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iwlagn: provide heplers to access the transport ops
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-agn.c
blob3a4fca14fef8063b636985d5cdf480407e7978b1
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 .flags = CMD_SYNC,
133 };
134 struct ieee80211_tx_info *info;
135 u32 frame_size;
136 u32 rate_flags;
137 u32 rate;
138
139 /*
140 * We have to set up the TX command, the TX Beacon command, and the
141 * beacon contents.
142 */
143
144 lockdep_assert_held(&priv->mutex);
145
146 if (!priv->beacon_ctx) {
147 IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
148 return 0;
149 }
150
151 if (WARN_ON(!priv->beacon_skb))
152 return -EINVAL;
153
154 /* Allocate beacon command */
155 if (!priv->beacon_cmd)
156 priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
157 tx_beacon_cmd = priv->beacon_cmd;
158 if (!tx_beacon_cmd)
159 return -ENOMEM;
160
161 frame_size = priv->beacon_skb->len;
162
163 /* Set up TX command fields */
164 tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
165 tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
166 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
167 tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
168 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
169
170 /* Set up TX beacon command fields */
171 iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
172 frame_size);
173
174 /* Set up packet rate and flags */
175 info = IEEE80211_SKB_CB(priv->beacon_skb);
176
177 /*
178 * Let's set up the rate at least somewhat correctly;
179 * it will currently not actually be used by the uCode,
180 * it uses the broadcast station's rate instead.
181 */
182 if (info->control.rates[0].idx < 0 ||
183 info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
184 rate = 0;
185 else
186 rate = info->control.rates[0].idx;
187
188 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
189 priv->hw_params.valid_tx_ant);
190 rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
191
192 /* In mac80211, rates for 5 GHz start at 0 */
193 if (info->band == IEEE80211_BAND_5GHZ)
194 rate += IWL_FIRST_OFDM_RATE;
195 else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
196 rate_flags |= RATE_MCS_CCK_MSK;
197
198 tx_beacon_cmd->tx.rate_n_flags =
199 iwl_hw_set_rate_n_flags(rate, rate_flags);
200
201 /* Submit command */
202 cmd.len[0] = sizeof(*tx_beacon_cmd);
203 cmd.data[0] = tx_beacon_cmd;
204 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
205 cmd.len[1] = frame_size;
206 cmd.data[1] = priv->beacon_skb->data;
207 cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
208
209 return trans_send_cmd(priv, &cmd);
210 }
211
212 static void iwl_bg_beacon_update(struct work_struct *work)
213 {
214 struct iwl_priv *priv =
215 container_of(work, struct iwl_priv, beacon_update);
216 struct sk_buff *beacon;
217
218 mutex_lock(&priv->mutex);
219 if (!priv->beacon_ctx) {
220 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
221 goto out;
222 }
223
224 if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
225 /*
226 * The ucode will send beacon notifications even in
227 * IBSS mode, but we don't want to process them. But
228 * we need to defer the type check to here due to
229 * requiring locking around the beacon_ctx access.
230 */
231 goto out;
232 }
233
234 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
235 beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
236 if (!beacon) {
237 IWL_ERR(priv, "update beacon failed -- keeping old\n");
238 goto out;
239 }
240
241 /* new beacon skb is allocated every time; dispose previous.*/
242 dev_kfree_skb(priv->beacon_skb);
243
244 priv->beacon_skb = beacon;
245
246 iwlagn_send_beacon_cmd(priv);
247 out:
248 mutex_unlock(&priv->mutex);
249 }
250
251 static void iwl_bg_bt_runtime_config(struct work_struct *work)
252 {
253 struct iwl_priv *priv =
254 container_of(work, struct iwl_priv, bt_runtime_config);
255
256 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
257 return;
258
259 /* dont send host command if rf-kill is on */
260 if (!iwl_is_ready_rf(priv))
261 return;
262 iwlagn_send_advance_bt_config(priv);
263 }
264
265 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
266 {
267 struct iwl_priv *priv =
268 container_of(work, struct iwl_priv, bt_full_concurrency);
269 struct iwl_rxon_context *ctx;
270
271 mutex_lock(&priv->mutex);
272
273 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
274 goto out;
275
276 /* dont send host command if rf-kill is on */
277 if (!iwl_is_ready_rf(priv))
278 goto out;
279
280 IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
281 priv->bt_full_concurrent ?
282 "full concurrency" : "3-wire");
283
284 /*
285 * LQ & RXON updated cmds must be sent before BT Config cmd
286 * to avoid 3-wire collisions
287 */
288 for_each_context(priv, ctx) {
289 iwlagn_set_rxon_chain(priv, ctx);
290 iwlagn_commit_rxon(priv, ctx);
291 }
292
293 iwlagn_send_advance_bt_config(priv);
294 out:
295 mutex_unlock(&priv->mutex);
296 }
297
298 /**
299 * iwl_bg_statistics_periodic - Timer callback to queue statistics
300 *
301 * This callback is provided in order to send a statistics request.
302 *
303 * This timer function is continually reset to execute within
304 * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
305 * was received. We need to ensure we receive the statistics in order
306 * to update the temperature used for calibrating the TXPOWER.
307 */
308 static void iwl_bg_statistics_periodic(unsigned long data)
309 {
310 struct iwl_priv *priv = (struct iwl_priv *)data;
311
312 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
313 return;
314
315 /* dont send host command if rf-kill is on */
316 if (!iwl_is_ready_rf(priv))
317 return;
318
319 iwl_send_statistics_request(priv, CMD_ASYNC, false);
320 }
321
322
323 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
324 u32 start_idx, u32 num_events,
325 u32 mode)
326 {
327 u32 i;
328 u32 ptr; /* SRAM byte address of log data */
329 u32 ev, time, data; /* event log data */
330 unsigned long reg_flags;
331
332 if (mode == 0)
333 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
334 else
335 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
336
337 /* Make sure device is powered up for SRAM reads */
338 spin_lock_irqsave(&priv->reg_lock, reg_flags);
339 if (iwl_grab_nic_access(priv)) {
340 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
341 return;
342 }
343
344 /* Set starting address; reads will auto-increment */
345 iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
346 rmb();
347
348 /*
349 * "time" is actually "data" for mode 0 (no timestamp).
350 * place event id # at far right for easier visual parsing.
351 */
352 for (i = 0; i < num_events; i++) {
353 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
354 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
355 if (mode == 0) {
356 trace_iwlwifi_dev_ucode_cont_event(priv,
357 0, time, ev);
358 } else {
359 data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
360 trace_iwlwifi_dev_ucode_cont_event(priv,
361 time, data, ev);
362 }
363 }
364 /* Allow device to power down */
365 iwl_release_nic_access(priv);
366 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
367 }
368
369 static void iwl_continuous_event_trace(struct iwl_priv *priv)
370 {
371 u32 capacity; /* event log capacity in # entries */
372 u32 base; /* SRAM byte address of event log header */
373 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
374 u32 num_wraps; /* # times uCode wrapped to top of log */
375 u32 next_entry; /* index of next entry to be written by uCode */
376
377 base = priv->device_pointers.error_event_table;
378 if (priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
379 capacity = iwl_read_targ_mem(priv, base);
380 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
381 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
382 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
383 } else
384 return;
385
386 if (num_wraps == priv->event_log.num_wraps) {
387 iwl_print_cont_event_trace(priv,
388 base, priv->event_log.next_entry,
389 next_entry - priv->event_log.next_entry,
390 mode);
391 priv->event_log.non_wraps_count++;
392 } else {
393 if ((num_wraps - priv->event_log.num_wraps) > 1)
394 priv->event_log.wraps_more_count++;
395 else
396 priv->event_log.wraps_once_count++;
397 trace_iwlwifi_dev_ucode_wrap_event(priv,
398 num_wraps - priv->event_log.num_wraps,
399 next_entry, priv->event_log.next_entry);
400 if (next_entry < priv->event_log.next_entry) {
401 iwl_print_cont_event_trace(priv, base,
402 priv->event_log.next_entry,
403 capacity - priv->event_log.next_entry,
404 mode);
405
406 iwl_print_cont_event_trace(priv, base, 0,
407 next_entry, mode);
408 } else {
409 iwl_print_cont_event_trace(priv, base,
410 next_entry, capacity - next_entry,
411 mode);
412
413 iwl_print_cont_event_trace(priv, base, 0,
414 next_entry, mode);
415 }
416 }
417 priv->event_log.num_wraps = num_wraps;
418 priv->event_log.next_entry = next_entry;
419 }
420
421 /**
422 * iwl_bg_ucode_trace - Timer callback to log ucode event
423 *
424 * The timer is continually set to execute every
425 * UCODE_TRACE_PERIOD milliseconds after the last timer expired
426 * this function is to perform continuous uCode event logging operation
427 * if enabled
428 */
429 static void iwl_bg_ucode_trace(unsigned long data)
430 {
431 struct iwl_priv *priv = (struct iwl_priv *)data;
432
433 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
434 return;
435
436 if (priv->event_log.ucode_trace) {
437 iwl_continuous_event_trace(priv);
438 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
439 mod_timer(&priv->ucode_trace,
440 jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
441 }
442 }
443
444 static void iwl_bg_tx_flush(struct work_struct *work)
445 {
446 struct iwl_priv *priv =
447 container_of(work, struct iwl_priv, tx_flush);
448
449 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
450 return;
451
452 /* do nothing if rf-kill is on */
453 if (!iwl_is_ready_rf(priv))
454 return;
455
456 IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
457 iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
458 }
459
460 /**
461 * iwl_rx_handle - Main entry function for receiving responses from uCode
462 *
463 * Uses the priv->rx_handlers callback function array to invoke
464 * the appropriate handlers, including command responses,
465 * frame-received notifications, and other notifications.
466 */
467 static void iwl_rx_handle(struct iwl_priv *priv)
468 {
469 struct iwl_rx_mem_buffer *rxb;
470 struct iwl_rx_packet *pkt;
471 struct iwl_rx_queue *rxq = &priv->rxq;
472 u32 r, i;
473 int reclaim;
474 unsigned long flags;
475 u8 fill_rx = 0;
476 u32 count = 8;
477 int total_empty;
478
479 /* uCode's read index (stored in shared DRAM) indicates the last Rx
480 * buffer that the driver may process (last buffer filled by ucode). */
481 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
482 i = rxq->read;
483
484 /* Rx interrupt, but nothing sent from uCode */
485 if (i == r)
486 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
487
488 /* calculate total frames need to be restock after handling RX */
489 total_empty = r - rxq->write_actual;
490 if (total_empty < 0)
491 total_empty += RX_QUEUE_SIZE;
492
493 if (total_empty > (RX_QUEUE_SIZE / 2))
494 fill_rx = 1;
495
496 while (i != r) {
497 int len;
498
499 rxb = rxq->queue[i];
500
501 /* If an RXB doesn't have a Rx queue slot associated with it,
502 * then a bug has been introduced in the queue refilling
503 * routines -- catch it here */
504 if (WARN_ON(rxb == NULL)) {
505 i = (i + 1) & RX_QUEUE_MASK;
506 continue;
507 }
508
509 rxq->queue[i] = NULL;
510
511 dma_unmap_page(priv->bus.dev, rxb->page_dma,
512 PAGE_SIZE << priv->hw_params.rx_page_order,
513 DMA_FROM_DEVICE);
514 pkt = rxb_addr(rxb);
515
516 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
517 len += sizeof(u32); /* account for status word */
518 trace_iwlwifi_dev_rx(priv, pkt, len);
519
520 /* Reclaim a command buffer only if this packet is a response
521 * to a (driver-originated) command.
522 * If the packet (e.g. Rx frame) originated from uCode,
523 * there is no command buffer to reclaim.
524 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
525 * but apparently a few don't get set; catch them here. */
526 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
527 (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
528 (pkt->hdr.cmd != REPLY_RX) &&
529 (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
530 (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
531 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
532 (pkt->hdr.cmd != REPLY_TX);
533
534 /*
535 * Do the notification wait before RX handlers so
536 * even if the RX handler consumes the RXB we have
537 * access to it in the notification wait entry.
538 */
539 if (!list_empty(&priv->_agn.notif_waits)) {
540 struct iwl_notification_wait *w;
541
542 spin_lock(&priv->_agn.notif_wait_lock);
543 list_for_each_entry(w, &priv->_agn.notif_waits, list) {
544 if (w->cmd == pkt->hdr.cmd) {
545 w->triggered = true;
546 if (w->fn)
547 w->fn(priv, pkt, w->fn_data);
548 }
549 }
550 spin_unlock(&priv->_agn.notif_wait_lock);
551
552 wake_up_all(&priv->_agn.notif_waitq);
553 }
554 if (priv->pre_rx_handler)
555 priv->pre_rx_handler(priv, rxb);
556
557 /* Based on type of command response or notification,
558 * handle those that need handling via function in
559 * rx_handlers table. See iwl_setup_rx_handlers() */
560 if (priv->rx_handlers[pkt->hdr.cmd]) {
561 IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
562 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
563 priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
564 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
565 } else {
566 /* No handling needed */
567 IWL_DEBUG_RX(priv,
568 "r %d i %d No handler needed for %s, 0x%02x\n",
569 r, i, get_cmd_string(pkt->hdr.cmd),
570 pkt->hdr.cmd);
571 }
572
573 /*
574 * XXX: After here, we should always check rxb->page
575 * against NULL before touching it or its virtual
576 * memory (pkt). Because some rx_handler might have
577 * already taken or freed the pages.
578 */
579
580 if (reclaim) {
581 /* Invoke any callbacks, transfer the buffer to caller,
582 * and fire off the (possibly) blocking
583 * trans_send_cmd()
584 * as we reclaim the driver command queue */
585 if (rxb->page)
586 iwl_tx_cmd_complete(priv, rxb);
587 else
588 IWL_WARN(priv, "Claim null rxb?\n");
589 }
590
591 /* Reuse the page if possible. For notification packets and
592 * SKBs that fail to Rx correctly, add them back into the
593 * rx_free list for reuse later. */
594 spin_lock_irqsave(&rxq->lock, flags);
595 if (rxb->page != NULL) {
596 rxb->page_dma = dma_map_page(priv->bus.dev, rxb->page,
597 0, PAGE_SIZE << priv->hw_params.rx_page_order,
598 DMA_FROM_DEVICE);
599 list_add_tail(&rxb->list, &rxq->rx_free);
600 rxq->free_count++;
601 } else
602 list_add_tail(&rxb->list, &rxq->rx_used);
603
604 spin_unlock_irqrestore(&rxq->lock, flags);
605
606 i = (i + 1) & RX_QUEUE_MASK;
607 /* If there are a lot of unused frames,
608 * restock the Rx queue so ucode wont assert. */
609 if (fill_rx) {
610 count++;
611 if (count >= 8) {
612 rxq->read = i;
613 iwlagn_rx_replenish_now(priv);
614 count = 0;
615 }
616 }
617 }
618
619 /* Backtrack one entry */
620 rxq->read = i;
621 if (fill_rx)
622 iwlagn_rx_replenish_now(priv);
623 else
624 iwlagn_rx_queue_restock(priv);
625 }
626
627 /* tasklet for iwlagn interrupt */
628 static void iwl_irq_tasklet(struct iwl_priv *priv)
629 {
630 u32 inta = 0;
631 u32 handled = 0;
632 unsigned long flags;
633 u32 i;
634 #ifdef CONFIG_IWLWIFI_DEBUG
635 u32 inta_mask;
636 #endif
637
638 spin_lock_irqsave(&priv->lock, flags);
639
640 /* Ack/clear/reset pending uCode interrupts.
641 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
642 */
643 /* There is a hardware bug in the interrupt mask function that some
644 * interrupts (i.e. CSR_INT_BIT_SCD) can still be generated even if
645 * they are disabled in the CSR_INT_MASK register. Furthermore the
646 * ICT interrupt handling mechanism has another bug that might cause
647 * these unmasked interrupts fail to be detected. We workaround the
648 * hardware bugs here by ACKing all the possible interrupts so that
649 * interrupt coalescing can still be achieved.
650 */
651 iwl_write32(priv, CSR_INT, priv->_agn.inta | ~priv->inta_mask);
652
653 inta = priv->_agn.inta;
654
655 #ifdef CONFIG_IWLWIFI_DEBUG
656 if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
657 /* just for debug */
658 inta_mask = iwl_read32(priv, CSR_INT_MASK);
659 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
660 inta, inta_mask);
661 }
662 #endif
663
664 spin_unlock_irqrestore(&priv->lock, flags);
665
666 /* saved interrupt in inta variable now we can reset priv->_agn.inta */
667 priv->_agn.inta = 0;
668
669 /* Now service all interrupt bits discovered above. */
670 if (inta & CSR_INT_BIT_HW_ERR) {
671 IWL_ERR(priv, "Hardware error detected. Restarting.\n");
672
673 /* Tell the device to stop sending interrupts */
674 iwl_disable_interrupts(priv);
675
676 priv->isr_stats.hw++;
677 iwl_irq_handle_error(priv);
678
679 handled |= CSR_INT_BIT_HW_ERR;
680
681 return;
682 }
683
684 #ifdef CONFIG_IWLWIFI_DEBUG
685 if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
686 /* NIC fires this, but we don't use it, redundant with WAKEUP */
687 if (inta & CSR_INT_BIT_SCD) {
688 IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
689 "the frame/frames.\n");
690 priv->isr_stats.sch++;
691 }
692
693 /* Alive notification via Rx interrupt will do the real work */
694 if (inta & CSR_INT_BIT_ALIVE) {
695 IWL_DEBUG_ISR(priv, "Alive interrupt\n");
696 priv->isr_stats.alive++;
697 }
698 }
699 #endif
700 /* Safely ignore these bits for debug checks below */
701 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
702
703 /* HW RF KILL switch toggled */
704 if (inta & CSR_INT_BIT_RF_KILL) {
705 int hw_rf_kill = 0;
706 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
707 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
708 hw_rf_kill = 1;
709
710 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
711 hw_rf_kill ? "disable radio" : "enable radio");
712
713 priv->isr_stats.rfkill++;
714
715 /* driver only loads ucode once setting the interface up.
716 * the driver allows loading the ucode even if the radio
717 * is killed. Hence update the killswitch state here. The
718 * rfkill handler will care about restarting if needed.
719 */
720 if (!test_bit(STATUS_ALIVE, &priv->status)) {
721 if (hw_rf_kill)
722 set_bit(STATUS_RF_KILL_HW, &priv->status);
723 else
724 clear_bit(STATUS_RF_KILL_HW, &priv->status);
725 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
726 }
727
728 handled |= CSR_INT_BIT_RF_KILL;
729 }
730
731 /* Chip got too hot and stopped itself */
732 if (inta & CSR_INT_BIT_CT_KILL) {
733 IWL_ERR(priv, "Microcode CT kill error detected.\n");
734 priv->isr_stats.ctkill++;
735 handled |= CSR_INT_BIT_CT_KILL;
736 }
737
738 /* Error detected by uCode */
739 if (inta & CSR_INT_BIT_SW_ERR) {
740 IWL_ERR(priv, "Microcode SW error detected. "
741 " Restarting 0x%X.\n", inta);
742 priv->isr_stats.sw++;
743 iwl_irq_handle_error(priv);
744 handled |= CSR_INT_BIT_SW_ERR;
745 }
746
747 /* uCode wakes up after power-down sleep */
748 if (inta & CSR_INT_BIT_WAKEUP) {
749 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
750 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
751 for (i = 0; i < priv->hw_params.max_txq_num; i++)
752 iwl_txq_update_write_ptr(priv, &priv->txq[i]);
753
754 priv->isr_stats.wakeup++;
755
756 handled |= CSR_INT_BIT_WAKEUP;
757 }
758
759 /* All uCode command responses, including Tx command responses,
760 * Rx "responses" (frame-received notification), and other
761 * notifications from uCode come through here*/
762 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
763 CSR_INT_BIT_RX_PERIODIC)) {
764 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
765 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
766 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
767 iwl_write32(priv, CSR_FH_INT_STATUS,
768 CSR_FH_INT_RX_MASK);
769 }
770 if (inta & CSR_INT_BIT_RX_PERIODIC) {
771 handled |= CSR_INT_BIT_RX_PERIODIC;
772 iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
773 }
774 /* Sending RX interrupt require many steps to be done in the
775 * the device:
776 * 1- write interrupt to current index in ICT table.
777 * 2- dma RX frame.
778 * 3- update RX shared data to indicate last write index.
779 * 4- send interrupt.
780 * This could lead to RX race, driver could receive RX interrupt
781 * but the shared data changes does not reflect this;
782 * periodic interrupt will detect any dangling Rx activity.
783 */
784
785 /* Disable periodic interrupt; we use it as just a one-shot. */
786 iwl_write8(priv, CSR_INT_PERIODIC_REG,
787 CSR_INT_PERIODIC_DIS);
788 iwl_rx_handle(priv);
789
790 /*
791 * Enable periodic interrupt in 8 msec only if we received
792 * real RX interrupt (instead of just periodic int), to catch
793 * any dangling Rx interrupt. If it was just the periodic
794 * interrupt, there was no dangling Rx activity, and no need
795 * to extend the periodic interrupt; one-shot is enough.
796 */
797 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
798 iwl_write8(priv, CSR_INT_PERIODIC_REG,
799 CSR_INT_PERIODIC_ENA);
800
801 priv->isr_stats.rx++;
802 }
803
804 /* This "Tx" DMA channel is used only for loading uCode */
805 if (inta & CSR_INT_BIT_FH_TX) {
806 iwl_write32(priv, CSR_FH_INT_STATUS, CSR_FH_INT_TX_MASK);
807 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
808 priv->isr_stats.tx++;
809 handled |= CSR_INT_BIT_FH_TX;
810 /* Wake up uCode load routine, now that load is complete */
811 priv->ucode_write_complete = 1;
812 wake_up_interruptible(&priv->wait_command_queue);
813 }
814
815 if (inta & ~handled) {
816 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
817 priv->isr_stats.unhandled++;
818 }
819
820 if (inta & ~(priv->inta_mask)) {
821 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
822 inta & ~priv->inta_mask);
823 }
824
825 /* Re-enable all interrupts */
826 /* only Re-enable if disabled by irq */
827 if (test_bit(STATUS_INT_ENABLED, &priv->status))
828 iwl_enable_interrupts(priv);
829 /* Re-enable RF_KILL if it occurred */
830 else if (handled & CSR_INT_BIT_RF_KILL)
831 iwl_enable_rfkill_int(priv);
832 }
833
834 /*****************************************************************************
835 *
836 * sysfs attributes
837 *
838 *****************************************************************************/
839
840 #ifdef CONFIG_IWLWIFI_DEBUG
841
842 /*
843 * The following adds a new attribute to the sysfs representation
844 * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
845 * used for controlling the debug level.
846 *
847 * See the level definitions in iwl for details.
848 *
849 * The debug_level being managed using sysfs below is a per device debug
850 * level that is used instead of the global debug level if it (the per
851 * device debug level) is set.
852 */
853 static ssize_t show_debug_level(struct device *d,
854 struct device_attribute *attr, char *buf)
855 {
856 struct iwl_priv *priv = dev_get_drvdata(d);
857 return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
858 }
859 static ssize_t store_debug_level(struct device *d,
860 struct device_attribute *attr,
861 const char *buf, size_t count)
862 {
863 struct iwl_priv *priv = dev_get_drvdata(d);
864 unsigned long val;
865 int ret;
866
867 ret = strict_strtoul(buf, 0, &val);
868 if (ret)
869 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
870 else {
871 priv->debug_level = val;
872 if (iwl_alloc_traffic_mem(priv))
873 IWL_ERR(priv,
874 "Not enough memory to generate traffic log\n");
875 }
876 return strnlen(buf, count);
877 }
878
879 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
880 show_debug_level, store_debug_level);
881
882
883 #endif /* CONFIG_IWLWIFI_DEBUG */
884
885
886 static ssize_t show_temperature(struct device *d,
887 struct device_attribute *attr, char *buf)
888 {
889 struct iwl_priv *priv = dev_get_drvdata(d);
890
891 if (!iwl_is_alive(priv))
892 return -EAGAIN;
893
894 return sprintf(buf, "%d\n", priv->temperature);
895 }
896
897 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
898
899 static ssize_t show_tx_power(struct device *d,
900 struct device_attribute *attr, char *buf)
901 {
902 struct iwl_priv *priv = dev_get_drvdata(d);
903
904 if (!iwl_is_ready_rf(priv))
905 return sprintf(buf, "off\n");
906 else
907 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
908 }
909
910 static ssize_t store_tx_power(struct device *d,
911 struct device_attribute *attr,
912 const char *buf, size_t count)
913 {
914 struct iwl_priv *priv = dev_get_drvdata(d);
915 unsigned long val;
916 int ret;
917
918 ret = strict_strtoul(buf, 10, &val);
919 if (ret)
920 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
921 else {
922 ret = iwl_set_tx_power(priv, val, false);
923 if (ret)
924 IWL_ERR(priv, "failed setting tx power (0x%d).\n",
925 ret);
926 else
927 ret = count;
928 }
929 return ret;
930 }
931
932 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
933
934 static struct attribute *iwl_sysfs_entries[] = {
935 &dev_attr_temperature.attr,
936 &dev_attr_tx_power.attr,
937 #ifdef CONFIG_IWLWIFI_DEBUG
938 &dev_attr_debug_level.attr,
939 #endif
940 NULL
941 };
942
943 static struct attribute_group iwl_attribute_group = {
944 .name = NULL, /* put in device directory */
945 .attrs = iwl_sysfs_entries,
946 };
947
948 /******************************************************************************
949 *
950 * uCode download functions
951 *
952 ******************************************************************************/
953
954 static void iwl_free_fw_desc(struct iwl_priv *priv, struct fw_desc *desc)
955 {
956 if (desc->v_addr)
957 dma_free_coherent(priv->bus.dev, desc->len,
958 desc->v_addr, desc->p_addr);
959 desc->v_addr = NULL;
960 desc->len = 0;
961 }
962
963 static void iwl_free_fw_img(struct iwl_priv *priv, struct fw_img *img)
964 {
965 iwl_free_fw_desc(priv, &img->code);
966 iwl_free_fw_desc(priv, &img->data);
967 }
968
969 static void iwl_dealloc_ucode(struct iwl_priv *priv)
970 {
971 iwl_free_fw_img(priv, &priv->ucode_rt);
972 iwl_free_fw_img(priv, &priv->ucode_init);
973 }
974
975 static int iwl_alloc_fw_desc(struct iwl_priv *priv, struct fw_desc *desc,
976 const void *data, size_t len)
977 {
978 if (!len) {
979 desc->v_addr = NULL;
980 return -EINVAL;
981 }
982
983 desc->v_addr = dma_alloc_coherent(priv->bus.dev, len,
984 &desc->p_addr, GFP_KERNEL);
985 if (!desc->v_addr)
986 return -ENOMEM;
987
988 desc->len = len;
989 memcpy(desc->v_addr, data, len);
990 return 0;
991 }
992
993 struct iwlagn_ucode_capabilities {
994 u32 max_probe_length;
995 u32 standard_phy_calibration_size;
996 u32 flags;
997 };
998
999 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
1000 static int iwl_mac_setup_register(struct iwl_priv *priv,
1001 struct iwlagn_ucode_capabilities *capa);
1002
1003 #define UCODE_EXPERIMENTAL_INDEX 100
1004 #define UCODE_EXPERIMENTAL_TAG "exp"
1005
1006 static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first)
1007 {
1008 const char *name_pre = priv->cfg->fw_name_pre;
1009 char tag[8];
1010
1011 if (first) {
1012 #ifdef CONFIG_IWLWIFI_DEBUG_EXPERIMENTAL_UCODE
1013 priv->fw_index = UCODE_EXPERIMENTAL_INDEX;
1014 strcpy(tag, UCODE_EXPERIMENTAL_TAG);
1015 } else if (priv->fw_index == UCODE_EXPERIMENTAL_INDEX) {
1016 #endif
1017 priv->fw_index = priv->cfg->ucode_api_max;
1018 sprintf(tag, "%d", priv->fw_index);
1019 } else {
1020 priv->fw_index--;
1021 sprintf(tag, "%d", priv->fw_index);
1022 }
1023
1024 if (priv->fw_index < priv->cfg->ucode_api_min) {
1025 IWL_ERR(priv, "no suitable firmware found!\n");
1026 return -ENOENT;
1027 }
1028
1029 sprintf(priv->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
1030
1031 IWL_DEBUG_INFO(priv, "attempting to load firmware %s'%s'\n",
1032 (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1033 ? "EXPERIMENTAL " : "",
1034 priv->firmware_name);
1035
1036 return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name,
1037 priv->bus.dev,
1038 GFP_KERNEL, priv, iwl_ucode_callback);
1039 }
1040
1041 struct iwlagn_firmware_pieces {
1042 const void *inst, *data, *init, *init_data;
1043 size_t inst_size, data_size, init_size, init_data_size;
1044
1045 u32 build;
1046
1047 u32 init_evtlog_ptr, init_evtlog_size, init_errlog_ptr;
1048 u32 inst_evtlog_ptr, inst_evtlog_size, inst_errlog_ptr;
1049 };
1050
1051 static int iwlagn_load_legacy_firmware(struct iwl_priv *priv,
1052 const struct firmware *ucode_raw,
1053 struct iwlagn_firmware_pieces *pieces)
1054 {
1055 struct iwl_ucode_header *ucode = (void *)ucode_raw->data;
1056 u32 api_ver, hdr_size;
1057 const u8 *src;
1058
1059 priv->ucode_ver = le32_to_cpu(ucode->ver);
1060 api_ver = IWL_UCODE_API(priv->ucode_ver);
1061
1062 switch (api_ver) {
1063 default:
1064 hdr_size = 28;
1065 if (ucode_raw->size < hdr_size) {
1066 IWL_ERR(priv, "File size too small!\n");
1067 return -EINVAL;
1068 }
1069 pieces->build = le32_to_cpu(ucode->u.v2.build);
1070 pieces->inst_size = le32_to_cpu(ucode->u.v2.inst_size);
1071 pieces->data_size = le32_to_cpu(ucode->u.v2.data_size);
1072 pieces->init_size = le32_to_cpu(ucode->u.v2.init_size);
1073 pieces->init_data_size = le32_to_cpu(ucode->u.v2.init_data_size);
1074 src = ucode->u.v2.data;
1075 break;
1076 case 0:
1077 case 1:
1078 case 2:
1079 hdr_size = 24;
1080 if (ucode_raw->size < hdr_size) {
1081 IWL_ERR(priv, "File size too small!\n");
1082 return -EINVAL;
1083 }
1084 pieces->build = 0;
1085 pieces->inst_size = le32_to_cpu(ucode->u.v1.inst_size);
1086 pieces->data_size = le32_to_cpu(ucode->u.v1.data_size);
1087 pieces->init_size = le32_to_cpu(ucode->u.v1.init_size);
1088 pieces->init_data_size = le32_to_cpu(ucode->u.v1.init_data_size);
1089 src = ucode->u.v1.data;
1090 break;
1091 }
1092
1093 /* Verify size of file vs. image size info in file's header */
1094 if (ucode_raw->size != hdr_size + pieces->inst_size +
1095 pieces->data_size + pieces->init_size +
1096 pieces->init_data_size) {
1097
1098 IWL_ERR(priv,
1099 "uCode file size %d does not match expected size\n",
1100 (int)ucode_raw->size);
1101 return -EINVAL;
1102 }
1103
1104 pieces->inst = src;
1105 src += pieces->inst_size;
1106 pieces->data = src;
1107 src += pieces->data_size;
1108 pieces->init = src;
1109 src += pieces->init_size;
1110 pieces->init_data = src;
1111 src += pieces->init_data_size;
1112
1113 return 0;
1114 }
1115
1116 static int iwlagn_wanted_ucode_alternative = 1;
1117
1118 static int iwlagn_load_firmware(struct iwl_priv *priv,
1119 const struct firmware *ucode_raw,
1120 struct iwlagn_firmware_pieces *pieces,
1121 struct iwlagn_ucode_capabilities *capa)
1122 {
1123 struct iwl_tlv_ucode_header *ucode = (void *)ucode_raw->data;
1124 struct iwl_ucode_tlv *tlv;
1125 size_t len = ucode_raw->size;
1126 const u8 *data;
1127 int wanted_alternative = iwlagn_wanted_ucode_alternative, tmp;
1128 u64 alternatives;
1129 u32 tlv_len;
1130 enum iwl_ucode_tlv_type tlv_type;
1131 const u8 *tlv_data;
1132
1133 if (len < sizeof(*ucode)) {
1134 IWL_ERR(priv, "uCode has invalid length: %zd\n", len);
1135 return -EINVAL;
1136 }
1137
1138 if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC)) {
1139 IWL_ERR(priv, "invalid uCode magic: 0X%x\n",
1140 le32_to_cpu(ucode->magic));
1141 return -EINVAL;
1142 }
1143
1144 /*
1145 * Check which alternatives are present, and "downgrade"
1146 * when the chosen alternative is not present, warning
1147 * the user when that happens. Some files may not have
1148 * any alternatives, so don't warn in that case.
1149 */
1150 alternatives = le64_to_cpu(ucode->alternatives);
1151 tmp = wanted_alternative;
1152 if (wanted_alternative > 63)
1153 wanted_alternative = 63;
1154 while (wanted_alternative && !(alternatives & BIT(wanted_alternative)))
1155 wanted_alternative--;
1156 if (wanted_alternative && wanted_alternative != tmp)
1157 IWL_WARN(priv,
1158 "uCode alternative %d not available, choosing %d\n",
1159 tmp, wanted_alternative);
1160
1161 priv->ucode_ver = le32_to_cpu(ucode->ver);
1162 pieces->build = le32_to_cpu(ucode->build);
1163 data = ucode->data;
1164
1165 len -= sizeof(*ucode);
1166
1167 while (len >= sizeof(*tlv)) {
1168 u16 tlv_alt;
1169
1170 len -= sizeof(*tlv);
1171 tlv = (void *)data;
1172
1173 tlv_len = le32_to_cpu(tlv->length);
1174 tlv_type = le16_to_cpu(tlv->type);
1175 tlv_alt = le16_to_cpu(tlv->alternative);
1176 tlv_data = tlv->data;
1177
1178 if (len < tlv_len) {
1179 IWL_ERR(priv, "invalid TLV len: %zd/%u\n",
1180 len, tlv_len);
1181 return -EINVAL;
1182 }
1183 len -= ALIGN(tlv_len, 4);
1184 data += sizeof(*tlv) + ALIGN(tlv_len, 4);
1185
1186 /*
1187 * Alternative 0 is always valid.
1188 *
1189 * Skip alternative TLVs that are not selected.
1190 */
1191 if (tlv_alt != 0 && tlv_alt != wanted_alternative)
1192 continue;
1193
1194 switch (tlv_type) {
1195 case IWL_UCODE_TLV_INST:
1196 pieces->inst = tlv_data;
1197 pieces->inst_size = tlv_len;
1198 break;
1199 case IWL_UCODE_TLV_DATA:
1200 pieces->data = tlv_data;
1201 pieces->data_size = tlv_len;
1202 break;
1203 case IWL_UCODE_TLV_INIT:
1204 pieces->init = tlv_data;
1205 pieces->init_size = tlv_len;
1206 break;
1207 case IWL_UCODE_TLV_INIT_DATA:
1208 pieces->init_data = tlv_data;
1209 pieces->init_data_size = tlv_len;
1210 break;
1211 case IWL_UCODE_TLV_BOOT:
1212 IWL_ERR(priv, "Found unexpected BOOT ucode\n");
1213 break;
1214 case IWL_UCODE_TLV_PROBE_MAX_LEN:
1215 if (tlv_len != sizeof(u32))
1216 goto invalid_tlv_len;
1217 capa->max_probe_length =
1218 le32_to_cpup((__le32 *)tlv_data);
1219 break;
1220 case IWL_UCODE_TLV_PAN:
1221 if (tlv_len)
1222 goto invalid_tlv_len;
1223 capa->flags |= IWL_UCODE_TLV_FLAGS_PAN;
1224 break;
1225 case IWL_UCODE_TLV_FLAGS:
1226 /* must be at least one u32 */
1227 if (tlv_len < sizeof(u32))
1228 goto invalid_tlv_len;
1229 /* and a proper number of u32s */
1230 if (tlv_len % sizeof(u32))
1231 goto invalid_tlv_len;
1232 /*
1233 * This driver only reads the first u32 as
1234 * right now no more features are defined,
1235 * if that changes then either the driver
1236 * will not work with the new firmware, or
1237 * it'll not take advantage of new features.
1238 */
1239 capa->flags = le32_to_cpup((__le32 *)tlv_data);
1240 break;
1241 case IWL_UCODE_TLV_INIT_EVTLOG_PTR:
1242 if (tlv_len != sizeof(u32))
1243 goto invalid_tlv_len;
1244 pieces->init_evtlog_ptr =
1245 le32_to_cpup((__le32 *)tlv_data);
1246 break;
1247 case IWL_UCODE_TLV_INIT_EVTLOG_SIZE:
1248 if (tlv_len != sizeof(u32))
1249 goto invalid_tlv_len;
1250 pieces->init_evtlog_size =
1251 le32_to_cpup((__le32 *)tlv_data);
1252 break;
1253 case IWL_UCODE_TLV_INIT_ERRLOG_PTR:
1254 if (tlv_len != sizeof(u32))
1255 goto invalid_tlv_len;
1256 pieces->init_errlog_ptr =
1257 le32_to_cpup((__le32 *)tlv_data);
1258 break;
1259 case IWL_UCODE_TLV_RUNT_EVTLOG_PTR:
1260 if (tlv_len != sizeof(u32))
1261 goto invalid_tlv_len;
1262 pieces->inst_evtlog_ptr =
1263 le32_to_cpup((__le32 *)tlv_data);
1264 break;
1265 case IWL_UCODE_TLV_RUNT_EVTLOG_SIZE:
1266 if (tlv_len != sizeof(u32))
1267 goto invalid_tlv_len;
1268 pieces->inst_evtlog_size =
1269 le32_to_cpup((__le32 *)tlv_data);
1270 break;
1271 case IWL_UCODE_TLV_RUNT_ERRLOG_PTR:
1272 if (tlv_len != sizeof(u32))
1273 goto invalid_tlv_len;
1274 pieces->inst_errlog_ptr =
1275 le32_to_cpup((__le32 *)tlv_data);
1276 break;
1277 case IWL_UCODE_TLV_ENHANCE_SENS_TBL:
1278 if (tlv_len)
1279 goto invalid_tlv_len;
1280 priv->enhance_sensitivity_table = true;
1281 break;
1282 case IWL_UCODE_TLV_PHY_CALIBRATION_SIZE:
1283 if (tlv_len != sizeof(u32))
1284 goto invalid_tlv_len;
1285 capa->standard_phy_calibration_size =
1286 le32_to_cpup((__le32 *)tlv_data);
1287 break;
1288 default:
1289 IWL_DEBUG_INFO(priv, "unknown TLV: %d\n", tlv_type);
1290 break;
1291 }
1292 }
1293
1294 if (len) {
1295 IWL_ERR(priv, "invalid TLV after parsing: %zd\n", len);
1296 iwl_print_hex_dump(priv, IWL_DL_FW, (u8 *)data, len);
1297 return -EINVAL;
1298 }
1299
1300 return 0;
1301
1302 invalid_tlv_len:
1303 IWL_ERR(priv, "TLV %d has invalid size: %u\n", tlv_type, tlv_len);
1304 iwl_print_hex_dump(priv, IWL_DL_FW, tlv_data, tlv_len);
1305
1306 return -EINVAL;
1307 }
1308
1309 /**
1310 * iwl_ucode_callback - callback when firmware was loaded
1311 *
1312 * If loaded successfully, copies the firmware into buffers
1313 * for the card to fetch (via DMA).
1314 */
1315 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
1316 {
1317 struct iwl_priv *priv = context;
1318 struct iwl_ucode_header *ucode;
1319 int err;
1320 struct iwlagn_firmware_pieces pieces;
1321 const unsigned int api_max = priv->cfg->ucode_api_max;
1322 const unsigned int api_min = priv->cfg->ucode_api_min;
1323 u32 api_ver;
1324 char buildstr[25];
1325 u32 build;
1326 struct iwlagn_ucode_capabilities ucode_capa = {
1327 .max_probe_length = 200,
1328 .standard_phy_calibration_size =
1329 IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE,
1330 };
1331
1332 memset(&pieces, 0, sizeof(pieces));
1333
1334 if (!ucode_raw) {
1335 if (priv->fw_index <= priv->cfg->ucode_api_max)
1336 IWL_ERR(priv,
1337 "request for firmware file '%s' failed.\n",
1338 priv->firmware_name);
1339 goto try_again;
1340 }
1341
1342 IWL_DEBUG_INFO(priv, "Loaded firmware file '%s' (%zd bytes).\n",
1343 priv->firmware_name, ucode_raw->size);
1344
1345 /* Make sure that we got at least the API version number */
1346 if (ucode_raw->size < 4) {
1347 IWL_ERR(priv, "File size way too small!\n");
1348 goto try_again;
1349 }
1350
1351 /* Data from ucode file: header followed by uCode images */
1352 ucode = (struct iwl_ucode_header *)ucode_raw->data;
1353
1354 if (ucode->ver)
1355 err = iwlagn_load_legacy_firmware(priv, ucode_raw, &pieces);
1356 else
1357 err = iwlagn_load_firmware(priv, ucode_raw, &pieces,
1358 &ucode_capa);
1359
1360 if (err)
1361 goto try_again;
1362
1363 api_ver = IWL_UCODE_API(priv->ucode_ver);
1364 build = pieces.build;
1365
1366 /*
1367 * api_ver should match the api version forming part of the
1368 * firmware filename ... but we don't check for that and only rely
1369 * on the API version read from firmware header from here on forward
1370 */
1371 /* no api version check required for experimental uCode */
1372 if (priv->fw_index != UCODE_EXPERIMENTAL_INDEX) {
1373 if (api_ver < api_min || api_ver > api_max) {
1374 IWL_ERR(priv,
1375 "Driver unable to support your firmware API. "
1376 "Driver supports v%u, firmware is v%u.\n",
1377 api_max, api_ver);
1378 goto try_again;
1379 }
1380
1381 if (api_ver != api_max)
1382 IWL_ERR(priv,
1383 "Firmware has old API version. Expected v%u, "
1384 "got v%u. New firmware can be obtained "
1385 "from http://www.intellinuxwireless.org.\n",
1386 api_max, api_ver);
1387 }
1388
1389 if (build)
1390 sprintf(buildstr, " build %u%s", build,
1391 (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1392 ? " (EXP)" : "");
1393 else
1394 buildstr[0] = '\0';
1395
1396 IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u%s\n",
1397 IWL_UCODE_MAJOR(priv->ucode_ver),
1398 IWL_UCODE_MINOR(priv->ucode_ver),
1399 IWL_UCODE_API(priv->ucode_ver),
1400 IWL_UCODE_SERIAL(priv->ucode_ver),
1401 buildstr);
1402
1403 snprintf(priv->hw->wiphy->fw_version,
1404 sizeof(priv->hw->wiphy->fw_version),
1405 "%u.%u.%u.%u%s",
1406 IWL_UCODE_MAJOR(priv->ucode_ver),
1407 IWL_UCODE_MINOR(priv->ucode_ver),
1408 IWL_UCODE_API(priv->ucode_ver),
1409 IWL_UCODE_SERIAL(priv->ucode_ver),
1410 buildstr);
1411
1412 /*
1413 * For any of the failures below (before allocating pci memory)
1414 * we will try to load a version with a smaller API -- maybe the
1415 * user just got a corrupted version of the latest API.
1416 */
1417
1418 IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1419 priv->ucode_ver);
1420 IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %Zd\n",
1421 pieces.inst_size);
1422 IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %Zd\n",
1423 pieces.data_size);
1424 IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %Zd\n",
1425 pieces.init_size);
1426 IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %Zd\n",
1427 pieces.init_data_size);
1428
1429 /* Verify that uCode images will fit in card's SRAM */
1430 if (pieces.inst_size > priv->hw_params.max_inst_size) {
1431 IWL_ERR(priv, "uCode instr len %Zd too large to fit in\n",
1432 pieces.inst_size);
1433 goto try_again;
1434 }
1435
1436 if (pieces.data_size > priv->hw_params.max_data_size) {
1437 IWL_ERR(priv, "uCode data len %Zd too large to fit in\n",
1438 pieces.data_size);
1439 goto try_again;
1440 }
1441
1442 if (pieces.init_size > priv->hw_params.max_inst_size) {
1443 IWL_ERR(priv, "uCode init instr len %Zd too large to fit in\n",
1444 pieces.init_size);
1445 goto try_again;
1446 }
1447
1448 if (pieces.init_data_size > priv->hw_params.max_data_size) {
1449 IWL_ERR(priv, "uCode init data len %Zd too large to fit in\n",
1450 pieces.init_data_size);
1451 goto try_again;
1452 }
1453
1454 /* Allocate ucode buffers for card's bus-master loading ... */
1455
1456 /* Runtime instructions and 2 copies of data:
1457 * 1) unmodified from disk
1458 * 2) backup cache for save/restore during power-downs */
1459 if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.code,
1460 pieces.inst, pieces.inst_size))
1461 goto err_pci_alloc;
1462 if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.data,
1463 pieces.data, pieces.data_size))
1464 goto err_pci_alloc;
1465
1466 /* Initialization instructions and data */
1467 if (pieces.init_size && pieces.init_data_size) {
1468 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.code,
1469 pieces.init, pieces.init_size))
1470 goto err_pci_alloc;
1471 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.data,
1472 pieces.init_data, pieces.init_data_size))
1473 goto err_pci_alloc;
1474 }
1475
1476 /* Now that we can no longer fail, copy information */
1477
1478 /*
1479 * The (size - 16) / 12 formula is based on the information recorded
1480 * for each event, which is of mode 1 (including timestamp) for all
1481 * new microcodes that include this information.
1482 */
1483 priv->_agn.init_evtlog_ptr = pieces.init_evtlog_ptr;
1484 if (pieces.init_evtlog_size)
1485 priv->_agn.init_evtlog_size = (pieces.init_evtlog_size - 16)/12;
1486 else
1487 priv->_agn.init_evtlog_size =
1488 priv->cfg->base_params->max_event_log_size;
1489 priv->_agn.init_errlog_ptr = pieces.init_errlog_ptr;
1490 priv->_agn.inst_evtlog_ptr = pieces.inst_evtlog_ptr;
1491 if (pieces.inst_evtlog_size)
1492 priv->_agn.inst_evtlog_size = (pieces.inst_evtlog_size - 16)/12;
1493 else
1494 priv->_agn.inst_evtlog_size =
1495 priv->cfg->base_params->max_event_log_size;
1496 priv->_agn.inst_errlog_ptr = pieces.inst_errlog_ptr;
1497
1498 priv->new_scan_threshold_behaviour =
1499 !!(ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1500
1501 if ((priv->cfg->sku & EEPROM_SKU_CAP_IPAN_ENABLE) &&
1502 (ucode_capa.flags & IWL_UCODE_TLV_FLAGS_PAN)) {
1503 priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
1504 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1505 } else
1506 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1507
1508 if (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS))
1509 priv->cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1510 else
1511 priv->cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1512
1513 /*
1514 * figure out the offset of chain noise reset and gain commands
1515 * base on the size of standard phy calibration commands table size
1516 */
1517 if (ucode_capa.standard_phy_calibration_size >
1518 IWL_MAX_PHY_CALIBRATE_TBL_SIZE)
1519 ucode_capa.standard_phy_calibration_size =
1520 IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE;
1521
1522 priv->_agn.phy_calib_chain_noise_reset_cmd =
1523 ucode_capa.standard_phy_calibration_size;
1524 priv->_agn.phy_calib_chain_noise_gain_cmd =
1525 ucode_capa.standard_phy_calibration_size + 1;
1526
1527 /**************************************************
1528 * This is still part of probe() in a sense...
1529 *
1530 * 9. Setup and register with mac80211 and debugfs
1531 **************************************************/
1532 err = iwl_mac_setup_register(priv, &ucode_capa);
1533 if (err)
1534 goto out_unbind;
1535
1536 err = iwl_dbgfs_register(priv, DRV_NAME);
1537 if (err)
1538 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
1539
1540 err = sysfs_create_group(&(priv->bus.dev->kobj),
1541 &iwl_attribute_group);
1542 if (err) {
1543 IWL_ERR(priv, "failed to create sysfs device attributes\n");
1544 goto out_unbind;
1545 }
1546
1547 /* We have our copies now, allow OS release its copies */
1548 release_firmware(ucode_raw);
1549 complete(&priv->_agn.firmware_loading_complete);
1550 return;
1551
1552 try_again:
1553 /* try next, if any */
1554 if (iwl_request_firmware(priv, false))
1555 goto out_unbind;
1556 release_firmware(ucode_raw);
1557 return;
1558
1559 err_pci_alloc:
1560 IWL_ERR(priv, "failed to allocate pci memory\n");
1561 iwl_dealloc_ucode(priv);
1562 out_unbind:
1563 complete(&priv->_agn.firmware_loading_complete);
1564 device_release_driver(priv->bus.dev);
1565 release_firmware(ucode_raw);
1566 }
1567
1568 static const char *desc_lookup_text[] = {
1569 "OK",
1570 "FAIL",
1571 "BAD_PARAM",
1572 "BAD_CHECKSUM",
1573 "NMI_INTERRUPT_WDG",
1574 "SYSASSERT",
1575 "FATAL_ERROR",
1576 "BAD_COMMAND",
1577 "HW_ERROR_TUNE_LOCK",
1578 "HW_ERROR_TEMPERATURE",
1579 "ILLEGAL_CHAN_FREQ",
1580 "VCC_NOT_STABLE",
1581 "FH_ERROR",
1582 "NMI_INTERRUPT_HOST",
1583 "NMI_INTERRUPT_ACTION_PT",
1584 "NMI_INTERRUPT_UNKNOWN",
1585 "UCODE_VERSION_MISMATCH",
1586 "HW_ERROR_ABS_LOCK",
1587 "HW_ERROR_CAL_LOCK_FAIL",
1588 "NMI_INTERRUPT_INST_ACTION_PT",
1589 "NMI_INTERRUPT_DATA_ACTION_PT",
1590 "NMI_TRM_HW_ER",
1591 "NMI_INTERRUPT_TRM",
1592 "NMI_INTERRUPT_BREAK_POINT"
1593 "DEBUG_0",
1594 "DEBUG_1",
1595 "DEBUG_2",
1596 "DEBUG_3",
1597 };
1598
1599 static struct { char *name; u8 num; } advanced_lookup[] = {
1600 { "NMI_INTERRUPT_WDG", 0x34 },
1601 { "SYSASSERT", 0x35 },
1602 { "UCODE_VERSION_MISMATCH", 0x37 },
1603 { "BAD_COMMAND", 0x38 },
1604 { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
1605 { "FATAL_ERROR", 0x3D },
1606 { "NMI_TRM_HW_ERR", 0x46 },
1607 { "NMI_INTERRUPT_TRM", 0x4C },
1608 { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
1609 { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
1610 { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
1611 { "NMI_INTERRUPT_HOST", 0x66 },
1612 { "NMI_INTERRUPT_ACTION_PT", 0x7C },
1613 { "NMI_INTERRUPT_UNKNOWN", 0x84 },
1614 { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
1615 { "ADVANCED_SYSASSERT", 0 },
1616 };
1617
1618 static const char *desc_lookup(u32 num)
1619 {
1620 int i;
1621 int max = ARRAY_SIZE(desc_lookup_text);
1622
1623 if (num < max)
1624 return desc_lookup_text[num];
1625
1626 max = ARRAY_SIZE(advanced_lookup) - 1;
1627 for (i = 0; i < max; i++) {
1628 if (advanced_lookup[i].num == num)
1629 break;
1630 }
1631 return advanced_lookup[i].name;
1632 }
1633
1634 #define ERROR_START_OFFSET (1 * sizeof(u32))
1635 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
1636
1637 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1638 {
1639 u32 base;
1640 struct iwl_error_event_table table;
1641
1642 base = priv->device_pointers.error_event_table;
1643 if (priv->ucode_type == IWL_UCODE_INIT) {
1644 if (!base)
1645 base = priv->_agn.init_errlog_ptr;
1646 } else {
1647 if (!base)
1648 base = priv->_agn.inst_errlog_ptr;
1649 }
1650
1651 if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1652 IWL_ERR(priv,
1653 "Not valid error log pointer 0x%08X for %s uCode\n",
1654 base,
1655 (priv->ucode_type == IWL_UCODE_INIT)
1656 ? "Init" : "RT");
1657 return;
1658 }
1659
1660 iwl_read_targ_mem_words(priv, base, &table, sizeof(table));
1661
1662 if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
1663 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1664 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1665 priv->status, table.valid);
1666 }
1667
1668 priv->isr_stats.err_code = table.error_id;
1669
1670 trace_iwlwifi_dev_ucode_error(priv, table.error_id, table.tsf_low,
1671 table.data1, table.data2, table.line,
1672 table.blink1, table.blink2, table.ilink1,
1673 table.ilink2, table.bcon_time, table.gp1,
1674 table.gp2, table.gp3, table.ucode_ver,
1675 table.hw_ver, table.brd_ver);
1676 IWL_ERR(priv, "0x%08X | %-28s\n", table.error_id,
1677 desc_lookup(table.error_id));
1678 IWL_ERR(priv, "0x%08X | uPc\n", table.pc);
1679 IWL_ERR(priv, "0x%08X | branchlink1\n", table.blink1);
1680 IWL_ERR(priv, "0x%08X | branchlink2\n", table.blink2);
1681 IWL_ERR(priv, "0x%08X | interruptlink1\n", table.ilink1);
1682 IWL_ERR(priv, "0x%08X | interruptlink2\n", table.ilink2);
1683 IWL_ERR(priv, "0x%08X | data1\n", table.data1);
1684 IWL_ERR(priv, "0x%08X | data2\n", table.data2);
1685 IWL_ERR(priv, "0x%08X | line\n", table.line);
1686 IWL_ERR(priv, "0x%08X | beacon time\n", table.bcon_time);
1687 IWL_ERR(priv, "0x%08X | tsf low\n", table.tsf_low);
1688 IWL_ERR(priv, "0x%08X | tsf hi\n", table.tsf_hi);
1689 IWL_ERR(priv, "0x%08X | time gp1\n", table.gp1);
1690 IWL_ERR(priv, "0x%08X | time gp2\n", table.gp2);
1691 IWL_ERR(priv, "0x%08X | time gp3\n", table.gp3);
1692 IWL_ERR(priv, "0x%08X | uCode version\n", table.ucode_ver);
1693 IWL_ERR(priv, "0x%08X | hw version\n", table.hw_ver);
1694 IWL_ERR(priv, "0x%08X | board version\n", table.brd_ver);
1695 IWL_ERR(priv, "0x%08X | hcmd\n", table.hcmd);
1696 }
1697
1698 #define EVENT_START_OFFSET (4 * sizeof(u32))
1699
1700 /**
1701 * iwl_print_event_log - Dump error event log to syslog
1702 *
1703 */
1704 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1705 u32 num_events, u32 mode,
1706 int pos, char **buf, size_t bufsz)
1707 {
1708 u32 i;
1709 u32 base; /* SRAM byte address of event log header */
1710 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1711 u32 ptr; /* SRAM byte address of log data */
1712 u32 ev, time, data; /* event log data */
1713 unsigned long reg_flags;
1714
1715 if (num_events == 0)
1716 return pos;
1717
1718 base = priv->device_pointers.log_event_table;
1719 if (priv->ucode_type == IWL_UCODE_INIT) {
1720 if (!base)
1721 base = priv->_agn.init_evtlog_ptr;
1722 } else {
1723 if (!base)
1724 base = priv->_agn.inst_evtlog_ptr;
1725 }
1726
1727 if (mode == 0)
1728 event_size = 2 * sizeof(u32);
1729 else
1730 event_size = 3 * sizeof(u32);
1731
1732 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1733
1734 /* Make sure device is powered up for SRAM reads */
1735 spin_lock_irqsave(&priv->reg_lock, reg_flags);
1736 iwl_grab_nic_access(priv);
1737
1738 /* Set starting address; reads will auto-increment */
1739 iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
1740 rmb();
1741
1742 /* "time" is actually "data" for mode 0 (no timestamp).
1743 * place event id # at far right for easier visual parsing. */
1744 for (i = 0; i < num_events; i++) {
1745 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1746 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1747 if (mode == 0) {
1748 /* data, ev */
1749 if (bufsz) {
1750 pos += scnprintf(*buf + pos, bufsz - pos,
1751 "EVT_LOG:0x%08x:%04u\n",
1752 time, ev);
1753 } else {
1754 trace_iwlwifi_dev_ucode_event(priv, 0,
1755 time, ev);
1756 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1757 time, ev);
1758 }
1759 } else {
1760 data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1761 if (bufsz) {
1762 pos += scnprintf(*buf + pos, bufsz - pos,
1763 "EVT_LOGT:%010u:0x%08x:%04u\n",
1764 time, data, ev);
1765 } else {
1766 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1767 time, data, ev);
1768 trace_iwlwifi_dev_ucode_event(priv, time,
1769 data, ev);
1770 }
1771 }
1772 }
1773
1774 /* Allow device to power down */
1775 iwl_release_nic_access(priv);
1776 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1777 return pos;
1778 }
1779
1780 /**
1781 * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1782 */
1783 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1784 u32 num_wraps, u32 next_entry,
1785 u32 size, u32 mode,
1786 int pos, char **buf, size_t bufsz)
1787 {
1788 /*
1789 * display the newest DEFAULT_LOG_ENTRIES entries
1790 * i.e the entries just before the next ont that uCode would fill.
1791 */
1792 if (num_wraps) {
1793 if (next_entry < size) {
1794 pos = iwl_print_event_log(priv,
1795 capacity - (size - next_entry),
1796 size - next_entry, mode,
1797 pos, buf, bufsz);
1798 pos = iwl_print_event_log(priv, 0,
1799 next_entry, mode,
1800 pos, buf, bufsz);
1801 } else
1802 pos = iwl_print_event_log(priv, next_entry - size,
1803 size, mode, pos, buf, bufsz);
1804 } else {
1805 if (next_entry < size) {
1806 pos = iwl_print_event_log(priv, 0, next_entry,
1807 mode, pos, buf, bufsz);
1808 } else {
1809 pos = iwl_print_event_log(priv, next_entry - size,
1810 size, mode, pos, buf, bufsz);
1811 }
1812 }
1813 return pos;
1814 }
1815
1816 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1817
1818 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1819 char **buf, bool display)
1820 {
1821 u32 base; /* SRAM byte address of event log header */
1822 u32 capacity; /* event log capacity in # entries */
1823 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
1824 u32 num_wraps; /* # times uCode wrapped to top of log */
1825 u32 next_entry; /* index of next entry to be written by uCode */
1826 u32 size; /* # entries that we'll print */
1827 u32 logsize;
1828 int pos = 0;
1829 size_t bufsz = 0;
1830
1831 base = priv->device_pointers.log_event_table;
1832 if (priv->ucode_type == IWL_UCODE_INIT) {
1833 logsize = priv->_agn.init_evtlog_size;
1834 if (!base)
1835 base = priv->_agn.init_evtlog_ptr;
1836 } else {
1837 logsize = priv->_agn.inst_evtlog_size;
1838 if (!base)
1839 base = priv->_agn.inst_evtlog_ptr;
1840 }
1841
1842 if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1843 IWL_ERR(priv,
1844 "Invalid event log pointer 0x%08X for %s uCode\n",
1845 base,
1846 (priv->ucode_type == IWL_UCODE_INIT)
1847 ? "Init" : "RT");
1848 return -EINVAL;
1849 }
1850
1851 /* event log header */
1852 capacity = iwl_read_targ_mem(priv, base);
1853 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1854 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1855 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1856
1857 if (capacity > logsize) {
1858 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1859 capacity, logsize);
1860 capacity = logsize;
1861 }
1862
1863 if (next_entry > logsize) {
1864 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1865 next_entry, logsize);
1866 next_entry = logsize;
1867 }
1868
1869 size = num_wraps ? capacity : next_entry;
1870
1871 /* bail out if nothing in log */
1872 if (size == 0) {
1873 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1874 return pos;
1875 }
1876
1877 /* enable/disable bt channel inhibition */
1878 priv->bt_ch_announce = iwlagn_bt_ch_announce;
1879
1880 #ifdef CONFIG_IWLWIFI_DEBUG
1881 if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1882 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1883 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1884 #else
1885 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1886 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1887 #endif
1888 IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
1889 size);
1890
1891 #ifdef CONFIG_IWLWIFI_DEBUG
1892 if (display) {
1893 if (full_log)
1894 bufsz = capacity * 48;
1895 else
1896 bufsz = size * 48;
1897 *buf = kmalloc(bufsz, GFP_KERNEL);
1898 if (!*buf)
1899 return -ENOMEM;
1900 }
1901 if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1902 /*
1903 * if uCode has wrapped back to top of log,
1904 * start at the oldest entry,
1905 * i.e the next one that uCode would fill.
1906 */
1907 if (num_wraps)
1908 pos = iwl_print_event_log(priv, next_entry,
1909 capacity - next_entry, mode,
1910 pos, buf, bufsz);
1911 /* (then/else) start at top of log */
1912 pos = iwl_print_event_log(priv, 0,
1913 next_entry, mode, pos, buf, bufsz);
1914 } else
1915 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1916 next_entry, size, mode,
1917 pos, buf, bufsz);
1918 #else
1919 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1920 next_entry, size, mode,
1921 pos, buf, bufsz);
1922 #endif
1923 return pos;
1924 }
1925
1926 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1927 {
1928 struct iwl_ct_kill_config cmd;
1929 struct iwl_ct_kill_throttling_config adv_cmd;
1930 unsigned long flags;
1931 int ret = 0;
1932
1933 spin_lock_irqsave(&priv->lock, flags);
1934 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1935 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1936 spin_unlock_irqrestore(&priv->lock, flags);
1937 priv->thermal_throttle.ct_kill_toggle = false;
1938
1939 if (priv->cfg->base_params->support_ct_kill_exit) {
1940 adv_cmd.critical_temperature_enter =
1941 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1942 adv_cmd.critical_temperature_exit =
1943 cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1944
1945 ret = trans_send_cmd_pdu(priv,
1946 REPLY_CT_KILL_CONFIG_CMD,
1947 CMD_SYNC, sizeof(adv_cmd), &adv_cmd);
1948 if (ret)
1949 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1950 else
1951 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1952 "succeeded, "
1953 "critical temperature enter is %d,"
1954 "exit is %d\n",
1955 priv->hw_params.ct_kill_threshold,
1956 priv->hw_params.ct_kill_exit_threshold);
1957 } else {
1958 cmd.critical_temperature_R =
1959 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1960
1961 ret = trans_send_cmd_pdu(priv,
1962 REPLY_CT_KILL_CONFIG_CMD,
1963 CMD_SYNC, sizeof(cmd), &cmd);
1964 if (ret)
1965 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1966 else
1967 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1968 "succeeded, "
1969 "critical temperature is %d\n",
1970 priv->hw_params.ct_kill_threshold);
1971 }
1972 }
1973
1974 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
1975 {
1976 struct iwl_calib_cfg_cmd calib_cfg_cmd;
1977 struct iwl_host_cmd cmd = {
1978 .id = CALIBRATION_CFG_CMD,
1979 .len = { sizeof(struct iwl_calib_cfg_cmd), },
1980 .data = { &calib_cfg_cmd, },
1981 };
1982
1983 memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
1984 calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_INIT_CFG_ALL;
1985 calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
1986
1987 return trans_send_cmd(priv, &cmd);
1988 }
1989
1990
1991 /**
1992 * iwl_alive_start - called after REPLY_ALIVE notification received
1993 * from protocol/runtime uCode (initialization uCode's
1994 * Alive gets handled by iwl_init_alive_start()).
1995 */
1996 int iwl_alive_start(struct iwl_priv *priv)
1997 {
1998 int ret = 0;
1999 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2000
2001 iwl_reset_ict(priv);
2002
2003 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2004
2005 /* After the ALIVE response, we can send host commands to the uCode */
2006 set_bit(STATUS_ALIVE, &priv->status);
2007
2008 /* Enable watchdog to monitor the driver tx queues */
2009 iwl_setup_watchdog(priv);
2010
2011 if (iwl_is_rfkill(priv))
2012 return -ERFKILL;
2013
2014 /* download priority table before any calibration request */
2015 if (priv->cfg->bt_params &&
2016 priv->cfg->bt_params->advanced_bt_coexist) {
2017 /* Configure Bluetooth device coexistence support */
2018 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
2019 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
2020 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
2021 iwlagn_send_advance_bt_config(priv);
2022 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
2023 iwlagn_send_prio_tbl(priv);
2024
2025 /* FIXME: w/a to force change uCode BT state machine */
2026 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
2027 BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2028 if (ret)
2029 return ret;
2030 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
2031 BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2032 if (ret)
2033 return ret;
2034 } else {
2035 /*
2036 * default is 2-wire BT coexexistence support
2037 */
2038 iwl_send_bt_config(priv);
2039 }
2040
2041 if (priv->hw_params.calib_rt_cfg)
2042 iwlagn_send_calib_cfg_rt(priv, priv->hw_params.calib_rt_cfg);
2043
2044 ieee80211_wake_queues(priv->hw);
2045
2046 priv->active_rate = IWL_RATES_MASK;
2047
2048 /* Configure Tx antenna selection based on H/W config */
2049 iwlagn_send_tx_ant_config(priv, priv->cfg->valid_tx_ant);
2050
2051 if (iwl_is_associated_ctx(ctx)) {
2052 struct iwl_rxon_cmd *active_rxon =
2053 (struct iwl_rxon_cmd *)&ctx->active;
2054 /* apply any changes in staging */
2055 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2056 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2057 } else {
2058 struct iwl_rxon_context *tmp;
2059 /* Initialize our rx_config data */
2060 for_each_context(priv, tmp)
2061 iwl_connection_init_rx_config(priv, tmp);
2062
2063 iwlagn_set_rxon_chain(priv, ctx);
2064 }
2065
2066 iwl_reset_run_time_calib(priv);
2067
2068 set_bit(STATUS_READY, &priv->status);
2069
2070 /* Configure the adapter for unassociated operation */
2071 ret = iwlagn_commit_rxon(priv, ctx);
2072 if (ret)
2073 return ret;
2074
2075 /* At this point, the NIC is initialized and operational */
2076 iwl_rf_kill_ct_config(priv);
2077
2078 IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2079
2080 return iwl_power_update_mode(priv, true);
2081 }
2082
2083 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2084
2085 static void __iwl_down(struct iwl_priv *priv)
2086 {
2087 int exit_pending;
2088
2089 IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2090
2091 iwl_scan_cancel_timeout(priv, 200);
2092
2093 exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
2094
2095 /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
2096 * to prevent rearm timer */
2097 del_timer_sync(&priv->watchdog);
2098
2099 iwl_clear_ucode_stations(priv, NULL);
2100 iwl_dealloc_bcast_stations(priv);
2101 iwl_clear_driver_stations(priv);
2102
2103 /* reset BT coex data */
2104 priv->bt_status = 0;
2105 if (priv->cfg->bt_params)
2106 priv->bt_traffic_load =
2107 priv->cfg->bt_params->bt_init_traffic_load;
2108 else
2109 priv->bt_traffic_load = 0;
2110 priv->bt_full_concurrent = false;
2111 priv->bt_ci_compliance = 0;
2112
2113 /* Wipe out the EXIT_PENDING status bit if we are not actually
2114 * exiting the module */
2115 if (!exit_pending)
2116 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2117
2118 if (priv->mac80211_registered)
2119 ieee80211_stop_queues(priv->hw);
2120
2121 /* Clear out all status bits but a few that are stable across reset */
2122 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2123 STATUS_RF_KILL_HW |
2124 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2125 STATUS_GEO_CONFIGURED |
2126 test_bit(STATUS_FW_ERROR, &priv->status) <<
2127 STATUS_FW_ERROR |
2128 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2129 STATUS_EXIT_PENDING;
2130
2131 iwlagn_stop_device(priv);
2132
2133 dev_kfree_skb(priv->beacon_skb);
2134 priv->beacon_skb = NULL;
2135 }
2136
2137 static void iwl_down(struct iwl_priv *priv)
2138 {
2139 mutex_lock(&priv->mutex);
2140 __iwl_down(priv);
2141 mutex_unlock(&priv->mutex);
2142
2143 iwl_cancel_deferred_work(priv);
2144 }
2145
2146 #define HW_READY_TIMEOUT (50)
2147
2148 /* Note: returns poll_bit return value, which is >= 0 if success */
2149 static int iwl_set_hw_ready(struct iwl_priv *priv)
2150 {
2151 int ret;
2152
2153 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2154 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2155
2156 /* See if we got it */
2157 ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2158 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2159 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2160 HW_READY_TIMEOUT);
2161
2162 IWL_DEBUG_INFO(priv, "hardware%s ready\n", ret < 0 ? " not" : "");
2163 return ret;
2164 }
2165
2166 /* Note: returns standard 0/-ERROR code */
2167 int iwl_prepare_card_hw(struct iwl_priv *priv)
2168 {
2169 int ret;
2170
2171 IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter\n");
2172
2173 ret = iwl_set_hw_ready(priv);
2174 if (ret >= 0)
2175 return 0;
2176
2177 /* If HW is not ready, prepare the conditions to check again */
2178 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2179 CSR_HW_IF_CONFIG_REG_PREPARE);
2180
2181 ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2182 ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2183 CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2184
2185 if (ret < 0)
2186 return ret;
2187
2188 /* HW should be ready by now, check again. */
2189 ret = iwl_set_hw_ready(priv);
2190 if (ret >= 0)
2191 return 0;
2192 return ret;
2193 }
2194
2195 #define MAX_HW_RESTARTS 5
2196
2197 static int __iwl_up(struct iwl_priv *priv)
2198 {
2199 struct iwl_rxon_context *ctx;
2200 int ret;
2201
2202 lockdep_assert_held(&priv->mutex);
2203
2204 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2205 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2206 return -EIO;
2207 }
2208
2209 for_each_context(priv, ctx) {
2210 ret = iwlagn_alloc_bcast_station(priv, ctx);
2211 if (ret) {
2212 iwl_dealloc_bcast_stations(priv);
2213 return ret;
2214 }
2215 }
2216
2217 ret = iwlagn_run_init_ucode(priv);
2218 if (ret) {
2219 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
2220 goto error;
2221 }
2222
2223 ret = iwlagn_load_ucode_wait_alive(priv,
2224 &priv->ucode_rt,
2225 IWL_UCODE_REGULAR);
2226 if (ret) {
2227 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
2228 goto error;
2229 }
2230
2231 ret = iwl_alive_start(priv);
2232 if (ret)
2233 goto error;
2234 return 0;
2235
2236 error:
2237 set_bit(STATUS_EXIT_PENDING, &priv->status);
2238 __iwl_down(priv);
2239 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2240
2241 IWL_ERR(priv, "Unable to initialize device.\n");
2242 return ret;
2243 }
2244
2245
2246 /*****************************************************************************
2247 *
2248 * Workqueue callbacks
2249 *
2250 *****************************************************************************/
2251
2252 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2253 {
2254 struct iwl_priv *priv = container_of(work, struct iwl_priv,
2255 run_time_calib_work);
2256
2257 mutex_lock(&priv->mutex);
2258
2259 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2260 test_bit(STATUS_SCANNING, &priv->status)) {
2261 mutex_unlock(&priv->mutex);
2262 return;
2263 }
2264
2265 if (priv->start_calib) {
2266 iwl_chain_noise_calibration(priv);
2267 iwl_sensitivity_calibration(priv);
2268 }
2269
2270 mutex_unlock(&priv->mutex);
2271 }
2272
2273 static void iwlagn_prepare_restart(struct iwl_priv *priv)
2274 {
2275 struct iwl_rxon_context *ctx;
2276 bool bt_full_concurrent;
2277 u8 bt_ci_compliance;
2278 u8 bt_load;
2279 u8 bt_status;
2280
2281 lockdep_assert_held(&priv->mutex);
2282
2283 for_each_context(priv, ctx)
2284 ctx->vif = NULL;
2285 priv->is_open = 0;
2286
2287 /*
2288 * __iwl_down() will clear the BT status variables,
2289 * which is correct, but when we restart we really
2290 * want to keep them so restore them afterwards.
2291 *
2292 * The restart process will later pick them up and
2293 * re-configure the hw when we reconfigure the BT
2294 * command.
2295 */
2296 bt_full_concurrent = priv->bt_full_concurrent;
2297 bt_ci_compliance = priv->bt_ci_compliance;
2298 bt_load = priv->bt_traffic_load;
2299 bt_status = priv->bt_status;
2300
2301 __iwl_down(priv);
2302
2303 priv->bt_full_concurrent = bt_full_concurrent;
2304 priv->bt_ci_compliance = bt_ci_compliance;
2305 priv->bt_traffic_load = bt_load;
2306 priv->bt_status = bt_status;
2307 }
2308
2309 static void iwl_bg_restart(struct work_struct *data)
2310 {
2311 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2312
2313 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2314 return;
2315
2316 if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2317 mutex_lock(&priv->mutex);
2318 iwlagn_prepare_restart(priv);
2319 mutex_unlock(&priv->mutex);
2320 iwl_cancel_deferred_work(priv);
2321 ieee80211_restart_hw(priv->hw);
2322 } else {
2323 WARN_ON(1);
2324 }
2325 }
2326
2327 static void iwl_bg_rx_replenish(struct work_struct *data)
2328 {
2329 struct iwl_priv *priv =
2330 container_of(data, struct iwl_priv, rx_replenish);
2331
2332 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2333 return;
2334
2335 mutex_lock(&priv->mutex);
2336 iwlagn_rx_replenish(priv);
2337 mutex_unlock(&priv->mutex);
2338 }
2339
2340 static int iwl_mac_offchannel_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
2341 struct ieee80211_channel *chan,
2342 enum nl80211_channel_type channel_type,
2343 unsigned int wait)
2344 {
2345 struct iwl_priv *priv = hw->priv;
2346 int ret;
2347
2348 /* Not supported if we don't have PAN */
2349 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) {
2350 ret = -EOPNOTSUPP;
2351 goto free;
2352 }
2353
2354 /* Not supported on pre-P2P firmware */
2355 if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
2356 BIT(NL80211_IFTYPE_P2P_CLIENT))) {
2357 ret = -EOPNOTSUPP;
2358 goto free;
2359 }
2360
2361 mutex_lock(&priv->mutex);
2362
2363 if (!priv->contexts[IWL_RXON_CTX_PAN].is_active) {
2364 /*
2365 * If the PAN context is free, use the normal
2366 * way of doing remain-on-channel offload + TX.
2367 */
2368 ret = 1;
2369 goto out;
2370 }
2371
2372 /* TODO: queue up if scanning? */
2373 if (test_bit(STATUS_SCANNING, &priv->status) ||
2374 priv->_agn.offchan_tx_skb) {
2375 ret = -EBUSY;
2376 goto out;
2377 }
2378
2379 /*
2380 * max_scan_ie_len doesn't include the blank SSID or the header,
2381 * so need to add that again here.
2382 */
2383 if (skb->len > hw->wiphy->max_scan_ie_len + 24 + 2) {
2384 ret = -ENOBUFS;
2385 goto out;
2386 }
2387
2388 priv->_agn.offchan_tx_skb = skb;
2389 priv->_agn.offchan_tx_timeout = wait;
2390 priv->_agn.offchan_tx_chan = chan;
2391
2392 ret = iwl_scan_initiate(priv, priv->contexts[IWL_RXON_CTX_PAN].vif,
2393 IWL_SCAN_OFFCH_TX, chan->band);
2394 if (ret)
2395 priv->_agn.offchan_tx_skb = NULL;
2396 out:
2397 mutex_unlock(&priv->mutex);
2398 free:
2399 if (ret < 0)
2400 kfree_skb(skb);
2401
2402 return ret;
2403 }
2404
2405 static int iwl_mac_offchannel_tx_cancel_wait(struct ieee80211_hw *hw)
2406 {
2407 struct iwl_priv *priv = hw->priv;
2408 int ret;
2409
2410 mutex_lock(&priv->mutex);
2411
2412 if (!priv->_agn.offchan_tx_skb) {
2413 ret = -EINVAL;
2414 goto unlock;
2415 }
2416
2417 priv->_agn.offchan_tx_skb = NULL;
2418
2419 ret = iwl_scan_cancel_timeout(priv, 200);
2420 if (ret)
2421 ret = -EIO;
2422 unlock:
2423 mutex_unlock(&priv->mutex);
2424
2425 return ret;
2426 }
2427
2428 /*****************************************************************************
2429 *
2430 * mac80211 entry point functions
2431 *
2432 *****************************************************************************/
2433
2434 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
2435 {
2436 .max = 1,
2437 .types = BIT(NL80211_IFTYPE_STATION),
2438 },
2439 {
2440 .max = 1,
2441 .types = BIT(NL80211_IFTYPE_AP),
2442 },
2443 };
2444
2445 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
2446 {
2447 .max = 2,
2448 .types = BIT(NL80211_IFTYPE_STATION),
2449 },
2450 };
2451
2452 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
2453 {
2454 .max = 1,
2455 .types = BIT(NL80211_IFTYPE_STATION),
2456 },
2457 {
2458 .max = 1,
2459 .types = BIT(NL80211_IFTYPE_P2P_GO) |
2460 BIT(NL80211_IFTYPE_AP),
2461 },
2462 };
2463
2464 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
2465 {
2466 .max = 2,
2467 .types = BIT(NL80211_IFTYPE_STATION),
2468 },
2469 {
2470 .max = 1,
2471 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
2472 },
2473 };
2474
2475 static const struct ieee80211_iface_combination
2476 iwlagn_iface_combinations_dualmode[] = {
2477 { .num_different_channels = 1,
2478 .max_interfaces = 2,
2479 .beacon_int_infra_match = true,
2480 .limits = iwlagn_sta_ap_limits,
2481 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
2482 },
2483 { .num_different_channels = 1,
2484 .max_interfaces = 2,
2485 .limits = iwlagn_2sta_limits,
2486 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
2487 },
2488 };
2489
2490 static const struct ieee80211_iface_combination
2491 iwlagn_iface_combinations_p2p[] = {
2492 { .num_different_channels = 1,
2493 .max_interfaces = 2,
2494 .beacon_int_infra_match = true,
2495 .limits = iwlagn_p2p_sta_go_limits,
2496 .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
2497 },
2498 { .num_different_channels = 1,
2499 .max_interfaces = 2,
2500 .limits = iwlagn_p2p_2sta_limits,
2501 .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
2502 },
2503 };
2504
2505 /*
2506 * Not a mac80211 entry point function, but it fits in with all the
2507 * other mac80211 functions grouped here.
2508 */
2509 static int iwl_mac_setup_register(struct iwl_priv *priv,
2510 struct iwlagn_ucode_capabilities *capa)
2511 {
2512 int ret;
2513 struct ieee80211_hw *hw = priv->hw;
2514 struct iwl_rxon_context *ctx;
2515
2516 hw->rate_control_algorithm = "iwl-agn-rs";
2517
2518 /* Tell mac80211 our characteristics */
2519 hw->flags = IEEE80211_HW_SIGNAL_DBM |
2520 IEEE80211_HW_AMPDU_AGGREGATION |
2521 IEEE80211_HW_NEED_DTIM_PERIOD |
2522 IEEE80211_HW_SPECTRUM_MGMT |
2523 IEEE80211_HW_REPORTS_TX_ACK_STATUS;
2524
2525 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2526
2527 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2528 IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2529
2530 if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
2531 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
2532 IEEE80211_HW_SUPPORTS_STATIC_SMPS;
2533
2534 if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
2535 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
2536
2537 hw->sta_data_size = sizeof(struct iwl_station_priv);
2538 hw->vif_data_size = sizeof(struct iwl_vif_priv);
2539
2540 for_each_context(priv, ctx) {
2541 hw->wiphy->interface_modes |= ctx->interface_modes;
2542 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
2543 }
2544
2545 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
2546
2547 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
2548 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
2549 hw->wiphy->n_iface_combinations =
2550 ARRAY_SIZE(iwlagn_iface_combinations_p2p);
2551 } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
2552 hw->wiphy->iface_combinations = iwlagn_iface_combinations_dualmode;
2553 hw->wiphy->n_iface_combinations =
2554 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
2555 }
2556
2557 hw->wiphy->max_remain_on_channel_duration = 1000;
2558
2559 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
2560 WIPHY_FLAG_DISABLE_BEACON_HINTS |
2561 WIPHY_FLAG_IBSS_RSN;
2562
2563 if (iwlagn_mod_params.power_save)
2564 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
2565 else
2566 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2567
2568 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
2569 /* we create the 802.11 header and a zero-length SSID element */
2570 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
2571
2572 /* Default value; 4 EDCA QOS priorities */
2573 hw->queues = 4;
2574
2575 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2576
2577 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2578 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2579 &priv->bands[IEEE80211_BAND_2GHZ];
2580 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2581 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2582 &priv->bands[IEEE80211_BAND_5GHZ];
2583
2584 iwl_leds_init(priv);
2585
2586 ret = ieee80211_register_hw(priv->hw);
2587 if (ret) {
2588 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2589 return ret;
2590 }
2591 priv->mac80211_registered = 1;
2592
2593 return 0;
2594 }
2595
2596
2597 static int iwlagn_mac_start(struct ieee80211_hw *hw)
2598 {
2599 struct iwl_priv *priv = hw->priv;
2600 int ret;
2601
2602 IWL_DEBUG_MAC80211(priv, "enter\n");
2603
2604 /* we should be verifying the device is ready to be opened */
2605 mutex_lock(&priv->mutex);
2606 ret = __iwl_up(priv);
2607 mutex_unlock(&priv->mutex);
2608 if (ret)
2609 return ret;
2610
2611 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2612
2613 /* Now we should be done, and the READY bit should be set. */
2614 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
2615 ret = -EIO;
2616
2617 iwlagn_led_enable(priv);
2618
2619 priv->is_open = 1;
2620 IWL_DEBUG_MAC80211(priv, "leave\n");
2621 return 0;
2622 }
2623
2624 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
2625 {
2626 struct iwl_priv *priv = hw->priv;
2627
2628 IWL_DEBUG_MAC80211(priv, "enter\n");
2629
2630 if (!priv->is_open)
2631 return;
2632
2633 priv->is_open = 0;
2634
2635 iwl_down(priv);
2636
2637 flush_workqueue(priv->workqueue);
2638
2639 /* User space software may expect getting rfkill changes
2640 * even if interface is down */
2641 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2642 iwl_enable_rfkill_int(priv);
2643
2644 IWL_DEBUG_MAC80211(priv, "leave\n");
2645 }
2646
2647 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2648 {
2649 struct iwl_priv *priv = hw->priv;
2650
2651 IWL_DEBUG_MACDUMP(priv, "enter\n");
2652
2653 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2654 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2655
2656 if (iwlagn_tx_skb(priv, skb))
2657 dev_kfree_skb_any(skb);
2658
2659 IWL_DEBUG_MACDUMP(priv, "leave\n");
2660 }
2661
2662 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
2663 struct ieee80211_vif *vif,
2664 struct ieee80211_key_conf *keyconf,
2665 struct ieee80211_sta *sta,
2666 u32 iv32, u16 *phase1key)
2667 {
2668 struct iwl_priv *priv = hw->priv;
2669 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2670
2671 IWL_DEBUG_MAC80211(priv, "enter\n");
2672
2673 iwl_update_tkip_key(priv, vif_priv->ctx, keyconf, sta,
2674 iv32, phase1key);
2675
2676 IWL_DEBUG_MAC80211(priv, "leave\n");
2677 }
2678
2679 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2680 struct ieee80211_vif *vif,
2681 struct ieee80211_sta *sta,
2682 struct ieee80211_key_conf *key)
2683 {
2684 struct iwl_priv *priv = hw->priv;
2685 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2686 struct iwl_rxon_context *ctx = vif_priv->ctx;
2687 int ret;
2688 u8 sta_id;
2689 bool is_default_wep_key = false;
2690
2691 IWL_DEBUG_MAC80211(priv, "enter\n");
2692
2693 if (iwlagn_mod_params.sw_crypto) {
2694 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2695 return -EOPNOTSUPP;
2696 }
2697
2698 /*
2699 * To support IBSS RSN, don't program group keys in IBSS, the
2700 * hardware will then not attempt to decrypt the frames.
2701 */
2702 if (vif->type == NL80211_IFTYPE_ADHOC &&
2703 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
2704 return -EOPNOTSUPP;
2705
2706 sta_id = iwl_sta_id_or_broadcast(priv, vif_priv->ctx, sta);
2707 if (sta_id == IWL_INVALID_STATION)
2708 return -EINVAL;
2709
2710 mutex_lock(&priv->mutex);
2711 iwl_scan_cancel_timeout(priv, 100);
2712
2713 /*
2714 * If we are getting WEP group key and we didn't receive any key mapping
2715 * so far, we are in legacy wep mode (group key only), otherwise we are
2716 * in 1X mode.
2717 * In legacy wep mode, we use another host command to the uCode.
2718 */
2719 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2720 key->cipher == WLAN_CIPHER_SUITE_WEP104) &&
2721 !sta) {
2722 if (cmd == SET_KEY)
2723 is_default_wep_key = !ctx->key_mapping_keys;
2724 else
2725 is_default_wep_key =
2726 (key->hw_key_idx == HW_KEY_DEFAULT);
2727 }
2728
2729 switch (cmd) {
2730 case SET_KEY:
2731 if (is_default_wep_key)
2732 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
2733 else
2734 ret = iwl_set_dynamic_key(priv, vif_priv->ctx,
2735 key, sta_id);
2736
2737 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2738 break;
2739 case DISABLE_KEY:
2740 if (is_default_wep_key)
2741 ret = iwl_remove_default_wep_key(priv, ctx, key);
2742 else
2743 ret = iwl_remove_dynamic_key(priv, ctx, key, sta_id);
2744
2745 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2746 break;
2747 default:
2748 ret = -EINVAL;
2749 }
2750
2751 mutex_unlock(&priv->mutex);
2752 IWL_DEBUG_MAC80211(priv, "leave\n");
2753
2754 return ret;
2755 }
2756
2757 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
2758 struct ieee80211_vif *vif,
2759 enum ieee80211_ampdu_mlme_action action,
2760 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
2761 u8 buf_size)
2762 {
2763 struct iwl_priv *priv = hw->priv;
2764 int ret = -EINVAL;
2765 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
2766
2767 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2768 sta->addr, tid);
2769
2770 if (!(priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE))
2771 return -EACCES;
2772
2773 mutex_lock(&priv->mutex);
2774
2775 switch (action) {
2776 case IEEE80211_AMPDU_RX_START:
2777 IWL_DEBUG_HT(priv, "start Rx\n");
2778 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
2779 break;
2780 case IEEE80211_AMPDU_RX_STOP:
2781 IWL_DEBUG_HT(priv, "stop Rx\n");
2782 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
2783 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2784 ret = 0;
2785 break;
2786 case IEEE80211_AMPDU_TX_START:
2787 IWL_DEBUG_HT(priv, "start Tx\n");
2788 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
2789 if (ret == 0) {
2790 priv->_agn.agg_tids_count++;
2791 IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2792 priv->_agn.agg_tids_count);
2793 }
2794 break;
2795 case IEEE80211_AMPDU_TX_STOP:
2796 IWL_DEBUG_HT(priv, "stop Tx\n");
2797 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
2798 if ((ret == 0) && (priv->_agn.agg_tids_count > 0)) {
2799 priv->_agn.agg_tids_count--;
2800 IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2801 priv->_agn.agg_tids_count);
2802 }
2803 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2804 ret = 0;
2805 if (priv->cfg->ht_params &&
2806 priv->cfg->ht_params->use_rts_for_aggregation) {
2807 /*
2808 * switch off RTS/CTS if it was previously enabled
2809 */
2810 sta_priv->lq_sta.lq.general_params.flags &=
2811 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2812 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2813 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2814 }
2815 break;
2816 case IEEE80211_AMPDU_TX_OPERATIONAL:
2817 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2818
2819 iwlagn_txq_agg_queue_setup(priv, sta, tid, buf_size);
2820
2821 /*
2822 * If the limit is 0, then it wasn't initialised yet,
2823 * use the default. We can do that since we take the
2824 * minimum below, and we don't want to go above our
2825 * default due to hardware restrictions.
2826 */
2827 if (sta_priv->max_agg_bufsize == 0)
2828 sta_priv->max_agg_bufsize =
2829 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2830
2831 /*
2832 * Even though in theory the peer could have different
2833 * aggregation reorder buffer sizes for different sessions,
2834 * our ucode doesn't allow for that and has a global limit
2835 * for each station. Therefore, use the minimum of all the
2836 * aggregation sessions and our default value.
2837 */
2838 sta_priv->max_agg_bufsize =
2839 min(sta_priv->max_agg_bufsize, buf_size);
2840
2841 if (priv->cfg->ht_params &&
2842 priv->cfg->ht_params->use_rts_for_aggregation) {
2843 /*
2844 * switch to RTS/CTS if it is the prefer protection
2845 * method for HT traffic
2846 */
2847
2848 sta_priv->lq_sta.lq.general_params.flags |=
2849 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2850 }
2851
2852 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
2853 sta_priv->max_agg_bufsize;
2854
2855 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2856 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2857
2858 IWL_INFO(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
2859 sta->addr, tid);
2860 ret = 0;
2861 break;
2862 }
2863 mutex_unlock(&priv->mutex);
2864
2865 return ret;
2866 }
2867
2868 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
2869 struct ieee80211_vif *vif,
2870 struct ieee80211_sta *sta)
2871 {
2872 struct iwl_priv *priv = hw->priv;
2873 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2874 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2875 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
2876 int ret;
2877 u8 sta_id;
2878
2879 IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
2880 sta->addr);
2881 mutex_lock(&priv->mutex);
2882 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
2883 sta->addr);
2884 sta_priv->common.sta_id = IWL_INVALID_STATION;
2885
2886 atomic_set(&sta_priv->pending_frames, 0);
2887 if (vif->type == NL80211_IFTYPE_AP)
2888 sta_priv->client = true;
2889
2890 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
2891 is_ap, sta, &sta_id);
2892 if (ret) {
2893 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
2894 sta->addr, ret);
2895 /* Should we return success if return code is EEXIST ? */
2896 mutex_unlock(&priv->mutex);
2897 return ret;
2898 }
2899
2900 sta_priv->common.sta_id = sta_id;
2901
2902 /* Initialize rate scaling */
2903 IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
2904 sta->addr);
2905 iwl_rs_rate_init(priv, sta, sta_id);
2906 mutex_unlock(&priv->mutex);
2907
2908 return 0;
2909 }
2910
2911 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
2912 struct ieee80211_channel_switch *ch_switch)
2913 {
2914 struct iwl_priv *priv = hw->priv;
2915 const struct iwl_channel_info *ch_info;
2916 struct ieee80211_conf *conf = &hw->conf;
2917 struct ieee80211_channel *channel = ch_switch->channel;
2918 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2919 /*
2920 * MULTI-FIXME
2921 * When we add support for multiple interfaces, we need to
2922 * revisit this. The channel switch command in the device
2923 * only affects the BSS context, but what does that really
2924 * mean? And what if we get a CSA on the second interface?
2925 * This needs a lot of work.
2926 */
2927 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2928 u16 ch;
2929
2930 IWL_DEBUG_MAC80211(priv, "enter\n");
2931
2932 mutex_lock(&priv->mutex);
2933
2934 if (iwl_is_rfkill(priv))
2935 goto out;
2936
2937 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2938 test_bit(STATUS_SCANNING, &priv->status) ||
2939 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
2940 goto out;
2941
2942 if (!iwl_is_associated_ctx(ctx))
2943 goto out;
2944
2945 if (!priv->cfg->ops->lib->set_channel_switch)
2946 goto out;
2947
2948 ch = channel->hw_value;
2949 if (le16_to_cpu(ctx->active.channel) == ch)
2950 goto out;
2951
2952 ch_info = iwl_get_channel_info(priv, channel->band, ch);
2953 if (!is_channel_valid(ch_info)) {
2954 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
2955 goto out;
2956 }
2957
2958 spin_lock_irq(&priv->lock);
2959
2960 priv->current_ht_config.smps = conf->smps_mode;
2961
2962 /* Configure HT40 channels */
2963 ctx->ht.enabled = conf_is_ht(conf);
2964 if (ctx->ht.enabled) {
2965 if (conf_is_ht40_minus(conf)) {
2966 ctx->ht.extension_chan_offset =
2967 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2968 ctx->ht.is_40mhz = true;
2969 } else if (conf_is_ht40_plus(conf)) {
2970 ctx->ht.extension_chan_offset =
2971 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2972 ctx->ht.is_40mhz = true;
2973 } else {
2974 ctx->ht.extension_chan_offset =
2975 IEEE80211_HT_PARAM_CHA_SEC_NONE;
2976 ctx->ht.is_40mhz = false;
2977 }
2978 } else
2979 ctx->ht.is_40mhz = false;
2980
2981 if ((le16_to_cpu(ctx->staging.channel) != ch))
2982 ctx->staging.flags = 0;
2983
2984 iwl_set_rxon_channel(priv, channel, ctx);
2985 iwl_set_rxon_ht(priv, ht_conf);
2986 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
2987
2988 spin_unlock_irq(&priv->lock);
2989
2990 iwl_set_rate(priv);
2991 /*
2992 * at this point, staging_rxon has the
2993 * configuration for channel switch
2994 */
2995 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
2996 priv->switch_channel = cpu_to_le16(ch);
2997 if (priv->cfg->ops->lib->set_channel_switch(priv, ch_switch)) {
2998 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
2999 priv->switch_channel = 0;
3000 ieee80211_chswitch_done(ctx->vif, false);
3001 }
3002
3003 out:
3004 mutex_unlock(&priv->mutex);
3005 IWL_DEBUG_MAC80211(priv, "leave\n");
3006 }
3007
3008 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
3009 unsigned int changed_flags,
3010 unsigned int *total_flags,
3011 u64 multicast)
3012 {
3013 struct iwl_priv *priv = hw->priv;
3014 __le32 filter_or = 0, filter_nand = 0;
3015 struct iwl_rxon_context *ctx;
3016
3017 #define CHK(test, flag) do { \
3018 if (*total_flags & (test)) \
3019 filter_or |= (flag); \
3020 else \
3021 filter_nand |= (flag); \
3022 } while (0)
3023
3024 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
3025 changed_flags, *total_flags);
3026
3027 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
3028 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
3029 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
3030 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3031
3032 #undef CHK
3033
3034 mutex_lock(&priv->mutex);
3035
3036 for_each_context(priv, ctx) {
3037 ctx->staging.filter_flags &= ~filter_nand;
3038 ctx->staging.filter_flags |= filter_or;
3039
3040 /*
3041 * Not committing directly because hardware can perform a scan,
3042 * but we'll eventually commit the filter flags change anyway.
3043 */
3044 }
3045
3046 mutex_unlock(&priv->mutex);
3047
3048 /*
3049 * Receiving all multicast frames is always enabled by the
3050 * default flags setup in iwl_connection_init_rx_config()
3051 * since we currently do not support programming multicast
3052 * filters into the device.
3053 */
3054 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
3055 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3056 }
3057
3058 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
3059 {
3060 struct iwl_priv *priv = hw->priv;
3061
3062 mutex_lock(&priv->mutex);
3063 IWL_DEBUG_MAC80211(priv, "enter\n");
3064
3065 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3066 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
3067 goto done;
3068 }
3069 if (iwl_is_rfkill(priv)) {
3070 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
3071 goto done;
3072 }
3073
3074 /*
3075 * mac80211 will not push any more frames for transmit
3076 * until the flush is completed
3077 */
3078 if (drop) {
3079 IWL_DEBUG_MAC80211(priv, "send flush command\n");
3080 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
3081 IWL_ERR(priv, "flush request fail\n");
3082 goto done;
3083 }
3084 }
3085 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
3086 iwlagn_wait_tx_queue_empty(priv);
3087 done:
3088 mutex_unlock(&priv->mutex);
3089 IWL_DEBUG_MAC80211(priv, "leave\n");
3090 }
3091
3092 static void iwlagn_disable_roc(struct iwl_priv *priv)
3093 {
3094 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
3095 struct ieee80211_channel *chan = ACCESS_ONCE(priv->hw->conf.channel);
3096
3097 lockdep_assert_held(&priv->mutex);
3098
3099 if (!ctx->is_active)
3100 return;
3101
3102 ctx->staging.dev_type = RXON_DEV_TYPE_2STA;
3103 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3104 iwl_set_rxon_channel(priv, chan, ctx);
3105 iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
3106
3107 priv->_agn.hw_roc_channel = NULL;
3108
3109 iwlagn_commit_rxon(priv, ctx);
3110
3111 ctx->is_active = false;
3112 }
3113
3114 static void iwlagn_bg_roc_done(struct work_struct *work)
3115 {
3116 struct iwl_priv *priv = container_of(work, struct iwl_priv,
3117 _agn.hw_roc_work.work);
3118
3119 mutex_lock(&priv->mutex);
3120 ieee80211_remain_on_channel_expired(priv->hw);
3121 iwlagn_disable_roc(priv);
3122 mutex_unlock(&priv->mutex);
3123 }
3124
3125 static int iwl_mac_remain_on_channel(struct ieee80211_hw *hw,
3126 struct ieee80211_channel *channel,
3127 enum nl80211_channel_type channel_type,
3128 int duration)
3129 {
3130 struct iwl_priv *priv = hw->priv;
3131 int err = 0;
3132
3133 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
3134 return -EOPNOTSUPP;
3135
3136 if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
3137 BIT(NL80211_IFTYPE_P2P_CLIENT)))
3138 return -EOPNOTSUPP;
3139
3140 mutex_lock(&priv->mutex);
3141
3142 if (priv->contexts[IWL_RXON_CTX_PAN].is_active ||
3143 test_bit(STATUS_SCAN_HW, &priv->status)) {
3144 err = -EBUSY;
3145 goto out;
3146 }
3147
3148 priv->contexts[IWL_RXON_CTX_PAN].is_active = true;
3149 priv->_agn.hw_roc_channel = channel;
3150 priv->_agn.hw_roc_chantype = channel_type;
3151 priv->_agn.hw_roc_duration = DIV_ROUND_UP(duration * 1000, 1024);
3152 iwlagn_commit_rxon(priv, &priv->contexts[IWL_RXON_CTX_PAN]);
3153 queue_delayed_work(priv->workqueue, &priv->_agn.hw_roc_work,
3154 msecs_to_jiffies(duration + 20));
3155
3156 msleep(IWL_MIN_SLOT_TIME); /* TU is almost ms */
3157 ieee80211_ready_on_channel(priv->hw);
3158
3159 out:
3160 mutex_unlock(&priv->mutex);
3161
3162 return err;
3163 }
3164
3165 static int iwl_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
3166 {
3167 struct iwl_priv *priv = hw->priv;
3168
3169 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
3170 return -EOPNOTSUPP;
3171
3172 cancel_delayed_work_sync(&priv->_agn.hw_roc_work);
3173
3174 mutex_lock(&priv->mutex);
3175 iwlagn_disable_roc(priv);
3176 mutex_unlock(&priv->mutex);
3177
3178 return 0;
3179 }
3180
3181 /*****************************************************************************
3182 *
3183 * driver setup and teardown
3184 *
3185 *****************************************************************************/
3186
3187 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3188 {
3189 priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3190
3191 init_waitqueue_head(&priv->wait_command_queue);
3192
3193 INIT_WORK(&priv->restart, iwl_bg_restart);
3194 INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3195 INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3196 INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3197 INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
3198 INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
3199 INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
3200 INIT_DELAYED_WORK(&priv->_agn.hw_roc_work, iwlagn_bg_roc_done);
3201
3202 iwl_setup_scan_deferred_work(priv);
3203
3204 if (priv->cfg->ops->lib->setup_deferred_work)
3205 priv->cfg->ops->lib->setup_deferred_work(priv);
3206
3207 init_timer(&priv->statistics_periodic);
3208 priv->statistics_periodic.data = (unsigned long)priv;
3209 priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3210
3211 init_timer(&priv->ucode_trace);
3212 priv->ucode_trace.data = (unsigned long)priv;
3213 priv->ucode_trace.function = iwl_bg_ucode_trace;
3214
3215 init_timer(&priv->watchdog);
3216 priv->watchdog.data = (unsigned long)priv;
3217 priv->watchdog.function = iwl_bg_watchdog;
3218
3219 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3220 iwl_irq_tasklet, (unsigned long)priv);
3221 }
3222
3223 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3224 {
3225 if (priv->cfg->ops->lib->cancel_deferred_work)
3226 priv->cfg->ops->lib->cancel_deferred_work(priv);
3227
3228 cancel_work_sync(&priv->run_time_calib_work);
3229 cancel_work_sync(&priv->beacon_update);
3230
3231 iwl_cancel_scan_deferred_work(priv);
3232
3233 cancel_work_sync(&priv->bt_full_concurrency);
3234 cancel_work_sync(&priv->bt_runtime_config);
3235
3236 del_timer_sync(&priv->statistics_periodic);
3237 del_timer_sync(&priv->ucode_trace);
3238 }
3239
3240 static void iwl_init_hw_rates(struct iwl_priv *priv,
3241 struct ieee80211_rate *rates)
3242 {
3243 int i;
3244
3245 for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
3246 rates[i].bitrate = iwl_rates[i].ieee * 5;
3247 rates[i].hw_value = i; /* Rate scaling will work on indexes */
3248 rates[i].hw_value_short = i;
3249 rates[i].flags = 0;
3250 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
3251 /*
3252 * If CCK != 1M then set short preamble rate flag.
3253 */
3254 rates[i].flags |=
3255 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
3256 0 : IEEE80211_RATE_SHORT_PREAMBLE;
3257 }
3258 }
3259 }
3260
3261 static int iwl_init_drv(struct iwl_priv *priv)
3262 {
3263 int ret;
3264
3265 spin_lock_init(&priv->sta_lock);
3266 spin_lock_init(&priv->hcmd_lock);
3267
3268 mutex_init(&priv->mutex);
3269
3270 priv->ieee_channels = NULL;
3271 priv->ieee_rates = NULL;
3272 priv->band = IEEE80211_BAND_2GHZ;
3273
3274 priv->iw_mode = NL80211_IFTYPE_STATION;
3275 priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
3276 priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3277 priv->_agn.agg_tids_count = 0;
3278
3279 /* initialize force reset */
3280 priv->force_reset[IWL_RF_RESET].reset_duration =
3281 IWL_DELAY_NEXT_FORCE_RF_RESET;
3282 priv->force_reset[IWL_FW_RESET].reset_duration =
3283 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
3284
3285 priv->rx_statistics_jiffies = jiffies;
3286
3287 /* Choose which receivers/antennas to use */
3288 iwlagn_set_rxon_chain(priv, &priv->contexts[IWL_RXON_CTX_BSS]);
3289
3290 iwl_init_scan_params(priv);
3291
3292 /* init bt coex */
3293 if (priv->cfg->bt_params &&
3294 priv->cfg->bt_params->advanced_bt_coexist) {
3295 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
3296 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
3297 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
3298 priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
3299 priv->bt_duration = BT_DURATION_LIMIT_DEF;
3300 priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
3301 }
3302
3303 ret = iwl_init_channel_map(priv);
3304 if (ret) {
3305 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3306 goto err;
3307 }
3308
3309 ret = iwlcore_init_geos(priv);
3310 if (ret) {
3311 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3312 goto err_free_channel_map;
3313 }
3314 iwl_init_hw_rates(priv, priv->ieee_rates);
3315
3316 return 0;
3317
3318 err_free_channel_map:
3319 iwl_free_channel_map(priv);
3320 err:
3321 return ret;
3322 }
3323
3324 static void iwl_uninit_drv(struct iwl_priv *priv)
3325 {
3326 iwl_calib_free_results(priv);
3327 iwlcore_free_geos(priv);
3328 iwl_free_channel_map(priv);
3329 kfree(priv->scan_cmd);
3330 kfree(priv->beacon_cmd);
3331 }
3332
3333 struct ieee80211_ops iwlagn_hw_ops = {
3334 .tx = iwlagn_mac_tx,
3335 .start = iwlagn_mac_start,
3336 .stop = iwlagn_mac_stop,
3337 .add_interface = iwl_mac_add_interface,
3338 .remove_interface = iwl_mac_remove_interface,
3339 .change_interface = iwl_mac_change_interface,
3340 .config = iwlagn_mac_config,
3341 .configure_filter = iwlagn_configure_filter,
3342 .set_key = iwlagn_mac_set_key,
3343 .update_tkip_key = iwlagn_mac_update_tkip_key,
3344 .conf_tx = iwl_mac_conf_tx,
3345 .bss_info_changed = iwlagn_bss_info_changed,
3346 .ampdu_action = iwlagn_mac_ampdu_action,
3347 .hw_scan = iwl_mac_hw_scan,
3348 .sta_notify = iwlagn_mac_sta_notify,
3349 .sta_add = iwlagn_mac_sta_add,
3350 .sta_remove = iwl_mac_sta_remove,
3351 .channel_switch = iwlagn_mac_channel_switch,
3352 .flush = iwlagn_mac_flush,
3353 .tx_last_beacon = iwl_mac_tx_last_beacon,
3354 .remain_on_channel = iwl_mac_remain_on_channel,
3355 .cancel_remain_on_channel = iwl_mac_cancel_remain_on_channel,
3356 .offchannel_tx = iwl_mac_offchannel_tx,
3357 .offchannel_tx_cancel_wait = iwl_mac_offchannel_tx_cancel_wait,
3358 CFG80211_TESTMODE_CMD(iwl_testmode_cmd)
3359 CFG80211_TESTMODE_DUMP(iwl_testmode_dump)
3360 };
3361
3362 static u32 iwl_hw_detect(struct iwl_priv *priv)
3363 {
3364 return iwl_read32(priv, CSR_HW_REV);
3365 }
3366
3367 static int iwl_set_hw_params(struct iwl_priv *priv)
3368 {
3369 priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
3370 priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
3371 if (iwlagn_mod_params.amsdu_size_8K)
3372 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
3373 else
3374 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
3375
3376 priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
3377
3378 if (iwlagn_mod_params.disable_11n)
3379 priv->cfg->sku &= ~EEPROM_SKU_CAP_11N_ENABLE;
3380
3381 /* Device-specific setup */
3382 return priv->cfg->ops->lib->set_hw_params(priv);
3383 }
3384
3385 static const u8 iwlagn_bss_ac_to_fifo[] = {
3386 IWL_TX_FIFO_VO,
3387 IWL_TX_FIFO_VI,
3388 IWL_TX_FIFO_BE,
3389 IWL_TX_FIFO_BK,
3390 };
3391
3392 static const u8 iwlagn_bss_ac_to_queue[] = {
3393 0, 1, 2, 3,
3394 };
3395
3396 static const u8 iwlagn_pan_ac_to_fifo[] = {
3397 IWL_TX_FIFO_VO_IPAN,
3398 IWL_TX_FIFO_VI_IPAN,
3399 IWL_TX_FIFO_BE_IPAN,
3400 IWL_TX_FIFO_BK_IPAN,
3401 };
3402
3403 static const u8 iwlagn_pan_ac_to_queue[] = {
3404 7, 6, 5, 4,
3405 };
3406
3407 /* This function both allocates and initializes hw and priv. */
3408 static struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg)
3409 {
3410 struct iwl_priv *priv;
3411 /* mac80211 allocates memory for this device instance, including
3412 * space for this driver's private structure */
3413 struct ieee80211_hw *hw;
3414
3415 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwlagn_hw_ops);
3416 if (hw == NULL) {
3417 pr_err("%s: Can not allocate network device\n",
3418 cfg->name);
3419 goto out;
3420 }
3421
3422 priv = hw->priv;
3423 priv->hw = hw;
3424
3425 out:
3426 return hw;
3427 }
3428
3429 static void iwl_init_context(struct iwl_priv *priv)
3430 {
3431 int i;
3432
3433 /*
3434 * The default context is always valid,
3435 * more may be discovered when firmware
3436 * is loaded.
3437 */
3438 priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
3439
3440 for (i = 0; i < NUM_IWL_RXON_CTX; i++)
3441 priv->contexts[i].ctxid = i;
3442
3443 priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
3444 priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
3445 priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
3446 priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
3447 priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
3448 priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
3449 priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
3450 priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
3451 priv->contexts[IWL_RXON_CTX_BSS].ac_to_fifo = iwlagn_bss_ac_to_fifo;
3452 priv->contexts[IWL_RXON_CTX_BSS].ac_to_queue = iwlagn_bss_ac_to_queue;
3453 priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
3454 BIT(NL80211_IFTYPE_ADHOC);
3455 priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
3456 BIT(NL80211_IFTYPE_STATION);
3457 priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
3458 priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
3459 priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
3460 priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
3461
3462 priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
3463 priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
3464 REPLY_WIPAN_RXON_TIMING;
3465 priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
3466 REPLY_WIPAN_RXON_ASSOC;
3467 priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
3468 priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
3469 priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
3470 priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
3471 priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
3472 priv->contexts[IWL_RXON_CTX_PAN].ac_to_fifo = iwlagn_pan_ac_to_fifo;
3473 priv->contexts[IWL_RXON_CTX_PAN].ac_to_queue = iwlagn_pan_ac_to_queue;
3474 priv->contexts[IWL_RXON_CTX_PAN].mcast_queue = IWL_IPAN_MCAST_QUEUE;
3475 priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
3476 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
3477 #ifdef CONFIG_IWL_P2P
3478 priv->contexts[IWL_RXON_CTX_PAN].interface_modes |=
3479 BIT(NL80211_IFTYPE_P2P_CLIENT) | BIT(NL80211_IFTYPE_P2P_GO);
3480 #endif
3481 priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
3482 priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
3483 priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
3484
3485 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
3486 }
3487
3488 int iwl_probe(void *bus_specific, struct iwl_bus_ops *bus_ops,
3489 struct iwl_cfg *cfg)
3490 {
3491 int err = 0;
3492 struct iwl_priv *priv;
3493 struct ieee80211_hw *hw;
3494 u16 num_mac;
3495 u32 hw_rev;
3496
3497 /************************
3498 * 1. Allocating HW data
3499 ************************/
3500 hw = iwl_alloc_all(cfg);
3501 if (!hw) {
3502 err = -ENOMEM;
3503 goto out;
3504 }
3505
3506 priv = hw->priv;
3507
3508 priv->bus.priv = priv;
3509 priv->bus.bus_specific = bus_specific;
3510 priv->bus.ops = bus_ops;
3511 priv->bus.irq = priv->bus.ops->get_irq(&priv->bus);
3512 priv->bus.ops->set_drv_data(&priv->bus, priv);
3513 priv->bus.dev = priv->bus.ops->get_dev(&priv->bus);
3514
3515 iwl_trans_register(&priv->trans);
3516
3517 /* At this point both hw and priv are allocated. */
3518
3519 SET_IEEE80211_DEV(hw, priv->bus.dev);
3520
3521 IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3522 priv->cfg = cfg;
3523 priv->inta_mask = CSR_INI_SET_MASK;
3524
3525 /* is antenna coupling more than 35dB ? */
3526 priv->bt_ant_couple_ok =
3527 (iwlagn_ant_coupling > IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
3528 true : false;
3529
3530 /* enable/disable bt channel inhibition */
3531 priv->bt_ch_announce = iwlagn_bt_ch_announce;
3532 IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
3533 (priv->bt_ch_announce) ? "On" : "Off");
3534
3535 if (iwl_alloc_traffic_mem(priv))
3536 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3537
3538
3539 /* these spin locks will be used in apm_ops.init and EEPROM access
3540 * we should init now
3541 */
3542 spin_lock_init(&priv->reg_lock);
3543 spin_lock_init(&priv->lock);
3544
3545 /*
3546 * stop and reset the on-board processor just in case it is in a
3547 * strange state ... like being left stranded by a primary kernel
3548 * and this is now the kdump kernel trying to start up
3549 */
3550 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3551
3552 /***********************
3553 * 3. Read REV register
3554 ***********************/
3555 hw_rev = iwl_hw_detect(priv);
3556 IWL_INFO(priv, "Detected %s, REV=0x%X\n",
3557 priv->cfg->name, hw_rev);
3558
3559 if (iwl_prepare_card_hw(priv)) {
3560 err = -EIO;
3561 IWL_WARN(priv, "Failed, HW not ready\n");
3562 goto out_free_traffic_mem;
3563 }
3564
3565 /*****************
3566 * 4. Read EEPROM
3567 *****************/
3568 /* Read the EEPROM */
3569 err = iwl_eeprom_init(priv, hw_rev);
3570 if (err) {
3571 IWL_ERR(priv, "Unable to init EEPROM\n");
3572 goto out_free_traffic_mem;
3573 }
3574 err = iwl_eeprom_check_version(priv);
3575 if (err)
3576 goto out_free_eeprom;
3577
3578 err = iwl_eeprom_check_sku(priv);
3579 if (err)
3580 goto out_free_eeprom;
3581
3582 /* extract MAC Address */
3583 iwl_eeprom_get_mac(priv, priv->addresses[0].addr);
3584 IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
3585 priv->hw->wiphy->addresses = priv->addresses;
3586 priv->hw->wiphy->n_addresses = 1;
3587 num_mac = iwl_eeprom_query16(priv, EEPROM_NUM_MAC_ADDRESS);
3588 if (num_mac > 1) {
3589 memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
3590 ETH_ALEN);
3591 priv->addresses[1].addr[5]++;
3592 priv->hw->wiphy->n_addresses++;
3593 }
3594
3595 /* initialize all valid contexts */
3596 iwl_init_context(priv);
3597
3598 /************************
3599 * 5. Setup HW constants
3600 ************************/
3601 if (iwl_set_hw_params(priv)) {
3602 err = -ENOENT;
3603 IWL_ERR(priv, "failed to set hw parameters\n");
3604 goto out_free_eeprom;
3605 }
3606
3607 /*******************
3608 * 6. Setup priv
3609 *******************/
3610
3611 err = iwl_init_drv(priv);
3612 if (err)
3613 goto out_free_eeprom;
3614 /* At this point both hw and priv are initialized. */
3615
3616 /********************
3617 * 7. Setup services
3618 ********************/
3619 iwl_alloc_isr_ict(priv);
3620
3621 err = request_irq(priv->bus.irq, iwl_isr_ict, IRQF_SHARED,
3622 DRV_NAME, priv);
3623 if (err) {
3624 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->bus.irq);
3625 goto out_uninit_drv;
3626 }
3627
3628 iwl_setup_deferred_work(priv);
3629 iwl_setup_rx_handlers(priv);
3630 iwl_testmode_init(priv);
3631
3632 /*********************************************
3633 * 8. Enable interrupts
3634 *********************************************/
3635
3636 iwl_enable_rfkill_int(priv);
3637
3638 /* If platform's RF_KILL switch is NOT set to KILL */
3639 if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3640 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3641 else
3642 set_bit(STATUS_RF_KILL_HW, &priv->status);
3643
3644 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3645 test_bit(STATUS_RF_KILL_HW, &priv->status));
3646
3647 iwl_power_initialize(priv);
3648 iwl_tt_initialize(priv);
3649
3650 init_completion(&priv->_agn.firmware_loading_complete);
3651
3652 err = iwl_request_firmware(priv, true);
3653 if (err)
3654 goto out_destroy_workqueue;
3655
3656 return 0;
3657
3658 out_destroy_workqueue:
3659 destroy_workqueue(priv->workqueue);
3660 priv->workqueue = NULL;
3661 free_irq(priv->bus.irq, priv);
3662 iwl_free_isr_ict(priv);
3663 out_uninit_drv:
3664 iwl_uninit_drv(priv);
3665 out_free_eeprom:
3666 iwl_eeprom_free(priv);
3667 out_free_traffic_mem:
3668 iwl_free_traffic_mem(priv);
3669 ieee80211_free_hw(priv->hw);
3670 out:
3671 return err;
3672 }
3673
3674 void __devexit iwl_remove(struct iwl_priv * priv)
3675 {
3676 unsigned long flags;
3677
3678 wait_for_completion(&priv->_agn.firmware_loading_complete);
3679
3680 IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3681
3682 iwl_dbgfs_unregister(priv);
3683 sysfs_remove_group(&priv->bus.dev->kobj,
3684 &iwl_attribute_group);
3685
3686 /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3687 * to be called and iwl_down since we are removing the device
3688 * we need to set STATUS_EXIT_PENDING bit.
3689 */
3690 set_bit(STATUS_EXIT_PENDING, &priv->status);
3691
3692 iwl_testmode_cleanup(priv);
3693 iwl_leds_exit(priv);
3694
3695 if (priv->mac80211_registered) {
3696 ieee80211_unregister_hw(priv->hw);
3697 priv->mac80211_registered = 0;
3698 }
3699
3700 /* Reset to low power before unloading driver. */
3701 iwl_apm_stop(priv);
3702
3703 iwl_tt_exit(priv);
3704
3705 /* make sure we flush any pending irq or
3706 * tasklet for the driver
3707 */
3708 spin_lock_irqsave(&priv->lock, flags);
3709 iwl_disable_interrupts(priv);
3710 spin_unlock_irqrestore(&priv->lock, flags);
3711
3712 iwl_synchronize_irq(priv);
3713
3714 iwl_dealloc_ucode(priv);
3715
3716 trans_rx_free(priv);
3717 trans_tx_free(priv);
3718
3719 iwl_eeprom_free(priv);
3720
3721
3722 /*netif_stop_queue(dev); */
3723 flush_workqueue(priv->workqueue);
3724
3725 /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3726 * priv->workqueue... so we can't take down the workqueue
3727 * until now... */
3728 destroy_workqueue(priv->workqueue);
3729 priv->workqueue = NULL;
3730 iwl_free_traffic_mem(priv);
3731
3732 free_irq(priv->bus.irq, priv);
3733 priv->bus.ops->set_drv_data(&priv->bus, NULL);
3734
3735 iwl_uninit_drv(priv);
3736
3737 iwl_free_isr_ict(priv);
3738
3739 dev_kfree_skb(priv->beacon_skb);
3740
3741 ieee80211_free_hw(priv->hw);
3742 }
3743
3744
3745 /*****************************************************************************
3746 *
3747 * driver and module entry point
3748 *
3749 *****************************************************************************/
3750 static int __init iwl_init(void)
3751 {
3752
3753 int ret;
3754 pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3755 pr_info(DRV_COPYRIGHT "\n");
3756
3757 ret = iwlagn_rate_control_register();
3758 if (ret) {
3759 pr_err("Unable to register rate control algorithm: %d\n", ret);
3760 return ret;
3761 }
3762
3763 ret = iwl_pci_register_driver();
3764
3765 if (ret)
3766 goto error_register;
3767 return ret;
3768
3769 error_register:
3770 iwlagn_rate_control_unregister();
3771 return ret;
3772 }
3773
3774 static void __exit iwl_exit(void)
3775 {
3776 iwl_pci_unregister_driver();
3777 iwlagn_rate_control_unregister();
3778 }
3779
3780 module_exit(iwl_exit);
3781 module_init(iwl_init);
3782
3783 #ifdef CONFIG_IWLWIFI_DEBUG
3784 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3785 MODULE_PARM_DESC(debug, "debug output mask");
3786 #endif
3787
3788 module_param_named(swcrypto, iwlagn_mod_params.sw_crypto, int, S_IRUGO);
3789 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
3790 module_param_named(queues_num, iwlagn_mod_params.num_of_queues, int, S_IRUGO);
3791 MODULE_PARM_DESC(queues_num, "number of hw queues.");
3792 module_param_named(11n_disable, iwlagn_mod_params.disable_11n, int, S_IRUGO);
3793 MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
3794 module_param_named(amsdu_size_8K, iwlagn_mod_params.amsdu_size_8K,
3795 int, S_IRUGO);
3796 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
3797 module_param_named(fw_restart, iwlagn_mod_params.restart_fw, int, S_IRUGO);
3798 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
3799
3800 module_param_named(ucode_alternative, iwlagn_wanted_ucode_alternative, int,
3801 S_IRUGO);
3802 MODULE_PARM_DESC(ucode_alternative,
3803 "specify ucode alternative to use from ucode file");
3804
3805 module_param_named(antenna_coupling, iwlagn_ant_coupling, int, S_IRUGO);
3806 MODULE_PARM_DESC(antenna_coupling,
3807 "specify antenna coupling in dB (defualt: 0 dB)");
3808
3809 module_param_named(bt_ch_inhibition, iwlagn_bt_ch_announce, bool, S_IRUGO);
3810 MODULE_PARM_DESC(bt_ch_inhibition,
3811 "Disable BT channel inhibition (default: enable)");
3812
3813 module_param_named(plcp_check, iwlagn_mod_params.plcp_check, bool, S_IRUGO);
3814 MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");
3815
3816 module_param_named(ack_check, iwlagn_mod_params.ack_check, bool, S_IRUGO);
3817 MODULE_PARM_DESC(ack_check, "Check ack health (default: 0 [disabled])");
3818
3819 module_param_named(wd_disable, iwlagn_mod_params.wd_disable, bool, S_IRUGO);
3820 MODULE_PARM_DESC(wd_disable,
3821 "Disable stuck queue watchdog timer (default: 0 [enabled])");
3822
3823 /*
3824 * set bt_coex_active to true, uCode will do kill/defer
3825 * every time the priority line is asserted (BT is sending signals on the
3826 * priority line in the PCIx).
3827 * set bt_coex_active to false, uCode will ignore the BT activity and
3828 * perform the normal operation
3829 *
3830 * User might experience transmit issue on some platform due to WiFi/BT
3831 * co-exist problem. The possible behaviors are:
3832 * Able to scan and finding all the available AP
3833 * Not able to associate with any AP
3834 * On those platforms, WiFi communication can be restored by set
3835 * "bt_coex_active" module parameter to "false"
3836 *
3837 * default: bt_coex_active = true (BT_COEX_ENABLE)
3838 */
3839 module_param_named(bt_coex_active, iwlagn_mod_params.bt_coex_active,
3840 bool, S_IRUGO);
3841 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bt co-exist (default: enable)");
3842
3843 module_param_named(led_mode, iwlagn_mod_params.led_mode, int, S_IRUGO);
3844 MODULE_PARM_DESC(led_mode, "0=system default, "
3845 "1=On(RF On)/Off(RF Off), 2=blinking (default: 0)");
3846
3847 module_param_named(power_save, iwlagn_mod_params.power_save,
3848 bool, S_IRUGO);
3849 MODULE_PARM_DESC(power_save,
3850 "enable WiFi power management (default: disable)");
3851
3852 module_param_named(power_level, iwlagn_mod_params.power_level,
3853 int, S_IRUGO);
3854 MODULE_PARM_DESC(power_level,
3855 "default power save level (range from 1 - 5, default: 1)");
3856
3857 /*
3858 * For now, keep using power level 1 instead of automatically
3859 * adjusting ...
3860 */
3861 module_param_named(no_sleep_autoadjust, iwlagn_mod_params.no_sleep_autoadjust,
3862 bool, S_IRUGO);
3863 MODULE_PARM_DESC(no_sleep_autoadjust,
3864 "don't automatically adjust sleep level "
3865 "according to maximum network latency (default: true)");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree