_SYMBOL(il_restore_stations);
2305
2306 int
2307 il_get_free_ucode_key_idx(struct il_priv *il)
2308 {
2309 int i;
2310
2311 for (i = 0; i < il->sta_key_max_num; i++)
2312 if (!test_and_set_bit(i, &il->ucode_key_table))
2313 return i;
2314
2315 return WEP_INVALID_OFFSET;
2316 }
2317 EXPORT_SYMBOL(il_get_free_ucode_key_idx);
2318
2319 void
2320 il_dealloc_bcast_stations(struct il_priv *il)
2321 {
2322 unsigned long flags;
2323 int i;
2324
2325 spin_lock_irqsave(&il->sta_lock, flags);
2326 for (i = 0; i < il->hw_params.max_stations; i++) {
2327 if (!(il->stations[i].used & IL_STA_BCAST))
2328 continue;
2329
2330 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2331 il->num_stations--;
2332 BUG_ON(il->num_stations < 0);
2333 kfree(il->stations[i].lq);
2334 il->stations[i].lq = NULL;
2335 }
2336 spin_unlock_irqrestore(&il->sta_lock, flags);
2337 }
2338 EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations);
2339
2340 #ifdef CONFIG_IWLEGACY_DEBUG
2341 static void
2342 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2343 {
2344 int i;
2345 D_RATE("lq station id 0x%x\n", lq->sta_id);
2346 D_RATE("lq ant 0x%X 0x%X\n", lq->general_params.single_stream_ant_msk,
2347 lq->general_params.dual_stream_ant_msk);
2348
2349 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
2350 D_RATE("lq idx %d 0x%X\n", i, lq->rs_table[i].rate_n_flags);
2351 }
2352 #else
2353 static inline void
2354 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2355 {
2356 }
2357 #endif
2358
2359 /*
2360 * il_is_lq_table_valid() - Test one aspect of LQ cmd for validity
2361 *
2362 * It sometimes happens when a HT rate has been in use and we
2363 * loose connectivity with AP then mac80211 will first tell us that the
2364 * current channel is not HT anymore before removing the station. In such a
2365 * scenario the RXON flags will be updated to indicate we are not
2366 * communicating HT anymore, but the LQ command may still contain HT rates.
2367 * Test for this to prevent driver from sending LQ command between the time
2368 * RXON flags are updated and when LQ command is updated.
2369 */
2370 static bool
2371 il_is_lq_table_valid(struct il_priv *il, struct il_link_quality_cmd *lq)
2372 {
2373 int i;
2374
2375 if (il->ht.enabled)
2376 return true;
2377
2378 D_INFO("Channel %u is not an HT channel\n", il->active.channel);
2379 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
2380 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
2381 D_INFO("idx %d of LQ expects HT channel\n", i);
2382 return false;
2383 }
2384 }
2385 return true;
2386 }
2387
2388 /*
2389 * il_send_lq_cmd() - Send link quality command
2390 * @init: This command is sent as part of station initialization right
2391 * after station has been added.
2392 *
2393 * The link quality command is sent as the last step of station creation.
2394 * This is the special case in which init is set and we call a callback in
2395 * this case to clear the state indicating that station creation is in
2396 * progress.
2397 */
2398 int
2399 il_send_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq,
2400 u8 flags, bool init)
2401 {
2402 int ret = 0;
2403 unsigned long flags_spin;
2404
2405 struct il_host_cmd cmd = {
2406 .id = C_TX_LINK_QUALITY_CMD,
2407 .len = sizeof(struct il_link_quality_cmd),
2408 .flags = flags,
2409 .data = lq,
2410 };
2411
2412 if (WARN_ON(lq->sta_id == IL_INVALID_STATION))
2413 return -EINVAL;
2414
2415 spin_lock_irqsave(&il->sta_lock, flags_spin);
2416 if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2417 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2418 return -EINVAL;
2419 }
2420 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2421
2422 il_dump_lq_cmd(il, lq);
2423 BUG_ON(init && (cmd.flags & CMD_ASYNC));
2424
2425 if (il_is_lq_table_valid(il, lq))
2426 ret = il_send_cmd(il, &cmd);
2427 else
2428 ret = -EINVAL;
2429
2430 if (cmd.flags & CMD_ASYNC)
2431 return ret;
2432
2433 if (init) {
2434 D_INFO("init LQ command complete,"
2435 " clearing sta addition status for sta %d\n",
2436 lq->sta_id);
2437 spin_lock_irqsave(&il->sta_lock, flags_spin);
2438 il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2439 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2440 }
2441 return ret;
2442 }
2443 EXPORT_SYMBOL(il_send_lq_cmd);
2444
2445 int
2446 il_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2447 struct ieee80211_sta *sta)
2448 {
2449 struct il_priv *il = hw->priv;
2450 struct il_station_priv_common *sta_common = (void *)sta->drv_priv;
2451 int ret;
2452
2453 mutex_lock(&il->mutex);
2454 D_MAC80211("enter station %pM\n", sta->addr);
2455
2456 ret = il_remove_station(il, sta_common->sta_id, sta->addr);
2457 if (ret)
2458 IL_ERR("Error removing station %pM\n", sta->addr);
2459
2460 D_MAC80211("leave ret %d\n", ret);
2461 mutex_unlock(&il->mutex);
2462
2463 return ret;
2464 }
2465 EXPORT_SYMBOL(il_mac_sta_remove);
2466
2467 /************************** RX-FUNCTIONS ****************************/
2468 /*
2469 * Rx theory of operation
2470 *
2471 * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
2472 * each of which point to Receive Buffers to be filled by the NIC. These get
2473 * used not only for Rx frames, but for any command response or notification
2474 * from the NIC. The driver and NIC manage the Rx buffers by means
2475 * of idxes into the circular buffer.
2476 *
2477 * Rx Queue Indexes
2478 * The host/firmware share two idx registers for managing the Rx buffers.
2479 *
2480 * The READ idx maps to the first position that the firmware may be writing
2481 * to -- the driver can read up to (but not including) this position and get
2482 * good data.
2483 * The READ idx is managed by the firmware once the card is enabled.
2484 *
2485 * The WRITE idx maps to the last position the driver has read from -- the
2486 * position preceding WRITE is the last slot the firmware can place a packet.
2487 *
2488 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
2489 * WRITE = READ.
2490 *
2491 * During initialization, the host sets up the READ queue position to the first
2492 * IDX position, and WRITE to the last (READ - 1 wrapped)
2493 *
2494 * When the firmware places a packet in a buffer, it will advance the READ idx
2495 * and fire the RX interrupt. The driver can then query the READ idx and
2496 * process as many packets as possible, moving the WRITE idx forward as it
2497 * resets the Rx queue buffers with new memory.
2498 *
2499 * The management in the driver is as follows:
2500 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
2501 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
2502 * to replenish the iwl->rxq->rx_free.
2503 * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the
2504 * iwl->rxq is replenished and the READ IDX is updated (updating the
2505 * 'processed' and 'read' driver idxes as well)
2506 * + A received packet is processed and handed to the kernel network stack,
2507 * detached from the iwl->rxq. The driver 'processed' idx is updated.
2508 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
2509 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
2510 * IDX is not incremented and iwl->status(RX_STALLED) is set. If there
2511 * were enough free buffers and RX_STALLED is set it is cleared.
2512 *
2513 *
2514 * Driver sequence:
2515 *
2516 * il_rx_queue_alloc() Allocates rx_free
2517 * il_rx_replenish() Replenishes rx_free list from rx_used, and calls
2518 * il_rx_queue_restock
2519 * il_rx_queue_restock() Moves available buffers from rx_free into Rx
2520 * queue, updates firmware pointers, and updates
2521 * the WRITE idx. If insufficient rx_free buffers
2522 * are available, schedules il_rx_replenish
2523 *
2524 * -- enable interrupts --
2525 * ISR - il_rx() Detach il_rx_bufs from pool up to the
2526 * READ IDX, detaching the SKB from the pool.
2527 * Moves the packet buffer from queue to rx_used.
2528 * Calls il_rx_queue_restock to refill any empty
2529 * slots.
2530 * ...
2531 *
2532 */
2533
2534 /*
2535 * il_rx_queue_space - Return number of free slots available in queue.
2536 */
2537 int
2538 il_rx_queue_space(const struct il_rx_queue *q)
2539 {
2540 int s = q->read - q->write;
2541 if (s <= 0)
2542 s += RX_QUEUE_SIZE;
2543 /* keep some buffer to not confuse full and empty queue */
2544 s -= 2;
2545 if (s < 0)
2546 s = 0;
2547 return s;
2548 }
2549 EXPORT_SYMBOL(il_rx_queue_space);
2550
2551 /*
2552 * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue
2553 */
2554 void
2555 il_rx_queue_update_write_ptr(struct il_priv *il, struct il_rx_queue *q)
2556 {
2557 unsigned long flags;
2558 u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg;
2559 u32 reg;
2560
2561 spin_lock_irqsave(&q->lock, flags);
2562
2563 if (q->need_update == 0)
2564 goto exit_unlock;
2565
2566 /* If power-saving is in use, make sure device is awake */
2567 if (test_bit(S_POWER_PMI, &il->status)) {
2568 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2569
2570 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2571 D_INFO("Rx queue requesting wakeup," " GP1 = 0x%x\n",
2572 reg);
2573 il_set_bit(il, CSR_GP_CNTRL,
2574 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2575 goto exit_unlock;
2576 }
2577
2578 q->write_actual = (q->write & ~0x7);
2579 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2580
2581 /* Else device is assumed to be awake */
2582 } else {
2583 /* Device expects a multiple of 8 */
2584 q->write_actual = (q->write & ~0x7);
2585 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2586 }
2587
2588 q->need_update = 0;
2589
2590 exit_unlock:
2591 spin_unlock_irqrestore(&q->lock, flags);
2592 }
2593 EXPORT_SYMBOL(il_rx_queue_update_write_ptr);
2594
2595 int
2596 il_rx_queue_alloc(struct il_priv *il)
2597 {
2598 struct il_rx_queue *rxq = &il->rxq;
2599 struct device *dev = &il->pci_dev->dev;
2600 int i;
2601
2602 spin_lock_init(&rxq->lock);
2603 INIT_LIST_HEAD(&rxq->rx_free);
2604 INIT_LIST_HEAD(&rxq->rx_used);
2605
2606 /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
2607 rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma,
2608 GFP_KERNEL);
2609 if (!rxq->bd)
2610 goto err_bd;
2611
2612 rxq->rb_stts = dma_alloc_coherent(dev, sizeof(struct il_rb_status),
2613 &rxq->rb_stts_dma, GFP_KERNEL);
2614 if (!rxq->rb_stts)
2615 goto err_rb;
2616
2617 /* Fill the rx_used queue with _all_ of the Rx buffers */
2618 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
2619 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
2620
2621 /* Set us so that we have processed and used all buffers, but have
2622 * not restocked the Rx queue with fresh buffers */
2623 rxq->read = rxq->write = 0;
2624 rxq->write_actual = 0;
2625 rxq->free_count = 0;
2626 rxq->need_update = 0;
2627 return 0;
2628
2629 err_rb:
2630 dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
2631 rxq->bd_dma);
2632 err_bd:
2633 return -ENOMEM;
2634 }
2635 EXPORT_SYMBOL(il_rx_queue_alloc);
2636
2637 void
2638 il_hdl_spectrum_measurement(struct il_priv *il, struct il_rx_buf *rxb)
2639 {
2640 struct il_rx_pkt *pkt = rxb_addr(rxb);
2641 struct il_spectrum_notification *report = &(pkt->u.spectrum_notif);
2642
2643 if (!report->state) {
2644 D_11H("Spectrum Measure Notification: Start\n");
2645 return;
2646 }
2647
2648 memcpy(&il->measure_report, report, sizeof(*report));
2649 il->measurement_status |= MEASUREMENT_READY;
2650 }
2651 EXPORT_SYMBOL(il_hdl_spectrum_measurement);
2652
2653 /*
2654 * returns non-zero if packet should be dropped
2655 */
2656 int
2657 il_set_decrypted_flag(struct il_priv *il, struct ieee80211_hdr *hdr,
2658 u32 decrypt_res, struct ieee80211_rx_status *stats)
2659 {
2660 u16 fc = le16_to_cpu(hdr->frame_control);
2661
2662 /*
2663 * All contexts have the same setting here due to it being
2664 * a module parameter, so OK to check any context.
2665 */
2666 if (il->active.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2667 return 0;
2668
2669 if (!(fc & IEEE80211_FCTL_PROTECTED))
2670 return 0;
2671
2672 D_RX("decrypt_res:0x%x\n", decrypt_res);
2673 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2674 case RX_RES_STATUS_SEC_TYPE_TKIP:
2675 /* The uCode has got a bad phase 1 Key, pushes the packet.
2676 * Decryption will be done in SW. */
2677 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2678 RX_RES_STATUS_BAD_KEY_TTAK)
2679 break;
2680 fallthrough;
2681
2682 case RX_RES_STATUS_SEC_TYPE_WEP:
2683 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2684 RX_RES_STATUS_BAD_ICV_MIC) {
2685 /* bad ICV, the packet is destroyed since the
2686 * decryption is inplace, drop it */
2687 D_RX("Packet destroyed\n");
2688 return -1;
2689 }
2690 fallthrough;
2691 case RX_RES_STATUS_SEC_TYPE_CCMP:
2692 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2693 RX_RES_STATUS_DECRYPT_OK) {
2694 D_RX("hw decrypt successfully!!!\n");
2695 stats->flag |= RX_FLAG_DECRYPTED;
2696 }
2697 break;
2698
2699 default:
2700 break;
2701 }
2702 return 0;
2703 }
2704 EXPORT_SYMBOL(il_set_decrypted_flag);
2705
2706 /*
2707 * il_txq_update_write_ptr - Send new write idx to hardware
2708 */
2709 void
2710 il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq)
2711 {
2712 u32 reg = 0;
2713 int txq_id = txq->q.id;
2714
2715 if (txq->need_update == 0)
2716 return;
2717
2718 /* if we're trying to save power */
2719 if (test_bit(S_POWER_PMI, &il->status)) {
2720 /* wake up nic if it's powered down ...
2721 * uCode will wake up, and interrupt us again, so next
2722 * time we'll skip this part. */
2723 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2724
2725 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2726 D_INFO("Tx queue %d requesting wakeup," " GP1 = 0x%x\n",
2727 txq_id, reg);
2728 il_set_bit(il, CSR_GP_CNTRL,
2729 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2730 return;
2731 }
2732
2733 il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2734
2735 /*
2736 * else not in power-save mode,
2737 * uCode will never sleep when we're
2738 * trying to tx (during RFKILL, we're not trying to tx).
2739 */
2740 } else
2741 _il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2742 txq->need_update = 0;
2743 }
2744 EXPORT_SYMBOL(il_txq_update_write_ptr);
2745
2746 /*
2747 * il_tx_queue_unmap - Unmap any remaining DMA mappings and free skb's
2748 */
2749 void
2750 il_tx_queue_unmap(struct il_priv *il, int txq_id)
2751 {
2752 struct il_tx_queue *txq = &il->txq[txq_id];
2753 struct il_queue *q = &txq->q;
2754
2755 if (q->n_bd == 0)
2756 return;
2757
2758 while (q->write_ptr != q->read_ptr) {
2759 il->ops->txq_free_tfd(il, txq);
2760 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2761 }
2762 }
2763 EXPORT_SYMBOL(il_tx_queue_unmap);
2764
2765 /*
2766 * il_tx_queue_free - Deallocate DMA queue.
2767 * @txq: Transmit queue to deallocate.
2768 *
2769 * Empty queue by removing and destroying all BD's.
2770 * Free all buffers.
2771 * 0-fill, but do not free "txq" descriptor structure.
2772 */
2773 void
2774 il_tx_queue_free(struct il_priv *il, int txq_id)
2775 {
2776 struct il_tx_queue *txq = &il->txq[txq_id];
2777 struct device *dev = &il->pci_dev->dev;
2778 int i;
2779
2780 il_tx_queue_unmap(il, txq_id);
2781
2782 /* De-alloc array of command/tx buffers */
2783 if (txq->cmd) {
2784 for (i = 0; i < TFD_TX_CMD_SLOTS; i++)
2785 kfree(txq->cmd[i]);
2786 }
2787
2788 /* De-alloc circular buffer of TFDs */
2789 if (txq->q.n_bd)
2790 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2791 txq->tfds, txq->q.dma_addr);
2792
2793 /* De-alloc array of per-TFD driver data */
2794 kfree(txq->skbs);
2795 txq->skbs = NULL;
2796
2797 /* deallocate arrays */
2798 kfree(txq->cmd);
2799 kfree(txq->meta);
2800 txq->cmd = NULL;
2801 txq->meta = NULL;
2802
2803 /* 0-fill queue descriptor structure */
2804 memset(txq, 0, sizeof(*txq));
2805 }
2806 EXPORT_SYMBOL(il_tx_queue_free);
2807
2808 /*
2809 * il_cmd_queue_unmap - Unmap any remaining DMA mappings from command queue
2810 */
2811 void
2812 il_cmd_queue_unmap(struct il_priv *il)
2813 {
2814 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2815 struct il_queue *q = &txq->q;
2816 int i;
2817
2818 if (q->n_bd == 0)
2819 return;
2820
2821 while (q->read_ptr != q->write_ptr) {
2822 i = il_get_cmd_idx(q, q->read_ptr, 0);
2823
2824 if (txq->meta[i].flags & CMD_MAPPED) {
2825 dma_unmap_single(&il->pci_dev->dev,
2826 dma_unmap_addr(&txq->meta[i], mapping),
2827 dma_unmap_len(&txq->meta[i], len),
2828 DMA_BIDIRECTIONAL);
2829 txq->meta[i].flags = 0;
2830 }
2831
2832 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2833 }
2834
2835 i = q->n_win;
2836 if (txq->meta[i].flags & CMD_MAPPED) {
2837 dma_unmap_single(&il->pci_dev->dev,
2838 dma_unmap_addr(&txq->meta[i], mapping),
2839 dma_unmap_len(&txq->meta[i], len),
2840 DMA_BIDIRECTIONAL);
2841 txq->meta[i].flags = 0;
2842 }
2843 }
2844 EXPORT_SYMBOL(il_cmd_queue_unmap);
2845
2846 /*
2847 * il_cmd_queue_free - Deallocate DMA queue.
2848 *
2849 * Empty queue by removing and destroying all BD's.
2850 * Free all buffers.
2851 * 0-fill, but do not free "txq" descriptor structure.
2852 */
2853 void
2854 il_cmd_queue_free(struct il_priv *il)
2855 {
2856 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2857 struct device *dev = &il->pci_dev->dev;
2858 int i;
2859
2860 il_cmd_queue_unmap(il);
2861
2862 /* De-alloc array of command/tx buffers */
2863 if (txq->cmd) {
2864 for (i = 0; i <= TFD_CMD_SLOTS; i++)
2865 kfree(txq->cmd[i]);
2866 }
2867
2868 /* De-alloc circular buffer of TFDs */
2869 if (txq->q.n_bd)
2870 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2871 txq->tfds, txq->q.dma_addr);
2872
2873 /* deallocate arrays */
2874 kfree(txq->cmd);
2875 kfree(txq->meta);
2876 txq->cmd = NULL;
2877 txq->meta = NULL;
2878
2879 /* 0-fill queue descriptor structure */
2880 memset(txq, 0, sizeof(*txq));
2881 }
2882 EXPORT_SYMBOL(il_cmd_queue_free);
2883
2884 /*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
2885 * DMA services
2886 *
2887 * Theory of operation
2888 *
2889 * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
2890 * of buffer descriptors, each of which points to one or more data buffers for
2891 * the device to read from or fill. Driver and device exchange status of each
2892 * queue via "read" and "write" pointers. Driver keeps minimum of 2 empty
2893 * entries in each circular buffer, to protect against confusing empty and full
2894 * queue states.
2895 *
2896 * The device reads or writes the data in the queues via the device's several
2897 * DMA/FIFO channels. Each queue is mapped to a single DMA channel.
2898 *
2899 * For Tx queue, there are low mark and high mark limits. If, after queuing
2900 * the packet for Tx, free space become < low mark, Tx queue stopped. When
2901 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
2902 * Tx queue resumed.
2903 *
2904 * See more detailed info in 4965.h.
2905 ***************************************************/
2906
2907 int
2908 il_queue_space(const struct il_queue *q)
2909 {
2910 int s = q->read_ptr - q->write_ptr;
2911
2912 if (q->read_ptr > q->write_ptr)
2913 s -= q->n_bd;
2914
2915 if (s <= 0)
2916 s += q->n_win;
2917 /* keep some reserve to not confuse empty and full situations */
2918 s -= 2;
2919 if (s < 0)
2920 s = 0;
2921 return s;
2922 }
2923 EXPORT_SYMBOL(il_queue_space);
2924
2925
2926 /*
2927 * il_queue_init - Initialize queue's high/low-water and read/write idxes
2928 */
2929 static int
2930 il_queue_init(struct il_priv *il, struct il_queue *q, int slots, u32 id)
2931 {
2932 /*
2933 * TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
2934 * il_queue_inc_wrap and il_queue_dec_wrap are broken.
2935 */
2936 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
2937 /* FIXME: remove q->n_bd */
2938 q->n_bd = TFD_QUEUE_SIZE_MAX;
2939
2940 q->n_win = slots;
2941 q->id = id;
2942
2943 /* slots_must be power-of-two size, otherwise
2944 * il_get_cmd_idx is broken. */
2945 BUG_ON(!is_power_of_2(slots));
2946
2947 q->low_mark = q->n_win / 4;
2948 if (q->low_mark < 4)
2949 q->low_mark = 4;
2950
2951 q->high_mark = q->n_win / 8;
2952 if (q->high_mark < 2)
2953 q->high_mark = 2;
2954
2955 q->write_ptr = q->read_ptr = 0;
2956
2957 return 0;
2958 }
2959
2960 /*
2961 * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
2962 */
2963 static int
2964 il_tx_queue_alloc(struct il_priv *il, struct il_tx_queue *txq, u32 id)
2965 {
2966 struct device *dev = &il->pci_dev->dev;
2967 size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX;
2968
2969 /* Driver ilate data, only for Tx (not command) queues,
2970 * not shared with device. */
2971 if (id != il->cmd_queue) {
2972 txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX,
2973 sizeof(struct sk_buff *),
2974 GFP_KERNEL);
2975 if (!txq->skbs) {
2976 IL_ERR("Fail to alloc skbs\n");
2977 goto error;
2978 }
2979 } else
2980 txq->skbs = NULL;
2981
2982 /* Circular buffer of transmit frame descriptors (TFDs),
2983 * shared with device */
2984 txq->tfds =
2985 dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr, GFP_KERNEL);
2986 if (!txq->tfds)
2987 goto error;
2988
2989 txq->q.id = id;
2990
2991 return 0;
2992
2993 error:
2994 kfree(txq->skbs);
2995 txq->skbs = NULL;
2996
2997 return -ENOMEM;
2998 }
2999
3000 /*
3001 * il_tx_queue_init - Allocate and initialize one tx/cmd queue
3002 */
3003 int
3004 il_tx_queue_init(struct il_priv *il, u32 txq_id)
3005 {
3006 int i, len, ret;
3007 int slots, actual_slots;
3008 struct il_tx_queue *txq = &il->txq[txq_id];
3009
3010 /*
3011 * Alloc buffer array for commands (Tx or other types of commands).
3012 * For the command queue (#4/#9), allocate command space + one big
3013 * command for scan, since scan command is very huge; the system will
3014 * not have two scans at the same time, so only one is needed.
3015 * For normal Tx queues (all other queues), no super-size command
3016 * space is needed.
3017 */
3018 if (txq_id == il->cmd_queue) {
3019 slots = TFD_CMD_SLOTS;
3020 actual_slots = slots + 1;
3021 } else {
3022 slots = TFD_TX_CMD_SLOTS;
3023 actual_slots = slots;
3024 }
3025
3026 txq->meta =
3027 kcalloc(actual_slots, sizeof(struct il_cmd_meta), GFP_KERNEL);
3028 txq->cmd =
3029 kcalloc(actual_slots, sizeof(struct il_device_cmd *), GFP_KERNEL);
3030
3031 if (!txq->meta || !txq->cmd)
3032 goto out_free_arrays;
3033
3034 len = sizeof(struct il_device_cmd);
3035 for (i = 0; i < actual_slots; i++) {
3036 /* only happens for cmd queue */
3037 if (i == slots)
3038 len = IL_MAX_CMD_SIZE;
3039
3040 txq->cmd[i] = kmalloc(len, GFP_KERNEL);
3041 if (!txq->cmd[i])
3042 goto err;
3043 }
3044
3045 /* Alloc driver data array and TFD circular buffer */
3046 ret = il_tx_queue_alloc(il, txq, txq_id);
3047 if (ret)
3048 goto err;
3049
3050 txq->need_update = 0;
3051
3052 /*
3053 * For the default queues 0-3, set up the swq_id
3054 * already -- all others need to get one later
3055 * (if they need one at all).
3056 */
3057 if (txq_id < 4)
3058 il_set_swq_id(txq, txq_id, txq_id);
3059
3060 /* Initialize queue's high/low-water marks, and head/tail idxes */
3061 il_queue_init(il, &txq->q, slots, txq_id);
3062
3063 /* Tell device where to find queue */
3064 il->ops->txq_init(il, txq);
3065
3066 return 0;
3067 err:
3068 for (i = 0; i < actual_slots; i++)
3069 kfree(txq->cmd[i]);
3070 out_free_arrays:
3071 kfree(txq->meta);
3072 txq->meta = NULL;
3073 kfree(txq->cmd);
3074 txq->cmd = NULL;
3075
3076 return -ENOMEM;
3077 }
3078 EXPORT_SYMBOL(il_tx_queue_init);
3079
3080 void
3081 il_tx_queue_reset(struct il_priv *il, u32 txq_id)
3082 {
3083 int slots, actual_slots;
3084 struct il_tx_queue *txq = &il->txq[txq_id];
3085
3086 if (txq_id == il->cmd_queue) {
3087 slots = TFD_CMD_SLOTS;
3088 actual_slots = TFD_CMD_SLOTS + 1;
3089 } else {
3090 slots = TFD_TX_CMD_SLOTS;
3091 actual_slots = TFD_TX_CMD_SLOTS;
3092 }
3093
3094 memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots);
3095 txq->need_update = 0;
3096
3097 /* Initialize queue's high/low-water marks, and head/tail idxes */
3098 il_queue_init(il, &txq->q, slots, txq_id);
3099
3100 /* Tell device where to find queue */
3101 il->ops->txq_init(il, txq);
3102 }
3103 EXPORT_SYMBOL(il_tx_queue_reset);
3104
3105 /*************** HOST COMMAND QUEUE FUNCTIONS *****/
3106
3107 /*
3108 * il_enqueue_hcmd - enqueue a uCode command
3109 * @il: device ilate data point
3110 * @cmd: a point to the ucode command structure
3111 *
3112 * The function returns < 0 values to indicate the operation is
3113 * failed. On success, it turns the idx (> 0) of command in the
3114 * command queue.
3115 */
3116 int
3117 il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
3118 {
3119 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3120 struct il_queue *q = &txq->q;
3121 struct il_device_cmd *out_cmd;
3122 struct il_cmd_meta *out_meta;
3123 dma_addr_t phys_addr;
3124 unsigned long flags;
3125 u8 *out_payload;
3126 u32 idx;
3127 u16 fix_size;
3128
3129 cmd->len = il->ops->get_hcmd_size(cmd->id, cmd->len);
3130 fix_size = (u16) (cmd->len + sizeof(out_cmd->hdr));
3131
3132 /* If any of the command structures end up being larger than
3133 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
3134 * we will need to increase the size of the TFD entries
3135 * Also, check to see if command buffer should not exceed the size
3136 * of device_cmd and max_cmd_size. */
3137 BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
3138 !(cmd->flags & CMD_SIZE_HUGE));
3139 BUG_ON(fix_size > IL_MAX_CMD_SIZE);
3140
3141 if (il_is_rfkill(il) || il_is_ctkill(il)) {
3142 IL_WARN("Not sending command - %s KILL\n",
3143 il_is_rfkill(il) ? "RF" : "CT");
3144 return -EIO;
3145 }
3146
3147 spin_lock_irqsave(&il->hcmd_lock, flags);
3148
3149 if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
3150 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3151
3152 IL_ERR("Restarting adapter due to command queue full\n");
3153 queue_work(il->workqueue, &il->restart);
3154 return -ENOSPC;
3155 }
3156
3157 idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
3158 out_cmd = txq->cmd[idx];
3159 out_meta = &txq->meta[idx];
3160
3161 /* The payload is in the same place in regular and huge
3162 * command buffers, but we need to let the compiler know when
3163 * we're using a larger payload buffer to avoid "field-
3164 * spanning write" warnings at run-time for huge commands.
3165 */
3166 if (cmd->flags & CMD_SIZE_HUGE)
3167 out_payload = ((struct il_device_cmd_huge *)out_cmd)->cmd.payload;
3168 else
3169 out_payload = out_cmd->cmd.payload;
3170
3171 if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
3172 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3173 return -ENOSPC;
3174 }
3175
3176 memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
3177 out_meta->flags = cmd->flags | CMD_MAPPED;
3178 if (cmd->flags & CMD_WANT_SKB)
3179 out_meta->source = cmd;
3180 if (cmd->flags & CMD_ASYNC)
3181 out_meta->callback = cmd->callback;
3182
3183 out_cmd->hdr.cmd = cmd->id;
3184 memcpy(out_payload, cmd->data, cmd->len);
3185
3186 /* At this point, the out_cmd now has all of the incoming cmd
3187 * information */
3188
3189 out_cmd->hdr.flags = 0;
3190 out_cmd->hdr.sequence =
3191 cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) | IDX_TO_SEQ(q->write_ptr));
3192 if (cmd->flags & CMD_SIZE_HUGE)
3193 out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
3194
3195 #ifdef CONFIG_IWLEGACY_DEBUG
3196 switch (out_cmd->hdr.cmd) {
3197 case C_TX_LINK_QUALITY_CMD:
3198 case C_SENSITIVITY:
3199 D_HC_DUMP("Sending command %s (#%x), seq: 0x%04X, "
3200 "%d bytes at %d[%d]:%d\n",
3201 il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3202 le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3203 q->write_ptr, idx, il->cmd_queue);
3204 break;
3205 default:
3206 D_HC("Sending command %s (#%x), seq: 0x%04X, "
3207 "%d bytes at %d[%d]:%d\n",
3208 il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3209 le16_to_cpu(out_cmd->hdr.sequence), fix_size, q->write_ptr,
3210 idx, il->cmd_queue);
3211 }
3212 #endif
3213
3214 phys_addr = dma_map_single(&il->pci_dev->dev, &out_cmd->hdr, fix_size,
3215 DMA_BIDIRECTIONAL);
3216 if (unlikely(dma_mapping_error(&il->pci_dev->dev, phys_addr))) {
3217 idx = -ENOMEM;
3218 goto out;
3219 }
3220 dma_unmap_addr_set(out_meta, mapping, phys_addr);
3221 dma_unmap_len_set(out_meta, len, fix_size);
3222
3223 txq->need_update = 1;
3224
3225 if (il->ops->txq_update_byte_cnt_tbl)
3226 /* Set up entry in queue's byte count circular buffer */
3227 il->ops->txq_update_byte_cnt_tbl(il, txq, 0);
3228
3229 il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, fix_size, 1,
3230 U32_PAD(cmd->len));
3231
3232 /* Increment and update queue's write idx */
3233 q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
3234 il_txq_update_write_ptr(il, txq);
3235
3236 out:
3237 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3238 return idx;
3239 }
3240
3241 /*
3242 * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
3243 *
3244 * When FW advances 'R' idx, all entries between old and new 'R' idx
3245 * need to be reclaimed. As result, some free space forms. If there is
3246 * enough free space (> low mark), wake the stack that feeds us.
3247 */
3248 static void
3249 il_hcmd_queue_reclaim(struct il_priv *il, int txq_id, int idx, int cmd_idx)
3250 {
3251 struct il_tx_queue *txq = &il->txq[txq_id];
3252 struct il_queue *q = &txq->q;
3253 int nfreed = 0;
3254
3255 if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
3256 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
3257 "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
3258 q->write_ptr, q->read_ptr);
3259 return;
3260 }
3261
3262 for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
3263 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3264
3265 if (nfreed++ > 0) {
3266 IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx,
3267 q->write_ptr, q->read_ptr);
3268 queue_work(il->workqueue, &il->restart);
3269 }
3270
3271 }
3272 }
3273
3274 /*
3275 * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3276 * @rxb: Rx buffer to reclaim
3277 *
3278 * If an Rx buffer has an async callback associated with it the callback
3279 * will be executed. The attached skb (if present) will only be freed
3280 * if the callback returns 1
3281 */
3282 void
3283 il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb)
3284 {
3285 struct il_rx_pkt *pkt = rxb_addr(rxb);
3286 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3287 int txq_id = SEQ_TO_QUEUE(sequence);
3288 int idx = SEQ_TO_IDX(sequence);
3289 int cmd_idx;
3290 bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3291 struct il_device_cmd *cmd;
3292 struct il_cmd_meta *meta;
3293 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3294 unsigned long flags;
3295
3296 /* If a Tx command is being handled and it isn't in the actual
3297 * command queue then there a command routing bug has been introduced
3298 * in the queue management code. */
3299 if (WARN
3300 (txq_id != il->cmd_queue,
3301 "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n",
3302 txq_id, il->cmd_queue, sequence, il->txq[il->cmd_queue].q.read_ptr,
3303 il->txq[il->cmd_queue].q.write_ptr)) {
3304 il_print_hex_error(il, pkt, 32);
3305 return;
3306 }
3307
3308 cmd_idx = il_get_cmd_idx(&txq->q, idx, huge);
3309 cmd = txq->cmd[cmd_idx];
3310 meta = &txq->meta[cmd_idx];
3311
3312 txq->time_stamp = jiffies;
3313
3314 dma_unmap_single(&il->pci_dev->dev, dma_unmap_addr(meta, mapping),
3315 dma_unmap_len(meta, len), DMA_BIDIRECTIONAL);
3316
3317 /* Input error checking is done when commands are added to queue. */
3318 if (meta->flags & CMD_WANT_SKB) {
3319 meta->source->reply_page = (unsigned long)rxb_addr(rxb);
3320 rxb->page = NULL;
3321 } else if (meta->callback)
3322 meta->callback(il, cmd, pkt);
3323
3324 spin_lock_irqsave(&il->hcmd_lock, flags);
3325
3326 il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx);
3327
3328 if (!(meta->flags & CMD_ASYNC)) {
3329 clear_bit(S_HCMD_ACTIVE, &il->status);
3330 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
3331 il_get_cmd_string(cmd->hdr.cmd));
3332 wake_up(&il->wait_command_queue);
3333 }
3334
3335 /* Mark as unmapped */
3336 meta->flags = 0;
3337
3338 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3339 }
3340 EXPORT_SYMBOL(il_tx_cmd_complete);
3341
3342 MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
3343 MODULE_VERSION(IWLWIFI_VERSION);
3344 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
3345 MODULE_LICENSE("GPL");
3346
3347 /*
3348 * set bt_coex_active to true, uCode will do kill/defer
3349 * every time the priority line is asserted (BT is sending signals on the
3350 * priority line in the PCIx).
3351 * set bt_coex_active to false, uCode will ignore the BT activity and
3352 * perform the normal operation
3353 *
3354 * User might experience transmit issue on some platform due to WiFi/BT
3355 * co-exist problem. The possible behaviors are:
3356 * Able to scan and finding all the available AP
3357 * Not able to associate with any AP
3358 * On those platforms, WiFi communication can be restored by set
3359 * "bt_coex_active" module parameter to "false"
3360 *
3361 * default: bt_coex_active = true (BT_COEX_ENABLE)
3362 */
3363 static bool bt_coex_active = true;
3364 module_param(bt_coex_active, bool, 0444);
3365 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
3366
3367 u32 il_debug_level;
3368 EXPORT_SYMBOL(il_debug_level);
3369
3370 const u8 il_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
3371 EXPORT_SYMBOL(il_bcast_addr);
3372
3373 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
3374 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
3375 static void
3376 il_init_ht_hw_capab(const struct il_priv *il,
3377 struct ieee80211_sta_ht_cap *ht_info,
3378 enum nl80211_band band)
3379 {
3380 u16 max_bit_rate = 0;
3381 u8 rx_chains_num = il->hw_params.rx_chains_num;
3382 u8 tx_chains_num = il->hw_params.tx_chains_num;
3383
3384 ht_info->cap = 0;
3385 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
3386
3387 ht_info->ht_supported = true;
3388
3389 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
3390 max_bit_rate = MAX_BIT_RATE_20_MHZ;
3391 if (il->hw_params.ht40_channel & BIT(band)) {
3392 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
3393 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
3394 ht_info->mcs.rx_mask[4] = 0x01;
3395 max_bit_rate = MAX_BIT_RATE_40_MHZ;
3396 }
3397
3398 if (il->cfg->mod_params->amsdu_size_8K)
3399 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
3400
3401 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3402 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3403
3404 ht_info->mcs.rx_mask[0] = 0xFF;
3405 if (rx_chains_num >= 2)
3406 ht_info->mcs.rx_mask[1] = 0xFF;
3407 if (rx_chains_num >= 3)
3408 ht_info->mcs.rx_mask[2] = 0xFF;
3409
3410 /* Highest supported Rx data rate */
3411 max_bit_rate *= rx_chains_num;
3412 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
3413 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
3414
3415 /* Tx MCS capabilities */
3416 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
3417 if (tx_chains_num != rx_chains_num) {
3418 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
3419 ht_info->mcs.tx_params |=
3420 ((tx_chains_num -
3421 1) << IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
3422 }
3423 }
3424
3425 /*
3426 * il_init_geos - Initialize mac80211's geo/channel info based from eeprom
3427 */
3428 int
3429 il_init_geos(struct il_priv *il)
3430 {
3431 struct il_channel_info *ch;
3432 struct ieee80211_supported_band *sband;
3433 struct ieee80211_channel *channels;
3434 struct ieee80211_channel *geo_ch;
3435 struct ieee80211_rate *rates;
3436 int i = 0;
3437 s8 max_tx_power = 0;
3438
3439 if (il->bands[NL80211_BAND_2GHZ].n_bitrates ||
3440 il->bands[NL80211_BAND_5GHZ].n_bitrates) {
3441 D_INFO("Geography modes already initialized.\n");
3442 set_bit(S_GEO_CONFIGURED, &il->status);
3443 return 0;
3444 }
3445
3446 channels =
3447 kcalloc(il->channel_count, sizeof(struct ieee80211_channel),
3448 GFP_KERNEL);
3449 if (!channels)
3450 return -ENOMEM;
3451
3452 rates = kcalloc(RATE_COUNT_LEGACY, sizeof(*rates), GFP_KERNEL);
3453 if (!rates) {
3454 kfree(channels);
3455 return -ENOMEM;
3456 }
3457
3458 /* 5.2GHz channels start after the 2.4GHz channels */
3459 sband = &il->bands[NL80211_BAND_5GHZ];
3460 sband->channels = &channels[ARRAY_SIZE(il_eeprom_band_1)];
3461 /* just OFDM */
3462 sband->bitrates = &rates[IL_FIRST_OFDM_RATE];
3463 sband->n_bitrates = RATE_COUNT_LEGACY - IL_FIRST_OFDM_RATE;
3464
3465 if (il->cfg->sku & IL_SKU_N)
3466 il_init_ht_hw_capab(il, &sband->ht_cap, NL80211_BAND_5GHZ);
3467
3468 sband = &il->bands[NL80211_BAND_2GHZ];
3469 sband->channels = channels;
3470 /* OFDM & CCK */
3471 sband->bitrates = rates;
3472 sband->n_bitrates = RATE_COUNT_LEGACY;
3473
3474 if (il->cfg->sku & IL_SKU_N)
3475 il_init_ht_hw_capab(il, &sband->ht_cap, NL80211_BAND_2GHZ);
3476
3477 il->ieee_channels = channels;
3478 il->ieee_rates = rates;
3479
3480 for (i = 0; i < il->channel_count; i++) {
3481 ch = &il->channel_info[i];
3482
3483 if (!il_is_channel_valid(ch))
3484 continue;
3485
3486 sband = &il->bands[ch->band];
3487
3488 geo_ch = &sband->channels[sband->n_channels++];
3489
3490 geo_ch->center_freq =
3491 ieee80211_channel_to_frequency(ch->channel, ch->band);
3492 geo_ch->max_power = ch->max_power_avg;
3493 geo_ch->max_antenna_gain = 0xff;
3494 geo_ch->hw_value = ch->channel;
3495
3496 if (il_is_channel_valid(ch)) {
3497 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
3498 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3499
3500 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
3501 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3502
3503 if (ch->flags & EEPROM_CHANNEL_RADAR)
3504 geo_ch->flags |= IEEE80211_CHAN_RADAR;
3505
3506 geo_ch->flags |= ch->ht40_extension_channel;
3507
3508 if (ch->max_power_avg > max_tx_power)
3509 max_tx_power = ch->max_power_avg;
3510 } else {
3511 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
3512 }
3513
3514 D_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n", ch->channel,
3515 geo_ch->center_freq,
3516 il_is_channel_a_band(ch) ? "5.2" : "2.4",
3517 geo_ch->
3518 flags & IEEE80211_CHAN_DISABLED ? "restricted" : "valid",
3519 geo_ch->flags);
3520 }
3521
3522 il->tx_power_device_lmt = max_tx_power;
3523 il->tx_power_user_lmt = max_tx_power;
3524 il->tx_power_next = max_tx_power;
3525
3526 if (il->bands[NL80211_BAND_5GHZ].n_channels == 0 &&
3527 (il->cfg->sku & IL_SKU_A)) {
3528 IL_INFO("Incorrectly detected BG card as ABG. "
3529 "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
3530 il->pci_dev->device, il->pci_dev->subsystem_device);
3531 il->cfg->sku &= ~IL_SKU_A;
3532 }
3533
3534 IL_INFO("Tunable channels: %d 802.11bg, %d 802.11a channels\n",
3535 il->bands[NL80211_BAND_2GHZ].n_channels,
3536 il->bands[NL80211_BAND_5GHZ].n_channels);
3537
3538 set_bit(S_GEO_CONFIGURED, &il->status);
3539
3540 return 0;
3541 }
3542 EXPORT_SYMBOL(il_init_geos);
3543
3544 /*
3545 * il_free_geos - undo allocations in il_init_geos
3546 */
3547 void
3548 il_free_geos(struct il_priv *il)
3549 {
3550 kfree(il->ieee_channels);
3551 kfree(il->ieee_rates);
3552 clear_bit(S_GEO_CONFIGURED, &il->status);
3553 }
3554 EXPORT_SYMBOL(il_free_geos);
3555
3556 static bool
3557 il_is_channel_extension(struct il_priv *il, enum nl80211_band band,
3558 u16 channel, u8 extension_chan_offset)
3559 {
3560 const struct il_channel_info *ch_info;
3561
3562 ch_info = il_get_channel_info(il, band, channel);
3563 if (!il_is_channel_valid(ch_info))
3564 return false;
3565
3566 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
3567 return !(ch_info->
3568 ht40_extension_channel & IEEE80211_CHAN_NO_HT40PLUS);
3569 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
3570 return !(ch_info->
3571 ht40_extension_channel & IEEE80211_CHAN_NO_HT40MINUS);
3572
3573 return false;
3574 }
3575
3576 bool
3577 il_is_ht40_tx_allowed(struct il_priv *il, struct ieee80211_sta_ht_cap *ht_cap)
3578 {
3579 if (!il->ht.enabled || !il->ht.is_40mhz)
3580 return false;
3581
3582 /*
3583 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
3584 * the bit will not set if it is pure 40MHz case
3585 */
3586 if (ht_cap && !ht_cap->ht_supported)
3587 return false;
3588
3589 #ifdef CONFIG_IWLEGACY_DEBUGFS
3590 if (il->disable_ht40)
3591 return false;
3592 #endif
3593
3594 return il_is_channel_extension(il, il->band,
3595 le16_to_cpu(il->staging.channel),
3596 il->ht.extension_chan_offset);
3597 }
3598 EXPORT_SYMBOL(il_is_ht40_tx_allowed);
3599
3600 static u16 noinline
3601 il_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
3602 {
3603 u16 new_val;
3604 u16 beacon_factor;
3605
3606 /*
3607 * If mac80211 hasn't given us a beacon interval, program
3608 * the default into the device.
3609 */
3610 if (!beacon_val)
3611 return DEFAULT_BEACON_INTERVAL;
3612
3613 /*
3614 * If the beacon interval we obtained from the peer
3615 * is too large, we'll have to wake up more often
3616 * (and in IBSS case, we'll beacon too much)
3617 *
3618 * For example, if max_beacon_val is 4096, and the
3619 * requested beacon interval is 7000, we'll have to
3620 * use 3500 to be able to wake up on the beacons.
3621 *
3622 * This could badly influence beacon detection stats.
3623 */
3624
3625 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
3626 new_val = beacon_val / beacon_factor;
3627
3628 if (!new_val)
3629 new_val = max_beacon_val;
3630
3631 return new_val;
3632 }
3633
3634 int
3635 il_send_rxon_timing(struct il_priv *il)
3636 {
3637 u64 tsf;
3638 s32 interval_tm, rem;
3639 struct ieee80211_conf *conf = NULL;
3640 u16 beacon_int;
3641 struct ieee80211_vif *vif = il->vif;
3642
3643 conf = &il->hw->conf;
3644
3645 lockdep_assert_held(&il->mutex);
3646
3647 memset(&il->timing, 0, sizeof(struct il_rxon_time_cmd));
3648
3649 il->timing.timestamp = cpu_to_le64(il->timestamp);
3650 il->timing.listen_interval = cpu_to_le16(conf->listen_interval);
3651
3652 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
3653
3654 /*
3655 * TODO: For IBSS we need to get atim_win from mac80211,
3656 * for now just always use 0
3657 */
3658 il->timing.atim_win = 0;
3659
3660 beacon_int =
3661 il_adjust_beacon_interval(beacon_int,
3662 il->hw_params.max_beacon_itrvl *
3663 TIME_UNIT);
3664 il->timing.beacon_interval = cpu_to_le16(beacon_int);
3665
3666 tsf = il->timestamp; /* tsf is modifed by do_div: copy it */
3667 interval_tm = beacon_int * TIME_UNIT;
3668 rem = do_div(tsf, interval_tm);
3669 il->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
3670
3671 il->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ? : 1) : 1;
3672
3673 D_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
3674 le16_to_cpu(il->timing.beacon_interval),
3675 le32_to_cpu(il->timing.beacon_init_val),
3676 le16_to_cpu(il->timing.atim_win));
3677
3678 return il_send_cmd_pdu(il, C_RXON_TIMING, sizeof(il->timing),
3679 &il->timing);
3680 }
3681 EXPORT_SYMBOL(il_send_rxon_timing);
3682
3683 void
3684 il_set_rxon_hwcrypto(struct il_priv *il, int hw_decrypt)
3685 {
3686 struct il_rxon_cmd *rxon = &il->staging;
3687
3688 if (hw_decrypt)
3689 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
3690 else
3691 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
3692
3693 }
3694 EXPORT_SYMBOL(il_set_rxon_hwcrypto);
3695
3696 /* validate RXON structure is valid */
3697 int
3698 il_check_rxon_cmd(struct il_priv *il)
3699 {
3700 struct il_rxon_cmd *rxon = &il->staging;
3701 bool error = false;
3702
3703 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
3704 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
3705 IL_WARN("check 2.4G: wrong narrow\n");
3706 error = true;
3707 }
3708 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
3709 IL_WARN("check 2.4G: wrong radar\n");
3710 error = true;
3711 }
3712 } else {
3713 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
3714 IL_WARN("check 5.2G: not short slot!\n");
3715 error = true;
3716 }
3717 if (rxon->flags & RXON_FLG_CCK_MSK) {
3718 IL_WARN("check 5.2G: CCK!\n");
3719 error = true;
3720 }
3721 }
3722 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
3723 IL_WARN("mac/bssid mcast!\n");
3724 error = true;
3725 }
3726
3727 /* make sure basic rates 6Mbps and 1Mbps are supported */
3728 if ((rxon->ofdm_basic_rates & RATE_6M_MASK) == 0 &&
3729 (rxon->cck_basic_rates & RATE_1M_MASK) == 0) {
3730 IL_WARN("neither 1 nor 6 are basic\n");
3731 error = true;
3732 }
3733
3734 if (le16_to_cpu(rxon->assoc_id) > 2007) {
3735 IL_WARN("aid > 2007\n");
3736 error = true;
3737 }
3738
3739 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) ==
3740 (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
3741 IL_WARN("CCK and short slot\n");
3742 error = true;
3743 }
3744
3745 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) ==
3746 (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
3747 IL_WARN("CCK and auto detect");
3748 error = true;
3749 }
3750
3751 if ((rxon->
3752 flags & (RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK)) ==
3753 RXON_FLG_TGG_PROTECT_MSK) {
3754 IL_WARN("TGg but no auto-detect\n");
3755 error = true;
3756 }
3757
3758 if (error)
3759 IL_WARN("Tuning to channel %d\n", le16_to_cpu(rxon->channel));
3760
3761 if (error) {
3762 IL_ERR("Invalid RXON\n");
3763 return -EINVAL;
3764 }
3765 return 0;
3766 }
3767 EXPORT_SYMBOL(il_check_rxon_cmd);
3768
3769 /*
3770 * il_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
3771 * @il: staging_rxon is compared to active_rxon
3772 *
3773 * If the RXON structure is changing enough to require a new tune,
3774 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
3775 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
3776 */
3777 int
3778 il_full_rxon_required(struct il_priv *il)
3779 {
3780 const struct il_rxon_cmd *staging = &il->staging;
3781 const struct il_rxon_cmd *active = &il->active;
3782
3783 #define CHK(cond) \
3784 if ((cond)) { \
3785 D_INFO("need full RXON - " #cond "\n"); \
3786 return 1; \
3787 }
3788
3789 #define CHK_NEQ(c1, c2) \
3790 if ((c1) != (c2)) { \
3791 D_INFO("need full RXON - " \
3792 #c1 " != " #c2 " - %d != %d\n", \
3793 (c1), (c2)); \
3794 return 1; \
3795 }
3796
3797 /* These items are only settable from the full RXON command */
3798 CHK(!il_is_associated(il));
3799 CHK(!ether_addr_equal_64bits(staging->bssid_addr, active->bssid_addr));
3800 CHK(!ether_addr_equal_64bits(staging->node_addr, active->node_addr));
3801 CHK(!ether_addr_equal_64bits(staging->wlap_bssid_addr,
3802 active->wlap_bssid_addr));
3803 CHK_NEQ(staging->dev_type, active->dev_type);
3804 CHK_NEQ(staging->channel, active->channel);
3805 CHK_NEQ(staging->air_propagation, active->air_propagation);
3806 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
3807 active->ofdm_ht_single_stream_basic_rates);
3808 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
3809 active->ofdm_ht_dual_stream_basic_rates);
3810 CHK_NEQ(staging->assoc_id, active->assoc_id);
3811
3812 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
3813 * be updated with the RXON_ASSOC command -- however only some
3814 * flag transitions are allowed using RXON_ASSOC */
3815
3816 /* Check if we are not switching bands */
3817 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
3818 active->flags & RXON_FLG_BAND_24G_MSK);
3819
3820 /* Check if we are switching association toggle */
3821 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
3822 active->filter_flags & RXON_FILTER_ASSOC_MSK);
3823
3824 #undef CHK
3825 #undef CHK_NEQ
3826
3827 return 0;
3828 }
3829 EXPORT_SYMBOL(il_full_rxon_required);
3830
3831 u8
3832 il_get_lowest_plcp(struct il_priv *il)
3833 {
3834 /*
3835 * Assign the lowest rate -- should really get this from
3836 * the beacon skb from mac80211.
3837 */
3838 if (il->staging.flags & RXON_FLG_BAND_24G_MSK)
3839 return RATE_1M_PLCP;
3840 else
3841 return RATE_6M_PLCP;
3842 }
3843 EXPORT_SYMBOL(il_get_lowest_plcp);
3844
3845 static void
3846 _il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3847 {
3848 struct il_rxon_cmd *rxon = &il->staging;
3849
3850 if (!il->ht.enabled) {
3851 rxon->flags &=
3852 ~(RXON_FLG_CHANNEL_MODE_MSK |
3853 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | RXON_FLG_HT40_PROT_MSK
3854 | RXON_FLG_HT_PROT_MSK);
3855 return;
3856 }
3857
3858 rxon->flags |=
3859 cpu_to_le32(il->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
3860
3861 /* Set up channel bandwidth:
3862 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
3863 /* clear the HT channel mode before set the mode */
3864 rxon->flags &=
3865 ~(RXON_FLG_CHANNEL_MODE_MSK | RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3866 if (il_is_ht40_tx_allowed(il, NULL)) {
3867 /* pure ht40 */
3868 if (il->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
3869 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
3870 /* Note: control channel is opposite of extension channel */
3871 switch (il->ht.extension_chan_offset) {
3872 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3873 rxon->flags &=
3874 ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3875 break;
3876 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3877 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3878 break;
3879 }
3880 } else {
3881 /* Note: control channel is opposite of extension channel */
3882 switch (il->ht.extension_chan_offset) {
3883 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3884 rxon->flags &=
3885 ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3886 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3887 break;
3888 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3889 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3890 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3891 break;
3892 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3893 default:
3894 /* channel location only valid if in Mixed mode */
3895 IL_ERR("invalid extension channel offset\n");
3896 break;
3897 }
3898 }
3899 } else {
3900 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
3901 }
3902
3903 if (il->ops->set_rxon_chain)
3904 il->ops->set_rxon_chain(il);
3905
3906 D_ASSOC("rxon flags 0x%X operation mode :0x%X "
3907 "extension channel offset 0x%x\n", le32_to_cpu(rxon->flags),
3908 il->ht.protection, il->ht.extension_chan_offset);
3909 }
3910
3911 void
3912 il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3913 {
3914 _il_set_rxon_ht(il, ht_conf);
3915 }
3916 EXPORT_SYMBOL(il_set_rxon_ht);
3917
3918 /* Return valid, unused, channel for a passive scan to reset the RF */
3919 u8
3920 il_get_single_channel_number(struct il_priv *il, enum nl80211_band band)
3921 {
3922 const struct il_channel_info *ch_info;
3923 int i;
3924 u8 channel = 0;
3925 u8 min, max;
3926
3927 if (band == NL80211_BAND_5GHZ) {
3928 min = 14;
3929 max = il->channel_count;
3930 } else {
3931 min = 0;
3932 max = 14;
3933 }
3934
3935 for (i = min; i < max; i++) {
3936 channel = il->channel_info[i].channel;
3937 if (channel == le16_to_cpu(il->staging.channel))
3938 continue;
3939
3940 ch_info = il_get_channel_info(il, band, channel);
3941 if (il_is_channel_valid(ch_info))
3942 break;
3943 }
3944
3945 return channel;
3946 }
3947 EXPORT_SYMBOL(il_get_single_channel_number);
3948
3949 /*
3950 * il_set_rxon_channel - Set the band and channel values in staging RXON
3951 * @ch: requested channel as a pointer to struct ieee80211_channel
3952
3953 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
3954 * in the staging RXON flag structure based on the ch->band
3955 */
3956 int
3957 il_set_rxon_channel(struct il_priv *il, struct ieee80211_channel *ch)
3958 {
3959 enum nl80211_band band = ch->band;
3960 u16 channel = ch->hw_value;
3961
3962 if (le16_to_cpu(il->staging.channel) == channel && il->band == band)
3963 return 0;
3964
3965 il->staging.channel = cpu_to_le16(channel);
3966 if (band == NL80211_BAND_5GHZ)
3967 il->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
3968 else
3969 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3970
3971 il->band = band;
3972
3973 D_INFO("Staging channel set to %d [%d]\n", channel, band);
3974
3975 return 0;
3976 }
3977 EXPORT_SYMBOL(il_set_rxon_channel);
3978
3979 void
3980 il_set_flags_for_band(struct il_priv *il, enum nl80211_band band,
3981 struct ieee80211_vif *vif)
3982 {
3983 if (band == NL80211_BAND_5GHZ) {
3984 il->staging.flags &=
3985 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
3986 RXON_FLG_CCK_MSK);
3987 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3988 } else {
3989 /* Copied from il_post_associate() */
3990 if (vif && vif->bss_conf.use_short_slot)
3991 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3992 else
3993 il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3994
3995 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3996 il->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
3997 il->staging.flags &= ~RXON_FLG_CCK_MSK;
3998 }
3999 }
4000 EXPORT_SYMBOL(il_set_flags_for_band);
4001
4002 /*
4003 * initialize rxon structure with default values from eeprom
4004 */
4005 void
4006 il_connection_init_rx_config(struct il_priv *il)
4007 {
4008 const struct il_channel_info *ch_info;
4009
4010 memset(&il->staging, 0, sizeof(il->staging));
4011
4012 switch (il->iw_mode) {
4013 case NL80211_IFTYPE_UNSPECIFIED:
4014 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4015 break;
4016 case NL80211_IFTYPE_STATION:
4017 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4018 il->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
4019 break;
4020 case NL80211_IFTYPE_ADHOC:
4021 il->staging.dev_type = RXON_DEV_TYPE_IBSS;
4022 il->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
4023 il->staging.filter_flags =
4024 RXON_FILTER_BCON_AWARE_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
4025 break;
4026 default:
4027 IL_ERR("Unsupported interface type %d\n", il->vif->type);
4028 return;
4029 }
4030
4031 #if 0
4032 /* TODO: Figure out when short_preamble would be set and cache from
4033 * that */
4034 if (!hw_to_local(il->hw)->short_preamble)
4035 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
4036 else
4037 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
4038 #endif
4039
4040 ch_info =
4041 il_get_channel_info(il, il->band, le16_to_cpu(il->active.channel));
4042
4043 if (!ch_info)
4044 ch_info = &il->channel_info[0];
4045
4046 il->staging.channel = cpu_to_le16(ch_info->channel);
4047 il->band = ch_info->band;
4048
4049 il_set_flags_for_band(il, il->band, il->vif);
4050
4051 il->staging.ofdm_basic_rates =
4052 (IL_OFDM_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4053 il->staging.cck_basic_rates =
4054 (IL_CCK_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4055
4056 /* clear both MIX and PURE40 mode flag */
4057 il->staging.flags &=
4058 ~(RXON_FLG_CHANNEL_MODE_MIXED | RXON_FLG_CHANNEL_MODE_PURE_40);
4059 if (il->vif)
4060 memcpy(il->staging.node_addr, il->vif->addr, ETH_ALEN);
4061
4062 il->staging.ofdm_ht_single_stream_basic_rates = 0xff;
4063 il->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
4064 }
4065 EXPORT_SYMBOL(il_connection_init_rx_config);
4066
4067 void
4068 il_set_rate(struct il_priv *il)
4069 {
4070 const struct ieee80211_supported_band *hw = NULL;
4071 struct ieee80211_rate *rate;
4072 int i;
4073
4074 hw = il_get_hw_mode(il, il->band);
4075 if (!hw) {
4076 IL_ERR("Failed to set rate: unable to get hw mode\n");
4077 return;
4078 }
4079
4080 il->active_rate = 0;
4081
4082 for (i = 0; i < hw->n_bitrates; i++) {
4083 rate = &(hw->bitrates[i]);
4084 if (rate->hw_value < RATE_COUNT_LEGACY)
4085 il->active_rate |= (1 << rate->hw_value);
4086 }
4087
4088 D_RATE("Set active_rate = %0x\n", il->active_rate);
4089
4090 il->staging.cck_basic_rates =
4091 (IL_CCK_BASIC_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4092
4093 il->staging.ofdm_basic_rates =
4094 (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4095 }
4096 EXPORT_SYMBOL(il_set_rate);
4097
4098 void
4099 il_chswitch_done(struct il_priv *il, bool is_success)
4100 {
4101 if (test_bit(S_EXIT_PENDING, &il->status))
4102 return;
4103
4104 if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4105 ieee80211_chswitch_done(il->vif, is_success, 0);
4106 }
4107 EXPORT_SYMBOL(il_chswitch_done);
4108
4109 void
4110 il_hdl_csa(struct il_priv *il, struct il_rx_buf *rxb)
4111 {
4112 struct il_rx_pkt *pkt = rxb_addr(rxb);
4113 struct il_csa_notification *csa = &(pkt->u.csa_notif);
4114 struct il_rxon_cmd *rxon = (void *)&il->active;
4115
4116 if (!test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4117 return;
4118
4119 if (!le32_to_cpu(csa->status) && csa->channel == il->switch_channel) {
4120 rxon->channel = csa->channel;
4121 il->staging.channel = csa->channel;
4122 D_11H("CSA notif: channel %d\n", le16_to_cpu(csa->channel));
4123 il_chswitch_done(il, true);
4124 } else {
4125 IL_ERR("CSA notif (fail) : channel %d\n",
4126 le16_to_cpu(csa->channel));
4127 il_chswitch_done(il, false);
4128 }
4129 }
4130 EXPORT_SYMBOL(il_hdl_csa);
4131
4132 #ifdef CONFIG_IWLEGACY_DEBUG
4133 void
4134 il_print_rx_config_cmd(struct il_priv *il)
4135 {
4136 struct il_rxon_cmd *rxon = &il->staging;
4137
4138 D_RADIO("RX CONFIG:\n");
4139 il_print_hex_dump(il, IL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4140 D_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4141 D_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4142 D_RADIO("u32 filter_flags: 0x%08x\n", le32_to_cpu(rxon->filter_flags));
4143 D_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4144 D_RADIO("u8 ofdm_basic_rates: 0x%02x\n", rxon->ofdm_basic_rates);
4145 D_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4146 D_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
4147 D_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
4148 D_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4149 }
4150 EXPORT_SYMBOL(il_print_rx_config_cmd);
4151 #endif
4152 /*
4153 * il_irq_handle_error - called for HW or SW error interrupt from card
4154 */
4155 void
4156 il_irq_handle_error(struct il_priv *il)
4157 {
4158 /* Set the FW error flag -- cleared on il_down */
4159 set_bit(S_FW_ERROR, &il->status);
4160
4161 /* Cancel currently queued command. */
4162 clear_bit(S_HCMD_ACTIVE, &il->status);
4163
4164 IL_ERR("Loaded firmware version: %s\n", il->hw->wiphy->fw_version);
4165
4166 il->ops->dump_nic_error_log(il);
4167 if (il->ops->dump_fh)
4168 il->ops->dump_fh(il, NULL, false);
4169 #ifdef CONFIG_IWLEGACY_DEBUG
4170 if (il_get_debug_level(il) & IL_DL_FW_ERRORS)
4171 il_print_rx_config_cmd(il);
4172 #endif
4173
4174 wake_up(&il->wait_command_queue);
4175
4176 /* Keep the restart process from trying to send host
4177 * commands by clearing the INIT status bit */
4178 clear_bit(S_READY, &il->status);
4179
4180 if (!test_bit(S_EXIT_PENDING, &il->status)) {
4181 IL_DBG(IL_DL_FW_ERRORS,
4182 "Restarting adapter due to uCode error.\n");
4183
4184 if (il->cfg->mod_params->restart_fw)
4185 queue_work(il->workqueue, &il->restart);
4186 }
4187 }
4188 EXPORT_SYMBOL(il_irq_handle_error);
4189
4190 static int
4191 _il_apm_stop_master(struct il_priv *il)
4192 {
4193 int ret = 0;
4194
4195 /* stop device's busmaster DMA activity */
4196 _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
4197
4198 ret =
4199 _il_poll_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
4200 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
4201 if (ret < 0)
4202 IL_WARN("Master Disable Timed Out, 100 usec\n");
4203
4204 D_INFO("stop master\n");
4205
4206 return ret;
4207 }
4208
4209 void
4210 _il_apm_stop(struct il_priv *il)
4211 {
4212 lockdep_assert_held(&il->reg_lock);
4213
4214 D_INFO("Stop card, put in low power state\n");
4215
4216 /* Stop device's DMA activity */
4217 _il_apm_stop_master(il);
4218
4219 /* Reset the entire device */
4220 _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4221
4222 udelay(10);
4223
4224 /*
4225 * Clear "initialization complete" bit to move adapter from
4226 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
4227 */
4228 _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4229 }
4230 EXPORT_SYMBOL(_il_apm_stop);
4231
4232 void
4233 il_apm_stop(struct il_priv *il)
4234 {
4235 unsigned long flags;
4236
4237 spin_lock_irqsave(&il->reg_lock, flags);
4238 _il_apm_stop(il);
4239 spin_unlock_irqrestore(&il->reg_lock, flags);
4240 }
4241 EXPORT_SYMBOL(il_apm_stop);
4242
4243 /*
4244 * Start up NIC's basic functionality after it has been reset
4245 * (e.g. after platform boot, or shutdown via il_apm_stop())
4246 * NOTE: This does not load uCode nor start the embedded processor
4247 */
4248 int
4249 il_apm_init(struct il_priv *il)
4250 {
4251 int ret = 0;
4252 u16 lctl;
4253
4254 D_INFO("Init card's basic functions\n");
4255
4256 /*
4257 * Use "set_bit" below rather than "write", to preserve any hardware
4258 * bits already set by default after reset.
4259 */
4260
4261 /* Disable L0S exit timer (platform NMI Work/Around) */
4262 il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4263 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
4264
4265 /*
4266 * Disable L0s without affecting L1;
4267 * don't wait for ICH L0s (ICH bug W/A)
4268 */
4269 il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4270 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
4271
4272 /* Set FH wait threshold to maximum (HW error during stress W/A) */
4273 il_set_bit(il, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
4274
4275 /*
4276 * Enable HAP INTA (interrupt from management bus) to
4277 * wake device's PCI Express link L1a -> L0s
4278 * NOTE: This is no-op for 3945 (non-existent bit)
4279 */
4280 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
4281 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
4282
4283 /*
4284 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
4285 * Check if BIOS (or OS) enabled L1-ASPM on this device.
4286 * If so (likely), disable L0S, so device moves directly L0->L1;
4287 * costs negligible amount of power savings.
4288 * If not (unlikely), enable L0S, so there is at least some
4289 * power savings, even without L1.
4290 */
4291 if (il->cfg->set_l0s) {
4292 ret = pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
4293 if (!ret && (lctl & PCI_EXP_LNKCTL_ASPM_L1)) {
4294 /* L1-ASPM enabled; disable(!) L0S */
4295 il_set_bit(il, CSR_GIO_REG,
4296 CSR_GIO_REG_VAL_L0S_ENABLED);
4297 D_POWER("L1 Enabled; Disabling L0S\n");
4298 } else {
4299 /* L1-ASPM disabled; enable(!) L0S */
4300 il_clear_bit(il, CSR_GIO_REG,
4301 CSR_GIO_REG_VAL_L0S_ENABLED);
4302 D_POWER("L1 Disabled; Enabling L0S\n");
4303 }
4304 }
4305
4306 /* Configure analog phase-lock-loop before activating to D0A */
4307 if (il->cfg->pll_cfg_val)
4308 il_set_bit(il, CSR_ANA_PLL_CFG,
4309 il->cfg->pll_cfg_val);
4310
4311 /*
4312 * Set "initialization complete" bit to move adapter from
4313 * D0U* --> D0A* (powered-up active) state.
4314 */
4315 il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4316
4317 /*
4318 * Wait for clock stabilization; once stabilized, access to
4319 * device-internal resources is supported, e.g. il_wr_prph()
4320 * and accesses to uCode SRAM.
4321 */
4322 ret =
4323 _il_poll_bit(il, CSR_GP_CNTRL,
4324 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
4325 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
4326 if (ret < 0) {
4327 D_INFO("Failed to init the card\n");
4328 goto out;
4329 }
4330
4331 /*
4332 * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
4333 * BSM (Boostrap State Machine) is only in 3945 and 4965.
4334 *
4335 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
4336 * do not disable clocks. This preserves any hardware bits already
4337 * set by default in "CLK_CTRL_REG" after reset.
4338 */
4339 if (il->cfg->use_bsm)
4340 il_wr_prph(il, APMG_CLK_EN_REG,
4341 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
4342 else
4343 il_wr_prph(il, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
4344 udelay(20);
4345
4346 /* Disable L1-Active */
4347 il_set_bits_prph(il, APMG_PCIDEV_STT_REG,
4348 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
4349
4350 out:
4351 return ret;
4352 }
4353 EXPORT_SYMBOL(il_apm_init);
4354
4355 int
4356 il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
4357 {
4358 int ret;
4359 s8 prev_tx_power;
4360 bool defer;
4361
4362 lockdep_assert_held(&il->mutex);
4363
4364 if (il->tx_power_user_lmt == tx_power && !force)
4365 return 0;
4366
4367 if (!il->ops->send_tx_power)
4368 return -EOPNOTSUPP;
4369
4370 /* 0 dBm mean 1 milliwatt */
4371 if (tx_power < 0) {
4372 IL_WARN("Requested user TXPOWER %d below 1 mW.\n", tx_power);
4373 return -EINVAL;
4374 }
4375
4376 if (tx_power > il->tx_power_device_lmt) {
4377 IL_WARN("Requested user TXPOWER %d above upper limit %d.\n",
4378 tx_power, il->tx_power_device_lmt);
4379 return -EINVAL;
4380 }
4381
4382 if (!il_is_ready_rf(il))
4383 return -EIO;
4384
4385 /* scan complete and commit_rxon use tx_power_next value,
4386 * it always need to be updated for newest request */
4387 il->tx_power_next = tx_power;
4388
4389 /* do not set tx power when scanning or channel changing */
4390 defer = test_bit(S_SCANNING, &il->status) ||
4391 memcmp(&il->active, &il->staging, sizeof(il->staging));
4392 if (defer && !force) {
4393 D_INFO("Deferring tx power set\n");
4394 return 0;
4395 }
4396
4397 prev_tx_power = il->tx_power_user_lmt;
4398 il->tx_power_user_lmt = tx_power;
4399
4400 ret = il->ops->send_tx_power(il);
4401
4402 /* if fail to set tx_power, restore the orig. tx power */
4403 if (ret) {
4404 il->tx_power_user_lmt = prev_tx_power;
4405 il->tx_power_next = prev_tx_power;
4406 }
4407 return ret;
4408 }
4409 EXPORT_SYMBOL(il_set_tx_power);
4410
4411 void
4412 il_send_bt_config(struct il_priv *il)
4413 {
4414 struct il_bt_cmd bt_cmd = {
4415 .lead_time = BT_LEAD_TIME_DEF,
4416 .max_kill = BT_MAX_KILL_DEF,
4417 .kill_ack_mask = 0,
4418 .kill_cts_mask = 0,
4419 };
4420
4421 if (!bt_coex_active)
4422 bt_cmd.flags = BT_COEX_DISABLE;
4423 else
4424 bt_cmd.flags = BT_COEX_ENABLE;
4425
4426 D_INFO("BT coex %s\n",
4427 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
4428
4429 if (il_send_cmd_pdu(il, C_BT_CONFIG, sizeof(struct il_bt_cmd), &bt_cmd))
4430 IL_ERR("failed to send BT Coex Config\n");
4431 }
4432 EXPORT_SYMBOL(il_send_bt_config);
4433
4434 int
4435 il_send_stats_request(struct il_priv *il, u8 flags, bool clear)
4436 {
4437 struct il_stats_cmd stats_cmd = {
4438 .configuration_flags = clear ? IL_STATS_CONF_CLEAR_STATS : 0,
4439 };
4440
4441 if (flags & CMD_ASYNC)
4442 return il_send_cmd_pdu_async(il, C_STATS, sizeof(struct il_stats_cmd),
4443 &stats_cmd, NULL);
4444 else
4445 return il_send_cmd_pdu(il, C_STATS, sizeof(struct il_stats_cmd),
4446 &stats_cmd);
4447 }
4448 EXPORT_SYMBOL(il_send_stats_request);
4449
4450 void
4451 il_hdl_pm_sleep(struct il_priv *il, struct il_rx_buf *rxb)
4452 {
4453 #ifdef CONFIG_IWLEGACY_DEBUG
4454 struct il_rx_pkt *pkt = rxb_addr(rxb);
4455 struct il_sleep_notification *sleep = &(pkt->u.sleep_notif);
4456 D_RX("sleep mode: %d, src: %d\n",
4457 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
4458 #endif
4459 }
4460 EXPORT_SYMBOL(il_hdl_pm_sleep);
4461
4462 void
4463 il_hdl_pm_debug_stats(struct il_priv *il, struct il_rx_buf *rxb)
4464 {
4465 struct il_rx_pkt *pkt = rxb_addr(rxb);
4466 u32 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
4467 D_RADIO("Dumping %d bytes of unhandled notification for %s:\n", len,
4468 il_get_cmd_string(pkt->hdr.cmd));
4469 il_print_hex_dump(il, IL_DL_RADIO, pkt->u.raw, len);
4470 }
4471 EXPORT_SYMBOL(il_hdl_pm_debug_stats);
4472
4473 void
4474 il_hdl_error(struct il_priv *il, struct il_rx_buf *rxb)
4475 {
4476 struct il_rx_pkt *pkt = rxb_addr(rxb);
4477
4478 IL_ERR("Error Reply type 0x%08X cmd %s (0x%02X) "
4479 "seq 0x%04X ser 0x%08X\n",
4480 le32_to_cpu(pkt->u.err_resp.error_type),
4481 il_get_cmd_string(pkt->u.err_resp.cmd_id),
4482 pkt->u.err_resp.cmd_id,
4483 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
4484 le32_to_cpu(pkt->u.err_resp.error_info));
4485 }
4486 EXPORT_SYMBOL(il_hdl_error);
4487
4488 void
4489 il_clear_isr_stats(struct il_priv *il)
4490 {
4491 memset(&il->isr_stats, 0, sizeof(il->isr_stats));
4492 }
4493
4494 int
4495 il_mac_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4496 unsigned int link_id, u16 queue,
4497 const struct ieee80211_tx_queue_params *params)
4498 {
4499 struct il_priv *il = hw->priv;
4500 unsigned long flags;
4501 int q;
4502
4503 D_MAC80211("enter\n");
4504
4505 if (!il_is_ready_rf(il)) {
4506 D_MAC80211("leave - RF not ready\n");
4507 return -EIO;
4508 }
4509
4510 if (queue >= AC_NUM) {
4511 D_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4512 return 0;
4513 }
4514
4515 q = AC_NUM - 1 - queue;
4516
4517 spin_lock_irqsave(&il->lock, flags);
4518
4519 il->qos_data.def_qos_parm.ac[q].cw_min =
4520 cpu_to_le16(params->cw_min);
4521 il->qos_data.def_qos_parm.ac[q].cw_max =
4522 cpu_to_le16(params->cw_max);
4523 il->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4524 il->qos_data.def_qos_parm.ac[q].edca_txop =
4525 cpu_to_le16((params->txop * 32));
4526
4527 il->qos_data.def_qos_parm.ac[q].reserved1 = 0;
4528
4529 spin_unlock_irqrestore(&il->lock, flags);
4530
4531 D_MAC80211("leave\n");
4532 return 0;
4533 }
4534 EXPORT_SYMBOL(il_mac_conf_tx);
4535
4536 int
4537 il_mac_tx_last_beacon(struct ieee80211_hw *hw)
4538 {
4539 struct il_priv *il = hw->priv;
4540 int ret;
4541
4542 D_MAC80211("enter\n");
4543
4544 ret = (il->ibss_manager == IL_IBSS_MANAGER);
4545
4546 D_MAC80211("leave ret %d\n", ret);
4547 return ret;
4548 }
4549 EXPORT_SYMBOL_GPL(il_mac_tx_last_beacon);
4550
4551 static int
4552 il_set_mode(struct il_priv *il)
4553 {
4554 il_connection_init_rx_config(il);
4555
4556 if (il->ops->set_rxon_chain)
4557 il->ops->set_rxon_chain(il);
4558
4559 return il_commit_rxon(il);
4560 }
4561
4562 int
4563 il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4564 {
4565 struct il_priv *il = hw->priv;
4566 int err;
4567 bool reset;
4568
4569 mutex_lock(&il->mutex);
4570 D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4571
4572 if (!il_is_ready_rf(il)) {
4573 IL_WARN("Try to add interface when device not ready\n");
4574 err = -EINVAL;
4575 goto out;
4576 }
4577
4578 /*
4579 * We do not support multiple virtual interfaces, but on hardware reset
4580 * we have to add the same interface again.
4581 */
4582 reset = (il->vif == vif);
4583 if (il->vif && !reset) {
4584 err = -EOPNOTSUPP;
4585 goto out;
4586 }
4587
4588 il->vif = vif;
4589 il->iw_mode = vif->type;
4590
4591 err = il_set_mode(il);
4592 if (err) {
4593 IL_WARN("Fail to set mode %d\n", vif->type);
4594 if (!reset) {
4595 il->vif = NULL;
4596 il->iw_mode = NL80211_IFTYPE_STATION;
4597 }
4598 }
4599
4600 out:
4601 D_MAC80211("leave err %d\n", err);
4602 mutex_unlock(&il->mutex);
4603
4604 return err;
4605 }
4606 EXPORT_SYMBOL(il_mac_add_interface);
4607
4608 static void
4609 il_teardown_interface(struct il_priv *il, struct ieee80211_vif *vif)
4610 {
4611 lockdep_assert_held(&il->mutex);
4612
4613 if (il->scan_vif == vif) {
4614 il_scan_cancel_timeout(il, 200);
4615 il_force_scan_end(il);
4616 }
4617
4618 il_set_mode(il);
4619 }
4620
4621 void
4622 il_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4623 {
4624 struct il_priv *il = hw->priv;
4625
4626 mutex_lock(&il->mutex);
4627 D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4628
4629 WARN_ON(il->vif != vif);
4630 il->vif = NULL;
4631 il->iw_mode = NL80211_IFTYPE_UNSPECIFIED;
4632 il_teardown_interface(il, vif);
4633 eth_zero_addr(il->bssid);
4634
4635 D_MAC80211("leave\n");
4636 mutex_unlock(&il->mutex);
4637 }
4638 EXPORT_SYMBOL(il_mac_remove_interface);
4639
4640 int
4641 il_alloc_txq_mem(struct il_priv *il)
4642 {
4643 if (!il->txq)
4644 il->txq =
4645 kcalloc(il->cfg->num_of_queues,
4646 sizeof(struct il_tx_queue),
4647 GFP_KERNEL);
4648 if (!il->txq) {
4649 IL_ERR("Not enough memory for txq\n");
4650 return -ENOMEM;
4651 }
4652 return 0;
4653 }
4654 EXPORT_SYMBOL(il_alloc_txq_mem);
4655
4656 void
4657 il_free_txq_mem(struct il_priv *il)
4658 {
4659 kfree(il->txq);
4660 il->txq = NULL;
4661 }
4662 EXPORT_SYMBOL(il_free_txq_mem);
4663
4664 int
4665 il_force_reset(struct il_priv *il, bool external)
4666 {
4667 struct il_force_reset *force_reset;
4668
4669 if (test_bit(S_EXIT_PENDING, &il->status))
4670 return -EINVAL;
4671
4672 force_reset = &il->force_reset;
4673 force_reset->reset_request_count++;
4674 if (!external) {
4675 if (force_reset->last_force_reset_jiffies &&
4676 time_after(force_reset->last_force_reset_jiffies +
4677 force_reset->reset_duration, jiffies)) {
4678 D_INFO("force reset rejected\n");
4679 force_reset->reset_reject_count++;
4680 return -EAGAIN;
4681 }
4682 }
4683 force_reset->reset_success_count++;
4684 force_reset->last_force_reset_jiffies = jiffies;
4685
4686 /*
4687 * if the request is from external(ex: debugfs),
4688 * then always perform the request in regardless the module
4689 * parameter setting
4690 * if the request is from internal (uCode error or driver
4691 * detect failure), then fw_restart module parameter
4692 * need to be check before performing firmware reload
4693 */
4694
4695 if (!external && !il->cfg->mod_params->restart_fw) {
4696 D_INFO("Cancel firmware reload based on "
4697 "module parameter setting\n");
4698 return 0;
4699 }
4700
4701 IL_ERR("On demand firmware reload\n");
4702
4703 /* Set the FW error flag -- cleared on il_down */
4704 set_bit(S_FW_ERROR, &il->status);
4705 wake_up(&il->wait_command_queue);
4706 /*
4707 * Keep the restart process from trying to send host
4708 * commands by clearing the INIT status bit
4709 */
4710 clear_bit(S_READY, &il->status);
4711 queue_work(il->workqueue, &il->restart);
4712
4713 return 0;
4714 }
4715 EXPORT_SYMBOL(il_force_reset);
4716
4717 int
4718 il_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4719 enum nl80211_iftype newtype, bool newp2p)
4720 {
4721 struct il_priv *il = hw->priv;
4722 int err;
4723
4724 mutex_lock(&il->mutex);
4725 D_MAC80211("enter: type %d, addr %pM newtype %d newp2p %d\n",
4726 vif->type, vif->addr, newtype, newp2p);
4727
4728 if (newp2p) {
4729 err = -EOPNOTSUPP;
4730 goto out;
4731 }
4732
4733 if (!il->vif || !il_is_ready_rf(il)) {
4734 /*
4735 * Huh? But wait ... this can maybe happen when
4736 * we're in the middle of a firmware restart!
4737 */
4738 err = -EBUSY;
4739 goto out;
4740 }
4741
4742 /* success */
4743 vif->type = newtype;
4744 vif->p2p = false;
4745 il->iw_mode = newtype;
4746 il_teardown_interface(il, vif);
4747 err = 0;
4748
4749 out:
4750 D_MAC80211("leave err %d\n", err);
4751 mutex_unlock(&il->mutex);
4752
4753 return err;
4754 }
4755 EXPORT_SYMBOL(il_mac_change_interface);
4756
4757 void il_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4758 u32 queues, bool drop)
4759 {
4760 struct il_priv *il = hw->priv;
4761 unsigned long timeout = jiffies + msecs_to_jiffies(500);
4762 int i;
4763
4764 mutex_lock(&il->mutex);
4765 D_MAC80211("enter\n");
4766
4767 if (il->txq == NULL)
4768 goto out;
4769
4770 for (i = 0; i < il->hw_params.max_txq_num; i++) {
4771 struct il_queue *q;
4772
4773 if (i == il->cmd_queue)
4774 continue;
4775
4776 q = &il->txq[i].q;
4777 if (q->read_ptr == q->write_ptr)
4778 continue;
4779
4780 if (time_after(jiffies, timeout)) {
4781 IL_ERR("Failed to flush queue %d\n", q->id);
4782 break;
4783 }
4784
4785 msleep(20);
4786 }
4787 out:
4788 D_MAC80211("leave\n");
4789 mutex_unlock(&il->mutex);
4790 }
4791 EXPORT_SYMBOL(il_mac_flush);
4792
4793 /*
4794 * On every watchdog tick we check (latest) time stamp. If it does not
4795 * change during timeout period and queue is not empty we reset firmware.
4796 */
4797 static int
4798 il_check_stuck_queue(struct il_priv *il, int cnt)
4799 {
4800 struct il_tx_queue *txq = &il->txq[cnt];
4801 struct il_queue *q = &txq->q;
4802 unsigned long timeout;
4803 unsigned long now = jiffies;
4804 int ret;
4805
4806 if (q->read_ptr == q->write_ptr) {
4807 txq->time_stamp = now;
4808 return 0;
4809 }
4810
4811 timeout =
4812 txq->time_stamp +
4813 msecs_to_jiffies(il->cfg->wd_timeout);
4814
4815 if (time_after(now, timeout)) {
4816 IL_ERR("Queue %d stuck for %u ms.\n", q->id,
4817 jiffies_to_msecs(now - txq->time_stamp));
4818 ret = il_force_reset(il, false);
4819 return (ret == -EAGAIN) ? 0 : 1;
4820 }
4821
4822 return 0;
4823 }
4824
4825 /*
4826 * Making watchdog tick be a quarter of timeout assure we will
4827 * discover the queue hung between timeout and 1.25*timeout
4828 */
4829 #define IL_WD_TICK(timeout) ((timeout) / 4)
4830
4831 /*
4832 * Watchdog timer callback, we check each tx queue for stuck, if hung
4833 * we reset the firmware. If everything is fine just rearm the timer.
4834 */
4835 void
4836 il_bg_watchdog(struct timer_list *t)
4837 {
4838 struct il_priv *il = from_timer(il, t, watchdog);
4839 int cnt;
4840 unsigned long timeout;
4841
4842 if (test_bit(S_EXIT_PENDING, &il->status))
4843 return;
4844
4845 timeout = il->cfg->wd_timeout;
4846 if (timeout == 0)
4847 return;
4848
4849 /* monitor and check for stuck cmd queue */
4850 if (il_check_stuck_queue(il, il->cmd_queue))
4851 return;
4852
4853 /* monitor and check for other stuck queues */
4854 for (cnt = 0; cnt < il->hw_params.max_txq_num; cnt++) {
4855 /* skip as we already checked the command queue */
4856 if (cnt == il->cmd_queue)
4857 continue;
4858 if (il_check_stuck_queue(il, cnt))
4859 return;
4860 }
4861
4862 mod_timer(&il->watchdog,
4863 jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4864 }
4865 EXPORT_SYMBOL(il_bg_watchdog);
4866
4867 void
4868 il_setup_watchdog(struct il_priv *il)
4869 {
4870 unsigned int timeout = il->cfg->wd_timeout;
4871
4872 if (timeout)
4873 mod_timer(&il->watchdog,
4874 jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4875 else
4876 del_timer(&il->watchdog);
4877 }
4878 EXPORT_SYMBOL(il_setup_watchdog);
4879
4880 /*
4881 * extended beacon time format
4882 * time in usec will be changed into a 32-bit value in extended:internal format
4883 * the extended part is the beacon counts
4884 * the internal part is the time in usec within one beacon interval
4885 */
4886 u32
4887 il_usecs_to_beacons(struct il_priv *il, u32 usec, u32 beacon_interval)
4888 {
4889 u32 quot;
4890 u32 rem;
4891 u32 interval = beacon_interval * TIME_UNIT;
4892
4893 if (!interval || !usec)
4894 return 0;
4895
4896 quot =
4897 (usec /
4898 interval) & (il_beacon_time_mask_high(il,
4899 il->hw_params.
4900 beacon_time_tsf_bits) >> il->
4901 hw_params.beacon_time_tsf_bits);
4902 rem =
4903 (usec % interval) & il_beacon_time_mask_low(il,
4904 il->hw_params.
4905 beacon_time_tsf_bits);
4906
4907 return (quot << il->hw_params.beacon_time_tsf_bits) + rem;
4908 }
4909 EXPORT_SYMBOL(il_usecs_to_beacons);
4910
4911 /* base is usually what we get from ucode with each received frame,
4912 * the same as HW timer counter counting down
4913 */
4914 __le32
4915 il_add_beacon_time(struct il_priv *il, u32 base, u32 addon,
4916 u32 beacon_interval)
4917 {
4918 u32 base_low = base & il_beacon_time_mask_low(il,
4919 il->hw_params.
4920 beacon_time_tsf_bits);
4921 u32 addon_low = addon & il_beacon_time_mask_low(il,
4922 il->hw_params.
4923 beacon_time_tsf_bits);
4924 u32 interval = beacon_interval * TIME_UNIT;
4925 u32 res = (base & il_beacon_time_mask_high(il,
4926 il->hw_params.
4927 beacon_time_tsf_bits)) +
4928 (addon & il_beacon_time_mask_high(il,
4929 il->hw_params.
4930 beacon_time_tsf_bits));
4931
4932 if (base_low > addon_low)
4933 res += base_low - addon_low;
4934 else if (base_low < addon_low) {
4935 res += interval + base_low - addon_low;
4936 res += (1 << il->hw_params.beacon_time_tsf_bits);
4937 } else
4938 res += (1 << il->hw_params.beacon_time_tsf_bits);
4939
4940 return cpu_to_le32(res);
4941 }
4942 EXPORT_SYMBOL(il_add_beacon_time);
4943
4944 #ifdef CONFIG_PM_SLEEP
4945
4946 static int
4947 il_pci_suspend(struct device *device)
4948 {
4949 struct il_priv *il = dev_get_drvdata(device);
4950
4951 /*
4952 * This function is called when system goes into suspend state
4953 * mac80211 will call il_mac_stop() from the mac80211 suspend function
4954 * first but since il_mac_stop() has no knowledge of who the caller is,
4955 * it will not call apm_ops.stop() to stop the DMA operation.
4956 * Calling apm_ops.stop here to make sure we stop the DMA.
4957 */
4958 il_apm_stop(il);
4959
4960 return 0;
4961 }
4962
4963 static int
4964 il_pci_resume(struct device *device)
4965 {
4966 struct pci_dev *pdev = to_pci_dev(device);
4967 struct il_priv *il = pci_get_drvdata(pdev);
4968 bool hw_rfkill = false;
4969
4970 /*
4971 * We disable the RETRY_TIMEOUT register (0x41) to keep
4972 * PCI Tx retries from interfering with C3 CPU state.
4973 */
4974 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
4975
4976 _il_wr(il, CSR_INT, 0xffffffff);
4977 _il_wr(il, CSR_FH_INT_STATUS, 0xffffffff);
4978 il_enable_interrupts(il);
4979
4980 if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4981 hw_rfkill = true;
4982
4983 if (hw_rfkill)
4984 set_bit(S_RFKILL, &il->status);
4985 else
4986 clear_bit(S_RFKILL, &il->status);
4987
4988 wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rfkill);
4989
4990 return 0;
4991 }
4992
4993 SIMPLE_DEV_PM_OPS(il_pm_ops, il_pci_suspend, il_pci_resume);
4994 EXPORT_SYMBOL(il_pm_ops);
4995
4996 #endif /* CONFIG_PM_SLEEP */
4997
4998 static void
4999 il_update_qos(struct il_priv *il)
5000 {
5001 if (test_bit(S_EXIT_PENDING, &il->status))
5002 return;
5003
5004 il->qos_data.def_qos_parm.qos_flags = 0;
5005
5006 if (il->qos_data.qos_active)
5007 il->qos_data.def_qos_parm.qos_flags |=
5008 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
5009
5010 if (il->ht.enabled)
5011 il->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
5012
5013 D_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
5014 il->qos_data.qos_active, il->qos_data.def_qos_parm.qos_flags);
5015
5016 il_send_cmd_pdu_async(il, C_QOS_PARAM, sizeof(struct il_qosparam_cmd),
5017 &il->qos_data.def_qos_parm, NULL);
5018 }
5019
5020 /*
5021 * il_mac_config - mac80211 config callback
5022 */
5023 int
5024 il_mac_config(struct ieee80211_hw *hw, u32 changed)
5025 {
5026 struct il_priv *il = hw->priv;
5027 const struct il_channel_info *ch_info;
5028 struct ieee80211_conf *conf = &hw->conf;
5029 struct ieee80211_channel *channel = conf->chandef.chan;
5030 struct il_ht_config *ht_conf = &il->current_ht_config;
5031 unsigned long flags = 0;
5032 int ret = 0;
5033 u16 ch;
5034 int scan_active = 0;
5035 bool ht_changed = false;
5036
5037 mutex_lock(&il->mutex);
5038 D_MAC80211("enter: channel %d changed 0x%X\n", channel->hw_value,
5039 changed);
5040
5041 if (unlikely(test_bit(S_SCANNING, &il->status))) {
5042 scan_active = 1;
5043 D_MAC80211("scan active\n");
5044 }
5045
5046 if (changed &
5047 (IEEE80211_CONF_CHANGE_SMPS | IEEE80211_CONF_CHANGE_CHANNEL)) {
5048 /* mac80211 uses static for non-HT which is what we want */
5049 il->current_ht_config.smps = conf->smps_mode;
5050
5051 /*
5052 * Recalculate chain counts.
5053 *
5054 * If monitor mode is enabled then mac80211 will
5055 * set up the SM PS mode to OFF if an HT channel is
5056 * configured.
5057 */
5058 if (il->ops->set_rxon_chain)
5059 il->ops->set_rxon_chain(il);
5060 }
5061
5062 /* during scanning mac80211 will delay channel setting until
5063 * scan finish with changed = 0
5064 */
5065 if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
5066
5067 if (scan_active)
5068 goto set_ch_out;
5069
5070 ch = channel->hw_value;
5071 ch_info = il_get_channel_info(il, channel->band, ch);
5072 if (!il_is_channel_valid(ch_info)) {
5073 D_MAC80211("leave - invalid channel\n");
5074 ret = -EINVAL;
5075 goto set_ch_out;
5076 }
5077
5078 if (il->iw_mode == NL80211_IFTYPE_ADHOC &&
5079 !il_is_channel_ibss(ch_info)) {
5080 D_MAC80211("leave - not IBSS channel\n");
5081 ret = -EINVAL;
5082 goto set_ch_out;
5083 }
5084
5085 spin_lock_irqsave(&il->lock, flags);
5086
5087 /* Configure HT40 channels */
5088 if (il->ht.enabled != conf_is_ht(conf)) {
5089 il->ht.enabled = conf_is_ht(conf);
5090 ht_changed = true;
5091 }
5092 if (il->ht.enabled) {
5093 if (conf_is_ht40_minus(conf)) {
5094 il->ht.extension_chan_offset =
5095 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
5096 il->ht.is_40mhz = true;
5097 } else if (conf_is_ht40_plus(conf)) {
5098 il->ht.extension_chan_offset =
5099 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
5100 il->ht.is_40mhz = true;
5101 } else {
5102 il->ht.extension_chan_offset =
5103 IEEE80211_HT_PARAM_CHA_SEC_NONE;
5104 il->ht.is_40mhz = false;
5105 }
5106 } else
5107 il->ht.is_40mhz = false;
5108
5109 /*
5110 * Default to no protection. Protection mode will
5111 * later be set from BSS config in il_ht_conf
5112 */
5113 il->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
5114
5115 /* if we are switching from ht to 2.4 clear flags
5116 * from any ht related info since 2.4 does not
5117 * support ht */
5118 if ((le16_to_cpu(il->staging.channel) != ch))
5119 il->staging.flags = 0;
5120
5121 il_set_rxon_channel(il, channel);
5122 il_set_rxon_ht(il, ht_conf);
5123
5124 il_set_flags_for_band(il, channel->band, il->vif);
5125
5126 spin_unlock_irqrestore(&il->lock, flags);
5127
5128 if (il->ops->update_bcast_stations)
5129 ret = il->ops->update_bcast_stations(il);
5130
5131 set_ch_out:
5132 /* The list of supported rates and rate mask can be different
5133 * for each band; since the band may have changed, reset
5134 * the rate mask to what mac80211 lists */
5135 il_set_rate(il);
5136 }
5137
5138 if (changed & (IEEE80211_CONF_CHANGE_PS | IEEE80211_CONF_CHANGE_IDLE)) {
5139 il->power_data.ps_disabled = !(conf->flags & IEEE80211_CONF_PS);
5140 if (!il->power_data.ps_disabled)
5141 IL_WARN_ONCE("Enabling power save might cause firmware crashes\n");
5142 ret = il_power_update_mode(il, false);
5143 if (ret)
5144 D_MAC80211("Error setting sleep level\n");
5145 }
5146
5147 if (changed & IEEE80211_CONF_CHANGE_POWER) {
5148 D_MAC80211("TX Power old=%d new=%d\n", il->tx_power_user_lmt,
5149 conf->power_level);
5150
5151 il_set_tx_power(il, conf->power_level, false);
5152 }
5153
5154 if (!il_is_ready(il)) {
5155 D_MAC80211("leave - not ready\n");
5156 goto out;
5157 }
5158
5159 if (scan_active)
5160 goto out;
5161
5162 if (memcmp(&il->active, &il->staging, sizeof(il->staging)))
5163 il_commit_rxon(il);
5164 else
5165 D_INFO("Not re-sending same RXON configuration.\n");
5166 if (ht_changed)
5167 il_update_qos(il);
5168
5169 out:
5170 D_MAC80211("leave ret %d\n", ret);
5171 mutex_unlock(&il->mutex);
5172
5173 return ret;
5174 }
5175 EXPORT_SYMBOL(il_mac_config);
5176
5177 void
5178 il_mac_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5179 {
5180 struct il_priv *il = hw->priv;
5181 unsigned long flags;
5182
5183 mutex_lock(&il->mutex);
5184 D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
5185
5186 spin_lock_irqsave(&il->lock, flags);
5187
5188 memset(&il->current_ht_config, 0, sizeof(struct il_ht_config));
5189
5190 /* new association get rid of ibss beacon skb */
5191 dev_consume_skb_irq(il->beacon_skb);
5192 il->beacon_skb = NULL;
5193 il->timestamp = 0;
5194
5195 spin_unlock_irqrestore(&il->lock, flags);
5196
5197 il_scan_cancel_timeout(il, 100);
5198 if (!il_is_ready_rf(il)) {
5199 D_MAC80211("leave - not ready\n");
5200 mutex_unlock(&il->mutex);
5201 return;
5202 }
5203
5204 /* we are restarting association process */
5205 il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5206 il_commit_rxon(il);
5207
5208 il_set_rate(il);
5209
5210 D_MAC80211("leave\n");
5211 mutex_unlock(&il->mutex);
5212 }
5213 EXPORT_SYMBOL(il_mac_reset_tsf);
5214
5215 static void
5216 il_ht_conf(struct il_priv *il, struct ieee80211_vif *vif)
5217 {
5218 struct il_ht_config *ht_conf = &il->current_ht_config;
5219 struct ieee80211_sta *sta;
5220 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
5221
5222 D_ASSOC("enter:\n");
5223
5224 if (!il->ht.enabled)
5225 return;
5226
5227 il->ht.protection =
5228 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
5229 il->ht.non_gf_sta_present =
5230 !!(bss_conf->
5231 ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
5232
5233 ht_conf->single_chain_sufficient = false;
5234
5235 switch (vif->type) {
5236 case NL80211_IFTYPE_STATION:
5237 rcu_read_lock();
5238 sta = ieee80211_find_sta(vif, bss_conf->bssid);
5239 if (sta) {
5240 struct ieee80211_sta_ht_cap *ht_cap = &sta->deflink.ht_cap;
5241 int maxstreams;
5242
5243 maxstreams =
5244 (ht_cap->mcs.
5245 tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
5246 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
5247 maxstreams += 1;
5248
5249 if (ht_cap->mcs.rx_mask[1] == 0 &&
5250 ht_cap->mcs.rx_mask[2] == 0)
5251 ht_conf->single_chain_sufficient = true;
5252 if (maxstreams <= 1)
5253 ht_conf->single_chain_sufficient = true;
5254 } else {
5255 /*
5256 * If at all, this can only happen through a race
5257 * when the AP disconnects us while we're still
5258 * setting up the connection, in that case mac80211
5259 * will soon tell us about that.
5260 */
5261 ht_conf->single_chain_sufficient = true;
5262 }
5263 rcu_read_unlock();
5264 break;
5265 case NL80211_IFTYPE_ADHOC:
5266 ht_conf->single_chain_sufficient = true;
5267 break;
5268 default:
5269 break;
5270 }
5271
5272 D_ASSOC("leave\n");
5273 }
5274
5275 static inline void
5276 il_set_no_assoc(struct il_priv *il, struct ieee80211_vif *vif)
5277 {
5278 /*
5279 * inform the ucode that there is no longer an
5280 * association and that no more packets should be
5281 * sent
5282 */
5283 il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5284 il->staging.assoc_id = 0;
5285 il_commit_rxon(il);
5286 }
5287
5288 static void
5289 il_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5290 {
5291 struct il_priv *il = hw->priv;
5292 unsigned long flags;
5293 __le64 timestamp;
5294 struct sk_buff *skb = ieee80211_beacon_get(hw, vif, 0);
5295
5296 if (!skb)
5297 return;
5298
5299 D_MAC80211("enter\n");
5300
5301 lockdep_assert_held(&il->mutex);
5302
5303 if (!il->beacon_enabled) {
5304 IL_ERR("update beacon with no beaconing enabled\n");
5305 dev_kfree_skb(skb);
5306 return;
5307 }
5308
5309 spin_lock_irqsave(&il->lock, flags);
5310 dev_consume_skb_irq(il->beacon_skb);
5311 il->beacon_skb = skb;
5312
5313 timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
5314 il->timestamp = le64_to_cpu(timestamp);
5315
5316 D_MAC80211("leave\n");
5317 spin_unlock_irqrestore(&il->lock, flags);
5318
5319 if (!il_is_ready_rf(il)) {
5320 D_MAC80211("leave - RF not ready\n");
5321 return;
5322 }
5323
5324 il->ops->post_associate(il);
5325 }
5326
5327 void
5328 il_mac_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5329 struct ieee80211_bss_conf *bss_conf, u64 changes)
5330 {
5331 struct il_priv *il = hw->priv;
5332 int ret;
5333
5334 mutex_lock(&il->mutex);
5335 D_MAC80211("enter: changes 0x%llx\n", changes);
5336
5337 if (!il_is_alive(il)) {
5338 D_MAC80211("leave - not alive\n");
5339 mutex_unlock(&il->mutex);
5340 return;
5341 }
5342
5343 if (changes & BSS_CHANGED_QOS) {
5344 unsigned long flags;
5345
5346 spin_lock_irqsave(&il->lock, flags);
5347 il->qos_data.qos_active = bss_conf->qos;
5348 il_update_qos(il);
5349 spin_unlock_irqrestore(&il->lock, flags);
5350 }
5351
5352 if (changes & BSS_CHANGED_BEACON_ENABLED) {
5353 /* FIXME: can we remove beacon_enabled ? */
5354 if (vif->bss_conf.enable_beacon)
5355 il->beacon_enabled = true;
5356 else
5357 il->beacon_enabled = false;
5358 }
5359
5360 if (changes & BSS_CHANGED_BSSID) {
5361 D_MAC80211("BSSID %pM\n", bss_conf->bssid);
5362
5363 /*
5364 * On passive channel we wait with blocked queues to see if
5365 * there is traffic on that channel. If no frame will be
5366 * received (what is very unlikely since scan detects AP on
5367 * that channel, but theoretically possible), mac80211 associate
5368 * procedure will time out and mac80211 will call us with NULL
5369 * bssid. We have to unblock queues on such condition.
5370 */
5371 if (is_zero_ether_addr(bss_conf->bssid))
5372 il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
5373
5374 /*
5375 * If there is currently a HW scan going on in the background,
5376 * then we need to cancel it, otherwise sometimes we are not
5377 * able to authenticate (FIXME: why ?)
5378 */
5379 if (il_scan_cancel_timeout(il, 100)) {
5380 D_MAC80211("leave - scan abort failed\n");
5381 mutex_unlock(&il->mutex);
5382 return;
5383 }
5384
5385 /* mac80211 only sets assoc when in STATION mode */
5386 memcpy(il->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
5387
5388 /* FIXME: currently needed in a few places */
5389 memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5390 }
5391
5392 /*
5393 * This needs to be after setting the BSSID in case
5394 * mac80211 decides to do both changes at once because
5395 * it will invoke post_associate.
5396 */
5397 if (vif->type == NL80211_IFTYPE_ADHOC && (changes & BSS_CHANGED_BEACON))
5398 il_beacon_update(hw, vif);
5399
5400 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5401 D_MAC80211("ERP_PREAMBLE %d\n", bss_conf->use_short_preamble);
5402 if (bss_conf->use_short_preamble)
5403 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5404 else
5405 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5406 }
5407
5408 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5409 D_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
5410 if (bss_conf->use_cts_prot && il->band != NL80211_BAND_5GHZ)
5411 il->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
5412 else
5413 il->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5414 if (bss_conf->use_cts_prot)
5415 il->staging.flags |= RXON_FLG_SELF_CTS_EN;
5416 else
5417 il->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
5418 }
5419
5420 if (changes & BSS_CHANGED_BASIC_RATES) {
5421 /* XXX use this information
5422 *
5423 * To do that, remove code from il_set_rate() and put something
5424 * like this here:
5425 *
5426 if (A-band)
5427 il->staging.ofdm_basic_rates =
5428 bss_conf->basic_rates;
5429 else
5430 il->staging.ofdm_basic_rates =
5431 bss_conf->basic_rates >> 4;
5432 il->staging.cck_basic_rates =
5433 bss_conf->basic_rates & 0xF;
5434 */
5435 }
5436
5437 if (changes & BSS_CHANGED_HT) {
5438 il_ht_conf(il, vif);
5439
5440 if (il->ops->set_rxon_chain)
5441 il->ops->set_rxon_chain(il);
5442 }
5443
5444 if (changes & BSS_CHANGED_ASSOC) {
5445 D_MAC80211("ASSOC %d\n", vif->cfg.assoc);
5446 if (vif->cfg.assoc) {
5447 il->timestamp = bss_conf->sync_tsf;
5448
5449 if (!il_is_rfkill(il))
5450 il->ops->post_associate(il);
5451 } else
5452 il_set_no_assoc(il, vif);
5453 }
5454
5455 if (changes && il_is_associated(il) && vif->cfg.aid) {
5456 D_MAC80211("Changes (%#llx) while associated\n", changes);
5457 ret = il_send_rxon_assoc(il);
5458 if (!ret) {
5459 /* Sync active_rxon with latest change. */
5460 memcpy((void *)&il->active, &il->staging,
5461 sizeof(struct il_rxon_cmd));
5462 }
5463 }
5464
5465 if (changes & BSS_CHANGED_BEACON_ENABLED) {
5466 if (vif->bss_conf.enable_beacon) {
5467 memcpy(il->staging.bssid_addr, bss_conf->bssid,
5468 ETH_ALEN);
5469 memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5470 il->ops->config_ap(il);
5471 } else
5472 il_set_no_assoc(il, vif);
5473 }
5474
5475 if (changes & BSS_CHANGED_IBSS) {
5476 ret = il->ops->manage_ibss_station(il, vif,
5477 vif->cfg.ibss_joined);
5478 if (ret)
5479 IL_ERR("failed to %s IBSS station %pM\n",
5480 vif->cfg.ibss_joined ? "add" : "remove",
5481 bss_conf->bssid);
5482 }
5483
5484 D_MAC80211("leave\n");
5485 mutex_unlock(&il->mutex);
5486 }
5487 EXPORT_SYMBOL(il_mac_bss_info_changed);
5488
5489 irqreturn_t
5490 il_isr(int irq, void *data)
5491 {
5492 struct il_priv *il = data;
5493 u32 inta, inta_mask;
5494 u32 inta_fh;
5495 unsigned long flags;
5496 if (!il)
5497 return IRQ_NONE;
5498
5499 spin_lock_irqsave(&il->lock, flags);
5500
5501 /* Disable (but don't clear!) interrupts here to avoid
5502 * back-to-back ISRs and sporadic interrupts from our NIC.
5503 * If we have something to service, the tasklet will re-enable ints.
5504 * If we *don't* have something, we'll re-enable before leaving here. */
5505 inta_mask = _il_rd(il, CSR_INT_MASK); /* just for debug */
5506 _il_wr(il, CSR_INT_MASK, 0x00000000);
5507
5508 /* Discover which interrupts are active/pending */
5509 inta = _il_rd(il, CSR_INT);
5510 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
5511
5512 /* Ignore interrupt if there's nothing in NIC to service.
5513 * This may be due to IRQ shared with another device,
5514 * or due to sporadic interrupts thrown from our NIC. */
5515 if (!inta && !inta_fh) {
5516 D_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5517 goto none;
5518 }
5519
5520 if (inta == 0xFFFFFFFF || (inta & 0xFFFFFFF0) == 0xa5a5a5a0) {
5521 /* Hardware disappeared. It might have already raised
5522 * an interrupt */
5523 IL_WARN("HARDWARE GONE?? INTA == 0x%08x\n", inta);
5524 goto unplugged;
5525 }
5526
5527 D_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask,
5528 inta_fh);
5529
5530 inta &= ~CSR_INT_BIT_SCD;
5531
5532 /* il_irq_tasklet() will service interrupts and re-enable them */
5533 if (likely(inta || inta_fh))
5534 tasklet_schedule(&il->irq_tasklet);
5535
5536 unplugged:
5537 spin_unlock_irqrestore(&il->lock, flags);
5538 return IRQ_HANDLED;
5539
5540 none:
5541 /* re-enable interrupts here since we don't have anything to service. */
5542 /* only Re-enable if disabled by irq */
5543 if (test_bit(S_INT_ENABLED, &il->status))
5544 il_enable_interrupts(il);
5545 spin_unlock_irqrestore(&il->lock, flags);
5546 return IRQ_NONE;
5547 }
5548 EXPORT_SYMBOL(il_isr);
5549
5550 /*
5551 * il_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
5552 * function.
5553 */
5554 void
5555 il_tx_cmd_protection(struct il_priv *il, struct ieee80211_tx_info *info,
5556 __le16 fc, __le32 *tx_flags)
5557 {
5558 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
5559 *tx_flags |= TX_CMD_FLG_RTS_MSK;
5560 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
5561 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5562
5563 if (!ieee80211_is_mgmt(fc))
5564 return;
5565
5566 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
5567 case cpu_to_le16(IEEE80211_STYPE_AUTH):
5568 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
5569 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
5570 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
5571 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5572 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5573 break;
5574 }
5575 } else if (info->control.rates[0].
5576 flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
5577 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5578 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5579 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5580 }
5581 }
5582 EXPORT_SYMBOL(il_tx_cmd_protection);
Kernel DRM miscellaneous fixes and cross-tree changes