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iwlagn: waterfall the bus level if prepare card failed
[linux/fpc-iii.git] / drivers / net / wireless / iwlwifi / iwl-agn.c
blobbec98bd67abd10203b1b9d6f9d3e91fcf792edc1
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29
30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31
32 #include <linux/kernel.h>
33 #include <linux/module.h>
34 #include <linux/init.h>
35 #include <linux/slab.h>
36 #include <linux/dma-mapping.h>
37 #include <linux/delay.h>
38 #include <linux/sched.h>
39 #include <linux/skbuff.h>
40 #include <linux/netdevice.h>
41 #include <linux/wireless.h>
42 #include <linux/firmware.h>
43 #include <linux/etherdevice.h>
44 #include <linux/if_arp.h>
45
46 #include <net/mac80211.h>
47
48 #include <asm/div64.h>
49
50 #include "iwl-eeprom.h"
51 #include "iwl-dev.h"
52 #include "iwl-core.h"
53 #include "iwl-io.h"
54 #include "iwl-helpers.h"
55 #include "iwl-sta.h"
56 #include "iwl-agn-calib.h"
57 #include "iwl-agn.h"
58 #include "iwl-pci.h"
59
60
61 /******************************************************************************
62 *
63 * module boiler plate
64 *
65 ******************************************************************************/
66
67 /*
68 * module name, copyright, version, etc.
69 */
70 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
71
72 #ifdef CONFIG_IWLWIFI_DEBUG
73 #define VD "d"
74 #else
75 #define VD
76 #endif
77
78 #define DRV_VERSION IWLWIFI_VERSION VD
79
80
81 MODULE_DESCRIPTION(DRV_DESCRIPTION);
82 MODULE_VERSION(DRV_VERSION);
83 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
84 MODULE_LICENSE("GPL");
85
86 static int iwlagn_ant_coupling;
87 static bool iwlagn_bt_ch_announce = 1;
88
89 void iwl_update_chain_flags(struct iwl_priv *priv)
90 {
91 struct iwl_rxon_context *ctx;
92
93 if (priv->cfg->ops->hcmd->set_rxon_chain) {
94 for_each_context(priv, ctx) {
95 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
96 if (ctx->active.rx_chain != ctx->staging.rx_chain)
97 iwlagn_commit_rxon(priv, ctx);
98 }
99 }
100 }
101
102 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
103 static void iwl_set_beacon_tim(struct iwl_priv *priv,
104 struct iwl_tx_beacon_cmd *tx_beacon_cmd,
105 u8 *beacon, u32 frame_size)
106 {
107 u16 tim_idx;
108 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
109
110 /*
111 * The index is relative to frame start but we start looking at the
112 * variable-length part of the beacon.
113 */
114 tim_idx = mgmt->u.beacon.variable - beacon;
115
116 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
117 while ((tim_idx < (frame_size - 2)) &&
118 (beacon[tim_idx] != WLAN_EID_TIM))
119 tim_idx += beacon[tim_idx+1] + 2;
120
121 /* If TIM field was found, set variables */
122 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
123 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
124 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
125 } else
126 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
127 }
128
129 int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
130 {
131 struct iwl_tx_beacon_cmd *tx_beacon_cmd;
132 struct iwl_host_cmd cmd = {
133 .id = REPLY_TX_BEACON,
134 };
135 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 rate = iwl_rate_get_lowest_plcp(priv, priv->beacon_ctx);
176 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
177 priv->hw_params.valid_tx_ant);
178 rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
179 if ((rate >= IWL_FIRST_CCK_RATE) && (rate <= IWL_LAST_CCK_RATE))
180 rate_flags |= RATE_MCS_CCK_MSK;
181 tx_beacon_cmd->tx.rate_n_flags = iwl_hw_set_rate_n_flags(rate,
182 rate_flags);
183
184 /* Submit command */
185 cmd.len[0] = sizeof(*tx_beacon_cmd);
186 cmd.data[0] = tx_beacon_cmd;
187 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
188 cmd.len[1] = frame_size;
189 cmd.data[1] = priv->beacon_skb->data;
190 cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
191
192 return iwl_send_cmd_sync(priv, &cmd);
193 }
194
195 static void iwl_bg_beacon_update(struct work_struct *work)
196 {
197 struct iwl_priv *priv =
198 container_of(work, struct iwl_priv, beacon_update);
199 struct sk_buff *beacon;
200
201 mutex_lock(&priv->mutex);
202 if (!priv->beacon_ctx) {
203 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
204 goto out;
205 }
206
207 if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
208 /*
209 * The ucode will send beacon notifications even in
210 * IBSS mode, but we don't want to process them. But
211 * we need to defer the type check to here due to
212 * requiring locking around the beacon_ctx access.
213 */
214 goto out;
215 }
216
217 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
218 beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
219 if (!beacon) {
220 IWL_ERR(priv, "update beacon failed -- keeping old\n");
221 goto out;
222 }
223
224 /* new beacon skb is allocated every time; dispose previous.*/
225 dev_kfree_skb(priv->beacon_skb);
226
227 priv->beacon_skb = beacon;
228
229 iwlagn_send_beacon_cmd(priv);
230 out:
231 mutex_unlock(&priv->mutex);
232 }
233
234 static void iwl_bg_bt_runtime_config(struct work_struct *work)
235 {
236 struct iwl_priv *priv =
237 container_of(work, struct iwl_priv, bt_runtime_config);
238
239 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
240 return;
241
242 /* dont send host command if rf-kill is on */
243 if (!iwl_is_ready_rf(priv))
244 return;
245 priv->cfg->ops->hcmd->send_bt_config(priv);
246 }
247
248 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
249 {
250 struct iwl_priv *priv =
251 container_of(work, struct iwl_priv, bt_full_concurrency);
252 struct iwl_rxon_context *ctx;
253
254 mutex_lock(&priv->mutex);
255
256 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
257 goto out;
258
259 /* dont send host command if rf-kill is on */
260 if (!iwl_is_ready_rf(priv))
261 goto out;
262
263 IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
264 priv->bt_full_concurrent ?
265 "full concurrency" : "3-wire");
266
267 /*
268 * LQ & RXON updated cmds must be sent before BT Config cmd
269 * to avoid 3-wire collisions
270 */
271 for_each_context(priv, ctx) {
272 if (priv->cfg->ops->hcmd->set_rxon_chain)
273 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
274 iwlagn_commit_rxon(priv, ctx);
275 }
276
277 priv->cfg->ops->hcmd->send_bt_config(priv);
278 out:
279 mutex_unlock(&priv->mutex);
280 }
281
282 /**
283 * iwl_bg_statistics_periodic - Timer callback to queue statistics
284 *
285 * This callback is provided in order to send a statistics request.
286 *
287 * This timer function is continually reset to execute within
288 * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
289 * was received. We need to ensure we receive the statistics in order
290 * to update the temperature used for calibrating the TXPOWER.
291 */
292 static void iwl_bg_statistics_periodic(unsigned long data)
293 {
294 struct iwl_priv *priv = (struct iwl_priv *)data;
295
296 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
297 return;
298
299 /* dont send host command if rf-kill is on */
300 if (!iwl_is_ready_rf(priv))
301 return;
302
303 iwl_send_statistics_request(priv, CMD_ASYNC, false);
304 }
305
306
307 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
308 u32 start_idx, u32 num_events,
309 u32 mode)
310 {
311 u32 i;
312 u32 ptr; /* SRAM byte address of log data */
313 u32 ev, time, data; /* event log data */
314 unsigned long reg_flags;
315
316 if (mode == 0)
317 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
318 else
319 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
320
321 /* Make sure device is powered up for SRAM reads */
322 spin_lock_irqsave(&priv->reg_lock, reg_flags);
323 if (iwl_grab_nic_access(priv)) {
324 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
325 return;
326 }
327
328 /* Set starting address; reads will auto-increment */
329 iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
330 rmb();
331
332 /*
333 * "time" is actually "data" for mode 0 (no timestamp).
334 * place event id # at far right for easier visual parsing.
335 */
336 for (i = 0; i < num_events; i++) {
337 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
338 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
339 if (mode == 0) {
340 trace_iwlwifi_dev_ucode_cont_event(priv,
341 0, time, ev);
342 } else {
343 data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
344 trace_iwlwifi_dev_ucode_cont_event(priv,
345 time, data, ev);
346 }
347 }
348 /* Allow device to power down */
349 iwl_release_nic_access(priv);
350 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
351 }
352
353 static void iwl_continuous_event_trace(struct iwl_priv *priv)
354 {
355 u32 capacity; /* event log capacity in # entries */
356 u32 base; /* SRAM byte address of event log header */
357 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
358 u32 num_wraps; /* # times uCode wrapped to top of log */
359 u32 next_entry; /* index of next entry to be written by uCode */
360
361 base = priv->device_pointers.error_event_table;
362 if (priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
363 capacity = iwl_read_targ_mem(priv, base);
364 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
365 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
366 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
367 } else
368 return;
369
370 if (num_wraps == priv->event_log.num_wraps) {
371 iwl_print_cont_event_trace(priv,
372 base, priv->event_log.next_entry,
373 next_entry - priv->event_log.next_entry,
374 mode);
375 priv->event_log.non_wraps_count++;
376 } else {
377 if ((num_wraps - priv->event_log.num_wraps) > 1)
378 priv->event_log.wraps_more_count++;
379 else
380 priv->event_log.wraps_once_count++;
381 trace_iwlwifi_dev_ucode_wrap_event(priv,
382 num_wraps - priv->event_log.num_wraps,
383 next_entry, priv->event_log.next_entry);
384 if (next_entry < priv->event_log.next_entry) {
385 iwl_print_cont_event_trace(priv, base,
386 priv->event_log.next_entry,
387 capacity - priv->event_log.next_entry,
388 mode);
389
390 iwl_print_cont_event_trace(priv, base, 0,
391 next_entry, mode);
392 } else {
393 iwl_print_cont_event_trace(priv, base,
394 next_entry, capacity - next_entry,
395 mode);
396
397 iwl_print_cont_event_trace(priv, base, 0,
398 next_entry, mode);
399 }
400 }
401 priv->event_log.num_wraps = num_wraps;
402 priv->event_log.next_entry = next_entry;
403 }
404
405 /**
406 * iwl_bg_ucode_trace - Timer callback to log ucode event
407 *
408 * The timer is continually set to execute every
409 * UCODE_TRACE_PERIOD milliseconds after the last timer expired
410 * this function is to perform continuous uCode event logging operation
411 * if enabled
412 */
413 static void iwl_bg_ucode_trace(unsigned long data)
414 {
415 struct iwl_priv *priv = (struct iwl_priv *)data;
416
417 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
418 return;
419
420 if (priv->event_log.ucode_trace) {
421 iwl_continuous_event_trace(priv);
422 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
423 mod_timer(&priv->ucode_trace,
424 jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
425 }
426 }
427
428 static void iwl_bg_tx_flush(struct work_struct *work)
429 {
430 struct iwl_priv *priv =
431 container_of(work, struct iwl_priv, tx_flush);
432
433 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
434 return;
435
436 /* do nothing if rf-kill is on */
437 if (!iwl_is_ready_rf(priv))
438 return;
439
440 IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
441 iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
442 }
443
444 /**
445 * iwl_rx_handle - Main entry function for receiving responses from uCode
446 *
447 * Uses the priv->rx_handlers callback function array to invoke
448 * the appropriate handlers, including command responses,
449 * frame-received notifications, and other notifications.
450 */
451 static void iwl_rx_handle(struct iwl_priv *priv)
452 {
453 struct iwl_rx_mem_buffer *rxb;
454 struct iwl_rx_packet *pkt;
455 struct iwl_rx_queue *rxq = &priv->rxq;
456 u32 r, i;
457 int reclaim;
458 unsigned long flags;
459 u8 fill_rx = 0;
460 u32 count = 8;
461 int total_empty;
462
463 /* uCode's read index (stored in shared DRAM) indicates the last Rx
464 * buffer that the driver may process (last buffer filled by ucode). */
465 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
466 i = rxq->read;
467
468 /* Rx interrupt, but nothing sent from uCode */
469 if (i == r)
470 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
471
472 /* calculate total frames need to be restock after handling RX */
473 total_empty = r - rxq->write_actual;
474 if (total_empty < 0)
475 total_empty += RX_QUEUE_SIZE;
476
477 if (total_empty > (RX_QUEUE_SIZE / 2))
478 fill_rx = 1;
479
480 while (i != r) {
481 int len;
482
483 rxb = rxq->queue[i];
484
485 /* If an RXB doesn't have a Rx queue slot associated with it,
486 * then a bug has been introduced in the queue refilling
487 * routines -- catch it here */
488 if (WARN_ON(rxb == NULL)) {
489 i = (i + 1) & RX_QUEUE_MASK;
490 continue;
491 }
492
493 rxq->queue[i] = NULL;
494
495 dma_unmap_page(priv->bus.dev, rxb->page_dma,
496 PAGE_SIZE << priv->hw_params.rx_page_order,
497 DMA_FROM_DEVICE);
498 pkt = rxb_addr(rxb);
499
500 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
501 len += sizeof(u32); /* account for status word */
502 trace_iwlwifi_dev_rx(priv, pkt, len);
503
504 /* Reclaim a command buffer only if this packet is a response
505 * to a (driver-originated) command.
506 * If the packet (e.g. Rx frame) originated from uCode,
507 * there is no command buffer to reclaim.
508 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
509 * but apparently a few don't get set; catch them here. */
510 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
511 (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
512 (pkt->hdr.cmd != REPLY_RX) &&
513 (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
514 (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
515 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
516 (pkt->hdr.cmd != REPLY_TX);
517
518 /*
519 * Do the notification wait before RX handlers so
520 * even if the RX handler consumes the RXB we have
521 * access to it in the notification wait entry.
522 */
523 if (!list_empty(&priv->_agn.notif_waits)) {
524 struct iwl_notification_wait *w;
525
526 spin_lock(&priv->_agn.notif_wait_lock);
527 list_for_each_entry(w, &priv->_agn.notif_waits, list) {
528 if (w->cmd == pkt->hdr.cmd) {
529 w->triggered = true;
530 if (w->fn)
531 w->fn(priv, pkt, w->fn_data);
532 }
533 }
534 spin_unlock(&priv->_agn.notif_wait_lock);
535
536 wake_up_all(&priv->_agn.notif_waitq);
537 }
538 if (priv->pre_rx_handler)
539 priv->pre_rx_handler(priv, rxb);
540
541 /* Based on type of command response or notification,
542 * handle those that need handling via function in
543 * rx_handlers table. See iwl_setup_rx_handlers() */
544 if (priv->rx_handlers[pkt->hdr.cmd]) {
545 IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
546 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
547 priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
548 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
549 } else {
550 /* No handling needed */
551 IWL_DEBUG_RX(priv,
552 "r %d i %d No handler needed for %s, 0x%02x\n",
553 r, i, get_cmd_string(pkt->hdr.cmd),
554 pkt->hdr.cmd);
555 }
556
557 /*
558 * XXX: After here, we should always check rxb->page
559 * against NULL before touching it or its virtual
560 * memory (pkt). Because some rx_handler might have
561 * already taken or freed the pages.
562 */
563
564 if (reclaim) {
565 /* Invoke any callbacks, transfer the buffer to caller,
566 * and fire off the (possibly) blocking iwl_send_cmd()
567 * as we reclaim the driver command queue */
568 if (rxb->page)
569 iwl_tx_cmd_complete(priv, rxb);
570 else
571 IWL_WARN(priv, "Claim null rxb?\n");
572 }
573
574 /* Reuse the page if possible. For notification packets and
575 * SKBs that fail to Rx correctly, add them back into the
576 * rx_free list for reuse later. */
577 spin_lock_irqsave(&rxq->lock, flags);
578 if (rxb->page != NULL) {
579 rxb->page_dma = dma_map_page(priv->bus.dev, rxb->page,
580 0, PAGE_SIZE << priv->hw_params.rx_page_order,
581 DMA_FROM_DEVICE);
582 list_add_tail(&rxb->list, &rxq->rx_free);
583 rxq->free_count++;
584 } else
585 list_add_tail(&rxb->list, &rxq->rx_used);
586
587 spin_unlock_irqrestore(&rxq->lock, flags);
588
589 i = (i + 1) & RX_QUEUE_MASK;
590 /* If there are a lot of unused frames,
591 * restock the Rx queue so ucode wont assert. */
592 if (fill_rx) {
593 count++;
594 if (count >= 8) {
595 rxq->read = i;
596 iwlagn_rx_replenish_now(priv);
597 count = 0;
598 }
599 }
600 }
601
602 /* Backtrack one entry */
603 rxq->read = i;
604 if (fill_rx)
605 iwlagn_rx_replenish_now(priv);
606 else
607 iwlagn_rx_queue_restock(priv);
608 }
609
610 /* tasklet for iwlagn interrupt */
611 static void iwl_irq_tasklet(struct iwl_priv *priv)
612 {
613 u32 inta = 0;
614 u32 handled = 0;
615 unsigned long flags;
616 u32 i;
617 #ifdef CONFIG_IWLWIFI_DEBUG
618 u32 inta_mask;
619 #endif
620
621 spin_lock_irqsave(&priv->lock, flags);
622
623 /* Ack/clear/reset pending uCode interrupts.
624 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
625 */
626 /* There is a hardware bug in the interrupt mask function that some
627 * interrupts (i.e. CSR_INT_BIT_SCD) can still be generated even if
628 * they are disabled in the CSR_INT_MASK register. Furthermore the
629 * ICT interrupt handling mechanism has another bug that might cause
630 * these unmasked interrupts fail to be detected. We workaround the
631 * hardware bugs here by ACKing all the possible interrupts so that
632 * interrupt coalescing can still be achieved.
633 */
634 iwl_write32(priv, CSR_INT, priv->_agn.inta | ~priv->inta_mask);
635
636 inta = priv->_agn.inta;
637
638 #ifdef CONFIG_IWLWIFI_DEBUG
639 if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
640 /* just for debug */
641 inta_mask = iwl_read32(priv, CSR_INT_MASK);
642 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
643 inta, inta_mask);
644 }
645 #endif
646
647 spin_unlock_irqrestore(&priv->lock, flags);
648
649 /* saved interrupt in inta variable now we can reset priv->_agn.inta */
650 priv->_agn.inta = 0;
651
652 /* Now service all interrupt bits discovered above. */
653 if (inta & CSR_INT_BIT_HW_ERR) {
654 IWL_ERR(priv, "Hardware error detected. Restarting.\n");
655
656 /* Tell the device to stop sending interrupts */
657 iwl_disable_interrupts(priv);
658
659 priv->isr_stats.hw++;
660 iwl_irq_handle_error(priv);
661
662 handled |= CSR_INT_BIT_HW_ERR;
663
664 return;
665 }
666
667 #ifdef CONFIG_IWLWIFI_DEBUG
668 if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
669 /* NIC fires this, but we don't use it, redundant with WAKEUP */
670 if (inta & CSR_INT_BIT_SCD) {
671 IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
672 "the frame/frames.\n");
673 priv->isr_stats.sch++;
674 }
675
676 /* Alive notification via Rx interrupt will do the real work */
677 if (inta & CSR_INT_BIT_ALIVE) {
678 IWL_DEBUG_ISR(priv, "Alive interrupt\n");
679 priv->isr_stats.alive++;
680 }
681 }
682 #endif
683 /* Safely ignore these bits for debug checks below */
684 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
685
686 /* HW RF KILL switch toggled */
687 if (inta & CSR_INT_BIT_RF_KILL) {
688 int hw_rf_kill = 0;
689 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
690 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
691 hw_rf_kill = 1;
692
693 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
694 hw_rf_kill ? "disable radio" : "enable radio");
695
696 priv->isr_stats.rfkill++;
697
698 /* driver only loads ucode once setting the interface up.
699 * the driver allows loading the ucode even if the radio
700 * is killed. Hence update the killswitch state here. The
701 * rfkill handler will care about restarting if needed.
702 */
703 if (!test_bit(STATUS_ALIVE, &priv->status)) {
704 if (hw_rf_kill)
705 set_bit(STATUS_RF_KILL_HW, &priv->status);
706 else
707 clear_bit(STATUS_RF_KILL_HW, &priv->status);
708 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
709 }
710
711 handled |= CSR_INT_BIT_RF_KILL;
712 }
713
714 /* Chip got too hot and stopped itself */
715 if (inta & CSR_INT_BIT_CT_KILL) {
716 IWL_ERR(priv, "Microcode CT kill error detected.\n");
717 priv->isr_stats.ctkill++;
718 handled |= CSR_INT_BIT_CT_KILL;
719 }
720
721 /* Error detected by uCode */
722 if (inta & CSR_INT_BIT_SW_ERR) {
723 IWL_ERR(priv, "Microcode SW error detected. "
724 " Restarting 0x%X.\n", inta);
725 priv->isr_stats.sw++;
726 iwl_irq_handle_error(priv);
727 handled |= CSR_INT_BIT_SW_ERR;
728 }
729
730 /* uCode wakes up after power-down sleep */
731 if (inta & CSR_INT_BIT_WAKEUP) {
732 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
733 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
734 for (i = 0; i < priv->hw_params.max_txq_num; i++)
735 iwl_txq_update_write_ptr(priv, &priv->txq[i]);
736
737 priv->isr_stats.wakeup++;
738
739 handled |= CSR_INT_BIT_WAKEUP;
740 }
741
742 /* All uCode command responses, including Tx command responses,
743 * Rx "responses" (frame-received notification), and other
744 * notifications from uCode come through here*/
745 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
746 CSR_INT_BIT_RX_PERIODIC)) {
747 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
748 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
749 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
750 iwl_write32(priv, CSR_FH_INT_STATUS,
751 CSR_FH_INT_RX_MASK);
752 }
753 if (inta & CSR_INT_BIT_RX_PERIODIC) {
754 handled |= CSR_INT_BIT_RX_PERIODIC;
755 iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
756 }
757 /* Sending RX interrupt require many steps to be done in the
758 * the device:
759 * 1- write interrupt to current index in ICT table.
760 * 2- dma RX frame.
761 * 3- update RX shared data to indicate last write index.
762 * 4- send interrupt.
763 * This could lead to RX race, driver could receive RX interrupt
764 * but the shared data changes does not reflect this;
765 * periodic interrupt will detect any dangling Rx activity.
766 */
767
768 /* Disable periodic interrupt; we use it as just a one-shot. */
769 iwl_write8(priv, CSR_INT_PERIODIC_REG,
770 CSR_INT_PERIODIC_DIS);
771 iwl_rx_handle(priv);
772
773 /*
774 * Enable periodic interrupt in 8 msec only if we received
775 * real RX interrupt (instead of just periodic int), to catch
776 * any dangling Rx interrupt. If it was just the periodic
777 * interrupt, there was no dangling Rx activity, and no need
778 * to extend the periodic interrupt; one-shot is enough.
779 */
780 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
781 iwl_write8(priv, CSR_INT_PERIODIC_REG,
782 CSR_INT_PERIODIC_ENA);
783
784 priv->isr_stats.rx++;
785 }
786
787 /* This "Tx" DMA channel is used only for loading uCode */
788 if (inta & CSR_INT_BIT_FH_TX) {
789 iwl_write32(priv, CSR_FH_INT_STATUS, CSR_FH_INT_TX_MASK);
790 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
791 priv->isr_stats.tx++;
792 handled |= CSR_INT_BIT_FH_TX;
793 /* Wake up uCode load routine, now that load is complete */
794 priv->ucode_write_complete = 1;
795 wake_up_interruptible(&priv->wait_command_queue);
796 }
797
798 if (inta & ~handled) {
799 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
800 priv->isr_stats.unhandled++;
801 }
802
803 if (inta & ~(priv->inta_mask)) {
804 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
805 inta & ~priv->inta_mask);
806 }
807
808 /* Re-enable all interrupts */
809 /* only Re-enable if disabled by irq */
810 if (test_bit(STATUS_INT_ENABLED, &priv->status))
811 iwl_enable_interrupts(priv);
812 /* Re-enable RF_KILL if it occurred */
813 else if (handled & CSR_INT_BIT_RF_KILL)
814 iwl_enable_rfkill_int(priv);
815 }
816
817 /*****************************************************************************
818 *
819 * sysfs attributes
820 *
821 *****************************************************************************/
822
823 #ifdef CONFIG_IWLWIFI_DEBUG
824
825 /*
826 * The following adds a new attribute to the sysfs representation
827 * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
828 * used for controlling the debug level.
829 *
830 * See the level definitions in iwl for details.
831 *
832 * The debug_level being managed using sysfs below is a per device debug
833 * level that is used instead of the global debug level if it (the per
834 * device debug level) is set.
835 */
836 static ssize_t show_debug_level(struct device *d,
837 struct device_attribute *attr, char *buf)
838 {
839 struct iwl_priv *priv = dev_get_drvdata(d);
840 return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
841 }
842 static ssize_t store_debug_level(struct device *d,
843 struct device_attribute *attr,
844 const char *buf, size_t count)
845 {
846 struct iwl_priv *priv = dev_get_drvdata(d);
847 unsigned long val;
848 int ret;
849
850 ret = strict_strtoul(buf, 0, &val);
851 if (ret)
852 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
853 else {
854 priv->debug_level = val;
855 if (iwl_alloc_traffic_mem(priv))
856 IWL_ERR(priv,
857 "Not enough memory to generate traffic log\n");
858 }
859 return strnlen(buf, count);
860 }
861
862 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
863 show_debug_level, store_debug_level);
864
865
866 #endif /* CONFIG_IWLWIFI_DEBUG */
867
868
869 static ssize_t show_temperature(struct device *d,
870 struct device_attribute *attr, char *buf)
871 {
872 struct iwl_priv *priv = dev_get_drvdata(d);
873
874 if (!iwl_is_alive(priv))
875 return -EAGAIN;
876
877 return sprintf(buf, "%d\n", priv->temperature);
878 }
879
880 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
881
882 static ssize_t show_tx_power(struct device *d,
883 struct device_attribute *attr, char *buf)
884 {
885 struct iwl_priv *priv = dev_get_drvdata(d);
886
887 if (!iwl_is_ready_rf(priv))
888 return sprintf(buf, "off\n");
889 else
890 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
891 }
892
893 static ssize_t store_tx_power(struct device *d,
894 struct device_attribute *attr,
895 const char *buf, size_t count)
896 {
897 struct iwl_priv *priv = dev_get_drvdata(d);
898 unsigned long val;
899 int ret;
900
901 ret = strict_strtoul(buf, 10, &val);
902 if (ret)
903 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
904 else {
905 ret = iwl_set_tx_power(priv, val, false);
906 if (ret)
907 IWL_ERR(priv, "failed setting tx power (0x%d).\n",
908 ret);
909 else
910 ret = count;
911 }
912 return ret;
913 }
914
915 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
916
917 static struct attribute *iwl_sysfs_entries[] = {
918 &dev_attr_temperature.attr,
919 &dev_attr_tx_power.attr,
920 #ifdef CONFIG_IWLWIFI_DEBUG
921 &dev_attr_debug_level.attr,
922 #endif
923 NULL
924 };
925
926 static struct attribute_group iwl_attribute_group = {
927 .name = NULL, /* put in device directory */
928 .attrs = iwl_sysfs_entries,
929 };
930
931 /******************************************************************************
932 *
933 * uCode download functions
934 *
935 ******************************************************************************/
936
937 static void iwl_free_fw_desc(struct iwl_priv *priv, struct fw_desc *desc)
938 {
939 if (desc->v_addr)
940 dma_free_coherent(priv->bus.dev, desc->len,
941 desc->v_addr, desc->p_addr);
942 desc->v_addr = NULL;
943 desc->len = 0;
944 }
945
946 static void iwl_free_fw_img(struct iwl_priv *priv, struct fw_img *img)
947 {
948 iwl_free_fw_desc(priv, &img->code);
949 iwl_free_fw_desc(priv, &img->data);
950 }
951
952 static void iwl_dealloc_ucode(struct iwl_priv *priv)
953 {
954 iwl_free_fw_img(priv, &priv->ucode_rt);
955 iwl_free_fw_img(priv, &priv->ucode_init);
956 }
957
958 static int iwl_alloc_fw_desc(struct iwl_priv *priv, struct fw_desc *desc,
959 const void *data, size_t len)
960 {
961 if (!len) {
962 desc->v_addr = NULL;
963 return -EINVAL;
964 }
965
966 desc->v_addr = dma_alloc_coherent(priv->bus.dev, len,
967 &desc->p_addr, GFP_KERNEL);
968 if (!desc->v_addr)
969 return -ENOMEM;
970
971 desc->len = len;
972 memcpy(desc->v_addr, data, len);
973 return 0;
974 }
975
976 struct iwlagn_ucode_capabilities {
977 u32 max_probe_length;
978 u32 standard_phy_calibration_size;
979 u32 flags;
980 };
981
982 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
983 static int iwl_mac_setup_register(struct iwl_priv *priv,
984 struct iwlagn_ucode_capabilities *capa);
985
986 #define UCODE_EXPERIMENTAL_INDEX 100
987 #define UCODE_EXPERIMENTAL_TAG "exp"
988
989 static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first)
990 {
991 const char *name_pre = priv->cfg->fw_name_pre;
992 char tag[8];
993
994 if (first) {
995 #ifdef CONFIG_IWLWIFI_DEBUG_EXPERIMENTAL_UCODE
996 priv->fw_index = UCODE_EXPERIMENTAL_INDEX;
997 strcpy(tag, UCODE_EXPERIMENTAL_TAG);
998 } else if (priv->fw_index == UCODE_EXPERIMENTAL_INDEX) {
999 #endif
1000 priv->fw_index = priv->cfg->ucode_api_max;
1001 sprintf(tag, "%d", priv->fw_index);
1002 } else {
1003 priv->fw_index--;
1004 sprintf(tag, "%d", priv->fw_index);
1005 }
1006
1007 if (priv->fw_index < priv->cfg->ucode_api_min) {
1008 IWL_ERR(priv, "no suitable firmware found!\n");
1009 return -ENOENT;
1010 }
1011
1012 sprintf(priv->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
1013
1014 IWL_DEBUG_INFO(priv, "attempting to load firmware %s'%s'\n",
1015 (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1016 ? "EXPERIMENTAL " : "",
1017 priv->firmware_name);
1018
1019 return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name,
1020 priv->bus.dev,
1021 GFP_KERNEL, priv, iwl_ucode_callback);
1022 }
1023
1024 struct iwlagn_firmware_pieces {
1025 const void *inst, *data, *init, *init_data;
1026 size_t inst_size, data_size, init_size, init_data_size;
1027
1028 u32 build;
1029
1030 u32 init_evtlog_ptr, init_evtlog_size, init_errlog_ptr;
1031 u32 inst_evtlog_ptr, inst_evtlog_size, inst_errlog_ptr;
1032 };
1033
1034 static int iwlagn_load_legacy_firmware(struct iwl_priv *priv,
1035 const struct firmware *ucode_raw,
1036 struct iwlagn_firmware_pieces *pieces)
1037 {
1038 struct iwl_ucode_header *ucode = (void *)ucode_raw->data;
1039 u32 api_ver, hdr_size;
1040 const u8 *src;
1041
1042 priv->ucode_ver = le32_to_cpu(ucode->ver);
1043 api_ver = IWL_UCODE_API(priv->ucode_ver);
1044
1045 switch (api_ver) {
1046 default:
1047 hdr_size = 28;
1048 if (ucode_raw->size < hdr_size) {
1049 IWL_ERR(priv, "File size too small!\n");
1050 return -EINVAL;
1051 }
1052 pieces->build = le32_to_cpu(ucode->u.v2.build);
1053 pieces->inst_size = le32_to_cpu(ucode->u.v2.inst_size);
1054 pieces->data_size = le32_to_cpu(ucode->u.v2.data_size);
1055 pieces->init_size = le32_to_cpu(ucode->u.v2.init_size);
1056 pieces->init_data_size = le32_to_cpu(ucode->u.v2.init_data_size);
1057 src = ucode->u.v2.data;
1058 break;
1059 case 0:
1060 case 1:
1061 case 2:
1062 hdr_size = 24;
1063 if (ucode_raw->size < hdr_size) {
1064 IWL_ERR(priv, "File size too small!\n");
1065 return -EINVAL;
1066 }
1067 pieces->build = 0;
1068 pieces->inst_size = le32_to_cpu(ucode->u.v1.inst_size);
1069 pieces->data_size = le32_to_cpu(ucode->u.v1.data_size);
1070 pieces->init_size = le32_to_cpu(ucode->u.v1.init_size);
1071 pieces->init_data_size = le32_to_cpu(ucode->u.v1.init_data_size);
1072 src = ucode->u.v1.data;
1073 break;
1074 }
1075
1076 /* Verify size of file vs. image size info in file's header */
1077 if (ucode_raw->size != hdr_size + pieces->inst_size +
1078 pieces->data_size + pieces->init_size +
1079 pieces->init_data_size) {
1080
1081 IWL_ERR(priv,
1082 "uCode file size %d does not match expected size\n",
1083 (int)ucode_raw->size);
1084 return -EINVAL;
1085 }
1086
1087 pieces->inst = src;
1088 src += pieces->inst_size;
1089 pieces->data = src;
1090 src += pieces->data_size;
1091 pieces->init = src;
1092 src += pieces->init_size;
1093 pieces->init_data = src;
1094 src += pieces->init_data_size;
1095
1096 return 0;
1097 }
1098
1099 static int iwlagn_wanted_ucode_alternative = 1;
1100
1101 static int iwlagn_load_firmware(struct iwl_priv *priv,
1102 const struct firmware *ucode_raw,
1103 struct iwlagn_firmware_pieces *pieces,
1104 struct iwlagn_ucode_capabilities *capa)
1105 {
1106 struct iwl_tlv_ucode_header *ucode = (void *)ucode_raw->data;
1107 struct iwl_ucode_tlv *tlv;
1108 size_t len = ucode_raw->size;
1109 const u8 *data;
1110 int wanted_alternative = iwlagn_wanted_ucode_alternative, tmp;
1111 u64 alternatives;
1112 u32 tlv_len;
1113 enum iwl_ucode_tlv_type tlv_type;
1114 const u8 *tlv_data;
1115
1116 if (len < sizeof(*ucode)) {
1117 IWL_ERR(priv, "uCode has invalid length: %zd\n", len);
1118 return -EINVAL;
1119 }
1120
1121 if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC)) {
1122 IWL_ERR(priv, "invalid uCode magic: 0X%x\n",
1123 le32_to_cpu(ucode->magic));
1124 return -EINVAL;
1125 }
1126
1127 /*
1128 * Check which alternatives are present, and "downgrade"
1129 * when the chosen alternative is not present, warning
1130 * the user when that happens. Some files may not have
1131 * any alternatives, so don't warn in that case.
1132 */
1133 alternatives = le64_to_cpu(ucode->alternatives);
1134 tmp = wanted_alternative;
1135 if (wanted_alternative > 63)
1136 wanted_alternative = 63;
1137 while (wanted_alternative && !(alternatives & BIT(wanted_alternative)))
1138 wanted_alternative--;
1139 if (wanted_alternative && wanted_alternative != tmp)
1140 IWL_WARN(priv,
1141 "uCode alternative %d not available, choosing %d\n",
1142 tmp, wanted_alternative);
1143
1144 priv->ucode_ver = le32_to_cpu(ucode->ver);
1145 pieces->build = le32_to_cpu(ucode->build);
1146 data = ucode->data;
1147
1148 len -= sizeof(*ucode);
1149
1150 while (len >= sizeof(*tlv)) {
1151 u16 tlv_alt;
1152
1153 len -= sizeof(*tlv);
1154 tlv = (void *)data;
1155
1156 tlv_len = le32_to_cpu(tlv->length);
1157 tlv_type = le16_to_cpu(tlv->type);
1158 tlv_alt = le16_to_cpu(tlv->alternative);
1159 tlv_data = tlv->data;
1160
1161 if (len < tlv_len) {
1162 IWL_ERR(priv, "invalid TLV len: %zd/%u\n",
1163 len, tlv_len);
1164 return -EINVAL;
1165 }
1166 len -= ALIGN(tlv_len, 4);
1167 data += sizeof(*tlv) + ALIGN(tlv_len, 4);
1168
1169 /*
1170 * Alternative 0 is always valid.
1171 *
1172 * Skip alternative TLVs that are not selected.
1173 */
1174 if (tlv_alt != 0 && tlv_alt != wanted_alternative)
1175 continue;
1176
1177 switch (tlv_type) {
1178 case IWL_UCODE_TLV_INST:
1179 pieces->inst = tlv_data;
1180 pieces->inst_size = tlv_len;
1181 break;
1182 case IWL_UCODE_TLV_DATA:
1183 pieces->data = tlv_data;
1184 pieces->data_size = tlv_len;
1185 break;
1186 case IWL_UCODE_TLV_INIT:
1187 pieces->init = tlv_data;
1188 pieces->init_size = tlv_len;
1189 break;
1190 case IWL_UCODE_TLV_INIT_DATA:
1191 pieces->init_data = tlv_data;
1192 pieces->init_data_size = tlv_len;
1193 break;
1194 case IWL_UCODE_TLV_BOOT:
1195 IWL_ERR(priv, "Found unexpected BOOT ucode\n");
1196 break;
1197 case IWL_UCODE_TLV_PROBE_MAX_LEN:
1198 if (tlv_len != sizeof(u32))
1199 goto invalid_tlv_len;
1200 capa->max_probe_length =
1201 le32_to_cpup((__le32 *)tlv_data);
1202 break;
1203 case IWL_UCODE_TLV_PAN:
1204 if (tlv_len)
1205 goto invalid_tlv_len;
1206 capa->flags |= IWL_UCODE_TLV_FLAGS_PAN;
1207 break;
1208 case IWL_UCODE_TLV_FLAGS:
1209 /* must be at least one u32 */
1210 if (tlv_len < sizeof(u32))
1211 goto invalid_tlv_len;
1212 /* and a proper number of u32s */
1213 if (tlv_len % sizeof(u32))
1214 goto invalid_tlv_len;
1215 /*
1216 * This driver only reads the first u32 as
1217 * right now no more features are defined,
1218 * if that changes then either the driver
1219 * will not work with the new firmware, or
1220 * it'll not take advantage of new features.
1221 */
1222 capa->flags = le32_to_cpup((__le32 *)tlv_data);
1223 break;
1224 case IWL_UCODE_TLV_INIT_EVTLOG_PTR:
1225 if (tlv_len != sizeof(u32))
1226 goto invalid_tlv_len;
1227 pieces->init_evtlog_ptr =
1228 le32_to_cpup((__le32 *)tlv_data);
1229 break;
1230 case IWL_UCODE_TLV_INIT_EVTLOG_SIZE:
1231 if (tlv_len != sizeof(u32))
1232 goto invalid_tlv_len;
1233 pieces->init_evtlog_size =
1234 le32_to_cpup((__le32 *)tlv_data);
1235 break;
1236 case IWL_UCODE_TLV_INIT_ERRLOG_PTR:
1237 if (tlv_len != sizeof(u32))
1238 goto invalid_tlv_len;
1239 pieces->init_errlog_ptr =
1240 le32_to_cpup((__le32 *)tlv_data);
1241 break;
1242 case IWL_UCODE_TLV_RUNT_EVTLOG_PTR:
1243 if (tlv_len != sizeof(u32))
1244 goto invalid_tlv_len;
1245 pieces->inst_evtlog_ptr =
1246 le32_to_cpup((__le32 *)tlv_data);
1247 break;
1248 case IWL_UCODE_TLV_RUNT_EVTLOG_SIZE:
1249 if (tlv_len != sizeof(u32))
1250 goto invalid_tlv_len;
1251 pieces->inst_evtlog_size =
1252 le32_to_cpup((__le32 *)tlv_data);
1253 break;
1254 case IWL_UCODE_TLV_RUNT_ERRLOG_PTR:
1255 if (tlv_len != sizeof(u32))
1256 goto invalid_tlv_len;
1257 pieces->inst_errlog_ptr =
1258 le32_to_cpup((__le32 *)tlv_data);
1259 break;
1260 case IWL_UCODE_TLV_ENHANCE_SENS_TBL:
1261 if (tlv_len)
1262 goto invalid_tlv_len;
1263 priv->enhance_sensitivity_table = true;
1264 break;
1265 case IWL_UCODE_TLV_PHY_CALIBRATION_SIZE:
1266 if (tlv_len != sizeof(u32))
1267 goto invalid_tlv_len;
1268 capa->standard_phy_calibration_size =
1269 le32_to_cpup((__le32 *)tlv_data);
1270 break;
1271 default:
1272 IWL_DEBUG_INFO(priv, "unknown TLV: %d\n", tlv_type);
1273 break;
1274 }
1275 }
1276
1277 if (len) {
1278 IWL_ERR(priv, "invalid TLV after parsing: %zd\n", len);
1279 iwl_print_hex_dump(priv, IWL_DL_FW, (u8 *)data, len);
1280 return -EINVAL;
1281 }
1282
1283 return 0;
1284
1285 invalid_tlv_len:
1286 IWL_ERR(priv, "TLV %d has invalid size: %u\n", tlv_type, tlv_len);
1287 iwl_print_hex_dump(priv, IWL_DL_FW, tlv_data, tlv_len);
1288
1289 return -EINVAL;
1290 }
1291
1292 /**
1293 * iwl_ucode_callback - callback when firmware was loaded
1294 *
1295 * If loaded successfully, copies the firmware into buffers
1296 * for the card to fetch (via DMA).
1297 */
1298 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
1299 {
1300 struct iwl_priv *priv = context;
1301 struct iwl_ucode_header *ucode;
1302 int err;
1303 struct iwlagn_firmware_pieces pieces;
1304 const unsigned int api_max = priv->cfg->ucode_api_max;
1305 const unsigned int api_min = priv->cfg->ucode_api_min;
1306 u32 api_ver;
1307 char buildstr[25];
1308 u32 build;
1309 struct iwlagn_ucode_capabilities ucode_capa = {
1310 .max_probe_length = 200,
1311 .standard_phy_calibration_size =
1312 IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE,
1313 };
1314
1315 memset(&pieces, 0, sizeof(pieces));
1316
1317 if (!ucode_raw) {
1318 if (priv->fw_index <= priv->cfg->ucode_api_max)
1319 IWL_ERR(priv,
1320 "request for firmware file '%s' failed.\n",
1321 priv->firmware_name);
1322 goto try_again;
1323 }
1324
1325 IWL_DEBUG_INFO(priv, "Loaded firmware file '%s' (%zd bytes).\n",
1326 priv->firmware_name, ucode_raw->size);
1327
1328 /* Make sure that we got at least the API version number */
1329 if (ucode_raw->size < 4) {
1330 IWL_ERR(priv, "File size way too small!\n");
1331 goto try_again;
1332 }
1333
1334 /* Data from ucode file: header followed by uCode images */
1335 ucode = (struct iwl_ucode_header *)ucode_raw->data;
1336
1337 if (ucode->ver)
1338 err = iwlagn_load_legacy_firmware(priv, ucode_raw, &pieces);
1339 else
1340 err = iwlagn_load_firmware(priv, ucode_raw, &pieces,
1341 &ucode_capa);
1342
1343 if (err)
1344 goto try_again;
1345
1346 api_ver = IWL_UCODE_API(priv->ucode_ver);
1347 build = pieces.build;
1348
1349 /*
1350 * api_ver should match the api version forming part of the
1351 * firmware filename ... but we don't check for that and only rely
1352 * on the API version read from firmware header from here on forward
1353 */
1354 /* no api version check required for experimental uCode */
1355 if (priv->fw_index != UCODE_EXPERIMENTAL_INDEX) {
1356 if (api_ver < api_min || api_ver > api_max) {
1357 IWL_ERR(priv,
1358 "Driver unable to support your firmware API. "
1359 "Driver supports v%u, firmware is v%u.\n",
1360 api_max, api_ver);
1361 goto try_again;
1362 }
1363
1364 if (api_ver != api_max)
1365 IWL_ERR(priv,
1366 "Firmware has old API version. Expected v%u, "
1367 "got v%u. New firmware can be obtained "
1368 "from http://www.intellinuxwireless.org.\n",
1369 api_max, api_ver);
1370 }
1371
1372 if (build)
1373 sprintf(buildstr, " build %u%s", build,
1374 (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1375 ? " (EXP)" : "");
1376 else
1377 buildstr[0] = '\0';
1378
1379 IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u%s\n",
1380 IWL_UCODE_MAJOR(priv->ucode_ver),
1381 IWL_UCODE_MINOR(priv->ucode_ver),
1382 IWL_UCODE_API(priv->ucode_ver),
1383 IWL_UCODE_SERIAL(priv->ucode_ver),
1384 buildstr);
1385
1386 snprintf(priv->hw->wiphy->fw_version,
1387 sizeof(priv->hw->wiphy->fw_version),
1388 "%u.%u.%u.%u%s",
1389 IWL_UCODE_MAJOR(priv->ucode_ver),
1390 IWL_UCODE_MINOR(priv->ucode_ver),
1391 IWL_UCODE_API(priv->ucode_ver),
1392 IWL_UCODE_SERIAL(priv->ucode_ver),
1393 buildstr);
1394
1395 /*
1396 * For any of the failures below (before allocating pci memory)
1397 * we will try to load a version with a smaller API -- maybe the
1398 * user just got a corrupted version of the latest API.
1399 */
1400
1401 IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1402 priv->ucode_ver);
1403 IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %Zd\n",
1404 pieces.inst_size);
1405 IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %Zd\n",
1406 pieces.data_size);
1407 IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %Zd\n",
1408 pieces.init_size);
1409 IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %Zd\n",
1410 pieces.init_data_size);
1411
1412 /* Verify that uCode images will fit in card's SRAM */
1413 if (pieces.inst_size > priv->hw_params.max_inst_size) {
1414 IWL_ERR(priv, "uCode instr len %Zd too large to fit in\n",
1415 pieces.inst_size);
1416 goto try_again;
1417 }
1418
1419 if (pieces.data_size > priv->hw_params.max_data_size) {
1420 IWL_ERR(priv, "uCode data len %Zd too large to fit in\n",
1421 pieces.data_size);
1422 goto try_again;
1423 }
1424
1425 if (pieces.init_size > priv->hw_params.max_inst_size) {
1426 IWL_ERR(priv, "uCode init instr len %Zd too large to fit in\n",
1427 pieces.init_size);
1428 goto try_again;
1429 }
1430
1431 if (pieces.init_data_size > priv->hw_params.max_data_size) {
1432 IWL_ERR(priv, "uCode init data len %Zd too large to fit in\n",
1433 pieces.init_data_size);
1434 goto try_again;
1435 }
1436
1437 /* Allocate ucode buffers for card's bus-master loading ... */
1438
1439 /* Runtime instructions and 2 copies of data:
1440 * 1) unmodified from disk
1441 * 2) backup cache for save/restore during power-downs */
1442 if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.code,
1443 pieces.inst, pieces.inst_size))
1444 goto err_pci_alloc;
1445 if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.data,
1446 pieces.data, pieces.data_size))
1447 goto err_pci_alloc;
1448
1449 /* Initialization instructions and data */
1450 if (pieces.init_size && pieces.init_data_size) {
1451 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.code,
1452 pieces.init, pieces.init_size))
1453 goto err_pci_alloc;
1454 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.data,
1455 pieces.init_data, pieces.init_data_size))
1456 goto err_pci_alloc;
1457 }
1458
1459 /* Now that we can no longer fail, copy information */
1460
1461 /*
1462 * The (size - 16) / 12 formula is based on the information recorded
1463 * for each event, which is of mode 1 (including timestamp) for all
1464 * new microcodes that include this information.
1465 */
1466 priv->_agn.init_evtlog_ptr = pieces.init_evtlog_ptr;
1467 if (pieces.init_evtlog_size)
1468 priv->_agn.init_evtlog_size = (pieces.init_evtlog_size - 16)/12;
1469 else
1470 priv->_agn.init_evtlog_size =
1471 priv->cfg->base_params->max_event_log_size;
1472 priv->_agn.init_errlog_ptr = pieces.init_errlog_ptr;
1473 priv->_agn.inst_evtlog_ptr = pieces.inst_evtlog_ptr;
1474 if (pieces.inst_evtlog_size)
1475 priv->_agn.inst_evtlog_size = (pieces.inst_evtlog_size - 16)/12;
1476 else
1477 priv->_agn.inst_evtlog_size =
1478 priv->cfg->base_params->max_event_log_size;
1479 priv->_agn.inst_errlog_ptr = pieces.inst_errlog_ptr;
1480
1481 priv->new_scan_threshold_behaviour =
1482 !!(ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1483
1484 if ((priv->cfg->sku & EEPROM_SKU_CAP_IPAN_ENABLE) &&
1485 (ucode_capa.flags & IWL_UCODE_TLV_FLAGS_PAN)) {
1486 priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
1487 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1488 } else
1489 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1490
1491 if (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS))
1492 priv->cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1493 else
1494 priv->cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1495
1496 /*
1497 * figure out the offset of chain noise reset and gain commands
1498 * base on the size of standard phy calibration commands table size
1499 */
1500 if (ucode_capa.standard_phy_calibration_size >
1501 IWL_MAX_PHY_CALIBRATE_TBL_SIZE)
1502 ucode_capa.standard_phy_calibration_size =
1503 IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE;
1504
1505 priv->_agn.phy_calib_chain_noise_reset_cmd =
1506 ucode_capa.standard_phy_calibration_size;
1507 priv->_agn.phy_calib_chain_noise_gain_cmd =
1508 ucode_capa.standard_phy_calibration_size + 1;
1509
1510 /**************************************************
1511 * This is still part of probe() in a sense...
1512 *
1513 * 9. Setup and register with mac80211 and debugfs
1514 **************************************************/
1515 err = iwl_mac_setup_register(priv, &ucode_capa);
1516 if (err)
1517 goto out_unbind;
1518
1519 err = iwl_dbgfs_register(priv, DRV_NAME);
1520 if (err)
1521 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
1522
1523 err = sysfs_create_group(&(priv->bus.dev->kobj),
1524 &iwl_attribute_group);
1525 if (err) {
1526 IWL_ERR(priv, "failed to create sysfs device attributes\n");
1527 goto out_unbind;
1528 }
1529
1530 /* We have our copies now, allow OS release its copies */
1531 release_firmware(ucode_raw);
1532 complete(&priv->_agn.firmware_loading_complete);
1533 return;
1534
1535 try_again:
1536 /* try next, if any */
1537 if (iwl_request_firmware(priv, false))
1538 goto out_unbind;
1539 release_firmware(ucode_raw);
1540 return;
1541
1542 err_pci_alloc:
1543 IWL_ERR(priv, "failed to allocate pci memory\n");
1544 iwl_dealloc_ucode(priv);
1545 out_unbind:
1546 complete(&priv->_agn.firmware_loading_complete);
1547 device_release_driver(priv->bus.dev);
1548 release_firmware(ucode_raw);
1549 }
1550
1551 static const char *desc_lookup_text[] = {
1552 "OK",
1553 "FAIL",
1554 "BAD_PARAM",
1555 "BAD_CHECKSUM",
1556 "NMI_INTERRUPT_WDG",
1557 "SYSASSERT",
1558 "FATAL_ERROR",
1559 "BAD_COMMAND",
1560 "HW_ERROR_TUNE_LOCK",
1561 "HW_ERROR_TEMPERATURE",
1562 "ILLEGAL_CHAN_FREQ",
1563 "VCC_NOT_STABLE",
1564 "FH_ERROR",
1565 "NMI_INTERRUPT_HOST",
1566 "NMI_INTERRUPT_ACTION_PT",
1567 "NMI_INTERRUPT_UNKNOWN",
1568 "UCODE_VERSION_MISMATCH",
1569 "HW_ERROR_ABS_LOCK",
1570 "HW_ERROR_CAL_LOCK_FAIL",
1571 "NMI_INTERRUPT_INST_ACTION_PT",
1572 "NMI_INTERRUPT_DATA_ACTION_PT",
1573 "NMI_TRM_HW_ER",
1574 "NMI_INTERRUPT_TRM",
1575 "NMI_INTERRUPT_BREAK_POINT"
1576 "DEBUG_0",
1577 "DEBUG_1",
1578 "DEBUG_2",
1579 "DEBUG_3",
1580 };
1581
1582 static struct { char *name; u8 num; } advanced_lookup[] = {
1583 { "NMI_INTERRUPT_WDG", 0x34 },
1584 { "SYSASSERT", 0x35 },
1585 { "UCODE_VERSION_MISMATCH", 0x37 },
1586 { "BAD_COMMAND", 0x38 },
1587 { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
1588 { "FATAL_ERROR", 0x3D },
1589 { "NMI_TRM_HW_ERR", 0x46 },
1590 { "NMI_INTERRUPT_TRM", 0x4C },
1591 { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
1592 { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
1593 { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
1594 { "NMI_INTERRUPT_HOST", 0x66 },
1595 { "NMI_INTERRUPT_ACTION_PT", 0x7C },
1596 { "NMI_INTERRUPT_UNKNOWN", 0x84 },
1597 { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
1598 { "ADVANCED_SYSASSERT", 0 },
1599 };
1600
1601 static const char *desc_lookup(u32 num)
1602 {
1603 int i;
1604 int max = ARRAY_SIZE(desc_lookup_text);
1605
1606 if (num < max)
1607 return desc_lookup_text[num];
1608
1609 max = ARRAY_SIZE(advanced_lookup) - 1;
1610 for (i = 0; i < max; i++) {
1611 if (advanced_lookup[i].num == num)
1612 break;
1613 }
1614 return advanced_lookup[i].name;
1615 }
1616
1617 #define ERROR_START_OFFSET (1 * sizeof(u32))
1618 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
1619
1620 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1621 {
1622 u32 base;
1623 struct iwl_error_event_table table;
1624
1625 base = priv->device_pointers.error_event_table;
1626 if (priv->ucode_type == IWL_UCODE_INIT) {
1627 if (!base)
1628 base = priv->_agn.init_errlog_ptr;
1629 } else {
1630 if (!base)
1631 base = priv->_agn.inst_errlog_ptr;
1632 }
1633
1634 if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1635 IWL_ERR(priv,
1636 "Not valid error log pointer 0x%08X for %s uCode\n",
1637 base,
1638 (priv->ucode_type == IWL_UCODE_INIT)
1639 ? "Init" : "RT");
1640 return;
1641 }
1642
1643 iwl_read_targ_mem_words(priv, base, &table, sizeof(table));
1644
1645 if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
1646 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1647 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1648 priv->status, table.valid);
1649 }
1650
1651 priv->isr_stats.err_code = table.error_id;
1652
1653 trace_iwlwifi_dev_ucode_error(priv, table.error_id, table.tsf_low,
1654 table.data1, table.data2, table.line,
1655 table.blink1, table.blink2, table.ilink1,
1656 table.ilink2, table.bcon_time, table.gp1,
1657 table.gp2, table.gp3, table.ucode_ver,
1658 table.hw_ver, table.brd_ver);
1659 IWL_ERR(priv, "0x%08X | %-28s\n", table.error_id,
1660 desc_lookup(table.error_id));
1661 IWL_ERR(priv, "0x%08X | uPc\n", table.pc);
1662 IWL_ERR(priv, "0x%08X | branchlink1\n", table.blink1);
1663 IWL_ERR(priv, "0x%08X | branchlink2\n", table.blink2);
1664 IWL_ERR(priv, "0x%08X | interruptlink1\n", table.ilink1);
1665 IWL_ERR(priv, "0x%08X | interruptlink2\n", table.ilink2);
1666 IWL_ERR(priv, "0x%08X | data1\n", table.data1);
1667 IWL_ERR(priv, "0x%08X | data2\n", table.data2);
1668 IWL_ERR(priv, "0x%08X | line\n", table.line);
1669 IWL_ERR(priv, "0x%08X | beacon time\n", table.bcon_time);
1670 IWL_ERR(priv, "0x%08X | tsf low\n", table.tsf_low);
1671 IWL_ERR(priv, "0x%08X | tsf hi\n", table.tsf_hi);
1672 IWL_ERR(priv, "0x%08X | time gp1\n", table.gp1);
1673 IWL_ERR(priv, "0x%08X | time gp2\n", table.gp2);
1674 IWL_ERR(priv, "0x%08X | time gp3\n", table.gp3);
1675 IWL_ERR(priv, "0x%08X | uCode version\n", table.ucode_ver);
1676 IWL_ERR(priv, "0x%08X | hw version\n", table.hw_ver);
1677 IWL_ERR(priv, "0x%08X | board version\n", table.brd_ver);
1678 IWL_ERR(priv, "0x%08X | hcmd\n", table.hcmd);
1679 }
1680
1681 #define EVENT_START_OFFSET (4 * sizeof(u32))
1682
1683 /**
1684 * iwl_print_event_log - Dump error event log to syslog
1685 *
1686 */
1687 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1688 u32 num_events, u32 mode,
1689 int pos, char **buf, size_t bufsz)
1690 {
1691 u32 i;
1692 u32 base; /* SRAM byte address of event log header */
1693 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1694 u32 ptr; /* SRAM byte address of log data */
1695 u32 ev, time, data; /* event log data */
1696 unsigned long reg_flags;
1697
1698 if (num_events == 0)
1699 return pos;
1700
1701 base = priv->device_pointers.log_event_table;
1702 if (priv->ucode_type == IWL_UCODE_INIT) {
1703 if (!base)
1704 base = priv->_agn.init_evtlog_ptr;
1705 } else {
1706 if (!base)
1707 base = priv->_agn.inst_evtlog_ptr;
1708 }
1709
1710 if (mode == 0)
1711 event_size = 2 * sizeof(u32);
1712 else
1713 event_size = 3 * sizeof(u32);
1714
1715 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1716
1717 /* Make sure device is powered up for SRAM reads */
1718 spin_lock_irqsave(&priv->reg_lock, reg_flags);
1719 iwl_grab_nic_access(priv);
1720
1721 /* Set starting address; reads will auto-increment */
1722 iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
1723 rmb();
1724
1725 /* "time" is actually "data" for mode 0 (no timestamp).
1726 * place event id # at far right for easier visual parsing. */
1727 for (i = 0; i < num_events; i++) {
1728 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1729 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1730 if (mode == 0) {
1731 /* data, ev */
1732 if (bufsz) {
1733 pos += scnprintf(*buf + pos, bufsz - pos,
1734 "EVT_LOG:0x%08x:%04u\n",
1735 time, ev);
1736 } else {
1737 trace_iwlwifi_dev_ucode_event(priv, 0,
1738 time, ev);
1739 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1740 time, ev);
1741 }
1742 } else {
1743 data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1744 if (bufsz) {
1745 pos += scnprintf(*buf + pos, bufsz - pos,
1746 "EVT_LOGT:%010u:0x%08x:%04u\n",
1747 time, data, ev);
1748 } else {
1749 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1750 time, data, ev);
1751 trace_iwlwifi_dev_ucode_event(priv, time,
1752 data, ev);
1753 }
1754 }
1755 }
1756
1757 /* Allow device to power down */
1758 iwl_release_nic_access(priv);
1759 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1760 return pos;
1761 }
1762
1763 /**
1764 * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1765 */
1766 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1767 u32 num_wraps, u32 next_entry,
1768 u32 size, u32 mode,
1769 int pos, char **buf, size_t bufsz)
1770 {
1771 /*
1772 * display the newest DEFAULT_LOG_ENTRIES entries
1773 * i.e the entries just before the next ont that uCode would fill.
1774 */
1775 if (num_wraps) {
1776 if (next_entry < size) {
1777 pos = iwl_print_event_log(priv,
1778 capacity - (size - next_entry),
1779 size - next_entry, mode,
1780 pos, buf, bufsz);
1781 pos = iwl_print_event_log(priv, 0,
1782 next_entry, mode,
1783 pos, buf, bufsz);
1784 } else
1785 pos = iwl_print_event_log(priv, next_entry - size,
1786 size, mode, pos, buf, bufsz);
1787 } else {
1788 if (next_entry < size) {
1789 pos = iwl_print_event_log(priv, 0, next_entry,
1790 mode, pos, buf, bufsz);
1791 } else {
1792 pos = iwl_print_event_log(priv, next_entry - size,
1793 size, mode, pos, buf, bufsz);
1794 }
1795 }
1796 return pos;
1797 }
1798
1799 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1800
1801 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1802 char **buf, bool display)
1803 {
1804 u32 base; /* SRAM byte address of event log header */
1805 u32 capacity; /* event log capacity in # entries */
1806 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
1807 u32 num_wraps; /* # times uCode wrapped to top of log */
1808 u32 next_entry; /* index of next entry to be written by uCode */
1809 u32 size; /* # entries that we'll print */
1810 u32 logsize;
1811 int pos = 0;
1812 size_t bufsz = 0;
1813
1814 base = priv->device_pointers.log_event_table;
1815 if (priv->ucode_type == IWL_UCODE_INIT) {
1816 logsize = priv->_agn.init_evtlog_size;
1817 if (!base)
1818 base = priv->_agn.init_evtlog_ptr;
1819 } else {
1820 logsize = priv->_agn.inst_evtlog_size;
1821 if (!base)
1822 base = priv->_agn.inst_evtlog_ptr;
1823 }
1824
1825 if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1826 IWL_ERR(priv,
1827 "Invalid event log pointer 0x%08X for %s uCode\n",
1828 base,
1829 (priv->ucode_type == IWL_UCODE_INIT)
1830 ? "Init" : "RT");
1831 return -EINVAL;
1832 }
1833
1834 /* event log header */
1835 capacity = iwl_read_targ_mem(priv, base);
1836 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1837 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1838 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1839
1840 if (capacity > logsize) {
1841 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1842 capacity, logsize);
1843 capacity = logsize;
1844 }
1845
1846 if (next_entry > logsize) {
1847 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1848 next_entry, logsize);
1849 next_entry = logsize;
1850 }
1851
1852 size = num_wraps ? capacity : next_entry;
1853
1854 /* bail out if nothing in log */
1855 if (size == 0) {
1856 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1857 return pos;
1858 }
1859
1860 /* enable/disable bt channel inhibition */
1861 priv->bt_ch_announce = iwlagn_bt_ch_announce;
1862
1863 #ifdef CONFIG_IWLWIFI_DEBUG
1864 if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1865 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1866 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1867 #else
1868 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1869 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1870 #endif
1871 IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
1872 size);
1873
1874 #ifdef CONFIG_IWLWIFI_DEBUG
1875 if (display) {
1876 if (full_log)
1877 bufsz = capacity * 48;
1878 else
1879 bufsz = size * 48;
1880 *buf = kmalloc(bufsz, GFP_KERNEL);
1881 if (!*buf)
1882 return -ENOMEM;
1883 }
1884 if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1885 /*
1886 * if uCode has wrapped back to top of log,
1887 * start at the oldest entry,
1888 * i.e the next one that uCode would fill.
1889 */
1890 if (num_wraps)
1891 pos = iwl_print_event_log(priv, next_entry,
1892 capacity - next_entry, mode,
1893 pos, buf, bufsz);
1894 /* (then/else) start at top of log */
1895 pos = iwl_print_event_log(priv, 0,
1896 next_entry, mode, pos, buf, bufsz);
1897 } else
1898 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1899 next_entry, size, mode,
1900 pos, buf, bufsz);
1901 #else
1902 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1903 next_entry, size, mode,
1904 pos, buf, bufsz);
1905 #endif
1906 return pos;
1907 }
1908
1909 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1910 {
1911 struct iwl_ct_kill_config cmd;
1912 struct iwl_ct_kill_throttling_config adv_cmd;
1913 unsigned long flags;
1914 int ret = 0;
1915
1916 spin_lock_irqsave(&priv->lock, flags);
1917 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1918 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1919 spin_unlock_irqrestore(&priv->lock, flags);
1920 priv->thermal_throttle.ct_kill_toggle = false;
1921
1922 if (priv->cfg->base_params->support_ct_kill_exit) {
1923 adv_cmd.critical_temperature_enter =
1924 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1925 adv_cmd.critical_temperature_exit =
1926 cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1927
1928 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1929 sizeof(adv_cmd), &adv_cmd);
1930 if (ret)
1931 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1932 else
1933 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1934 "succeeded, "
1935 "critical temperature enter is %d,"
1936 "exit is %d\n",
1937 priv->hw_params.ct_kill_threshold,
1938 priv->hw_params.ct_kill_exit_threshold);
1939 } else {
1940 cmd.critical_temperature_R =
1941 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1942
1943 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1944 sizeof(cmd), &cmd);
1945 if (ret)
1946 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1947 else
1948 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1949 "succeeded, "
1950 "critical temperature is %d\n",
1951 priv->hw_params.ct_kill_threshold);
1952 }
1953 }
1954
1955 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
1956 {
1957 struct iwl_calib_cfg_cmd calib_cfg_cmd;
1958 struct iwl_host_cmd cmd = {
1959 .id = CALIBRATION_CFG_CMD,
1960 .len = { sizeof(struct iwl_calib_cfg_cmd), },
1961 .data = { &calib_cfg_cmd, },
1962 };
1963
1964 memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
1965 calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_INIT_CFG_ALL;
1966 calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
1967
1968 return iwl_send_cmd(priv, &cmd);
1969 }
1970
1971
1972 /**
1973 * iwl_alive_start - called after REPLY_ALIVE notification received
1974 * from protocol/runtime uCode (initialization uCode's
1975 * Alive gets handled by iwl_init_alive_start()).
1976 */
1977 int iwl_alive_start(struct iwl_priv *priv)
1978 {
1979 int ret = 0;
1980 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1981
1982 iwl_reset_ict(priv);
1983
1984 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1985
1986 /* After the ALIVE response, we can send host commands to the uCode */
1987 set_bit(STATUS_ALIVE, &priv->status);
1988
1989 /* Enable watchdog to monitor the driver tx queues */
1990 iwl_setup_watchdog(priv);
1991
1992 if (iwl_is_rfkill(priv))
1993 return -ERFKILL;
1994
1995 /* download priority table before any calibration request */
1996 if (priv->cfg->bt_params &&
1997 priv->cfg->bt_params->advanced_bt_coexist) {
1998 /* Configure Bluetooth device coexistence support */
1999 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
2000 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
2001 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
2002 priv->cfg->ops->hcmd->send_bt_config(priv);
2003 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
2004 iwlagn_send_prio_tbl(priv);
2005
2006 /* FIXME: w/a to force change uCode BT state machine */
2007 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
2008 BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2009 if (ret)
2010 return ret;
2011 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
2012 BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2013 if (ret)
2014 return ret;
2015 }
2016 if (priv->hw_params.calib_rt_cfg)
2017 iwlagn_send_calib_cfg_rt(priv, priv->hw_params.calib_rt_cfg);
2018
2019 ieee80211_wake_queues(priv->hw);
2020
2021 priv->active_rate = IWL_RATES_MASK;
2022
2023 /* Configure Tx antenna selection based on H/W config */
2024 if (priv->cfg->ops->hcmd->set_tx_ant)
2025 priv->cfg->ops->hcmd->set_tx_ant(priv, priv->cfg->valid_tx_ant);
2026
2027 if (iwl_is_associated_ctx(ctx)) {
2028 struct iwl_rxon_cmd *active_rxon =
2029 (struct iwl_rxon_cmd *)&ctx->active;
2030 /* apply any changes in staging */
2031 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2032 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2033 } else {
2034 struct iwl_rxon_context *tmp;
2035 /* Initialize our rx_config data */
2036 for_each_context(priv, tmp)
2037 iwl_connection_init_rx_config(priv, tmp);
2038
2039 if (priv->cfg->ops->hcmd->set_rxon_chain)
2040 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2041 }
2042
2043 if (!priv->cfg->bt_params || (priv->cfg->bt_params &&
2044 !priv->cfg->bt_params->advanced_bt_coexist)) {
2045 /*
2046 * default is 2-wire BT coexexistence support
2047 */
2048 priv->cfg->ops->hcmd->send_bt_config(priv);
2049 }
2050
2051 iwl_reset_run_time_calib(priv);
2052
2053 set_bit(STATUS_READY, &priv->status);
2054
2055 /* Configure the adapter for unassociated operation */
2056 ret = iwlagn_commit_rxon(priv, ctx);
2057 if (ret)
2058 return ret;
2059
2060 /* At this point, the NIC is initialized and operational */
2061 iwl_rf_kill_ct_config(priv);
2062
2063 IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2064
2065 return iwl_power_update_mode(priv, true);
2066 }
2067
2068 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2069
2070 static void __iwl_down(struct iwl_priv *priv)
2071 {
2072 int exit_pending;
2073
2074 IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2075
2076 iwl_scan_cancel_timeout(priv, 200);
2077
2078 exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
2079
2080 /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
2081 * to prevent rearm timer */
2082 del_timer_sync(&priv->watchdog);
2083
2084 iwl_clear_ucode_stations(priv, NULL);
2085 iwl_dealloc_bcast_stations(priv);
2086 iwl_clear_driver_stations(priv);
2087
2088 /* reset BT coex data */
2089 priv->bt_status = 0;
2090 if (priv->cfg->bt_params)
2091 priv->bt_traffic_load =
2092 priv->cfg->bt_params->bt_init_traffic_load;
2093 else
2094 priv->bt_traffic_load = 0;
2095 priv->bt_full_concurrent = false;
2096 priv->bt_ci_compliance = 0;
2097
2098 /* Wipe out the EXIT_PENDING status bit if we are not actually
2099 * exiting the module */
2100 if (!exit_pending)
2101 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2102
2103 if (priv->mac80211_registered)
2104 ieee80211_stop_queues(priv->hw);
2105
2106 /* Clear out all status bits but a few that are stable across reset */
2107 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2108 STATUS_RF_KILL_HW |
2109 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2110 STATUS_GEO_CONFIGURED |
2111 test_bit(STATUS_FW_ERROR, &priv->status) <<
2112 STATUS_FW_ERROR |
2113 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2114 STATUS_EXIT_PENDING;
2115
2116 iwlagn_stop_device(priv);
2117
2118 dev_kfree_skb(priv->beacon_skb);
2119 priv->beacon_skb = NULL;
2120 }
2121
2122 static void iwl_down(struct iwl_priv *priv)
2123 {
2124 mutex_lock(&priv->mutex);
2125 __iwl_down(priv);
2126 mutex_unlock(&priv->mutex);
2127
2128 iwl_cancel_deferred_work(priv);
2129 }
2130
2131 #define HW_READY_TIMEOUT (50)
2132
2133 /* Note: returns poll_bit return value, which is >= 0 if success */
2134 static int iwl_set_hw_ready(struct iwl_priv *priv)
2135 {
2136 int ret;
2137
2138 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2139 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2140
2141 /* See if we got it */
2142 ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2143 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2144 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2145 HW_READY_TIMEOUT);
2146
2147 IWL_DEBUG_INFO(priv, "hardware%s ready\n", ret < 0 ? " not" : "");
2148 return ret;
2149 }
2150
2151 /* Note: returns standard 0/-ERROR code */
2152 int iwl_prepare_card_hw(struct iwl_priv *priv)
2153 {
2154 int ret;
2155
2156 IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter\n");
2157
2158 ret = iwl_set_hw_ready(priv);
2159 if (ret >= 0)
2160 return 0;
2161
2162 /* If HW is not ready, prepare the conditions to check again */
2163 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2164 CSR_HW_IF_CONFIG_REG_PREPARE);
2165
2166 ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2167 ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2168 CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2169
2170 if (ret < 0)
2171 return ret;
2172
2173 /* HW should be ready by now, check again. */
2174 ret = iwl_set_hw_ready(priv);
2175 if (ret >= 0)
2176 return 0;
2177 return ret;
2178 }
2179
2180 #define MAX_HW_RESTARTS 5
2181
2182 static int __iwl_up(struct iwl_priv *priv)
2183 {
2184 struct iwl_rxon_context *ctx;
2185 int ret;
2186
2187 lockdep_assert_held(&priv->mutex);
2188
2189 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2190 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2191 return -EIO;
2192 }
2193
2194 for_each_context(priv, ctx) {
2195 ret = iwlagn_alloc_bcast_station(priv, ctx);
2196 if (ret) {
2197 iwl_dealloc_bcast_stations(priv);
2198 return ret;
2199 }
2200 }
2201
2202 ret = iwlagn_run_init_ucode(priv);
2203 if (ret) {
2204 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
2205 goto error;
2206 }
2207
2208 ret = iwlagn_load_ucode_wait_alive(priv,
2209 &priv->ucode_rt,
2210 IWL_UCODE_REGULAR);
2211 if (ret) {
2212 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
2213 goto error;
2214 }
2215
2216 ret = iwl_alive_start(priv);
2217 if (ret)
2218 goto error;
2219 return 0;
2220
2221 error:
2222 set_bit(STATUS_EXIT_PENDING, &priv->status);
2223 __iwl_down(priv);
2224 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2225
2226 IWL_ERR(priv, "Unable to initialize device.\n");
2227 return ret;
2228 }
2229
2230
2231 /*****************************************************************************
2232 *
2233 * Workqueue callbacks
2234 *
2235 *****************************************************************************/
2236
2237 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2238 {
2239 struct iwl_priv *priv = container_of(work, struct iwl_priv,
2240 run_time_calib_work);
2241
2242 mutex_lock(&priv->mutex);
2243
2244 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2245 test_bit(STATUS_SCANNING, &priv->status)) {
2246 mutex_unlock(&priv->mutex);
2247 return;
2248 }
2249
2250 if (priv->start_calib) {
2251 iwl_chain_noise_calibration(priv);
2252 iwl_sensitivity_calibration(priv);
2253 }
2254
2255 mutex_unlock(&priv->mutex);
2256 }
2257
2258 static void iwlagn_prepare_restart(struct iwl_priv *priv)
2259 {
2260 struct iwl_rxon_context *ctx;
2261 bool bt_full_concurrent;
2262 u8 bt_ci_compliance;
2263 u8 bt_load;
2264 u8 bt_status;
2265
2266 lockdep_assert_held(&priv->mutex);
2267
2268 for_each_context(priv, ctx)
2269 ctx->vif = NULL;
2270 priv->is_open = 0;
2271
2272 /*
2273 * __iwl_down() will clear the BT status variables,
2274 * which is correct, but when we restart we really
2275 * want to keep them so restore them afterwards.
2276 *
2277 * The restart process will later pick them up and
2278 * re-configure the hw when we reconfigure the BT
2279 * command.
2280 */
2281 bt_full_concurrent = priv->bt_full_concurrent;
2282 bt_ci_compliance = priv->bt_ci_compliance;
2283 bt_load = priv->bt_traffic_load;
2284 bt_status = priv->bt_status;
2285
2286 __iwl_down(priv);
2287
2288 priv->bt_full_concurrent = bt_full_concurrent;
2289 priv->bt_ci_compliance = bt_ci_compliance;
2290 priv->bt_traffic_load = bt_load;
2291 priv->bt_status = bt_status;
2292 }
2293
2294 static void iwl_bg_restart(struct work_struct *data)
2295 {
2296 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2297
2298 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2299 return;
2300
2301 if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2302 mutex_lock(&priv->mutex);
2303 iwlagn_prepare_restart(priv);
2304 mutex_unlock(&priv->mutex);
2305 iwl_cancel_deferred_work(priv);
2306 ieee80211_restart_hw(priv->hw);
2307 } else {
2308 WARN_ON(1);
2309 }
2310 }
2311
2312 static void iwl_bg_rx_replenish(struct work_struct *data)
2313 {
2314 struct iwl_priv *priv =
2315 container_of(data, struct iwl_priv, rx_replenish);
2316
2317 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2318 return;
2319
2320 mutex_lock(&priv->mutex);
2321 iwlagn_rx_replenish(priv);
2322 mutex_unlock(&priv->mutex);
2323 }
2324
2325 static int iwl_mac_offchannel_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
2326 struct ieee80211_channel *chan,
2327 enum nl80211_channel_type channel_type,
2328 unsigned int wait)
2329 {
2330 struct iwl_priv *priv = hw->priv;
2331 int ret;
2332
2333 /* Not supported if we don't have PAN */
2334 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) {
2335 ret = -EOPNOTSUPP;
2336 goto free;
2337 }
2338
2339 /* Not supported on pre-P2P firmware */
2340 if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
2341 BIT(NL80211_IFTYPE_P2P_CLIENT))) {
2342 ret = -EOPNOTSUPP;
2343 goto free;
2344 }
2345
2346 mutex_lock(&priv->mutex);
2347
2348 if (!priv->contexts[IWL_RXON_CTX_PAN].is_active) {
2349 /*
2350 * If the PAN context is free, use the normal
2351 * way of doing remain-on-channel offload + TX.
2352 */
2353 ret = 1;
2354 goto out;
2355 }
2356
2357 /* TODO: queue up if scanning? */
2358 if (test_bit(STATUS_SCANNING, &priv->status) ||
2359 priv->_agn.offchan_tx_skb) {
2360 ret = -EBUSY;
2361 goto out;
2362 }
2363
2364 /*
2365 * max_scan_ie_len doesn't include the blank SSID or the header,
2366 * so need to add that again here.
2367 */
2368 if (skb->len > hw->wiphy->max_scan_ie_len + 24 + 2) {
2369 ret = -ENOBUFS;
2370 goto out;
2371 }
2372
2373 priv->_agn.offchan_tx_skb = skb;
2374 priv->_agn.offchan_tx_timeout = wait;
2375 priv->_agn.offchan_tx_chan = chan;
2376
2377 ret = iwl_scan_initiate(priv, priv->contexts[IWL_RXON_CTX_PAN].vif,
2378 IWL_SCAN_OFFCH_TX, chan->band);
2379 if (ret)
2380 priv->_agn.offchan_tx_skb = NULL;
2381 out:
2382 mutex_unlock(&priv->mutex);
2383 free:
2384 if (ret < 0)
2385 kfree_skb(skb);
2386
2387 return ret;
2388 }
2389
2390 static int iwl_mac_offchannel_tx_cancel_wait(struct ieee80211_hw *hw)
2391 {
2392 struct iwl_priv *priv = hw->priv;
2393 int ret;
2394
2395 mutex_lock(&priv->mutex);
2396
2397 if (!priv->_agn.offchan_tx_skb) {
2398 ret = -EINVAL;
2399 goto unlock;
2400 }
2401
2402 priv->_agn.offchan_tx_skb = NULL;
2403
2404 ret = iwl_scan_cancel_timeout(priv, 200);
2405 if (ret)
2406 ret = -EIO;
2407 unlock:
2408 mutex_unlock(&priv->mutex);
2409
2410 return ret;
2411 }
2412
2413 /*****************************************************************************
2414 *
2415 * mac80211 entry point functions
2416 *
2417 *****************************************************************************/
2418
2419 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
2420 {
2421 .max = 1,
2422 .types = BIT(NL80211_IFTYPE_STATION),
2423 },
2424 {
2425 .max = 1,
2426 .types = BIT(NL80211_IFTYPE_AP),
2427 },
2428 };
2429
2430 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
2431 {
2432 .max = 2,
2433 .types = BIT(NL80211_IFTYPE_STATION),
2434 },
2435 };
2436
2437 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
2438 {
2439 .max = 1,
2440 .types = BIT(NL80211_IFTYPE_STATION),
2441 },
2442 {
2443 .max = 1,
2444 .types = BIT(NL80211_IFTYPE_P2P_GO) |
2445 BIT(NL80211_IFTYPE_AP),
2446 },
2447 };
2448
2449 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
2450 {
2451 .max = 2,
2452 .types = BIT(NL80211_IFTYPE_STATION),
2453 },
2454 {
2455 .max = 1,
2456 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
2457 },
2458 };
2459
2460 static const struct ieee80211_iface_combination
2461 iwlagn_iface_combinations_dualmode[] = {
2462 { .num_different_channels = 1,
2463 .max_interfaces = 2,
2464 .beacon_int_infra_match = true,
2465 .limits = iwlagn_sta_ap_limits,
2466 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
2467 },
2468 { .num_different_channels = 1,
2469 .max_interfaces = 2,
2470 .limits = iwlagn_2sta_limits,
2471 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
2472 },
2473 };
2474
2475 static const struct ieee80211_iface_combination
2476 iwlagn_iface_combinations_p2p[] = {
2477 { .num_different_channels = 1,
2478 .max_interfaces = 2,
2479 .beacon_int_infra_match = true,
2480 .limits = iwlagn_p2p_sta_go_limits,
2481 .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
2482 },
2483 { .num_different_channels = 1,
2484 .max_interfaces = 2,
2485 .limits = iwlagn_p2p_2sta_limits,
2486 .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
2487 },
2488 };
2489
2490 /*
2491 * Not a mac80211 entry point function, but it fits in with all the
2492 * other mac80211 functions grouped here.
2493 */
2494 static int iwl_mac_setup_register(struct iwl_priv *priv,
2495 struct iwlagn_ucode_capabilities *capa)
2496 {
2497 int ret;
2498 struct ieee80211_hw *hw = priv->hw;
2499 struct iwl_rxon_context *ctx;
2500
2501 hw->rate_control_algorithm = "iwl-agn-rs";
2502
2503 /* Tell mac80211 our characteristics */
2504 hw->flags = IEEE80211_HW_SIGNAL_DBM |
2505 IEEE80211_HW_AMPDU_AGGREGATION |
2506 IEEE80211_HW_NEED_DTIM_PERIOD |
2507 IEEE80211_HW_SPECTRUM_MGMT |
2508 IEEE80211_HW_REPORTS_TX_ACK_STATUS;
2509
2510 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2511
2512 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2513 IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2514
2515 if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
2516 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
2517 IEEE80211_HW_SUPPORTS_STATIC_SMPS;
2518
2519 if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
2520 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
2521
2522 hw->sta_data_size = sizeof(struct iwl_station_priv);
2523 hw->vif_data_size = sizeof(struct iwl_vif_priv);
2524
2525 for_each_context(priv, ctx) {
2526 hw->wiphy->interface_modes |= ctx->interface_modes;
2527 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
2528 }
2529
2530 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
2531
2532 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
2533 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
2534 hw->wiphy->n_iface_combinations =
2535 ARRAY_SIZE(iwlagn_iface_combinations_p2p);
2536 } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
2537 hw->wiphy->iface_combinations = iwlagn_iface_combinations_dualmode;
2538 hw->wiphy->n_iface_combinations =
2539 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
2540 }
2541
2542 hw->wiphy->max_remain_on_channel_duration = 1000;
2543
2544 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
2545 WIPHY_FLAG_DISABLE_BEACON_HINTS |
2546 WIPHY_FLAG_IBSS_RSN;
2547
2548 /*
2549 * For now, disable PS by default because it affects
2550 * RX performance significantly.
2551 */
2552 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2553
2554 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
2555 /* we create the 802.11 header and a zero-length SSID element */
2556 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
2557
2558 /* Default value; 4 EDCA QOS priorities */
2559 hw->queues = 4;
2560
2561 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2562
2563 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2564 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2565 &priv->bands[IEEE80211_BAND_2GHZ];
2566 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2567 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2568 &priv->bands[IEEE80211_BAND_5GHZ];
2569
2570 iwl_leds_init(priv);
2571
2572 ret = ieee80211_register_hw(priv->hw);
2573 if (ret) {
2574 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2575 return ret;
2576 }
2577 priv->mac80211_registered = 1;
2578
2579 return 0;
2580 }
2581
2582
2583 static int iwlagn_mac_start(struct ieee80211_hw *hw)
2584 {
2585 struct iwl_priv *priv = hw->priv;
2586 int ret;
2587
2588 IWL_DEBUG_MAC80211(priv, "enter\n");
2589
2590 /* we should be verifying the device is ready to be opened */
2591 mutex_lock(&priv->mutex);
2592 ret = __iwl_up(priv);
2593 mutex_unlock(&priv->mutex);
2594 if (ret)
2595 return ret;
2596
2597 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2598
2599 /* Now we should be done, and the READY bit should be set. */
2600 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
2601 ret = -EIO;
2602
2603 iwlagn_led_enable(priv);
2604
2605 priv->is_open = 1;
2606 IWL_DEBUG_MAC80211(priv, "leave\n");
2607 return 0;
2608 }
2609
2610 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
2611 {
2612 struct iwl_priv *priv = hw->priv;
2613
2614 IWL_DEBUG_MAC80211(priv, "enter\n");
2615
2616 if (!priv->is_open)
2617 return;
2618
2619 priv->is_open = 0;
2620
2621 iwl_down(priv);
2622
2623 flush_workqueue(priv->workqueue);
2624
2625 /* User space software may expect getting rfkill changes
2626 * even if interface is down */
2627 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2628 iwl_enable_rfkill_int(priv);
2629
2630 IWL_DEBUG_MAC80211(priv, "leave\n");
2631 }
2632
2633 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2634 {
2635 struct iwl_priv *priv = hw->priv;
2636
2637 IWL_DEBUG_MACDUMP(priv, "enter\n");
2638
2639 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2640 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2641
2642 if (iwlagn_tx_skb(priv, skb))
2643 dev_kfree_skb_any(skb);
2644
2645 IWL_DEBUG_MACDUMP(priv, "leave\n");
2646 }
2647
2648 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
2649 struct ieee80211_vif *vif,
2650 struct ieee80211_key_conf *keyconf,
2651 struct ieee80211_sta *sta,
2652 u32 iv32, u16 *phase1key)
2653 {
2654 struct iwl_priv *priv = hw->priv;
2655 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2656
2657 IWL_DEBUG_MAC80211(priv, "enter\n");
2658
2659 iwl_update_tkip_key(priv, vif_priv->ctx, keyconf, sta,
2660 iv32, phase1key);
2661
2662 IWL_DEBUG_MAC80211(priv, "leave\n");
2663 }
2664
2665 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2666 struct ieee80211_vif *vif,
2667 struct ieee80211_sta *sta,
2668 struct ieee80211_key_conf *key)
2669 {
2670 struct iwl_priv *priv = hw->priv;
2671 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2672 struct iwl_rxon_context *ctx = vif_priv->ctx;
2673 int ret;
2674 u8 sta_id;
2675 bool is_default_wep_key = false;
2676
2677 IWL_DEBUG_MAC80211(priv, "enter\n");
2678
2679 if (iwlagn_mod_params.sw_crypto) {
2680 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2681 return -EOPNOTSUPP;
2682 }
2683
2684 /*
2685 * To support IBSS RSN, don't program group keys in IBSS, the
2686 * hardware will then not attempt to decrypt the frames.
2687 */
2688 if (vif->type == NL80211_IFTYPE_ADHOC &&
2689 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
2690 return -EOPNOTSUPP;
2691
2692 sta_id = iwl_sta_id_or_broadcast(priv, vif_priv->ctx, sta);
2693 if (sta_id == IWL_INVALID_STATION)
2694 return -EINVAL;
2695
2696 mutex_lock(&priv->mutex);
2697 iwl_scan_cancel_timeout(priv, 100);
2698
2699 /*
2700 * If we are getting WEP group key and we didn't receive any key mapping
2701 * so far, we are in legacy wep mode (group key only), otherwise we are
2702 * in 1X mode.
2703 * In legacy wep mode, we use another host command to the uCode.
2704 */
2705 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2706 key->cipher == WLAN_CIPHER_SUITE_WEP104) &&
2707 !sta) {
2708 if (cmd == SET_KEY)
2709 is_default_wep_key = !ctx->key_mapping_keys;
2710 else
2711 is_default_wep_key =
2712 (key->hw_key_idx == HW_KEY_DEFAULT);
2713 }
2714
2715 switch (cmd) {
2716 case SET_KEY:
2717 if (is_default_wep_key)
2718 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
2719 else
2720 ret = iwl_set_dynamic_key(priv, vif_priv->ctx,
2721 key, sta_id);
2722
2723 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2724 break;
2725 case DISABLE_KEY:
2726 if (is_default_wep_key)
2727 ret = iwl_remove_default_wep_key(priv, ctx, key);
2728 else
2729 ret = iwl_remove_dynamic_key(priv, ctx, key, sta_id);
2730
2731 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2732 break;
2733 default:
2734 ret = -EINVAL;
2735 }
2736
2737 mutex_unlock(&priv->mutex);
2738 IWL_DEBUG_MAC80211(priv, "leave\n");
2739
2740 return ret;
2741 }
2742
2743 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
2744 struct ieee80211_vif *vif,
2745 enum ieee80211_ampdu_mlme_action action,
2746 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
2747 u8 buf_size)
2748 {
2749 struct iwl_priv *priv = hw->priv;
2750 int ret = -EINVAL;
2751 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
2752
2753 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2754 sta->addr, tid);
2755
2756 if (!(priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE))
2757 return -EACCES;
2758
2759 mutex_lock(&priv->mutex);
2760
2761 switch (action) {
2762 case IEEE80211_AMPDU_RX_START:
2763 IWL_DEBUG_HT(priv, "start Rx\n");
2764 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
2765 break;
2766 case IEEE80211_AMPDU_RX_STOP:
2767 IWL_DEBUG_HT(priv, "stop Rx\n");
2768 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
2769 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2770 ret = 0;
2771 break;
2772 case IEEE80211_AMPDU_TX_START:
2773 IWL_DEBUG_HT(priv, "start Tx\n");
2774 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
2775 if (ret == 0) {
2776 priv->_agn.agg_tids_count++;
2777 IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2778 priv->_agn.agg_tids_count);
2779 }
2780 break;
2781 case IEEE80211_AMPDU_TX_STOP:
2782 IWL_DEBUG_HT(priv, "stop Tx\n");
2783 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
2784 if ((ret == 0) && (priv->_agn.agg_tids_count > 0)) {
2785 priv->_agn.agg_tids_count--;
2786 IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2787 priv->_agn.agg_tids_count);
2788 }
2789 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2790 ret = 0;
2791 if (priv->cfg->ht_params &&
2792 priv->cfg->ht_params->use_rts_for_aggregation) {
2793 /*
2794 * switch off RTS/CTS if it was previously enabled
2795 */
2796 sta_priv->lq_sta.lq.general_params.flags &=
2797 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2798 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2799 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2800 }
2801 break;
2802 case IEEE80211_AMPDU_TX_OPERATIONAL:
2803 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2804
2805 iwlagn_txq_agg_queue_setup(priv, sta, tid, buf_size);
2806
2807 /*
2808 * If the limit is 0, then it wasn't initialised yet,
2809 * use the default. We can do that since we take the
2810 * minimum below, and we don't want to go above our
2811 * default due to hardware restrictions.
2812 */
2813 if (sta_priv->max_agg_bufsize == 0)
2814 sta_priv->max_agg_bufsize =
2815 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2816
2817 /*
2818 * Even though in theory the peer could have different
2819 * aggregation reorder buffer sizes for different sessions,
2820 * our ucode doesn't allow for that and has a global limit
2821 * for each station. Therefore, use the minimum of all the
2822 * aggregation sessions and our default value.
2823 */
2824 sta_priv->max_agg_bufsize =
2825 min(sta_priv->max_agg_bufsize, buf_size);
2826
2827 if (priv->cfg->ht_params &&
2828 priv->cfg->ht_params->use_rts_for_aggregation) {
2829 /*
2830 * switch to RTS/CTS if it is the prefer protection
2831 * method for HT traffic
2832 */
2833
2834 sta_priv->lq_sta.lq.general_params.flags |=
2835 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2836 }
2837
2838 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
2839 sta_priv->max_agg_bufsize;
2840
2841 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2842 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2843
2844 IWL_INFO(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
2845 sta->addr, tid);
2846 ret = 0;
2847 break;
2848 }
2849 mutex_unlock(&priv->mutex);
2850
2851 return ret;
2852 }
2853
2854 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
2855 struct ieee80211_vif *vif,
2856 struct ieee80211_sta *sta)
2857 {
2858 struct iwl_priv *priv = hw->priv;
2859 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2860 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2861 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
2862 int ret;
2863 u8 sta_id;
2864
2865 IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
2866 sta->addr);
2867 mutex_lock(&priv->mutex);
2868 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
2869 sta->addr);
2870 sta_priv->common.sta_id = IWL_INVALID_STATION;
2871
2872 atomic_set(&sta_priv->pending_frames, 0);
2873 if (vif->type == NL80211_IFTYPE_AP)
2874 sta_priv->client = true;
2875
2876 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
2877 is_ap, sta, &sta_id);
2878 if (ret) {
2879 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
2880 sta->addr, ret);
2881 /* Should we return success if return code is EEXIST ? */
2882 mutex_unlock(&priv->mutex);
2883 return ret;
2884 }
2885
2886 sta_priv->common.sta_id = sta_id;
2887
2888 /* Initialize rate scaling */
2889 IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
2890 sta->addr);
2891 iwl_rs_rate_init(priv, sta, sta_id);
2892 mutex_unlock(&priv->mutex);
2893
2894 return 0;
2895 }
2896
2897 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
2898 struct ieee80211_channel_switch *ch_switch)
2899 {
2900 struct iwl_priv *priv = hw->priv;
2901 const struct iwl_channel_info *ch_info;
2902 struct ieee80211_conf *conf = &hw->conf;
2903 struct ieee80211_channel *channel = ch_switch->channel;
2904 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2905 /*
2906 * MULTI-FIXME
2907 * When we add support for multiple interfaces, we need to
2908 * revisit this. The channel switch command in the device
2909 * only affects the BSS context, but what does that really
2910 * mean? And what if we get a CSA on the second interface?
2911 * This needs a lot of work.
2912 */
2913 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2914 u16 ch;
2915
2916 IWL_DEBUG_MAC80211(priv, "enter\n");
2917
2918 mutex_lock(&priv->mutex);
2919
2920 if (iwl_is_rfkill(priv))
2921 goto out;
2922
2923 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2924 test_bit(STATUS_SCANNING, &priv->status) ||
2925 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
2926 goto out;
2927
2928 if (!iwl_is_associated_ctx(ctx))
2929 goto out;
2930
2931 if (!priv->cfg->ops->lib->set_channel_switch)
2932 goto out;
2933
2934 ch = channel->hw_value;
2935 if (le16_to_cpu(ctx->active.channel) == ch)
2936 goto out;
2937
2938 ch_info = iwl_get_channel_info(priv, channel->band, ch);
2939 if (!is_channel_valid(ch_info)) {
2940 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
2941 goto out;
2942 }
2943
2944 spin_lock_irq(&priv->lock);
2945
2946 priv->current_ht_config.smps = conf->smps_mode;
2947
2948 /* Configure HT40 channels */
2949 ctx->ht.enabled = conf_is_ht(conf);
2950 if (ctx->ht.enabled) {
2951 if (conf_is_ht40_minus(conf)) {
2952 ctx->ht.extension_chan_offset =
2953 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2954 ctx->ht.is_40mhz = true;
2955 } else if (conf_is_ht40_plus(conf)) {
2956 ctx->ht.extension_chan_offset =
2957 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2958 ctx->ht.is_40mhz = true;
2959 } else {
2960 ctx->ht.extension_chan_offset =
2961 IEEE80211_HT_PARAM_CHA_SEC_NONE;
2962 ctx->ht.is_40mhz = false;
2963 }
2964 } else
2965 ctx->ht.is_40mhz = false;
2966
2967 if ((le16_to_cpu(ctx->staging.channel) != ch))
2968 ctx->staging.flags = 0;
2969
2970 iwl_set_rxon_channel(priv, channel, ctx);
2971 iwl_set_rxon_ht(priv, ht_conf);
2972 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
2973
2974 spin_unlock_irq(&priv->lock);
2975
2976 iwl_set_rate(priv);
2977 /*
2978 * at this point, staging_rxon has the
2979 * configuration for channel switch
2980 */
2981 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
2982 priv->switch_channel = cpu_to_le16(ch);
2983 if (priv->cfg->ops->lib->set_channel_switch(priv, ch_switch)) {
2984 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
2985 priv->switch_channel = 0;
2986 ieee80211_chswitch_done(ctx->vif, false);
2987 }
2988
2989 out:
2990 mutex_unlock(&priv->mutex);
2991 IWL_DEBUG_MAC80211(priv, "leave\n");
2992 }
2993
2994 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
2995 unsigned int changed_flags,
2996 unsigned int *total_flags,
2997 u64 multicast)
2998 {
2999 struct iwl_priv *priv = hw->priv;
3000 __le32 filter_or = 0, filter_nand = 0;
3001 struct iwl_rxon_context *ctx;
3002
3003 #define CHK(test, flag) do { \
3004 if (*total_flags & (test)) \
3005 filter_or |= (flag); \
3006 else \
3007 filter_nand |= (flag); \
3008 } while (0)
3009
3010 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
3011 changed_flags, *total_flags);
3012
3013 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
3014 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
3015 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
3016 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3017
3018 #undef CHK
3019
3020 mutex_lock(&priv->mutex);
3021
3022 for_each_context(priv, ctx) {
3023 ctx->staging.filter_flags &= ~filter_nand;
3024 ctx->staging.filter_flags |= filter_or;
3025
3026 /*
3027 * Not committing directly because hardware can perform a scan,
3028 * but we'll eventually commit the filter flags change anyway.
3029 */
3030 }
3031
3032 mutex_unlock(&priv->mutex);
3033
3034 /*
3035 * Receiving all multicast frames is always enabled by the
3036 * default flags setup in iwl_connection_init_rx_config()
3037 * since we currently do not support programming multicast
3038 * filters into the device.
3039 */
3040 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
3041 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3042 }
3043
3044 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
3045 {
3046 struct iwl_priv *priv = hw->priv;
3047
3048 mutex_lock(&priv->mutex);
3049 IWL_DEBUG_MAC80211(priv, "enter\n");
3050
3051 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3052 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
3053 goto done;
3054 }
3055 if (iwl_is_rfkill(priv)) {
3056 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
3057 goto done;
3058 }
3059
3060 /*
3061 * mac80211 will not push any more frames for transmit
3062 * until the flush is completed
3063 */
3064 if (drop) {
3065 IWL_DEBUG_MAC80211(priv, "send flush command\n");
3066 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
3067 IWL_ERR(priv, "flush request fail\n");
3068 goto done;
3069 }
3070 }
3071 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
3072 iwlagn_wait_tx_queue_empty(priv);
3073 done:
3074 mutex_unlock(&priv->mutex);
3075 IWL_DEBUG_MAC80211(priv, "leave\n");
3076 }
3077
3078 static void iwlagn_disable_roc(struct iwl_priv *priv)
3079 {
3080 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
3081 struct ieee80211_channel *chan = ACCESS_ONCE(priv->hw->conf.channel);
3082
3083 lockdep_assert_held(&priv->mutex);
3084
3085 if (!ctx->is_active)
3086 return;
3087
3088 ctx->staging.dev_type = RXON_DEV_TYPE_2STA;
3089 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3090 iwl_set_rxon_channel(priv, chan, ctx);
3091 iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
3092
3093 priv->_agn.hw_roc_channel = NULL;
3094
3095 iwlagn_commit_rxon(priv, ctx);
3096
3097 ctx->is_active = false;
3098 }
3099
3100 static void iwlagn_bg_roc_done(struct work_struct *work)
3101 {
3102 struct iwl_priv *priv = container_of(work, struct iwl_priv,
3103 _agn.hw_roc_work.work);
3104
3105 mutex_lock(&priv->mutex);
3106 ieee80211_remain_on_channel_expired(priv->hw);
3107 iwlagn_disable_roc(priv);
3108 mutex_unlock(&priv->mutex);
3109 }
3110
3111 static int iwl_mac_remain_on_channel(struct ieee80211_hw *hw,
3112 struct ieee80211_channel *channel,
3113 enum nl80211_channel_type channel_type,
3114 int duration)
3115 {
3116 struct iwl_priv *priv = hw->priv;
3117 int err = 0;
3118
3119 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
3120 return -EOPNOTSUPP;
3121
3122 if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
3123 BIT(NL80211_IFTYPE_P2P_CLIENT)))
3124 return -EOPNOTSUPP;
3125
3126 mutex_lock(&priv->mutex);
3127
3128 if (priv->contexts[IWL_RXON_CTX_PAN].is_active ||
3129 test_bit(STATUS_SCAN_HW, &priv->status)) {
3130 err = -EBUSY;
3131 goto out;
3132 }
3133
3134 priv->contexts[IWL_RXON_CTX_PAN].is_active = true;
3135 priv->_agn.hw_roc_channel = channel;
3136 priv->_agn.hw_roc_chantype = channel_type;
3137 priv->_agn.hw_roc_duration = DIV_ROUND_UP(duration * 1000, 1024);
3138 iwlagn_commit_rxon(priv, &priv->contexts[IWL_RXON_CTX_PAN]);
3139 queue_delayed_work(priv->workqueue, &priv->_agn.hw_roc_work,
3140 msecs_to_jiffies(duration + 20));
3141
3142 msleep(IWL_MIN_SLOT_TIME); /* TU is almost ms */
3143 ieee80211_ready_on_channel(priv->hw);
3144
3145 out:
3146 mutex_unlock(&priv->mutex);
3147
3148 return err;
3149 }
3150
3151 static int iwl_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
3152 {
3153 struct iwl_priv *priv = hw->priv;
3154
3155 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
3156 return -EOPNOTSUPP;
3157
3158 cancel_delayed_work_sync(&priv->_agn.hw_roc_work);
3159
3160 mutex_lock(&priv->mutex);
3161 iwlagn_disable_roc(priv);
3162 mutex_unlock(&priv->mutex);
3163
3164 return 0;
3165 }
3166
3167 /*****************************************************************************
3168 *
3169 * driver setup and teardown
3170 *
3171 *****************************************************************************/
3172
3173 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3174 {
3175 priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3176
3177 init_waitqueue_head(&priv->wait_command_queue);
3178
3179 INIT_WORK(&priv->restart, iwl_bg_restart);
3180 INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3181 INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3182 INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3183 INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
3184 INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
3185 INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
3186 INIT_DELAYED_WORK(&priv->_agn.hw_roc_work, iwlagn_bg_roc_done);
3187
3188 iwl_setup_scan_deferred_work(priv);
3189
3190 if (priv->cfg->ops->lib->setup_deferred_work)
3191 priv->cfg->ops->lib->setup_deferred_work(priv);
3192
3193 init_timer(&priv->statistics_periodic);
3194 priv->statistics_periodic.data = (unsigned long)priv;
3195 priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3196
3197 init_timer(&priv->ucode_trace);
3198 priv->ucode_trace.data = (unsigned long)priv;
3199 priv->ucode_trace.function = iwl_bg_ucode_trace;
3200
3201 init_timer(&priv->watchdog);
3202 priv->watchdog.data = (unsigned long)priv;
3203 priv->watchdog.function = iwl_bg_watchdog;
3204
3205 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3206 iwl_irq_tasklet, (unsigned long)priv);
3207 }
3208
3209 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3210 {
3211 if (priv->cfg->ops->lib->cancel_deferred_work)
3212 priv->cfg->ops->lib->cancel_deferred_work(priv);
3213
3214 cancel_work_sync(&priv->run_time_calib_work);
3215 cancel_work_sync(&priv->beacon_update);
3216
3217 iwl_cancel_scan_deferred_work(priv);
3218
3219 cancel_work_sync(&priv->bt_full_concurrency);
3220 cancel_work_sync(&priv->bt_runtime_config);
3221
3222 del_timer_sync(&priv->statistics_periodic);
3223 del_timer_sync(&priv->ucode_trace);
3224 }
3225
3226 static void iwl_init_hw_rates(struct iwl_priv *priv,
3227 struct ieee80211_rate *rates)
3228 {
3229 int i;
3230
3231 for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
3232 rates[i].bitrate = iwl_rates[i].ieee * 5;
3233 rates[i].hw_value = i; /* Rate scaling will work on indexes */
3234 rates[i].hw_value_short = i;
3235 rates[i].flags = 0;
3236 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
3237 /*
3238 * If CCK != 1M then set short preamble rate flag.
3239 */
3240 rates[i].flags |=
3241 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
3242 0 : IEEE80211_RATE_SHORT_PREAMBLE;
3243 }
3244 }
3245 }
3246
3247 static int iwl_init_drv(struct iwl_priv *priv)
3248 {
3249 int ret;
3250
3251 spin_lock_init(&priv->sta_lock);
3252 spin_lock_init(&priv->hcmd_lock);
3253
3254 mutex_init(&priv->mutex);
3255
3256 priv->ieee_channels = NULL;
3257 priv->ieee_rates = NULL;
3258 priv->band = IEEE80211_BAND_2GHZ;
3259
3260 priv->iw_mode = NL80211_IFTYPE_STATION;
3261 priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
3262 priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3263 priv->_agn.agg_tids_count = 0;
3264
3265 /* initialize force reset */
3266 priv->force_reset[IWL_RF_RESET].reset_duration =
3267 IWL_DELAY_NEXT_FORCE_RF_RESET;
3268 priv->force_reset[IWL_FW_RESET].reset_duration =
3269 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
3270
3271 priv->rx_statistics_jiffies = jiffies;
3272
3273 /* Choose which receivers/antennas to use */
3274 if (priv->cfg->ops->hcmd->set_rxon_chain)
3275 priv->cfg->ops->hcmd->set_rxon_chain(priv,
3276 &priv->contexts[IWL_RXON_CTX_BSS]);
3277
3278 iwl_init_scan_params(priv);
3279
3280 /* init bt coex */
3281 if (priv->cfg->bt_params &&
3282 priv->cfg->bt_params->advanced_bt_coexist) {
3283 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
3284 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
3285 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
3286 priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
3287 priv->bt_duration = BT_DURATION_LIMIT_DEF;
3288 priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
3289 }
3290
3291 ret = iwl_init_channel_map(priv);
3292 if (ret) {
3293 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3294 goto err;
3295 }
3296
3297 ret = iwlcore_init_geos(priv);
3298 if (ret) {
3299 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3300 goto err_free_channel_map;
3301 }
3302 iwl_init_hw_rates(priv, priv->ieee_rates);
3303
3304 return 0;
3305
3306 err_free_channel_map:
3307 iwl_free_channel_map(priv);
3308 err:
3309 return ret;
3310 }
3311
3312 static void iwl_uninit_drv(struct iwl_priv *priv)
3313 {
3314 iwl_calib_free_results(priv);
3315 iwlcore_free_geos(priv);
3316 iwl_free_channel_map(priv);
3317 kfree(priv->scan_cmd);
3318 kfree(priv->beacon_cmd);
3319 }
3320
3321 struct ieee80211_ops iwlagn_hw_ops = {
3322 .tx = iwlagn_mac_tx,
3323 .start = iwlagn_mac_start,
3324 .stop = iwlagn_mac_stop,
3325 .add_interface = iwl_mac_add_interface,
3326 .remove_interface = iwl_mac_remove_interface,
3327 .change_interface = iwl_mac_change_interface,
3328 .config = iwlagn_mac_config,
3329 .configure_filter = iwlagn_configure_filter,
3330 .set_key = iwlagn_mac_set_key,
3331 .update_tkip_key = iwlagn_mac_update_tkip_key,
3332 .conf_tx = iwl_mac_conf_tx,
3333 .bss_info_changed = iwlagn_bss_info_changed,
3334 .ampdu_action = iwlagn_mac_ampdu_action,
3335 .hw_scan = iwl_mac_hw_scan,
3336 .sta_notify = iwlagn_mac_sta_notify,
3337 .sta_add = iwlagn_mac_sta_add,
3338 .sta_remove = iwl_mac_sta_remove,
3339 .channel_switch = iwlagn_mac_channel_switch,
3340 .flush = iwlagn_mac_flush,
3341 .tx_last_beacon = iwl_mac_tx_last_beacon,
3342 .remain_on_channel = iwl_mac_remain_on_channel,
3343 .cancel_remain_on_channel = iwl_mac_cancel_remain_on_channel,
3344 .offchannel_tx = iwl_mac_offchannel_tx,
3345 .offchannel_tx_cancel_wait = iwl_mac_offchannel_tx_cancel_wait,
3346 CFG80211_TESTMODE_CMD(iwl_testmode_cmd)
3347 CFG80211_TESTMODE_DUMP(iwl_testmode_dump)
3348 };
3349
3350 static u32 iwl_hw_detect(struct iwl_priv *priv)
3351 {
3352 return iwl_read32(priv, CSR_HW_REV);
3353 }
3354
3355 static int iwl_set_hw_params(struct iwl_priv *priv)
3356 {
3357 priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
3358 priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
3359 if (iwlagn_mod_params.amsdu_size_8K)
3360 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
3361 else
3362 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
3363
3364 priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
3365
3366 if (iwlagn_mod_params.disable_11n)
3367 priv->cfg->sku &= ~EEPROM_SKU_CAP_11N_ENABLE;
3368
3369 /* Device-specific setup */
3370 return priv->cfg->ops->lib->set_hw_params(priv);
3371 }
3372
3373 static const u8 iwlagn_bss_ac_to_fifo[] = {
3374 IWL_TX_FIFO_VO,
3375 IWL_TX_FIFO_VI,
3376 IWL_TX_FIFO_BE,
3377 IWL_TX_FIFO_BK,
3378 };
3379
3380 static const u8 iwlagn_bss_ac_to_queue[] = {
3381 0, 1, 2, 3,
3382 };
3383
3384 static const u8 iwlagn_pan_ac_to_fifo[] = {
3385 IWL_TX_FIFO_VO_IPAN,
3386 IWL_TX_FIFO_VI_IPAN,
3387 IWL_TX_FIFO_BE_IPAN,
3388 IWL_TX_FIFO_BK_IPAN,
3389 };
3390
3391 static const u8 iwlagn_pan_ac_to_queue[] = {
3392 7, 6, 5, 4,
3393 };
3394
3395 /* This function both allocates and initializes hw and priv. */
3396 static struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg)
3397 {
3398 struct iwl_priv *priv;
3399 /* mac80211 allocates memory for this device instance, including
3400 * space for this driver's private structure */
3401 struct ieee80211_hw *hw;
3402
3403 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwlagn_hw_ops);
3404 if (hw == NULL) {
3405 pr_err("%s: Can not allocate network device\n",
3406 cfg->name);
3407 goto out;
3408 }
3409
3410 priv = hw->priv;
3411 priv->hw = hw;
3412
3413 out:
3414 return hw;
3415 }
3416
3417 static void iwl_init_context(struct iwl_priv *priv)
3418 {
3419 int i;
3420
3421 /*
3422 * The default context is always valid,
3423 * more may be discovered when firmware
3424 * is loaded.
3425 */
3426 priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
3427
3428 for (i = 0; i < NUM_IWL_RXON_CTX; i++)
3429 priv->contexts[i].ctxid = i;
3430
3431 priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
3432 priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
3433 priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
3434 priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
3435 priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
3436 priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
3437 priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
3438 priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
3439 priv->contexts[IWL_RXON_CTX_BSS].ac_to_fifo = iwlagn_bss_ac_to_fifo;
3440 priv->contexts[IWL_RXON_CTX_BSS].ac_to_queue = iwlagn_bss_ac_to_queue;
3441 priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
3442 BIT(NL80211_IFTYPE_ADHOC);
3443 priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
3444 BIT(NL80211_IFTYPE_STATION);
3445 priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
3446 priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
3447 priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
3448 priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
3449
3450 priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
3451 priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
3452 REPLY_WIPAN_RXON_TIMING;
3453 priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
3454 REPLY_WIPAN_RXON_ASSOC;
3455 priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
3456 priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
3457 priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
3458 priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
3459 priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
3460 priv->contexts[IWL_RXON_CTX_PAN].ac_to_fifo = iwlagn_pan_ac_to_fifo;
3461 priv->contexts[IWL_RXON_CTX_PAN].ac_to_queue = iwlagn_pan_ac_to_queue;
3462 priv->contexts[IWL_RXON_CTX_PAN].mcast_queue = IWL_IPAN_MCAST_QUEUE;
3463 priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
3464 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
3465 #ifdef CONFIG_IWL_P2P
3466 priv->contexts[IWL_RXON_CTX_PAN].interface_modes |=
3467 BIT(NL80211_IFTYPE_P2P_CLIENT) | BIT(NL80211_IFTYPE_P2P_GO);
3468 #endif
3469 priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
3470 priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
3471 priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
3472
3473 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
3474 }
3475
3476 int iwl_probe(void *bus_specific, struct iwl_bus_ops *bus_ops,
3477 struct iwl_cfg *cfg)
3478 {
3479 int err = 0;
3480 struct iwl_priv *priv;
3481 struct ieee80211_hw *hw;
3482 u16 num_mac;
3483 u32 hw_rev;
3484
3485 /************************
3486 * 1. Allocating HW data
3487 ************************/
3488 hw = iwl_alloc_all(cfg);
3489 if (!hw) {
3490 err = -ENOMEM;
3491 goto out; }
3492 priv = hw->priv;
3493
3494 priv->bus.priv = priv;
3495 priv->bus.bus_specific = bus_specific;
3496 priv->bus.ops = bus_ops;
3497 priv->bus.ops->set_drv_data(&priv->bus, priv);
3498 priv->bus.dev = priv->bus.ops->get_dev(&priv->bus);
3499
3500 /* At this point both hw and priv are allocated. */
3501
3502 SET_IEEE80211_DEV(hw, priv->bus.dev);
3503
3504 IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3505 priv->cfg = cfg;
3506 priv->inta_mask = CSR_INI_SET_MASK;
3507
3508 /* is antenna coupling more than 35dB ? */
3509 priv->bt_ant_couple_ok =
3510 (iwlagn_ant_coupling > IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
3511 true : false;
3512
3513 /* enable/disable bt channel inhibition */
3514 priv->bt_ch_announce = iwlagn_bt_ch_announce;
3515 IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
3516 (priv->bt_ch_announce) ? "On" : "Off");
3517
3518 if (iwl_alloc_traffic_mem(priv))
3519 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3520
3521
3522 /* these spin locks will be used in apm_ops.init and EEPROM access
3523 * we should init now
3524 */
3525 spin_lock_init(&priv->reg_lock);
3526 spin_lock_init(&priv->lock);
3527
3528 /*
3529 * stop and reset the on-board processor just in case it is in a
3530 * strange state ... like being left stranded by a primary kernel
3531 * and this is now the kdump kernel trying to start up
3532 */
3533 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3534
3535 /***********************
3536 * 3. Read REV register
3537 ***********************/
3538 hw_rev = iwl_hw_detect(priv);
3539 IWL_INFO(priv, "Detected %s, REV=0x%X\n",
3540 priv->cfg->name, hw_rev);
3541
3542 if (iwl_prepare_card_hw(priv)) {
3543 err = -EIO;
3544 IWL_WARN(priv, "Failed, HW not ready\n");
3545 goto out_free_traffic_mem;
3546 }
3547
3548 /*****************
3549 * 4. Read EEPROM
3550 *****************/
3551 /* Read the EEPROM */
3552 err = iwl_eeprom_init(priv, hw_rev);
3553 if (err) {
3554 IWL_ERR(priv, "Unable to init EEPROM\n");
3555 goto out_free_traffic_mem;
3556 }
3557 err = iwl_eeprom_check_version(priv);
3558 if (err)
3559 goto out_free_eeprom;
3560
3561 err = iwl_eeprom_check_sku(priv);
3562 if (err)
3563 goto out_free_eeprom;
3564
3565 /* extract MAC Address */
3566 iwl_eeprom_get_mac(priv, priv->addresses[0].addr);
3567 IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
3568 priv->hw->wiphy->addresses = priv->addresses;
3569 priv->hw->wiphy->n_addresses = 1;
3570 num_mac = iwl_eeprom_query16(priv, EEPROM_NUM_MAC_ADDRESS);
3571 if (num_mac > 1) {
3572 memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
3573 ETH_ALEN);
3574 priv->addresses[1].addr[5]++;
3575 priv->hw->wiphy->n_addresses++;
3576 }
3577
3578 /* initialize all valid contexts */
3579 iwl_init_context(priv);
3580
3581 /************************
3582 * 5. Setup HW constants
3583 ************************/
3584 if (iwl_set_hw_params(priv)) {
3585 err = -ENOENT;
3586 IWL_ERR(priv, "failed to set hw parameters\n");
3587 goto out_free_eeprom;
3588 }
3589
3590 /*******************
3591 * 6. Setup priv
3592 *******************/
3593
3594 err = iwl_init_drv(priv);
3595 if (err)
3596 goto out_free_eeprom;
3597 /* At this point both hw and priv are initialized. */
3598
3599 /********************
3600 * 7. Setup services
3601 ********************/
3602 iwl_alloc_isr_ict(priv);
3603
3604 err = request_irq(priv->bus.ops->get_irq(&priv->bus), iwl_isr_ict,
3605 IRQF_SHARED, DRV_NAME, priv);
3606 if (err) {
3607 IWL_ERR(priv, "Error allocating IRQ %d\n",
3608 priv->bus.ops->get_irq(&priv->bus));
3609 goto out_uninit_drv;
3610 }
3611
3612 iwl_setup_deferred_work(priv);
3613 iwl_setup_rx_handlers(priv);
3614 iwl_testmode_init(priv);
3615
3616 /*********************************************
3617 * 8. Enable interrupts
3618 *********************************************/
3619
3620 iwl_enable_rfkill_int(priv);
3621
3622 /* If platform's RF_KILL switch is NOT set to KILL */
3623 if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3624 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3625 else
3626 set_bit(STATUS_RF_KILL_HW, &priv->status);
3627
3628 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3629 test_bit(STATUS_RF_KILL_HW, &priv->status));
3630
3631 iwl_power_initialize(priv);
3632 iwl_tt_initialize(priv);
3633
3634 init_completion(&priv->_agn.firmware_loading_complete);
3635
3636 err = iwl_request_firmware(priv, true);
3637 if (err)
3638 goto out_destroy_workqueue;
3639
3640 return 0;
3641
3642 out_destroy_workqueue:
3643 destroy_workqueue(priv->workqueue);
3644 priv->workqueue = NULL;
3645 free_irq(priv->bus.ops->get_irq(&priv->bus), priv);
3646 iwl_free_isr_ict(priv);
3647 out_uninit_drv:
3648 iwl_uninit_drv(priv);
3649 out_free_eeprom:
3650 iwl_eeprom_free(priv);
3651 out_free_traffic_mem:
3652 iwl_free_traffic_mem(priv);
3653 ieee80211_free_hw(priv->hw);
3654 out:
3655 return err;
3656 }
3657
3658 void __devexit iwl_remove(struct iwl_priv * priv)
3659 {
3660 unsigned long flags;
3661
3662 wait_for_completion(&priv->_agn.firmware_loading_complete);
3663
3664 IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3665
3666 iwl_dbgfs_unregister(priv);
3667 sysfs_remove_group(&priv->bus.dev->kobj,
3668 &iwl_attribute_group);
3669
3670 /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3671 * to be called and iwl_down since we are removing the device
3672 * we need to set STATUS_EXIT_PENDING bit.
3673 */
3674 set_bit(STATUS_EXIT_PENDING, &priv->status);
3675
3676 iwl_testmode_cleanup(priv);
3677 iwl_leds_exit(priv);
3678
3679 if (priv->mac80211_registered) {
3680 ieee80211_unregister_hw(priv->hw);
3681 priv->mac80211_registered = 0;
3682 }
3683
3684 /* Reset to low power before unloading driver. */
3685 iwl_apm_stop(priv);
3686
3687 iwl_tt_exit(priv);
3688
3689 /* make sure we flush any pending irq or
3690 * tasklet for the driver
3691 */
3692 spin_lock_irqsave(&priv->lock, flags);
3693 iwl_disable_interrupts(priv);
3694 spin_unlock_irqrestore(&priv->lock, flags);
3695
3696 iwl_synchronize_irq(priv);
3697
3698 iwl_dealloc_ucode(priv);
3699
3700 if (priv->rxq.bd)
3701 iwlagn_rx_queue_free(priv, &priv->rxq);
3702 iwlagn_hw_txq_ctx_free(priv);
3703
3704 iwl_eeprom_free(priv);
3705
3706
3707 /*netif_stop_queue(dev); */
3708 flush_workqueue(priv->workqueue);
3709
3710 /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3711 * priv->workqueue... so we can't take down the workqueue
3712 * until now... */
3713 destroy_workqueue(priv->workqueue);
3714 priv->workqueue = NULL;
3715 iwl_free_traffic_mem(priv);
3716
3717 free_irq(priv->bus.ops->get_irq(&priv->bus), priv);
3718 priv->bus.ops->set_drv_data(&priv->bus, NULL);
3719
3720 iwl_uninit_drv(priv);
3721
3722 iwl_free_isr_ict(priv);
3723
3724 dev_kfree_skb(priv->beacon_skb);
3725
3726 ieee80211_free_hw(priv->hw);
3727 }
3728
3729
3730 /*****************************************************************************
3731 *
3732 * driver and module entry point
3733 *
3734 *****************************************************************************/
3735 static int __init iwl_init(void)
3736 {
3737
3738 int ret;
3739 pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3740 pr_info(DRV_COPYRIGHT "\n");
3741
3742 ret = iwlagn_rate_control_register();
3743 if (ret) {
3744 pr_err("Unable to register rate control algorithm: %d\n", ret);
3745 return ret;
3746 }
3747
3748 ret = iwl_pci_register_driver();
3749
3750 if (ret)
3751 goto error_register;
3752 return ret;
3753
3754 error_register:
3755 iwlagn_rate_control_unregister();
3756 return ret;
3757 }
3758
3759 static void __exit iwl_exit(void)
3760 {
3761 iwl_pci_unregister_driver();
3762 iwlagn_rate_control_unregister();
3763 }
3764
3765 module_exit(iwl_exit);
3766 module_init(iwl_init);
3767
3768 #ifdef CONFIG_IWLWIFI_DEBUG
3769 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3770 MODULE_PARM_DESC(debug, "debug output mask");
3771 #endif
3772
3773 module_param_named(swcrypto, iwlagn_mod_params.sw_crypto, int, S_IRUGO);
3774 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
3775 module_param_named(queues_num, iwlagn_mod_params.num_of_queues, int, S_IRUGO);
3776 MODULE_PARM_DESC(queues_num, "number of hw queues.");
3777 module_param_named(11n_disable, iwlagn_mod_params.disable_11n, int, S_IRUGO);
3778 MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
3779 module_param_named(amsdu_size_8K, iwlagn_mod_params.amsdu_size_8K,
3780 int, S_IRUGO);
3781 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
3782 module_param_named(fw_restart, iwlagn_mod_params.restart_fw, int, S_IRUGO);
3783 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
3784
3785 module_param_named(ucode_alternative, iwlagn_wanted_ucode_alternative, int,
3786 S_IRUGO);
3787 MODULE_PARM_DESC(ucode_alternative,
3788 "specify ucode alternative to use from ucode file");
3789
3790 module_param_named(antenna_coupling, iwlagn_ant_coupling, int, S_IRUGO);
3791 MODULE_PARM_DESC(antenna_coupling,
3792 "specify antenna coupling in dB (defualt: 0 dB)");
3793
3794 module_param_named(bt_ch_inhibition, iwlagn_bt_ch_announce, bool, S_IRUGO);
3795 MODULE_PARM_DESC(bt_ch_inhibition,
3796 "Disable BT channel inhibition (default: enable)");
3797
3798 module_param_named(plcp_check, iwlagn_mod_params.plcp_check, bool, S_IRUGO);
3799 MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");
3800
3801 module_param_named(ack_check, iwlagn_mod_params.ack_check, bool, S_IRUGO);
3802 MODULE_PARM_DESC(ack_check, "Check ack health (default: 0 [disabled])");
3803
3804 /*
3805 * set bt_coex_active to true, uCode will do kill/defer
3806 * every time the priority line is asserted (BT is sending signals on the
3807 * priority line in the PCIx).
3808 * set bt_coex_active to false, uCode will ignore the BT activity and
3809 * perform the normal operation
3810 *
3811 * User might experience transmit issue on some platform due to WiFi/BT
3812 * co-exist problem. The possible behaviors are:
3813 * Able to scan and finding all the available AP
3814 * Not able to associate with any AP
3815 * On those platforms, WiFi communication can be restored by set
3816 * "bt_coex_active" module parameter to "false"
3817 *
3818 * default: bt_coex_active = true (BT_COEX_ENABLE)
3819 */
3820 module_param_named(bt_coex_active, iwlagn_mod_params.bt_coex_active,
3821 bool, S_IRUGO);
3822 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bt co-exist (default: enable)");
3823
3824 module_param_named(led_mode, iwlagn_mod_params.led_mode, int, S_IRUGO);
3825 MODULE_PARM_DESC(led_mode, "0=system default, "
3826 "1=On(RF On)/Off(RF Off), 2=blinking (default: 0)");
3827
3828 /*
3829 * For now, keep using power level 1 instead of automatically
3830 * adjusting ...
3831 */
3832 module_param_named(no_sleep_autoadjust, iwlagn_mod_params.no_sleep_autoadjust,
3833 bool, S_IRUGO);
3834 MODULE_PARM_DESC(no_sleep_autoadjust,
3835 "don't automatically adjust sleep level "
3836 "according to maximum network latency (default: true)");
Linux with added FPC-III support