1 /******************************************************************************
3 * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
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.
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
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
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
28 *****************************************************************************/
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/pci.h>
34 #include <linux/slab.h>
35 #include <linux/dma-mapping.h>
36 #include <linux/delay.h>
37 #include <linux/sched.h>
38 #include <linux/skbuff.h>
39 #include <linux/netdevice.h>
40 #include <linux/wireless.h>
41 #include <linux/firmware.h>
42 #include <linux/etherdevice.h>
43 #include <linux/if_arp.h>
45 #include <net/mac80211.h>
47 #include <asm/div64.h>
49 #define DRV_NAME "iwlagn"
51 #include "iwl-eeprom.h"
55 #include "iwl-helpers.h"
57 #include "iwl-calib.h"
61 /******************************************************************************
65 ******************************************************************************/
68 * module name, copyright, version, etc.
70 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
72 #ifdef CONFIG_IWLWIFI_DEBUG
78 #define DRV_VERSION IWLWIFI_VERSION VD
81 MODULE_DESCRIPTION(DRV_DESCRIPTION);
82 MODULE_VERSION(DRV_VERSION);
83 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
84 MODULE_LICENSE("GPL");
85 MODULE_ALIAS("iwl4965");
88 * iwl_commit_rxon - commit staging_rxon to hardware
90 * The RXON command in staging_rxon is committed to the hardware and
91 * the active_rxon structure is updated with the new data. This
92 * function correctly transitions out of the RXON_ASSOC_MSK state if
93 * a HW tune is required based on the RXON structure changes.
95 int iwl_commit_rxon(struct iwl_priv *priv)
97 /* cast away the const for active_rxon in this function */
98 struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
101 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
103 if (!iwl_is_alive(priv))
106 /* always get timestamp with Rx frame */
107 priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
109 ret = iwl_check_rxon_cmd(priv);
111 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
116 * receive commit_rxon request
117 * abort any previous channel switch if still in process
119 if (priv->switch_rxon.switch_in_progress &&
120 (priv->switch_rxon.channel != priv->staging_rxon.channel)) {
121 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
122 le16_to_cpu(priv->switch_rxon.channel));
123 priv->switch_rxon.switch_in_progress = false;
126 /* If we don't need to send a full RXON, we can use
127 * iwl_rxon_assoc_cmd which is used to reconfigure filter
128 * and other flags for the current radio configuration. */
129 if (!iwl_full_rxon_required(priv)) {
130 ret = iwl_send_rxon_assoc(priv);
132 IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
136 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
137 iwl_print_rx_config_cmd(priv);
141 /* If we are currently associated and the new config requires
142 * an RXON_ASSOC and the new config wants the associated mask enabled,
143 * we must clear the associated from the active configuration
144 * before we apply the new config */
145 if (iwl_is_associated(priv) && new_assoc) {
146 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
147 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
149 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
150 sizeof(struct iwl_rxon_cmd),
153 /* If the mask clearing failed then we set
154 * active_rxon back to what it was previously */
156 active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
157 IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
160 iwl_clear_ucode_stations(priv, false);
161 iwl_restore_stations(priv);
162 ret = iwl_restore_default_wep_keys(priv);
164 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
169 IWL_DEBUG_INFO(priv, "Sending RXON\n"
170 "* with%s RXON_FILTER_ASSOC_MSK\n"
173 (new_assoc ? "" : "out"),
174 le16_to_cpu(priv->staging_rxon.channel),
175 priv->staging_rxon.bssid_addr);
177 iwl_set_rxon_hwcrypto(priv, !priv->cfg->mod_params->sw_crypto);
179 /* Apply the new configuration
180 * RXON unassoc clears the station table in uCode so restoration of
181 * stations is needed after it (the RXON command) completes
184 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
185 sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
187 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
190 IWL_DEBUG_INFO(priv, "Return from !new_assoc RXON.\n");
191 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
192 iwl_clear_ucode_stations(priv, false);
193 iwl_restore_stations(priv);
194 ret = iwl_restore_default_wep_keys(priv);
196 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
201 priv->start_calib = 0;
204 * allow CTS-to-self if possible for new association.
205 * this is relevant only for 5000 series and up,
206 * but will not damage 4965
208 priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
210 /* Apply the new configuration
211 * RXON assoc doesn't clear the station table in uCode,
213 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
214 sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
216 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
219 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
221 iwl_print_rx_config_cmd(priv);
223 iwl_init_sensitivity(priv);
225 /* If we issue a new RXON command which required a tune then we must
226 * send a new TXPOWER command or we won't be able to Tx any frames */
227 ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
229 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
236 void iwl_update_chain_flags(struct iwl_priv *priv)
239 if (priv->cfg->ops->hcmd->set_rxon_chain)
240 priv->cfg->ops->hcmd->set_rxon_chain(priv);
241 iwlcore_commit_rxon(priv);
244 static void iwl_clear_free_frames(struct iwl_priv *priv)
246 struct list_head *element;
248 IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
251 while (!list_empty(&priv->free_frames)) {
252 element = priv->free_frames.next;
254 kfree(list_entry(element, struct iwl_frame, list));
255 priv->frames_count--;
258 if (priv->frames_count) {
259 IWL_WARN(priv, "%d frames still in use. Did we lose one?\n",
261 priv->frames_count = 0;
265 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
267 struct iwl_frame *frame;
268 struct list_head *element;
269 if (list_empty(&priv->free_frames)) {
270 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
272 IWL_ERR(priv, "Could not allocate frame!\n");
276 priv->frames_count++;
280 element = priv->free_frames.next;
282 return list_entry(element, struct iwl_frame, list);
285 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
287 memset(frame, 0, sizeof(*frame));
288 list_add(&frame->list, &priv->free_frames);
291 static u32 iwl_fill_beacon_frame(struct iwl_priv *priv,
292 struct ieee80211_hdr *hdr,
295 if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
296 ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
297 (priv->iw_mode != NL80211_IFTYPE_AP)))
300 if (priv->ibss_beacon->len > left)
303 memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
305 return priv->ibss_beacon->len;
308 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
309 static void iwl_set_beacon_tim(struct iwl_priv *priv,
310 struct iwl_tx_beacon_cmd *tx_beacon_cmd,
311 u8 *beacon, u32 frame_size)
314 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
317 * The index is relative to frame start but we start looking at the
318 * variable-length part of the beacon.
320 tim_idx = mgmt->u.beacon.variable - beacon;
322 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
323 while ((tim_idx < (frame_size - 2)) &&
324 (beacon[tim_idx] != WLAN_EID_TIM))
325 tim_idx += beacon[tim_idx+1] + 2;
327 /* If TIM field was found, set variables */
328 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
329 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
330 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
332 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
335 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
336 struct iwl_frame *frame)
338 struct iwl_tx_beacon_cmd *tx_beacon_cmd;
343 * We have to set up the TX command, the TX Beacon command, and the
347 /* Initialize memory */
348 tx_beacon_cmd = &frame->u.beacon;
349 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
351 /* Set up TX beacon contents */
352 frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
353 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
354 if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE))
357 /* Set up TX command fields */
358 tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
359 tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
360 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
361 tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
362 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
364 /* Set up TX beacon command fields */
365 iwl_set_beacon_tim(priv, tx_beacon_cmd, (u8 *)tx_beacon_cmd->frame,
368 /* Set up packet rate and flags */
369 rate = iwl_rate_get_lowest_plcp(priv);
370 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant);
371 rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
372 if ((rate >= IWL_FIRST_CCK_RATE) && (rate <= IWL_LAST_CCK_RATE))
373 rate_flags |= RATE_MCS_CCK_MSK;
374 tx_beacon_cmd->tx.rate_n_flags = iwl_hw_set_rate_n_flags(rate,
377 return sizeof(*tx_beacon_cmd) + frame_size;
379 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
381 struct iwl_frame *frame;
382 unsigned int frame_size;
385 frame = iwl_get_free_frame(priv);
387 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
392 frame_size = iwl_hw_get_beacon_cmd(priv, frame);
394 IWL_ERR(priv, "Error configuring the beacon command\n");
395 iwl_free_frame(priv, frame);
399 rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
402 iwl_free_frame(priv, frame);
407 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
409 struct iwl_tfd_tb *tb = &tfd->tbs[idx];
411 dma_addr_t addr = get_unaligned_le32(&tb->lo);
412 if (sizeof(dma_addr_t) > sizeof(u32))
414 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
419 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
421 struct iwl_tfd_tb *tb = &tfd->tbs[idx];
423 return le16_to_cpu(tb->hi_n_len) >> 4;
426 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
427 dma_addr_t addr, u16 len)
429 struct iwl_tfd_tb *tb = &tfd->tbs[idx];
430 u16 hi_n_len = len << 4;
432 put_unaligned_le32(addr, &tb->lo);
433 if (sizeof(dma_addr_t) > sizeof(u32))
434 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
436 tb->hi_n_len = cpu_to_le16(hi_n_len);
438 tfd->num_tbs = idx + 1;
441 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
443 return tfd->num_tbs & 0x1f;
447 * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
448 * @priv - driver private data
451 * Does NOT advance any TFD circular buffer read/write indexes
452 * Does NOT free the TFD itself (which is within circular buffer)
454 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
456 struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
458 struct pci_dev *dev = priv->pci_dev;
459 int index = txq->q.read_ptr;
463 tfd = &tfd_tmp[index];
465 /* Sanity check on number of chunks */
466 num_tbs = iwl_tfd_get_num_tbs(tfd);
468 if (num_tbs >= IWL_NUM_OF_TBS) {
469 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
470 /* @todo issue fatal error, it is quite serious situation */
476 pci_unmap_single(dev,
477 pci_unmap_addr(&txq->meta[index], mapping),
478 pci_unmap_len(&txq->meta[index], len),
479 PCI_DMA_BIDIRECTIONAL);
481 /* Unmap chunks, if any. */
482 for (i = 1; i < num_tbs; i++) {
483 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
484 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
487 dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
488 txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
493 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
494 struct iwl_tx_queue *txq,
495 dma_addr_t addr, u16 len,
499 struct iwl_tfd *tfd, *tfd_tmp;
503 tfd_tmp = (struct iwl_tfd *)txq->tfds;
504 tfd = &tfd_tmp[q->write_ptr];
507 memset(tfd, 0, sizeof(*tfd));
509 num_tbs = iwl_tfd_get_num_tbs(tfd);
511 /* Each TFD can point to a maximum 20 Tx buffers */
512 if (num_tbs >= IWL_NUM_OF_TBS) {
513 IWL_ERR(priv, "Error can not send more than %d chunks\n",
518 BUG_ON(addr & ~DMA_BIT_MASK(36));
519 if (unlikely(addr & ~IWL_TX_DMA_MASK))
520 IWL_ERR(priv, "Unaligned address = %llx\n",
521 (unsigned long long)addr);
523 iwl_tfd_set_tb(tfd, num_tbs, addr, len);
529 * Tell nic where to find circular buffer of Tx Frame Descriptors for
530 * given Tx queue, and enable the DMA channel used for that queue.
532 * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
533 * channels supported in hardware.
535 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
536 struct iwl_tx_queue *txq)
538 int txq_id = txq->q.id;
540 /* Circular buffer (TFD queue in DRAM) physical base address */
541 iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
542 txq->q.dma_addr >> 8);
547 /******************************************************************************
549 * Generic RX handler implementations
551 ******************************************************************************/
552 static void iwl_rx_reply_alive(struct iwl_priv *priv,
553 struct iwl_rx_mem_buffer *rxb)
555 struct iwl_rx_packet *pkt = rxb_addr(rxb);
556 struct iwl_alive_resp *palive;
557 struct delayed_work *pwork;
559 palive = &pkt->u.alive_frame;
561 IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
563 palive->is_valid, palive->ver_type,
564 palive->ver_subtype);
566 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
567 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
568 memcpy(&priv->card_alive_init,
570 sizeof(struct iwl_init_alive_resp));
571 pwork = &priv->init_alive_start;
573 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
574 memcpy(&priv->card_alive, &pkt->u.alive_frame,
575 sizeof(struct iwl_alive_resp));
576 pwork = &priv->alive_start;
579 /* We delay the ALIVE response by 5ms to
580 * give the HW RF Kill time to activate... */
581 if (palive->is_valid == UCODE_VALID_OK)
582 queue_delayed_work(priv->workqueue, pwork,
583 msecs_to_jiffies(5));
585 IWL_WARN(priv, "uCode did not respond OK.\n");
588 static void iwl_bg_beacon_update(struct work_struct *work)
590 struct iwl_priv *priv =
591 container_of(work, struct iwl_priv, beacon_update);
592 struct sk_buff *beacon;
594 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
595 beacon = ieee80211_beacon_get(priv->hw, priv->vif);
598 IWL_ERR(priv, "update beacon failed\n");
602 mutex_lock(&priv->mutex);
603 /* new beacon skb is allocated every time; dispose previous.*/
604 if (priv->ibss_beacon)
605 dev_kfree_skb(priv->ibss_beacon);
607 priv->ibss_beacon = beacon;
608 mutex_unlock(&priv->mutex);
610 iwl_send_beacon_cmd(priv);
614 * iwl_bg_statistics_periodic - Timer callback to queue statistics
616 * This callback is provided in order to send a statistics request.
618 * This timer function is continually reset to execute within
619 * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
620 * was received. We need to ensure we receive the statistics in order
621 * to update the temperature used for calibrating the TXPOWER.
623 static void iwl_bg_statistics_periodic(unsigned long data)
625 struct iwl_priv *priv = (struct iwl_priv *)data;
627 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
630 /* dont send host command if rf-kill is on */
631 if (!iwl_is_ready_rf(priv))
634 iwl_send_statistics_request(priv, CMD_ASYNC, false);
638 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
639 u32 start_idx, u32 num_events,
643 u32 ptr; /* SRAM byte address of log data */
644 u32 ev, time, data; /* event log data */
645 unsigned long reg_flags;
648 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
650 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
652 /* Make sure device is powered up for SRAM reads */
653 spin_lock_irqsave(&priv->reg_lock, reg_flags);
654 if (iwl_grab_nic_access(priv)) {
655 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
659 /* Set starting address; reads will auto-increment */
660 _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
664 * "time" is actually "data" for mode 0 (no timestamp).
665 * place event id # at far right for easier visual parsing.
667 for (i = 0; i < num_events; i++) {
668 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
669 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
671 trace_iwlwifi_dev_ucode_cont_event(priv,
674 data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
675 trace_iwlwifi_dev_ucode_cont_event(priv,
679 /* Allow device to power down */
680 iwl_release_nic_access(priv);
681 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
684 static void iwl_continuous_event_trace(struct iwl_priv *priv)
686 u32 capacity; /* event log capacity in # entries */
687 u32 base; /* SRAM byte address of event log header */
688 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
689 u32 num_wraps; /* # times uCode wrapped to top of log */
690 u32 next_entry; /* index of next entry to be written by uCode */
692 if (priv->ucode_type == UCODE_INIT)
693 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
695 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
696 if (priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
697 capacity = iwl_read_targ_mem(priv, base);
698 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
699 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
700 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
704 if (num_wraps == priv->event_log.num_wraps) {
705 iwl_print_cont_event_trace(priv,
706 base, priv->event_log.next_entry,
707 next_entry - priv->event_log.next_entry,
709 priv->event_log.non_wraps_count++;
711 if ((num_wraps - priv->event_log.num_wraps) > 1)
712 priv->event_log.wraps_more_count++;
714 priv->event_log.wraps_once_count++;
715 trace_iwlwifi_dev_ucode_wrap_event(priv,
716 num_wraps - priv->event_log.num_wraps,
717 next_entry, priv->event_log.next_entry);
718 if (next_entry < priv->event_log.next_entry) {
719 iwl_print_cont_event_trace(priv, base,
720 priv->event_log.next_entry,
721 capacity - priv->event_log.next_entry,
724 iwl_print_cont_event_trace(priv, base, 0,
727 iwl_print_cont_event_trace(priv, base,
728 next_entry, capacity - next_entry,
731 iwl_print_cont_event_trace(priv, base, 0,
735 priv->event_log.num_wraps = num_wraps;
736 priv->event_log.next_entry = next_entry;
740 * iwl_bg_ucode_trace - Timer callback to log ucode event
742 * The timer is continually set to execute every
743 * UCODE_TRACE_PERIOD milliseconds after the last timer expired
744 * this function is to perform continuous uCode event logging operation
747 static void iwl_bg_ucode_trace(unsigned long data)
749 struct iwl_priv *priv = (struct iwl_priv *)data;
751 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
754 if (priv->event_log.ucode_trace) {
755 iwl_continuous_event_trace(priv);
756 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
757 mod_timer(&priv->ucode_trace,
758 jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
762 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
763 struct iwl_rx_mem_buffer *rxb)
765 #ifdef CONFIG_IWLWIFI_DEBUG
766 struct iwl_rx_packet *pkt = rxb_addr(rxb);
767 struct iwl4965_beacon_notif *beacon =
768 (struct iwl4965_beacon_notif *)pkt->u.raw;
769 u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
771 IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
772 "tsf %d %d rate %d\n",
773 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
774 beacon->beacon_notify_hdr.failure_frame,
775 le32_to_cpu(beacon->ibss_mgr_status),
776 le32_to_cpu(beacon->high_tsf),
777 le32_to_cpu(beacon->low_tsf), rate);
780 if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
781 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
782 queue_work(priv->workqueue, &priv->beacon_update);
785 /* Handle notification from uCode that card's power state is changing
786 * due to software, hardware, or critical temperature RFKILL */
787 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
788 struct iwl_rx_mem_buffer *rxb)
790 struct iwl_rx_packet *pkt = rxb_addr(rxb);
791 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
792 unsigned long status = priv->status;
794 IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
795 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
796 (flags & SW_CARD_DISABLED) ? "Kill" : "On",
797 (flags & CT_CARD_DISABLED) ?
798 "Reached" : "Not reached");
800 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
803 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
804 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
806 iwl_write_direct32(priv, HBUS_TARG_MBX_C,
807 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
809 if (!(flags & RXON_CARD_DISABLED)) {
810 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
811 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
812 iwl_write_direct32(priv, HBUS_TARG_MBX_C,
813 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
815 if (flags & CT_CARD_DISABLED)
816 iwl_tt_enter_ct_kill(priv);
818 if (!(flags & CT_CARD_DISABLED))
819 iwl_tt_exit_ct_kill(priv);
821 if (flags & HW_CARD_DISABLED)
822 set_bit(STATUS_RF_KILL_HW, &priv->status);
824 clear_bit(STATUS_RF_KILL_HW, &priv->status);
827 if (!(flags & RXON_CARD_DISABLED))
828 iwl_scan_cancel(priv);
830 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
831 test_bit(STATUS_RF_KILL_HW, &priv->status)))
832 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
833 test_bit(STATUS_RF_KILL_HW, &priv->status));
835 wake_up_interruptible(&priv->wait_command_queue);
838 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
840 if (src == IWL_PWR_SRC_VAUX) {
841 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
842 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
843 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
844 ~APMG_PS_CTRL_MSK_PWR_SRC);
846 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
847 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
848 ~APMG_PS_CTRL_MSK_PWR_SRC);
855 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
857 * Setup the RX handlers for each of the reply types sent from the uCode
860 * This function chains into the hardware specific files for them to setup
861 * any hardware specific handlers as well.
863 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
865 priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
866 priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
867 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
868 priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
869 iwl_rx_spectrum_measure_notif;
870 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
871 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
872 iwl_rx_pm_debug_statistics_notif;
873 priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
876 * The same handler is used for both the REPLY to a discrete
877 * statistics request from the host as well as for the periodic
878 * statistics notifications (after received beacons) from the uCode.
880 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_reply_statistics;
881 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
883 iwl_setup_rx_scan_handlers(priv);
885 /* status change handler */
886 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
888 priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
889 iwl_rx_missed_beacon_notif;
891 priv->rx_handlers[REPLY_RX_PHY_CMD] = iwlagn_rx_reply_rx_phy;
892 priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwlagn_rx_reply_rx;
894 priv->rx_handlers[REPLY_COMPRESSED_BA] = iwlagn_rx_reply_compressed_ba;
895 /* Set up hardware specific Rx handlers */
896 priv->cfg->ops->lib->rx_handler_setup(priv);
900 * iwl_rx_handle - Main entry function for receiving responses from uCode
902 * Uses the priv->rx_handlers callback function array to invoke
903 * the appropriate handlers, including command responses,
904 * frame-received notifications, and other notifications.
906 void iwl_rx_handle(struct iwl_priv *priv)
908 struct iwl_rx_mem_buffer *rxb;
909 struct iwl_rx_packet *pkt;
910 struct iwl_rx_queue *rxq = &priv->rxq;
918 /* uCode's read index (stored in shared DRAM) indicates the last Rx
919 * buffer that the driver may process (last buffer filled by ucode). */
920 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
923 /* Rx interrupt, but nothing sent from uCode */
925 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
927 /* calculate total frames need to be restock after handling RX */
928 total_empty = r - rxq->write_actual;
930 total_empty += RX_QUEUE_SIZE;
932 if (total_empty > (RX_QUEUE_SIZE / 2))
938 /* If an RXB doesn't have a Rx queue slot associated with it,
939 * then a bug has been introduced in the queue refilling
940 * routines -- catch it here */
943 rxq->queue[i] = NULL;
945 pci_unmap_page(priv->pci_dev, rxb->page_dma,
946 PAGE_SIZE << priv->hw_params.rx_page_order,
950 trace_iwlwifi_dev_rx(priv, pkt,
951 le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
953 /* Reclaim a command buffer only if this packet is a response
954 * to a (driver-originated) command.
955 * If the packet (e.g. Rx frame) originated from uCode,
956 * there is no command buffer to reclaim.
957 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
958 * but apparently a few don't get set; catch them here. */
959 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
960 (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
961 (pkt->hdr.cmd != REPLY_RX) &&
962 (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
963 (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
964 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
965 (pkt->hdr.cmd != REPLY_TX);
967 /* Based on type of command response or notification,
968 * handle those that need handling via function in
969 * rx_handlers table. See iwl_setup_rx_handlers() */
970 if (priv->rx_handlers[pkt->hdr.cmd]) {
971 IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
972 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
973 priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
974 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
976 /* No handling needed */
978 "r %d i %d No handler needed for %s, 0x%02x\n",
979 r, i, get_cmd_string(pkt->hdr.cmd),
984 * XXX: After here, we should always check rxb->page
985 * against NULL before touching it or its virtual
986 * memory (pkt). Because some rx_handler might have
987 * already taken or freed the pages.
991 /* Invoke any callbacks, transfer the buffer to caller,
992 * and fire off the (possibly) blocking iwl_send_cmd()
993 * as we reclaim the driver command queue */
995 iwl_tx_cmd_complete(priv, rxb);
997 IWL_WARN(priv, "Claim null rxb?\n");
1000 /* Reuse the page if possible. For notification packets and
1001 * SKBs that fail to Rx correctly, add them back into the
1002 * rx_free list for reuse later. */
1003 spin_lock_irqsave(&rxq->lock, flags);
1004 if (rxb->page != NULL) {
1005 rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1006 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1007 PCI_DMA_FROMDEVICE);
1008 list_add_tail(&rxb->list, &rxq->rx_free);
1011 list_add_tail(&rxb->list, &rxq->rx_used);
1013 spin_unlock_irqrestore(&rxq->lock, flags);
1015 i = (i + 1) & RX_QUEUE_MASK;
1016 /* If there are a lot of unused frames,
1017 * restock the Rx queue so ucode wont assert. */
1022 iwlagn_rx_replenish_now(priv);
1028 /* Backtrack one entry */
1031 iwlagn_rx_replenish_now(priv);
1033 iwlagn_rx_queue_restock(priv);
1036 /* call this function to flush any scheduled tasklet */
1037 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1039 /* wait to make sure we flush pending tasklet*/
1040 synchronize_irq(priv->pci_dev->irq);
1041 tasklet_kill(&priv->irq_tasklet);
1044 static void iwl_irq_tasklet_legacy(struct iwl_priv *priv)
1046 u32 inta, handled = 0;
1048 unsigned long flags;
1050 #ifdef CONFIG_IWLWIFI_DEBUG
1054 spin_lock_irqsave(&priv->lock, flags);
1056 /* Ack/clear/reset pending uCode interrupts.
1057 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1058 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
1059 inta = iwl_read32(priv, CSR_INT);
1060 iwl_write32(priv, CSR_INT, inta);
1062 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1063 * Any new interrupts that happen after this, either while we're
1064 * in this tasklet, or later, will show up in next ISR/tasklet. */
1065 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1066 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1068 #ifdef CONFIG_IWLWIFI_DEBUG
1069 if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1070 /* just for debug */
1071 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1072 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1073 inta, inta_mask, inta_fh);
1077 spin_unlock_irqrestore(&priv->lock, flags);
1079 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1080 * atomic, make sure that inta covers all the interrupts that
1081 * we've discovered, even if FH interrupt came in just after
1082 * reading CSR_INT. */
1083 if (inta_fh & CSR49_FH_INT_RX_MASK)
1084 inta |= CSR_INT_BIT_FH_RX;
1085 if (inta_fh & CSR49_FH_INT_TX_MASK)
1086 inta |= CSR_INT_BIT_FH_TX;
1088 /* Now service all interrupt bits discovered above. */
1089 if (inta & CSR_INT_BIT_HW_ERR) {
1090 IWL_ERR(priv, "Hardware error detected. Restarting.\n");
1092 /* Tell the device to stop sending interrupts */
1093 iwl_disable_interrupts(priv);
1095 priv->isr_stats.hw++;
1096 iwl_irq_handle_error(priv);
1098 handled |= CSR_INT_BIT_HW_ERR;
1103 #ifdef CONFIG_IWLWIFI_DEBUG
1104 if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1105 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1106 if (inta & CSR_INT_BIT_SCD) {
1107 IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1108 "the frame/frames.\n");
1109 priv->isr_stats.sch++;
1112 /* Alive notification via Rx interrupt will do the real work */
1113 if (inta & CSR_INT_BIT_ALIVE) {
1114 IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1115 priv->isr_stats.alive++;
1119 /* Safely ignore these bits for debug checks below */
1120 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1122 /* HW RF KILL switch toggled */
1123 if (inta & CSR_INT_BIT_RF_KILL) {
1125 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1126 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1129 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1130 hw_rf_kill ? "disable radio" : "enable radio");
1132 priv->isr_stats.rfkill++;
1134 /* driver only loads ucode once setting the interface up.
1135 * the driver allows loading the ucode even if the radio
1136 * is killed. Hence update the killswitch state here. The
1137 * rfkill handler will care about restarting if needed.
1139 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1141 set_bit(STATUS_RF_KILL_HW, &priv->status);
1143 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1144 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1147 handled |= CSR_INT_BIT_RF_KILL;
1150 /* Chip got too hot and stopped itself */
1151 if (inta & CSR_INT_BIT_CT_KILL) {
1152 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1153 priv->isr_stats.ctkill++;
1154 handled |= CSR_INT_BIT_CT_KILL;
1157 /* Error detected by uCode */
1158 if (inta & CSR_INT_BIT_SW_ERR) {
1159 IWL_ERR(priv, "Microcode SW error detected. "
1160 " Restarting 0x%X.\n", inta);
1161 priv->isr_stats.sw++;
1162 priv->isr_stats.sw_err = inta;
1163 iwl_irq_handle_error(priv);
1164 handled |= CSR_INT_BIT_SW_ERR;
1168 * uCode wakes up after power-down sleep.
1169 * Tell device about any new tx or host commands enqueued,
1170 * and about any Rx buffers made available while asleep.
1172 if (inta & CSR_INT_BIT_WAKEUP) {
1173 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1174 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1175 for (i = 0; i < priv->hw_params.max_txq_num; i++)
1176 iwl_txq_update_write_ptr(priv, &priv->txq[i]);
1177 priv->isr_stats.wakeup++;
1178 handled |= CSR_INT_BIT_WAKEUP;
1181 /* All uCode command responses, including Tx command responses,
1182 * Rx "responses" (frame-received notification), and other
1183 * notifications from uCode come through here*/
1184 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1185 iwl_rx_handle(priv);
1186 priv->isr_stats.rx++;
1187 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1190 /* This "Tx" DMA channel is used only for loading uCode */
1191 if (inta & CSR_INT_BIT_FH_TX) {
1192 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1193 priv->isr_stats.tx++;
1194 handled |= CSR_INT_BIT_FH_TX;
1195 /* Wake up uCode load routine, now that load is complete */
1196 priv->ucode_write_complete = 1;
1197 wake_up_interruptible(&priv->wait_command_queue);
1200 if (inta & ~handled) {
1201 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1202 priv->isr_stats.unhandled++;
1205 if (inta & ~(priv->inta_mask)) {
1206 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1207 inta & ~priv->inta_mask);
1208 IWL_WARN(priv, " with FH_INT = 0x%08x\n", inta_fh);
1211 /* Re-enable all interrupts */
1212 /* only Re-enable if diabled by irq */
1213 if (test_bit(STATUS_INT_ENABLED, &priv->status))
1214 iwl_enable_interrupts(priv);
1216 #ifdef CONFIG_IWLWIFI_DEBUG
1217 if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1218 inta = iwl_read32(priv, CSR_INT);
1219 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1220 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1221 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1222 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1227 /* tasklet for iwlagn interrupt */
1228 static void iwl_irq_tasklet(struct iwl_priv *priv)
1232 unsigned long flags;
1234 #ifdef CONFIG_IWLWIFI_DEBUG
1238 spin_lock_irqsave(&priv->lock, flags);
1240 /* Ack/clear/reset pending uCode interrupts.
1241 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1243 /* There is a hardware bug in the interrupt mask function that some
1244 * interrupts (i.e. CSR_INT_BIT_SCD) can still be generated even if
1245 * they are disabled in the CSR_INT_MASK register. Furthermore the
1246 * ICT interrupt handling mechanism has another bug that might cause
1247 * these unmasked interrupts fail to be detected. We workaround the
1248 * hardware bugs here by ACKing all the possible interrupts so that
1249 * interrupt coalescing can still be achieved.
1251 iwl_write32(priv, CSR_INT, priv->_agn.inta | ~priv->inta_mask);
1253 inta = priv->_agn.inta;
1255 #ifdef CONFIG_IWLWIFI_DEBUG
1256 if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1257 /* just for debug */
1258 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1259 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
1264 spin_unlock_irqrestore(&priv->lock, flags);
1266 /* saved interrupt in inta variable now we can reset priv->_agn.inta */
1267 priv->_agn.inta = 0;
1269 /* Now service all interrupt bits discovered above. */
1270 if (inta & CSR_INT_BIT_HW_ERR) {
1271 IWL_ERR(priv, "Hardware error detected. Restarting.\n");
1273 /* Tell the device to stop sending interrupts */
1274 iwl_disable_interrupts(priv);
1276 priv->isr_stats.hw++;
1277 iwl_irq_handle_error(priv);
1279 handled |= CSR_INT_BIT_HW_ERR;
1284 #ifdef CONFIG_IWLWIFI_DEBUG
1285 if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1286 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1287 if (inta & CSR_INT_BIT_SCD) {
1288 IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1289 "the frame/frames.\n");
1290 priv->isr_stats.sch++;
1293 /* Alive notification via Rx interrupt will do the real work */
1294 if (inta & CSR_INT_BIT_ALIVE) {
1295 IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1296 priv->isr_stats.alive++;
1300 /* Safely ignore these bits for debug checks below */
1301 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1303 /* HW RF KILL switch toggled */
1304 if (inta & CSR_INT_BIT_RF_KILL) {
1306 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1307 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1310 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1311 hw_rf_kill ? "disable radio" : "enable radio");
1313 priv->isr_stats.rfkill++;
1315 /* driver only loads ucode once setting the interface up.
1316 * the driver allows loading the ucode even if the radio
1317 * is killed. Hence update the killswitch state here. The
1318 * rfkill handler will care about restarting if needed.
1320 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1322 set_bit(STATUS_RF_KILL_HW, &priv->status);
1324 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1325 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1328 handled |= CSR_INT_BIT_RF_KILL;
1331 /* Chip got too hot and stopped itself */
1332 if (inta & CSR_INT_BIT_CT_KILL) {
1333 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1334 priv->isr_stats.ctkill++;
1335 handled |= CSR_INT_BIT_CT_KILL;
1338 /* Error detected by uCode */
1339 if (inta & CSR_INT_BIT_SW_ERR) {
1340 IWL_ERR(priv, "Microcode SW error detected. "
1341 " Restarting 0x%X.\n", inta);
1342 priv->isr_stats.sw++;
1343 priv->isr_stats.sw_err = inta;
1344 iwl_irq_handle_error(priv);
1345 handled |= CSR_INT_BIT_SW_ERR;
1348 /* uCode wakes up after power-down sleep */
1349 if (inta & CSR_INT_BIT_WAKEUP) {
1350 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1351 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1352 for (i = 0; i < priv->hw_params.max_txq_num; i++)
1353 iwl_txq_update_write_ptr(priv, &priv->txq[i]);
1355 priv->isr_stats.wakeup++;
1357 handled |= CSR_INT_BIT_WAKEUP;
1360 /* All uCode command responses, including Tx command responses,
1361 * Rx "responses" (frame-received notification), and other
1362 * notifications from uCode come through here*/
1363 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
1364 CSR_INT_BIT_RX_PERIODIC)) {
1365 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
1366 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1367 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1368 iwl_write32(priv, CSR_FH_INT_STATUS,
1369 CSR49_FH_INT_RX_MASK);
1371 if (inta & CSR_INT_BIT_RX_PERIODIC) {
1372 handled |= CSR_INT_BIT_RX_PERIODIC;
1373 iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
1375 /* Sending RX interrupt require many steps to be done in the
1377 * 1- write interrupt to current index in ICT table.
1379 * 3- update RX shared data to indicate last write index.
1380 * 4- send interrupt.
1381 * This could lead to RX race, driver could receive RX interrupt
1382 * but the shared data changes does not reflect this;
1383 * periodic interrupt will detect any dangling Rx activity.
1386 /* Disable periodic interrupt; we use it as just a one-shot. */
1387 iwl_write8(priv, CSR_INT_PERIODIC_REG,
1388 CSR_INT_PERIODIC_DIS);
1389 iwl_rx_handle(priv);
1392 * Enable periodic interrupt in 8 msec only if we received
1393 * real RX interrupt (instead of just periodic int), to catch
1394 * any dangling Rx interrupt. If it was just the periodic
1395 * interrupt, there was no dangling Rx activity, and no need
1396 * to extend the periodic interrupt; one-shot is enough.
1398 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
1399 iwl_write8(priv, CSR_INT_PERIODIC_REG,
1400 CSR_INT_PERIODIC_ENA);
1402 priv->isr_stats.rx++;
1405 /* This "Tx" DMA channel is used only for loading uCode */
1406 if (inta & CSR_INT_BIT_FH_TX) {
1407 iwl_write32(priv, CSR_FH_INT_STATUS, CSR49_FH_INT_TX_MASK);
1408 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1409 priv->isr_stats.tx++;
1410 handled |= CSR_INT_BIT_FH_TX;
1411 /* Wake up uCode load routine, now that load is complete */
1412 priv->ucode_write_complete = 1;
1413 wake_up_interruptible(&priv->wait_command_queue);
1416 if (inta & ~handled) {
1417 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1418 priv->isr_stats.unhandled++;
1421 if (inta & ~(priv->inta_mask)) {
1422 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1423 inta & ~priv->inta_mask);
1426 /* Re-enable all interrupts */
1427 /* only Re-enable if diabled by irq */
1428 if (test_bit(STATUS_INT_ENABLED, &priv->status))
1429 iwl_enable_interrupts(priv);
1432 /* the threshold ratio of actual_ack_cnt to expected_ack_cnt in percent */
1433 #define ACK_CNT_RATIO (50)
1434 #define BA_TIMEOUT_CNT (5)
1435 #define BA_TIMEOUT_MAX (16)
1438 * iwl_good_ack_health - checks for ACK count ratios, BA timeout retries.
1440 * When the ACK count ratio is 0 and aggregated BA timeout retries exceeding
1441 * the BA_TIMEOUT_MAX, reload firmware and bring system back to normal
1444 bool iwl_good_ack_health(struct iwl_priv *priv,
1445 struct iwl_rx_packet *pkt)
1448 int actual_ack_cnt_delta, expected_ack_cnt_delta;
1449 int ba_timeout_delta;
1451 actual_ack_cnt_delta =
1452 le32_to_cpu(pkt->u.stats.tx.actual_ack_cnt) -
1453 le32_to_cpu(priv->statistics.tx.actual_ack_cnt);
1454 expected_ack_cnt_delta =
1455 le32_to_cpu(pkt->u.stats.tx.expected_ack_cnt) -
1456 le32_to_cpu(priv->statistics.tx.expected_ack_cnt);
1458 le32_to_cpu(pkt->u.stats.tx.agg.ba_timeout) -
1459 le32_to_cpu(priv->statistics.tx.agg.ba_timeout);
1460 if ((priv->_agn.agg_tids_count > 0) &&
1461 (expected_ack_cnt_delta > 0) &&
1462 (((actual_ack_cnt_delta * 100) / expected_ack_cnt_delta)
1464 (ba_timeout_delta > BA_TIMEOUT_CNT)) {
1465 IWL_DEBUG_RADIO(priv, "actual_ack_cnt delta = %d,"
1466 " expected_ack_cnt = %d\n",
1467 actual_ack_cnt_delta, expected_ack_cnt_delta);
1469 #ifdef CONFIG_IWLWIFI_DEBUG
1470 IWL_DEBUG_RADIO(priv, "rx_detected_cnt delta = %d\n",
1471 priv->delta_statistics.tx.rx_detected_cnt);
1472 IWL_DEBUG_RADIO(priv,
1473 "ack_or_ba_timeout_collision delta = %d\n",
1474 priv->delta_statistics.tx.
1475 ack_or_ba_timeout_collision);
1477 IWL_DEBUG_RADIO(priv, "agg ba_timeout delta = %d\n",
1479 if (!actual_ack_cnt_delta &&
1480 (ba_timeout_delta >= BA_TIMEOUT_MAX))
1487 /******************************************************************************
1489 * uCode download functions
1491 ******************************************************************************/
1493 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1495 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1496 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1497 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1498 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1499 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1500 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1503 static void iwl_nic_start(struct iwl_priv *priv)
1505 /* Remove all resets to allow NIC to operate */
1506 iwl_write32(priv, CSR_RESET, 0);
1510 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
1511 static int iwl_mac_setup_register(struct iwl_priv *priv);
1513 static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first)
1515 const char *name_pre = priv->cfg->fw_name_pre;
1518 priv->fw_index = priv->cfg->ucode_api_max;
1522 if (priv->fw_index < priv->cfg->ucode_api_min) {
1523 IWL_ERR(priv, "no suitable firmware found!\n");
1527 sprintf(priv->firmware_name, "%s%d%s",
1528 name_pre, priv->fw_index, ".ucode");
1530 IWL_DEBUG_INFO(priv, "attempting to load firmware '%s'\n",
1531 priv->firmware_name);
1533 return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name,
1534 &priv->pci_dev->dev, GFP_KERNEL, priv,
1535 iwl_ucode_callback);
1539 * iwl_ucode_callback - callback when firmware was loaded
1541 * If loaded successfully, copies the firmware into buffers
1542 * for the card to fetch (via DMA).
1544 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
1546 struct iwl_priv *priv = context;
1547 struct iwl_ucode_header *ucode;
1548 const unsigned int api_max = priv->cfg->ucode_api_max;
1549 const unsigned int api_min = priv->cfg->ucode_api_min;
1553 u32 inst_size, data_size, init_size, init_data_size, boot_size;
1558 IWL_ERR(priv, "request for firmware file '%s' failed.\n",
1559 priv->firmware_name);
1563 IWL_DEBUG_INFO(priv, "Loaded firmware file '%s' (%zd bytes).\n",
1564 priv->firmware_name, ucode_raw->size);
1566 /* Make sure that we got at least the v1 header! */
1567 if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) {
1568 IWL_ERR(priv, "File size way too small!\n");
1572 /* Data from ucode file: header followed by uCode images */
1573 ucode = (struct iwl_ucode_header *)ucode_raw->data;
1575 priv->ucode_ver = le32_to_cpu(ucode->ver);
1576 api_ver = IWL_UCODE_API(priv->ucode_ver);
1577 build = priv->cfg->ops->ucode->get_build(ucode, api_ver);
1578 inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
1579 data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
1580 init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
1582 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
1583 boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
1584 src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
1586 /* api_ver should match the api version forming part of the
1587 * firmware filename ... but we don't check for that and only rely
1588 * on the API version read from firmware header from here on forward */
1590 if (api_ver < api_min || api_ver > api_max) {
1591 IWL_ERR(priv, "Driver unable to support your firmware API. "
1592 "Driver supports v%u, firmware is v%u.\n",
1597 if (api_ver != api_max)
1598 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1599 "got v%u. New firmware can be obtained "
1600 "from http://www.intellinuxwireless.org.\n",
1603 IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1604 IWL_UCODE_MAJOR(priv->ucode_ver),
1605 IWL_UCODE_MINOR(priv->ucode_ver),
1606 IWL_UCODE_API(priv->ucode_ver),
1607 IWL_UCODE_SERIAL(priv->ucode_ver));
1609 snprintf(priv->hw->wiphy->fw_version,
1610 sizeof(priv->hw->wiphy->fw_version),
1612 IWL_UCODE_MAJOR(priv->ucode_ver),
1613 IWL_UCODE_MINOR(priv->ucode_ver),
1614 IWL_UCODE_API(priv->ucode_ver),
1615 IWL_UCODE_SERIAL(priv->ucode_ver));
1618 IWL_DEBUG_INFO(priv, "Build %u\n", build);
1620 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
1621 IWL_DEBUG_INFO(priv, "NVM Type: %s, version: 0x%x\n",
1622 (priv->nvm_device_type == NVM_DEVICE_TYPE_OTP)
1623 ? "OTP" : "EEPROM", eeprom_ver);
1625 IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1627 IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1629 IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1631 IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1633 IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1635 IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1639 * For any of the failures below (before allocating pci memory)
1640 * we will try to load a version with a smaller API -- maybe the
1641 * user just got a corrupted version of the latest API.
1644 /* Verify size of file vs. image size info in file's header */
1645 if (ucode_raw->size !=
1646 priv->cfg->ops->ucode->get_header_size(api_ver) +
1647 inst_size + data_size + init_size +
1648 init_data_size + boot_size) {
1650 IWL_DEBUG_INFO(priv,
1651 "uCode file size %d does not match expected size\n",
1652 (int)ucode_raw->size);
1656 /* Verify that uCode images will fit in card's SRAM */
1657 if (inst_size > priv->hw_params.max_inst_size) {
1658 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1663 if (data_size > priv->hw_params.max_data_size) {
1664 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1668 if (init_size > priv->hw_params.max_inst_size) {
1669 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1673 if (init_data_size > priv->hw_params.max_data_size) {
1674 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1678 if (boot_size > priv->hw_params.max_bsm_size) {
1679 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1684 /* Allocate ucode buffers for card's bus-master loading ... */
1686 /* Runtime instructions and 2 copies of data:
1687 * 1) unmodified from disk
1688 * 2) backup cache for save/restore during power-downs */
1689 priv->ucode_code.len = inst_size;
1690 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1692 priv->ucode_data.len = data_size;
1693 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1695 priv->ucode_data_backup.len = data_size;
1696 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1698 if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1699 !priv->ucode_data_backup.v_addr)
1702 /* Initialization instructions and data */
1703 if (init_size && init_data_size) {
1704 priv->ucode_init.len = init_size;
1705 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1707 priv->ucode_init_data.len = init_data_size;
1708 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1710 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1714 /* Bootstrap (instructions only, no data) */
1716 priv->ucode_boot.len = boot_size;
1717 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1719 if (!priv->ucode_boot.v_addr)
1723 /* Copy images into buffers for card's bus-master reads ... */
1725 /* Runtime instructions (first block of data in file) */
1727 IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1728 memcpy(priv->ucode_code.v_addr, src, len);
1731 IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1732 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1734 /* Runtime data (2nd block)
1735 * NOTE: Copy into backup buffer will be done in iwl_up() */
1737 IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1738 memcpy(priv->ucode_data.v_addr, src, len);
1739 memcpy(priv->ucode_data_backup.v_addr, src, len);
1742 /* Initialization instructions (3rd block) */
1745 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1747 memcpy(priv->ucode_init.v_addr, src, len);
1751 /* Initialization data (4th block) */
1752 if (init_data_size) {
1753 len = init_data_size;
1754 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1756 memcpy(priv->ucode_init_data.v_addr, src, len);
1760 /* Bootstrap instructions (5th block) */
1762 IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1763 memcpy(priv->ucode_boot.v_addr, src, len);
1765 /**************************************************
1766 * This is still part of probe() in a sense...
1768 * 9. Setup and register with mac80211 and debugfs
1769 **************************************************/
1770 err = iwl_mac_setup_register(priv);
1774 err = iwl_dbgfs_register(priv, DRV_NAME);
1776 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
1778 /* We have our copies now, allow OS release its copies */
1779 release_firmware(ucode_raw);
1783 /* try next, if any */
1784 if (iwl_request_firmware(priv, false))
1786 release_firmware(ucode_raw);
1790 IWL_ERR(priv, "failed to allocate pci memory\n");
1791 iwl_dealloc_ucode_pci(priv);
1793 device_release_driver(&priv->pci_dev->dev);
1794 release_firmware(ucode_raw);
1797 static const char *desc_lookup_text[] = {
1802 "NMI_INTERRUPT_WDG",
1806 "HW_ERROR_TUNE_LOCK",
1807 "HW_ERROR_TEMPERATURE",
1808 "ILLEGAL_CHAN_FREQ",
1811 "NMI_INTERRUPT_HOST",
1812 "NMI_INTERRUPT_ACTION_PT",
1813 "NMI_INTERRUPT_UNKNOWN",
1814 "UCODE_VERSION_MISMATCH",
1815 "HW_ERROR_ABS_LOCK",
1816 "HW_ERROR_CAL_LOCK_FAIL",
1817 "NMI_INTERRUPT_INST_ACTION_PT",
1818 "NMI_INTERRUPT_DATA_ACTION_PT",
1820 "NMI_INTERRUPT_TRM",
1821 "NMI_INTERRUPT_BREAK_POINT"
1826 "ADVANCED SYSASSERT"
1829 static const char *desc_lookup(int i)
1831 int max = ARRAY_SIZE(desc_lookup_text) - 1;
1833 if (i < 0 || i > max)
1836 return desc_lookup_text[i];
1839 #define ERROR_START_OFFSET (1 * sizeof(u32))
1840 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
1842 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1845 u32 desc, time, count, base, data1;
1846 u32 blink1, blink2, ilink1, ilink2;
1849 if (priv->ucode_type == UCODE_INIT)
1850 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
1852 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1854 if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1856 "Not valid error log pointer 0x%08X for %s uCode\n",
1857 base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
1861 count = iwl_read_targ_mem(priv, base);
1863 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1864 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1865 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1866 priv->status, count);
1869 desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1870 pc = iwl_read_targ_mem(priv, base + 2 * sizeof(u32));
1871 blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1872 blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1873 ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1874 ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1875 data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1876 data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1877 line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1878 time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1879 hcmd = iwl_read_targ_mem(priv, base + 22 * sizeof(u32));
1881 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, data2, line,
1882 blink1, blink2, ilink1, ilink2);
1884 IWL_ERR(priv, "Desc Time "
1885 "data1 data2 line\n");
1886 IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
1887 desc_lookup(desc), desc, time, data1, data2, line);
1888 IWL_ERR(priv, "pc blink1 blink2 ilink1 ilink2 hcmd\n");
1889 IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X 0x%05X 0x%05X\n",
1890 pc, blink1, blink2, ilink1, ilink2, hcmd);
1893 #define EVENT_START_OFFSET (4 * sizeof(u32))
1896 * iwl_print_event_log - Dump error event log to syslog
1899 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1900 u32 num_events, u32 mode,
1901 int pos, char **buf, size_t bufsz)
1904 u32 base; /* SRAM byte address of event log header */
1905 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1906 u32 ptr; /* SRAM byte address of log data */
1907 u32 ev, time, data; /* event log data */
1908 unsigned long reg_flags;
1910 if (num_events == 0)
1912 if (priv->ucode_type == UCODE_INIT)
1913 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1915 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1918 event_size = 2 * sizeof(u32);
1920 event_size = 3 * sizeof(u32);
1922 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1924 /* Make sure device is powered up for SRAM reads */
1925 spin_lock_irqsave(&priv->reg_lock, reg_flags);
1926 iwl_grab_nic_access(priv);
1928 /* Set starting address; reads will auto-increment */
1929 _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1932 /* "time" is actually "data" for mode 0 (no timestamp).
1933 * place event id # at far right for easier visual parsing. */
1934 for (i = 0; i < num_events; i++) {
1935 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1936 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1940 pos += scnprintf(*buf + pos, bufsz - pos,
1941 "EVT_LOG:0x%08x:%04u\n",
1944 trace_iwlwifi_dev_ucode_event(priv, 0,
1946 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1950 data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1952 pos += scnprintf(*buf + pos, bufsz - pos,
1953 "EVT_LOGT:%010u:0x%08x:%04u\n",
1956 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1958 trace_iwlwifi_dev_ucode_event(priv, time,
1964 /* Allow device to power down */
1965 iwl_release_nic_access(priv);
1966 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1971 * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1973 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1974 u32 num_wraps, u32 next_entry,
1976 int pos, char **buf, size_t bufsz)
1979 * display the newest DEFAULT_LOG_ENTRIES entries
1980 * i.e the entries just before the next ont that uCode would fill.
1983 if (next_entry < size) {
1984 pos = iwl_print_event_log(priv,
1985 capacity - (size - next_entry),
1986 size - next_entry, mode,
1988 pos = iwl_print_event_log(priv, 0,
1992 pos = iwl_print_event_log(priv, next_entry - size,
1993 size, mode, pos, buf, bufsz);
1995 if (next_entry < size) {
1996 pos = iwl_print_event_log(priv, 0, next_entry,
1997 mode, pos, buf, bufsz);
1999 pos = iwl_print_event_log(priv, next_entry - size,
2000 size, mode, pos, buf, bufsz);
2006 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
2008 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
2009 char **buf, bool display)
2011 u32 base; /* SRAM byte address of event log header */
2012 u32 capacity; /* event log capacity in # entries */
2013 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
2014 u32 num_wraps; /* # times uCode wrapped to top of log */
2015 u32 next_entry; /* index of next entry to be written by uCode */
2016 u32 size; /* # entries that we'll print */
2020 if (priv->ucode_type == UCODE_INIT)
2021 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
2023 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
2025 if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
2027 "Invalid event log pointer 0x%08X for %s uCode\n",
2028 base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
2032 /* event log header */
2033 capacity = iwl_read_targ_mem(priv, base);
2034 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
2035 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
2036 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
2038 if (capacity > priv->cfg->max_event_log_size) {
2039 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
2040 capacity, priv->cfg->max_event_log_size);
2041 capacity = priv->cfg->max_event_log_size;
2044 if (next_entry > priv->cfg->max_event_log_size) {
2045 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
2046 next_entry, priv->cfg->max_event_log_size);
2047 next_entry = priv->cfg->max_event_log_size;
2050 size = num_wraps ? capacity : next_entry;
2052 /* bail out if nothing in log */
2054 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
2058 #ifdef CONFIG_IWLWIFI_DEBUG
2059 if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
2060 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
2061 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
2063 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
2064 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
2066 IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
2069 #ifdef CONFIG_IWLWIFI_DEBUG
2072 bufsz = capacity * 48;
2075 *buf = kmalloc(bufsz, GFP_KERNEL);
2079 if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
2081 * if uCode has wrapped back to top of log,
2082 * start at the oldest entry,
2083 * i.e the next one that uCode would fill.
2086 pos = iwl_print_event_log(priv, next_entry,
2087 capacity - next_entry, mode,
2089 /* (then/else) start at top of log */
2090 pos = iwl_print_event_log(priv, 0,
2091 next_entry, mode, pos, buf, bufsz);
2093 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
2094 next_entry, size, mode,
2097 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
2098 next_entry, size, mode,
2105 * iwl_alive_start - called after REPLY_ALIVE notification received
2106 * from protocol/runtime uCode (initialization uCode's
2107 * Alive gets handled by iwl_init_alive_start()).
2109 static void iwl_alive_start(struct iwl_priv *priv)
2113 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2115 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2116 /* We had an error bringing up the hardware, so take it
2117 * all the way back down so we can try again */
2118 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2122 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2123 * This is a paranoid check, because we would not have gotten the
2124 * "runtime" alive if code weren't properly loaded. */
2125 if (iwl_verify_ucode(priv)) {
2126 /* Runtime instruction load was bad;
2127 * take it all the way back down so we can try again */
2128 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2132 ret = priv->cfg->ops->lib->alive_notify(priv);
2135 "Could not complete ALIVE transition [ntf]: %d\n", ret);
2139 /* After the ALIVE response, we can send host commands to the uCode */
2140 set_bit(STATUS_ALIVE, &priv->status);
2142 if (priv->cfg->ops->lib->recover_from_tx_stall) {
2143 /* Enable timer to monitor the driver queues */
2144 mod_timer(&priv->monitor_recover,
2146 msecs_to_jiffies(priv->cfg->monitor_recover_period));
2149 if (iwl_is_rfkill(priv))
2152 ieee80211_wake_queues(priv->hw);
2154 priv->active_rate = IWL_RATES_MASK;
2156 /* Configure Tx antenna selection based on H/W config */
2157 if (priv->cfg->ops->hcmd->set_tx_ant)
2158 priv->cfg->ops->hcmd->set_tx_ant(priv, priv->cfg->valid_tx_ant);
2160 if (iwl_is_associated(priv)) {
2161 struct iwl_rxon_cmd *active_rxon =
2162 (struct iwl_rxon_cmd *)&priv->active_rxon;
2163 /* apply any changes in staging */
2164 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2165 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2167 /* Initialize our rx_config data */
2168 iwl_connection_init_rx_config(priv, priv->iw_mode);
2170 if (priv->cfg->ops->hcmd->set_rxon_chain)
2171 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2173 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2176 /* Configure Bluetooth device coexistence support */
2177 priv->cfg->ops->hcmd->send_bt_config(priv);
2179 iwl_reset_run_time_calib(priv);
2181 /* Configure the adapter for unassociated operation */
2182 iwlcore_commit_rxon(priv);
2184 /* At this point, the NIC is initialized and operational */
2185 iwl_rf_kill_ct_config(priv);
2187 iwl_leds_init(priv);
2189 IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2190 set_bit(STATUS_READY, &priv->status);
2191 wake_up_interruptible(&priv->wait_command_queue);
2193 iwl_power_update_mode(priv, true);
2194 IWL_DEBUG_INFO(priv, "Updated power mode\n");
2200 queue_work(priv->workqueue, &priv->restart);
2203 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2205 static void __iwl_down(struct iwl_priv *priv)
2207 unsigned long flags;
2208 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2210 IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2213 set_bit(STATUS_EXIT_PENDING, &priv->status);
2215 iwl_clear_ucode_stations(priv, true);
2217 /* Unblock any waiting calls */
2218 wake_up_interruptible_all(&priv->wait_command_queue);
2220 /* Wipe out the EXIT_PENDING status bit if we are not actually
2221 * exiting the module */
2223 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2225 /* stop and reset the on-board processor */
2226 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2228 /* tell the device to stop sending interrupts */
2229 spin_lock_irqsave(&priv->lock, flags);
2230 iwl_disable_interrupts(priv);
2231 spin_unlock_irqrestore(&priv->lock, flags);
2232 iwl_synchronize_irq(priv);
2234 if (priv->mac80211_registered)
2235 ieee80211_stop_queues(priv->hw);
2237 /* If we have not previously called iwl_init() then
2238 * clear all bits but the RF Kill bit and return */
2239 if (!iwl_is_init(priv)) {
2240 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2242 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2243 STATUS_GEO_CONFIGURED |
2244 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2245 STATUS_EXIT_PENDING;
2249 /* ...otherwise clear out all the status bits but the RF Kill
2250 * bit and continue taking the NIC down. */
2251 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2253 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2254 STATUS_GEO_CONFIGURED |
2255 test_bit(STATUS_FW_ERROR, &priv->status) <<
2257 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2258 STATUS_EXIT_PENDING;
2260 /* device going down, Stop using ICT table */
2261 iwl_disable_ict(priv);
2263 iwlagn_txq_ctx_stop(priv);
2264 iwlagn_rxq_stop(priv);
2266 /* Power-down device's busmaster DMA clocks */
2267 iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2270 /* Make sure (redundant) we've released our request to stay awake */
2271 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2273 /* Stop the device, and put it in low power state */
2274 priv->cfg->ops->lib->apm_ops.stop(priv);
2277 memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2279 if (priv->ibss_beacon)
2280 dev_kfree_skb(priv->ibss_beacon);
2281 priv->ibss_beacon = NULL;
2283 /* clear out any free frames */
2284 iwl_clear_free_frames(priv);
2287 static void iwl_down(struct iwl_priv *priv)
2289 mutex_lock(&priv->mutex);
2291 mutex_unlock(&priv->mutex);
2293 iwl_cancel_deferred_work(priv);
2296 #define HW_READY_TIMEOUT (50)
2298 static int iwl_set_hw_ready(struct iwl_priv *priv)
2302 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2303 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2305 /* See if we got it */
2306 ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2307 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2308 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2310 if (ret != -ETIMEDOUT)
2311 priv->hw_ready = true;
2313 priv->hw_ready = false;
2315 IWL_DEBUG_INFO(priv, "hardware %s\n",
2316 (priv->hw_ready == 1) ? "ready" : "not ready");
2320 static int iwl_prepare_card_hw(struct iwl_priv *priv)
2324 IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter\n");
2326 ret = iwl_set_hw_ready(priv);
2330 /* If HW is not ready, prepare the conditions to check again */
2331 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2332 CSR_HW_IF_CONFIG_REG_PREPARE);
2334 ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2335 ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2336 CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2338 /* HW should be ready by now, check again. */
2339 if (ret != -ETIMEDOUT)
2340 iwl_set_hw_ready(priv);
2345 #define MAX_HW_RESTARTS 5
2347 static int __iwl_up(struct iwl_priv *priv)
2352 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2353 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2357 if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2358 IWL_ERR(priv, "ucode not available for device bringup\n");
2362 iwl_prepare_card_hw(priv);
2364 if (!priv->hw_ready) {
2365 IWL_WARN(priv, "Exit HW not ready\n");
2369 /* If platform's RF_KILL switch is NOT set to KILL */
2370 if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2371 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2373 set_bit(STATUS_RF_KILL_HW, &priv->status);
2375 if (iwl_is_rfkill(priv)) {
2376 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
2378 iwl_enable_interrupts(priv);
2379 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2383 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2385 ret = iwlagn_hw_nic_init(priv);
2387 IWL_ERR(priv, "Unable to init nic\n");
2391 /* make sure rfkill handshake bits are cleared */
2392 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2393 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2394 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2396 /* clear (again), then enable host interrupts */
2397 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2398 iwl_enable_interrupts(priv);
2400 /* really make sure rfkill handshake bits are cleared */
2401 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2402 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2404 /* Copy original ucode data image from disk into backup cache.
2405 * This will be used to initialize the on-board processor's
2406 * data SRAM for a clean start when the runtime program first loads. */
2407 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2408 priv->ucode_data.len);
2410 for (i = 0; i < MAX_HW_RESTARTS; i++) {
2412 /* load bootstrap state machine,
2413 * load bootstrap program into processor's memory,
2414 * prepare to load the "initialize" uCode */
2415 ret = priv->cfg->ops->lib->load_ucode(priv);
2418 IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
2423 /* start card; "initialize" will load runtime ucode */
2424 iwl_nic_start(priv);
2426 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2431 set_bit(STATUS_EXIT_PENDING, &priv->status);
2433 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2435 /* tried to restart and config the device for as long as our
2436 * patience could withstand */
2437 IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2442 /*****************************************************************************
2444 * Workqueue callbacks
2446 *****************************************************************************/
2448 static void iwl_bg_init_alive_start(struct work_struct *data)
2450 struct iwl_priv *priv =
2451 container_of(data, struct iwl_priv, init_alive_start.work);
2453 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2456 mutex_lock(&priv->mutex);
2457 priv->cfg->ops->lib->init_alive_start(priv);
2458 mutex_unlock(&priv->mutex);
2461 static void iwl_bg_alive_start(struct work_struct *data)
2463 struct iwl_priv *priv =
2464 container_of(data, struct iwl_priv, alive_start.work);
2466 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2469 /* enable dram interrupt */
2470 iwl_reset_ict(priv);
2472 mutex_lock(&priv->mutex);
2473 iwl_alive_start(priv);
2474 mutex_unlock(&priv->mutex);
2477 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2479 struct iwl_priv *priv = container_of(work, struct iwl_priv,
2480 run_time_calib_work);
2482 mutex_lock(&priv->mutex);
2484 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2485 test_bit(STATUS_SCANNING, &priv->status)) {
2486 mutex_unlock(&priv->mutex);
2490 if (priv->start_calib) {
2491 iwl_chain_noise_calibration(priv, &priv->statistics);
2493 iwl_sensitivity_calibration(priv, &priv->statistics);
2496 mutex_unlock(&priv->mutex);
2500 static void iwl_bg_restart(struct work_struct *data)
2502 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2504 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2507 if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2508 mutex_lock(&priv->mutex);
2511 mutex_unlock(&priv->mutex);
2513 ieee80211_restart_hw(priv->hw);
2517 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2520 mutex_lock(&priv->mutex);
2522 mutex_unlock(&priv->mutex);
2526 static void iwl_bg_rx_replenish(struct work_struct *data)
2528 struct iwl_priv *priv =
2529 container_of(data, struct iwl_priv, rx_replenish);
2531 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2534 mutex_lock(&priv->mutex);
2535 iwlagn_rx_replenish(priv);
2536 mutex_unlock(&priv->mutex);
2539 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2541 void iwl_post_associate(struct iwl_priv *priv)
2543 struct ieee80211_conf *conf = NULL;
2546 if (priv->iw_mode == NL80211_IFTYPE_AP) {
2547 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2551 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2555 if (!priv->vif || !priv->is_open)
2558 iwl_scan_cancel_timeout(priv, 200);
2560 conf = ieee80211_get_hw_conf(priv->hw);
2562 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2563 iwlcore_commit_rxon(priv);
2565 iwl_setup_rxon_timing(priv);
2566 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2567 sizeof(priv->rxon_timing), &priv->rxon_timing);
2569 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2570 "Attempting to continue.\n");
2572 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2574 iwl_set_rxon_ht(priv, &priv->current_ht_config);
2576 if (priv->cfg->ops->hcmd->set_rxon_chain)
2577 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2579 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2581 IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2582 priv->assoc_id, priv->beacon_int);
2584 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2585 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2587 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2589 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2590 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2591 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2593 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2595 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2596 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2600 iwlcore_commit_rxon(priv);
2602 IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2603 priv->assoc_id, priv->active_rxon.bssid_addr);
2605 switch (priv->iw_mode) {
2606 case NL80211_IFTYPE_STATION:
2609 case NL80211_IFTYPE_ADHOC:
2611 /* assume default assoc id */
2614 iwl_add_local_station(priv, priv->bssid, true);
2615 iwl_send_beacon_cmd(priv);
2620 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2621 __func__, priv->iw_mode);
2625 /* the chain noise calibration will enabled PM upon completion
2626 * If chain noise has already been run, then we need to enable
2627 * power management here */
2628 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2629 iwl_power_update_mode(priv, false);
2631 /* Enable Rx differential gain and sensitivity calibrations */
2632 iwl_chain_noise_reset(priv);
2633 priv->start_calib = 1;
2637 /*****************************************************************************
2639 * mac80211 entry point functions
2641 *****************************************************************************/
2643 #define UCODE_READY_TIMEOUT (4 * HZ)
2646 * Not a mac80211 entry point function, but it fits in with all the
2647 * other mac80211 functions grouped here.
2649 static int iwl_mac_setup_register(struct iwl_priv *priv)
2652 struct ieee80211_hw *hw = priv->hw;
2653 hw->rate_control_algorithm = "iwl-agn-rs";
2655 /* Tell mac80211 our characteristics */
2656 hw->flags = IEEE80211_HW_SIGNAL_DBM |
2657 IEEE80211_HW_NOISE_DBM |
2658 IEEE80211_HW_AMPDU_AGGREGATION |
2659 IEEE80211_HW_SPECTRUM_MGMT;
2661 if (!priv->cfg->broken_powersave)
2662 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2663 IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2665 if (priv->cfg->sku & IWL_SKU_N)
2666 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
2667 IEEE80211_HW_SUPPORTS_STATIC_SMPS;
2669 hw->sta_data_size = sizeof(struct iwl_station_priv);
2670 hw->wiphy->interface_modes =
2671 BIT(NL80211_IFTYPE_STATION) |
2672 BIT(NL80211_IFTYPE_ADHOC);
2674 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
2675 WIPHY_FLAG_DISABLE_BEACON_HINTS;
2678 * For now, disable PS by default because it affects
2679 * RX performance significantly.
2681 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2683 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
2684 /* we create the 802.11 header and a zero-length SSID element */
2685 hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
2687 /* Default value; 4 EDCA QOS priorities */
2690 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2692 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2693 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2694 &priv->bands[IEEE80211_BAND_2GHZ];
2695 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2696 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2697 &priv->bands[IEEE80211_BAND_5GHZ];
2699 ret = ieee80211_register_hw(priv->hw);
2701 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2704 priv->mac80211_registered = 1;
2710 static int iwl_mac_start(struct ieee80211_hw *hw)
2712 struct iwl_priv *priv = hw->priv;
2715 IWL_DEBUG_MAC80211(priv, "enter\n");
2717 /* we should be verifying the device is ready to be opened */
2718 mutex_lock(&priv->mutex);
2719 ret = __iwl_up(priv);
2720 mutex_unlock(&priv->mutex);
2725 if (iwl_is_rfkill(priv))
2728 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2730 /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2731 * mac80211 will not be run successfully. */
2732 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2733 test_bit(STATUS_READY, &priv->status),
2734 UCODE_READY_TIMEOUT);
2736 if (!test_bit(STATUS_READY, &priv->status)) {
2737 IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2738 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2743 iwl_led_start(priv);
2747 IWL_DEBUG_MAC80211(priv, "leave\n");
2751 static void iwl_mac_stop(struct ieee80211_hw *hw)
2753 struct iwl_priv *priv = hw->priv;
2755 IWL_DEBUG_MAC80211(priv, "enter\n");
2762 if (iwl_is_ready_rf(priv) || test_bit(STATUS_SCAN_HW, &priv->status)) {
2763 /* stop mac, cancel any scan request and clear
2764 * RXON_FILTER_ASSOC_MSK BIT
2766 mutex_lock(&priv->mutex);
2767 iwl_scan_cancel_timeout(priv, 100);
2768 mutex_unlock(&priv->mutex);
2773 flush_workqueue(priv->workqueue);
2775 /* enable interrupts again in order to receive rfkill changes */
2776 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2777 iwl_enable_interrupts(priv);
2779 IWL_DEBUG_MAC80211(priv, "leave\n");
2782 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2784 struct iwl_priv *priv = hw->priv;
2786 IWL_DEBUG_MACDUMP(priv, "enter\n");
2788 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2789 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2791 if (iwlagn_tx_skb(priv, skb))
2792 dev_kfree_skb_any(skb);
2794 IWL_DEBUG_MACDUMP(priv, "leave\n");
2795 return NETDEV_TX_OK;
2798 void iwl_config_ap(struct iwl_priv *priv)
2802 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2805 /* The following should be done only at AP bring up */
2806 if (!iwl_is_associated(priv)) {
2808 /* RXON - unassoc (to set timing command) */
2809 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2810 iwlcore_commit_rxon(priv);
2813 iwl_setup_rxon_timing(priv);
2814 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2815 sizeof(priv->rxon_timing), &priv->rxon_timing);
2817 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2818 "Attempting to continue.\n");
2820 /* AP has all antennas */
2821 priv->chain_noise_data.active_chains =
2822 priv->hw_params.valid_rx_ant;
2823 iwl_set_rxon_ht(priv, &priv->current_ht_config);
2824 if (priv->cfg->ops->hcmd->set_rxon_chain)
2825 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2827 /* FIXME: what should be the assoc_id for AP? */
2828 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2829 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2830 priv->staging_rxon.flags |=
2831 RXON_FLG_SHORT_PREAMBLE_MSK;
2833 priv->staging_rxon.flags &=
2834 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2836 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2837 if (priv->assoc_capability &
2838 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2839 priv->staging_rxon.flags |=
2840 RXON_FLG_SHORT_SLOT_MSK;
2842 priv->staging_rxon.flags &=
2843 ~RXON_FLG_SHORT_SLOT_MSK;
2845 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2846 priv->staging_rxon.flags &=
2847 ~RXON_FLG_SHORT_SLOT_MSK;
2849 /* restore RXON assoc */
2850 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2851 iwlcore_commit_rxon(priv);
2852 iwl_add_bcast_station(priv);
2854 iwl_send_beacon_cmd(priv);
2856 /* FIXME - we need to add code here to detect a totally new
2857 * configuration, reset the AP, unassoc, rxon timing, assoc,
2858 * clear sta table, add BCAST sta... */
2861 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2862 struct ieee80211_vif *vif,
2863 struct ieee80211_key_conf *keyconf,
2864 struct ieee80211_sta *sta,
2865 u32 iv32, u16 *phase1key)
2868 struct iwl_priv *priv = hw->priv;
2869 IWL_DEBUG_MAC80211(priv, "enter\n");
2871 iwl_update_tkip_key(priv, keyconf,
2872 sta ? sta->addr : iwl_bcast_addr,
2875 IWL_DEBUG_MAC80211(priv, "leave\n");
2878 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2879 struct ieee80211_vif *vif,
2880 struct ieee80211_sta *sta,
2881 struct ieee80211_key_conf *key)
2883 struct iwl_priv *priv = hw->priv;
2887 bool is_default_wep_key = false;
2889 IWL_DEBUG_MAC80211(priv, "enter\n");
2891 if (priv->cfg->mod_params->sw_crypto) {
2892 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2895 addr = sta ? sta->addr : iwl_bcast_addr;
2896 sta_id = iwl_find_station(priv, addr);
2897 if (sta_id == IWL_INVALID_STATION) {
2898 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2904 mutex_lock(&priv->mutex);
2905 iwl_scan_cancel_timeout(priv, 100);
2908 * If we are getting WEP group key and we didn't receive any key mapping
2909 * so far, we are in legacy wep mode (group key only), otherwise we are
2911 * In legacy wep mode, we use another host command to the uCode.
2913 if (key->alg == ALG_WEP && !sta && vif->type != NL80211_IFTYPE_AP) {
2915 is_default_wep_key = !priv->key_mapping_key;
2917 is_default_wep_key =
2918 (key->hw_key_idx == HW_KEY_DEFAULT);
2923 if (is_default_wep_key)
2924 ret = iwl_set_default_wep_key(priv, key);
2926 ret = iwl_set_dynamic_key(priv, key, sta_id);
2928 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2931 if (is_default_wep_key)
2932 ret = iwl_remove_default_wep_key(priv, key);
2934 ret = iwl_remove_dynamic_key(priv, key, sta_id);
2936 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2942 mutex_unlock(&priv->mutex);
2943 IWL_DEBUG_MAC80211(priv, "leave\n");
2948 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2949 struct ieee80211_vif *vif,
2950 enum ieee80211_ampdu_mlme_action action,
2951 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2953 struct iwl_priv *priv = hw->priv;
2956 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2959 if (!(priv->cfg->sku & IWL_SKU_N))
2963 case IEEE80211_AMPDU_RX_START:
2964 IWL_DEBUG_HT(priv, "start Rx\n");
2965 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2966 case IEEE80211_AMPDU_RX_STOP:
2967 IWL_DEBUG_HT(priv, "stop Rx\n");
2968 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2969 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2973 case IEEE80211_AMPDU_TX_START:
2974 IWL_DEBUG_HT(priv, "start Tx\n");
2975 ret = iwlagn_tx_agg_start(priv, sta->addr, tid, ssn);
2977 priv->_agn.agg_tids_count++;
2978 IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2979 priv->_agn.agg_tids_count);
2982 case IEEE80211_AMPDU_TX_STOP:
2983 IWL_DEBUG_HT(priv, "stop Tx\n");
2984 ret = iwlagn_tx_agg_stop(priv, sta->addr, tid);
2985 if ((ret == 0) && (priv->_agn.agg_tids_count > 0)) {
2986 priv->_agn.agg_tids_count--;
2987 IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2988 priv->_agn.agg_tids_count);
2990 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2994 case IEEE80211_AMPDU_TX_OPERATIONAL:
2998 IWL_DEBUG_HT(priv, "unknown\n");
3005 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
3006 struct ieee80211_low_level_stats *stats)
3008 struct iwl_priv *priv = hw->priv;
3011 IWL_DEBUG_MAC80211(priv, "enter\n");
3012 IWL_DEBUG_MAC80211(priv, "leave\n");
3017 static void iwl_mac_sta_notify(struct ieee80211_hw *hw,
3018 struct ieee80211_vif *vif,
3019 enum sta_notify_cmd cmd,
3020 struct ieee80211_sta *sta)
3022 struct iwl_priv *priv = hw->priv;
3023 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
3027 case STA_NOTIFY_SLEEP:
3028 WARN_ON(!sta_priv->client);
3029 sta_priv->asleep = true;
3030 if (atomic_read(&sta_priv->pending_frames) > 0)
3031 ieee80211_sta_block_awake(hw, sta, true);
3033 case STA_NOTIFY_AWAKE:
3034 WARN_ON(!sta_priv->client);
3035 if (!sta_priv->asleep)
3037 sta_priv->asleep = false;
3038 sta_id = iwl_find_station(priv, sta->addr);
3039 if (sta_id != IWL_INVALID_STATION)
3040 iwl_sta_modify_ps_wake(priv, sta_id);
3047 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
3048 struct ieee80211_vif *vif,
3049 struct ieee80211_sta *sta)
3051 struct iwl_priv *priv = hw->priv;
3052 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
3053 bool is_ap = priv->iw_mode == NL80211_IFTYPE_STATION;
3057 IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
3060 atomic_set(&sta_priv->pending_frames, 0);
3061 if (vif->type == NL80211_IFTYPE_AP)
3062 sta_priv->client = true;
3064 ret = iwl_add_station_common(priv, sta->addr, is_ap, &sta->ht_cap,
3067 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
3069 /* Should we return success if return code is EEXIST ? */
3073 /* Initialize rate scaling */
3074 IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
3076 iwl_rs_rate_init(priv, sta, sta_id);
3081 /*****************************************************************************
3085 *****************************************************************************/
3087 #ifdef CONFIG_IWLWIFI_DEBUG
3090 * The following adds a new attribute to the sysfs representation
3091 * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
3092 * used for controlling the debug level.
3094 * See the level definitions in iwl for details.
3096 * The debug_level being managed using sysfs below is a per device debug
3097 * level that is used instead of the global debug level if it (the per
3098 * device debug level) is set.
3100 static ssize_t show_debug_level(struct device *d,
3101 struct device_attribute *attr, char *buf)
3103 struct iwl_priv *priv = dev_get_drvdata(d);
3104 return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3106 static ssize_t store_debug_level(struct device *d,
3107 struct device_attribute *attr,
3108 const char *buf, size_t count)
3110 struct iwl_priv *priv = dev_get_drvdata(d);
3114 ret = strict_strtoul(buf, 0, &val);
3116 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
3118 priv->debug_level = val;
3119 if (iwl_alloc_traffic_mem(priv))
3121 "Not enough memory to generate traffic log\n");
3123 return strnlen(buf, count);
3126 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3127 show_debug_level, store_debug_level);
3130 #endif /* CONFIG_IWLWIFI_DEBUG */
3133 static ssize_t show_temperature(struct device *d,
3134 struct device_attribute *attr, char *buf)
3136 struct iwl_priv *priv = dev_get_drvdata(d);
3138 if (!iwl_is_alive(priv))
3141 return sprintf(buf, "%d\n", priv->temperature);
3144 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3146 static ssize_t show_tx_power(struct device *d,
3147 struct device_attribute *attr, char *buf)
3149 struct iwl_priv *priv = dev_get_drvdata(d);
3151 if (!iwl_is_ready_rf(priv))
3152 return sprintf(buf, "off\n");
3154 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3157 static ssize_t store_tx_power(struct device *d,
3158 struct device_attribute *attr,
3159 const char *buf, size_t count)
3161 struct iwl_priv *priv = dev_get_drvdata(d);
3165 ret = strict_strtoul(buf, 10, &val);
3167 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
3169 ret = iwl_set_tx_power(priv, val, false);
3171 IWL_ERR(priv, "failed setting tx power (0x%d).\n",
3179 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3181 static ssize_t show_rts_ht_protection(struct device *d,
3182 struct device_attribute *attr, char *buf)
3184 struct iwl_priv *priv = dev_get_drvdata(d);
3186 return sprintf(buf, "%s\n",
3187 priv->cfg->use_rts_for_ht ? "RTS/CTS" : "CTS-to-self");
3190 static ssize_t store_rts_ht_protection(struct device *d,
3191 struct device_attribute *attr,
3192 const char *buf, size_t count)
3194 struct iwl_priv *priv = dev_get_drvdata(d);
3198 ret = strict_strtoul(buf, 10, &val);
3200 IWL_INFO(priv, "Input is not in decimal form.\n");
3202 if (!iwl_is_associated(priv))
3203 priv->cfg->use_rts_for_ht = val ? true : false;
3205 IWL_ERR(priv, "Sta associated with AP - "
3206 "Change protection mechanism is not allowed\n");
3212 static DEVICE_ATTR(rts_ht_protection, S_IWUSR | S_IRUGO,
3213 show_rts_ht_protection, store_rts_ht_protection);
3216 /*****************************************************************************
3218 * driver setup and teardown
3220 *****************************************************************************/
3222 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3224 priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3226 init_waitqueue_head(&priv->wait_command_queue);
3228 INIT_WORK(&priv->restart, iwl_bg_restart);
3229 INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3230 INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3231 INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3232 INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3233 INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3235 iwl_setup_scan_deferred_work(priv);
3237 if (priv->cfg->ops->lib->setup_deferred_work)
3238 priv->cfg->ops->lib->setup_deferred_work(priv);
3240 init_timer(&priv->statistics_periodic);
3241 priv->statistics_periodic.data = (unsigned long)priv;
3242 priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3244 init_timer(&priv->ucode_trace);
3245 priv->ucode_trace.data = (unsigned long)priv;
3246 priv->ucode_trace.function = iwl_bg_ucode_trace;
3248 if (priv->cfg->ops->lib->recover_from_tx_stall) {
3249 init_timer(&priv->monitor_recover);
3250 priv->monitor_recover.data = (unsigned long)priv;
3251 priv->monitor_recover.function =
3252 priv->cfg->ops->lib->recover_from_tx_stall;
3255 if (!priv->cfg->use_isr_legacy)
3256 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3257 iwl_irq_tasklet, (unsigned long)priv);
3259 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3260 iwl_irq_tasklet_legacy, (unsigned long)priv);
3263 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3265 if (priv->cfg->ops->lib->cancel_deferred_work)
3266 priv->cfg->ops->lib->cancel_deferred_work(priv);
3268 cancel_delayed_work_sync(&priv->init_alive_start);
3269 cancel_delayed_work(&priv->scan_check);
3270 cancel_work_sync(&priv->start_internal_scan);
3271 cancel_delayed_work(&priv->alive_start);
3272 cancel_work_sync(&priv->beacon_update);
3273 del_timer_sync(&priv->statistics_periodic);
3274 del_timer_sync(&priv->ucode_trace);
3275 if (priv->cfg->ops->lib->recover_from_tx_stall)
3276 del_timer_sync(&priv->monitor_recover);
3279 static void iwl_init_hw_rates(struct iwl_priv *priv,
3280 struct ieee80211_rate *rates)
3284 for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
3285 rates[i].bitrate = iwl_rates[i].ieee * 5;
3286 rates[i].hw_value = i; /* Rate scaling will work on indexes */
3287 rates[i].hw_value_short = i;
3289 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
3291 * If CCK != 1M then set short preamble rate flag.
3294 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
3295 0 : IEEE80211_RATE_SHORT_PREAMBLE;
3300 static int iwl_init_drv(struct iwl_priv *priv)
3304 priv->ibss_beacon = NULL;
3306 spin_lock_init(&priv->sta_lock);
3307 spin_lock_init(&priv->hcmd_lock);
3309 INIT_LIST_HEAD(&priv->free_frames);
3311 mutex_init(&priv->mutex);
3312 mutex_init(&priv->sync_cmd_mutex);
3314 priv->ieee_channels = NULL;
3315 priv->ieee_rates = NULL;
3316 priv->band = IEEE80211_BAND_2GHZ;
3318 priv->iw_mode = NL80211_IFTYPE_STATION;
3319 priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
3320 priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3321 priv->_agn.agg_tids_count = 0;
3323 /* initialize force reset */
3324 priv->force_reset[IWL_RF_RESET].reset_duration =
3325 IWL_DELAY_NEXT_FORCE_RF_RESET;
3326 priv->force_reset[IWL_FW_RESET].reset_duration =
3327 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
3329 /* Choose which receivers/antennas to use */
3330 if (priv->cfg->ops->hcmd->set_rxon_chain)
3331 priv->cfg->ops->hcmd->set_rxon_chain(priv);
3333 iwl_init_scan_params(priv);
3335 /* Set the tx_power_user_lmt to the lowest power level
3336 * this value will get overwritten by channel max power avg
3338 priv->tx_power_user_lmt = IWLAGN_TX_POWER_TARGET_POWER_MIN;
3340 ret = iwl_init_channel_map(priv);
3342 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3346 ret = iwlcore_init_geos(priv);
3348 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3349 goto err_free_channel_map;
3351 iwl_init_hw_rates(priv, priv->ieee_rates);
3355 err_free_channel_map:
3356 iwl_free_channel_map(priv);
3361 static void iwl_uninit_drv(struct iwl_priv *priv)
3363 iwl_calib_free_results(priv);
3364 iwlcore_free_geos(priv);
3365 iwl_free_channel_map(priv);
3366 kfree(priv->scan_cmd);
3369 static struct attribute *iwl_sysfs_entries[] = {
3370 &dev_attr_temperature.attr,
3371 &dev_attr_tx_power.attr,
3372 &dev_attr_rts_ht_protection.attr,
3373 #ifdef CONFIG_IWLWIFI_DEBUG
3374 &dev_attr_debug_level.attr,
3379 static struct attribute_group iwl_attribute_group = {
3380 .name = NULL, /* put in device directory */
3381 .attrs = iwl_sysfs_entries,
3384 static struct ieee80211_ops iwl_hw_ops = {
3386 .start = iwl_mac_start,
3387 .stop = iwl_mac_stop,
3388 .add_interface = iwl_mac_add_interface,
3389 .remove_interface = iwl_mac_remove_interface,
3390 .config = iwl_mac_config,
3391 .configure_filter = iwl_configure_filter,
3392 .set_key = iwl_mac_set_key,
3393 .update_tkip_key = iwl_mac_update_tkip_key,
3394 .get_stats = iwl_mac_get_stats,
3395 .conf_tx = iwl_mac_conf_tx,
3396 .reset_tsf = iwl_mac_reset_tsf,
3397 .bss_info_changed = iwl_bss_info_changed,
3398 .ampdu_action = iwl_mac_ampdu_action,
3399 .hw_scan = iwl_mac_hw_scan,
3400 .sta_notify = iwl_mac_sta_notify,
3401 .sta_add = iwlagn_mac_sta_add,
3402 .sta_remove = iwl_mac_sta_remove,
3405 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3408 struct iwl_priv *priv;
3409 struct ieee80211_hw *hw;
3410 struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3411 unsigned long flags;
3414 /************************
3415 * 1. Allocating HW data
3416 ************************/
3418 /* Disabling hardware scan means that mac80211 will perform scans
3419 * "the hard way", rather than using device's scan. */
3420 if (cfg->mod_params->disable_hw_scan) {
3421 if (iwl_debug_level & IWL_DL_INFO)
3422 dev_printk(KERN_DEBUG, &(pdev->dev),
3423 "Disabling hw_scan\n");
3424 iwl_hw_ops.hw_scan = NULL;
3427 hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3433 /* At this point both hw and priv are allocated. */
3435 SET_IEEE80211_DEV(hw, &pdev->dev);
3437 IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3439 priv->pci_dev = pdev;
3440 priv->inta_mask = CSR_INI_SET_MASK;
3442 #ifdef CONFIG_IWLWIFI_DEBUG
3443 atomic_set(&priv->restrict_refcnt, 0);
3445 if (iwl_alloc_traffic_mem(priv))
3446 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3448 /**************************
3449 * 2. Initializing PCI bus
3450 **************************/
3451 if (pci_enable_device(pdev)) {
3453 goto out_ieee80211_free_hw;
3456 pci_set_master(pdev);
3458 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3460 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3462 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3464 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3465 /* both attempts failed: */
3467 IWL_WARN(priv, "No suitable DMA available.\n");
3468 goto out_pci_disable_device;
3472 err = pci_request_regions(pdev, DRV_NAME);
3474 goto out_pci_disable_device;
3476 pci_set_drvdata(pdev, priv);
3479 /***********************
3480 * 3. Read REV register
3481 ***********************/
3482 priv->hw_base = pci_iomap(pdev, 0, 0);
3483 if (!priv->hw_base) {
3485 goto out_pci_release_regions;
3488 IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3489 (unsigned long long) pci_resource_len(pdev, 0));
3490 IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3492 /* these spin locks will be used in apm_ops.init and EEPROM access
3493 * we should init now
3495 spin_lock_init(&priv->reg_lock);
3496 spin_lock_init(&priv->lock);
3499 * stop and reset the on-board processor just in case it is in a
3500 * strange state ... like being left stranded by a primary kernel
3501 * and this is now the kdump kernel trying to start up
3503 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3505 iwl_hw_detect(priv);
3506 IWL_INFO(priv, "Detected %s, REV=0x%X\n",
3507 priv->cfg->name, priv->hw_rev);
3509 /* We disable the RETRY_TIMEOUT register (0x41) to keep
3510 * PCI Tx retries from interfering with C3 CPU state */
3511 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3513 iwl_prepare_card_hw(priv);
3514 if (!priv->hw_ready) {
3515 IWL_WARN(priv, "Failed, HW not ready\n");
3522 /* Read the EEPROM */
3523 err = iwl_eeprom_init(priv);
3525 IWL_ERR(priv, "Unable to init EEPROM\n");
3528 err = iwl_eeprom_check_version(priv);
3530 goto out_free_eeprom;
3532 /* extract MAC Address */
3533 iwl_eeprom_get_mac(priv, priv->mac_addr);
3534 IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3535 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3537 /************************
3538 * 5. Setup HW constants
3539 ************************/
3540 if (iwl_set_hw_params(priv)) {
3541 IWL_ERR(priv, "failed to set hw parameters\n");
3542 goto out_free_eeprom;
3545 /*******************
3547 *******************/
3549 err = iwl_init_drv(priv);
3551 goto out_free_eeprom;
3552 /* At this point both hw and priv are initialized. */
3554 /********************
3556 ********************/
3557 spin_lock_irqsave(&priv->lock, flags);
3558 iwl_disable_interrupts(priv);
3559 spin_unlock_irqrestore(&priv->lock, flags);
3561 pci_enable_msi(priv->pci_dev);
3563 iwl_alloc_isr_ict(priv);
3564 err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
3565 IRQF_SHARED, DRV_NAME, priv);
3567 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3568 goto out_disable_msi;
3570 err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3572 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3576 iwl_setup_deferred_work(priv);
3577 iwl_setup_rx_handlers(priv);
3579 /*********************************************
3580 * 8. Enable interrupts and read RFKILL state
3581 *********************************************/
3583 /* enable interrupts if needed: hw bug w/a */
3584 pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3585 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3586 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3587 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3590 iwl_enable_interrupts(priv);
3592 /* If platform's RF_KILL switch is NOT set to KILL */
3593 if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3594 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3596 set_bit(STATUS_RF_KILL_HW, &priv->status);
3598 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3599 test_bit(STATUS_RF_KILL_HW, &priv->status));
3601 iwl_power_initialize(priv);
3602 iwl_tt_initialize(priv);
3604 err = iwl_request_firmware(priv, true);
3606 goto out_remove_sysfs;
3611 destroy_workqueue(priv->workqueue);
3612 priv->workqueue = NULL;
3613 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3615 free_irq(priv->pci_dev->irq, priv);
3616 iwl_free_isr_ict(priv);
3618 pci_disable_msi(priv->pci_dev);
3619 iwl_uninit_drv(priv);
3621 iwl_eeprom_free(priv);
3623 pci_iounmap(pdev, priv->hw_base);
3624 out_pci_release_regions:
3625 pci_set_drvdata(pdev, NULL);
3626 pci_release_regions(pdev);
3627 out_pci_disable_device:
3628 pci_disable_device(pdev);
3629 out_ieee80211_free_hw:
3630 iwl_free_traffic_mem(priv);
3631 ieee80211_free_hw(priv->hw);
3636 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3638 struct iwl_priv *priv = pci_get_drvdata(pdev);
3639 unsigned long flags;
3644 IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3646 iwl_dbgfs_unregister(priv);
3647 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3649 /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3650 * to be called and iwl_down since we are removing the device
3651 * we need to set STATUS_EXIT_PENDING bit.
3653 set_bit(STATUS_EXIT_PENDING, &priv->status);
3654 if (priv->mac80211_registered) {
3655 ieee80211_unregister_hw(priv->hw);
3656 priv->mac80211_registered = 0;
3662 * Make sure device is reset to low power before unloading driver.
3663 * This may be redundant with iwl_down(), but there are paths to
3664 * run iwl_down() without calling apm_ops.stop(), and there are
3665 * paths to avoid running iwl_down() at all before leaving driver.
3666 * This (inexpensive) call *makes sure* device is reset.
3668 priv->cfg->ops->lib->apm_ops.stop(priv);
3672 /* make sure we flush any pending irq or
3673 * tasklet for the driver
3675 spin_lock_irqsave(&priv->lock, flags);
3676 iwl_disable_interrupts(priv);
3677 spin_unlock_irqrestore(&priv->lock, flags);
3679 iwl_synchronize_irq(priv);
3681 iwl_dealloc_ucode_pci(priv);
3684 iwlagn_rx_queue_free(priv, &priv->rxq);
3685 iwlagn_hw_txq_ctx_free(priv);
3687 iwl_eeprom_free(priv);
3690 /*netif_stop_queue(dev); */
3691 flush_workqueue(priv->workqueue);
3693 /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3694 * priv->workqueue... so we can't take down the workqueue
3696 destroy_workqueue(priv->workqueue);
3697 priv->workqueue = NULL;
3698 iwl_free_traffic_mem(priv);
3700 free_irq(priv->pci_dev->irq, priv);
3701 pci_disable_msi(priv->pci_dev);
3702 pci_iounmap(pdev, priv->hw_base);
3703 pci_release_regions(pdev);
3704 pci_disable_device(pdev);
3705 pci_set_drvdata(pdev, NULL);
3707 iwl_uninit_drv(priv);
3709 iwl_free_isr_ict(priv);
3711 if (priv->ibss_beacon)
3712 dev_kfree_skb(priv->ibss_beacon);
3714 ieee80211_free_hw(priv->hw);
3718 /*****************************************************************************
3720 * driver and module entry point
3722 *****************************************************************************/
3724 /* Hardware specific file defines the PCI IDs table for that hardware module */
3725 static DEFINE_PCI_DEVICE_TABLE(iwl_hw_card_ids) = {
3726 #ifdef CONFIG_IWL4965
3727 {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3728 {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3729 #endif /* CONFIG_IWL4965 */
3730 #ifdef CONFIG_IWL5000
3731 /* 5100 Series WiFi */
3732 {IWL_PCI_DEVICE(0x4232, 0x1201, iwl5100_agn_cfg)}, /* Mini Card */
3733 {IWL_PCI_DEVICE(0x4232, 0x1301, iwl5100_agn_cfg)}, /* Half Mini Card */
3734 {IWL_PCI_DEVICE(0x4232, 0x1204, iwl5100_agn_cfg)}, /* Mini Card */
3735 {IWL_PCI_DEVICE(0x4232, 0x1304, iwl5100_agn_cfg)}, /* Half Mini Card */
3736 {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bgn_cfg)}, /* Mini Card */
3737 {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bgn_cfg)}, /* Half Mini Card */
3738 {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)}, /* Mini Card */
3739 {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)}, /* Half Mini Card */
3740 {IWL_PCI_DEVICE(0x4232, 0x1221, iwl5100_agn_cfg)}, /* Mini Card */
3741 {IWL_PCI_DEVICE(0x4232, 0x1321, iwl5100_agn_cfg)}, /* Half Mini Card */
3742 {IWL_PCI_DEVICE(0x4232, 0x1224, iwl5100_agn_cfg)}, /* Mini Card */
3743 {IWL_PCI_DEVICE(0x4232, 0x1324, iwl5100_agn_cfg)}, /* Half Mini Card */
3744 {IWL_PCI_DEVICE(0x4232, 0x1225, iwl5100_bgn_cfg)}, /* Mini Card */
3745 {IWL_PCI_DEVICE(0x4232, 0x1325, iwl5100_bgn_cfg)}, /* Half Mini Card */
3746 {IWL_PCI_DEVICE(0x4232, 0x1226, iwl5100_abg_cfg)}, /* Mini Card */
3747 {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)}, /* Half Mini Card */
3748 {IWL_PCI_DEVICE(0x4237, 0x1211, iwl5100_agn_cfg)}, /* Mini Card */
3749 {IWL_PCI_DEVICE(0x4237, 0x1311, iwl5100_agn_cfg)}, /* Half Mini Card */
3750 {IWL_PCI_DEVICE(0x4237, 0x1214, iwl5100_agn_cfg)}, /* Mini Card */
3751 {IWL_PCI_DEVICE(0x4237, 0x1314, iwl5100_agn_cfg)}, /* Half Mini Card */
3752 {IWL_PCI_DEVICE(0x4237, 0x1215, iwl5100_bgn_cfg)}, /* Mini Card */
3753 {IWL_PCI_DEVICE(0x4237, 0x1315, iwl5100_bgn_cfg)}, /* Half Mini Card */
3754 {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)}, /* Mini Card */
3755 {IWL_PCI_DEVICE(0x4237, 0x1316, iwl5100_abg_cfg)}, /* Half Mini Card */
3757 /* 5300 Series WiFi */
3758 {IWL_PCI_DEVICE(0x4235, 0x1021, iwl5300_agn_cfg)}, /* Mini Card */
3759 {IWL_PCI_DEVICE(0x4235, 0x1121, iwl5300_agn_cfg)}, /* Half Mini Card */
3760 {IWL_PCI_DEVICE(0x4235, 0x1024, iwl5300_agn_cfg)}, /* Mini Card */
3761 {IWL_PCI_DEVICE(0x4235, 0x1124, iwl5300_agn_cfg)}, /* Half Mini Card */
3762 {IWL_PCI_DEVICE(0x4235, 0x1001, iwl5300_agn_cfg)}, /* Mini Card */
3763 {IWL_PCI_DEVICE(0x4235, 0x1101, iwl5300_agn_cfg)}, /* Half Mini Card */
3764 {IWL_PCI_DEVICE(0x4235, 0x1004, iwl5300_agn_cfg)}, /* Mini Card */
3765 {IWL_PCI_DEVICE(0x4235, 0x1104, iwl5300_agn_cfg)}, /* Half Mini Card */
3766 {IWL_PCI_DEVICE(0x4236, 0x1011, iwl5300_agn_cfg)}, /* Mini Card */
3767 {IWL_PCI_DEVICE(0x4236, 0x1111, iwl5300_agn_cfg)}, /* Half Mini Card */
3768 {IWL_PCI_DEVICE(0x4236, 0x1014, iwl5300_agn_cfg)}, /* Mini Card */
3769 {IWL_PCI_DEVICE(0x4236, 0x1114, iwl5300_agn_cfg)}, /* Half Mini Card */
3771 /* 5350 Series WiFi/WiMax */
3772 {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)}, /* Mini Card */
3773 {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)}, /* Mini Card */
3774 {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)}, /* Mini Card */
3776 /* 5150 Series Wifi/WiMax */
3777 {IWL_PCI_DEVICE(0x423C, 0x1201, iwl5150_agn_cfg)}, /* Mini Card */
3778 {IWL_PCI_DEVICE(0x423C, 0x1301, iwl5150_agn_cfg)}, /* Half Mini Card */
3779 {IWL_PCI_DEVICE(0x423C, 0x1206, iwl5150_abg_cfg)}, /* Mini Card */
3780 {IWL_PCI_DEVICE(0x423C, 0x1306, iwl5150_abg_cfg)}, /* Half Mini Card */
3781 {IWL_PCI_DEVICE(0x423C, 0x1221, iwl5150_agn_cfg)}, /* Mini Card */
3782 {IWL_PCI_DEVICE(0x423C, 0x1321, iwl5150_agn_cfg)}, /* Half Mini Card */
3784 {IWL_PCI_DEVICE(0x423D, 0x1211, iwl5150_agn_cfg)}, /* Mini Card */
3785 {IWL_PCI_DEVICE(0x423D, 0x1311, iwl5150_agn_cfg)}, /* Half Mini Card */
3786 {IWL_PCI_DEVICE(0x423D, 0x1216, iwl5150_abg_cfg)}, /* Mini Card */
3787 {IWL_PCI_DEVICE(0x423D, 0x1316, iwl5150_abg_cfg)}, /* Half Mini Card */
3790 {IWL_PCI_DEVICE(0x422B, 0x1101, iwl6000_3agn_cfg)},
3791 {IWL_PCI_DEVICE(0x422B, 0x1121, iwl6000_3agn_cfg)},
3792 {IWL_PCI_DEVICE(0x422C, 0x1301, iwl6000i_2agn_cfg)},
3793 {IWL_PCI_DEVICE(0x422C, 0x1306, iwl6000i_2abg_cfg)},
3794 {IWL_PCI_DEVICE(0x422C, 0x1307, iwl6000i_2bg_cfg)},
3795 {IWL_PCI_DEVICE(0x422C, 0x1321, iwl6000i_2agn_cfg)},
3796 {IWL_PCI_DEVICE(0x422C, 0x1326, iwl6000i_2abg_cfg)},
3797 {IWL_PCI_DEVICE(0x4238, 0x1111, iwl6000_3agn_cfg)},
3798 {IWL_PCI_DEVICE(0x4239, 0x1311, iwl6000i_2agn_cfg)},
3799 {IWL_PCI_DEVICE(0x4239, 0x1316, iwl6000i_2abg_cfg)},
3801 /* 6x00 Series Gen2 */
3802 {IWL_PCI_DEVICE(0x0082, 0x1201, iwl6000g2_2agn_cfg)},
3803 {IWL_PCI_DEVICE(0x0082, 0x1301, iwl6000g2_2agn_cfg)},
3804 {IWL_PCI_DEVICE(0x0082, 0x1321, iwl6000g2_2agn_cfg)},
3805 {IWL_PCI_DEVICE(0x0085, 0x1311, iwl6000g2_2agn_cfg)},
3807 /* 6x50 WiFi/WiMax Series */
3808 {IWL_PCI_DEVICE(0x0087, 0x1301, iwl6050_2agn_cfg)},
3809 {IWL_PCI_DEVICE(0x0087, 0x1306, iwl6050_2abg_cfg)},
3810 {IWL_PCI_DEVICE(0x0087, 0x1321, iwl6050_2agn_cfg)},
3811 {IWL_PCI_DEVICE(0x0087, 0x1326, iwl6050_2abg_cfg)},
3812 {IWL_PCI_DEVICE(0x0089, 0x1311, iwl6050_2agn_cfg)},
3813 {IWL_PCI_DEVICE(0x0089, 0x1316, iwl6050_2abg_cfg)},
3815 /* 1000 Series WiFi */
3816 {IWL_PCI_DEVICE(0x0083, 0x1205, iwl1000_bgn_cfg)},
3817 {IWL_PCI_DEVICE(0x0083, 0x1305, iwl1000_bgn_cfg)},
3818 {IWL_PCI_DEVICE(0x0083, 0x1225, iwl1000_bgn_cfg)},
3819 {IWL_PCI_DEVICE(0x0083, 0x1325, iwl1000_bgn_cfg)},
3820 {IWL_PCI_DEVICE(0x0084, 0x1215, iwl1000_bgn_cfg)},
3821 {IWL_PCI_DEVICE(0x0084, 0x1315, iwl1000_bgn_cfg)},
3822 {IWL_PCI_DEVICE(0x0083, 0x1206, iwl1000_bg_cfg)},
3823 {IWL_PCI_DEVICE(0x0083, 0x1306, iwl1000_bg_cfg)},
3824 {IWL_PCI_DEVICE(0x0083, 0x1226, iwl1000_bg_cfg)},
3825 {IWL_PCI_DEVICE(0x0083, 0x1326, iwl1000_bg_cfg)},
3826 {IWL_PCI_DEVICE(0x0084, 0x1216, iwl1000_bg_cfg)},
3827 {IWL_PCI_DEVICE(0x0084, 0x1316, iwl1000_bg_cfg)},
3828 #endif /* CONFIG_IWL5000 */
3832 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3834 static struct pci_driver iwl_driver = {
3836 .id_table = iwl_hw_card_ids,
3837 .probe = iwl_pci_probe,
3838 .remove = __devexit_p(iwl_pci_remove),
3840 .suspend = iwl_pci_suspend,
3841 .resume = iwl_pci_resume,
3845 static int __init iwl_init(void)
3849 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3850 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3852 ret = iwlagn_rate_control_register();
3854 printk(KERN_ERR DRV_NAME
3855 "Unable to register rate control algorithm: %d\n", ret);
3859 ret = pci_register_driver(&iwl_driver);
3861 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3862 goto error_register;
3868 iwlagn_rate_control_unregister();
3872 static void __exit iwl_exit(void)
3874 pci_unregister_driver(&iwl_driver);
3875 iwlagn_rate_control_unregister();
3878 module_exit(iwl_exit);
3879 module_init(iwl_init);
3881 #ifdef CONFIG_IWLWIFI_DEBUG
3882 module_param_named(debug50, iwl_debug_level, uint, S_IRUGO);
3883 MODULE_PARM_DESC(debug50, "50XX debug output mask (deprecated)");
3884 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3885 MODULE_PARM_DESC(debug, "debug output mask");
3888 module_param_named(swcrypto50, iwlagn_mod_params.sw_crypto, bool, S_IRUGO);
3889 MODULE_PARM_DESC(swcrypto50,
3890 "using crypto in software (default 0 [hardware]) (deprecated)");
3891 module_param_named(swcrypto, iwlagn_mod_params.sw_crypto, int, S_IRUGO);
3892 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
3893 module_param_named(queues_num50,
3894 iwlagn_mod_params.num_of_queues, int, S_IRUGO);
3895 MODULE_PARM_DESC(queues_num50,
3896 "number of hw queues in 50xx series (deprecated)");
3897 module_param_named(queues_num, iwlagn_mod_params.num_of_queues, int, S_IRUGO);
3898 MODULE_PARM_DESC(queues_num, "number of hw queues.");
3899 module_param_named(11n_disable50, iwlagn_mod_params.disable_11n, int, S_IRUGO);
3900 MODULE_PARM_DESC(11n_disable50, "disable 50XX 11n functionality (deprecated)");
3901 module_param_named(11n_disable, iwlagn_mod_params.disable_11n, int, S_IRUGO);
3902 MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
3903 module_param_named(amsdu_size_8K50, iwlagn_mod_params.amsdu_size_8K,
3905 MODULE_PARM_DESC(amsdu_size_8K50,
3906 "enable 8K amsdu size in 50XX series (deprecated)");
3907 module_param_named(amsdu_size_8K, iwlagn_mod_params.amsdu_size_8K,
3909 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
3910 module_param_named(fw_restart50, iwlagn_mod_params.restart_fw, int, S_IRUGO);
3911 MODULE_PARM_DESC(fw_restart50,
3912 "restart firmware in case of error (deprecated)");
3913 module_param_named(fw_restart, iwlagn_mod_params.restart_fw, int, S_IRUGO);
3914 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
3916 disable_hw_scan, iwlagn_mod_params.disable_hw_scan, int, S_IRUGO);
3917 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");