?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
iwlagn: add an API to free the TX context
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-agn.c
blob4d5b7cc33946320e08a51a48893616c8facc277f
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 #include "iwl-trans.h"
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 for_each_context(priv, ctx) {
94 iwlagn_set_rxon_chain(priv, ctx);
95 if (ctx->active.rx_chain != ctx->staging.rx_chain)
96 iwlagn_commit_rxon(priv, ctx);
97 }
98 }
99
100 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
101 static void iwl_set_beacon_tim(struct iwl_priv *priv,
102 struct iwl_tx_beacon_cmd *tx_beacon_cmd,
103 u8 *beacon, u32 frame_size)
104 {
105 u16 tim_idx;
106 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
107
108 /*
109 * The index is relative to frame start but we start looking at the
110 * variable-length part of the beacon.
111 */
112 tim_idx = mgmt->u.beacon.variable - beacon;
113
114 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
115 while ((tim_idx < (frame_size - 2)) &&
116 (beacon[tim_idx] != WLAN_EID_TIM))
117 tim_idx += beacon[tim_idx+1] + 2;
118
119 /* If TIM field was found, set variables */
120 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
121 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
122 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
123 } else
124 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
125 }
126
127 int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
128 {
129 struct iwl_tx_beacon_cmd *tx_beacon_cmd;
130 struct iwl_host_cmd cmd = {
131 .id = REPLY_TX_BEACON,
132 };
133 struct ieee80211_tx_info *info;
134 u32 frame_size;
135 u32 rate_flags;
136 u32 rate;
137
138 /*
139 * We have to set up the TX command, the TX Beacon command, and the
140 * beacon contents.
141 */
142
143 lockdep_assert_held(&priv->mutex);
144
145 if (!priv->beacon_ctx) {
146 IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
147 return 0;
148 }
149
150 if (WARN_ON(!priv->beacon_skb))
151 return -EINVAL;
152
153 /* Allocate beacon command */
154 if (!priv->beacon_cmd)
155 priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
156 tx_beacon_cmd = priv->beacon_cmd;
157 if (!tx_beacon_cmd)
158 return -ENOMEM;
159
160 frame_size = priv->beacon_skb->len;
161
162 /* Set up TX command fields */
163 tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
164 tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
165 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
166 tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
167 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
168
169 /* Set up TX beacon command fields */
170 iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
171 frame_size);
172
173 /* Set up packet rate and flags */
174 info = IEEE80211_SKB_CB(priv->beacon_skb);
175
176 /*
177 * Let's set up the rate at least somewhat correctly;
178 * it will currently not actually be used by the uCode,
179 * it uses the broadcast station's rate instead.
180 */
181 if (info->control.rates[0].idx < 0 ||
182 info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
183 rate = 0;
184 else
185 rate = info->control.rates[0].idx;
186
187 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
188 priv->hw_params.valid_tx_ant);
189 rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
190
191 /* In mac80211, rates for 5 GHz start at 0 */
192 if (info->band == IEEE80211_BAND_5GHZ)
193 rate += IWL_FIRST_OFDM_RATE;
194 else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
195 rate_flags |= RATE_MCS_CCK_MSK;
196
197 tx_beacon_cmd->tx.rate_n_flags =
198 iwl_hw_set_rate_n_flags(rate, rate_flags);
199
200 /* Submit command */
201 cmd.len[0] = sizeof(*tx_beacon_cmd);
202 cmd.data[0] = tx_beacon_cmd;
203 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
204 cmd.len[1] = frame_size;
205 cmd.data[1] = priv->beacon_skb->data;
206 cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
207
208 return iwl_send_cmd_sync(priv, &cmd);
209 }
210
211 static void iwl_bg_beacon_update(struct work_struct *work)
212 {
213 struct iwl_priv *priv =
214 container_of(work, struct iwl_priv, beacon_update);
215 struct sk_buff *beacon;
216
217 mutex_lock(&priv->mutex);
218 if (!priv->beacon_ctx) {
219 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
220 goto out;
221 }
222
223 if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
224 /*
225 * The ucode will send beacon notifications even in
226 * IBSS mode, but we don't want to process them. But
227 * we need to defer the type check to here due to
228 * requiring locking around the beacon_ctx access.
229 */
230 goto out;
231 }
232
233 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
234 beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
235 if (!beacon) {
236 IWL_ERR(priv, "update beacon failed -- keeping old\n");
237 goto out;
238 }
239
240 /* new beacon skb is allocated every time; dispose previous.*/
241 dev_kfree_skb(priv->beacon_skb);
242
243 priv->beacon_skb = beacon;
244
245 iwlagn_send_beacon_cmd(priv);
246 out:
247 mutex_unlock(&priv->mutex);
248 }
249
250 static void iwl_bg_bt_runtime_config(struct work_struct *work)
251 {
252 struct iwl_priv *priv =
253 container_of(work, struct iwl_priv, bt_runtime_config);
254
255 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
256 return;
257
258 /* dont send host command if rf-kill is on */
259 if (!iwl_is_ready_rf(priv))
260 return;
261 iwlagn_send_advance_bt_config(priv);
262 }
263
264 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
265 {
266 struct iwl_priv *priv =
267 container_of(work, struct iwl_priv, bt_full_concurrency);
268 struct iwl_rxon_context *ctx;
269
270 mutex_lock(&priv->mutex);
271
272 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
273 goto out;
274
275 /* dont send host command if rf-kill is on */
276 if (!iwl_is_ready_rf(priv))
277 goto out;
278
279 IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
280 priv->bt_full_concurrent ?
281 "full concurrency" : "3-wire");
282
283 /*
284 * LQ & RXON updated cmds must be sent before BT Config cmd
285 * to avoid 3-wire collisions
286 */
287 for_each_context(priv, ctx) {
288 iwlagn_set_rxon_chain(priv, ctx);
289 iwlagn_commit_rxon(priv, ctx);
290 }
291
292 iwlagn_send_advance_bt_config(priv);
293 out:
294 mutex_unlock(&priv->mutex);
295 }
296
297 /**
298 * iwl_bg_statistics_periodic - Timer callback to queue statistics
299 *
300 * This callback is provided in order to send a statistics request.
301 *
302 * This timer function is continually reset to execute within
303 * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
304 * was received. We need to ensure we receive the statistics in order
305 * to update the temperature used for calibrating the TXPOWER.
306 */
307 static void iwl_bg_statistics_periodic(unsigned long data)
308 {
309 struct iwl_priv *priv = (struct iwl_priv *)data;
310
311 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
312 return;
313
314 /* dont send host command if rf-kill is on */
315 if (!iwl_is_ready_rf(priv))
316 return;
317
318 iwl_send_statistics_request(priv, CMD_ASYNC, false);
319 }
320
321
322 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
323 u32 start_idx, u32 num_events,
324 u32 mode)
325 {
326 u32 i;
327 u32 ptr; /* SRAM byte address of log data */
328 u32 ev, time, data; /* event log data */
329 unsigned long reg_flags;
330
331 if (mode == 0)
332 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
333 else
334 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
335
336 /* Make sure device is powered up for SRAM reads */
337 spin_lock_irqsave(&priv->reg_lock, reg_flags);
338 if (iwl_grab_nic_access(priv)) {
339 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
340 return;
341 }
342
343 /* Set starting address; reads will auto-increment */
344 iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
345 rmb();
346
347 /*
348 * "time" is actually "data" for mode 0 (no timestamp).
349 * place event id # at far right for easier visual parsing.
350 */
351 for (i = 0; i < num_events; i++) {
352 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
353 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
354 if (mode == 0) {
355 trace_iwlwifi_dev_ucode_cont_event(priv,
356 0, time, ev);
357 } else {
358 data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
359 trace_iwlwifi_dev_ucode_cont_event(priv,
360 time, data, ev);
361 }
362 }
363 /* Allow device to power down */
364 iwl_release_nic_access(priv);
365 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
366 }
367
368 static void iwl_continuous_event_trace(struct iwl_priv *priv)
369 {
370 u32 capacity; /* event log capacity in # entries */
371 u32 base; /* SRAM byte address of event log header */
372 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
373 u32 num_wraps; /* # times uCode wrapped to top of log */
374 u32 next_entry; /* index of next entry to be written by uCode */
375
376 base = priv->device_pointers.error_event_table;
377 if (priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
378 capacity = iwl_read_targ_mem(priv, base);
379 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
380 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
381 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
382 } else
383 return;
384
385 if (num_wraps == priv->event_log.num_wraps) {
386 iwl_print_cont_event_trace(priv,
387 base, priv->event_log.next_entry,
388 next_entry - priv->event_log.next_entry,
389 mode);
390 priv->event_log.non_wraps_count++;
391 } else {
392 if ((num_wraps - priv->event_log.num_wraps) > 1)
393 priv->event_log.wraps_more_count++;
394 else
395 priv->event_log.wraps_once_count++;
396 trace_iwlwifi_dev_ucode_wrap_event(priv,
397 num_wraps - priv->event_log.num_wraps,
398 next_entry, priv->event_log.next_entry);
399 if (next_entry < priv->event_log.next_entry) {
400 iwl_print_cont_event_trace(priv, base,
401 priv->event_log.next_entry,
402 capacity - priv->event_log.next_entry,
403 mode);
404
405 iwl_print_cont_event_trace(priv, base, 0,
406 next_entry, mode);
407 } else {
408 iwl_print_cont_event_trace(priv, base,
409 next_entry, capacity - next_entry,
410 mode);
411
412 iwl_print_cont_event_trace(priv, base, 0,
413 next_entry, mode);
414 }
415 }
416 priv->event_log.num_wraps = num_wraps;
417 priv->event_log.next_entry = next_entry;
418 }
419
420 /**
421 * iwl_bg_ucode_trace - Timer callback to log ucode event
422 *
423 * The timer is continually set to execute every
424 * UCODE_TRACE_PERIOD milliseconds after the last timer expired
425 * this function is to perform continuous uCode event logging operation
426 * if enabled
427 */
428 static void iwl_bg_ucode_trace(unsigned long data)
429 {
430 struct iwl_priv *priv = (struct iwl_priv *)data;
431
432 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
433 return;
434
435 if (priv->event_log.ucode_trace) {
436 iwl_continuous_event_trace(priv);
437 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
438 mod_timer(&priv->ucode_trace,
439 jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
440 }
441 }
442
443 static void iwl_bg_tx_flush(struct work_struct *work)
444 {
445 struct iwl_priv *priv =
446 container_of(work, struct iwl_priv, tx_flush);
447
448 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
449 return;
450
451 /* do nothing if rf-kill is on */
452 if (!iwl_is_ready_rf(priv))
453 return;
454
455 IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
456 iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
457 }
458
459 /**
460 * iwl_rx_handle - Main entry function for receiving responses from uCode
461 *
462 * Uses the priv->rx_handlers callback function array to invoke
463 * the appropriate handlers, including command responses,
464 * frame-received notifications, and other notifications.
465 */
466 static void iwl_rx_handle(struct iwl_priv *priv)
467 {
468 struct iwl_rx_mem_buffer *rxb;
469 struct iwl_rx_packet *pkt;
470 struct iwl_rx_queue *rxq = &priv->rxq;
471 u32 r, i;
472 int reclaim;
473 unsigned long flags;
474 u8 fill_rx = 0;
475 u32 count = 8;
476 int total_empty;
477
478 /* uCode's read index (stored in shared DRAM) indicates the last Rx
479 * buffer that the driver may process (last buffer filled by ucode). */
480 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
481 i = rxq->read;
482
483 /* Rx interrupt, but nothing sent from uCode */
484 if (i == r)
485 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
486
487 /* calculate total frames need to be restock after handling RX */
488 total_empty = r - rxq->write_actual;
489 if (total_empty < 0)
490 total_empty += RX_QUEUE_SIZE;
491
492 if (total_empty > (RX_QUEUE_SIZE / 2))
493 fill_rx = 1;
494
495 while (i != r) {
496 int len;
497
498 rxb = rxq->queue[i];
499
500 /* If an RXB doesn't have a Rx queue slot associated with it,
501 * then a bug has been introduced in the queue refilling
502 * routines -- catch it here */
503 if (WARN_ON(rxb == NULL)) {
504 i = (i + 1) & RX_QUEUE_MASK;
505 continue;
506 }
507
508 rxq->queue[i] = NULL;
509
510 dma_unmap_page(priv->bus.dev, rxb->page_dma,
511 PAGE_SIZE << priv->hw_params.rx_page_order,
512 DMA_FROM_DEVICE);
513 pkt = rxb_addr(rxb);
514
515 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
516 len += sizeof(u32); /* account for status word */
517 trace_iwlwifi_dev_rx(priv, pkt, len);
518
519 /* Reclaim a command buffer only if this packet is a response
520 * to a (driver-originated) command.
521 * If the packet (e.g. Rx frame) originated from uCode,
522 * there is no command buffer to reclaim.
523 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
524 * but apparently a few don't get set; catch them here. */
525 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
526 (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
527 (pkt->hdr.cmd != REPLY_RX) &&
528 (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
529 (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
530 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
531 (pkt->hdr.cmd != REPLY_TX);
532
533 /*
534 * Do the notification wait before RX handlers so
535 * even if the RX handler consumes the RXB we have
536 * access to it in the notification wait entry.
537 */
538 if (!list_empty(&priv->_agn.notif_waits)) {
539 struct iwl_notification_wait *w;
540
541 spin_lock(&priv->_agn.notif_wait_lock);
542 list_for_each_entry(w, &priv->_agn.notif_waits, list) {
543 if (w->cmd == pkt->hdr.cmd) {
544 w->triggered = true;
545 if (w->fn)
546 w->fn(priv, pkt, w->fn_data);
547 }
548 }
549 spin_unlock(&priv->_agn.notif_wait_lock);
550
551 wake_up_all(&priv->_agn.notif_waitq);
552 }
553 if (priv->pre_rx_handler)
554 priv->pre_rx_handler(priv, rxb);
555
556 /* Based on type of command response or notification,
557 * handle those that need handling via function in
558 * rx_handlers table. See iwl_setup_rx_handlers() */
559 if (priv->rx_handlers[pkt->hdr.cmd]) {
560 IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
561 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
562 priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
563 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
564 } else {
565 /* No handling needed */
566 IWL_DEBUG_RX(priv,
567 "r %d i %d No handler needed for %s, 0x%02x\n",
568 r, i, get_cmd_string(pkt->hdr.cmd),
569 pkt->hdr.cmd);
570 }
571
572 /*
573 * XXX: After here, we should always check rxb->page
574 * against NULL before touching it or its virtual
575 * memory (pkt). Because some rx_handler might have
576 * already taken or freed the pages.
577 */
578
579 if (reclaim) {
580 /* Invoke any callbacks, transfer the buffer to caller,
581 * and fire off the (possibly) blocking iwl_send_cmd()
582 * as we reclaim the driver command queue */
583 if (rxb->page)
584 iwl_tx_cmd_complete(priv, rxb);
585 else
586 IWL_WARN(priv, "Claim null rxb?\n");
587 }
588
589 /* Reuse the page if possible. For notification packets and
590 * SKBs that fail to Rx correctly, add them back into the
591 * rx_free list for reuse later. */
592 spin_lock_irqsave(&rxq->lock, flags);
593 if (rxb->page != NULL) {
594 rxb->page_dma = dma_map_page(priv->bus.dev, rxb->page,
595 0, PAGE_SIZE << priv->hw_params.rx_page_order,
596 DMA_FROM_DEVICE);
597 list_add_tail(&rxb->list, &rxq->rx_free);
598 rxq->free_count++;
599 } else
600 list_add_tail(&rxb->list, &rxq->rx_used);
601
602 spin_unlock_irqrestore(&rxq->lock, flags);
603
604 i = (i + 1) & RX_QUEUE_MASK;
605 /* If there are a lot of unused frames,
606 * restock the Rx queue so ucode wont assert. */
607 if (fill_rx) {
608 count++;
609 if (count >= 8) {
610 rxq->read = i;
611 iwlagn_rx_replenish_now(priv);
612 count = 0;
613 }
614 }
615 }
616
617 /* Backtrack one entry */
618 rxq->read = i;
619 if (fill_rx)
620 iwlagn_rx_replenish_now(priv);
621 else
622 iwlagn_rx_queue_restock(priv);
623 }
624
625 /* tasklet for iwlagn interrupt */
626 static void iwl_irq_tasklet(struct iwl_priv *priv)
627 {
628 u32 inta = 0;
629 u32 handled = 0;
630 unsigned long flags;
631 u32 i;
632 #ifdef CONFIG_IWLWIFI_DEBUG
633 u32 inta_mask;
634 #endif
635
636 spin_lock_irqsave(&priv->lock, flags);
637
638 /* Ack/clear/reset pending uCode interrupts.
639 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
640 */
641 /* There is a hardware bug in the interrupt mask function that some
642 * interrupts (i.e. CSR_INT_BIT_SCD) can still be generated even if
643 * they are disabled in the CSR_INT_MASK register. Furthermore the
644 * ICT interrupt handling mechanism has another bug that might cause
645 * these unmasked interrupts fail to be detected. We workaround the
646 * hardware bugs here by ACKing all the possible interrupts so that
647 * interrupt coalescing can still be achieved.
648 */
649 iwl_write32(priv, CSR_INT, priv->_agn.inta | ~priv->inta_mask);
650
651 inta = priv->_agn.inta;
652
653 #ifdef CONFIG_IWLWIFI_DEBUG
654 if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
655 /* just for debug */
656 inta_mask = iwl_read32(priv, CSR_INT_MASK);
657 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
658 inta, inta_mask);
659 }
660 #endif
661
662 spin_unlock_irqrestore(&priv->lock, flags);
663
664 /* saved interrupt in inta variable now we can reset priv->_agn.inta */
665 priv->_agn.inta = 0;
666
667 /* Now service all interrupt bits discovered above. */
668 if (inta & CSR_INT_BIT_HW_ERR) {
669 IWL_ERR(priv, "Hardware error detected. Restarting.\n");
670
671 /* Tell the device to stop sending interrupts */
672 iwl_disable_interrupts(priv);
673
674 priv->isr_stats.hw++;
675 iwl_irq_handle_error(priv);
676
677 handled |= CSR_INT_BIT_HW_ERR;
678
679 return;
680 }
681
682 #ifdef CONFIG_IWLWIFI_DEBUG
683 if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
684 /* NIC fires this, but we don't use it, redundant with WAKEUP */
685 if (inta & CSR_INT_BIT_SCD) {
686 IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
687 "the frame/frames.\n");
688 priv->isr_stats.sch++;
689 }
690
691 /* Alive notification via Rx interrupt will do the real work */
692 if (inta & CSR_INT_BIT_ALIVE) {
693 IWL_DEBUG_ISR(priv, "Alive interrupt\n");
694 priv->isr_stats.alive++;
695 }
696 }
697 #endif
698 /* Safely ignore these bits for debug checks below */
699 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
700
701 /* HW RF KILL switch toggled */
702 if (inta & CSR_INT_BIT_RF_KILL) {
703 int hw_rf_kill = 0;
704 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
705 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
706 hw_rf_kill = 1;
707
708 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
709 hw_rf_kill ? "disable radio" : "enable radio");
710
711 priv->isr_stats.rfkill++;
712
713 /* driver only loads ucode once setting the interface up.
714 * the driver allows loading the ucode even if the radio
715 * is killed. Hence update the killswitch state here. The
716 * rfkill handler will care about restarting if needed.
717 */
718 if (!test_bit(STATUS_ALIVE, &priv->status)) {
719 if (hw_rf_kill)
720 set_bit(STATUS_RF_KILL_HW, &priv->status);
721 else
722 clear_bit(STATUS_RF_KILL_HW, &priv->status);
723 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
724 }
725
726 handled |= CSR_INT_BIT_RF_KILL;
727 }
728
729 /* Chip got too hot and stopped itself */
730 if (inta & CSR_INT_BIT_CT_KILL) {
731 IWL_ERR(priv, "Microcode CT kill error detected.\n");
732 priv->isr_stats.ctkill++;
733 handled |= CSR_INT_BIT_CT_KILL;
734 }
735
736 /* Error detected by uCode */
737 if (inta & CSR_INT_BIT_SW_ERR) {
738 IWL_ERR(priv, "Microcode SW error detected. "
739 " Restarting 0x%X.\n", inta);
740 priv->isr_stats.sw++;
741 iwl_irq_handle_error(priv);
742 handled |= CSR_INT_BIT_SW_ERR;
743 }
744
745 /* uCode wakes up after power-down sleep */
746 if (inta & CSR_INT_BIT_WAKEUP) {
747 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
748 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
749 for (i = 0; i < priv->hw_params.max_txq_num; i++)
750 iwl_txq_update_write_ptr(priv, &priv->txq[i]);
751
752 priv->isr_stats.wakeup++;
753
754 handled |= CSR_INT_BIT_WAKEUP;
755 }
756
757 /* All uCode command responses, including Tx command responses,
758 * Rx "responses" (frame-received notification), and other
759 * notifications from uCode come through here*/
760 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
761 CSR_INT_BIT_RX_PERIODIC)) {
762 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
763 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
764 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
765 iwl_write32(priv, CSR_FH_INT_STATUS,
766 CSR_FH_INT_RX_MASK);
767 }
768 if (inta & CSR_INT_BIT_RX_PERIODIC) {
769 handled |= CSR_INT_BIT_RX_PERIODIC;
770 iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
771 }
772 /* Sending RX interrupt require many steps to be done in the
773 * the device:
774 * 1- write interrupt to current index in ICT table.
775 * 2- dma RX frame.
776 * 3- update RX shared data to indicate last write index.
777 * 4- send interrupt.
778 * This could lead to RX race, driver could receive RX interrupt
779 * but the shared data changes does not reflect this;
780 * periodic interrupt will detect any dangling Rx activity.
781 */
782
783 /* Disable periodic interrupt; we use it as just a one-shot. */
784 iwl_write8(priv, CSR_INT_PERIODIC_REG,
785 CSR_INT_PERIODIC_DIS);
786 iwl_rx_handle(priv);
787
788 /*
789 * Enable periodic interrupt in 8 msec only if we received
790 * real RX interrupt (instead of just periodic int), to catch
791 * any dangling Rx interrupt. If it was just the periodic
792 * interrupt, there was no dangling Rx activity, and no need
793 * to extend the periodic interrupt; one-shot is enough.
794 */
795 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
796 iwl_write8(priv, CSR_INT_PERIODIC_REG,
797 CSR_INT_PERIODIC_ENA);
798
799 priv->isr_stats.rx++;
800 }
801
802 /* This "Tx" DMA channel is used only for loading uCode */
803 if (inta & CSR_INT_BIT_FH_TX) {
804 iwl_write32(priv, CSR_FH_INT_STATUS, CSR_FH_INT_TX_MASK);
805 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
806 priv->isr_stats.tx++;
807 handled |= CSR_INT_BIT_FH_TX;
808 /* Wake up uCode load routine, now that load is complete */
809 priv->ucode_write_complete = 1;
810 wake_up_interruptible(&priv->wait_command_queue);
811 }
812
813 if (inta & ~handled) {
814 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
815 priv->isr_stats.unhandled++;
816 }
817
818 if (inta & ~(priv->inta_mask)) {
819 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
820 inta & ~priv->inta_mask);
821 }
822
823 /* Re-enable all interrupts */
824 /* only Re-enable if disabled by irq */
825 if (test_bit(STATUS_INT_ENABLED, &priv->status))
826 iwl_enable_interrupts(priv);
827 /* Re-enable RF_KILL if it occurred */
828 else if (handled & CSR_INT_BIT_RF_KILL)
829 iwl_enable_rfkill_int(priv);
830 }
831
832 /*****************************************************************************
833 *
834 * sysfs attributes
835 *
836 *****************************************************************************/
837
838 #ifdef CONFIG_IWLWIFI_DEBUG
839
840 /*
841 * The following adds a new attribute to the sysfs representation
842 * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
843 * used for controlling the debug level.
844 *
845 * See the level definitions in iwl for details.
846 *
847 * The debug_level being managed using sysfs below is a per device debug
848 * level that is used instead of the global debug level if it (the per
849 * device debug level) is set.
850 */
851 static ssize_t show_debug_level(struct device *d,
852 struct device_attribute *attr, char *buf)
853 {
854 struct iwl_priv *priv = dev_get_drvdata(d);
855 return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
856 }
857 static ssize_t store_debug_level(struct device *d,
858 struct device_attribute *attr,
859 const char *buf, size_t count)
860 {
861 struct iwl_priv *priv = dev_get_drvdata(d);
862 unsigned long val;
863 int ret;
864
865 ret = strict_strtoul(buf, 0, &val);
866 if (ret)
867 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
868 else {
869 priv->debug_level = val;
870 if (iwl_alloc_traffic_mem(priv))
871 IWL_ERR(priv,
872 "Not enough memory to generate traffic log\n");
873 }
874 return strnlen(buf, count);
875 }
876
877 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
878 show_debug_level, store_debug_level);
879
880
881 #endif /* CONFIG_IWLWIFI_DEBUG */
882
883
884 static ssize_t show_temperature(struct device *d,
885 struct device_attribute *attr, char *buf)
886 {
887 struct iwl_priv *priv = dev_get_drvdata(d);
888
889 if (!iwl_is_alive(priv))
890 return -EAGAIN;
891
892 return sprintf(buf, "%d\n", priv->temperature);
893 }
894
895 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
896
897 static ssize_t show_tx_power(struct device *d,
898 struct device_attribute *attr, char *buf)
899 {
900 struct iwl_priv *priv = dev_get_drvdata(d);
901
902 if (!iwl_is_ready_rf(priv))
903 return sprintf(buf, "off\n");
904 else
905 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
906 }
907
908 static ssize_t store_tx_power(struct device *d,
909 struct device_attribute *attr,
910 const char *buf, size_t count)
911 {
912 struct iwl_priv *priv = dev_get_drvdata(d);
913 unsigned long val;
914 int ret;
915
916 ret = strict_strtoul(buf, 10, &val);
917 if (ret)
918 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
919 else {
920 ret = iwl_set_tx_power(priv, val, false);
921 if (ret)
922 IWL_ERR(priv, "failed setting tx power (0x%d).\n",
923 ret);
924 else
925 ret = count;
926 }
927 return ret;
928 }
929
930 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
931
932 static struct attribute *iwl_sysfs_entries[] = {
933 &dev_attr_temperature.attr,
934 &dev_attr_tx_power.attr,
935 #ifdef CONFIG_IWLWIFI_DEBUG
936 &dev_attr_debug_level.attr,
937 #endif
938 NULL
939 };
940
941 static struct attribute_group iwl_attribute_group = {
942 .name = NULL, /* put in device directory */
943 .attrs = iwl_sysfs_entries,
944 };
945
946 /******************************************************************************
947 *
948 * uCode download functions
949 *
950 ******************************************************************************/
951
952 static void iwl_free_fw_desc(struct iwl_priv *priv, struct fw_desc *desc)
953 {
954 if (desc->v_addr)
955 dma_free_coherent(priv->bus.dev, desc->len,
956 desc->v_addr, desc->p_addr);
957 desc->v_addr = NULL;
958 desc->len = 0;
959 }
960
961 static void iwl_free_fw_img(struct iwl_priv *priv, struct fw_img *img)
962 {
963 iwl_free_fw_desc(priv, &img->code);
964 iwl_free_fw_desc(priv, &img->data);
965 }
966
967 static void iwl_dealloc_ucode(struct iwl_priv *priv)
968 {
969 iwl_free_fw_img(priv, &priv->ucode_rt);
970 iwl_free_fw_img(priv, &priv->ucode_init);
971 }
972
973 static int iwl_alloc_fw_desc(struct iwl_priv *priv, struct fw_desc *desc,
974 const void *data, size_t len)
975 {
976 if (!len) {
977 desc->v_addr = NULL;
978 return -EINVAL;
979 }
980
981 desc->v_addr = dma_alloc_coherent(priv->bus.dev, len,
982 &desc->p_addr, GFP_KERNEL);
983 if (!desc->v_addr)
984 return -ENOMEM;
985
986 desc->len = len;
987 memcpy(desc->v_addr, data, len);
988 return 0;
989 }
990
991 struct iwlagn_ucode_capabilities {
992 u32 max_probe_length;
993 u32 standard_phy_calibration_size;
994 u32 flags;
995 };
996
997 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
998 static int iwl_mac_setup_register(struct iwl_priv *priv,
999 struct iwlagn_ucode_capabilities *capa);
1000
1001 #define UCODE_EXPERIMENTAL_INDEX 100
1002 #define UCODE_EXPERIMENTAL_TAG "exp"
1003
1004 static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first)
1005 {
1006 const char *name_pre = priv->cfg->fw_name_pre;
1007 char tag[8];
1008
1009 if (first) {
1010 #ifdef CONFIG_IWLWIFI_DEBUG_EXPERIMENTAL_UCODE
1011 priv->fw_index = UCODE_EXPERIMENTAL_INDEX;
1012 strcpy(tag, UCODE_EXPERIMENTAL_TAG);
1013 } else if (priv->fw_index == UCODE_EXPERIMENTAL_INDEX) {
1014 #endif
1015 priv->fw_index = priv->cfg->ucode_api_max;
1016 sprintf(tag, "%d", priv->fw_index);
1017 } else {
1018 priv->fw_index--;
1019 sprintf(tag, "%d", priv->fw_index);
1020 }
1021
1022 if (priv->fw_index < priv->cfg->ucode_api_min) {
1023 IWL_ERR(priv, "no suitable firmware found!\n");
1024 return -ENOENT;
1025 }
1026
1027 sprintf(priv->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
1028
1029 IWL_DEBUG_INFO(priv, "attempting to load firmware %s'%s'\n",
1030 (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1031 ? "EXPERIMENTAL " : "",
1032 priv->firmware_name);
1033
1034 return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name,
1035 priv->bus.dev,
1036 GFP_KERNEL, priv, iwl_ucode_callback);
1037 }
1038
1039 struct iwlagn_firmware_pieces {
1040 const void *inst, *data, *init, *init_data;
1041 size_t inst_size, data_size, init_size, init_data_size;
1042
1043 u32 build;
1044
1045 u32 init_evtlog_ptr, init_evtlog_size, init_errlog_ptr;
1046 u32 inst_evtlog_ptr, inst_evtlog_size, inst_errlog_ptr;
1047 };
1048
1049 static int iwlagn_load_legacy_firmware(struct iwl_priv *priv,
1050 const struct firmware *ucode_raw,
1051 struct iwlagn_firmware_pieces *pieces)
1052 {
1053 struct iwl_ucode_header *ucode = (void *)ucode_raw->data;
1054 u32 api_ver, hdr_size;
1055 const u8 *src;
1056
1057 priv->ucode_ver = le32_to_cpu(ucode->ver);
1058 api_ver = IWL_UCODE_API(priv->ucode_ver);
1059
1060 switch (api_ver) {
1061 default:
1062 hdr_size = 28;
1063 if (ucode_raw->size < hdr_size) {
1064 IWL_ERR(priv, "File size too small!\n");
1065 return -EINVAL;
1066 }
1067 pieces->build = le32_to_cpu(ucode->u.v2.build);
1068 pieces->inst_size = le32_to_cpu(ucode->u.v2.inst_size);
1069 pieces->data_size = le32_to_cpu(ucode->u.v2.data_size);
1070 pieces->init_size = le32_to_cpu(ucode->u.v2.init_size);
1071 pieces->init_data_size = le32_to_cpu(ucode->u.v2.init_data_size);
1072 src = ucode->u.v2.data;
1073 break;
1074 case 0:
1075 case 1:
1076 case 2:
1077 hdr_size = 24;
1078 if (ucode_raw->size < hdr_size) {
1079 IWL_ERR(priv, "File size too small!\n");
1080 return -EINVAL;
1081 }
1082 pieces->build = 0;
1083 pieces->inst_size = le32_to_cpu(ucode->u.v1.inst_size);
1084 pieces->data_size = le32_to_cpu(ucode->u.v1.data_size);
1085 pieces->init_size = le32_to_cpu(ucode->u.v1.init_size);
1086 pieces->init_data_size = le32_to_cpu(ucode->u.v1.init_data_size);
1087 src = ucode->u.v1.data;
1088 break;
1089 }
1090
1091 /* Verify size of file vs. image size info in file's header */
1092 if (ucode_raw->size != hdr_size + pieces->inst_size +
1093 pieces->data_size + pieces->init_size +
1094 pieces->init_data_size) {
1095
1096 IWL_ERR(priv,
1097 "uCode file size %d does not match expected size\n",
1098 (int)ucode_raw->size);
1099 return -EINVAL;
1100 }
1101
1102 pieces->inst = src;
1103 src += pieces->inst_size;
1104 pieces->data = src;
1105 src += pieces->data_size;
1106 pieces->init = src;
1107 src += pieces->init_size;
1108 pieces->init_data = src;
1109 src += pieces->init_data_size;
1110
1111 return 0;
1112 }
1113
1114 static int iwlagn_wanted_ucode_alternative = 1;
1115
1116 static int iwlagn_load_firmware(struct iwl_priv *priv,
1117 const struct firmware *ucode_raw,
1118 struct iwlagn_firmware_pieces *pieces,
1119 struct iwlagn_ucode_capabilities *capa)
1120 {
1121 struct iwl_tlv_ucode_header *ucode = (void *)ucode_raw->data;
1122 struct iwl_ucode_tlv *tlv;
1123 size_t len = ucode_raw->size;
1124 const u8 *data;
1125 int wanted_alternative = iwlagn_wanted_ucode_alternative, tmp;
1126 u64 alternatives;
1127 u32 tlv_len;
1128 enum iwl_ucode_tlv_type tlv_type;
1129 const u8 *tlv_data;
1130
1131 if (len < sizeof(*ucode)) {
1132 IWL_ERR(priv, "uCode has invalid length: %zd\n", len);
1133 return -EINVAL;
1134 }
1135
1136 if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC)) {
1137 IWL_ERR(priv, "invalid uCode magic: 0X%x\n",
1138 le32_to_cpu(ucode->magic));
1139 return -EINVAL;
1140 }
1141
1142 /*
1143 * Check which alternatives are present, and "downgrade"
1144 * when the chosen alternative is not present, warning
1145 * the user when that happens. Some files may not have
1146 * any alternatives, so don't warn in that case.
1147 */
1148 alternatives = le64_to_cpu(ucode->alternatives);
1149 tmp = wanted_alternative;
1150 if (wanted_alternative > 63)
1151 wanted_alternative = 63;
1152 while (wanted_alternative && !(alternatives & BIT(wanted_alternative)))
1153 wanted_alternative--;
1154 if (wanted_alternative && wanted_alternative != tmp)
1155 IWL_WARN(priv,
1156 "uCode alternative %d not available, choosing %d\n",
1157 tmp, wanted_alternative);
1158
1159 priv->ucode_ver = le32_to_cpu(ucode->ver);
1160 pieces->build = le32_to_cpu(ucode->build);
1161 data = ucode->data;
1162
1163 len -= sizeof(*ucode);
1164
1165 while (len >= sizeof(*tlv)) {
1166 u16 tlv_alt;
1167
1168 len -= sizeof(*tlv);
1169 tlv = (void *)data;
1170
1171 tlv_len = le32_to_cpu(tlv->length);
1172 tlv_type = le16_to_cpu(tlv->type);
1173 tlv_alt = le16_to_cpu(tlv->alternative);
1174 tlv_data = tlv->data;
1175
1176 if (len < tlv_len) {
1177 IWL_ERR(priv, "invalid TLV len: %zd/%u\n",
1178 len, tlv_len);
1179 return -EINVAL;
1180 }
1181 len -= ALIGN(tlv_len, 4);
1182 data += sizeof(*tlv) + ALIGN(tlv_len, 4);
1183
1184 /*
1185 * Alternative 0 is always valid.
1186 *
1187 * Skip alternative TLVs that are not selected.
1188 */
1189 if (tlv_alt != 0 && tlv_alt != wanted_alternative)
1190 continue;
1191
1192 switch (tlv_type) {
1193 case IWL_UCODE_TLV_INST:
1194 pieces->inst = tlv_data;
1195 pieces->inst_size = tlv_len;
1196 break;
1197 case IWL_UCODE_TLV_DATA:
1198 pieces->data = tlv_data;
1199 pieces->data_size = tlv_len;
1200 break;
1201 case IWL_UCODE_TLV_INIT:
1202 pieces->init = tlv_data;
1203 pieces->init_size = tlv_len;
1204 break;
1205 case IWL_UCODE_TLV_INIT_DATA:
1206 pieces->init_data = tlv_data;
1207 pieces->init_data_size = tlv_len;
1208 break;
1209 case IWL_UCODE_TLV_BOOT:
1210 IWL_ERR(priv, "Found unexpected BOOT ucode\n");
1211 break;
1212 case IWL_UCODE_TLV_PROBE_MAX_LEN:
1213 if (tlv_len != sizeof(u32))
1214 goto invalid_tlv_len;
1215 capa->max_probe_length =
1216 le32_to_cpup((__le32 *)tlv_data);
1217 break;
1218 case IWL_UCODE_TLV_PAN:
1219 if (tlv_len)
1220 goto invalid_tlv_len;
1221 capa->flags |= IWL_UCODE_TLV_FLAGS_PAN;
1222 break;
1223 case IWL_UCODE_TLV_FLAGS:
1224 /* must be at least one u32 */
1225 if (tlv_len < sizeof(u32))
1226 goto invalid_tlv_len;
1227 /* and a proper number of u32s */
1228 if (tlv_len % sizeof(u32))
1229 goto invalid_tlv_len;
1230 /*
1231 * This driver only reads the first u32 as
1232 * right now no more features are defined,
1233 * if that changes then either the driver
1234 * will not work with the new firmware, or
1235 * it'll not take advantage of new features.
1236 */
1237 capa->flags = le32_to_cpup((__le32 *)tlv_data);
1238 break;
1239 case IWL_UCODE_TLV_INIT_EVTLOG_PTR:
1240 if (tlv_len != sizeof(u32))
1241 goto invalid_tlv_len;
1242 pieces->init_evtlog_ptr =
1243 le32_to_cpup((__le32 *)tlv_data);
1244 break;
1245 case IWL_UCODE_TLV_INIT_EVTLOG_SIZE:
1246 if (tlv_len != sizeof(u32))
1247 goto invalid_tlv_len;
1248 pieces->init_evtlog_size =
1249 le32_to_cpup((__le32 *)tlv_data);
1250 break;
1251 case IWL_UCODE_TLV_INIT_ERRLOG_PTR:
1252 if (tlv_len != sizeof(u32))
1253 goto invalid_tlv_len;
1254 pieces->init_errlog_ptr =
1255 le32_to_cpup((__le32 *)tlv_data);
1256 break;
1257 case IWL_UCODE_TLV_RUNT_EVTLOG_PTR:
1258 if (tlv_len != sizeof(u32))
1259 goto invalid_tlv_len;
1260 pieces->inst_evtlog_ptr =
1261 le32_to_cpup((__le32 *)tlv_data);
1262 break;
1263 case IWL_UCODE_TLV_RUNT_EVTLOG_SIZE:
1264 if (tlv_len != sizeof(u32))
1265 goto invalid_tlv_len;
1266 pieces->inst_evtlog_size =
1267 le32_to_cpup((__le32 *)tlv_data);
1268 break;
1269 case IWL_UCODE_TLV_RUNT_ERRLOG_PTR:
1270 if (tlv_len != sizeof(u32))
1271 goto invalid_tlv_len;
1272 pieces->inst_errlog_ptr =
1273 le32_to_cpup((__le32 *)tlv_data);
1274 break;
1275 case IWL_UCODE_TLV_ENHANCE_SENS_TBL:
1276 if (tlv_len)
1277 goto invalid_tlv_len;
1278 priv->enhance_sensitivity_table = true;
1279 break;
1280 case IWL_UCODE_TLV_PHY_CALIBRATION_SIZE:
1281 if (tlv_len != sizeof(u32))
1282 goto invalid_tlv_len;
1283 capa->standard_phy_calibration_size =
1284 le32_to_cpup((__le32 *)tlv_data);
1285 break;
1286 default:
1287 IWL_DEBUG_INFO(priv, "unknown TLV: %d\n", tlv_type);
1288 break;
1289 }
1290 }
1291
1292 if (len) {
1293 IWL_ERR(priv, "invalid TLV after parsing: %zd\n", len);
1294 iwl_print_hex_dump(priv, IWL_DL_FW, (u8 *)data, len);
1295 return -EINVAL;
1296 }
1297
1298 return 0;
1299
1300 invalid_tlv_len:
1301 IWL_ERR(priv, "TLV %d has invalid size: %u\n", tlv_type, tlv_len);
1302 iwl_print_hex_dump(priv, IWL_DL_FW, tlv_data, tlv_len);
1303
1304 return -EINVAL;
1305 }
1306
1307 /**
1308 * iwl_ucode_callback - callback when firmware was loaded
1309 *
1310 * If loaded successfully, copies the firmware into buffers
1311 * for the card to fetch (via DMA).
1312 */
1313 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
1314 {
1315 struct iwl_priv *priv = context;
1316 struct iwl_ucode_header *ucode;
1317 int err;
1318 struct iwlagn_firmware_pieces pieces;
1319 const unsigned int api_max = priv->cfg->ucode_api_max;
1320 const unsigned int api_min = priv->cfg->ucode_api_min;
1321 u32 api_ver;
1322 char buildstr[25];
1323 u32 build;
1324 struct iwlagn_ucode_capabilities ucode_capa = {
1325 .max_probe_length = 200,
1326 .standard_phy_calibration_size =
1327 IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE,
1328 };
1329
1330 memset(&pieces, 0, sizeof(pieces));
1331
1332 if (!ucode_raw) {
1333 if (priv->fw_index <= priv->cfg->ucode_api_max)
1334 IWL_ERR(priv,
1335 "request for firmware file '%s' failed.\n",
1336 priv->firmware_name);
1337 goto try_again;
1338 }
1339
1340 IWL_DEBUG_INFO(priv, "Loaded firmware file '%s' (%zd bytes).\n",
1341 priv->firmware_name, ucode_raw->size);
1342
1343 /* Make sure that we got at least the API version number */
1344 if (ucode_raw->size < 4) {
1345 IWL_ERR(priv, "File size way too small!\n");
1346 goto try_again;
1347 }
1348
1349 /* Data from ucode file: header followed by uCode images */
1350 ucode = (struct iwl_ucode_header *)ucode_raw->data;
1351
1352 if (ucode->ver)
1353 err = iwlagn_load_legacy_firmware(priv, ucode_raw, &pieces);
1354 else
1355 err = iwlagn_load_firmware(priv, ucode_raw, &pieces,
1356 &ucode_capa);
1357
1358 if (err)
1359 goto try_again;
1360
1361 api_ver = IWL_UCODE_API(priv->ucode_ver);
1362 build = pieces.build;
1363
1364 /*
1365 * api_ver should match the api version forming part of the
1366 * firmware filename ... but we don't check for that and only rely
1367 * on the API version read from firmware header from here on forward
1368 */
1369 /* no api version check required for experimental uCode */
1370 if (priv->fw_index != UCODE_EXPERIMENTAL_INDEX) {
1371 if (api_ver < api_min || api_ver > api_max) {
1372 IWL_ERR(priv,
1373 "Driver unable to support your firmware API. "
1374 "Driver supports v%u, firmware is v%u.\n",
1375 api_max, api_ver);
1376 goto try_again;
1377 }
1378
1379 if (api_ver != api_max)
1380 IWL_ERR(priv,
1381 "Firmware has old API version. Expected v%u, "
1382 "got v%u. New firmware can be obtained "
1383 "from http://www.intellinuxwireless.org.\n",
1384 api_max, api_ver);
1385 }
1386
1387 if (build)
1388 sprintf(buildstr, " build %u%s", build,
1389 (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1390 ? " (EXP)" : "");
1391 else
1392 buildstr[0] = '\0';
1393
1394 IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u%s\n",
1395 IWL_UCODE_MAJOR(priv->ucode_ver),
1396 IWL_UCODE_MINOR(priv->ucode_ver),
1397 IWL_UCODE_API(priv->ucode_ver),
1398 IWL_UCODE_SERIAL(priv->ucode_ver),
1399 buildstr);
1400
1401 snprintf(priv->hw->wiphy->fw_version,
1402 sizeof(priv->hw->wiphy->fw_version),
1403 "%u.%u.%u.%u%s",
1404 IWL_UCODE_MAJOR(priv->ucode_ver),
1405 IWL_UCODE_MINOR(priv->ucode_ver),
1406 IWL_UCODE_API(priv->ucode_ver),
1407 IWL_UCODE_SERIAL(priv->ucode_ver),
1408 buildstr);
1409
1410 /*
1411 * For any of the failures below (before allocating pci memory)
1412 * we will try to load a version with a smaller API -- maybe the
1413 * user just got a corrupted version of the latest API.
1414 */
1415
1416 IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1417 priv->ucode_ver);
1418 IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %Zd\n",
1419 pieces.inst_size);
1420 IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %Zd\n",
1421 pieces.data_size);
1422 IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %Zd\n",
1423 pieces.init_size);
1424 IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %Zd\n",
1425 pieces.init_data_size);
1426
1427 /* Verify that uCode images will fit in card's SRAM */
1428 if (pieces.inst_size > priv->hw_params.max_inst_size) {
1429 IWL_ERR(priv, "uCode instr len %Zd too large to fit in\n",
1430 pieces.inst_size);
1431 goto try_again;
1432 }
1433
1434 if (pieces.data_size > priv->hw_params.max_data_size) {
1435 IWL_ERR(priv, "uCode data len %Zd too large to fit in\n",
1436 pieces.data_size);
1437 goto try_again;
1438 }
1439
1440 if (pieces.init_size > priv->hw_params.max_inst_size) {
1441 IWL_ERR(priv, "uCode init instr len %Zd too large to fit in\n",
1442 pieces.init_size);
1443 goto try_again;
1444 }
1445
1446 if (pieces.init_data_size > priv->hw_params.max_data_size) {
1447 IWL_ERR(priv, "uCode init data len %Zd too large to fit in\n",
1448 pieces.init_data_size);
1449 goto try_again;
1450 }
1451
1452 /* Allocate ucode buffers for card's bus-master loading ... */
1453
1454 /* Runtime instructions and 2 copies of data:
1455 * 1) unmodified from disk
1456 * 2) backup cache for save/restore during power-downs */
1457 if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.code,
1458 pieces.inst, pieces.inst_size))
1459 goto err_pci_alloc;
1460 if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.data,
1461 pieces.data, pieces.data_size))
1462 goto err_pci_alloc;
1463
1464 /* Initialization instructions and data */
1465 if (pieces.init_size && pieces.init_data_size) {
1466 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.code,
1467 pieces.init, pieces.init_size))
1468 goto err_pci_alloc;
1469 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.data,
1470 pieces.init_data, pieces.init_data_size))
1471 goto err_pci_alloc;
1472 }
1473
1474 /* Now that we can no longer fail, copy information */
1475
1476 /*
1477 * The (size - 16) / 12 formula is based on the information recorded
1478 * for each event, which is of mode 1 (including timestamp) for all
1479 * new microcodes that include this information.
1480 */
1481 priv->_agn.init_evtlog_ptr = pieces.init_evtlog_ptr;
1482 if (pieces.init_evtlog_size)
1483 priv->_agn.init_evtlog_size = (pieces.init_evtlog_size - 16)/12;
1484 else
1485 priv->_agn.init_evtlog_size =
1486 priv->cfg->base_params->max_event_log_size;
1487 priv->_agn.init_errlog_ptr = pieces.init_errlog_ptr;
1488 priv->_agn.inst_evtlog_ptr = pieces.inst_evtlog_ptr;
1489 if (pieces.inst_evtlog_size)
1490 priv->_agn.inst_evtlog_size = (pieces.inst_evtlog_size - 16)/12;
1491 else
1492 priv->_agn.inst_evtlog_size =
1493 priv->cfg->base_params->max_event_log_size;
1494 priv->_agn.inst_errlog_ptr = pieces.inst_errlog_ptr;
1495
1496 priv->new_scan_threshold_behaviour =
1497 !!(ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1498
1499 if ((priv->cfg->sku & EEPROM_SKU_CAP_IPAN_ENABLE) &&
1500 (ucode_capa.flags & IWL_UCODE_TLV_FLAGS_PAN)) {
1501 priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
1502 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1503 } else
1504 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1505
1506 if (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS))
1507 priv->cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1508 else
1509 priv->cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1510
1511 /*
1512 * figure out the offset of chain noise reset and gain commands
1513 * base on the size of standard phy calibration commands table size
1514 */
1515 if (ucode_capa.standard_phy_calibration_size >
1516 IWL_MAX_PHY_CALIBRATE_TBL_SIZE)
1517 ucode_capa.standard_phy_calibration_size =
1518 IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE;
1519
1520 priv->_agn.phy_calib_chain_noise_reset_cmd =
1521 ucode_capa.standard_phy_calibration_size;
1522 priv->_agn.phy_calib_chain_noise_gain_cmd =
1523 ucode_capa.standard_phy_calibration_size + 1;
1524
1525 /**************************************************
1526 * This is still part of probe() in a sense...
1527 *
1528 * 9. Setup and register with mac80211 and debugfs
1529 **************************************************/
1530 err = iwl_mac_setup_register(priv, &ucode_capa);
1531 if (err)
1532 goto out_unbind;
1533
1534 err = iwl_dbgfs_register(priv, DRV_NAME);
1535 if (err)
1536 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
1537
1538 err = sysfs_create_group(&(priv->bus.dev->kobj),
1539 &iwl_attribute_group);
1540 if (err) {
1541 IWL_ERR(priv, "failed to create sysfs device attributes\n");
1542 goto out_unbind;
1543 }
1544
1545 /* We have our copies now, allow OS release its copies */
1546 release_firmware(ucode_raw);
1547 complete(&priv->_agn.firmware_loading_complete);
1548 return;
1549
1550 try_again:
1551 /* try next, if any */
1552 if (iwl_request_firmware(priv, false))
1553 goto out_unbind;
1554 release_firmware(ucode_raw);
1555 return;
1556
1557 err_pci_alloc:
1558 IWL_ERR(priv, "failed to allocate pci memory\n");
1559 iwl_dealloc_ucode(priv);
1560 out_unbind:
1561 complete(&priv->_agn.firmware_loading_complete);
1562 device_release_driver(priv->bus.dev);
1563 release_firmware(ucode_raw);
1564 }
1565
1566 static const char *desc_lookup_text[] = {
1567 "OK",
1568 "FAIL",
1569 "BAD_PARAM",
1570 "BAD_CHECKSUM",
1571 "NMI_INTERRUPT_WDG",
1572 "SYSASSERT",
1573 "FATAL_ERROR",
1574 "BAD_COMMAND",
1575 "HW_ERROR_TUNE_LOCK",
1576 "HW_ERROR_TEMPERATURE",
1577 "ILLEGAL_CHAN_FREQ",
1578 "VCC_NOT_STABLE",
1579 "FH_ERROR",
1580 "NMI_INTERRUPT_HOST",
1581 "NMI_INTERRUPT_ACTION_PT",
1582 "NMI_INTERRUPT_UNKNOWN",
1583 "UCODE_VERSION_MISMATCH",
1584 "HW_ERROR_ABS_LOCK",
1585 "HW_ERROR_CAL_LOCK_FAIL",
1586 "NMI_INTERRUPT_INST_ACTION_PT",
1587 "NMI_INTERRUPT_DATA_ACTION_PT",
1588 "NMI_TRM_HW_ER",
1589 "NMI_INTERRUPT_TRM",
1590 "NMI_INTERRUPT_BREAK_POINT"
1591 "DEBUG_0",
1592 "DEBUG_1",
1593 "DEBUG_2",
1594 "DEBUG_3",
1595 };
1596
1597 static struct { char *name; u8 num; } advanced_lookup[] = {
1598 { "NMI_INTERRUPT_WDG", 0x34 },
1599 { "SYSASSERT", 0x35 },
1600 { "UCODE_VERSION_MISMATCH", 0x37 },
1601 { "BAD_COMMAND", 0x38 },
1602 { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
1603 { "FATAL_ERROR", 0x3D },
1604 { "NMI_TRM_HW_ERR", 0x46 },
1605 { "NMI_INTERRUPT_TRM", 0x4C },
1606 { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
1607 { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
1608 { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
1609 { "NMI_INTERRUPT_HOST", 0x66 },
1610 { "NMI_INTERRUPT_ACTION_PT", 0x7C },
1611 { "NMI_INTERRUPT_UNKNOWN", 0x84 },
1612 { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
1613 { "ADVANCED_SYSASSERT", 0 },
1614 };
1615
1616 static const char *desc_lookup(u32 num)
1617 {
1618 int i;
1619 int max = ARRAY_SIZE(desc_lookup_text);
1620
1621 if (num < max)
1622 return desc_lookup_text[num];
1623
1624 max = ARRAY_SIZE(advanced_lookup) - 1;
1625 for (i = 0; i < max; i++) {
1626 if (advanced_lookup[i].num == num)
1627 break;
1628 }
1629 return advanced_lookup[i].name;
1630 }
1631
1632 #define ERROR_START_OFFSET (1 * sizeof(u32))
1633 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
1634
1635 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1636 {
1637 u32 base;
1638 struct iwl_error_event_table table;
1639
1640 base = priv->device_pointers.error_event_table;
1641 if (priv->ucode_type == IWL_UCODE_INIT) {
1642 if (!base)
1643 base = priv->_agn.init_errlog_ptr;
1644 } else {
1645 if (!base)
1646 base = priv->_agn.inst_errlog_ptr;
1647 }
1648
1649 if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1650 IWL_ERR(priv,
1651 "Not valid error log pointer 0x%08X for %s uCode\n",
1652 base,
1653 (priv->ucode_type == IWL_UCODE_INIT)
1654 ? "Init" : "RT");
1655 return;
1656 }
1657
1658 iwl_read_targ_mem_words(priv, base, &table, sizeof(table));
1659
1660 if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
1661 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1662 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1663 priv->status, table.valid);
1664 }
1665
1666 priv->isr_stats.err_code = table.error_id;
1667
1668 trace_iwlwifi_dev_ucode_error(priv, table.error_id, table.tsf_low,
1669 table.data1, table.data2, table.line,
1670 table.blink1, table.blink2, table.ilink1,
1671 table.ilink2, table.bcon_time, table.gp1,
1672 table.gp2, table.gp3, table.ucode_ver,
1673 table.hw_ver, table.brd_ver);
1674 IWL_ERR(priv, "0x%08X | %-28s\n", table.error_id,
1675 desc_lookup(table.error_id));
1676 IWL_ERR(priv, "0x%08X | uPc\n", table.pc);
1677 IWL_ERR(priv, "0x%08X | branchlink1\n", table.blink1);
1678 IWL_ERR(priv, "0x%08X | branchlink2\n", table.blink2);
1679 IWL_ERR(priv, "0x%08X | interruptlink1\n", table.ilink1);
1680 IWL_ERR(priv, "0x%08X | interruptlink2\n", table.ilink2);
1681 IWL_ERR(priv, "0x%08X | data1\n", table.data1);
1682 IWL_ERR(priv, "0x%08X | data2\n", table.data2);
1683 IWL_ERR(priv, "0x%08X | line\n", table.line);
1684 IWL_ERR(priv, "0x%08X | beacon time\n", table.bcon_time);
1685 IWL_ERR(priv, "0x%08X | tsf low\n", table.tsf_low);
1686 IWL_ERR(priv, "0x%08X | tsf hi\n", table.tsf_hi);
1687 IWL_ERR(priv, "0x%08X | time gp1\n", table.gp1);
1688 IWL_ERR(priv, "0x%08X | time gp2\n", table.gp2);
1689 IWL_ERR(priv, "0x%08X | time gp3\n", table.gp3);
1690 IWL_ERR(priv, "0x%08X | uCode version\n", table.ucode_ver);
1691 IWL_ERR(priv, "0x%08X | hw version\n", table.hw_ver);
1692 IWL_ERR(priv, "0x%08X | board version\n", table.brd_ver);
1693 IWL_ERR(priv, "0x%08X | hcmd\n", table.hcmd);
1694 }
1695
1696 #define EVENT_START_OFFSET (4 * sizeof(u32))
1697
1698 /**
1699 * iwl_print_event_log - Dump error event log to syslog
1700 *
1701 */
1702 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1703 u32 num_events, u32 mode,
1704 int pos, char **buf, size_t bufsz)
1705 {
1706 u32 i;
1707 u32 base; /* SRAM byte address of event log header */
1708 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1709 u32 ptr; /* SRAM byte address of log data */
1710 u32 ev, time, data; /* event log data */
1711 unsigned long reg_flags;
1712
1713 if (num_events == 0)
1714 return pos;
1715
1716 base = priv->device_pointers.log_event_table;
1717 if (priv->ucode_type == IWL_UCODE_INIT) {
1718 if (!base)
1719 base = priv->_agn.init_evtlog_ptr;
1720 } else {
1721 if (!base)
1722 base = priv->_agn.inst_evtlog_ptr;
1723 }
1724
1725 if (mode == 0)
1726 event_size = 2 * sizeof(u32);
1727 else
1728 event_size = 3 * sizeof(u32);
1729
1730 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1731
1732 /* Make sure device is powered up for SRAM reads */
1733 spin_lock_irqsave(&priv->reg_lock, reg_flags);
1734 iwl_grab_nic_access(priv);
1735
1736 /* Set starting address; reads will auto-increment */
1737 iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
1738 rmb();
1739
1740 /* "time" is actually "data" for mode 0 (no timestamp).
1741 * place event id # at far right for easier visual parsing. */
1742 for (i = 0; i < num_events; i++) {
1743 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1744 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1745 if (mode == 0) {
1746 /* data, ev */
1747 if (bufsz) {
1748 pos += scnprintf(*buf + pos, bufsz - pos,
1749 "EVT_LOG:0x%08x:%04u\n",
1750 time, ev);
1751 } else {
1752 trace_iwlwifi_dev_ucode_event(priv, 0,
1753 time, ev);
1754 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1755 time, ev);
1756 }
1757 } else {
1758 data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1759 if (bufsz) {
1760 pos += scnprintf(*buf + pos, bufsz - pos,
1761 "EVT_LOGT:%010u:0x%08x:%04u\n",
1762 time, data, ev);
1763 } else {
1764 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1765 time, data, ev);
1766 trace_iwlwifi_dev_ucode_event(priv, time,
1767 data, ev);
1768 }
1769 }
1770 }
1771
1772 /* Allow device to power down */
1773 iwl_release_nic_access(priv);
1774 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1775 return pos;
1776 }
1777
1778 /**
1779 * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1780 */
1781 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1782 u32 num_wraps, u32 next_entry,
1783 u32 size, u32 mode,
1784 int pos, char **buf, size_t bufsz)
1785 {
1786 /*
1787 * display the newest DEFAULT_LOG_ENTRIES entries
1788 * i.e the entries just before the next ont that uCode would fill.
1789 */
1790 if (num_wraps) {
1791 if (next_entry < size) {
1792 pos = iwl_print_event_log(priv,
1793 capacity - (size - next_entry),
1794 size - next_entry, mode,
1795 pos, buf, bufsz);
1796 pos = iwl_print_event_log(priv, 0,
1797 next_entry, mode,
1798 pos, buf, bufsz);
1799 } else
1800 pos = iwl_print_event_log(priv, next_entry - size,
1801 size, mode, pos, buf, bufsz);
1802 } else {
1803 if (next_entry < size) {
1804 pos = iwl_print_event_log(priv, 0, next_entry,
1805 mode, pos, buf, bufsz);
1806 } else {
1807 pos = iwl_print_event_log(priv, next_entry - size,
1808 size, mode, pos, buf, bufsz);
1809 }
1810 }
1811 return pos;
1812 }
1813
1814 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1815
1816 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1817 char **buf, bool display)
1818 {
1819 u32 base; /* SRAM byte address of event log header */
1820 u32 capacity; /* event log capacity in # entries */
1821 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
1822 u32 num_wraps; /* # times uCode wrapped to top of log */
1823 u32 next_entry; /* index of next entry to be written by uCode */
1824 u32 size; /* # entries that we'll print */
1825 u32 logsize;
1826 int pos = 0;
1827 size_t bufsz = 0;
1828
1829 base = priv->device_pointers.log_event_table;
1830 if (priv->ucode_type == IWL_UCODE_INIT) {
1831 logsize = priv->_agn.init_evtlog_size;
1832 if (!base)
1833 base = priv->_agn.init_evtlog_ptr;
1834 } else {
1835 logsize = priv->_agn.inst_evtlog_size;
1836 if (!base)
1837 base = priv->_agn.inst_evtlog_ptr;
1838 }
1839
1840 if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1841 IWL_ERR(priv,
1842 "Invalid event log pointer 0x%08X for %s uCode\n",
1843 base,
1844 (priv->ucode_type == IWL_UCODE_INIT)
1845 ? "Init" : "RT");
1846 return -EINVAL;
1847 }
1848
1849 /* event log header */
1850 capacity = iwl_read_targ_mem(priv, base);
1851 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1852 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1853 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1854
1855 if (capacity > logsize) {
1856 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1857 capacity, logsize);
1858 capacity = logsize;
1859 }
1860
1861 if (next_entry > logsize) {
1862 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1863 next_entry, logsize);
1864 next_entry = logsize;
1865 }
1866
1867 size = num_wraps ? capacity : next_entry;
1868
1869 /* bail out if nothing in log */
1870 if (size == 0) {
1871 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1872 return pos;
1873 }
1874
1875 /* enable/disable bt channel inhibition */
1876 priv->bt_ch_announce = iwlagn_bt_ch_announce;
1877
1878 #ifdef CONFIG_IWLWIFI_DEBUG
1879 if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1880 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1881 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1882 #else
1883 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1884 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1885 #endif
1886 IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
1887 size);
1888
1889 #ifdef CONFIG_IWLWIFI_DEBUG
1890 if (display) {
1891 if (full_log)
1892 bufsz = capacity * 48;
1893 else
1894 bufsz = size * 48;
1895 *buf = kmalloc(bufsz, GFP_KERNEL);
1896 if (!*buf)
1897 return -ENOMEM;
1898 }
1899 if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1900 /*
1901 * if uCode has wrapped back to top of log,
1902 * start at the oldest entry,
1903 * i.e the next one that uCode would fill.
1904 */
1905 if (num_wraps)
1906 pos = iwl_print_event_log(priv, next_entry,
1907 capacity - next_entry, mode,
1908 pos, buf, bufsz);
1909 /* (then/else) start at top of log */
1910 pos = iwl_print_event_log(priv, 0,
1911 next_entry, mode, pos, buf, bufsz);
1912 } else
1913 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1914 next_entry, size, mode,
1915 pos, buf, bufsz);
1916 #else
1917 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1918 next_entry, size, mode,
1919 pos, buf, bufsz);
1920 #endif
1921 return pos;
1922 }
1923
1924 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1925 {
1926 struct iwl_ct_kill_config cmd;
1927 struct iwl_ct_kill_throttling_config adv_cmd;
1928 unsigned long flags;
1929 int ret = 0;
1930
1931 spin_lock_irqsave(&priv->lock, flags);
1932 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1933 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1934 spin_unlock_irqrestore(&priv->lock, flags);
1935 priv->thermal_throttle.ct_kill_toggle = false;
1936
1937 if (priv->cfg->base_params->support_ct_kill_exit) {
1938 adv_cmd.critical_temperature_enter =
1939 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1940 adv_cmd.critical_temperature_exit =
1941 cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1942
1943 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1944 sizeof(adv_cmd), &adv_cmd);
1945 if (ret)
1946 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1947 else
1948 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1949 "succeeded, "
1950 "critical temperature enter is %d,"
1951 "exit is %d\n",
1952 priv->hw_params.ct_kill_threshold,
1953 priv->hw_params.ct_kill_exit_threshold);
1954 } else {
1955 cmd.critical_temperature_R =
1956 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1957
1958 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1959 sizeof(cmd), &cmd);
1960 if (ret)
1961 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1962 else
1963 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1964 "succeeded, "
1965 "critical temperature is %d\n",
1966 priv->hw_params.ct_kill_threshold);
1967 }
1968 }
1969
1970 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
1971 {
1972 struct iwl_calib_cfg_cmd calib_cfg_cmd;
1973 struct iwl_host_cmd cmd = {
1974 .id = CALIBRATION_CFG_CMD,
1975 .len = { sizeof(struct iwl_calib_cfg_cmd), },
1976 .data = { &calib_cfg_cmd, },
1977 };
1978
1979 memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
1980 calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_INIT_CFG_ALL;
1981 calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
1982
1983 return iwl_send_cmd(priv, &cmd);
1984 }
1985
1986
1987 /**
1988 * iwl_alive_start - called after REPLY_ALIVE notification received
1989 * from protocol/runtime uCode (initialization uCode's
1990 * Alive gets handled by iwl_init_alive_start()).
1991 */
1992 int iwl_alive_start(struct iwl_priv *priv)
1993 {
1994 int ret = 0;
1995 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1996
1997 iwl_reset_ict(priv);
1998
1999 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2000
2001 /* After the ALIVE response, we can send host commands to the uCode */
2002 set_bit(STATUS_ALIVE, &priv->status);
2003
2004 /* Enable watchdog to monitor the driver tx queues */
2005 iwl_setup_watchdog(priv);
2006
2007 if (iwl_is_rfkill(priv))
2008 return -ERFKILL;
2009
2010 /* download priority table before any calibration request */
2011 if (priv->cfg->bt_params &&
2012 priv->cfg->bt_params->advanced_bt_coexist) {
2013 /* Configure Bluetooth device coexistence support */
2014 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
2015 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
2016 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
2017 iwlagn_send_advance_bt_config(priv);
2018 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
2019 iwlagn_send_prio_tbl(priv);
2020
2021 /* FIXME: w/a to force change uCode BT state machine */
2022 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
2023 BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2024 if (ret)
2025 return ret;
2026 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
2027 BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2028 if (ret)
2029 return ret;
2030 } else {
2031 /*
2032 * default is 2-wire BT coexexistence support
2033 */
2034 iwl_send_bt_config(priv);
2035 }
2036
2037 if (priv->hw_params.calib_rt_cfg)
2038 iwlagn_send_calib_cfg_rt(priv, priv->hw_params.calib_rt_cfg);
2039
2040 ieee80211_wake_queues(priv->hw);
2041
2042 priv->active_rate = IWL_RATES_MASK;
2043
2044 /* Configure Tx antenna selection based on H/W config */
2045 iwlagn_send_tx_ant_config(priv, priv->cfg->valid_tx_ant);
2046
2047 if (iwl_is_associated_ctx(ctx)) {
2048 struct iwl_rxon_cmd *active_rxon =
2049 (struct iwl_rxon_cmd *)&ctx->active;
2050 /* apply any changes in staging */
2051 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2052 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2053 } else {
2054 struct iwl_rxon_context *tmp;
2055 /* Initialize our rx_config data */
2056 for_each_context(priv, tmp)
2057 iwl_connection_init_rx_config(priv, tmp);
2058
2059 iwlagn_set_rxon_chain(priv, ctx);
2060 }
2061
2062 iwl_reset_run_time_calib(priv);
2063
2064 set_bit(STATUS_READY, &priv->status);
2065
2066 /* Configure the adapter for unassociated operation */
2067 ret = iwlagn_commit_rxon(priv, ctx);
2068 if (ret)
2069 return ret;
2070
2071 /* At this point, the NIC is initialized and operational */
2072 iwl_rf_kill_ct_config(priv);
2073
2074 IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2075
2076 return iwl_power_update_mode(priv, true);
2077 }
2078
2079 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2080
2081 static void __iwl_down(struct iwl_priv *priv)
2082 {
2083 int exit_pending;
2084
2085 IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2086
2087 iwl_scan_cancel_timeout(priv, 200);
2088
2089 exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
2090
2091 /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
2092 * to prevent rearm timer */
2093 del_timer_sync(&priv->watchdog);
2094
2095 iwl_clear_ucode_stations(priv, NULL);
2096 iwl_dealloc_bcast_stations(priv);
2097 iwl_clear_driver_stations(priv);
2098
2099 /* reset BT coex data */
2100 priv->bt_status = 0;
2101 if (priv->cfg->bt_params)
2102 priv->bt_traffic_load =
2103 priv->cfg->bt_params->bt_init_traffic_load;
2104 else
2105 priv->bt_traffic_load = 0;
2106 priv->bt_full_concurrent = false;
2107 priv->bt_ci_compliance = 0;
2108
2109 /* Wipe out the EXIT_PENDING status bit if we are not actually
2110 * exiting the module */
2111 if (!exit_pending)
2112 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2113
2114 if (priv->mac80211_registered)
2115 ieee80211_stop_queues(priv->hw);
2116
2117 /* Clear out all status bits but a few that are stable across reset */
2118 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2119 STATUS_RF_KILL_HW |
2120 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2121 STATUS_GEO_CONFIGURED |
2122 test_bit(STATUS_FW_ERROR, &priv->status) <<
2123 STATUS_FW_ERROR |
2124 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2125 STATUS_EXIT_PENDING;
2126
2127 iwlagn_stop_device(priv);
2128
2129 dev_kfree_skb(priv->beacon_skb);
2130 priv->beacon_skb = NULL;
2131 }
2132
2133 static void iwl_down(struct iwl_priv *priv)
2134 {
2135 mutex_lock(&priv->mutex);
2136 __iwl_down(priv);
2137 mutex_unlock(&priv->mutex);
2138
2139 iwl_cancel_deferred_work(priv);
2140 }
2141
2142 #define HW_READY_TIMEOUT (50)
2143
2144 /* Note: returns poll_bit return value, which is >= 0 if success */
2145 static int iwl_set_hw_ready(struct iwl_priv *priv)
2146 {
2147 int ret;
2148
2149 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2150 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2151
2152 /* See if we got it */
2153 ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2154 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2155 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2156 HW_READY_TIMEOUT);
2157
2158 IWL_DEBUG_INFO(priv, "hardware%s ready\n", ret < 0 ? " not" : "");
2159 return ret;
2160 }
2161
2162 /* Note: returns standard 0/-ERROR code */
2163 int iwl_prepare_card_hw(struct iwl_priv *priv)
2164 {
2165 int ret;
2166
2167 IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter\n");
2168
2169 ret = iwl_set_hw_ready(priv);
2170 if (ret >= 0)
2171 return 0;
2172
2173 /* If HW is not ready, prepare the conditions to check again */
2174 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2175 CSR_HW_IF_CONFIG_REG_PREPARE);
2176
2177 ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2178 ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2179 CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2180
2181 if (ret < 0)
2182 return ret;
2183
2184 /* HW should be ready by now, check again. */
2185 ret = iwl_set_hw_ready(priv);
2186 if (ret >= 0)
2187 return 0;
2188 return ret;
2189 }
2190
2191 #define MAX_HW_RESTARTS 5
2192
2193 static int __iwl_up(struct iwl_priv *priv)
2194 {
2195 struct iwl_rxon_context *ctx;
2196 int ret;
2197
2198 lockdep_assert_held(&priv->mutex);
2199
2200 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2201 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2202 return -EIO;
2203 }
2204
2205 for_each_context(priv, ctx) {
2206 ret = iwlagn_alloc_bcast_station(priv, ctx);
2207 if (ret) {
2208 iwl_dealloc_bcast_stations(priv);
2209 return ret;
2210 }
2211 }
2212
2213 ret = iwlagn_run_init_ucode(priv);
2214 if (ret) {
2215 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
2216 goto error;
2217 }
2218
2219 ret = iwlagn_load_ucode_wait_alive(priv,
2220 &priv->ucode_rt,
2221 IWL_UCODE_REGULAR);
2222 if (ret) {
2223 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
2224 goto error;
2225 }
2226
2227 ret = iwl_alive_start(priv);
2228 if (ret)
2229 goto error;
2230 return 0;
2231
2232 error:
2233 set_bit(STATUS_EXIT_PENDING, &priv->status);
2234 __iwl_down(priv);
2235 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2236
2237 IWL_ERR(priv, "Unable to initialize device.\n");
2238 return ret;
2239 }
2240
2241
2242 /*****************************************************************************
2243 *
2244 * Workqueue callbacks
2245 *
2246 *****************************************************************************/
2247
2248 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2249 {
2250 struct iwl_priv *priv = container_of(work, struct iwl_priv,
2251 run_time_calib_work);
2252
2253 mutex_lock(&priv->mutex);
2254
2255 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2256 test_bit(STATUS_SCANNING, &priv->status)) {
2257 mutex_unlock(&priv->mutex);
2258 return;
2259 }
2260
2261 if (priv->start_calib) {
2262 iwl_chain_noise_calibration(priv);
2263 iwl_sensitivity_calibration(priv);
2264 }
2265
2266 mutex_unlock(&priv->mutex);
2267 }
2268
2269 static void iwlagn_prepare_restart(struct iwl_priv *priv)
2270 {
2271 struct iwl_rxon_context *ctx;
2272 bool bt_full_concurrent;
2273 u8 bt_ci_compliance;
2274 u8 bt_load;
2275 u8 bt_status;
2276
2277 lockdep_assert_held(&priv->mutex);
2278
2279 for_each_context(priv, ctx)
2280 ctx->vif = NULL;
2281 priv->is_open = 0;
2282
2283 /*
2284 * __iwl_down() will clear the BT status variables,
2285 * which is correct, but when we restart we really
2286 * want to keep them so restore them afterwards.
2287 *
2288 * The restart process will later pick them up and
2289 * re-configure the hw when we reconfigure the BT
2290 * command.
2291 */
2292 bt_full_concurrent = priv->bt_full_concurrent;
2293 bt_ci_compliance = priv->bt_ci_compliance;
2294 bt_load = priv->bt_traffic_load;
2295 bt_status = priv->bt_status;
2296
2297 __iwl_down(priv);
2298
2299 priv->bt_full_concurrent = bt_full_concurrent;
2300 priv->bt_ci_compliance = bt_ci_compliance;
2301 priv->bt_traffic_load = bt_load;
2302 priv->bt_status = bt_status;
2303 }
2304
2305 static void iwl_bg_restart(struct work_struct *data)
2306 {
2307 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2308
2309 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2310 return;
2311
2312 if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2313 mutex_lock(&priv->mutex);
2314 iwlagn_prepare_restart(priv);
2315 mutex_unlock(&priv->mutex);
2316 iwl_cancel_deferred_work(priv);
2317 ieee80211_restart_hw(priv->hw);
2318 } else {
2319 WARN_ON(1);
2320 }
2321 }
2322
2323 static void iwl_bg_rx_replenish(struct work_struct *data)
2324 {
2325 struct iwl_priv *priv =
2326 container_of(data, struct iwl_priv, rx_replenish);
2327
2328 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2329 return;
2330
2331 mutex_lock(&priv->mutex);
2332 iwlagn_rx_replenish(priv);
2333 mutex_unlock(&priv->mutex);
2334 }
2335
2336 static int iwl_mac_offchannel_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
2337 struct ieee80211_channel *chan,
2338 enum nl80211_channel_type channel_type,
2339 unsigned int wait)
2340 {
2341 struct iwl_priv *priv = hw->priv;
2342 int ret;
2343
2344 /* Not supported if we don't have PAN */
2345 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) {
2346 ret = -EOPNOTSUPP;
2347 goto free;
2348 }
2349
2350 /* Not supported on pre-P2P firmware */
2351 if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
2352 BIT(NL80211_IFTYPE_P2P_CLIENT))) {
2353 ret = -EOPNOTSUPP;
2354 goto free;
2355 }
2356
2357 mutex_lock(&priv->mutex);
2358
2359 if (!priv->contexts[IWL_RXON_CTX_PAN].is_active) {
2360 /*
2361 * If the PAN context is free, use the normal
2362 * way of doing remain-on-channel offload + TX.
2363 */
2364 ret = 1;
2365 goto out;
2366 }
2367
2368 /* TODO: queue up if scanning? */
2369 if (test_bit(STATUS_SCANNING, &priv->status) ||
2370 priv->_agn.offchan_tx_skb) {
2371 ret = -EBUSY;
2372 goto out;
2373 }
2374
2375 /*
2376 * max_scan_ie_len doesn't include the blank SSID or the header,
2377 * so need to add that again here.
2378 */
2379 if (skb->len > hw->wiphy->max_scan_ie_len + 24 + 2) {
2380 ret = -ENOBUFS;
2381 goto out;
2382 }
2383
2384 priv->_agn.offchan_tx_skb = skb;
2385 priv->_agn.offchan_tx_timeout = wait;
2386 priv->_agn.offchan_tx_chan = chan;
2387
2388 ret = iwl_scan_initiate(priv, priv->contexts[IWL_RXON_CTX_PAN].vif,
2389 IWL_SCAN_OFFCH_TX, chan->band);
2390 if (ret)
2391 priv->_agn.offchan_tx_skb = NULL;
2392 out:
2393 mutex_unlock(&priv->mutex);
2394 free:
2395 if (ret < 0)
2396 kfree_skb(skb);
2397
2398 return ret;
2399 }
2400
2401 static int iwl_mac_offchannel_tx_cancel_wait(struct ieee80211_hw *hw)
2402 {
2403 struct iwl_priv *priv = hw->priv;
2404 int ret;
2405
2406 mutex_lock(&priv->mutex);
2407
2408 if (!priv->_agn.offchan_tx_skb) {
2409 ret = -EINVAL;
2410 goto unlock;
2411 }
2412
2413 priv->_agn.offchan_tx_skb = NULL;
2414
2415 ret = iwl_scan_cancel_timeout(priv, 200);
2416 if (ret)
2417 ret = -EIO;
2418 unlock:
2419 mutex_unlock(&priv->mutex);
2420
2421 return ret;
2422 }
2423
2424 /*****************************************************************************
2425 *
2426 * mac80211 entry point functions
2427 *
2428 *****************************************************************************/
2429
2430 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
2431 {
2432 .max = 1,
2433 .types = BIT(NL80211_IFTYPE_STATION),
2434 },
2435 {
2436 .max = 1,
2437 .types = BIT(NL80211_IFTYPE_AP),
2438 },
2439 };
2440
2441 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
2442 {
2443 .max = 2,
2444 .types = BIT(NL80211_IFTYPE_STATION),
2445 },
2446 };
2447
2448 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
2449 {
2450 .max = 1,
2451 .types = BIT(NL80211_IFTYPE_STATION),
2452 },
2453 {
2454 .max = 1,
2455 .types = BIT(NL80211_IFTYPE_P2P_GO) |
2456 BIT(NL80211_IFTYPE_AP),
2457 },
2458 };
2459
2460 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
2461 {
2462 .max = 2,
2463 .types = BIT(NL80211_IFTYPE_STATION),
2464 },
2465 {
2466 .max = 1,
2467 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
2468 },
2469 };
2470
2471 static const struct ieee80211_iface_combination
2472 iwlagn_iface_combinations_dualmode[] = {
2473 { .num_different_channels = 1,
2474 .max_interfaces = 2,
2475 .beacon_int_infra_match = true,
2476 .limits = iwlagn_sta_ap_limits,
2477 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
2478 },
2479 { .num_different_channels = 1,
2480 .max_interfaces = 2,
2481 .limits = iwlagn_2sta_limits,
2482 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
2483 },
2484 };
2485
2486 static const struct ieee80211_iface_combination
2487 iwlagn_iface_combinations_p2p[] = {
2488 { .num_different_channels = 1,
2489 .max_interfaces = 2,
2490 .beacon_int_infra_match = true,
2491 .limits = iwlagn_p2p_sta_go_limits,
2492 .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
2493 },
2494 { .num_different_channels = 1,
2495 .max_interfaces = 2,
2496 .limits = iwlagn_p2p_2sta_limits,
2497 .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
2498 },
2499 };
2500
2501 /*
2502 * Not a mac80211 entry point function, but it fits in with all the
2503 * other mac80211 functions grouped here.
2504 */
2505 static int iwl_mac_setup_register(struct iwl_priv *priv,
2506 struct iwlagn_ucode_capabilities *capa)
2507 {
2508 int ret;
2509 struct ieee80211_hw *hw = priv->hw;
2510 struct iwl_rxon_context *ctx;
2511
2512 hw->rate_control_algorithm = "iwl-agn-rs";
2513
2514 /* Tell mac80211 our characteristics */
2515 hw->flags = IEEE80211_HW_SIGNAL_DBM |
2516 IEEE80211_HW_AMPDU_AGGREGATION |
2517 IEEE80211_HW_NEED_DTIM_PERIOD |
2518 IEEE80211_HW_SPECTRUM_MGMT |
2519 IEEE80211_HW_REPORTS_TX_ACK_STATUS;
2520
2521 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2522
2523 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2524 IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2525
2526 if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
2527 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
2528 IEEE80211_HW_SUPPORTS_STATIC_SMPS;
2529
2530 if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
2531 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
2532
2533 hw->sta_data_size = sizeof(struct iwl_station_priv);
2534 hw->vif_data_size = sizeof(struct iwl_vif_priv);
2535
2536 for_each_context(priv, ctx) {
2537 hw->wiphy->interface_modes |= ctx->interface_modes;
2538 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
2539 }
2540
2541 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
2542
2543 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
2544 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
2545 hw->wiphy->n_iface_combinations =
2546 ARRAY_SIZE(iwlagn_iface_combinations_p2p);
2547 } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
2548 hw->wiphy->iface_combinations = iwlagn_iface_combinations_dualmode;
2549 hw->wiphy->n_iface_combinations =
2550 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
2551 }
2552
2553 hw->wiphy->max_remain_on_channel_duration = 1000;
2554
2555 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
2556 WIPHY_FLAG_DISABLE_BEACON_HINTS |
2557 WIPHY_FLAG_IBSS_RSN;
2558
2559 if (iwlagn_mod_params.power_save)
2560 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
2561 else
2562 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2563
2564 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
2565 /* we create the 802.11 header and a zero-length SSID element */
2566 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
2567
2568 /* Default value; 4 EDCA QOS priorities */
2569 hw->queues = 4;
2570
2571 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2572
2573 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2574 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2575 &priv->bands[IEEE80211_BAND_2GHZ];
2576 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2577 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2578 &priv->bands[IEEE80211_BAND_5GHZ];
2579
2580 iwl_leds_init(priv);
2581
2582 ret = ieee80211_register_hw(priv->hw);
2583 if (ret) {
2584 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2585 return ret;
2586 }
2587 priv->mac80211_registered = 1;
2588
2589 return 0;
2590 }
2591
2592
2593 static int iwlagn_mac_start(struct ieee80211_hw *hw)
2594 {
2595 struct iwl_priv *priv = hw->priv;
2596 int ret;
2597
2598 IWL_DEBUG_MAC80211(priv, "enter\n");
2599
2600 /* we should be verifying the device is ready to be opened */
2601 mutex_lock(&priv->mutex);
2602 ret = __iwl_up(priv);
2603 mutex_unlock(&priv->mutex);
2604 if (ret)
2605 return ret;
2606
2607 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2608
2609 /* Now we should be done, and the READY bit should be set. */
2610 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
2611 ret = -EIO;
2612
2613 iwlagn_led_enable(priv);
2614
2615 priv->is_open = 1;
2616 IWL_DEBUG_MAC80211(priv, "leave\n");
2617 return 0;
2618 }
2619
2620 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
2621 {
2622 struct iwl_priv *priv = hw->priv;
2623
2624 IWL_DEBUG_MAC80211(priv, "enter\n");
2625
2626 if (!priv->is_open)
2627 return;
2628
2629 priv->is_open = 0;
2630
2631 iwl_down(priv);
2632
2633 flush_workqueue(priv->workqueue);
2634
2635 /* User space software may expect getting rfkill changes
2636 * even if interface is down */
2637 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2638 iwl_enable_rfkill_int(priv);
2639
2640 IWL_DEBUG_MAC80211(priv, "leave\n");
2641 }
2642
2643 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2644 {
2645 struct iwl_priv *priv = hw->priv;
2646
2647 IWL_DEBUG_MACDUMP(priv, "enter\n");
2648
2649 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2650 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2651
2652 if (iwlagn_tx_skb(priv, skb))
2653 dev_kfree_skb_any(skb);
2654
2655 IWL_DEBUG_MACDUMP(priv, "leave\n");
2656 }
2657
2658 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
2659 struct ieee80211_vif *vif,
2660 struct ieee80211_key_conf *keyconf,
2661 struct ieee80211_sta *sta,
2662 u32 iv32, u16 *phase1key)
2663 {
2664 struct iwl_priv *priv = hw->priv;
2665 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2666
2667 IWL_DEBUG_MAC80211(priv, "enter\n");
2668
2669 iwl_update_tkip_key(priv, vif_priv->ctx, keyconf, sta,
2670 iv32, phase1key);
2671
2672 IWL_DEBUG_MAC80211(priv, "leave\n");
2673 }
2674
2675 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2676 struct ieee80211_vif *vif,
2677 struct ieee80211_sta *sta,
2678 struct ieee80211_key_conf *key)
2679 {
2680 struct iwl_priv *priv = hw->priv;
2681 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2682 struct iwl_rxon_context *ctx = vif_priv->ctx;
2683 int ret;
2684 u8 sta_id;
2685 bool is_default_wep_key = false;
2686
2687 IWL_DEBUG_MAC80211(priv, "enter\n");
2688
2689 if (iwlagn_mod_params.sw_crypto) {
2690 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2691 return -EOPNOTSUPP;
2692 }
2693
2694 /*
2695 * To support IBSS RSN, don't program group keys in IBSS, the
2696 * hardware will then not attempt to decrypt the frames.
2697 */
2698 if (vif->type == NL80211_IFTYPE_ADHOC &&
2699 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
2700 return -EOPNOTSUPP;
2701
2702 sta_id = iwl_sta_id_or_broadcast(priv, vif_priv->ctx, sta);
2703 if (sta_id == IWL_INVALID_STATION)
2704 return -EINVAL;
2705
2706 mutex_lock(&priv->mutex);
2707 iwl_scan_cancel_timeout(priv, 100);
2708
2709 /*
2710 * If we are getting WEP group key and we didn't receive any key mapping
2711 * so far, we are in legacy wep mode (group key only), otherwise we are
2712 * in 1X mode.
2713 * In legacy wep mode, we use another host command to the uCode.
2714 */
2715 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2716 key->cipher == WLAN_CIPHER_SUITE_WEP104) &&
2717 !sta) {
2718 if (cmd == SET_KEY)
2719 is_default_wep_key = !ctx->key_mapping_keys;
2720 else
2721 is_default_wep_key =
2722 (key->hw_key_idx == HW_KEY_DEFAULT);
2723 }
2724
2725 switch (cmd) {
2726 case SET_KEY:
2727 if (is_default_wep_key)
2728 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
2729 else
2730 ret = iwl_set_dynamic_key(priv, vif_priv->ctx,
2731 key, sta_id);
2732
2733 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2734 break;
2735 case DISABLE_KEY:
2736 if (is_default_wep_key)
2737 ret = iwl_remove_default_wep_key(priv, ctx, key);
2738 else
2739 ret = iwl_remove_dynamic_key(priv, ctx, key, sta_id);
2740
2741 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2742 break;
2743 default:
2744 ret = -EINVAL;
2745 }
2746
2747 mutex_unlock(&priv->mutex);
2748 IWL_DEBUG_MAC80211(priv, "leave\n");
2749
2750 return ret;
2751 }
2752
2753 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
2754 struct ieee80211_vif *vif,
2755 enum ieee80211_ampdu_mlme_action action,
2756 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
2757 u8 buf_size)
2758 {
2759 struct iwl_priv *priv = hw->priv;
2760 int ret = -EINVAL;
2761 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
2762
2763 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2764 sta->addr, tid);
2765
2766 if (!(priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE))
2767 return -EACCES;
2768
2769 mutex_lock(&priv->mutex);
2770
2771 switch (action) {
2772 case IEEE80211_AMPDU_RX_START:
2773 IWL_DEBUG_HT(priv, "start Rx\n");
2774 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
2775 break;
2776 case IEEE80211_AMPDU_RX_STOP:
2777 IWL_DEBUG_HT(priv, "stop Rx\n");
2778 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
2779 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2780 ret = 0;
2781 break;
2782 case IEEE80211_AMPDU_TX_START:
2783 IWL_DEBUG_HT(priv, "start Tx\n");
2784 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
2785 if (ret == 0) {
2786 priv->_agn.agg_tids_count++;
2787 IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2788 priv->_agn.agg_tids_count);
2789 }
2790 break;
2791 case IEEE80211_AMPDU_TX_STOP:
2792 IWL_DEBUG_HT(priv, "stop Tx\n");
2793 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
2794 if ((ret == 0) && (priv->_agn.agg_tids_count > 0)) {
2795 priv->_agn.agg_tids_count--;
2796 IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2797 priv->_agn.agg_tids_count);
2798 }
2799 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2800 ret = 0;
2801 if (priv->cfg->ht_params &&
2802 priv->cfg->ht_params->use_rts_for_aggregation) {
2803 /*
2804 * switch off RTS/CTS if it was previously enabled
2805 */
2806 sta_priv->lq_sta.lq.general_params.flags &=
2807 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2808 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2809 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2810 }
2811 break;
2812 case IEEE80211_AMPDU_TX_OPERATIONAL:
2813 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2814
2815 iwlagn_txq_agg_queue_setup(priv, sta, tid, buf_size);
2816
2817 /*
2818 * If the limit is 0, then it wasn't initialised yet,
2819 * use the default. We can do that since we take the
2820 * minimum below, and we don't want to go above our
2821 * default due to hardware restrictions.
2822 */
2823 if (sta_priv->max_agg_bufsize == 0)
2824 sta_priv->max_agg_bufsize =
2825 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2826
2827 /*
2828 * Even though in theory the peer could have different
2829 * aggregation reorder buffer sizes for different sessions,
2830 * our ucode doesn't allow for that and has a global limit
2831 * for each station. Therefore, use the minimum of all the
2832 * aggregation sessions and our default value.
2833 */
2834 sta_priv->max_agg_bufsize =
2835 min(sta_priv->max_agg_bufsize, buf_size);
2836
2837 if (priv->cfg->ht_params &&
2838 priv->cfg->ht_params->use_rts_for_aggregation) {
2839 /*
2840 * switch to RTS/CTS if it is the prefer protection
2841 * method for HT traffic
2842 */
2843
2844 sta_priv->lq_sta.lq.general_params.flags |=
2845 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2846 }
2847
2848 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
2849 sta_priv->max_agg_bufsize;
2850
2851 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2852 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2853
2854 IWL_INFO(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
2855 sta->addr, tid);
2856 ret = 0;
2857 break;
2858 }
2859 mutex_unlock(&priv->mutex);
2860
2861 return ret;
2862 }
2863
2864 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
2865 struct ieee80211_vif *vif,
2866 struct ieee80211_sta *sta)
2867 {
2868 struct iwl_priv *priv = hw->priv;
2869 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2870 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2871 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
2872 int ret;
2873 u8 sta_id;
2874
2875 IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
2876 sta->addr);
2877 mutex_lock(&priv->mutex);
2878 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
2879 sta->addr);
2880 sta_priv->common.sta_id = IWL_INVALID_STATION;
2881
2882 atomic_set(&sta_priv->pending_frames, 0);
2883 if (vif->type == NL80211_IFTYPE_AP)
2884 sta_priv->client = true;
2885
2886 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
2887 is_ap, sta, &sta_id);
2888 if (ret) {
2889 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
2890 sta->addr, ret);
2891 /* Should we return success if return code is EEXIST ? */
2892 mutex_unlock(&priv->mutex);
2893 return ret;
2894 }
2895
2896 sta_priv->common.sta_id = sta_id;
2897
2898 /* Initialize rate scaling */
2899 IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
2900 sta->addr);
2901 iwl_rs_rate_init(priv, sta, sta_id);
2902 mutex_unlock(&priv->mutex);
2903
2904 return 0;
2905 }
2906
2907 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
2908 struct ieee80211_channel_switch *ch_switch)
2909 {
2910 struct iwl_priv *priv = hw->priv;
2911 const struct iwl_channel_info *ch_info;
2912 struct ieee80211_conf *conf = &hw->conf;
2913 struct ieee80211_channel *channel = ch_switch->channel;
2914 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2915 /*
2916 * MULTI-FIXME
2917 * When we add support for multiple interfaces, we need to
2918 * revisit this. The channel switch command in the device
2919 * only affects the BSS context, but what does that really
2920 * mean? And what if we get a CSA on the second interface?
2921 * This needs a lot of work.
2922 */
2923 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2924 u16 ch;
2925
2926 IWL_DEBUG_MAC80211(priv, "enter\n");
2927
2928 mutex_lock(&priv->mutex);
2929
2930 if (iwl_is_rfkill(priv))
2931 goto out;
2932
2933 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2934 test_bit(STATUS_SCANNING, &priv->status) ||
2935 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
2936 goto out;
2937
2938 if (!iwl_is_associated_ctx(ctx))
2939 goto out;
2940
2941 if (!priv->cfg->ops->lib->set_channel_switch)
2942 goto out;
2943
2944 ch = channel->hw_value;
2945 if (le16_to_cpu(ctx->active.channel) == ch)
2946 goto out;
2947
2948 ch_info = iwl_get_channel_info(priv, channel->band, ch);
2949 if (!is_channel_valid(ch_info)) {
2950 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
2951 goto out;
2952 }
2953
2954 spin_lock_irq(&priv->lock);
2955
2956 priv->current_ht_config.smps = conf->smps_mode;
2957
2958 /* Configure HT40 channels */
2959 ctx->ht.enabled = conf_is_ht(conf);
2960 if (ctx->ht.enabled) {
2961 if (conf_is_ht40_minus(conf)) {
2962 ctx->ht.extension_chan_offset =
2963 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2964 ctx->ht.is_40mhz = true;
2965 } else if (conf_is_ht40_plus(conf)) {
2966 ctx->ht.extension_chan_offset =
2967 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2968 ctx->ht.is_40mhz = true;
2969 } else {
2970 ctx->ht.extension_chan_offset =
2971 IEEE80211_HT_PARAM_CHA_SEC_NONE;
2972 ctx->ht.is_40mhz = false;
2973 }
2974 } else
2975 ctx->ht.is_40mhz = false;
2976
2977 if ((le16_to_cpu(ctx->staging.channel) != ch))
2978 ctx->staging.flags = 0;
2979
2980 iwl_set_rxon_channel(priv, channel, ctx);
2981 iwl_set_rxon_ht(priv, ht_conf);
2982 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
2983
2984 spin_unlock_irq(&priv->lock);
2985
2986 iwl_set_rate(priv);
2987 /*
2988 * at this point, staging_rxon has the
2989 * configuration for channel switch
2990 */
2991 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
2992 priv->switch_channel = cpu_to_le16(ch);
2993 if (priv->cfg->ops->lib->set_channel_switch(priv, ch_switch)) {
2994 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
2995 priv->switch_channel = 0;
2996 ieee80211_chswitch_done(ctx->vif, false);
2997 }
2998
2999 out:
3000 mutex_unlock(&priv->mutex);
3001 IWL_DEBUG_MAC80211(priv, "leave\n");
3002 }
3003
3004 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
3005 unsigned int changed_flags,
3006 unsigned int *total_flags,
3007 u64 multicast)
3008 {
3009 struct iwl_priv *priv = hw->priv;
3010 __le32 filter_or = 0, filter_nand = 0;
3011 struct iwl_rxon_context *ctx;
3012
3013 #define CHK(test, flag) do { \
3014 if (*total_flags & (test)) \
3015 filter_or |= (flag); \
3016 else \
3017 filter_nand |= (flag); \
3018 } while (0)
3019
3020 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
3021 changed_flags, *total_flags);
3022
3023 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
3024 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
3025 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
3026 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3027
3028 #undef CHK
3029
3030 mutex_lock(&priv->mutex);
3031
3032 for_each_context(priv, ctx) {
3033 ctx->staging.filter_flags &= ~filter_nand;
3034 ctx->staging.filter_flags |= filter_or;
3035
3036 /*
3037 * Not committing directly because hardware can perform a scan,
3038 * but we'll eventually commit the filter flags change anyway.
3039 */
3040 }
3041
3042 mutex_unlock(&priv->mutex);
3043
3044 /*
3045 * Receiving all multicast frames is always enabled by the
3046 * default flags setup in iwl_connection_init_rx_config()
3047 * since we currently do not support programming multicast
3048 * filters into the device.
3049 */
3050 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
3051 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3052 }
3053
3054 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
3055 {
3056 struct iwl_priv *priv = hw->priv;
3057
3058 mutex_lock(&priv->mutex);
3059 IWL_DEBUG_MAC80211(priv, "enter\n");
3060
3061 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3062 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
3063 goto done;
3064 }
3065 if (iwl_is_rfkill(priv)) {
3066 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
3067 goto done;
3068 }
3069
3070 /*
3071 * mac80211 will not push any more frames for transmit
3072 * until the flush is completed
3073 */
3074 if (drop) {
3075 IWL_DEBUG_MAC80211(priv, "send flush command\n");
3076 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
3077 IWL_ERR(priv, "flush request fail\n");
3078 goto done;
3079 }
3080 }
3081 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
3082 iwlagn_wait_tx_queue_empty(priv);
3083 done:
3084 mutex_unlock(&priv->mutex);
3085 IWL_DEBUG_MAC80211(priv, "leave\n");
3086 }
3087
3088 static void iwlagn_disable_roc(struct iwl_priv *priv)
3089 {
3090 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
3091 struct ieee80211_channel *chan = ACCESS_ONCE(priv->hw->conf.channel);
3092
3093 lockdep_assert_held(&priv->mutex);
3094
3095 if (!ctx->is_active)
3096 return;
3097
3098 ctx->staging.dev_type = RXON_DEV_TYPE_2STA;
3099 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3100 iwl_set_rxon_channel(priv, chan, ctx);
3101 iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
3102
3103 priv->_agn.hw_roc_channel = NULL;
3104
3105 iwlagn_commit_rxon(priv, ctx);
3106
3107 ctx->is_active = false;
3108 }
3109
3110 static void iwlagn_bg_roc_done(struct work_struct *work)
3111 {
3112 struct iwl_priv *priv = container_of(work, struct iwl_priv,
3113 _agn.hw_roc_work.work);
3114
3115 mutex_lock(&priv->mutex);
3116 ieee80211_remain_on_channel_expired(priv->hw);
3117 iwlagn_disable_roc(priv);
3118 mutex_unlock(&priv->mutex);
3119 }
3120
3121 static int iwl_mac_remain_on_channel(struct ieee80211_hw *hw,
3122 struct ieee80211_channel *channel,
3123 enum nl80211_channel_type channel_type,
3124 int duration)
3125 {
3126 struct iwl_priv *priv = hw->priv;
3127 int err = 0;
3128
3129 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
3130 return -EOPNOTSUPP;
3131
3132 if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
3133 BIT(NL80211_IFTYPE_P2P_CLIENT)))
3134 return -EOPNOTSUPP;
3135
3136 mutex_lock(&priv->mutex);
3137
3138 if (priv->contexts[IWL_RXON_CTX_PAN].is_active ||
3139 test_bit(STATUS_SCAN_HW, &priv->status)) {
3140 err = -EBUSY;
3141 goto out;
3142 }
3143
3144 priv->contexts[IWL_RXON_CTX_PAN].is_active = true;
3145 priv->_agn.hw_roc_channel = channel;
3146 priv->_agn.hw_roc_chantype = channel_type;
3147 priv->_agn.hw_roc_duration = DIV_ROUND_UP(duration * 1000, 1024);
3148 iwlagn_commit_rxon(priv, &priv->contexts[IWL_RXON_CTX_PAN]);
3149 queue_delayed_work(priv->workqueue, &priv->_agn.hw_roc_work,
3150 msecs_to_jiffies(duration + 20));
3151
3152 msleep(IWL_MIN_SLOT_TIME); /* TU is almost ms */
3153 ieee80211_ready_on_channel(priv->hw);
3154
3155 out:
3156 mutex_unlock(&priv->mutex);
3157
3158 return err;
3159 }
3160
3161 static int iwl_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
3162 {
3163 struct iwl_priv *priv = hw->priv;
3164
3165 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
3166 return -EOPNOTSUPP;
3167
3168 cancel_delayed_work_sync(&priv->_agn.hw_roc_work);
3169
3170 mutex_lock(&priv->mutex);
3171 iwlagn_disable_roc(priv);
3172 mutex_unlock(&priv->mutex);
3173
3174 return 0;
3175 }
3176
3177 /*****************************************************************************
3178 *
3179 * driver setup and teardown
3180 *
3181 *****************************************************************************/
3182
3183 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3184 {
3185 priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3186
3187 init_waitqueue_head(&priv->wait_command_queue);
3188
3189 INIT_WORK(&priv->restart, iwl_bg_restart);
3190 INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3191 INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3192 INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3193 INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
3194 INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
3195 INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
3196 INIT_DELAYED_WORK(&priv->_agn.hw_roc_work, iwlagn_bg_roc_done);
3197
3198 iwl_setup_scan_deferred_work(priv);
3199
3200 if (priv->cfg->ops->lib->setup_deferred_work)
3201 priv->cfg->ops->lib->setup_deferred_work(priv);
3202
3203 init_timer(&priv->statistics_periodic);
3204 priv->statistics_periodic.data = (unsigned long)priv;
3205 priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3206
3207 init_timer(&priv->ucode_trace);
3208 priv->ucode_trace.data = (unsigned long)priv;
3209 priv->ucode_trace.function = iwl_bg_ucode_trace;
3210
3211 init_timer(&priv->watchdog);
3212 priv->watchdog.data = (unsigned long)priv;
3213 priv->watchdog.function = iwl_bg_watchdog;
3214
3215 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3216 iwl_irq_tasklet, (unsigned long)priv);
3217 }
3218
3219 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3220 {
3221 if (priv->cfg->ops->lib->cancel_deferred_work)
3222 priv->cfg->ops->lib->cancel_deferred_work(priv);
3223
3224 cancel_work_sync(&priv->run_time_calib_work);
3225 cancel_work_sync(&priv->beacon_update);
3226
3227 iwl_cancel_scan_deferred_work(priv);
3228
3229 cancel_work_sync(&priv->bt_full_concurrency);
3230 cancel_work_sync(&priv->bt_runtime_config);
3231
3232 del_timer_sync(&priv->statistics_periodic);
3233 del_timer_sync(&priv->ucode_trace);
3234 }
3235
3236 static void iwl_init_hw_rates(struct iwl_priv *priv,
3237 struct ieee80211_rate *rates)
3238 {
3239 int i;
3240
3241 for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
3242 rates[i].bitrate = iwl_rates[i].ieee * 5;
3243 rates[i].hw_value = i; /* Rate scaling will work on indexes */
3244 rates[i].hw_value_short = i;
3245 rates[i].flags = 0;
3246 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
3247 /*
3248 * If CCK != 1M then set short preamble rate flag.
3249 */
3250 rates[i].flags |=
3251 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
3252 0 : IEEE80211_RATE_SHORT_PREAMBLE;
3253 }
3254 }
3255 }
3256
3257 static int iwl_init_drv(struct iwl_priv *priv)
3258 {
3259 int ret;
3260
3261 spin_lock_init(&priv->sta_lock);
3262 spin_lock_init(&priv->hcmd_lock);
3263
3264 mutex_init(&priv->mutex);
3265
3266 priv->ieee_channels = NULL;
3267 priv->ieee_rates = NULL;
3268 priv->band = IEEE80211_BAND_2GHZ;
3269
3270 priv->iw_mode = NL80211_IFTYPE_STATION;
3271 priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
3272 priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3273 priv->_agn.agg_tids_count = 0;
3274
3275 /* initialize force reset */
3276 priv->force_reset[IWL_RF_RESET].reset_duration =
3277 IWL_DELAY_NEXT_FORCE_RF_RESET;
3278 priv->force_reset[IWL_FW_RESET].reset_duration =
3279 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
3280
3281 priv->rx_statistics_jiffies = jiffies;
3282
3283 /* Choose which receivers/antennas to use */
3284 iwlagn_set_rxon_chain(priv, &priv->contexts[IWL_RXON_CTX_BSS]);
3285
3286 iwl_init_scan_params(priv);
3287
3288 /* init bt coex */
3289 if (priv->cfg->bt_params &&
3290 priv->cfg->bt_params->advanced_bt_coexist) {
3291 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
3292 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
3293 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
3294 priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
3295 priv->bt_duration = BT_DURATION_LIMIT_DEF;
3296 priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
3297 }
3298
3299 ret = iwl_init_channel_map(priv);
3300 if (ret) {
3301 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3302 goto err;
3303 }
3304
3305 ret = iwlcore_init_geos(priv);
3306 if (ret) {
3307 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3308 goto err_free_channel_map;
3309 }
3310 iwl_init_hw_rates(priv, priv->ieee_rates);
3311
3312 return 0;
3313
3314 err_free_channel_map:
3315 iwl_free_channel_map(priv);
3316 err:
3317 return ret;
3318 }
3319
3320 static void iwl_uninit_drv(struct iwl_priv *priv)
3321 {
3322 iwl_calib_free_results(priv);
3323 iwlcore_free_geos(priv);
3324 iwl_free_channel_map(priv);
3325 kfree(priv->scan_cmd);
3326 kfree(priv->beacon_cmd);
3327 }
3328
3329 struct ieee80211_ops iwlagn_hw_ops = {
3330 .tx = iwlagn_mac_tx,
3331 .start = iwlagn_mac_start,
3332 .stop = iwlagn_mac_stop,
3333 .add_interface = iwl_mac_add_interface,
3334 .remove_interface = iwl_mac_remove_interface,
3335 .change_interface = iwl_mac_change_interface,
3336 .config = iwlagn_mac_config,
3337 .configure_filter = iwlagn_configure_filter,
3338 .set_key = iwlagn_mac_set_key,
3339 .update_tkip_key = iwlagn_mac_update_tkip_key,
3340 .conf_tx = iwl_mac_conf_tx,
3341 .bss_info_changed = iwlagn_bss_info_changed,
3342 .ampdu_action = iwlagn_mac_ampdu_action,
3343 .hw_scan = iwl_mac_hw_scan,
3344 .sta_notify = iwlagn_mac_sta_notify,
3345 .sta_add = iwlagn_mac_sta_add,
3346 .sta_remove = iwl_mac_sta_remove,
3347 .channel_switch = iwlagn_mac_channel_switch,
3348 .flush = iwlagn_mac_flush,
3349 .tx_last_beacon = iwl_mac_tx_last_beacon,
3350 .remain_on_channel = iwl_mac_remain_on_channel,
3351 .cancel_remain_on_channel = iwl_mac_cancel_remain_on_channel,
3352 .offchannel_tx = iwl_mac_offchannel_tx,
3353 .offchannel_tx_cancel_wait = iwl_mac_offchannel_tx_cancel_wait,
3354 CFG80211_TESTMODE_CMD(iwl_testmode_cmd)
3355 CFG80211_TESTMODE_DUMP(iwl_testmode_dump)
3356 };
3357
3358 static u32 iwl_hw_detect(struct iwl_priv *priv)
3359 {
3360 return iwl_read32(priv, CSR_HW_REV);
3361 }
3362
3363 static int iwl_set_hw_params(struct iwl_priv *priv)
3364 {
3365 priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
3366 priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
3367 if (iwlagn_mod_params.amsdu_size_8K)
3368 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
3369 else
3370 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
3371
3372 priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
3373
3374 if (iwlagn_mod_params.disable_11n)
3375 priv->cfg->sku &= ~EEPROM_SKU_CAP_11N_ENABLE;
3376
3377 /* Device-specific setup */
3378 return priv->cfg->ops->lib->set_hw_params(priv);
3379 }
3380
3381 static const u8 iwlagn_bss_ac_to_fifo[] = {
3382 IWL_TX_FIFO_VO,
3383 IWL_TX_FIFO_VI,
3384 IWL_TX_FIFO_BE,
3385 IWL_TX_FIFO_BK,
3386 };
3387
3388 static const u8 iwlagn_bss_ac_to_queue[] = {
3389 0, 1, 2, 3,
3390 };
3391
3392 static const u8 iwlagn_pan_ac_to_fifo[] = {
3393 IWL_TX_FIFO_VO_IPAN,
3394 IWL_TX_FIFO_VI_IPAN,
3395 IWL_TX_FIFO_BE_IPAN,
3396 IWL_TX_FIFO_BK_IPAN,
3397 };
3398
3399 static const u8 iwlagn_pan_ac_to_queue[] = {
3400 7, 6, 5, 4,
3401 };
3402
3403 /* This function both allocates and initializes hw and priv. */
3404 static struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg)
3405 {
3406 struct iwl_priv *priv;
3407 /* mac80211 allocates memory for this device instance, including
3408 * space for this driver's private structure */
3409 struct ieee80211_hw *hw;
3410
3411 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwlagn_hw_ops);
3412 if (hw == NULL) {
3413 pr_err("%s: Can not allocate network device\n",
3414 cfg->name);
3415 goto out;
3416 }
3417
3418 priv = hw->priv;
3419 priv->hw = hw;
3420
3421 out:
3422 return hw;
3423 }
3424
3425 static void iwl_init_context(struct iwl_priv *priv)
3426 {
3427 int i;
3428
3429 /*
3430 * The default context is always valid,
3431 * more may be discovered when firmware
3432 * is loaded.
3433 */
3434 priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
3435
3436 for (i = 0; i < NUM_IWL_RXON_CTX; i++)
3437 priv->contexts[i].ctxid = i;
3438
3439 priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
3440 priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
3441 priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
3442 priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
3443 priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
3444 priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
3445 priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
3446 priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
3447 priv->contexts[IWL_RXON_CTX_BSS].ac_to_fifo = iwlagn_bss_ac_to_fifo;
3448 priv->contexts[IWL_RXON_CTX_BSS].ac_to_queue = iwlagn_bss_ac_to_queue;
3449 priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
3450 BIT(NL80211_IFTYPE_ADHOC);
3451 priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
3452 BIT(NL80211_IFTYPE_STATION);
3453 priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
3454 priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
3455 priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
3456 priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
3457
3458 priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
3459 priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
3460 REPLY_WIPAN_RXON_TIMING;
3461 priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
3462 REPLY_WIPAN_RXON_ASSOC;
3463 priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
3464 priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
3465 priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
3466 priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
3467 priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
3468 priv->contexts[IWL_RXON_CTX_PAN].ac_to_fifo = iwlagn_pan_ac_to_fifo;
3469 priv->contexts[IWL_RXON_CTX_PAN].ac_to_queue = iwlagn_pan_ac_to_queue;
3470 priv->contexts[IWL_RXON_CTX_PAN].mcast_queue = IWL_IPAN_MCAST_QUEUE;
3471 priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
3472 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
3473 #ifdef CONFIG_IWL_P2P
3474 priv->contexts[IWL_RXON_CTX_PAN].interface_modes |=
3475 BIT(NL80211_IFTYPE_P2P_CLIENT) | BIT(NL80211_IFTYPE_P2P_GO);
3476 #endif
3477 priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
3478 priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
3479 priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
3480
3481 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
3482 }
3483
3484 int iwl_probe(void *bus_specific, struct iwl_bus_ops *bus_ops,
3485 struct iwl_cfg *cfg)
3486 {
3487 int err = 0;
3488 struct iwl_priv *priv;
3489 struct ieee80211_hw *hw;
3490 u16 num_mac;
3491 u32 hw_rev;
3492
3493 /************************
3494 * 1. Allocating HW data
3495 ************************/
3496 hw = iwl_alloc_all(cfg);
3497 if (!hw) {
3498 err = -ENOMEM;
3499 goto out;
3500 }
3501
3502 priv = hw->priv;
3503
3504 priv->bus.priv = priv;
3505 priv->bus.bus_specific = bus_specific;
3506 priv->bus.ops = bus_ops;
3507 priv->bus.irq = priv->bus.ops->get_irq(&priv->bus);
3508 priv->bus.ops->set_drv_data(&priv->bus, priv);
3509 priv->bus.dev = priv->bus.ops->get_dev(&priv->bus);
3510
3511 iwl_trans_register(&priv->trans);
3512
3513 /* At this point both hw and priv are allocated. */
3514
3515 SET_IEEE80211_DEV(hw, priv->bus.dev);
3516
3517 IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3518 priv->cfg = cfg;
3519 priv->inta_mask = CSR_INI_SET_MASK;
3520
3521 /* is antenna coupling more than 35dB ? */
3522 priv->bt_ant_couple_ok =
3523 (iwlagn_ant_coupling > IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
3524 true : false;
3525
3526 /* enable/disable bt channel inhibition */
3527 priv->bt_ch_announce = iwlagn_bt_ch_announce;
3528 IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
3529 (priv->bt_ch_announce) ? "On" : "Off");
3530
3531 if (iwl_alloc_traffic_mem(priv))
3532 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3533
3534
3535 /* these spin locks will be used in apm_ops.init and EEPROM access
3536 * we should init now
3537 */
3538 spin_lock_init(&priv->reg_lock);
3539 spin_lock_init(&priv->lock);
3540
3541 /*
3542 * stop and reset the on-board processor just in case it is in a
3543 * strange state ... like being left stranded by a primary kernel
3544 * and this is now the kdump kernel trying to start up
3545 */
3546 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3547
3548 /***********************
3549 * 3. Read REV register
3550 ***********************/
3551 hw_rev = iwl_hw_detect(priv);
3552 IWL_INFO(priv, "Detected %s, REV=0x%X\n",
3553 priv->cfg->name, hw_rev);
3554
3555 if (iwl_prepare_card_hw(priv)) {
3556 err = -EIO;
3557 IWL_WARN(priv, "Failed, HW not ready\n");
3558 goto out_free_traffic_mem;
3559 }
3560
3561 /*****************
3562 * 4. Read EEPROM
3563 *****************/
3564 /* Read the EEPROM */
3565 err = iwl_eeprom_init(priv, hw_rev);
3566 if (err) {
3567 IWL_ERR(priv, "Unable to init EEPROM\n");
3568 goto out_free_traffic_mem;
3569 }
3570 err = iwl_eeprom_check_version(priv);
3571 if (err)
3572 goto out_free_eeprom;
3573
3574 err = iwl_eeprom_check_sku(priv);
3575 if (err)
3576 goto out_free_eeprom;
3577
3578 /* extract MAC Address */
3579 iwl_eeprom_get_mac(priv, priv->addresses[0].addr);
3580 IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
3581 priv->hw->wiphy->addresses = priv->addresses;
3582 priv->hw->wiphy->n_addresses = 1;
3583 num_mac = iwl_eeprom_query16(priv, EEPROM_NUM_MAC_ADDRESS);
3584 if (num_mac > 1) {
3585 memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
3586 ETH_ALEN);
3587 priv->addresses[1].addr[5]++;
3588 priv->hw->wiphy->n_addresses++;
3589 }
3590
3591 /* initialize all valid contexts */
3592 iwl_init_context(priv);
3593
3594 /************************
3595 * 5. Setup HW constants
3596 ************************/
3597 if (iwl_set_hw_params(priv)) {
3598 err = -ENOENT;
3599 IWL_ERR(priv, "failed to set hw parameters\n");
3600 goto out_free_eeprom;
3601 }
3602
3603 /*******************
3604 * 6. Setup priv
3605 *******************/
3606
3607 err = iwl_init_drv(priv);
3608 if (err)
3609 goto out_free_eeprom;
3610 /* At this point both hw and priv are initialized. */
3611
3612 /********************
3613 * 7. Setup services
3614 ********************/
3615 iwl_alloc_isr_ict(priv);
3616
3617 err = request_irq(priv->bus.irq, iwl_isr_ict, IRQF_SHARED,
3618 DRV_NAME, priv);
3619 if (err) {
3620 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->bus.irq);
3621 goto out_uninit_drv;
3622 }
3623
3624 iwl_setup_deferred_work(priv);
3625 iwl_setup_rx_handlers(priv);
3626 iwl_testmode_init(priv);
3627
3628 /*********************************************
3629 * 8. Enable interrupts
3630 *********************************************/
3631
3632 iwl_enable_rfkill_int(priv);
3633
3634 /* If platform's RF_KILL switch is NOT set to KILL */
3635 if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3636 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3637 else
3638 set_bit(STATUS_RF_KILL_HW, &priv->status);
3639
3640 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3641 test_bit(STATUS_RF_KILL_HW, &priv->status));
3642
3643 iwl_power_initialize(priv);
3644 iwl_tt_initialize(priv);
3645
3646 init_completion(&priv->_agn.firmware_loading_complete);
3647
3648 err = iwl_request_firmware(priv, true);
3649 if (err)
3650 goto out_destroy_workqueue;
3651
3652 return 0;
3653
3654 out_destroy_workqueue:
3655 destroy_workqueue(priv->workqueue);
3656 priv->workqueue = NULL;
3657 free_irq(priv->bus.irq, priv);
3658 iwl_free_isr_ict(priv);
3659 out_uninit_drv:
3660 iwl_uninit_drv(priv);
3661 out_free_eeprom:
3662 iwl_eeprom_free(priv);
3663 out_free_traffic_mem:
3664 iwl_free_traffic_mem(priv);
3665 ieee80211_free_hw(priv->hw);
3666 out:
3667 return err;
3668 }
3669
3670 void __devexit iwl_remove(struct iwl_priv * priv)
3671 {
3672 unsigned long flags;
3673
3674 wait_for_completion(&priv->_agn.firmware_loading_complete);
3675
3676 IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3677
3678 iwl_dbgfs_unregister(priv);
3679 sysfs_remove_group(&priv->bus.dev->kobj,
3680 &iwl_attribute_group);
3681
3682 /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3683 * to be called and iwl_down since we are removing the device
3684 * we need to set STATUS_EXIT_PENDING bit.
3685 */
3686 set_bit(STATUS_EXIT_PENDING, &priv->status);
3687
3688 iwl_testmode_cleanup(priv);
3689 iwl_leds_exit(priv);
3690
3691 if (priv->mac80211_registered) {
3692 ieee80211_unregister_hw(priv->hw);
3693 priv->mac80211_registered = 0;
3694 }
3695
3696 /* Reset to low power before unloading driver. */
3697 iwl_apm_stop(priv);
3698
3699 iwl_tt_exit(priv);
3700
3701 /* make sure we flush any pending irq or
3702 * tasklet for the driver
3703 */
3704 spin_lock_irqsave(&priv->lock, flags);
3705 iwl_disable_interrupts(priv);
3706 spin_unlock_irqrestore(&priv->lock, flags);
3707
3708 iwl_synchronize_irq(priv);
3709
3710 iwl_dealloc_ucode(priv);
3711
3712 priv->trans.ops->rx_free(priv);
3713 priv->trans.ops->tx_free(priv);
3714
3715 iwl_eeprom_free(priv);
3716
3717
3718 /*netif_stop_queue(dev); */
3719 flush_workqueue(priv->workqueue);
3720
3721 /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3722 * priv->workqueue... so we can't take down the workqueue
3723 * until now... */
3724 destroy_workqueue(priv->workqueue);
3725 priv->workqueue = NULL;
3726 iwl_free_traffic_mem(priv);
3727
3728 free_irq(priv->bus.irq, priv);
3729 priv->bus.ops->set_drv_data(&priv->bus, NULL);
3730
3731 iwl_uninit_drv(priv);
3732
3733 iwl_free_isr_ict(priv);
3734
3735 dev_kfree_skb(priv->beacon_skb);
3736
3737 ieee80211_free_hw(priv->hw);
3738 }
3739
3740
3741 /*****************************************************************************
3742 *
3743 * driver and module entry point
3744 *
3745 *****************************************************************************/
3746 static int __init iwl_init(void)
3747 {
3748
3749 int ret;
3750 pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3751 pr_info(DRV_COPYRIGHT "\n");
3752
3753 ret = iwlagn_rate_control_register();
3754 if (ret) {
3755 pr_err("Unable to register rate control algorithm: %d\n", ret);
3756 return ret;
3757 }
3758
3759 ret = iwl_pci_register_driver();
3760
3761 if (ret)
3762 goto error_register;
3763 return ret;
3764
3765 error_register:
3766 iwlagn_rate_control_unregister();
3767 return ret;
3768 }
3769
3770 static void __exit iwl_exit(void)
3771 {
3772 iwl_pci_unregister_driver();
3773 iwlagn_rate_control_unregister();
3774 }
3775
3776 module_exit(iwl_exit);
3777 module_init(iwl_init);
3778
3779 #ifdef CONFIG_IWLWIFI_DEBUG
3780 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3781 MODULE_PARM_DESC(debug, "debug output mask");
3782 #endif
3783
3784 module_param_named(swcrypto, iwlagn_mod_params.sw_crypto, int, S_IRUGO);
3785 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
3786 module_param_named(queues_num, iwlagn_mod_params.num_of_queues, int, S_IRUGO);
3787 MODULE_PARM_DESC(queues_num, "number of hw queues.");
3788 module_param_named(11n_disable, iwlagn_mod_params.disable_11n, int, S_IRUGO);
3789 MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
3790 module_param_named(amsdu_size_8K, iwlagn_mod_params.amsdu_size_8K,
3791 int, S_IRUGO);
3792 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
3793 module_param_named(fw_restart, iwlagn_mod_params.restart_fw, int, S_IRUGO);
3794 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
3795
3796 module_param_named(ucode_alternative, iwlagn_wanted_ucode_alternative, int,
3797 S_IRUGO);
3798 MODULE_PARM_DESC(ucode_alternative,
3799 "specify ucode alternative to use from ucode file");
3800
3801 module_param_named(antenna_coupling, iwlagn_ant_coupling, int, S_IRUGO);
3802 MODULE_PARM_DESC(antenna_coupling,
3803 "specify antenna coupling in dB (defualt: 0 dB)");
3804
3805 module_param_named(bt_ch_inhibition, iwlagn_bt_ch_announce, bool, S_IRUGO);
3806 MODULE_PARM_DESC(bt_ch_inhibition,
3807 "Disable BT channel inhibition (default: enable)");
3808
3809 module_param_named(plcp_check, iwlagn_mod_params.plcp_check, bool, S_IRUGO);
3810 MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");
3811
3812 module_param_named(ack_check, iwlagn_mod_params.ack_check, bool, S_IRUGO);
3813 MODULE_PARM_DESC(ack_check, "Check ack health (default: 0 [disabled])");
3814
3815 module_param_named(wd_disable, iwlagn_mod_params.wd_disable, bool, S_IRUGO);
3816 MODULE_PARM_DESC(wd_disable,
3817 "Disable stuck queue watchdog timer (default: 0 [enabled])");
3818
3819 /*
3820 * set bt_coex_active to true, uCode will do kill/defer
3821 * every time the priority line is asserted (BT is sending signals on the
3822 * priority line in the PCIx).
3823 * set bt_coex_active to false, uCode will ignore the BT activity and
3824 * perform the normal operation
3825 *
3826 * User might experience transmit issue on some platform due to WiFi/BT
3827 * co-exist problem. The possible behaviors are:
3828 * Able to scan and finding all the available AP
3829 * Not able to associate with any AP
3830 * On those platforms, WiFi communication can be restored by set
3831 * "bt_coex_active" module parameter to "false"
3832 *
3833 * default: bt_coex_active = true (BT_COEX_ENABLE)
3834 */
3835 module_param_named(bt_coex_active, iwlagn_mod_params.bt_coex_active,
3836 bool, S_IRUGO);
3837 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bt co-exist (default: enable)");
3838
3839 module_param_named(led_mode, iwlagn_mod_params.led_mode, int, S_IRUGO);
3840 MODULE_PARM_DESC(led_mode, "0=system default, "
3841 "1=On(RF On)/Off(RF Off), 2=blinking (default: 0)");
3842
3843 module_param_named(power_save, iwlagn_mod_params.power_save,
3844 bool, S_IRUGO);
3845 MODULE_PARM_DESC(power_save,
3846 "enable WiFi power management (default: disable)");
3847
3848 module_param_named(power_level, iwlagn_mod_params.power_level,
3849 int, S_IRUGO);
3850 MODULE_PARM_DESC(power_level,
3851 "default power save level (range from 1 - 5, default: 1)");
3852
3853 /*
3854 * For now, keep using power level 1 instead of automatically
3855 * adjusting ...
3856 */
3857 module_param_named(no_sleep_autoadjust, iwlagn_mod_params.no_sleep_autoadjust,
3858 bool, S_IRUGO);
3859 MODULE_PARM_DESC(no_sleep_autoadjust,
3860 "don't automatically adjust sleep level "
3861 "according to maximum network latency (default: true)");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree