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iwlagn: add module parameter to disable stuck queue watchdog timer
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-agn.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29
30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31
32 #include <linux/kernel.h>
33 #include <linux/module.h>
34 #include <linux/init.h>
35 #include <linux/slab.h>
36 #include <linux/dma-mapping.h>
37 #include <linux/delay.h>
38 #include <linux/sched.h>
39 #include <linux/skbuff.h>
40 #include <linux/netdevice.h>
41 #include <linux/wireless.h>
42 #include <linux/firmware.h>
43 #include <linux/etherdevice.h>
44 #include <linux/if_arp.h>
45
46 #include <net/mac80211.h>
47
48 #include <asm/div64.h>
49
50 #include "iwl-eeprom.h"
51 #include "iwl-dev.h"
52 #include "iwl-core.h"
53 #include "iwl-io.h"
54 #include "iwl-helpers.h"
55 #include "iwl-sta.h"
56 #include "iwl-agn-calib.h"
57 #include "iwl-agn.h"
58 #include "iwl-pci.h"
59
60
61 /******************************************************************************
62 *
63 * module boiler plate
64 *
65 ******************************************************************************/
66
67 /*
68 * module name, copyright, version, etc.
69 */
70 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
71
72 #ifdef CONFIG_IWLWIFI_DEBUG
73 #define VD "d"
74 #else
75 #define VD
76 #endif
77
78 #define DRV_VERSION IWLWIFI_VERSION VD
79
80
81 MODULE_DESCRIPTION(DRV_DESCRIPTION);
82 MODULE_VERSION(DRV_VERSION);
83 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
84 MODULE_LICENSE("GPL");
85
86 static int iwlagn_ant_coupling;
87 static bool iwlagn_bt_ch_announce = 1;
88
89 void iwl_update_chain_flags(struct iwl_priv *priv)
90 {
91 struct iwl_rxon_context *ctx;
92
93 if (priv->cfg->ops->hcmd->set_rxon_chain) {
94 for_each_context(priv, ctx) {
95 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
96 if (ctx->active.rx_chain != ctx->staging.rx_chain)
97 iwlagn_commit_rxon(priv, ctx);
98 }
99 }
100 }
101
102 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
103 static void iwl_set_beacon_tim(struct iwl_priv *priv,
104 struct iwl_tx_beacon_cmd *tx_beacon_cmd,
105 u8 *beacon, u32 frame_size)
106 {
107 u16 tim_idx;
108 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
109
110 /*
111 * The index is relative to frame start but we start looking at the
112 * variable-length part of the beacon.
113 */
114 tim_idx = mgmt->u.beacon.variable - beacon;
115
116 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
117 while ((tim_idx < (frame_size - 2)) &&
118 (beacon[tim_idx] != WLAN_EID_TIM))
119 tim_idx += beacon[tim_idx+1] + 2;
120
121 /* If TIM field was found, set variables */
122 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
123 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
124 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
125 } else
126 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
127 }
128
129 int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
130 {
131 struct iwl_tx_beacon_cmd *tx_beacon_cmd;
132 struct iwl_host_cmd cmd = {
133 .id = REPLY_TX_BEACON,
134 };
135 struct ieee80211_tx_info *info;
136 u32 frame_size;
137 u32 rate_flags;
138 u32 rate;
139
140 /*
141 * We have to set up the TX command, the TX Beacon command, and the
142 * beacon contents.
143 */
144
145 lockdep_assert_held(&priv->mutex);
146
147 if (!priv->beacon_ctx) {
148 IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
149 return 0;
150 }
151
152 if (WARN_ON(!priv->beacon_skb))
153 return -EINVAL;
154
155 /* Allocate beacon command */
156 if (!priv->beacon_cmd)
157 priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
158 tx_beacon_cmd = priv->beacon_cmd;
159 if (!tx_beacon_cmd)
160 return -ENOMEM;
161
162 frame_size = priv->beacon_skb->len;
163
164 /* Set up TX command fields */
165 tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
166 tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
167 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
168 tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
169 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
170
171 /* Set up TX beacon command fields */
172 iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
173 frame_size);
174
175 /* Set up packet rate and flags */
176 info = IEEE80211_SKB_CB(priv->beacon_skb);
177
178 /*
179 * Let's set up the rate at least somewhat correctly;
180 * it will currently not actually be used by the uCode,
181 * it uses the broadcast station's rate instead.
182 */
183 if (info->control.rates[0].idx < 0 ||
184 info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
185 rate = 0;
186 else
187 rate = info->control.rates[0].idx;
188
189 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
190 priv->hw_params.valid_tx_ant);
191 rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
192
193 /* In mac80211, rates for 5 GHz start at 0 */
194 if (info->band == IEEE80211_BAND_5GHZ)
195 rate += IWL_FIRST_OFDM_RATE;
196 else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
197 rate_flags |= RATE_MCS_CCK_MSK;
198
199 tx_beacon_cmd->tx.rate_n_flags =
200 iwl_hw_set_rate_n_flags(rate, rate_flags);
201
202 /* Submit command */
203 cmd.len[0] = sizeof(*tx_beacon_cmd);
204 cmd.data[0] = tx_beacon_cmd;
205 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
206 cmd.len[1] = frame_size;
207 cmd.data[1] = priv->beacon_skb->data;
208 cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
209
210 return iwl_send_cmd_sync(priv, &cmd);
211 }
212
213 static void iwl_bg_beacon_update(struct work_struct *work)
214 {
215 struct iwl_priv *priv =
216 container_of(work, struct iwl_priv, beacon_update);
217 struct sk_buff *beacon;
218
219 mutex_lock(&priv->mutex);
220 if (!priv->beacon_ctx) {
221 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
222 goto out;
223 }
224
225 if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
226 /*
227 * The ucode will send beacon notifications even in
228 * IBSS mode, but we don't want to process them. But
229 * we need to defer the type check to here due to
230 * requiring locking around the beacon_ctx access.
231 */
232 goto out;
233 }
234
235 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
236 beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
237 if (!beacon) {
238 IWL_ERR(priv, "update beacon failed -- keeping old\n");
239 goto out;
240 }
241
242 /* new beacon skb is allocated every time; dispose previous.*/
243 dev_kfree_skb(priv->beacon_skb);
244
245 priv->beacon_skb = beacon;
246
247 iwlagn_send_beacon_cmd(priv);
248 out:
249 mutex_unlock(&priv->mutex);
250 }
251
252 static void iwl_bg_bt_runtime_config(struct work_struct *work)
253 {
254 struct iwl_priv *priv =
255 container_of(work, struct iwl_priv, bt_runtime_config);
256
257 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
258 return;
259
260 /* dont send host command if rf-kill is on */
261 if (!iwl_is_ready_rf(priv))
262 return;
263 priv->cfg->ops->hcmd->send_bt_config(priv);
264 }
265
266 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
267 {
268 struct iwl_priv *priv =
269 container_of(work, struct iwl_priv, bt_full_concurrency);
270 struct iwl_rxon_context *ctx;
271
272 mutex_lock(&priv->mutex);
273
274 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
275 goto out;
276
277 /* dont send host command if rf-kill is on */
278 if (!iwl_is_ready_rf(priv))
279 goto out;
280
281 IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
282 priv->bt_full_concurrent ?
283 "full concurrency" : "3-wire");
284
285 /*
286 * LQ & RXON updated cmds must be sent before BT Config cmd
287 * to avoid 3-wire collisions
288 */
289 for_each_context(priv, ctx) {
290 if (priv->cfg->ops->hcmd->set_rxon_chain)
291 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
292 iwlagn_commit_rxon(priv, ctx);
293 }
294
295 priv->cfg->ops->hcmd->send_bt_config(priv);
296 out:
297 mutex_unlock(&priv->mutex);
298 }
299
300 /**
301 * iwl_bg_statistics_periodic - Timer callback to queue statistics
302 *
303 * This callback is provided in order to send a statistics request.
304 *
305 * This timer function is continually reset to execute within
306 * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
307 * was received. We need to ensure we receive the statistics in order
308 * to update the temperature used for calibrating the TXPOWER.
309 */
310 static void iwl_bg_statistics_periodic(unsigned long data)
311 {
312 struct iwl_priv *priv = (struct iwl_priv *)data;
313
314 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
315 return;
316
317 /* dont send host command if rf-kill is on */
318 if (!iwl_is_ready_rf(priv))
319 return;
320
321 iwl_send_statistics_request(priv, CMD_ASYNC, false);
322 }
323
324
325 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
326 u32 start_idx, u32 num_events,
327 u32 mode)
328 {
329 u32 i;
330 u32 ptr; /* SRAM byte address of log data */
331 u32 ev, time, data; /* event log data */
332 unsigned long reg_flags;
333
334 if (mode == 0)
335 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
336 else
337 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
338
339 /* Make sure device is powered up for SRAM reads */
340 spin_lock_irqsave(&priv->reg_lock, reg_flags);
341 if (iwl_grab_nic_access(priv)) {
342 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
343 return;
344 }
345
346 /* Set starting address; reads will auto-increment */
347 iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
348 rmb();
349
350 /*
351 * "time" is actually "data" for mode 0 (no timestamp).
352 * place event id # at far right for easier visual parsing.
353 */
354 for (i = 0; i < num_events; i++) {
355 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
356 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
357 if (mode == 0) {
358 trace_iwlwifi_dev_ucode_cont_event(priv,
359 0, time, ev);
360 } else {
361 data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
362 trace_iwlwifi_dev_ucode_cont_event(priv,
363 time, data, ev);
364 }
365 }
366 /* Allow device to power down */
367 iwl_release_nic_access(priv);
368 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
369 }
370
371 static void iwl_continuous_event_trace(struct iwl_priv *priv)
372 {
373 u32 capacity; /* event log capacity in # entries */
374 u32 base; /* SRAM byte address of event log header */
375 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
376 u32 num_wraps; /* # times uCode wrapped to top of log */
377 u32 next_entry; /* index of next entry to be written by uCode */
378
379 base = priv->device_pointers.error_event_table;
380 if (priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
381 capacity = iwl_read_targ_mem(priv, base);
382 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
383 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
384 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
385 } else
386 return;
387
388 if (num_wraps == priv->event_log.num_wraps) {
389 iwl_print_cont_event_trace(priv,
390 base, priv->event_log.next_entry,
391 next_entry - priv->event_log.next_entry,
392 mode);
393 priv->event_log.non_wraps_count++;
394 } else {
395 if ((num_wraps - priv->event_log.num_wraps) > 1)
396 priv->event_log.wraps_more_count++;
397 else
398 priv->event_log.wraps_once_count++;
399 trace_iwlwifi_dev_ucode_wrap_event(priv,
400 num_wraps - priv->event_log.num_wraps,
401 next_entry, priv->event_log.next_entry);
402 if (next_entry < priv->event_log.next_entry) {
403 iwl_print_cont_event_trace(priv, base,
404 priv->event_log.next_entry,
405 capacity - priv->event_log.next_entry,
406 mode);
407
408 iwl_print_cont_event_trace(priv, base, 0,
409 next_entry, mode);
410 } else {
411 iwl_print_cont_event_trace(priv, base,
412 next_entry, capacity - next_entry,
413 mode);
414
415 iwl_print_cont_event_trace(priv, base, 0,
416 next_entry, mode);
417 }
418 }
419 priv->event_log.num_wraps = num_wraps;
420 priv->event_log.next_entry = next_entry;
421 }
422
423 /**
424 * iwl_bg_ucode_trace - Timer callback to log ucode event
425 *
426 * The timer is continually set to execute every
427 * UCODE_TRACE_PERIOD milliseconds after the last timer expired
428 * this function is to perform continuous uCode event logging operation
429 * if enabled
430 */
431 static void iwl_bg_ucode_trace(unsigned long data)
432 {
433 struct iwl_priv *priv = (struct iwl_priv *)data;
434
435 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
436 return;
437
438 if (priv->event_log.ucode_trace) {
439 iwl_continuous_event_trace(priv);
440 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
441 mod_timer(&priv->ucode_trace,
442 jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
443 }
444 }
445
446 static void iwl_bg_tx_flush(struct work_struct *work)
447 {
448 struct iwl_priv *priv =
449 container_of(work, struct iwl_priv, tx_flush);
450
451 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
452 return;
453
454 /* do nothing if rf-kill is on */
455 if (!iwl_is_ready_rf(priv))
456 return;
457
458 IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
459 iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
460 }
461
462 /**
463 * iwl_rx_handle - Main entry function for receiving responses from uCode
464 *
465 * Uses the priv->rx_handlers callback function array to invoke
466 * the appropriate handlers, including command responses,
467 * frame-received notifications, and other notifications.
468 */
469 static void iwl_rx_handle(struct iwl_priv *priv)
470 {
471 struct iwl_rx_mem_buffer *rxb;
472 struct iwl_rx_packet *pkt;
473 struct iwl_rx_queue *rxq = &priv->rxq;
474 u32 r, i;
475 int reclaim;
476 unsigned long flags;
477 u8 fill_rx = 0;
478 u32 count = 8;
479 int total_empty;
480
481 /* uCode's read index (stored in shared DRAM) indicates the last Rx
482 * buffer that the driver may process (last buffer filled by ucode). */
483 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
484 i = rxq->read;
485
486 /* Rx interrupt, but nothing sent from uCode */
487 if (i == r)
488 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
489
490 /* calculate total frames need to be restock after handling RX */
491 total_empty = r - rxq->write_actual;
492 if (total_empty < 0)
493 total_empty += RX_QUEUE_SIZE;
494
495 if (total_empty > (RX_QUEUE_SIZE / 2))
496 fill_rx = 1;
497
498 while (i != r) {
499 int len;
500
501 rxb = rxq->queue[i];
502
503 /* If an RXB doesn't have a Rx queue slot associated with it,
504 * then a bug has been introduced in the queue refilling
505 * routines -- catch it here */
506 if (WARN_ON(rxb == NULL)) {
507 i = (i + 1) & RX_QUEUE_MASK;
508 continue;
509 }
510
511 rxq->queue[i] = NULL;
512
513 dma_unmap_page(priv->bus.dev, rxb->page_dma,
514 PAGE_SIZE << priv->hw_params.rx_page_order,
515 DMA_FROM_DEVICE);
516 pkt = rxb_addr(rxb);
517
518 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
519 len += sizeof(u32); /* account for status word */
520 trace_iwlwifi_dev_rx(priv, pkt, len);
521
522 /* Reclaim a command buffer only if this packet is a response
523 * to a (driver-originated) command.
524 * If the packet (e.g. Rx frame) originated from uCode,
525 * there is no command buffer to reclaim.
526 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
527 * but apparently a few don't get set; catch them here. */
528 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
529 (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
530 (pkt->hdr.cmd != REPLY_RX) &&
531 (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
532 (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
533 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
534 (pkt->hdr.cmd != REPLY_TX);
535
536 /*
537 * Do the notification wait before RX handlers so
538 * even if the RX handler consumes the RXB we have
539 * access to it in the notification wait entry.
540 */
541 if (!list_empty(&priv->_agn.notif_waits)) {
542 struct iwl_notification_wait *w;
543
544 spin_lock(&priv->_agn.notif_wait_lock);
545 list_for_each_entry(w, &priv->_agn.notif_waits, list) {
546 if (w->cmd == pkt->hdr.cmd) {
547 w->triggered = true;
548 if (w->fn)
549 w->fn(priv, pkt, w->fn_data);
550 }
551 }
552 spin_unlock(&priv->_agn.notif_wait_lock);
553
554 wake_up_all(&priv->_agn.notif_waitq);
555 }
556 if (priv->pre_rx_handler)
557 priv->pre_rx_handler(priv, rxb);
558
559 /* Based on type of command response or notification,
560 * handle those that need handling via function in
561 * rx_handlers table. See iwl_setup_rx_handlers() */
562 if (priv->rx_handlers[pkt->hdr.cmd]) {
563 IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
564 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
565 priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
566 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
567 } else {
568 /* No handling needed */
569 IWL_DEBUG_RX(priv,
570 "r %d i %d No handler needed for %s, 0x%02x\n",
571 r, i, get_cmd_string(pkt->hdr.cmd),
572 pkt->hdr.cmd);
573 }
574
575 /*
576 * XXX: After here, we should always check rxb->page
577 * against NULL before touching it or its virtual
578 * memory (pkt). Because some rx_handler might have
579 * already taken or freed the pages.
580 */
581
582 if (reclaim) {
583 /* Invoke any callbacks, transfer the buffer to caller,
584 * and fire off the (possibly) blocking iwl_send_cmd()
585 * as we reclaim the driver command queue */
586 if (rxb->page)
587 iwl_tx_cmd_complete(priv, rxb);
588 else
589 IWL_WARN(priv, "Claim null rxb?\n");
590 }
591
592 /* Reuse the page if possible. For notification packets and
593 * SKBs that fail to Rx correctly, add them back into the
594 * rx_free list for reuse later. */
595 spin_lock_irqsave(&rxq->lock, flags);
596 if (rxb->page != NULL) {
597 rxb->page_dma = dma_map_page(priv->bus.dev, rxb->page,
598 0, PAGE_SIZE << priv->hw_params.rx_page_order,
599 DMA_FROM_DEVICE);
600 list_add_tail(&rxb->list, &rxq->rx_free);
601 rxq->free_count++;
602 } else
603 list_add_tail(&rxb->list, &rxq->rx_used);
604
605 spin_unlock_irqrestore(&rxq->lock, flags);
606
607 i = (i + 1) & RX_QUEUE_MASK;
608 /* If there are a lot of unused frames,
609 * restock the Rx queue so ucode wont assert. */
610 if (fill_rx) {
611 count++;
612 if (count >= 8) {
613 rxq->read = i;
614 iwlagn_rx_replenish_now(priv);
615 count = 0;
616 }
617 }
618 }
619
620 /* Backtrack one entry */
621 rxq->read = i;
622 if (fill_rx)
623 iwlagn_rx_replenish_now(priv);
624 else
625 iwlagn_rx_queue_restock(priv);
626 }
627
628 /* tasklet for iwlagn interrupt */
629 static void iwl_irq_tasklet(struct iwl_priv *priv)
630 {
631 u32 inta = 0;
632 u32 handled = 0;
633 unsigned long flags;
634 u32 i;
635 #ifdef CONFIG_IWLWIFI_DEBUG
636 u32 inta_mask;
637 #endif
638
639 spin_lock_irqsave(&priv->lock, flags);
640
641 /* Ack/clear/reset pending uCode interrupts.
642 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
643 */
644 /* There is a hardware bug in the interrupt mask function that some
645 * interrupts (i.e. CSR_INT_BIT_SCD) can still be generated even if
646 * they are disabled in the CSR_INT_MASK register. Furthermore the
647 * ICT interrupt handling mechanism has another bug that might cause
648 * these unmasked interrupts fail to be detected. We workaround the
649 * hardware bugs here by ACKing all the possible interrupts so that
650 * interrupt coalescing can still be achieved.
651 */
652 iwl_write32(priv, CSR_INT, priv->_agn.inta | ~priv->inta_mask);
653
654 inta = priv->_agn.inta;
655
656 #ifdef CONFIG_IWLWIFI_DEBUG
657 if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
658 /* just for debug */
659 inta_mask = iwl_read32(priv, CSR_INT_MASK);
660 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
661 inta, inta_mask);
662 }
663 #endif
664
665 spin_unlock_irqrestore(&priv->lock, flags);
666
667 /* saved interrupt in inta variable now we can reset priv->_agn.inta */
668 priv->_agn.inta = 0;
669
670 /* Now service all interrupt bits discovered above. */
671 if (inta & CSR_INT_BIT_HW_ERR) {
672 IWL_ERR(priv, "Hardware error detected. Restarting.\n");
673
674 /* Tell the device to stop sending interrupts */
675 iwl_disable_interrupts(priv);
676
677 priv->isr_stats.hw++;
678 iwl_irq_handle_error(priv);
679
680 handled |= CSR_INT_BIT_HW_ERR;
681
682 return;
683 }
684
685 #ifdef CONFIG_IWLWIFI_DEBUG
686 if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
687 /* NIC fires this, but we don't use it, redundant with WAKEUP */
688 if (inta & CSR_INT_BIT_SCD) {
689 IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
690 "the frame/frames.\n");
691 priv->isr_stats.sch++;
692 }
693
694 /* Alive notification via Rx interrupt will do the real work */
695 if (inta & CSR_INT_BIT_ALIVE) {
696 IWL_DEBUG_ISR(priv, "Alive interrupt\n");
697 priv->isr_stats.alive++;
698 }
699 }
700 #endif
701 /* Safely ignore these bits for debug checks below */
702 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
703
704 /* HW RF KILL switch toggled */
705 if (inta & CSR_INT_BIT_RF_KILL) {
706 int hw_rf_kill = 0;
707 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
708 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
709 hw_rf_kill = 1;
710
711 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
712 hw_rf_kill ? "disable radio" : "enable radio");
713
714 priv->isr_stats.rfkill++;
715
716 /* driver only loads ucode once setting the interface up.
717 * the driver allows loading the ucode even if the radio
718 * is killed. Hence update the killswitch state here. The
719 * rfkill handler will care about restarting if needed.
720 */
721 if (!test_bit(STATUS_ALIVE, &priv->status)) {
722 if (hw_rf_kill)
723 set_bit(STATUS_RF_KILL_HW, &priv->status);
724 else
725 clear_bit(STATUS_RF_KILL_HW, &priv->status);
726 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
727 }
728
729 handled |= CSR_INT_BIT_RF_KILL;
730 }
731
732 /* Chip got too hot and stopped itself */
733 if (inta & CSR_INT_BIT_CT_KILL) {
734 IWL_ERR(priv, "Microcode CT kill error detected.\n");
735 priv->isr_stats.ctkill++;
736 handled |= CSR_INT_BIT_CT_KILL;
737 }
738
739 /* Error detected by uCode */
740 if (inta & CSR_INT_BIT_SW_ERR) {
741 IWL_ERR(priv, "Microcode SW error detected. "
742 " Restarting 0x%X.\n", inta);
743 priv->isr_stats.sw++;
744 iwl_irq_handle_error(priv);
745 handled |= CSR_INT_BIT_SW_ERR;
746 }
747
748 /* uCode wakes up after power-down sleep */
749 if (inta & CSR_INT_BIT_WAKEUP) {
750 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
751 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
752 for (i = 0; i < priv->hw_params.max_txq_num; i++)
753 iwl_txq_update_write_ptr(priv, &priv->txq[i]);
754
755 priv->isr_stats.wakeup++;
756
757 handled |= CSR_INT_BIT_WAKEUP;
758 }
759
760 /* All uCode command responses, including Tx command responses,
761 * Rx "responses" (frame-received notification), and other
762 * notifications from uCode come through here*/
763 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
764 CSR_INT_BIT_RX_PERIODIC)) {
765 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
766 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
767 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
768 iwl_write32(priv, CSR_FH_INT_STATUS,
769 CSR_FH_INT_RX_MASK);
770 }
771 if (inta & CSR_INT_BIT_RX_PERIODIC) {
772 handled |= CSR_INT_BIT_RX_PERIODIC;
773 iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
774 }
775 /* Sending RX interrupt require many steps to be done in the
776 * the device:
777 * 1- write interrupt to current index in ICT table.
778 * 2- dma RX frame.
779 * 3- update RX shared data to indicate last write index.
780 * 4- send interrupt.
781 * This could lead to RX race, driver could receive RX interrupt
782 * but the shared data changes does not reflect this;
783 * periodic interrupt will detect any dangling Rx activity.
784 */
785
786 /* Disable periodic interrupt; we use it as just a one-shot. */
787 iwl_write8(priv, CSR_INT_PERIODIC_REG,
788 CSR_INT_PERIODIC_DIS);
789 iwl_rx_handle(priv);
790
791 /*
792 * Enable periodic interrupt in 8 msec only if we received
793 * real RX interrupt (instead of just periodic int), to catch
794 * any dangling Rx interrupt. If it was just the periodic
795 * interrupt, there was no dangling Rx activity, and no need
796 * to extend the periodic interrupt; one-shot is enough.
797 */
798 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
799 iwl_write8(priv, CSR_INT_PERIODIC_REG,
800 CSR_INT_PERIODIC_ENA);
801
802 priv->isr_stats.rx++;
803 }
804
805 /* This "Tx" DMA channel is used only for loading uCode */
806 if (inta & CSR_INT_BIT_FH_TX) {
807 iwl_write32(priv, CSR_FH_INT_STATUS, CSR_FH_INT_TX_MASK);
808 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
809 priv->isr_stats.tx++;
810 handled |= CSR_INT_BIT_FH_TX;
811 /* Wake up uCode load routine, now that load is complete */
812 priv->ucode_write_complete = 1;
813 wake_up_interruptible(&priv->wait_command_queue);
814 }
815
816 if (inta & ~handled) {
817 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
818 priv->isr_stats.unhandled++;
819 }
820
821 if (inta & ~(priv->inta_mask)) {
822 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
823 inta & ~priv->inta_mask);
824 }
825
826 /* Re-enable all interrupts */
827 /* only Re-enable if disabled by irq */
828 if (test_bit(STATUS_INT_ENABLED, &priv->status))
829 iwl_enable_interrupts(priv);
830 /* Re-enable RF_KILL if it occurred */
831 else if (handled & CSR_INT_BIT_RF_KILL)
832 iwl_enable_rfkill_int(priv);
833 }
834
835 /*****************************************************************************
836 *
837 * sysfs attributes
838 *
839 *****************************************************************************/
840
841 #ifdef CONFIG_IWLWIFI_DEBUG
842
843 /*
844 * The following adds a new attribute to the sysfs representation
845 * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
846 * used for controlling the debug level.
847 *
848 * See the level definitions in iwl for details.
849 *
850 * The debug_level being managed using sysfs below is a per device debug
851 * level that is used instead of the global debug level if it (the per
852 * device debug level) is set.
853 */
854 static ssize_t show_debug_level(struct device *d,
855 struct device_attribute *attr, char *buf)
856 {
857 struct iwl_priv *priv = dev_get_drvdata(d);
858 return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
859 }
860 static ssize_t store_debug_level(struct device *d,
861 struct device_attribute *attr,
862 const char *buf, size_t count)
863 {
864 struct iwl_priv *priv = dev_get_drvdata(d);
865 unsigned long val;
866 int ret;
867
868 ret = strict_strtoul(buf, 0, &val);
869 if (ret)
870 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
871 else {
872 priv->debug_level = val;
873 if (iwl_alloc_traffic_mem(priv))
874 IWL_ERR(priv,
875 "Not enough memory to generate traffic log\n");
876 }
877 return strnlen(buf, count);
878 }
879
880 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
881 show_debug_level, store_debug_level);
882
883
884 #endif /* CONFIG_IWLWIFI_DEBUG */
885
886
887 static ssize_t show_temperature(struct device *d,
888 struct device_attribute *attr, char *buf)
889 {
890 struct iwl_priv *priv = dev_get_drvdata(d);
891
892 if (!iwl_is_alive(priv))
893 return -EAGAIN;
894
895 return sprintf(buf, "%d\n", priv->temperature);
896 }
897
898 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
899
900 static ssize_t show_tx_power(struct device *d,
901 struct device_attribute *attr, char *buf)
902 {
903 struct iwl_priv *priv = dev_get_drvdata(d);
904
905 if (!iwl_is_ready_rf(priv))
906 return sprintf(buf, "off\n");
907 else
908 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
909 }
910
911 static ssize_t store_tx_power(struct device *d,
912 struct device_attribute *attr,
913 const char *buf, size_t count)
914 {
915 struct iwl_priv *priv = dev_get_drvdata(d);
916 unsigned long val;
917 int ret;
918
919 ret = strict_strtoul(buf, 10, &val);
920 if (ret)
921 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
922 else {
923 ret = iwl_set_tx_power(priv, val, false);
924 if (ret)
925 IWL_ERR(priv, "failed setting tx power (0x%d).\n",
926 ret);
927 else
928 ret = count;
929 }
930 return ret;
931 }
932
933 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
934
935 static struct attribute *iwl_sysfs_entries[] = {
936 &dev_attr_temperature.attr,
937 &dev_attr_tx_power.attr,
938 #ifdef CONFIG_IWLWIFI_DEBUG
939 &dev_attr_debug_level.attr,
940 #endif
941 NULL
942 };
943
944 static struct attribute_group iwl_attribute_group = {
945 .name = NULL, /* put in device directory */
946 .attrs = iwl_sysfs_entries,
947 };
948
949 /******************************************************************************
950 *
951 * uCode download functions
952 *
953 ******************************************************************************/
954
955 static void iwl_free_fw_desc(struct iwl_priv *priv, struct fw_desc *desc)
956 {
957 if (desc->v_addr)
958 dma_free_coherent(priv->bus.dev, desc->len,
959 desc->v_addr, desc->p_addr);
960 desc->v_addr = NULL;
961 desc->len = 0;
962 }
963
964 static void iwl_free_fw_img(struct iwl_priv *priv, struct fw_img *img)
965 {
966 iwl_free_fw_desc(priv, &img->code);
967 iwl_free_fw_desc(priv, &img->data);
968 }
969
970 static void iwl_dealloc_ucode(struct iwl_priv *priv)
971 {
972 iwl_free_fw_img(priv, &priv->ucode_rt);
973 iwl_free_fw_img(priv, &priv->ucode_init);
974 }
975
976 static int iwl_alloc_fw_desc(struct iwl_priv *priv, struct fw_desc *desc,
977 const void *data, size_t len)
978 {
979 if (!len) {
980 desc->v_addr = NULL;
981 return -EINVAL;
982 }
983
984 desc->v_addr = dma_alloc_coherent(priv->bus.dev, len,
985 &desc->p_addr, GFP_KERNEL);
986 if (!desc->v_addr)
987 return -ENOMEM;
988
989 desc->len = len;
990 memcpy(desc->v_addr, data, len);
991 return 0;
992 }
993
994 struct iwlagn_ucode_capabilities {
995 u32 max_probe_length;
996 u32 standard_phy_calibration_size;
997 u32 flags;
998 };
999
1000 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
1001 static int iwl_mac_setup_register(struct iwl_priv *priv,
1002 struct iwlagn_ucode_capabilities *capa);
1003
1004 #define UCODE_EXPERIMENTAL_INDEX 100
1005 #define UCODE_EXPERIMENTAL_TAG "exp"
1006
1007 static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first)
1008 {
1009 const char *name_pre = priv->cfg->fw_name_pre;
1010 char tag[8];
1011
1012 if (first) {
1013 #ifdef CONFIG_IWLWIFI_DEBUG_EXPERIMENTAL_UCODE
1014 priv->fw_index = UCODE_EXPERIMENTAL_INDEX;
1015 strcpy(tag, UCODE_EXPERIMENTAL_TAG);
1016 } else if (priv->fw_index == UCODE_EXPERIMENTAL_INDEX) {
1017 #endif
1018 priv->fw_index = priv->cfg->ucode_api_max;
1019 sprintf(tag, "%d", priv->fw_index);
1020 } else {
1021 priv->fw_index--;
1022 sprintf(tag, "%d", priv->fw_index);
1023 }
1024
1025 if (priv->fw_index < priv->cfg->ucode_api_min) {
1026 IWL_ERR(priv, "no suitable firmware found!\n");
1027 return -ENOENT;
1028 }
1029
1030 sprintf(priv->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
1031
1032 IWL_DEBUG_INFO(priv, "attempting to load firmware %s'%s'\n",
1033 (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1034 ? "EXPERIMENTAL " : "",
1035 priv->firmware_name);
1036
1037 return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name,
1038 priv->bus.dev,
1039 GFP_KERNEL, priv, iwl_ucode_callback);
1040 }
1041
1042 struct iwlagn_firmware_pieces {
1043 const void *inst, *data, *init, *init_data;
1044 size_t inst_size, data_size, init_size, init_data_size;
1045
1046 u32 build;
1047
1048 u32 init_evtlog_ptr, init_evtlog_size, init_errlog_ptr;
1049 u32 inst_evtlog_ptr, inst_evtlog_size, inst_errlog_ptr;
1050 };
1051
1052 static int iwlagn_load_legacy_firmware(struct iwl_priv *priv,
1053 const struct firmware *ucode_raw,
1054 struct iwlagn_firmware_pieces *pieces)
1055 {
1056 struct iwl_ucode_header *ucode = (void *)ucode_raw->data;
1057 u32 api_ver, hdr_size;
1058 const u8 *src;
1059
1060 priv->ucode_ver = le32_to_cpu(ucode->ver);
1061 api_ver = IWL_UCODE_API(priv->ucode_ver);
1062
1063 switch (api_ver) {
1064 default:
1065 hdr_size = 28;
1066 if (ucode_raw->size < hdr_size) {
1067 IWL_ERR(priv, "File size too small!\n");
1068 return -EINVAL;
1069 }
1070 pieces->build = le32_to_cpu(ucode->u.v2.build);
1071 pieces->inst_size = le32_to_cpu(ucode->u.v2.inst_size);
1072 pieces->data_size = le32_to_cpu(ucode->u.v2.data_size);
1073 pieces->init_size = le32_to_cpu(ucode->u.v2.init_size);
1074 pieces->init_data_size = le32_to_cpu(ucode->u.v2.init_data_size);
1075 src = ucode->u.v2.data;
1076 break;
1077 case 0:
1078 case 1:
1079 case 2:
1080 hdr_size = 24;
1081 if (ucode_raw->size < hdr_size) {
1082 IWL_ERR(priv, "File size too small!\n");
1083 return -EINVAL;
1084 }
1085 pieces->build = 0;
1086 pieces->inst_size = le32_to_cpu(ucode->u.v1.inst_size);
1087 pieces->data_size = le32_to_cpu(ucode->u.v1.data_size);
1088 pieces->init_size = le32_to_cpu(ucode->u.v1.init_size);
1089 pieces->init_data_size = le32_to_cpu(ucode->u.v1.init_data_size);
1090 src = ucode->u.v1.data;
1091 break;
1092 }
1093
1094 /* Verify size of file vs. image size info in file's header */
1095 if (ucode_raw->size != hdr_size + pieces->inst_size +
1096 pieces->data_size + pieces->init_size +
1097 pieces->init_data_size) {
1098
1099 IWL_ERR(priv,
1100 "uCode file size %d does not match expected size\n",
1101 (int)ucode_raw->size);
1102 return -EINVAL;
1103 }
1104
1105 pieces->inst = src;
1106 src += pieces->inst_size;
1107 pieces->data = src;
1108 src += pieces->data_size;
1109 pieces->init = src;
1110 src += pieces->init_size;
1111 pieces->init_data = src;
1112 src += pieces->init_data_size;
1113
1114 return 0;
1115 }
1116
1117 static int iwlagn_wanted_ucode_alternative = 1;
1118
1119 static int iwlagn_load_firmware(struct iwl_priv *priv,
1120 const struct firmware *ucode_raw,
1121 struct iwlagn_firmware_pieces *pieces,
1122 struct iwlagn_ucode_capabilities *capa)
1123 {
1124 struct iwl_tlv_ucode_header *ucode = (void *)ucode_raw->data;
1125 struct iwl_ucode_tlv *tlv;
1126 size_t len = ucode_raw->size;
1127 const u8 *data;
1128 int wanted_alternative = iwlagn_wanted_ucode_alternative, tmp;
1129 u64 alternatives;
1130 u32 tlv_len;
1131 enum iwl_ucode_tlv_type tlv_type;
1132 const u8 *tlv_data;
1133
1134 if (len < sizeof(*ucode)) {
1135 IWL_ERR(priv, "uCode has invalid length: %zd\n", len);
1136 return -EINVAL;
1137 }
1138
1139 if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC)) {
1140 IWL_ERR(priv, "invalid uCode magic: 0X%x\n",
1141 le32_to_cpu(ucode->magic));
1142 return -EINVAL;
1143 }
1144
1145 /*
1146 * Check which alternatives are present, and "downgrade"
1147 * when the chosen alternative is not present, warning
1148 * the user when that happens. Some files may not have
1149 * any alternatives, so don't warn in that case.
1150 */
1151 alternatives = le64_to_cpu(ucode->alternatives);
1152 tmp = wanted_alternative;
1153 if (wanted_alternative > 63)
1154 wanted_alternative = 63;
1155 while (wanted_alternative && !(alternatives & BIT(wanted_alternative)))
1156 wanted_alternative--;
1157 if (wanted_alternative && wanted_alternative != tmp)
1158 IWL_WARN(priv,
1159 "uCode alternative %d not available, choosing %d\n",
1160 tmp, wanted_alternative);
1161
1162 priv->ucode_ver = le32_to_cpu(ucode->ver);
1163 pieces->build = le32_to_cpu(ucode->build);
1164 data = ucode->data;
1165
1166 len -= sizeof(*ucode);
1167
1168 while (len >= sizeof(*tlv)) {
1169 u16 tlv_alt;
1170
1171 len -= sizeof(*tlv);
1172 tlv = (void *)data;
1173
1174 tlv_len = le32_to_cpu(tlv->length);
1175 tlv_type = le16_to_cpu(tlv->type);
1176 tlv_alt = le16_to_cpu(tlv->alternative);
1177 tlv_data = tlv->data;
1178
1179 if (len < tlv_len) {
1180 IWL_ERR(priv, "invalid TLV len: %zd/%u\n",
1181 len, tlv_len);
1182 return -EINVAL;
1183 }
1184 len -= ALIGN(tlv_len, 4);
1185 data += sizeof(*tlv) + ALIGN(tlv_len, 4);
1186
1187 /*
1188 * Alternative 0 is always valid.
1189 *
1190 * Skip alternative TLVs that are not selected.
1191 */
1192 if (tlv_alt != 0 && tlv_alt != wanted_alternative)
1193 continue;
1194
1195 switch (tlv_type) {
1196 case IWL_UCODE_TLV_INST:
1197 pieces->inst = tlv_data;
1198 pieces->inst_size = tlv_len;
1199 break;
1200 case IWL_UCODE_TLV_DATA:
1201 pieces->data = tlv_data;
1202 pieces->data_size = tlv_len;
1203 break;
1204 case IWL_UCODE_TLV_INIT:
1205 pieces->init = tlv_data;
1206 pieces->init_size = tlv_len;
1207 break;
1208 case IWL_UCODE_TLV_INIT_DATA:
1209 pieces->init_data = tlv_data;
1210 pieces->init_data_size = tlv_len;
1211 break;
1212 case IWL_UCODE_TLV_BOOT:
1213 IWL_ERR(priv, "Found unexpected BOOT ucode\n");
1214 break;
1215 case IWL_UCODE_TLV_PROBE_MAX_LEN:
1216 if (tlv_len != sizeof(u32))
1217 goto invalid_tlv_len;
1218 capa->max_probe_length =
1219 le32_to_cpup((__le32 *)tlv_data);
1220 break;
1221 case IWL_UCODE_TLV_PAN:
1222 if (tlv_len)
1223 goto invalid_tlv_len;
1224 capa->flags |= IWL_UCODE_TLV_FLAGS_PAN;
1225 break;
1226 case IWL_UCODE_TLV_FLAGS:
1227 /* must be at least one u32 */
1228 if (tlv_len < sizeof(u32))
1229 goto invalid_tlv_len;
1230 /* and a proper number of u32s */
1231 if (tlv_len % sizeof(u32))
1232 goto invalid_tlv_len;
1233 /*
1234 * This driver only reads the first u32 as
1235 * right now no more features are defined,
1236 * if that changes then either the driver
1237 * will not work with the new firmware, or
1238 * it'll not take advantage of new features.
1239 */
1240 capa->flags = le32_to_cpup((__le32 *)tlv_data);
1241 break;
1242 case IWL_UCODE_TLV_INIT_EVTLOG_PTR:
1243 if (tlv_len != sizeof(u32))
1244 goto invalid_tlv_len;
1245 pieces->init_evtlog_ptr =
1246 le32_to_cpup((__le32 *)tlv_data);
1247 break;
1248 case IWL_UCODE_TLV_INIT_EVTLOG_SIZE:
1249 if (tlv_len != sizeof(u32))
1250 goto invalid_tlv_len;
1251 pieces->init_evtlog_size =
1252 le32_to_cpup((__le32 *)tlv_data);
1253 break;
1254 case IWL_UCODE_TLV_INIT_ERRLOG_PTR:
1255 if (tlv_len != sizeof(u32))
1256 goto invalid_tlv_len;
1257 pieces->init_errlog_ptr =
1258 le32_to_cpup((__le32 *)tlv_data);
1259 break;
1260 case IWL_UCODE_TLV_RUNT_EVTLOG_PTR:
1261 if (tlv_len != sizeof(u32))
1262 goto invalid_tlv_len;
1263 pieces->inst_evtlog_ptr =
1264 le32_to_cpup((__le32 *)tlv_data);
1265 break;
1266 case IWL_UCODE_TLV_RUNT_EVTLOG_SIZE:
1267 if (tlv_len != sizeof(u32))
1268 goto invalid_tlv_len;
1269 pieces->inst_evtlog_size =
1270 le32_to_cpup((__le32 *)tlv_data);
1271 break;
1272 case IWL_UCODE_TLV_RUNT_ERRLOG_PTR:
1273 if (tlv_len != sizeof(u32))
1274 goto invalid_tlv_len;
1275 pieces->inst_errlog_ptr =
1276 le32_to_cpup((__le32 *)tlv_data);
1277 break;
1278 case IWL_UCODE_TLV_ENHANCE_SENS_TBL:
1279 if (tlv_len)
1280 goto invalid_tlv_len;
1281 priv->enhance_sensitivity_table = true;
1282 break;
1283 case IWL_UCODE_TLV_PHY_CALIBRATION_SIZE:
1284 if (tlv_len != sizeof(u32))
1285 goto invalid_tlv_len;
1286 capa->standard_phy_calibration_size =
1287 le32_to_cpup((__le32 *)tlv_data);
1288 break;
1289 default:
1290 IWL_DEBUG_INFO(priv, "unknown TLV: %d\n", tlv_type);
1291 break;
1292 }
1293 }
1294
1295 if (len) {
1296 IWL_ERR(priv, "invalid TLV after parsing: %zd\n", len);
1297 iwl_print_hex_dump(priv, IWL_DL_FW, (u8 *)data, len);
1298 return -EINVAL;
1299 }
1300
1301 return 0;
1302
1303 invalid_tlv_len:
1304 IWL_ERR(priv, "TLV %d has invalid size: %u\n", tlv_type, tlv_len);
1305 iwl_print_hex_dump(priv, IWL_DL_FW, tlv_data, tlv_len);
1306
1307 return -EINVAL;
1308 }
1309
1310 /**
1311 * iwl_ucode_callback - callback when firmware was loaded
1312 *
1313 * If loaded successfully, copies the firmware into buffers
1314 * for the card to fetch (via DMA).
1315 */
1316 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
1317 {
1318 struct iwl_priv *priv = context;
1319 struct iwl_ucode_header *ucode;
1320 int err;
1321 struct iwlagn_firmware_pieces pieces;
1322 const unsigned int api_max = priv->cfg->ucode_api_max;
1323 const unsigned int api_min = priv->cfg->ucode_api_min;
1324 u32 api_ver;
1325 char buildstr[25];
1326 u32 build;
1327 struct iwlagn_ucode_capabilities ucode_capa = {
1328 .max_probe_length = 200,
1329 .standard_phy_calibration_size =
1330 IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE,
1331 };
1332
1333 memset(&pieces, 0, sizeof(pieces));
1334
1335 if (!ucode_raw) {
1336 if (priv->fw_index <= priv->cfg->ucode_api_max)
1337 IWL_ERR(priv,
1338 "request for firmware file '%s' failed.\n",
1339 priv->firmware_name);
1340 goto try_again;
1341 }
1342
1343 IWL_DEBUG_INFO(priv, "Loaded firmware file '%s' (%zd bytes).\n",
1344 priv->firmware_name, ucode_raw->size);
1345
1346 /* Make sure that we got at least the API version number */
1347 if (ucode_raw->size < 4) {
1348 IWL_ERR(priv, "File size way too small!\n");
1349 goto try_again;
1350 }
1351
1352 /* Data from ucode file: header followed by uCode images */
1353 ucode = (struct iwl_ucode_header *)ucode_raw->data;
1354
1355 if (ucode->ver)
1356 err = iwlagn_load_legacy_firmware(priv, ucode_raw, &pieces);
1357 else
1358 err = iwlagn_load_firmware(priv, ucode_raw, &pieces,
1359 &ucode_capa);
1360
1361 if (err)
1362 goto try_again;
1363
1364 api_ver = IWL_UCODE_API(priv->ucode_ver);
1365 build = pieces.build;
1366
1367 /*
1368 * api_ver should match the api version forming part of the
1369 * firmware filename ... but we don't check for that and only rely
1370 * on the API version read from firmware header from here on forward
1371 */
1372 /* no api version check required for experimental uCode */
1373 if (priv->fw_index != UCODE_EXPERIMENTAL_INDEX) {
1374 if (api_ver < api_min || api_ver > api_max) {
1375 IWL_ERR(priv,
1376 "Driver unable to support your firmware API. "
1377 "Driver supports v%u, firmware is v%u.\n",
1378 api_max, api_ver);
1379 goto try_again;
1380 }
1381
1382 if (api_ver != api_max)
1383 IWL_ERR(priv,
1384 "Firmware has old API version. Expected v%u, "
1385 "got v%u. New firmware can be obtained "
1386 "from http://www.intellinuxwireless.org.\n",
1387 api_max, api_ver);
1388 }
1389
1390 if (build)
1391 sprintf(buildstr, " build %u%s", build,
1392 (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1393 ? " (EXP)" : "");
1394 else
1395 buildstr[0] = '\0';
1396
1397 IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u%s\n",
1398 IWL_UCODE_MAJOR(priv->ucode_ver),
1399 IWL_UCODE_MINOR(priv->ucode_ver),
1400 IWL_UCODE_API(priv->ucode_ver),
1401 IWL_UCODE_SERIAL(priv->ucode_ver),
1402 buildstr);
1403
1404 snprintf(priv->hw->wiphy->fw_version,
1405 sizeof(priv->hw->wiphy->fw_version),
1406 "%u.%u.%u.%u%s",
1407 IWL_UCODE_MAJOR(priv->ucode_ver),
1408 IWL_UCODE_MINOR(priv->ucode_ver),
1409 IWL_UCODE_API(priv->ucode_ver),
1410 IWL_UCODE_SERIAL(priv->ucode_ver),
1411 buildstr);
1412
1413 /*
1414 * For any of the failures below (before allocating pci memory)
1415 * we will try to load a version with a smaller API -- maybe the
1416 * user just got a corrupted version of the latest API.
1417 */
1418
1419 IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1420 priv->ucode_ver);
1421 IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %Zd\n",
1422 pieces.inst_size);
1423 IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %Zd\n",
1424 pieces.data_size);
1425 IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %Zd\n",
1426 pieces.init_size);
1427 IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %Zd\n",
1428 pieces.init_data_size);
1429
1430 /* Verify that uCode images will fit in card's SRAM */
1431 if (pieces.inst_size > priv->hw_params.max_inst_size) {
1432 IWL_ERR(priv, "uCode instr len %Zd too large to fit in\n",
1433 pieces.inst_size);
1434 goto try_again;
1435 }
1436
1437 if (pieces.data_size > priv->hw_params.max_data_size) {
1438 IWL_ERR(priv, "uCode data len %Zd too large to fit in\n",
1439 pieces.data_size);
1440 goto try_again;
1441 }
1442
1443 if (pieces.init_size > priv->hw_params.max_inst_size) {
1444 IWL_ERR(priv, "uCode init instr len %Zd too large to fit in\n",
1445 pieces.init_size);
1446 goto try_again;
1447 }
1448
1449 if (pieces.init_data_size > priv->hw_params.max_data_size) {
1450 IWL_ERR(priv, "uCode init data len %Zd too large to fit in\n",
1451 pieces.init_data_size);
1452 goto try_again;
1453 }
1454
1455 /* Allocate ucode buffers for card's bus-master loading ... */
1456
1457 /* Runtime instructions and 2 copies of data:
1458 * 1) unmodified from disk
1459 * 2) backup cache for save/restore during power-downs */
1460 if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.code,
1461 pieces.inst, pieces.inst_size))
1462 goto err_pci_alloc;
1463 if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.data,
1464 pieces.data, pieces.data_size))
1465 goto err_pci_alloc;
1466
1467 /* Initialization instructions and data */
1468 if (pieces.init_size && pieces.init_data_size) {
1469 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.code,
1470 pieces.init, pieces.init_size))
1471 goto err_pci_alloc;
1472 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.data,
1473 pieces.init_data, pieces.init_data_size))
1474 goto err_pci_alloc;
1475 }
1476
1477 /* Now that we can no longer fail, copy information */
1478
1479 /*
1480 * The (size - 16) / 12 formula is based on the information recorded
1481 * for each event, which is of mode 1 (including timestamp) for all
1482 * new microcodes that include this information.
1483 */
1484 priv->_agn.init_evtlog_ptr = pieces.init_evtlog_ptr;
1485 if (pieces.init_evtlog_size)
1486 priv->_agn.init_evtlog_size = (pieces.init_evtlog_size - 16)/12;
1487 else
1488 priv->_agn.init_evtlog_size =
1489 priv->cfg->base_params->max_event_log_size;
1490 priv->_agn.init_errlog_ptr = pieces.init_errlog_ptr;
1491 priv->_agn.inst_evtlog_ptr = pieces.inst_evtlog_ptr;
1492 if (pieces.inst_evtlog_size)
1493 priv->_agn.inst_evtlog_size = (pieces.inst_evtlog_size - 16)/12;
1494 else
1495 priv->_agn.inst_evtlog_size =
1496 priv->cfg->base_params->max_event_log_size;
1497 priv->_agn.inst_errlog_ptr = pieces.inst_errlog_ptr;
1498
1499 priv->new_scan_threshold_behaviour =
1500 !!(ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1501
1502 if ((priv->cfg->sku & EEPROM_SKU_CAP_IPAN_ENABLE) &&
1503 (ucode_capa.flags & IWL_UCODE_TLV_FLAGS_PAN)) {
1504 priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
1505 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1506 } else
1507 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1508
1509 if (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS))
1510 priv->cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1511 else
1512 priv->cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1513
1514 /*
1515 * figure out the offset of chain noise reset and gain commands
1516 * base on the size of standard phy calibration commands table size
1517 */
1518 if (ucode_capa.standard_phy_calibration_size >
1519 IWL_MAX_PHY_CALIBRATE_TBL_SIZE)
1520 ucode_capa.standard_phy_calibration_size =
1521 IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE;
1522
1523 priv->_agn.phy_calib_chain_noise_reset_cmd =
1524 ucode_capa.standard_phy_calibration_size;
1525 priv->_agn.phy_calib_chain_noise_gain_cmd =
1526 ucode_capa.standard_phy_calibration_size + 1;
1527
1528 /**************************************************
1529 * This is still part of probe() in a sense...
1530 *
1531 * 9. Setup and register with mac80211 and debugfs
1532 **************************************************/
1533 err = iwl_mac_setup_register(priv, &ucode_capa);
1534 if (err)
1535 goto out_unbind;
1536
1537 err = iwl_dbgfs_register(priv, DRV_NAME);
1538 if (err)
1539 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
1540
1541 err = sysfs_create_group(&(priv->bus.dev->kobj),
1542 &iwl_attribute_group);
1543 if (err) {
1544 IWL_ERR(priv, "failed to create sysfs device attributes\n");
1545 goto out_unbind;
1546 }
1547
1548 /* We have our copies now, allow OS release its copies */
1549 release_firmware(ucode_raw);
1550 complete(&priv->_agn.firmware_loading_complete);
1551 return;
1552
1553 try_again:
1554 /* try next, if any */
1555 if (iwl_request_firmware(priv, false))
1556 goto out_unbind;
1557 release_firmware(ucode_raw);
1558 return;
1559
1560 err_pci_alloc:
1561 IWL_ERR(priv, "failed to allocate pci memory\n");
1562 iwl_dealloc_ucode(priv);
1563 out_unbind:
1564 complete(&priv->_agn.firmware_loading_complete);
1565 device_release_driver(priv->bus.dev);
1566 release_firmware(ucode_raw);
1567 }
1568
1569 static const char *desc_lookup_text[] = {
1570 "OK",
1571 "FAIL",
1572 "BAD_PARAM",
1573 "BAD_CHECKSUM",
1574 "NMI_INTERRUPT_WDG",
1575 "SYSASSERT",
1576 "FATAL_ERROR",
1577 "BAD_COMMAND",
1578 "HW_ERROR_TUNE_LOCK",
1579 "HW_ERROR_TEMPERATURE",
1580 "ILLEGAL_CHAN_FREQ",
1581 "VCC_NOT_STABLE",
1582 "FH_ERROR",
1583 "NMI_INTERRUPT_HOST",
1584 "NMI_INTERRUPT_ACTION_PT",
1585 "NMI_INTERRUPT_UNKNOWN",
1586 "UCODE_VERSION_MISMATCH",
1587 "HW_ERROR_ABS_LOCK",
1588 "HW_ERROR_CAL_LOCK_FAIL",
1589 "NMI_INTERRUPT_INST_ACTION_PT",
1590 "NMI_INTERRUPT_DATA_ACTION_PT",
1591 "NMI_TRM_HW_ER",
1592 "NMI_INTERRUPT_TRM",
1593 "NMI_INTERRUPT_BREAK_POINT"
1594 "DEBUG_0",
1595 "DEBUG_1",
1596 "DEBUG_2",
1597 "DEBUG_3",
1598 };
1599
1600 static struct { char *name; u8 num; } advanced_lookup[] = {
1601 { "NMI_INTERRUPT_WDG", 0x34 },
1602 { "SYSASSERT", 0x35 },
1603 { "UCODE_VERSION_MISMATCH", 0x37 },
1604 { "BAD_COMMAND", 0x38 },
1605 { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
1606 { "FATAL_ERROR", 0x3D },
1607 { "NMI_TRM_HW_ERR", 0x46 },
1608 { "NMI_INTERRUPT_TRM", 0x4C },
1609 { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
1610 { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
1611 { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
1612 { "NMI_INTERRUPT_HOST", 0x66 },
1613 { "NMI_INTERRUPT_ACTION_PT", 0x7C },
1614 { "NMI_INTERRUPT_UNKNOWN", 0x84 },
1615 { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
1616 { "ADVANCED_SYSASSERT", 0 },
1617 };
1618
1619 static const char *desc_lookup(u32 num)
1620 {
1621 int i;
1622 int max = ARRAY_SIZE(desc_lookup_text);
1623
1624 if (num < max)
1625 return desc_lookup_text[num];
1626
1627 max = ARRAY_SIZE(advanced_lookup) - 1;
1628 for (i = 0; i < max; i++) {
1629 if (advanced_lookup[i].num == num)
1630 break;
1631 }
1632 return advanced_lookup[i].name;
1633 }
1634
1635 #define ERROR_START_OFFSET (1 * sizeof(u32))
1636 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
1637
1638 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1639 {
1640 u32 base;
1641 struct iwl_error_event_table table;
1642
1643 base = priv->device_pointers.error_event_table;
1644 if (priv->ucode_type == IWL_UCODE_INIT) {
1645 if (!base)
1646 base = priv->_agn.init_errlog_ptr;
1647 } else {
1648 if (!base)
1649 base = priv->_agn.inst_errlog_ptr;
1650 }
1651
1652 if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1653 IWL_ERR(priv,
1654 "Not valid error log pointer 0x%08X for %s uCode\n",
1655 base,
1656 (priv->ucode_type == IWL_UCODE_INIT)
1657 ? "Init" : "RT");
1658 return;
1659 }
1660
1661 iwl_read_targ_mem_words(priv, base, &table, sizeof(table));
1662
1663 if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
1664 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1665 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1666 priv->status, table.valid);
1667 }
1668
1669 priv->isr_stats.err_code = table.error_id;
1670
1671 trace_iwlwifi_dev_ucode_error(priv, table.error_id, table.tsf_low,
1672 table.data1, table.data2, table.line,
1673 table.blink1, table.blink2, table.ilink1,
1674 table.ilink2, table.bcon_time, table.gp1,
1675 table.gp2, table.gp3, table.ucode_ver,
1676 table.hw_ver, table.brd_ver);
1677 IWL_ERR(priv, "0x%08X | %-28s\n", table.error_id,
1678 desc_lookup(table.error_id));
1679 IWL_ERR(priv, "0x%08X | uPc\n", table.pc);
1680 IWL_ERR(priv, "0x%08X | branchlink1\n", table.blink1);
1681 IWL_ERR(priv, "0x%08X | branchlink2\n", table.blink2);
1682 IWL_ERR(priv, "0x%08X | interruptlink1\n", table.ilink1);
1683 IWL_ERR(priv, "0x%08X | interruptlink2\n", table.ilink2);
1684 IWL_ERR(priv, "0x%08X | data1\n", table.data1);
1685 IWL_ERR(priv, "0x%08X | data2\n", table.data2);
1686 IWL_ERR(priv, "0x%08X | line\n", table.line);
1687 IWL_ERR(priv, "0x%08X | beacon time\n", table.bcon_time);
1688 IWL_ERR(priv, "0x%08X | tsf low\n", table.tsf_low);
1689 IWL_ERR(priv, "0x%08X | tsf hi\n", table.tsf_hi);
1690 IWL_ERR(priv, "0x%08X | time gp1\n", table.gp1);
1691 IWL_ERR(priv, "0x%08X | time gp2\n", table.gp2);
1692 IWL_ERR(priv, "0x%08X | time gp3\n", table.gp3);
1693 IWL_ERR(priv, "0x%08X | uCode version\n", table.ucode_ver);
1694 IWL_ERR(priv, "0x%08X | hw version\n", table.hw_ver);
1695 IWL_ERR(priv, "0x%08X | board version\n", table.brd_ver);
1696 IWL_ERR(priv, "0x%08X | hcmd\n", table.hcmd);
1697 }
1698
1699 #define EVENT_START_OFFSET (4 * sizeof(u32))
1700
1701 /**
1702 * iwl_print_event_log - Dump error event log to syslog
1703 *
1704 */
1705 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1706 u32 num_events, u32 mode,
1707 int pos, char **buf, size_t bufsz)
1708 {
1709 u32 i;
1710 u32 base; /* SRAM byte address of event log header */
1711 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1712 u32 ptr; /* SRAM byte address of log data */
1713 u32 ev, time, data; /* event log data */
1714 unsigned long reg_flags;
1715
1716 if (num_events == 0)
1717 return pos;
1718
1719 base = priv->device_pointers.log_event_table;
1720 if (priv->ucode_type == IWL_UCODE_INIT) {
1721 if (!base)
1722 base = priv->_agn.init_evtlog_ptr;
1723 } else {
1724 if (!base)
1725 base = priv->_agn.inst_evtlog_ptr;
1726 }
1727
1728 if (mode == 0)
1729 event_size = 2 * sizeof(u32);
1730 else
1731 event_size = 3 * sizeof(u32);
1732
1733 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1734
1735 /* Make sure device is powered up for SRAM reads */
1736 spin_lock_irqsave(&priv->reg_lock, reg_flags);
1737 iwl_grab_nic_access(priv);
1738
1739 /* Set starting address; reads will auto-increment */
1740 iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
1741 rmb();
1742
1743 /* "time" is actually "data" for mode 0 (no timestamp).
1744 * place event id # at far right for easier visual parsing. */
1745 for (i = 0; i < num_events; i++) {
1746 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1747 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1748 if (mode == 0) {
1749 /* data, ev */
1750 if (bufsz) {
1751 pos += scnprintf(*buf + pos, bufsz - pos,
1752 "EVT_LOG:0x%08x:%04u\n",
1753 time, ev);
1754 } else {
1755 trace_iwlwifi_dev_ucode_event(priv, 0,
1756 time, ev);
1757 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1758 time, ev);
1759 }
1760 } else {
1761 data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1762 if (bufsz) {
1763 pos += scnprintf(*buf + pos, bufsz - pos,
1764 "EVT_LOGT:%010u:0x%08x:%04u\n",
1765 time, data, ev);
1766 } else {
1767 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1768 time, data, ev);
1769 trace_iwlwifi_dev_ucode_event(priv, time,
1770 data, ev);
1771 }
1772 }
1773 }
1774
1775 /* Allow device to power down */
1776 iwl_release_nic_access(priv);
1777 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1778 return pos;
1779 }
1780
1781 /**
1782 * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1783 */
1784 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1785 u32 num_wraps, u32 next_entry,
1786 u32 size, u32 mode,
1787 int pos, char **buf, size_t bufsz)
1788 {
1789 /*
1790 * display the newest DEFAULT_LOG_ENTRIES entries
1791 * i.e the entries just before the next ont that uCode would fill.
1792 */
1793 if (num_wraps) {
1794 if (next_entry < size) {
1795 pos = iwl_print_event_log(priv,
1796 capacity - (size - next_entry),
1797 size - next_entry, mode,
1798 pos, buf, bufsz);
1799 pos = iwl_print_event_log(priv, 0,
1800 next_entry, mode,
1801 pos, buf, bufsz);
1802 } else
1803 pos = iwl_print_event_log(priv, next_entry - size,
1804 size, mode, pos, buf, bufsz);
1805 } else {
1806 if (next_entry < size) {
1807 pos = iwl_print_event_log(priv, 0, next_entry,
1808 mode, pos, buf, bufsz);
1809 } else {
1810 pos = iwl_print_event_log(priv, next_entry - size,
1811 size, mode, pos, buf, bufsz);
1812 }
1813 }
1814 return pos;
1815 }
1816
1817 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1818
1819 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1820 char **buf, bool display)
1821 {
1822 u32 base; /* SRAM byte address of event log header */
1823 u32 capacity; /* event log capacity in # entries */
1824 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
1825 u32 num_wraps; /* # times uCode wrapped to top of log */
1826 u32 next_entry; /* index of next entry to be written by uCode */
1827 u32 size; /* # entries that we'll print */
1828 u32 logsize;
1829 int pos = 0;
1830 size_t bufsz = 0;
1831
1832 base = priv->device_pointers.log_event_table;
1833 if (priv->ucode_type == IWL_UCODE_INIT) {
1834 logsize = priv->_agn.init_evtlog_size;
1835 if (!base)
1836 base = priv->_agn.init_evtlog_ptr;
1837 } else {
1838 logsize = priv->_agn.inst_evtlog_size;
1839 if (!base)
1840 base = priv->_agn.inst_evtlog_ptr;
1841 }
1842
1843 if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1844 IWL_ERR(priv,
1845 "Invalid event log pointer 0x%08X for %s uCode\n",
1846 base,
1847 (priv->ucode_type == IWL_UCODE_INIT)
1848 ? "Init" : "RT");
1849 return -EINVAL;
1850 }
1851
1852 /* event log header */
1853 capacity = iwl_read_targ_mem(priv, base);
1854 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1855 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1856 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1857
1858 if (capacity > logsize) {
1859 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1860 capacity, logsize);
1861 capacity = logsize;
1862 }
1863
1864 if (next_entry > logsize) {
1865 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1866 next_entry, logsize);
1867 next_entry = logsize;
1868 }
1869
1870 size = num_wraps ? capacity : next_entry;
1871
1872 /* bail out if nothing in log */
1873 if (size == 0) {
1874 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1875 return pos;
1876 }
1877
1878 /* enable/disable bt channel inhibition */
1879 priv->bt_ch_announce = iwlagn_bt_ch_announce;
1880
1881 #ifdef CONFIG_IWLWIFI_DEBUG
1882 if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1883 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1884 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1885 #else
1886 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1887 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1888 #endif
1889 IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
1890 size);
1891
1892 #ifdef CONFIG_IWLWIFI_DEBUG
1893 if (display) {
1894 if (full_log)
1895 bufsz = capacity * 48;
1896 else
1897 bufsz = size * 48;
1898 *buf = kmalloc(bufsz, GFP_KERNEL);
1899 if (!*buf)
1900 return -ENOMEM;
1901 }
1902 if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1903 /*
1904 * if uCode has wrapped back to top of log,
1905 * start at the oldest entry,
1906 * i.e the next one that uCode would fill.
1907 */
1908 if (num_wraps)
1909 pos = iwl_print_event_log(priv, next_entry,
1910 capacity - next_entry, mode,
1911 pos, buf, bufsz);
1912 /* (then/else) start at top of log */
1913 pos = iwl_print_event_log(priv, 0,
1914 next_entry, mode, pos, buf, bufsz);
1915 } else
1916 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1917 next_entry, size, mode,
1918 pos, buf, bufsz);
1919 #else
1920 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1921 next_entry, size, mode,
1922 pos, buf, bufsz);
1923 #endif
1924 return pos;
1925 }
1926
1927 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1928 {
1929 struct iwl_ct_kill_config cmd;
1930 struct iwl_ct_kill_throttling_config adv_cmd;
1931 unsigned long flags;
1932 int ret = 0;
1933
1934 spin_lock_irqsave(&priv->lock, flags);
1935 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1936 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1937 spin_unlock_irqrestore(&priv->lock, flags);
1938 priv->thermal_throttle.ct_kill_toggle = false;
1939
1940 if (priv->cfg->base_params->support_ct_kill_exit) {
1941 adv_cmd.critical_temperature_enter =
1942 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1943 adv_cmd.critical_temperature_exit =
1944 cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1945
1946 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1947 sizeof(adv_cmd), &adv_cmd);
1948 if (ret)
1949 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1950 else
1951 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1952 "succeeded, "
1953 "critical temperature enter is %d,"
1954 "exit is %d\n",
1955 priv->hw_params.ct_kill_threshold,
1956 priv->hw_params.ct_kill_exit_threshold);
1957 } else {
1958 cmd.critical_temperature_R =
1959 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1960
1961 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1962 sizeof(cmd), &cmd);
1963 if (ret)
1964 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1965 else
1966 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1967 "succeeded, "
1968 "critical temperature is %d\n",
1969 priv->hw_params.ct_kill_threshold);
1970 }
1971 }
1972
1973 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
1974 {
1975 struct iwl_calib_cfg_cmd calib_cfg_cmd;
1976 struct iwl_host_cmd cmd = {
1977 .id = CALIBRATION_CFG_CMD,
1978 .len = { sizeof(struct iwl_calib_cfg_cmd), },
1979 .data = { &calib_cfg_cmd, },
1980 };
1981
1982 memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
1983 calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_INIT_CFG_ALL;
1984 calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
1985
1986 return iwl_send_cmd(priv, &cmd);
1987 }
1988
1989
1990 /**
1991 * iwl_alive_start - called after REPLY_ALIVE notification received
1992 * from protocol/runtime uCode (initialization uCode's
1993 * Alive gets handled by iwl_init_alive_start()).
1994 */
1995 int iwl_alive_start(struct iwl_priv *priv)
1996 {
1997 int ret = 0;
1998 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1999
2000 iwl_reset_ict(priv);
2001
2002 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2003
2004 /* After the ALIVE response, we can send host commands to the uCode */
2005 set_bit(STATUS_ALIVE, &priv->status);
2006
2007 /* Enable watchdog to monitor the driver tx queues */
2008 iwl_setup_watchdog(priv);
2009
2010 if (iwl_is_rfkill(priv))
2011 return -ERFKILL;
2012
2013 /* download priority table before any calibration request */
2014 if (priv->cfg->bt_params &&
2015 priv->cfg->bt_params->advanced_bt_coexist) {
2016 /* Configure Bluetooth device coexistence support */
2017 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
2018 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
2019 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
2020 priv->cfg->ops->hcmd->send_bt_config(priv);
2021 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
2022 iwlagn_send_prio_tbl(priv);
2023
2024 /* FIXME: w/a to force change uCode BT state machine */
2025 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
2026 BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2027 if (ret)
2028 return ret;
2029 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
2030 BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2031 if (ret)
2032 return ret;
2033 }
2034 if (priv->hw_params.calib_rt_cfg)
2035 iwlagn_send_calib_cfg_rt(priv, priv->hw_params.calib_rt_cfg);
2036
2037 ieee80211_wake_queues(priv->hw);
2038
2039 priv->active_rate = IWL_RATES_MASK;
2040
2041 /* Configure Tx antenna selection based on H/W config */
2042 if (priv->cfg->ops->hcmd->set_tx_ant)
2043 priv->cfg->ops->hcmd->set_tx_ant(priv, priv->cfg->valid_tx_ant);
2044
2045 if (iwl_is_associated_ctx(ctx)) {
2046 struct iwl_rxon_cmd *active_rxon =
2047 (struct iwl_rxon_cmd *)&ctx->active;
2048 /* apply any changes in staging */
2049 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2050 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2051 } else {
2052 struct iwl_rxon_context *tmp;
2053 /* Initialize our rx_config data */
2054 for_each_context(priv, tmp)
2055 iwl_connection_init_rx_config(priv, tmp);
2056
2057 if (priv->cfg->ops->hcmd->set_rxon_chain)
2058 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2059 }
2060
2061 if (!priv->cfg->bt_params || (priv->cfg->bt_params &&
2062 !priv->cfg->bt_params->advanced_bt_coexist)) {
2063 /*
2064 * default is 2-wire BT coexexistence support
2065 */
2066 priv->cfg->ops->hcmd->send_bt_config(priv);
2067 }
2068
2069 iwl_reset_run_time_calib(priv);
2070
2071 set_bit(STATUS_READY, &priv->status);
2072
2073 /* Configure the adapter for unassociated operation */
2074 ret = iwlagn_commit_rxon(priv, ctx);
2075 if (ret)
2076 return ret;
2077
2078 /* At this point, the NIC is initialized and operational */
2079 iwl_rf_kill_ct_config(priv);
2080
2081 IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2082
2083 return iwl_power_update_mode(priv, true);
2084 }
2085
2086 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2087
2088 static void __iwl_down(struct iwl_priv *priv)
2089 {
2090 int exit_pending;
2091
2092 IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2093
2094 iwl_scan_cancel_timeout(priv, 200);
2095
2096 exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
2097
2098 /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
2099 * to prevent rearm timer */
2100 del_timer_sync(&priv->watchdog);
2101
2102 iwl_clear_ucode_stations(priv, NULL);
2103 iwl_dealloc_bcast_stations(priv);
2104 iwl_clear_driver_stations(priv);
2105
2106 /* reset BT coex data */
2107 priv->bt_status = 0;
2108 if (priv->cfg->bt_params)
2109 priv->bt_traffic_load =
2110 priv->cfg->bt_params->bt_init_traffic_load;
2111 else
2112 priv->bt_traffic_load = 0;
2113 priv->bt_full_concurrent = false;
2114 priv->bt_ci_compliance = 0;
2115
2116 /* Wipe out the EXIT_PENDING status bit if we are not actually
2117 * exiting the module */
2118 if (!exit_pending)
2119 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2120
2121 if (priv->mac80211_registered)
2122 ieee80211_stop_queues(priv->hw);
2123
2124 /* Clear out all status bits but a few that are stable across reset */
2125 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2126 STATUS_RF_KILL_HW |
2127 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2128 STATUS_GEO_CONFIGURED |
2129 test_bit(STATUS_FW_ERROR, &priv->status) <<
2130 STATUS_FW_ERROR |
2131 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2132 STATUS_EXIT_PENDING;
2133
2134 iwlagn_stop_device(priv);
2135
2136 dev_kfree_skb(priv->beacon_skb);
2137 priv->beacon_skb = NULL;
2138 }
2139
2140 static void iwl_down(struct iwl_priv *priv)
2141 {
2142 mutex_lock(&priv->mutex);
2143 __iwl_down(priv);
2144 mutex_unlock(&priv->mutex);
2145
2146 iwl_cancel_deferred_work(priv);
2147 }
2148
2149 #define HW_READY_TIMEOUT (50)
2150
2151 /* Note: returns poll_bit return value, which is >= 0 if success */
2152 static int iwl_set_hw_ready(struct iwl_priv *priv)
2153 {
2154 int ret;
2155
2156 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2157 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2158
2159 /* See if we got it */
2160 ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2161 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2162 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2163 HW_READY_TIMEOUT);
2164
2165 IWL_DEBUG_INFO(priv, "hardware%s ready\n", ret < 0 ? " not" : "");
2166 return ret;
2167 }
2168
2169 /* Note: returns standard 0/-ERROR code */
2170 int iwl_prepare_card_hw(struct iwl_priv *priv)
2171 {
2172 int ret;
2173
2174 IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter\n");
2175
2176 ret = iwl_set_hw_ready(priv);
2177 if (ret >= 0)
2178 return 0;
2179
2180 /* If HW is not ready, prepare the conditions to check again */
2181 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2182 CSR_HW_IF_CONFIG_REG_PREPARE);
2183
2184 ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2185 ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2186 CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2187
2188 if (ret < 0)
2189 return ret;
2190
2191 /* HW should be ready by now, check again. */
2192 ret = iwl_set_hw_ready(priv);
2193 if (ret >= 0)
2194 return 0;
2195 return ret;
2196 }
2197
2198 #define MAX_HW_RESTARTS 5
2199
2200 static int __iwl_up(struct iwl_priv *priv)
2201 {
2202 struct iwl_rxon_context *ctx;
2203 int ret;
2204
2205 lockdep_assert_held(&priv->mutex);
2206
2207 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2208 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2209 return -EIO;
2210 }
2211
2212 for_each_context(priv, ctx) {
2213 ret = iwlagn_alloc_bcast_station(priv, ctx);
2214 if (ret) {
2215 iwl_dealloc_bcast_stations(priv);
2216 return ret;
2217 }
2218 }
2219
2220 ret = iwlagn_run_init_ucode(priv);
2221 if (ret) {
2222 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
2223 goto error;
2224 }
2225
2226 ret = iwlagn_load_ucode_wait_alive(priv,
2227 &priv->ucode_rt,
2228 IWL_UCODE_REGULAR);
2229 if (ret) {
2230 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
2231 goto error;
2232 }
2233
2234 ret = iwl_alive_start(priv);
2235 if (ret)
2236 goto error;
2237 return 0;
2238
2239 error:
2240 set_bit(STATUS_EXIT_PENDING, &priv->status);
2241 __iwl_down(priv);
2242 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2243
2244 IWL_ERR(priv, "Unable to initialize device.\n");
2245 return ret;
2246 }
2247
2248
2249 /*****************************************************************************
2250 *
2251 * Workqueue callbacks
2252 *
2253 *****************************************************************************/
2254
2255 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2256 {
2257 struct iwl_priv *priv = container_of(work, struct iwl_priv,
2258 run_time_calib_work);
2259
2260 mutex_lock(&priv->mutex);
2261
2262 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2263 test_bit(STATUS_SCANNING, &priv->status)) {
2264 mutex_unlock(&priv->mutex);
2265 return;
2266 }
2267
2268 if (priv->start_calib) {
2269 iwl_chain_noise_calibration(priv);
2270 iwl_sensitivity_calibration(priv);
2271 }
2272
2273 mutex_unlock(&priv->mutex);
2274 }
2275
2276 static void iwlagn_prepare_restart(struct iwl_priv *priv)
2277 {
2278 struct iwl_rxon_context *ctx;
2279 bool bt_full_concurrent;
2280 u8 bt_ci_compliance;
2281 u8 bt_load;
2282 u8 bt_status;
2283
2284 lockdep_assert_held(&priv->mutex);
2285
2286 for_each_context(priv, ctx)
2287 ctx->vif = NULL;
2288 priv->is_open = 0;
2289
2290 /*
2291 * __iwl_down() will clear the BT status variables,
2292 * which is correct, but when we restart we really
2293 * want to keep them so restore them afterwards.
2294 *
2295 * The restart process will later pick them up and
2296 * re-configure the hw when we reconfigure the BT
2297 * command.
2298 */
2299 bt_full_concurrent = priv->bt_full_concurrent;
2300 bt_ci_compliance = priv->bt_ci_compliance;
2301 bt_load = priv->bt_traffic_load;
2302 bt_status = priv->bt_status;
2303
2304 __iwl_down(priv);
2305
2306 priv->bt_full_concurrent = bt_full_concurrent;
2307 priv->bt_ci_compliance = bt_ci_compliance;
2308 priv->bt_traffic_load = bt_load;
2309 priv->bt_status = bt_status;
2310 }
2311
2312 static void iwl_bg_restart(struct work_struct *data)
2313 {
2314 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2315
2316 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2317 return;
2318
2319 if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2320 mutex_lock(&priv->mutex);
2321 iwlagn_prepare_restart(priv);
2322 mutex_unlock(&priv->mutex);
2323 iwl_cancel_deferred_work(priv);
2324 ieee80211_restart_hw(priv->hw);
2325 } else {
2326 WARN_ON(1);
2327 }
2328 }
2329
2330 static void iwl_bg_rx_replenish(struct work_struct *data)
2331 {
2332 struct iwl_priv *priv =
2333 container_of(data, struct iwl_priv, rx_replenish);
2334
2335 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2336 return;
2337
2338 mutex_lock(&priv->mutex);
2339 iwlagn_rx_replenish(priv);
2340 mutex_unlock(&priv->mutex);
2341 }
2342
2343 static int iwl_mac_offchannel_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
2344 struct ieee80211_channel *chan,
2345 enum nl80211_channel_type channel_type,
2346 unsigned int wait)
2347 {
2348 struct iwl_priv *priv = hw->priv;
2349 int ret;
2350
2351 /* Not supported if we don't have PAN */
2352 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) {
2353 ret = -EOPNOTSUPP;
2354 goto free;
2355 }
2356
2357 /* Not supported on pre-P2P firmware */
2358 if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
2359 BIT(NL80211_IFTYPE_P2P_CLIENT))) {
2360 ret = -EOPNOTSUPP;
2361 goto free;
2362 }
2363
2364 mutex_lock(&priv->mutex);
2365
2366 if (!priv->contexts[IWL_RXON_CTX_PAN].is_active) {
2367 /*
2368 * If the PAN context is free, use the normal
2369 * way of doing remain-on-channel offload + TX.
2370 */
2371 ret = 1;
2372 goto out;
2373 }
2374
2375 /* TODO: queue up if scanning? */
2376 if (test_bit(STATUS_SCANNING, &priv->status) ||
2377 priv->_agn.offchan_tx_skb) {
2378 ret = -EBUSY;
2379 goto out;
2380 }
2381
2382 /*
2383 * max_scan_ie_len doesn't include the blank SSID or the header,
2384 * so need to add that again here.
2385 */
2386 if (skb->len > hw->wiphy->max_scan_ie_len + 24 + 2) {
2387 ret = -ENOBUFS;
2388 goto out;
2389 }
2390
2391 priv->_agn.offchan_tx_skb = skb;
2392 priv->_agn.offchan_tx_timeout = wait;
2393 priv->_agn.offchan_tx_chan = chan;
2394
2395 ret = iwl_scan_initiate(priv, priv->contexts[IWL_RXON_CTX_PAN].vif,
2396 IWL_SCAN_OFFCH_TX, chan->band);
2397 if (ret)
2398 priv->_agn.offchan_tx_skb = NULL;
2399 out:
2400 mutex_unlock(&priv->mutex);
2401 free:
2402 if (ret < 0)
2403 kfree_skb(skb);
2404
2405 return ret;
2406 }
2407
2408 static int iwl_mac_offchannel_tx_cancel_wait(struct ieee80211_hw *hw)
2409 {
2410 struct iwl_priv *priv = hw->priv;
2411 int ret;
2412
2413 mutex_lock(&priv->mutex);
2414
2415 if (!priv->_agn.offchan_tx_skb) {
2416 ret = -EINVAL;
2417 goto unlock;
2418 }
2419
2420 priv->_agn.offchan_tx_skb = NULL;
2421
2422 ret = iwl_scan_cancel_timeout(priv, 200);
2423 if (ret)
2424 ret = -EIO;
2425 unlock:
2426 mutex_unlock(&priv->mutex);
2427
2428 return ret;
2429 }
2430
2431 /*****************************************************************************
2432 *
2433 * mac80211 entry point functions
2434 *
2435 *****************************************************************************/
2436
2437 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
2438 {
2439 .max = 1,
2440 .types = BIT(NL80211_IFTYPE_STATION),
2441 },
2442 {
2443 .max = 1,
2444 .types = BIT(NL80211_IFTYPE_AP),
2445 },
2446 };
2447
2448 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
2449 {
2450 .max = 2,
2451 .types = BIT(NL80211_IFTYPE_STATION),
2452 },
2453 };
2454
2455 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
2456 {
2457 .max = 1,
2458 .types = BIT(NL80211_IFTYPE_STATION),
2459 },
2460 {
2461 .max = 1,
2462 .types = BIT(NL80211_IFTYPE_P2P_GO) |
2463 BIT(NL80211_IFTYPE_AP),
2464 },
2465 };
2466
2467 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
2468 {
2469 .max = 2,
2470 .types = BIT(NL80211_IFTYPE_STATION),
2471 },
2472 {
2473 .max = 1,
2474 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
2475 },
2476 };
2477
2478 static const struct ieee80211_iface_combination
2479 iwlagn_iface_combinations_dualmode[] = {
2480 { .num_different_channels = 1,
2481 .max_interfaces = 2,
2482 .beacon_int_infra_match = true,
2483 .limits = iwlagn_sta_ap_limits,
2484 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
2485 },
2486 { .num_different_channels = 1,
2487 .max_interfaces = 2,
2488 .limits = iwlagn_2sta_limits,
2489 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
2490 },
2491 };
2492
2493 static const struct ieee80211_iface_combination
2494 iwlagn_iface_combinations_p2p[] = {
2495 { .num_different_channels = 1,
2496 .max_interfaces = 2,
2497 .beacon_int_infra_match = true,
2498 .limits = iwlagn_p2p_sta_go_limits,
2499 .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
2500 },
2501 { .num_different_channels = 1,
2502 .max_interfaces = 2,
2503 .limits = iwlagn_p2p_2sta_limits,
2504 .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
2505 },
2506 };
2507
2508 /*
2509 * Not a mac80211 entry point function, but it fits in with all the
2510 * other mac80211 functions grouped here.
2511 */
2512 static int iwl_mac_setup_register(struct iwl_priv *priv,
2513 struct iwlagn_ucode_capabilities *capa)
2514 {
2515 int ret;
2516 struct ieee80211_hw *hw = priv->hw;
2517 struct iwl_rxon_context *ctx;
2518
2519 hw->rate_control_algorithm = "iwl-agn-rs";
2520
2521 /* Tell mac80211 our characteristics */
2522 hw->flags = IEEE80211_HW_SIGNAL_DBM |
2523 IEEE80211_HW_AMPDU_AGGREGATION |
2524 IEEE80211_HW_NEED_DTIM_PERIOD |
2525 IEEE80211_HW_SPECTRUM_MGMT |
2526 IEEE80211_HW_REPORTS_TX_ACK_STATUS;
2527
2528 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2529
2530 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2531 IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2532
2533 if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
2534 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
2535 IEEE80211_HW_SUPPORTS_STATIC_SMPS;
2536
2537 if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
2538 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
2539
2540 hw->sta_data_size = sizeof(struct iwl_station_priv);
2541 hw->vif_data_size = sizeof(struct iwl_vif_priv);
2542
2543 for_each_context(priv, ctx) {
2544 hw->wiphy->interface_modes |= ctx->interface_modes;
2545 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
2546 }
2547
2548 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
2549
2550 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
2551 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
2552 hw->wiphy->n_iface_combinations =
2553 ARRAY_SIZE(iwlagn_iface_combinations_p2p);
2554 } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
2555 hw->wiphy->iface_combinations = iwlagn_iface_combinations_dualmode;
2556 hw->wiphy->n_iface_combinations =
2557 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
2558 }
2559
2560 hw->wiphy->max_remain_on_channel_duration = 1000;
2561
2562 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
2563 WIPHY_FLAG_DISABLE_BEACON_HINTS |
2564 WIPHY_FLAG_IBSS_RSN;
2565
2566 if (iwlagn_mod_params.power_save)
2567 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
2568 else
2569 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2570
2571 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
2572 /* we create the 802.11 header and a zero-length SSID element */
2573 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
2574
2575 /* Default value; 4 EDCA QOS priorities */
2576 hw->queues = 4;
2577
2578 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2579
2580 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2581 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2582 &priv->bands[IEEE80211_BAND_2GHZ];
2583 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2584 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2585 &priv->bands[IEEE80211_BAND_5GHZ];
2586
2587 iwl_leds_init(priv);
2588
2589 ret = ieee80211_register_hw(priv->hw);
2590 if (ret) {
2591 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2592 return ret;
2593 }
2594 priv->mac80211_registered = 1;
2595
2596 return 0;
2597 }
2598
2599
2600 static int iwlagn_mac_start(struct ieee80211_hw *hw)
2601 {
2602 struct iwl_priv *priv = hw->priv;
2603 int ret;
2604
2605 IWL_DEBUG_MAC80211(priv, "enter\n");
2606
2607 /* we should be verifying the device is ready to be opened */
2608 mutex_lock(&priv->mutex);
2609 ret = __iwl_up(priv);
2610 mutex_unlock(&priv->mutex);
2611 if (ret)
2612 return ret;
2613
2614 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2615
2616 /* Now we should be done, and the READY bit should be set. */
2617 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
2618 ret = -EIO;
2619
2620 iwlagn_led_enable(priv);
2621
2622 priv->is_open = 1;
2623 IWL_DEBUG_MAC80211(priv, "leave\n");
2624 return 0;
2625 }
2626
2627 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
2628 {
2629 struct iwl_priv *priv = hw->priv;
2630
2631 IWL_DEBUG_MAC80211(priv, "enter\n");
2632
2633 if (!priv->is_open)
2634 return;
2635
2636 priv->is_open = 0;
2637
2638 iwl_down(priv);
2639
2640 flush_workqueue(priv->workqueue);
2641
2642 /* User space software may expect getting rfkill changes
2643 * even if interface is down */
2644 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2645 iwl_enable_rfkill_int(priv);
2646
2647 IWL_DEBUG_MAC80211(priv, "leave\n");
2648 }
2649
2650 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2651 {
2652 struct iwl_priv *priv = hw->priv;
2653
2654 IWL_DEBUG_MACDUMP(priv, "enter\n");
2655
2656 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2657 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2658
2659 if (iwlagn_tx_skb(priv, skb))
2660 dev_kfree_skb_any(skb);
2661
2662 IWL_DEBUG_MACDUMP(priv, "leave\n");
2663 }
2664
2665 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
2666 struct ieee80211_vif *vif,
2667 struct ieee80211_key_conf *keyconf,
2668 struct ieee80211_sta *sta,
2669 u32 iv32, u16 *phase1key)
2670 {
2671 struct iwl_priv *priv = hw->priv;
2672 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2673
2674 IWL_DEBUG_MAC80211(priv, "enter\n");
2675
2676 iwl_update_tkip_key(priv, vif_priv->ctx, keyconf, sta,
2677 iv32, phase1key);
2678
2679 IWL_DEBUG_MAC80211(priv, "leave\n");
2680 }
2681
2682 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2683 struct ieee80211_vif *vif,
2684 struct ieee80211_sta *sta,
2685 struct ieee80211_key_conf *key)
2686 {
2687 struct iwl_priv *priv = hw->priv;
2688 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2689 struct iwl_rxon_context *ctx = vif_priv->ctx;
2690 int ret;
2691 u8 sta_id;
2692 bool is_default_wep_key = false;
2693
2694 IWL_DEBUG_MAC80211(priv, "enter\n");
2695
2696 if (iwlagn_mod_params.sw_crypto) {
2697 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2698 return -EOPNOTSUPP;
2699 }
2700
2701 /*
2702 * To support IBSS RSN, don't program group keys in IBSS, the
2703 * hardware will then not attempt to decrypt the frames.
2704 */
2705 if (vif->type == NL80211_IFTYPE_ADHOC &&
2706 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
2707 return -EOPNOTSUPP;
2708
2709 sta_id = iwl_sta_id_or_broadcast(priv, vif_priv->ctx, sta);
2710 if (sta_id == IWL_INVALID_STATION)
2711 return -EINVAL;
2712
2713 mutex_lock(&priv->mutex);
2714 iwl_scan_cancel_timeout(priv, 100);
2715
2716 /*
2717 * If we are getting WEP group key and we didn't receive any key mapping
2718 * so far, we are in legacy wep mode (group key only), otherwise we are
2719 * in 1X mode.
2720 * In legacy wep mode, we use another host command to the uCode.
2721 */
2722 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2723 key->cipher == WLAN_CIPHER_SUITE_WEP104) &&
2724 !sta) {
2725 if (cmd == SET_KEY)
2726 is_default_wep_key = !ctx->key_mapping_keys;
2727 else
2728 is_default_wep_key =
2729 (key->hw_key_idx == HW_KEY_DEFAULT);
2730 }
2731
2732 switch (cmd) {
2733 case SET_KEY:
2734 if (is_default_wep_key)
2735 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
2736 else
2737 ret = iwl_set_dynamic_key(priv, vif_priv->ctx,
2738 key, sta_id);
2739
2740 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2741 break;
2742 case DISABLE_KEY:
2743 if (is_default_wep_key)
2744 ret = iwl_remove_default_wep_key(priv, ctx, key);
2745 else
2746 ret = iwl_remove_dynamic_key(priv, ctx, key, sta_id);
2747
2748 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2749 break;
2750 default:
2751 ret = -EINVAL;
2752 }
2753
2754 mutex_unlock(&priv->mutex);
2755 IWL_DEBUG_MAC80211(priv, "leave\n");
2756
2757 return ret;
2758 }
2759
2760 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
2761 struct ieee80211_vif *vif,
2762 enum ieee80211_ampdu_mlme_action action,
2763 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
2764 u8 buf_size)
2765 {
2766 struct iwl_priv *priv = hw->priv;
2767 int ret = -EINVAL;
2768 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
2769
2770 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2771 sta->addr, tid);
2772
2773 if (!(priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE))
2774 return -EACCES;
2775
2776 mutex_lock(&priv->mutex);
2777
2778 switch (action) {
2779 case IEEE80211_AMPDU_RX_START:
2780 IWL_DEBUG_HT(priv, "start Rx\n");
2781 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
2782 break;
2783 case IEEE80211_AMPDU_RX_STOP:
2784 IWL_DEBUG_HT(priv, "stop Rx\n");
2785 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
2786 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2787 ret = 0;
2788 break;
2789 case IEEE80211_AMPDU_TX_START:
2790 IWL_DEBUG_HT(priv, "start Tx\n");
2791 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
2792 if (ret == 0) {
2793 priv->_agn.agg_tids_count++;
2794 IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2795 priv->_agn.agg_tids_count);
2796 }
2797 break;
2798 case IEEE80211_AMPDU_TX_STOP:
2799 IWL_DEBUG_HT(priv, "stop Tx\n");
2800 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
2801 if ((ret == 0) && (priv->_agn.agg_tids_count > 0)) {
2802 priv->_agn.agg_tids_count--;
2803 IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2804 priv->_agn.agg_tids_count);
2805 }
2806 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2807 ret = 0;
2808 if (priv->cfg->ht_params &&
2809 priv->cfg->ht_params->use_rts_for_aggregation) {
2810 /*
2811 * switch off RTS/CTS if it was previously enabled
2812 */
2813 sta_priv->lq_sta.lq.general_params.flags &=
2814 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2815 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2816 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2817 }
2818 break;
2819 case IEEE80211_AMPDU_TX_OPERATIONAL:
2820 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2821
2822 iwlagn_txq_agg_queue_setup(priv, sta, tid, buf_size);
2823
2824 /*
2825 * If the limit is 0, then it wasn't initialised yet,
2826 * use the default. We can do that since we take the
2827 * minimum below, and we don't want to go above our
2828 * default due to hardware restrictions.
2829 */
2830 if (sta_priv->max_agg_bufsize == 0)
2831 sta_priv->max_agg_bufsize =
2832 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2833
2834 /*
2835 * Even though in theory the peer could have different
2836 * aggregation reorder buffer sizes for different sessions,
2837 * our ucode doesn't allow for that and has a global limit
2838 * for each station. Therefore, use the minimum of all the
2839 * aggregation sessions and our default value.
2840 */
2841 sta_priv->max_agg_bufsize =
2842 min(sta_priv->max_agg_bufsize, buf_size);
2843
2844 if (priv->cfg->ht_params &&
2845 priv->cfg->ht_params->use_rts_for_aggregation) {
2846 /*
2847 * switch to RTS/CTS if it is the prefer protection
2848 * method for HT traffic
2849 */
2850
2851 sta_priv->lq_sta.lq.general_params.flags |=
2852 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2853 }
2854
2855 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
2856 sta_priv->max_agg_bufsize;
2857
2858 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2859 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2860
2861 IWL_INFO(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
2862 sta->addr, tid);
2863 ret = 0;
2864 break;
2865 }
2866 mutex_unlock(&priv->mutex);
2867
2868 return ret;
2869 }
2870
2871 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
2872 struct ieee80211_vif *vif,
2873 struct ieee80211_sta *sta)
2874 {
2875 struct iwl_priv *priv = hw->priv;
2876 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2877 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2878 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
2879 int ret;
2880 u8 sta_id;
2881
2882 IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
2883 sta->addr);
2884 mutex_lock(&priv->mutex);
2885 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
2886 sta->addr);
2887 sta_priv->common.sta_id = IWL_INVALID_STATION;
2888
2889 atomic_set(&sta_priv->pending_frames, 0);
2890 if (vif->type == NL80211_IFTYPE_AP)
2891 sta_priv->client = true;
2892
2893 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
2894 is_ap, sta, &sta_id);
2895 if (ret) {
2896 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
2897 sta->addr, ret);
2898 /* Should we return success if return code is EEXIST ? */
2899 mutex_unlock(&priv->mutex);
2900 return ret;
2901 }
2902
2903 sta_priv->common.sta_id = sta_id;
2904
2905 /* Initialize rate scaling */
2906 IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
2907 sta->addr);
2908 iwl_rs_rate_init(priv, sta, sta_id);
2909 mutex_unlock(&priv->mutex);
2910
2911 return 0;
2912 }
2913
2914 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
2915 struct ieee80211_channel_switch *ch_switch)
2916 {
2917 struct iwl_priv *priv = hw->priv;
2918 const struct iwl_channel_info *ch_info;
2919 struct ieee80211_conf *conf = &hw->conf;
2920 struct ieee80211_channel *channel = ch_switch->channel;
2921 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2922 /*
2923 * MULTI-FIXME
2924 * When we add support for multiple interfaces, we need to
2925 * revisit this. The channel switch command in the device
2926 * only affects the BSS context, but what does that really
2927 * mean? And what if we get a CSA on the second interface?
2928 * This needs a lot of work.
2929 */
2930 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2931 u16 ch;
2932
2933 IWL_DEBUG_MAC80211(priv, "enter\n");
2934
2935 mutex_lock(&priv->mutex);
2936
2937 if (iwl_is_rfkill(priv))
2938 goto out;
2939
2940 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2941 test_bit(STATUS_SCANNING, &priv->status) ||
2942 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
2943 goto out;
2944
2945 if (!iwl_is_associated_ctx(ctx))
2946 goto out;
2947
2948 if (!priv->cfg->ops->lib->set_channel_switch)
2949 goto out;
2950
2951 ch = channel->hw_value;
2952 if (le16_to_cpu(ctx->active.channel) == ch)
2953 goto out;
2954
2955 ch_info = iwl_get_channel_info(priv, channel->band, ch);
2956 if (!is_channel_valid(ch_info)) {
2957 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
2958 goto out;
2959 }
2960
2961 spin_lock_irq(&priv->lock);
2962
2963 priv->current_ht_config.smps = conf->smps_mode;
2964
2965 /* Configure HT40 channels */
2966 ctx->ht.enabled = conf_is_ht(conf);
2967 if (ctx->ht.enabled) {
2968 if (conf_is_ht40_minus(conf)) {
2969 ctx->ht.extension_chan_offset =
2970 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2971 ctx->ht.is_40mhz = true;
2972 } else if (conf_is_ht40_plus(conf)) {
2973 ctx->ht.extension_chan_offset =
2974 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2975 ctx->ht.is_40mhz = true;
2976 } else {
2977 ctx->ht.extension_chan_offset =
2978 IEEE80211_HT_PARAM_CHA_SEC_NONE;
2979 ctx->ht.is_40mhz = false;
2980 }
2981 } else
2982 ctx->ht.is_40mhz = false;
2983
2984 if ((le16_to_cpu(ctx->staging.channel) != ch))
2985 ctx->staging.flags = 0;
2986
2987 iwl_set_rxon_channel(priv, channel, ctx);
2988 iwl_set_rxon_ht(priv, ht_conf);
2989 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
2990
2991 spin_unlock_irq(&priv->lock);
2992
2993 iwl_set_rate(priv);
2994 /*
2995 * at this point, staging_rxon has the
2996 * configuration for channel switch
2997 */
2998 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
2999 priv->switch_channel = cpu_to_le16(ch);
3000 if (priv->cfg->ops->lib->set_channel_switch(priv, ch_switch)) {
3001 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
3002 priv->switch_channel = 0;
3003 ieee80211_chswitch_done(ctx->vif, false);
3004 }
3005
3006 out:
3007 mutex_unlock(&priv->mutex);
3008 IWL_DEBUG_MAC80211(priv, "leave\n");
3009 }
3010
3011 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
3012 unsigned int changed_flags,
3013 unsigned int *total_flags,
3014 u64 multicast)
3015 {
3016 struct iwl_priv *priv = hw->priv;
3017 __le32 filter_or = 0, filter_nand = 0;
3018 struct iwl_rxon_context *ctx;
3019
3020 #define CHK(test, flag) do { \
3021 if (*total_flags & (test)) \
3022 filter_or |= (flag); \
3023 else \
3024 filter_nand |= (flag); \
3025 } while (0)
3026
3027 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
3028 changed_flags, *total_flags);
3029
3030 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
3031 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
3032 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
3033 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3034
3035 #undef CHK
3036
3037 mutex_lock(&priv->mutex);
3038
3039 for_each_context(priv, ctx) {
3040 ctx->staging.filter_flags &= ~filter_nand;
3041 ctx->staging.filter_flags |= filter_or;
3042
3043 /*
3044 * Not committing directly because hardware can perform a scan,
3045 * but we'll eventually commit the filter flags change anyway.
3046 */
3047 }
3048
3049 mutex_unlock(&priv->mutex);
3050
3051 /*
3052 * Receiving all multicast frames is always enabled by the
3053 * default flags setup in iwl_connection_init_rx_config()
3054 * since we currently do not support programming multicast
3055 * filters into the device.
3056 */
3057 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
3058 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3059 }
3060
3061 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
3062 {
3063 struct iwl_priv *priv = hw->priv;
3064
3065 mutex_lock(&priv->mutex);
3066 IWL_DEBUG_MAC80211(priv, "enter\n");
3067
3068 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3069 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
3070 goto done;
3071 }
3072 if (iwl_is_rfkill(priv)) {
3073 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
3074 goto done;
3075 }
3076
3077 /*
3078 * mac80211 will not push any more frames for transmit
3079 * until the flush is completed
3080 */
3081 if (drop) {
3082 IWL_DEBUG_MAC80211(priv, "send flush command\n");
3083 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
3084 IWL_ERR(priv, "flush request fail\n");
3085 goto done;
3086 }
3087 }
3088 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
3089 iwlagn_wait_tx_queue_empty(priv);
3090 done:
3091 mutex_unlock(&priv->mutex);
3092 IWL_DEBUG_MAC80211(priv, "leave\n");
3093 }
3094
3095 static void iwlagn_disable_roc(struct iwl_priv *priv)
3096 {
3097 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
3098 struct ieee80211_channel *chan = ACCESS_ONCE(priv->hw->conf.channel);
3099
3100 lockdep_assert_held(&priv->mutex);
3101
3102 if (!ctx->is_active)
3103 return;
3104
3105 ctx->staging.dev_type = RXON_DEV_TYPE_2STA;
3106 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3107 iwl_set_rxon_channel(priv, chan, ctx);
3108 iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
3109
3110 priv->_agn.hw_roc_channel = NULL;
3111
3112 iwlagn_commit_rxon(priv, ctx);
3113
3114 ctx->is_active = false;
3115 }
3116
3117 static void iwlagn_bg_roc_done(struct work_struct *work)
3118 {
3119 struct iwl_priv *priv = container_of(work, struct iwl_priv,
3120 _agn.hw_roc_work.work);
3121
3122 mutex_lock(&priv->mutex);
3123 ieee80211_remain_on_channel_expired(priv->hw);
3124 iwlagn_disable_roc(priv);
3125 mutex_unlock(&priv->mutex);
3126 }
3127
3128 static int iwl_mac_remain_on_channel(struct ieee80211_hw *hw,
3129 struct ieee80211_channel *channel,
3130 enum nl80211_channel_type channel_type,
3131 int duration)
3132 {
3133 struct iwl_priv *priv = hw->priv;
3134 int err = 0;
3135
3136 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
3137 return -EOPNOTSUPP;
3138
3139 if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
3140 BIT(NL80211_IFTYPE_P2P_CLIENT)))
3141 return -EOPNOTSUPP;
3142
3143 mutex_lock(&priv->mutex);
3144
3145 if (priv->contexts[IWL_RXON_CTX_PAN].is_active ||
3146 test_bit(STATUS_SCAN_HW, &priv->status)) {
3147 err = -EBUSY;
3148 goto out;
3149 }
3150
3151 priv->contexts[IWL_RXON_CTX_PAN].is_active = true;
3152 priv->_agn.hw_roc_channel = channel;
3153 priv->_agn.hw_roc_chantype = channel_type;
3154 priv->_agn.hw_roc_duration = DIV_ROUND_UP(duration * 1000, 1024);
3155 iwlagn_commit_rxon(priv, &priv->contexts[IWL_RXON_CTX_PAN]);
3156 queue_delayed_work(priv->workqueue, &priv->_agn.hw_roc_work,
3157 msecs_to_jiffies(duration + 20));
3158
3159 msleep(IWL_MIN_SLOT_TIME); /* TU is almost ms */
3160 ieee80211_ready_on_channel(priv->hw);
3161
3162 out:
3163 mutex_unlock(&priv->mutex);
3164
3165 return err;
3166 }
3167
3168 static int iwl_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
3169 {
3170 struct iwl_priv *priv = hw->priv;
3171
3172 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
3173 return -EOPNOTSUPP;
3174
3175 cancel_delayed_work_sync(&priv->_agn.hw_roc_work);
3176
3177 mutex_lock(&priv->mutex);
3178 iwlagn_disable_roc(priv);
3179 mutex_unlock(&priv->mutex);
3180
3181 return 0;
3182 }
3183
3184 /*****************************************************************************
3185 *
3186 * driver setup and teardown
3187 *
3188 *****************************************************************************/
3189
3190 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3191 {
3192 priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3193
3194 init_waitqueue_head(&priv->wait_command_queue);
3195
3196 INIT_WORK(&priv->restart, iwl_bg_restart);
3197 INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3198 INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3199 INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3200 INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
3201 INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
3202 INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
3203 INIT_DELAYED_WORK(&priv->_agn.hw_roc_work, iwlagn_bg_roc_done);
3204
3205 iwl_setup_scan_deferred_work(priv);
3206
3207 if (priv->cfg->ops->lib->setup_deferred_work)
3208 priv->cfg->ops->lib->setup_deferred_work(priv);
3209
3210 init_timer(&priv->statistics_periodic);
3211 priv->statistics_periodic.data = (unsigned long)priv;
3212 priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3213
3214 init_timer(&priv->ucode_trace);
3215 priv->ucode_trace.data = (unsigned long)priv;
3216 priv->ucode_trace.function = iwl_bg_ucode_trace;
3217
3218 init_timer(&priv->watchdog);
3219 priv->watchdog.data = (unsigned long)priv;
3220 priv->watchdog.function = iwl_bg_watchdog;
3221
3222 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3223 iwl_irq_tasklet, (unsigned long)priv);
3224 }
3225
3226 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3227 {
3228 if (priv->cfg->ops->lib->cancel_deferred_work)
3229 priv->cfg->ops->lib->cancel_deferred_work(priv);
3230
3231 cancel_work_sync(&priv->run_time_calib_work);
3232 cancel_work_sync(&priv->beacon_update);
3233
3234 iwl_cancel_scan_deferred_work(priv);
3235
3236 cancel_work_sync(&priv->bt_full_concurrency);
3237 cancel_work_sync(&priv->bt_runtime_config);
3238
3239 del_timer_sync(&priv->statistics_periodic);
3240 del_timer_sync(&priv->ucode_trace);
3241 }
3242
3243 static void iwl_init_hw_rates(struct iwl_priv *priv,
3244 struct ieee80211_rate *rates)
3245 {
3246 int i;
3247
3248 for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
3249 rates[i].bitrate = iwl_rates[i].ieee * 5;
3250 rates[i].hw_value = i; /* Rate scaling will work on indexes */
3251 rates[i].hw_value_short = i;
3252 rates[i].flags = 0;
3253 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
3254 /*
3255 * If CCK != 1M then set short preamble rate flag.
3256 */
3257 rates[i].flags |=
3258 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
3259 0 : IEEE80211_RATE_SHORT_PREAMBLE;
3260 }
3261 }
3262 }
3263
3264 static int iwl_init_drv(struct iwl_priv *priv)
3265 {
3266 int ret;
3267
3268 spin_lock_init(&priv->sta_lock);
3269 spin_lock_init(&priv->hcmd_lock);
3270
3271 mutex_init(&priv->mutex);
3272
3273 priv->ieee_channels = NULL;
3274 priv->ieee_rates = NULL;
3275 priv->band = IEEE80211_BAND_2GHZ;
3276
3277 priv->iw_mode = NL80211_IFTYPE_STATION;
3278 priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
3279 priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3280 priv->_agn.agg_tids_count = 0;
3281
3282 /* initialize force reset */
3283 priv->force_reset[IWL_RF_RESET].reset_duration =
3284 IWL_DELAY_NEXT_FORCE_RF_RESET;
3285 priv->force_reset[IWL_FW_RESET].reset_duration =
3286 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
3287
3288 priv->rx_statistics_jiffies = jiffies;
3289
3290 /* Choose which receivers/antennas to use */
3291 if (priv->cfg->ops->hcmd->set_rxon_chain)
3292 priv->cfg->ops->hcmd->set_rxon_chain(priv,
3293 &priv->contexts[IWL_RXON_CTX_BSS]);
3294
3295 iwl_init_scan_params(priv);
3296
3297 /* init bt coex */
3298 if (priv->cfg->bt_params &&
3299 priv->cfg->bt_params->advanced_bt_coexist) {
3300 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
3301 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
3302 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
3303 priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
3304 priv->bt_duration = BT_DURATION_LIMIT_DEF;
3305 priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
3306 }
3307
3308 ret = iwl_init_channel_map(priv);
3309 if (ret) {
3310 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3311 goto err;
3312 }
3313
3314 ret = iwlcore_init_geos(priv);
3315 if (ret) {
3316 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3317 goto err_free_channel_map;
3318 }
3319 iwl_init_hw_rates(priv, priv->ieee_rates);
3320
3321 return 0;
3322
3323 err_free_channel_map:
3324 iwl_free_channel_map(priv);
3325 err:
3326 return ret;
3327 }
3328
3329 static void iwl_uninit_drv(struct iwl_priv *priv)
3330 {
3331 iwl_calib_free_results(priv);
3332 iwlcore_free_geos(priv);
3333 iwl_free_channel_map(priv);
3334 kfree(priv->scan_cmd);
3335 kfree(priv->beacon_cmd);
3336 }
3337
3338 struct ieee80211_ops iwlagn_hw_ops = {
3339 .tx = iwlagn_mac_tx,
3340 .start = iwlagn_mac_start,
3341 .stop = iwlagn_mac_stop,
3342 .add_interface = iwl_mac_add_interface,
3343 .remove_interface = iwl_mac_remove_interface,
3344 .change_interface = iwl_mac_change_interface,
3345 .config = iwlagn_mac_config,
3346 .configure_filter = iwlagn_configure_filter,
3347 .set_key = iwlagn_mac_set_key,
3348 .update_tkip_key = iwlagn_mac_update_tkip_key,
3349 .conf_tx = iwl_mac_conf_tx,
3350 .bss_info_changed = iwlagn_bss_info_changed,
3351 .ampdu_action = iwlagn_mac_ampdu_action,
3352 .hw_scan = iwl_mac_hw_scan,
3353 .sta_notify = iwlagn_mac_sta_notify,
3354 .sta_add = iwlagn_mac_sta_add,
3355 .sta_remove = iwl_mac_sta_remove,
3356 .channel_switch = iwlagn_mac_channel_switch,
3357 .flush = iwlagn_mac_flush,
3358 .tx_last_beacon = iwl_mac_tx_last_beacon,
3359 .remain_on_channel = iwl_mac_remain_on_channel,
3360 .cancel_remain_on_channel = iwl_mac_cancel_remain_on_channel,
3361 .offchannel_tx = iwl_mac_offchannel_tx,
3362 .offchannel_tx_cancel_wait = iwl_mac_offchannel_tx_cancel_wait,
3363 CFG80211_TESTMODE_CMD(iwl_testmode_cmd)
3364 CFG80211_TESTMODE_DUMP(iwl_testmode_dump)
3365 };
3366
3367 static u32 iwl_hw_detect(struct iwl_priv *priv)
3368 {
3369 return iwl_read32(priv, CSR_HW_REV);
3370 }
3371
3372 static int iwl_set_hw_params(struct iwl_priv *priv)
3373 {
3374 priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
3375 priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
3376 if (iwlagn_mod_params.amsdu_size_8K)
3377 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
3378 else
3379 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
3380
3381 priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
3382
3383 if (iwlagn_mod_params.disable_11n)
3384 priv->cfg->sku &= ~EEPROM_SKU_CAP_11N_ENABLE;
3385
3386 /* Device-specific setup */
3387 return priv->cfg->ops->lib->set_hw_params(priv);
3388 }
3389
3390 static const u8 iwlagn_bss_ac_to_fifo[] = {
3391 IWL_TX_FIFO_VO,
3392 IWL_TX_FIFO_VI,
3393 IWL_TX_FIFO_BE,
3394 IWL_TX_FIFO_BK,
3395 };
3396
3397 static const u8 iwlagn_bss_ac_to_queue[] = {
3398 0, 1, 2, 3,
3399 };
3400
3401 static const u8 iwlagn_pan_ac_to_fifo[] = {
3402 IWL_TX_FIFO_VO_IPAN,
3403 IWL_TX_FIFO_VI_IPAN,
3404 IWL_TX_FIFO_BE_IPAN,
3405 IWL_TX_FIFO_BK_IPAN,
3406 };
3407
3408 static const u8 iwlagn_pan_ac_to_queue[] = {
3409 7, 6, 5, 4,
3410 };
3411
3412 /* This function both allocates and initializes hw and priv. */
3413 static struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg)
3414 {
3415 struct iwl_priv *priv;
3416 /* mac80211 allocates memory for this device instance, including
3417 * space for this driver's private structure */
3418 struct ieee80211_hw *hw;
3419
3420 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwlagn_hw_ops);
3421 if (hw == NULL) {
3422 pr_err("%s: Can not allocate network device\n",
3423 cfg->name);
3424 goto out;
3425 }
3426
3427 priv = hw->priv;
3428 priv->hw = hw;
3429
3430 out:
3431 return hw;
3432 }
3433
3434 static void iwl_init_context(struct iwl_priv *priv)
3435 {
3436 int i;
3437
3438 /*
3439 * The default context is always valid,
3440 * more may be discovered when firmware
3441 * is loaded.
3442 */
3443 priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
3444
3445 for (i = 0; i < NUM_IWL_RXON_CTX; i++)
3446 priv->contexts[i].ctxid = i;
3447
3448 priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
3449 priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
3450 priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
3451 priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
3452 priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
3453 priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
3454 priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
3455 priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
3456 priv->contexts[IWL_RXON_CTX_BSS].ac_to_fifo = iwlagn_bss_ac_to_fifo;
3457 priv->contexts[IWL_RXON_CTX_BSS].ac_to_queue = iwlagn_bss_ac_to_queue;
3458 priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
3459 BIT(NL80211_IFTYPE_ADHOC);
3460 priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
3461 BIT(NL80211_IFTYPE_STATION);
3462 priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
3463 priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
3464 priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
3465 priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
3466
3467 priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
3468 priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
3469 REPLY_WIPAN_RXON_TIMING;
3470 priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
3471 REPLY_WIPAN_RXON_ASSOC;
3472 priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
3473 priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
3474 priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
3475 priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
3476 priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
3477 priv->contexts[IWL_RXON_CTX_PAN].ac_to_fifo = iwlagn_pan_ac_to_fifo;
3478 priv->contexts[IWL_RXON_CTX_PAN].ac_to_queue = iwlagn_pan_ac_to_queue;
3479 priv->contexts[IWL_RXON_CTX_PAN].mcast_queue = IWL_IPAN_MCAST_QUEUE;
3480 priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
3481 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
3482 #ifdef CONFIG_IWL_P2P
3483 priv->contexts[IWL_RXON_CTX_PAN].interface_modes |=
3484 BIT(NL80211_IFTYPE_P2P_CLIENT) | BIT(NL80211_IFTYPE_P2P_GO);
3485 #endif
3486 priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
3487 priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
3488 priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
3489
3490 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
3491 }
3492
3493 int iwl_probe(void *bus_specific, struct iwl_bus_ops *bus_ops,
3494 struct iwl_cfg *cfg)
3495 {
3496 int err = 0;
3497 struct iwl_priv *priv;
3498 struct ieee80211_hw *hw;
3499 u16 num_mac;
3500 u32 hw_rev;
3501
3502 /************************
3503 * 1. Allocating HW data
3504 ************************/
3505 hw = iwl_alloc_all(cfg);
3506 if (!hw) {
3507 err = -ENOMEM;
3508 goto out;
3509 }
3510
3511 priv = hw->priv;
3512
3513 priv->bus.priv = priv;
3514 priv->bus.bus_specific = bus_specific;
3515 priv->bus.ops = bus_ops;
3516 priv->bus.irq = priv->bus.ops->get_irq(&priv->bus);
3517 priv->bus.ops->set_drv_data(&priv->bus, priv);
3518 priv->bus.dev = priv->bus.ops->get_dev(&priv->bus);
3519
3520 /* At this point both hw and priv are allocated. */
3521
3522 SET_IEEE80211_DEV(hw, priv->bus.dev);
3523
3524 IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3525 priv->cfg = cfg;
3526 priv->inta_mask = CSR_INI_SET_MASK;
3527
3528 /* is antenna coupling more than 35dB ? */
3529 priv->bt_ant_couple_ok =
3530 (iwlagn_ant_coupling > IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
3531 true : false;
3532
3533 /* enable/disable bt channel inhibition */
3534 priv->bt_ch_announce = iwlagn_bt_ch_announce;
3535 IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
3536 (priv->bt_ch_announce) ? "On" : "Off");
3537
3538 if (iwl_alloc_traffic_mem(priv))
3539 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3540
3541
3542 /* these spin locks will be used in apm_ops.init and EEPROM access
3543 * we should init now
3544 */
3545 spin_lock_init(&priv->reg_lock);
3546 spin_lock_init(&priv->lock);
3547
3548 /*
3549 * stop and reset the on-board processor just in case it is in a
3550 * strange state ... like being left stranded by a primary kernel
3551 * and this is now the kdump kernel trying to start up
3552 */
3553 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3554
3555 /***********************
3556 * 3. Read REV register
3557 ***********************/
3558 hw_rev = iwl_hw_detect(priv);
3559 IWL_INFO(priv, "Detected %s, REV=0x%X\n",
3560 priv->cfg->name, hw_rev);
3561
3562 if (iwl_prepare_card_hw(priv)) {
3563 err = -EIO;
3564 IWL_WARN(priv, "Failed, HW not ready\n");
3565 goto out_free_traffic_mem;
3566 }
3567
3568 /*****************
3569 * 4. Read EEPROM
3570 *****************/
3571 /* Read the EEPROM */
3572 err = iwl_eeprom_init(priv, hw_rev);
3573 if (err) {
3574 IWL_ERR(priv, "Unable to init EEPROM\n");
3575 goto out_free_traffic_mem;
3576 }
3577 err = iwl_eeprom_check_version(priv);
3578 if (err)
3579 goto out_free_eeprom;
3580
3581 err = iwl_eeprom_check_sku(priv);
3582 if (err)
3583 goto out_free_eeprom;
3584
3585 /* extract MAC Address */
3586 iwl_eeprom_get_mac(priv, priv->addresses[0].addr);
3587 IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
3588 priv->hw->wiphy->addresses = priv->addresses;
3589 priv->hw->wiphy->n_addresses = 1;
3590 num_mac = iwl_eeprom_query16(priv, EEPROM_NUM_MAC_ADDRESS);
3591 if (num_mac > 1) {
3592 memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
3593 ETH_ALEN);
3594 priv->addresses[1].addr[5]++;
3595 priv->hw->wiphy->n_addresses++;
3596 }
3597
3598 /* initialize all valid contexts */
3599 iwl_init_context(priv);
3600
3601 /************************
3602 * 5. Setup HW constants
3603 ************************/
3604 if (iwl_set_hw_params(priv)) {
3605 err = -ENOENT;
3606 IWL_ERR(priv, "failed to set hw parameters\n");
3607 goto out_free_eeprom;
3608 }
3609
3610 /*******************
3611 * 6. Setup priv
3612 *******************/
3613
3614 err = iwl_init_drv(priv);
3615 if (err)
3616 goto out_free_eeprom;
3617 /* At this point both hw and priv are initialized. */
3618
3619 /********************
3620 * 7. Setup services
3621 ********************/
3622 iwl_alloc_isr_ict(priv);
3623
3624 err = request_irq(priv->bus.irq, iwl_isr_ict, IRQF_SHARED,
3625 DRV_NAME, priv);
3626 if (err) {
3627 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->bus.irq);
3628 goto out_uninit_drv;
3629 }
3630
3631 iwl_setup_deferred_work(priv);
3632 iwl_setup_rx_handlers(priv);
3633 iwl_testmode_init(priv);
3634
3635 /*********************************************
3636 * 8. Enable interrupts
3637 *********************************************/
3638
3639 iwl_enable_rfkill_int(priv);
3640
3641 /* If platform's RF_KILL switch is NOT set to KILL */
3642 if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3643 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3644 else
3645 set_bit(STATUS_RF_KILL_HW, &priv->status);
3646
3647 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3648 test_bit(STATUS_RF_KILL_HW, &priv->status));
3649
3650 iwl_power_initialize(priv);
3651 iwl_tt_initialize(priv);
3652
3653 init_completion(&priv->_agn.firmware_loading_complete);
3654
3655 err = iwl_request_firmware(priv, true);
3656 if (err)
3657 goto out_destroy_workqueue;
3658
3659 return 0;
3660
3661 out_destroy_workqueue:
3662 destroy_workqueue(priv->workqueue);
3663 priv->workqueue = NULL;
3664 free_irq(priv->bus.irq, priv);
3665 iwl_free_isr_ict(priv);
3666 out_uninit_drv:
3667 iwl_uninit_drv(priv);
3668 out_free_eeprom:
3669 iwl_eeprom_free(priv);
3670 out_free_traffic_mem:
3671 iwl_free_traffic_mem(priv);
3672 ieee80211_free_hw(priv->hw);
3673 out:
3674 return err;
3675 }
3676
3677 void __devexit iwl_remove(struct iwl_priv * priv)
3678 {
3679 unsigned long flags;
3680
3681 wait_for_completion(&priv->_agn.firmware_loading_complete);
3682
3683 IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3684
3685 iwl_dbgfs_unregister(priv);
3686 sysfs_remove_group(&priv->bus.dev->kobj,
3687 &iwl_attribute_group);
3688
3689 /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3690 * to be called and iwl_down since we are removing the device
3691 * we need to set STATUS_EXIT_PENDING bit.
3692 */
3693 set_bit(STATUS_EXIT_PENDING, &priv->status);
3694
3695 iwl_testmode_cleanup(priv);
3696 iwl_leds_exit(priv);
3697
3698 if (priv->mac80211_registered) {
3699 ieee80211_unregister_hw(priv->hw);
3700 priv->mac80211_registered = 0;
3701 }
3702
3703 /* Reset to low power before unloading driver. */
3704 iwl_apm_stop(priv);
3705
3706 iwl_tt_exit(priv);
3707
3708 /* make sure we flush any pending irq or
3709 * tasklet for the driver
3710 */
3711 spin_lock_irqsave(&priv->lock, flags);
3712 iwl_disable_interrupts(priv);
3713 spin_unlock_irqrestore(&priv->lock, flags);
3714
3715 iwl_synchronize_irq(priv);
3716
3717 iwl_dealloc_ucode(priv);
3718
3719 if (priv->rxq.bd)
3720 iwlagn_rx_queue_free(priv, &priv->rxq);
3721 iwlagn_hw_txq_ctx_free(priv);
3722
3723 iwl_eeprom_free(priv);
3724
3725
3726 /*netif_stop_queue(dev); */
3727 flush_workqueue(priv->workqueue);
3728
3729 /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3730 * priv->workqueue... so we can't take down the workqueue
3731 * until now... */
3732 destroy_workqueue(priv->workqueue);
3733 priv->workqueue = NULL;
3734 iwl_free_traffic_mem(priv);
3735
3736 free_irq(priv->bus.irq, priv);
3737 priv->bus.ops->set_drv_data(&priv->bus, NULL);
3738
3739 iwl_uninit_drv(priv);
3740
3741 iwl_free_isr_ict(priv);
3742
3743 dev_kfree_skb(priv->beacon_skb);
3744
3745 ieee80211_free_hw(priv->hw);
3746 }
3747
3748
3749 /*****************************************************************************
3750 *
3751 * driver and module entry point
3752 *
3753 *****************************************************************************/
3754 static int __init iwl_init(void)
3755 {
3756
3757 int ret;
3758 pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3759 pr_info(DRV_COPYRIGHT "\n");
3760
3761 ret = iwlagn_rate_control_register();
3762 if (ret) {
3763 pr_err("Unable to register rate control algorithm: %d\n", ret);
3764 return ret;
3765 }
3766
3767 ret = iwl_pci_register_driver();
3768
3769 if (ret)
3770 goto error_register;
3771 return ret;
3772
3773 error_register:
3774 iwlagn_rate_control_unregister();
3775 return ret;
3776 }
3777
3778 static void __exit iwl_exit(void)
3779 {
3780 iwl_pci_unregister_driver();
3781 iwlagn_rate_control_unregister();
3782 }
3783
3784 module_exit(iwl_exit);
3785 module_init(iwl_init);
3786
3787 #ifdef CONFIG_IWLWIFI_DEBUG
3788 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3789 MODULE_PARM_DESC(debug, "debug output mask");
3790 #endif
3791
3792 module_param_named(swcrypto, iwlagn_mod_params.sw_crypto, int, S_IRUGO);
3793 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
3794 module_param_named(queues_num, iwlagn_mod_params.num_of_queues, int, S_IRUGO);
3795 MODULE_PARM_DESC(queues_num, "number of hw queues.");
3796 module_param_named(11n_disable, iwlagn_mod_params.disable_11n, int, S_IRUGO);
3797 MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
3798 module_param_named(amsdu_size_8K, iwlagn_mod_params.amsdu_size_8K,
3799 int, S_IRUGO);
3800 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
3801 module_param_named(fw_restart, iwlagn_mod_params.restart_fw, int, S_IRUGO);
3802 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
3803
3804 module_param_named(ucode_alternative, iwlagn_wanted_ucode_alternative, int,
3805 S_IRUGO);
3806 MODULE_PARM_DESC(ucode_alternative,
3807 "specify ucode alternative to use from ucode file");
3808
3809 module_param_named(antenna_coupling, iwlagn_ant_coupling, int, S_IRUGO);
3810 MODULE_PARM_DESC(antenna_coupling,
3811 "specify antenna coupling in dB (defualt: 0 dB)");
3812
3813 module_param_named(bt_ch_inhibition, iwlagn_bt_ch_announce, bool, S_IRUGO);
3814 MODULE_PARM_DESC(bt_ch_inhibition,
3815 "Disable BT channel inhibition (default: enable)");
3816
3817 module_param_named(plcp_check, iwlagn_mod_params.plcp_check, bool, S_IRUGO);
3818 MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");
3819
3820 module_param_named(ack_check, iwlagn_mod_params.ack_check, bool, S_IRUGO);
3821 MODULE_PARM_DESC(ack_check, "Check ack health (default: 0 [disabled])");
3822
3823 module_param_named(wd_disable, iwlagn_mod_params.wd_disable, bool, S_IRUGO);
3824 MODULE_PARM_DESC(wd_disable,
3825 "Disable stuck queue watchdog timer (default: 0 [enabled])");
3826
3827 /*
3828 * set bt_coex_active to true, uCode will do kill/defer
3829 * every time the priority line is asserted (BT is sending signals on the
3830 * priority line in the PCIx).
3831 * set bt_coex_active to false, uCode will ignore the BT activity and
3832 * perform the normal operation
3833 *
3834 * User might experience transmit issue on some platform due to WiFi/BT
3835 * co-exist problem. The possible behaviors are:
3836 * Able to scan and finding all the available AP
3837 * Not able to associate with any AP
3838 * On those platforms, WiFi communication can be restored by set
3839 * "bt_coex_active" module parameter to "false"
3840 *
3841 * default: bt_coex_active = true (BT_COEX_ENABLE)
3842 */
3843 module_param_named(bt_coex_active, iwlagn_mod_params.bt_coex_active,
3844 bool, S_IRUGO);
3845 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bt co-exist (default: enable)");
3846
3847 module_param_named(led_mode, iwlagn_mod_params.led_mode, int, S_IRUGO);
3848 MODULE_PARM_DESC(led_mode, "0=system default, "
3849 "1=On(RF On)/Off(RF Off), 2=blinking (default: 0)");
3850
3851 module_param_named(power_save, iwlagn_mod_params.power_save,
3852 bool, S_IRUGO);
3853 MODULE_PARM_DESC(power_save,
3854 "enable WiFi power management (default: disable)");
3855
3856 module_param_named(power_level, iwlagn_mod_params.power_level,
3857 int, S_IRUGO);
3858 MODULE_PARM_DESC(power_level,
3859 "default power save level (range from 1 - 5, default: 1)");
3860
3861 /*
3862 * For now, keep using power level 1 instead of automatically
3863 * adjusting ...
3864 */
3865 module_param_named(no_sleep_autoadjust, iwlagn_mod_params.no_sleep_autoadjust,
3866 bool, S_IRUGO);
3867 MODULE_PARM_DESC(no_sleep_autoadjust,
3868 "don't automatically adjust sleep level "
3869 "according to maximum network latency (default: true)");
Linux kernel - Deliverables
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