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Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / drivers / net / wireless / intel / iwlegacy / 3945-mac.c
blob74fc76c00ebcfcf16e2357b459be757cf9c68f0f
1 // SPDX-License-Identifier: GPL-2.0-only
2 /******************************************************************************
3 *
4 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
5 *
6 * Portions of this file are derived from the ipw3945 project, as well
7 * as portions of the ieee80211 subsystem header files.
8 *
9 * Contact Information:
10 * Intel Linux Wireless <ilw@linux.intel.com>
11 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
12 *
13 *****************************************************************************/
14
15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/pci.h>
21 #include <linux/slab.h>
22 #include <linux/dma-mapping.h>
23 #include <linux/delay.h>
24 #include <linux/sched.h>
25 #include <linux/skbuff.h>
26 #include <linux/netdevice.h>
27 #include <linux/firmware.h>
28 #include <linux/etherdevice.h>
29 #include <linux/if_arp.h>
30
31 #include <net/ieee80211_radiotap.h>
32 #include <net/mac80211.h>
33
34 #include <asm/div64.h>
35
36 #define DRV_NAME "iwl3945"
37
38 #include "commands.h"
39 #include "common.h"
40 #include "3945.h"
41 #include "iwl-spectrum.h"
42
43 /*
44 * module name, copyright, version, etc.
45 */
46
47 #define DRV_DESCRIPTION \
48 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
49
50 #ifdef CONFIG_IWLEGACY_DEBUG
51 #define VD "d"
52 #else
53 #define VD
54 #endif
55
56 /*
57 * add "s" to indicate spectrum measurement included.
58 * we add it here to be consistent with previous releases in which
59 * this was configurable.
60 */
61 #define DRV_VERSION IWLWIFI_VERSION VD "s"
62 #define DRV_COPYRIGHT "Copyright(c) 2003-2011 Intel Corporation"
63 #define DRV_AUTHOR "<ilw@linux.intel.com>"
64
65 MODULE_DESCRIPTION(DRV_DESCRIPTION);
66 MODULE_VERSION(DRV_VERSION);
67 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
68 MODULE_LICENSE("GPL");
69
70 /* module parameters */
71 struct il_mod_params il3945_mod_params = {
72 .sw_crypto = 1,
73 .restart_fw = 1,
74 .disable_hw_scan = 1,
75 /* the rest are 0 by default */
76 };
77
78 /**
79 * il3945_get_antenna_flags - Get antenna flags for RXON command
80 * @il: eeprom and antenna fields are used to determine antenna flags
81 *
82 * il->eeprom39 is used to determine if antenna AUX/MAIN are reversed
83 * il3945_mod_params.antenna specifies the antenna diversity mode:
84 *
85 * IL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
86 * IL_ANTENNA_MAIN - Force MAIN antenna
87 * IL_ANTENNA_AUX - Force AUX antenna
88 */
89 __le32
90 il3945_get_antenna_flags(const struct il_priv *il)
91 {
92 struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
93
94 switch (il3945_mod_params.antenna) {
95 case IL_ANTENNA_DIVERSITY:
96 return 0;
97
98 case IL_ANTENNA_MAIN:
99 if (eeprom->antenna_switch_type)
100 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
101 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
102
103 case IL_ANTENNA_AUX:
104 if (eeprom->antenna_switch_type)
105 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
106 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
107 }
108
109 /* bad antenna selector value */
110 IL_ERR("Bad antenna selector value (0x%x)\n",
111 il3945_mod_params.antenna);
112
113 return 0; /* "diversity" is default if error */
114 }
115
116 static int
117 il3945_set_ccmp_dynamic_key_info(struct il_priv *il,
118 struct ieee80211_key_conf *keyconf, u8 sta_id)
119 {
120 unsigned long flags;
121 __le16 key_flags = 0;
122 int ret;
123
124 key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
125 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
126
127 if (sta_id == il->hw_params.bcast_id)
128 key_flags |= STA_KEY_MULTICAST_MSK;
129
130 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
131 keyconf->hw_key_idx = keyconf->keyidx;
132 key_flags &= ~STA_KEY_FLG_INVALID;
133
134 spin_lock_irqsave(&il->sta_lock, flags);
135 il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
136 il->stations[sta_id].keyinfo.keylen = keyconf->keylen;
137 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen);
138
139 memcpy(il->stations[sta_id].sta.key.key, keyconf->key, keyconf->keylen);
140
141 if ((il->stations[sta_id].sta.key.
142 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
143 il->stations[sta_id].sta.key.key_offset =
144 il_get_free_ucode_key_idx(il);
145 /* else, we are overriding an existing key => no need to allocated room
146 * in uCode. */
147
148 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
149 "no space for a new key");
150
151 il->stations[sta_id].sta.key.key_flags = key_flags;
152 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
153 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
154
155 D_INFO("hwcrypto: modify ucode station key info\n");
156
157 ret = il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC);
158
159 spin_unlock_irqrestore(&il->sta_lock, flags);
160
161 return ret;
162 }
163
164 static int
165 il3945_set_tkip_dynamic_key_info(struct il_priv *il,
166 struct ieee80211_key_conf *keyconf, u8 sta_id)
167 {
168 return -EOPNOTSUPP;
169 }
170
171 static int
172 il3945_set_wep_dynamic_key_info(struct il_priv *il,
173 struct ieee80211_key_conf *keyconf, u8 sta_id)
174 {
175 return -EOPNOTSUPP;
176 }
177
178 static int
179 il3945_clear_sta_key_info(struct il_priv *il, u8 sta_id)
180 {
181 unsigned long flags;
182 struct il_addsta_cmd sta_cmd;
183
184 spin_lock_irqsave(&il->sta_lock, flags);
185 memset(&il->stations[sta_id].keyinfo, 0, sizeof(struct il_hw_key));
186 memset(&il->stations[sta_id].sta.key, 0, sizeof(struct il4965_keyinfo));
187 il->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
188 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
189 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
190 memcpy(&sta_cmd, &il->stations[sta_id].sta,
191 sizeof(struct il_addsta_cmd));
192 spin_unlock_irqrestore(&il->sta_lock, flags);
193
194 D_INFO("hwcrypto: clear ucode station key info\n");
195 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
196 }
197
198 static int
199 il3945_set_dynamic_key(struct il_priv *il, struct ieee80211_key_conf *keyconf,
200 u8 sta_id)
201 {
202 int ret = 0;
203
204 keyconf->hw_key_idx = HW_KEY_DYNAMIC;
205
206 switch (keyconf->cipher) {
207 case WLAN_CIPHER_SUITE_CCMP:
208 ret = il3945_set_ccmp_dynamic_key_info(il, keyconf, sta_id);
209 break;
210 case WLAN_CIPHER_SUITE_TKIP:
211 ret = il3945_set_tkip_dynamic_key_info(il, keyconf, sta_id);
212 break;
213 case WLAN_CIPHER_SUITE_WEP40:
214 case WLAN_CIPHER_SUITE_WEP104:
215 ret = il3945_set_wep_dynamic_key_info(il, keyconf, sta_id);
216 break;
217 default:
218 IL_ERR("Unknown alg: %s alg=%x\n", __func__, keyconf->cipher);
219 ret = -EINVAL;
220 }
221
222 D_WEP("Set dynamic key: alg=%x len=%d idx=%d sta=%d ret=%d\n",
223 keyconf->cipher, keyconf->keylen, keyconf->keyidx, sta_id, ret);
224
225 return ret;
226 }
227
228 static int
229 il3945_remove_static_key(struct il_priv *il)
230 {
231 return -EOPNOTSUPP;
232 }
233
234 static int
235 il3945_set_static_key(struct il_priv *il, struct ieee80211_key_conf *key)
236 {
237 if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
238 key->cipher == WLAN_CIPHER_SUITE_WEP104)
239 return -EOPNOTSUPP;
240
241 IL_ERR("Static key invalid: cipher %x\n", key->cipher);
242 return -EINVAL;
243 }
244
245 static void
246 il3945_clear_free_frames(struct il_priv *il)
247 {
248 struct list_head *element;
249
250 D_INFO("%d frames on pre-allocated heap on clear.\n", il->frames_count);
251
252 while (!list_empty(&il->free_frames)) {
253 element = il->free_frames.next;
254 list_del(element);
255 kfree(list_entry(element, struct il3945_frame, list));
256 il->frames_count--;
257 }
258
259 if (il->frames_count) {
260 IL_WARN("%d frames still in use. Did we lose one?\n",
261 il->frames_count);
262 il->frames_count = 0;
263 }
264 }
265
266 static struct il3945_frame *
267 il3945_get_free_frame(struct il_priv *il)
268 {
269 struct il3945_frame *frame;
270 struct list_head *element;
271 if (list_empty(&il->free_frames)) {
272 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
273 if (!frame) {
274 IL_ERR("Could not allocate frame!\n");
275 return NULL;
276 }
277
278 il->frames_count++;
279 return frame;
280 }
281
282 element = il->free_frames.next;
283 list_del(element);
284 return list_entry(element, struct il3945_frame, list);
285 }
286
287 static void
288 il3945_free_frame(struct il_priv *il, struct il3945_frame *frame)
289 {
290 memset(frame, 0, sizeof(*frame));
291 list_add(&frame->list, &il->free_frames);
292 }
293
294 unsigned int
295 il3945_fill_beacon_frame(struct il_priv *il, struct ieee80211_hdr *hdr,
296 int left)
297 {
298
299 if (!il_is_associated(il) || !il->beacon_skb)
300 return 0;
301
302 if (il->beacon_skb->len > left)
303 return 0;
304
305 memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len);
306
307 return il->beacon_skb->len;
308 }
309
310 static int
311 il3945_send_beacon_cmd(struct il_priv *il)
312 {
313 struct il3945_frame *frame;
314 unsigned int frame_size;
315 int rc;
316 u8 rate;
317
318 frame = il3945_get_free_frame(il);
319
320 if (!frame) {
321 IL_ERR("Could not obtain free frame buffer for beacon "
322 "command.\n");
323 return -ENOMEM;
324 }
325
326 rate = il_get_lowest_plcp(il);
327
328 frame_size = il3945_hw_get_beacon_cmd(il, frame, rate);
329
330 rc = il_send_cmd_pdu(il, C_TX_BEACON, frame_size, &frame->u.cmd[0]);
331
332 il3945_free_frame(il, frame);
333
334 return rc;
335 }
336
337 static void
338 il3945_unset_hw_params(struct il_priv *il)
339 {
340 if (il->_3945.shared_virt)
341 dma_free_coherent(&il->pci_dev->dev,
342 sizeof(struct il3945_shared),
343 il->_3945.shared_virt, il->_3945.shared_phys);
344 }
345
346 static void
347 il3945_build_tx_cmd_hwcrypto(struct il_priv *il, struct ieee80211_tx_info *info,
348 struct il_device_cmd *cmd,
349 struct sk_buff *skb_frag, int sta_id)
350 {
351 struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload;
352 struct il_hw_key *keyinfo = &il->stations[sta_id].keyinfo;
353
354 tx_cmd->sec_ctl = 0;
355
356 switch (keyinfo->cipher) {
357 case WLAN_CIPHER_SUITE_CCMP:
358 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
359 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
360 D_TX("tx_cmd with AES hwcrypto\n");
361 break;
362
363 case WLAN_CIPHER_SUITE_TKIP:
364 break;
365
366 case WLAN_CIPHER_SUITE_WEP104:
367 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
368 fallthrough;
369 case WLAN_CIPHER_SUITE_WEP40:
370 tx_cmd->sec_ctl |=
371 TX_CMD_SEC_WEP | (info->control.hw_key->
372 hw_key_idx & TX_CMD_SEC_MSK) <<
373 TX_CMD_SEC_SHIFT;
374
375 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
376
377 D_TX("Configuring packet for WEP encryption " "with key %d\n",
378 info->control.hw_key->hw_key_idx);
379 break;
380
381 default:
382 IL_ERR("Unknown encode cipher %x\n", keyinfo->cipher);
383 break;
384 }
385 }
386
387 /*
388 * handle build C_TX command notification.
389 */
390 static void
391 il3945_build_tx_cmd_basic(struct il_priv *il, struct il_device_cmd *cmd,
392 struct ieee80211_tx_info *info,
393 struct ieee80211_hdr *hdr, u8 std_id)
394 {
395 struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload;
396 __le32 tx_flags = tx_cmd->tx_flags;
397 __le16 fc = hdr->frame_control;
398
399 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
400 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
401 tx_flags |= TX_CMD_FLG_ACK_MSK;
402 if (ieee80211_is_mgmt(fc))
403 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
404 if (ieee80211_is_probe_resp(fc) &&
405 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
406 tx_flags |= TX_CMD_FLG_TSF_MSK;
407 } else {
408 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
409 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
410 }
411
412 tx_cmd->sta_id = std_id;
413 if (ieee80211_has_morefrags(fc))
414 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
415
416 if (ieee80211_is_data_qos(fc)) {
417 u8 *qc = ieee80211_get_qos_ctl(hdr);
418 tx_cmd->tid_tspec = qc[0] & 0xf;
419 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
420 } else {
421 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
422 }
423
424 il_tx_cmd_protection(il, info, fc, &tx_flags);
425
426 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
427 if (ieee80211_is_mgmt(fc)) {
428 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
429 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
430 else
431 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
432 } else {
433 tx_cmd->timeout.pm_frame_timeout = 0;
434 }
435
436 tx_cmd->driver_txop = 0;
437 tx_cmd->tx_flags = tx_flags;
438 tx_cmd->next_frame_len = 0;
439 }
440
441 /*
442 * start C_TX command process
443 */
444 static int
445 il3945_tx_skb(struct il_priv *il,
446 struct ieee80211_sta *sta,
447 struct sk_buff *skb)
448 {
449 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
450 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
451 struct il3945_tx_cmd *tx_cmd;
452 struct il_tx_queue *txq = NULL;
453 struct il_queue *q = NULL;
454 struct il_device_cmd *out_cmd;
455 struct il_cmd_meta *out_meta;
456 dma_addr_t phys_addr;
457 dma_addr_t txcmd_phys;
458 int txq_id = skb_get_queue_mapping(skb);
459 u16 len, idx, hdr_len;
460 u16 firstlen, secondlen;
461 u8 sta_id;
462 u8 tid = 0;
463 __le16 fc;
464 u8 wait_write_ptr = 0;
465 unsigned long flags;
466
467 spin_lock_irqsave(&il->lock, flags);
468 if (il_is_rfkill(il)) {
469 D_DROP("Dropping - RF KILL\n");
470 goto drop_unlock;
471 }
472
473 if ((ieee80211_get_tx_rate(il->hw, info)->hw_value & 0xFF) ==
474 IL_INVALID_RATE) {
475 IL_ERR("ERROR: No TX rate available.\n");
476 goto drop_unlock;
477 }
478
479 fc = hdr->frame_control;
480
481 #ifdef CONFIG_IWLEGACY_DEBUG
482 if (ieee80211_is_auth(fc))
483 D_TX("Sending AUTH frame\n");
484 else if (ieee80211_is_assoc_req(fc))
485 D_TX("Sending ASSOC frame\n");
486 else if (ieee80211_is_reassoc_req(fc))
487 D_TX("Sending REASSOC frame\n");
488 #endif
489
490 spin_unlock_irqrestore(&il->lock, flags);
491
492 hdr_len = ieee80211_hdrlen(fc);
493
494 /* Find idx into station table for destination station */
495 sta_id = il_sta_id_or_broadcast(il, sta);
496 if (sta_id == IL_INVALID_STATION) {
497 D_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1);
498 goto drop;
499 }
500
501 D_RATE("station Id %d\n", sta_id);
502
503 if (ieee80211_is_data_qos(fc)) {
504 u8 *qc = ieee80211_get_qos_ctl(hdr);
505 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
506 if (unlikely(tid >= MAX_TID_COUNT))
507 goto drop;
508 }
509
510 /* Descriptor for chosen Tx queue */
511 txq = &il->txq[txq_id];
512 q = &txq->q;
513
514 if ((il_queue_space(q) < q->high_mark))
515 goto drop;
516
517 spin_lock_irqsave(&il->lock, flags);
518
519 idx = il_get_cmd_idx(q, q->write_ptr, 0);
520
521 txq->skbs[q->write_ptr] = skb;
522
523 /* Init first empty entry in queue's array of Tx/cmd buffers */
524 out_cmd = txq->cmd[idx];
525 out_meta = &txq->meta[idx];
526 tx_cmd = (struct il3945_tx_cmd *)out_cmd->cmd.payload;
527 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
528 memset(tx_cmd, 0, sizeof(*tx_cmd));
529
530 /*
531 * Set up the Tx-command (not MAC!) header.
532 * Store the chosen Tx queue and TFD idx within the sequence field;
533 * after Tx, uCode's Tx response will return this value so driver can
534 * locate the frame within the tx queue and do post-tx processing.
535 */
536 out_cmd->hdr.cmd = C_TX;
537 out_cmd->hdr.sequence =
538 cpu_to_le16((u16)
539 (QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr)));
540
541 /* Copy MAC header from skb into command buffer */
542 memcpy(tx_cmd->hdr, hdr, hdr_len);
543
544 if (info->control.hw_key)
545 il3945_build_tx_cmd_hwcrypto(il, info, out_cmd, skb, sta_id);
546
547 /* TODO need this for burst mode later on */
548 il3945_build_tx_cmd_basic(il, out_cmd, info, hdr, sta_id);
549
550 il3945_hw_build_tx_cmd_rate(il, out_cmd, info, hdr, sta_id);
551
552 /* Total # bytes to be transmitted */
553 tx_cmd->len = cpu_to_le16((u16) skb->len);
554
555 tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
556 tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
557
558 /*
559 * Use the first empty entry in this queue's command buffer array
560 * to contain the Tx command and MAC header concatenated together
561 * (payload data will be in another buffer).
562 * Size of this varies, due to varying MAC header length.
563 * If end is not dword aligned, we'll have 2 extra bytes at the end
564 * of the MAC header (device reads on dword boundaries).
565 * We'll tell device about this padding later.
566 */
567 len =
568 sizeof(struct il3945_tx_cmd) + sizeof(struct il_cmd_header) +
569 hdr_len;
570 firstlen = (len + 3) & ~3;
571
572 /* Physical address of this Tx command's header (not MAC header!),
573 * within command buffer array. */
574 txcmd_phys = dma_map_single(&il->pci_dev->dev, &out_cmd->hdr, firstlen,
575 DMA_TO_DEVICE);
576 if (unlikely(dma_mapping_error(&il->pci_dev->dev, txcmd_phys)))
577 goto drop_unlock;
578
579 /* Set up TFD's 2nd entry to point directly to remainder of skb,
580 * if any (802.11 null frames have no payload). */
581 secondlen = skb->len - hdr_len;
582 if (secondlen > 0) {
583 phys_addr = dma_map_single(&il->pci_dev->dev, skb->data + hdr_len,
584 secondlen, DMA_TO_DEVICE);
585 if (unlikely(dma_mapping_error(&il->pci_dev->dev, phys_addr)))
586 goto drop_unlock;
587 }
588
589 /* Add buffer containing Tx command and MAC(!) header to TFD's
590 * first entry */
591 il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0);
592 dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
593 dma_unmap_len_set(out_meta, len, firstlen);
594 if (secondlen > 0)
595 il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, secondlen, 0,
596 U32_PAD(secondlen));
597
598 if (!ieee80211_has_morefrags(hdr->frame_control)) {
599 txq->need_update = 1;
600 } else {
601 wait_write_ptr = 1;
602 txq->need_update = 0;
603 }
604
605 il_update_stats(il, true, fc, skb->len);
606
607 D_TX("sequence nr = 0X%x\n", le16_to_cpu(out_cmd->hdr.sequence));
608 D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
609 il_print_hex_dump(il, IL_DL_TX, tx_cmd, sizeof(*tx_cmd));
610 il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd->hdr,
611 ieee80211_hdrlen(fc));
612
613 /* Tell device the write idx *just past* this latest filled TFD */
614 q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
615 il_txq_update_write_ptr(il, txq);
616 spin_unlock_irqrestore(&il->lock, flags);
617
618 if (il_queue_space(q) < q->high_mark && il->mac80211_registered) {
619 if (wait_write_ptr) {
620 spin_lock_irqsave(&il->lock, flags);
621 txq->need_update = 1;
622 il_txq_update_write_ptr(il, txq);
623 spin_unlock_irqrestore(&il->lock, flags);
624 }
625
626 il_stop_queue(il, txq);
627 }
628
629 return 0;
630
631 drop_unlock:
632 spin_unlock_irqrestore(&il->lock, flags);
633 drop:
634 return -1;
635 }
636
637 static int
638 il3945_get_measurement(struct il_priv *il,
639 struct ieee80211_measurement_params *params, u8 type)
640 {
641 struct il_spectrum_cmd spectrum;
642 struct il_rx_pkt *pkt;
643 struct il_host_cmd cmd = {
644 .id = C_SPECTRUM_MEASUREMENT,
645 .data = (void *)&spectrum,
646 .flags = CMD_WANT_SKB,
647 };
648 u32 add_time = le64_to_cpu(params->start_time);
649 int rc;
650 int spectrum_resp_status;
651 int duration = le16_to_cpu(params->duration);
652
653 if (il_is_associated(il))
654 add_time =
655 il_usecs_to_beacons(il,
656 le64_to_cpu(params->start_time) -
657 il->_3945.last_tsf,
658 le16_to_cpu(il->timing.beacon_interval));
659
660 memset(&spectrum, 0, sizeof(spectrum));
661
662 spectrum.channel_count = cpu_to_le16(1);
663 spectrum.flags =
664 RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
665 spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
666 cmd.len = sizeof(spectrum);
667 spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
668
669 if (il_is_associated(il))
670 spectrum.start_time =
671 il_add_beacon_time(il, il->_3945.last_beacon_time, add_time,
672 le16_to_cpu(il->timing.beacon_interval));
673 else
674 spectrum.start_time = 0;
675
676 spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
677 spectrum.channels[0].channel = params->channel;
678 spectrum.channels[0].type = type;
679 if (il->active.flags & RXON_FLG_BAND_24G_MSK)
680 spectrum.flags |=
681 RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
682 RXON_FLG_TGG_PROTECT_MSK;
683
684 rc = il_send_cmd_sync(il, &cmd);
685 if (rc)
686 return rc;
687
688 pkt = (struct il_rx_pkt *)cmd.reply_page;
689 if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
690 IL_ERR("Bad return from N_RX_ON_ASSOC command\n");
691 rc = -EIO;
692 }
693
694 spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
695 switch (spectrum_resp_status) {
696 case 0: /* Command will be handled */
697 if (pkt->u.spectrum.id != 0xff) {
698 D_INFO("Replaced existing measurement: %d\n",
699 pkt->u.spectrum.id);
700 il->measurement_status &= ~MEASUREMENT_READY;
701 }
702 il->measurement_status |= MEASUREMENT_ACTIVE;
703 rc = 0;
704 break;
705
706 case 1: /* Command will not be handled */
707 rc = -EAGAIN;
708 break;
709 }
710
711 il_free_pages(il, cmd.reply_page);
712
713 return rc;
714 }
715
716 static void
717 il3945_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb)
718 {
719 struct il_rx_pkt *pkt = rxb_addr(rxb);
720 struct il_alive_resp *palive;
721 struct delayed_work *pwork;
722
723 palive = &pkt->u.alive_frame;
724
725 D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n",
726 palive->is_valid, palive->ver_type, palive->ver_subtype);
727
728 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
729 D_INFO("Initialization Alive received.\n");
730 memcpy(&il->card_alive_init, &pkt->u.alive_frame,
731 sizeof(struct il_alive_resp));
732 pwork = &il->init_alive_start;
733 } else {
734 D_INFO("Runtime Alive received.\n");
735 memcpy(&il->card_alive, &pkt->u.alive_frame,
736 sizeof(struct il_alive_resp));
737 pwork = &il->alive_start;
738 il3945_disable_events(il);
739 }
740
741 /* We delay the ALIVE response by 5ms to
742 * give the HW RF Kill time to activate... */
743 if (palive->is_valid == UCODE_VALID_OK)
744 queue_delayed_work(il->workqueue, pwork, msecs_to_jiffies(5));
745 else
746 IL_WARN("uCode did not respond OK.\n");
747 }
748
749 static void
750 il3945_hdl_add_sta(struct il_priv *il, struct il_rx_buf *rxb)
751 {
752 struct il_rx_pkt *pkt = rxb_addr(rxb);
753
754 D_RX("Received C_ADD_STA: 0x%02X\n", pkt->u.status);
755 }
756
757 static void
758 il3945_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb)
759 {
760 struct il_rx_pkt *pkt = rxb_addr(rxb);
761 struct il3945_beacon_notif *beacon = &(pkt->u.beacon_status);
762 #ifdef CONFIG_IWLEGACY_DEBUG
763 u8 rate = beacon->beacon_notify_hdr.rate;
764
765 D_RX("beacon status %x retries %d iss %d " "tsf %d %d rate %d\n",
766 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
767 beacon->beacon_notify_hdr.failure_frame,
768 le32_to_cpu(beacon->ibss_mgr_status),
769 le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate);
770 #endif
771
772 il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
773
774 }
775
776 /* Handle notification from uCode that card's power state is changing
777 * due to software, hardware, or critical temperature RFKILL */
778 static void
779 il3945_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb)
780 {
781 struct il_rx_pkt *pkt = rxb_addr(rxb);
782 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
783 unsigned long status = il->status;
784
785 IL_WARN("Card state received: HW:%s SW:%s\n",
786 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
787 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
788
789 _il_wr(il, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
790
791 if (flags & HW_CARD_DISABLED)
792 set_bit(S_RFKILL, &il->status);
793 else
794 clear_bit(S_RFKILL, &il->status);
795
796 il_scan_cancel(il);
797
798 if ((test_bit(S_RFKILL, &status) !=
799 test_bit(S_RFKILL, &il->status)))
800 wiphy_rfkill_set_hw_state(il->hw->wiphy,
801 test_bit(S_RFKILL, &il->status));
802 else
803 wake_up(&il->wait_command_queue);
804 }
805
806 /*
807 * il3945_setup_handlers - Initialize Rx handler callbacks
808 *
809 * Setup the RX handlers for each of the reply types sent from the uCode
810 * to the host.
811 *
812 * This function chains into the hardware specific files for them to setup
813 * any hardware specific handlers as well.
814 */
815 static void
816 il3945_setup_handlers(struct il_priv *il)
817 {
818 il->handlers[N_ALIVE] = il3945_hdl_alive;
819 il->handlers[C_ADD_STA] = il3945_hdl_add_sta;
820 il->handlers[N_ERROR] = il_hdl_error;
821 il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa;
822 il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement;
823 il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep;
824 il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats;
825 il->handlers[N_BEACON] = il3945_hdl_beacon;
826
827 /*
828 * The same handler is used for both the REPLY to a discrete
829 * stats request from the host as well as for the periodic
830 * stats notifications (after received beacons) from the uCode.
831 */
832 il->handlers[C_STATS] = il3945_hdl_c_stats;
833 il->handlers[N_STATS] = il3945_hdl_stats;
834
835 il_setup_rx_scan_handlers(il);
836 il->handlers[N_CARD_STATE] = il3945_hdl_card_state;
837
838 /* Set up hardware specific Rx handlers */
839 il3945_hw_handler_setup(il);
840 }
841
842 /************************** RX-FUNCTIONS ****************************/
843 /*
844 * Rx theory of operation
845 *
846 * The host allocates 32 DMA target addresses and passes the host address
847 * to the firmware at register IL_RFDS_TBL_LOWER + N * RFD_SIZE where N is
848 * 0 to 31
849 *
850 * Rx Queue Indexes
851 * The host/firmware share two idx registers for managing the Rx buffers.
852 *
853 * The READ idx maps to the first position that the firmware may be writing
854 * to -- the driver can read up to (but not including) this position and get
855 * good data.
856 * The READ idx is managed by the firmware once the card is enabled.
857 *
858 * The WRITE idx maps to the last position the driver has read from -- the
859 * position preceding WRITE is the last slot the firmware can place a packet.
860 *
861 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
862 * WRITE = READ.
863 *
864 * During initialization, the host sets up the READ queue position to the first
865 * IDX position, and WRITE to the last (READ - 1 wrapped)
866 *
867 * When the firmware places a packet in a buffer, it will advance the READ idx
868 * and fire the RX interrupt. The driver can then query the READ idx and
869 * process as many packets as possible, moving the WRITE idx forward as it
870 * resets the Rx queue buffers with new memory.
871 *
872 * The management in the driver is as follows:
873 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
874 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
875 * to replenish the iwl->rxq->rx_free.
876 * + In il3945_rx_replenish (scheduled) if 'processed' != 'read' then the
877 * iwl->rxq is replenished and the READ IDX is updated (updating the
878 * 'processed' and 'read' driver idxes as well)
879 * + A received packet is processed and handed to the kernel network stack,
880 * detached from the iwl->rxq. The driver 'processed' idx is updated.
881 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
882 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
883 * IDX is not incremented and iwl->status(RX_STALLED) is set. If there
884 * were enough free buffers and RX_STALLED is set it is cleared.
885 *
886 *
887 * Driver sequence:
888 *
889 * il3945_rx_replenish() Replenishes rx_free list from rx_used, and calls
890 * il3945_rx_queue_restock
891 * il3945_rx_queue_restock() Moves available buffers from rx_free into Rx
892 * queue, updates firmware pointers, and updates
893 * the WRITE idx. If insufficient rx_free buffers
894 * are available, schedules il3945_rx_replenish
895 *
896 * -- enable interrupts --
897 * ISR - il3945_rx() Detach il_rx_bufs from pool up to the
898 * READ IDX, detaching the SKB from the pool.
899 * Moves the packet buffer from queue to rx_used.
900 * Calls il3945_rx_queue_restock to refill any empty
901 * slots.
902 * ...
903 *
904 */
905
906 /*
907 * il3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
908 */
909 static inline __le32
910 il3945_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr)
911 {
912 return cpu_to_le32((u32) dma_addr);
913 }
914
915 /*
916 * il3945_rx_queue_restock - refill RX queue from pre-allocated pool
917 *
918 * If there are slots in the RX queue that need to be restocked,
919 * and we have free pre-allocated buffers, fill the ranks as much
920 * as we can, pulling from rx_free.
921 *
922 * This moves the 'write' idx forward to catch up with 'processed', and
923 * also updates the memory address in the firmware to reference the new
924 * target buffer.
925 */
926 static void
927 il3945_rx_queue_restock(struct il_priv *il)
928 {
929 struct il_rx_queue *rxq = &il->rxq;
930 struct list_head *element;
931 struct il_rx_buf *rxb;
932 unsigned long flags;
933
934 spin_lock_irqsave(&rxq->lock, flags);
935 while (il_rx_queue_space(rxq) > 0 && rxq->free_count) {
936 /* Get next free Rx buffer, remove from free list */
937 element = rxq->rx_free.next;
938 rxb = list_entry(element, struct il_rx_buf, list);
939 list_del(element);
940
941 /* Point to Rx buffer via next RBD in circular buffer */
942 rxq->bd[rxq->write] =
943 il3945_dma_addr2rbd_ptr(il, rxb->page_dma);
944 rxq->queue[rxq->write] = rxb;
945 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
946 rxq->free_count--;
947 }
948 spin_unlock_irqrestore(&rxq->lock, flags);
949 /* If the pre-allocated buffer pool is dropping low, schedule to
950 * refill it */
951 if (rxq->free_count <= RX_LOW_WATERMARK)
952 queue_work(il->workqueue, &il->rx_replenish);
953
954 /* If we've added more space for the firmware to place data, tell it.
955 * Increment device's write pointer in multiples of 8. */
956 if (rxq->write_actual != (rxq->write & ~0x7) ||
957 abs(rxq->write - rxq->read) > 7) {
958 spin_lock_irqsave(&rxq->lock, flags);
959 rxq->need_update = 1;
960 spin_unlock_irqrestore(&rxq->lock, flags);
961 il_rx_queue_update_write_ptr(il, rxq);
962 }
963 }
964
965 /*
966 * il3945_rx_replenish - Move all used packet from rx_used to rx_free
967 *
968 * When moving to rx_free an SKB is allocated for the slot.
969 *
970 * Also restock the Rx queue via il3945_rx_queue_restock.
971 * This is called as a scheduled work item (except for during initialization)
972 */
973 static void
974 il3945_rx_allocate(struct il_priv *il, gfp_t priority)
975 {
976 struct il_rx_queue *rxq = &il->rxq;
977 struct list_head *element;
978 struct il_rx_buf *rxb;
979 struct page *page;
980 dma_addr_t page_dma;
981 unsigned long flags;
982 gfp_t gfp_mask = priority;
983
984 while (1) {
985 spin_lock_irqsave(&rxq->lock, flags);
986 if (list_empty(&rxq->rx_used)) {
987 spin_unlock_irqrestore(&rxq->lock, flags);
988 return;
989 }
990 spin_unlock_irqrestore(&rxq->lock, flags);
991
992 if (rxq->free_count > RX_LOW_WATERMARK)
993 gfp_mask |= __GFP_NOWARN;
994
995 if (il->hw_params.rx_page_order > 0)
996 gfp_mask |= __GFP_COMP;
997
998 /* Alloc a new receive buffer */
999 page = alloc_pages(gfp_mask, il->hw_params.rx_page_order);
1000 if (!page) {
1001 if (net_ratelimit())
1002 D_INFO("Failed to allocate SKB buffer.\n");
1003 if (rxq->free_count <= RX_LOW_WATERMARK &&
1004 net_ratelimit())
1005 IL_ERR("Failed to allocate SKB buffer with %0x."
1006 "Only %u free buffers remaining.\n",
1007 priority, rxq->free_count);
1008 /* We don't reschedule replenish work here -- we will
1009 * call the restock method and if it still needs
1010 * more buffers it will schedule replenish */
1011 break;
1012 }
1013
1014 /* Get physical address of RB/SKB */
1015 page_dma =
1016 dma_map_page(&il->pci_dev->dev, page, 0,
1017 PAGE_SIZE << il->hw_params.rx_page_order,
1018 DMA_FROM_DEVICE);
1019
1020 if (unlikely(dma_mapping_error(&il->pci_dev->dev, page_dma))) {
1021 __free_pages(page, il->hw_params.rx_page_order);
1022 break;
1023 }
1024
1025 spin_lock_irqsave(&rxq->lock, flags);
1026
1027 if (list_empty(&rxq->rx_used)) {
1028 spin_unlock_irqrestore(&rxq->lock, flags);
1029 dma_unmap_page(&il->pci_dev->dev, page_dma,
1030 PAGE_SIZE << il->hw_params.rx_page_order,
1031 DMA_FROM_DEVICE);
1032 __free_pages(page, il->hw_params.rx_page_order);
1033 return;
1034 }
1035
1036 element = rxq->rx_used.next;
1037 rxb = list_entry(element, struct il_rx_buf, list);
1038 list_del(element);
1039
1040 rxb->page = page;
1041 rxb->page_dma = page_dma;
1042 list_add_tail(&rxb->list, &rxq->rx_free);
1043 rxq->free_count++;
1044 il->alloc_rxb_page++;
1045
1046 spin_unlock_irqrestore(&rxq->lock, flags);
1047 }
1048 }
1049
1050 void
1051 il3945_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq)
1052 {
1053 unsigned long flags;
1054 int i;
1055 spin_lock_irqsave(&rxq->lock, flags);
1056 INIT_LIST_HEAD(&rxq->rx_free);
1057 INIT_LIST_HEAD(&rxq->rx_used);
1058 /* Fill the rx_used queue with _all_ of the Rx buffers */
1059 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1060 /* In the reset function, these buffers may have been allocated
1061 * to an SKB, so we need to unmap and free potential storage */
1062 if (rxq->pool[i].page != NULL) {
1063 dma_unmap_page(&il->pci_dev->dev,
1064 rxq->pool[i].page_dma,
1065 PAGE_SIZE << il->hw_params.rx_page_order,
1066 DMA_FROM_DEVICE);
1067 __il_free_pages(il, rxq->pool[i].page);
1068 rxq->pool[i].page = NULL;
1069 }
1070 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1071 }
1072
1073 /* Set us so that we have processed and used all buffers, but have
1074 * not restocked the Rx queue with fresh buffers */
1075 rxq->read = rxq->write = 0;
1076 rxq->write_actual = 0;
1077 rxq->free_count = 0;
1078 spin_unlock_irqrestore(&rxq->lock, flags);
1079 }
1080
1081 void
1082 il3945_rx_replenish(void *data)
1083 {
1084 struct il_priv *il = data;
1085 unsigned long flags;
1086
1087 il3945_rx_allocate(il, GFP_KERNEL);
1088
1089 spin_lock_irqsave(&il->lock, flags);
1090 il3945_rx_queue_restock(il);
1091 spin_unlock_irqrestore(&il->lock, flags);
1092 }
1093
1094 static void
1095 il3945_rx_replenish_now(struct il_priv *il)
1096 {
1097 il3945_rx_allocate(il, GFP_ATOMIC);
1098
1099 il3945_rx_queue_restock(il);
1100 }
1101
1102 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1103 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1104 * This free routine walks the list of POOL entries and if SKB is set to
1105 * non NULL it is unmapped and freed
1106 */
1107 static void
1108 il3945_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq)
1109 {
1110 int i;
1111 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1112 if (rxq->pool[i].page != NULL) {
1113 dma_unmap_page(&il->pci_dev->dev,
1114 rxq->pool[i].page_dma,
1115 PAGE_SIZE << il->hw_params.rx_page_order,
1116 DMA_FROM_DEVICE);
1117 __il_free_pages(il, rxq->pool[i].page);
1118 rxq->pool[i].page = NULL;
1119 }
1120 }
1121
1122 dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1123 rxq->bd_dma);
1124 dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status),
1125 rxq->rb_stts, rxq->rb_stts_dma);
1126 rxq->bd = NULL;
1127 rxq->rb_stts = NULL;
1128 }
1129
1130 /* Convert linear signal-to-noise ratio into dB */
1131 static u8 ratio2dB[100] = {
1132 /* 0 1 2 3 4 5 6 7 8 9 */
1133 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1134 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1135 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1136 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1137 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1138 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1139 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1140 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1141 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1142 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
1143 };
1144
1145 /* Calculates a relative dB value from a ratio of linear
1146 * (i.e. not dB) signal levels.
1147 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1148 int
1149 il3945_calc_db_from_ratio(int sig_ratio)
1150 {
1151 /* 1000:1 or higher just report as 60 dB */
1152 if (sig_ratio >= 1000)
1153 return 60;
1154
1155 /* 100:1 or higher, divide by 10 and use table,
1156 * add 20 dB to make up for divide by 10 */
1157 if (sig_ratio >= 100)
1158 return 20 + (int)ratio2dB[sig_ratio / 10];
1159
1160 /* We shouldn't see this */
1161 if (sig_ratio < 1)
1162 return 0;
1163
1164 /* Use table for ratios 1:1 - 99:1 */
1165 return (int)ratio2dB[sig_ratio];
1166 }
1167
1168 /*
1169 * il3945_rx_handle - Main entry function for receiving responses from uCode
1170 *
1171 * Uses the il->handlers callback function array to invoke
1172 * the appropriate handlers, including command responses,
1173 * frame-received notifications, and other notifications.
1174 */
1175 static void
1176 il3945_rx_handle(struct il_priv *il)
1177 {
1178 struct il_rx_buf *rxb;
1179 struct il_rx_pkt *pkt;
1180 struct il_rx_queue *rxq = &il->rxq;
1181 u32 r, i;
1182 int reclaim;
1183 unsigned long flags;
1184 u8 fill_rx = 0;
1185 u32 count = 8;
1186 int total_empty = 0;
1187
1188 /* uCode's read idx (stored in shared DRAM) indicates the last Rx
1189 * buffer that the driver may process (last buffer filled by ucode). */
1190 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
1191 i = rxq->read;
1192
1193 /* calculate total frames need to be restock after handling RX */
1194 total_empty = r - rxq->write_actual;
1195 if (total_empty < 0)
1196 total_empty += RX_QUEUE_SIZE;
1197
1198 if (total_empty > (RX_QUEUE_SIZE / 2))
1199 fill_rx = 1;
1200 /* Rx interrupt, but nothing sent from uCode */
1201 if (i == r)
1202 D_RX("r = %d, i = %d\n", r, i);
1203
1204 while (i != r) {
1205 rxb = rxq->queue[i];
1206
1207 /* If an RXB doesn't have a Rx queue slot associated with it,
1208 * then a bug has been introduced in the queue refilling
1209 * routines -- catch it here */
1210 BUG_ON(rxb == NULL);
1211
1212 rxq->queue[i] = NULL;
1213
1214 dma_unmap_page(&il->pci_dev->dev, rxb->page_dma,
1215 PAGE_SIZE << il->hw_params.rx_page_order,
1216 DMA_FROM_DEVICE);
1217 pkt = rxb_addr(rxb);
1218 reclaim = il_need_reclaim(il, pkt);
1219
1220 /* Based on type of command response or notification,
1221 * handle those that need handling via function in
1222 * handlers table. See il3945_setup_handlers() */
1223 if (il->handlers[pkt->hdr.cmd]) {
1224 D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i,
1225 il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1226 il->isr_stats.handlers[pkt->hdr.cmd]++;
1227 il->handlers[pkt->hdr.cmd] (il, rxb);
1228 } else {
1229 /* No handling needed */
1230 D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r,
1231 i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1232 }
1233
1234 /*
1235 * XXX: After here, we should always check rxb->page
1236 * against NULL before touching it or its virtual
1237 * memory (pkt). Because some handler might have
1238 * already taken or freed the pages.
1239 */
1240
1241 if (reclaim) {
1242 /* Invoke any callbacks, transfer the buffer to caller,
1243 * and fire off the (possibly) blocking il_send_cmd()
1244 * as we reclaim the driver command queue */
1245 if (rxb->page)
1246 il_tx_cmd_complete(il, rxb);
1247 else
1248 IL_WARN("Claim null rxb?\n");
1249 }
1250
1251 /* Reuse the page if possible. For notification packets and
1252 * SKBs that fail to Rx correctly, add them back into the
1253 * rx_free list for reuse later. */
1254 spin_lock_irqsave(&rxq->lock, flags);
1255 if (rxb->page != NULL) {
1256 rxb->page_dma =
1257 dma_map_page(&il->pci_dev->dev, rxb->page, 0,
1258 PAGE_SIZE << il->hw_params.rx_page_order,
1259 DMA_FROM_DEVICE);
1260 if (unlikely(dma_mapping_error(&il->pci_dev->dev,
1261 rxb->page_dma))) {
1262 __il_free_pages(il, rxb->page);
1263 rxb->page = NULL;
1264 list_add_tail(&rxb->list, &rxq->rx_used);
1265 } else {
1266 list_add_tail(&rxb->list, &rxq->rx_free);
1267 rxq->free_count++;
1268 }
1269 } else
1270 list_add_tail(&rxb->list, &rxq->rx_used);
1271
1272 spin_unlock_irqrestore(&rxq->lock, flags);
1273
1274 i = (i + 1) & RX_QUEUE_MASK;
1275 /* If there are a lot of unused frames,
1276 * restock the Rx queue so ucode won't assert. */
1277 if (fill_rx) {
1278 count++;
1279 if (count >= 8) {
1280 rxq->read = i;
1281 il3945_rx_replenish_now(il);
1282 count = 0;
1283 }
1284 }
1285 }
1286
1287 /* Backtrack one entry */
1288 rxq->read = i;
1289 if (fill_rx)
1290 il3945_rx_replenish_now(il);
1291 else
1292 il3945_rx_queue_restock(il);
1293 }
1294
1295 /* call this function to flush any scheduled tasklet */
1296 static inline void
1297 il3945_synchronize_irq(struct il_priv *il)
1298 {
1299 /* wait to make sure we flush pending tasklet */
1300 synchronize_irq(il->pci_dev->irq);
1301 tasklet_kill(&il->irq_tasklet);
1302 }
1303
1304 static const char *
1305 il3945_desc_lookup(int i)
1306 {
1307 switch (i) {
1308 case 1:
1309 return "FAIL";
1310 case 2:
1311 return "BAD_PARAM";
1312 case 3:
1313 return "BAD_CHECKSUM";
1314 case 4:
1315 return "NMI_INTERRUPT";
1316 case 5:
1317 return "SYSASSERT";
1318 case 6:
1319 return "FATAL_ERROR";
1320 }
1321
1322 return "UNKNOWN";
1323 }
1324
1325 #define ERROR_START_OFFSET (1 * sizeof(u32))
1326 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
1327
1328 void
1329 il3945_dump_nic_error_log(struct il_priv *il)
1330 {
1331 u32 i;
1332 u32 desc, time, count, base, data1;
1333 u32 blink1, blink2, ilink1, ilink2;
1334
1335 base = le32_to_cpu(il->card_alive.error_event_table_ptr);
1336
1337 if (!il3945_hw_valid_rtc_data_addr(base)) {
1338 IL_ERR("Not valid error log pointer 0x%08X\n", base);
1339 return;
1340 }
1341
1342 count = il_read_targ_mem(il, base);
1343
1344 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1345 IL_ERR("Start IWL Error Log Dump:\n");
1346 IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count);
1347 }
1348
1349 IL_ERR("Desc Time asrtPC blink2 "
1350 "ilink1 nmiPC Line\n");
1351 for (i = ERROR_START_OFFSET;
1352 i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1353 i += ERROR_ELEM_SIZE) {
1354 desc = il_read_targ_mem(il, base + i);
1355 time = il_read_targ_mem(il, base + i + 1 * sizeof(u32));
1356 blink1 = il_read_targ_mem(il, base + i + 2 * sizeof(u32));
1357 blink2 = il_read_targ_mem(il, base + i + 3 * sizeof(u32));
1358 ilink1 = il_read_targ_mem(il, base + i + 4 * sizeof(u32));
1359 ilink2 = il_read_targ_mem(il, base + i + 5 * sizeof(u32));
1360 data1 = il_read_targ_mem(il, base + i + 6 * sizeof(u32));
1361
1362 IL_ERR("%-13s (0x%X) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1363 il3945_desc_lookup(desc), desc, time, blink1, blink2,
1364 ilink1, ilink2, data1);
1365 }
1366 }
1367
1368 static void
1369 il3945_irq_tasklet(struct tasklet_struct *t)
1370 {
1371 struct il_priv *il = from_tasklet(il, t, irq_tasklet);
1372 u32 inta, handled = 0;
1373 u32 inta_fh;
1374 unsigned long flags;
1375 #ifdef CONFIG_IWLEGACY_DEBUG
1376 u32 inta_mask;
1377 #endif
1378
1379 spin_lock_irqsave(&il->lock, flags);
1380
1381 /* Ack/clear/reset pending uCode interrupts.
1382 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1383 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
1384 inta = _il_rd(il, CSR_INT);
1385 _il_wr(il, CSR_INT, inta);
1386
1387 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1388 * Any new interrupts that happen after this, either while we're
1389 * in this tasklet, or later, will show up in next ISR/tasklet. */
1390 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
1391 _il_wr(il, CSR_FH_INT_STATUS, inta_fh);
1392
1393 #ifdef CONFIG_IWLEGACY_DEBUG
1394 if (il_get_debug_level(il) & IL_DL_ISR) {
1395 /* just for debug */
1396 inta_mask = _il_rd(il, CSR_INT_MASK);
1397 D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta,
1398 inta_mask, inta_fh);
1399 }
1400 #endif
1401
1402 spin_unlock_irqrestore(&il->lock, flags);
1403
1404 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1405 * atomic, make sure that inta covers all the interrupts that
1406 * we've discovered, even if FH interrupt came in just after
1407 * reading CSR_INT. */
1408 if (inta_fh & CSR39_FH_INT_RX_MASK)
1409 inta |= CSR_INT_BIT_FH_RX;
1410 if (inta_fh & CSR39_FH_INT_TX_MASK)
1411 inta |= CSR_INT_BIT_FH_TX;
1412
1413 /* Now service all interrupt bits discovered above. */
1414 if (inta & CSR_INT_BIT_HW_ERR) {
1415 IL_ERR("Hardware error detected. Restarting.\n");
1416
1417 /* Tell the device to stop sending interrupts */
1418 il_disable_interrupts(il);
1419
1420 il->isr_stats.hw++;
1421 il_irq_handle_error(il);
1422
1423 handled |= CSR_INT_BIT_HW_ERR;
1424
1425 return;
1426 }
1427 #ifdef CONFIG_IWLEGACY_DEBUG
1428 if (il_get_debug_level(il) & (IL_DL_ISR)) {
1429 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1430 if (inta & CSR_INT_BIT_SCD) {
1431 D_ISR("Scheduler finished to transmit "
1432 "the frame/frames.\n");
1433 il->isr_stats.sch++;
1434 }
1435
1436 /* Alive notification via Rx interrupt will do the real work */
1437 if (inta & CSR_INT_BIT_ALIVE) {
1438 D_ISR("Alive interrupt\n");
1439 il->isr_stats.alive++;
1440 }
1441 }
1442 #endif
1443 /* Safely ignore these bits for debug checks below */
1444 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1445
1446 /* Error detected by uCode */
1447 if (inta & CSR_INT_BIT_SW_ERR) {
1448 IL_ERR("Microcode SW error detected. " "Restarting 0x%X.\n",
1449 inta);
1450 il->isr_stats.sw++;
1451 il_irq_handle_error(il);
1452 handled |= CSR_INT_BIT_SW_ERR;
1453 }
1454
1455 /* uCode wakes up after power-down sleep */
1456 if (inta & CSR_INT_BIT_WAKEUP) {
1457 D_ISR("Wakeup interrupt\n");
1458 il_rx_queue_update_write_ptr(il, &il->rxq);
1459
1460 spin_lock_irqsave(&il->lock, flags);
1461 il_txq_update_write_ptr(il, &il->txq[0]);
1462 il_txq_update_write_ptr(il, &il->txq[1]);
1463 il_txq_update_write_ptr(il, &il->txq[2]);
1464 il_txq_update_write_ptr(il, &il->txq[3]);
1465 il_txq_update_write_ptr(il, &il->txq[4]);
1466 spin_unlock_irqrestore(&il->lock, flags);
1467
1468 il->isr_stats.wakeup++;
1469 handled |= CSR_INT_BIT_WAKEUP;
1470 }
1471
1472 /* All uCode command responses, including Tx command responses,
1473 * Rx "responses" (frame-received notification), and other
1474 * notifications from uCode come through here*/
1475 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1476 il3945_rx_handle(il);
1477 il->isr_stats.rx++;
1478 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1479 }
1480
1481 if (inta & CSR_INT_BIT_FH_TX) {
1482 D_ISR("Tx interrupt\n");
1483 il->isr_stats.tx++;
1484
1485 _il_wr(il, CSR_FH_INT_STATUS, (1 << 6));
1486 il_wr(il, FH39_TCSR_CREDIT(FH39_SRVC_CHNL), 0x0);
1487 handled |= CSR_INT_BIT_FH_TX;
1488 }
1489
1490 if (inta & ~handled) {
1491 IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
1492 il->isr_stats.unhandled++;
1493 }
1494
1495 if (inta & ~il->inta_mask) {
1496 IL_WARN("Disabled INTA bits 0x%08x were pending\n",
1497 inta & ~il->inta_mask);
1498 IL_WARN(" with inta_fh = 0x%08x\n", inta_fh);
1499 }
1500
1501 /* Re-enable all interrupts */
1502 /* only Re-enable if disabled by irq */
1503 if (test_bit(S_INT_ENABLED, &il->status))
1504 il_enable_interrupts(il);
1505
1506 #ifdef CONFIG_IWLEGACY_DEBUG
1507 if (il_get_debug_level(il) & (IL_DL_ISR)) {
1508 inta = _il_rd(il, CSR_INT);
1509 inta_mask = _il_rd(il, CSR_INT_MASK);
1510 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
1511 D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1512 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1513 }
1514 #endif
1515 }
1516
1517 static int
1518 il3945_get_channels_for_scan(struct il_priv *il, enum nl80211_band band,
1519 u8 is_active, u8 n_probes,
1520 struct il3945_scan_channel *scan_ch,
1521 struct ieee80211_vif *vif)
1522 {
1523 struct ieee80211_channel *chan;
1524 const struct ieee80211_supported_band *sband;
1525 const struct il_channel_info *ch_info;
1526 u16 passive_dwell = 0;
1527 u16 active_dwell = 0;
1528 int added, i;
1529
1530 sband = il_get_hw_mode(il, band);
1531 if (!sband)
1532 return 0;
1533
1534 active_dwell = il_get_active_dwell_time(il, band, n_probes);
1535 passive_dwell = il_get_passive_dwell_time(il, band, vif);
1536
1537 if (passive_dwell <= active_dwell)
1538 passive_dwell = active_dwell + 1;
1539
1540 for (i = 0, added = 0; i < il->scan_request->n_channels; i++) {
1541 chan = il->scan_request->channels[i];
1542
1543 if (chan->band != band)
1544 continue;
1545
1546 scan_ch->channel = chan->hw_value;
1547
1548 ch_info = il_get_channel_info(il, band, scan_ch->channel);
1549 if (!il_is_channel_valid(ch_info)) {
1550 D_SCAN("Channel %d is INVALID for this band.\n",
1551 scan_ch->channel);
1552 continue;
1553 }
1554
1555 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1556 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1557 /* If passive , set up for auto-switch
1558 * and use long active_dwell time.
1559 */
1560 if (!is_active || il_is_channel_passive(ch_info) ||
1561 (chan->flags & IEEE80211_CHAN_NO_IR)) {
1562 scan_ch->type = 0; /* passive */
1563 if (IL_UCODE_API(il->ucode_ver) == 1)
1564 scan_ch->active_dwell =
1565 cpu_to_le16(passive_dwell - 1);
1566 } else {
1567 scan_ch->type = 1; /* active */
1568 }
1569
1570 /* Set direct probe bits. These may be used both for active
1571 * scan channels (probes gets sent right away),
1572 * or for passive channels (probes get se sent only after
1573 * hearing clear Rx packet).*/
1574 if (IL_UCODE_API(il->ucode_ver) >= 2) {
1575 if (n_probes)
1576 scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
1577 } else {
1578 /* uCode v1 does not allow setting direct probe bits on
1579 * passive channel. */
1580 if ((scan_ch->type & 1) && n_probes)
1581 scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
1582 }
1583
1584 /* Set txpower levels to defaults */
1585 scan_ch->tpc.dsp_atten = 110;
1586 /* scan_pwr_info->tpc.dsp_atten; */
1587
1588 /*scan_pwr_info->tpc.tx_gain; */
1589 if (band == NL80211_BAND_5GHZ)
1590 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1591 else {
1592 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1593 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1594 * power level:
1595 * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1596 */
1597 }
1598
1599 D_SCAN("Scanning %d [%s %d]\n", scan_ch->channel,
1600 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1601 (scan_ch->type & 1) ? active_dwell : passive_dwell);
1602
1603 scan_ch++;
1604 added++;
1605 }
1606
1607 D_SCAN("total channels to scan %d\n", added);
1608 return added;
1609 }
1610
1611 static void
1612 il3945_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates)
1613 {
1614 int i;
1615
1616 for (i = 0; i < RATE_COUNT_LEGACY; i++) {
1617 rates[i].bitrate = il3945_rates[i].ieee * 5;
1618 rates[i].hw_value = i; /* Rate scaling will work on idxes */
1619 rates[i].hw_value_short = i;
1620 rates[i].flags = 0;
1621 if (i > IL39_LAST_OFDM_RATE || i < IL_FIRST_OFDM_RATE) {
1622 /*
1623 * If CCK != 1M then set short preamble rate flag.
1624 */
1625 rates[i].flags |=
1626 (il3945_rates[i].plcp ==
1627 10) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1628 }
1629 }
1630 }
1631
1632 /******************************************************************************
1633 *
1634 * uCode download functions
1635 *
1636 ******************************************************************************/
1637
1638 static void
1639 il3945_dealloc_ucode_pci(struct il_priv *il)
1640 {
1641 il_free_fw_desc(il->pci_dev, &il->ucode_code);
1642 il_free_fw_desc(il->pci_dev, &il->ucode_data);
1643 il_free_fw_desc(il->pci_dev, &il->ucode_data_backup);
1644 il_free_fw_desc(il->pci_dev, &il->ucode_init);
1645 il_free_fw_desc(il->pci_dev, &il->ucode_init_data);
1646 il_free_fw_desc(il->pci_dev, &il->ucode_boot);
1647 }
1648
1649 /*
1650 * il3945_verify_inst_full - verify runtime uCode image in card vs. host,
1651 * looking at all data.
1652 */
1653 static int
1654 il3945_verify_inst_full(struct il_priv *il, __le32 * image, u32 len)
1655 {
1656 u32 val;
1657 u32 save_len = len;
1658 int rc = 0;
1659 u32 errcnt;
1660
1661 D_INFO("ucode inst image size is %u\n", len);
1662
1663 il_wr(il, HBUS_TARG_MEM_RADDR, IL39_RTC_INST_LOWER_BOUND);
1664
1665 errcnt = 0;
1666 for (; len > 0; len -= sizeof(u32), image++) {
1667 /* read data comes through single port, auto-incr addr */
1668 /* NOTE: Use the debugless read so we don't flood kernel log
1669 * if IL_DL_IO is set */
1670 val = _il_rd(il, HBUS_TARG_MEM_RDAT);
1671 if (val != le32_to_cpu(*image)) {
1672 IL_ERR("uCode INST section is invalid at "
1673 "offset 0x%x, is 0x%x, s/b 0x%x\n",
1674 save_len - len, val, le32_to_cpu(*image));
1675 rc = -EIO;
1676 errcnt++;
1677 if (errcnt >= 20)
1678 break;
1679 }
1680 }
1681
1682 if (!errcnt)
1683 D_INFO("ucode image in INSTRUCTION memory is good\n");
1684
1685 return rc;
1686 }
1687
1688 /*
1689 * il3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1690 * using sample data 100 bytes apart. If these sample points are good,
1691 * it's a pretty good bet that everything between them is good, too.
1692 */
1693 static int
1694 il3945_verify_inst_sparse(struct il_priv *il, __le32 * image, u32 len)
1695 {
1696 u32 val;
1697 int rc = 0;
1698 u32 errcnt = 0;
1699 u32 i;
1700
1701 D_INFO("ucode inst image size is %u\n", len);
1702
1703 for (i = 0; i < len; i += 100, image += 100 / sizeof(u32)) {
1704 /* read data comes through single port, auto-incr addr */
1705 /* NOTE: Use the debugless read so we don't flood kernel log
1706 * if IL_DL_IO is set */
1707 il_wr(il, HBUS_TARG_MEM_RADDR, i + IL39_RTC_INST_LOWER_BOUND);
1708 val = _il_rd(il, HBUS_TARG_MEM_RDAT);
1709 if (val != le32_to_cpu(*image)) {
1710 #if 0 /* Enable this if you want to see details */
1711 IL_ERR("uCode INST section is invalid at "
1712 "offset 0x%x, is 0x%x, s/b 0x%x\n", i, val,
1713 *image);
1714 #endif
1715 rc = -EIO;
1716 errcnt++;
1717 if (errcnt >= 3)
1718 break;
1719 }
1720 }
1721
1722 return rc;
1723 }
1724
1725 /*
1726 * il3945_verify_ucode - determine which instruction image is in SRAM,
1727 * and verify its contents
1728 */
1729 static int
1730 il3945_verify_ucode(struct il_priv *il)
1731 {
1732 __le32 *image;
1733 u32 len;
1734 int rc = 0;
1735
1736 /* Try bootstrap */
1737 image = (__le32 *) il->ucode_boot.v_addr;
1738 len = il->ucode_boot.len;
1739 rc = il3945_verify_inst_sparse(il, image, len);
1740 if (rc == 0) {
1741 D_INFO("Bootstrap uCode is good in inst SRAM\n");
1742 return 0;
1743 }
1744
1745 /* Try initialize */
1746 image = (__le32 *) il->ucode_init.v_addr;
1747 len = il->ucode_init.len;
1748 rc = il3945_verify_inst_sparse(il, image, len);
1749 if (rc == 0) {
1750 D_INFO("Initialize uCode is good in inst SRAM\n");
1751 return 0;
1752 }
1753
1754 /* Try runtime/protocol */
1755 image = (__le32 *) il->ucode_code.v_addr;
1756 len = il->ucode_code.len;
1757 rc = il3945_verify_inst_sparse(il, image, len);
1758 if (rc == 0) {
1759 D_INFO("Runtime uCode is good in inst SRAM\n");
1760 return 0;
1761 }
1762
1763 IL_ERR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1764
1765 /* Since nothing seems to match, show first several data entries in
1766 * instruction SRAM, so maybe visual inspection will give a clue.
1767 * Selection of bootstrap image (vs. other images) is arbitrary. */
1768 image = (__le32 *) il->ucode_boot.v_addr;
1769 len = il->ucode_boot.len;
1770 rc = il3945_verify_inst_full(il, image, len);
1771
1772 return rc;
1773 }
1774
1775 static void
1776 il3945_nic_start(struct il_priv *il)
1777 {
1778 /* Remove all resets to allow NIC to operate */
1779 _il_wr(il, CSR_RESET, 0);
1780 }
1781
1782 #define IL3945_UCODE_GET(item) \
1783 static u32 il3945_ucode_get_##item(const struct il_ucode_header *ucode)\
1784 { \
1785 return le32_to_cpu(ucode->v1.item); \
1786 }
1787
1788 static u32
1789 il3945_ucode_get_header_size(u32 api_ver)
1790 {
1791 return 24;
1792 }
1793
1794 static u8 *
1795 il3945_ucode_get_data(const struct il_ucode_header *ucode)
1796 {
1797 return (u8 *) ucode->v1.data;
1798 }
1799
1800 IL3945_UCODE_GET(inst_size);
1801 IL3945_UCODE_GET(data_size);
1802 IL3945_UCODE_GET(init_size);
1803 IL3945_UCODE_GET(init_data_size);
1804 IL3945_UCODE_GET(boot_size);
1805
1806 /*
1807 * il3945_read_ucode - Read uCode images from disk file.
1808 *
1809 * Copy into buffers for card to fetch via bus-mastering
1810 */
1811 static int
1812 il3945_read_ucode(struct il_priv *il)
1813 {
1814 const struct il_ucode_header *ucode;
1815 int ret = -EINVAL, idx;
1816 const struct firmware *ucode_raw;
1817 /* firmware file name contains uCode/driver compatibility version */
1818 const char *name_pre = il->cfg->fw_name_pre;
1819 const unsigned int api_max = il->cfg->ucode_api_max;
1820 const unsigned int api_min = il->cfg->ucode_api_min;
1821 char buf[25];
1822 u8 *src;
1823 size_t len;
1824 u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1825
1826 /* Ask kernel firmware_class module to get the boot firmware off disk.
1827 * request_firmware() is synchronous, file is in memory on return. */
1828 for (idx = api_max; idx >= api_min; idx--) {
1829 sprintf(buf, "%s%u%s", name_pre, idx, ".ucode");
1830 ret = request_firmware(&ucode_raw, buf, &il->pci_dev->dev);
1831 if (ret < 0) {
1832 IL_ERR("%s firmware file req failed: %d\n", buf, ret);
1833 if (ret == -ENOENT)
1834 continue;
1835 else
1836 goto error;
1837 } else {
1838 if (idx < api_max)
1839 IL_ERR("Loaded firmware %s, "
1840 "which is deprecated. "
1841 " Please use API v%u instead.\n", buf,
1842 api_max);
1843 D_INFO("Got firmware '%s' file "
1844 "(%zd bytes) from disk\n", buf, ucode_raw->size);
1845 break;
1846 }
1847 }
1848
1849 if (ret < 0)
1850 goto error;
1851
1852 /* Make sure that we got at least our header! */
1853 if (ucode_raw->size < il3945_ucode_get_header_size(1)) {
1854 IL_ERR("File size way too small!\n");
1855 ret = -EINVAL;
1856 goto err_release;
1857 }
1858
1859 /* Data from ucode file: header followed by uCode images */
1860 ucode = (struct il_ucode_header *)ucode_raw->data;
1861
1862 il->ucode_ver = le32_to_cpu(ucode->ver);
1863 api_ver = IL_UCODE_API(il->ucode_ver);
1864 inst_size = il3945_ucode_get_inst_size(ucode);
1865 data_size = il3945_ucode_get_data_size(ucode);
1866 init_size = il3945_ucode_get_init_size(ucode);
1867 init_data_size = il3945_ucode_get_init_data_size(ucode);
1868 boot_size = il3945_ucode_get_boot_size(ucode);
1869 src = il3945_ucode_get_data(ucode);
1870
1871 /* api_ver should match the api version forming part of the
1872 * firmware filename ... but we don't check for that and only rely
1873 * on the API version read from firmware header from here on forward */
1874
1875 if (api_ver < api_min || api_ver > api_max) {
1876 IL_ERR("Driver unable to support your firmware API. "
1877 "Driver supports v%u, firmware is v%u.\n", api_max,
1878 api_ver);
1879 il->ucode_ver = 0;
1880 ret = -EINVAL;
1881 goto err_release;
1882 }
1883 if (api_ver != api_max)
1884 IL_ERR("Firmware has old API version. Expected %u, "
1885 "got %u. New firmware can be obtained "
1886 "from http://www.intellinuxwireless.org.\n", api_max,
1887 api_ver);
1888
1889 IL_INFO("loaded firmware version %u.%u.%u.%u\n",
1890 IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver),
1891 IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver));
1892
1893 snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version),
1894 "%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver),
1895 IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver),
1896 IL_UCODE_SERIAL(il->ucode_ver));
1897
1898 D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver);
1899 D_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
1900 D_INFO("f/w package hdr runtime data size = %u\n", data_size);
1901 D_INFO("f/w package hdr init inst size = %u\n", init_size);
1902 D_INFO("f/w package hdr init data size = %u\n", init_data_size);
1903 D_INFO("f/w package hdr boot inst size = %u\n", boot_size);
1904
1905 /* Verify size of file vs. image size info in file's header */
1906 if (ucode_raw->size !=
1907 il3945_ucode_get_header_size(api_ver) + inst_size + data_size +
1908 init_size + init_data_size + boot_size) {
1909
1910 D_INFO("uCode file size %zd does not match expected size\n",
1911 ucode_raw->size);
1912 ret = -EINVAL;
1913 goto err_release;
1914 }
1915
1916 /* Verify that uCode images will fit in card's SRAM */
1917 if (inst_size > IL39_MAX_INST_SIZE) {
1918 D_INFO("uCode instr len %d too large to fit in\n", inst_size);
1919 ret = -EINVAL;
1920 goto err_release;
1921 }
1922
1923 if (data_size > IL39_MAX_DATA_SIZE) {
1924 D_INFO("uCode data len %d too large to fit in\n", data_size);
1925 ret = -EINVAL;
1926 goto err_release;
1927 }
1928 if (init_size > IL39_MAX_INST_SIZE) {
1929 D_INFO("uCode init instr len %d too large to fit in\n",
1930 init_size);
1931 ret = -EINVAL;
1932 goto err_release;
1933 }
1934 if (init_data_size > IL39_MAX_DATA_SIZE) {
1935 D_INFO("uCode init data len %d too large to fit in\n",
1936 init_data_size);
1937 ret = -EINVAL;
1938 goto err_release;
1939 }
1940 if (boot_size > IL39_MAX_BSM_SIZE) {
1941 D_INFO("uCode boot instr len %d too large to fit in\n",
1942 boot_size);
1943 ret = -EINVAL;
1944 goto err_release;
1945 }
1946
1947 /* Allocate ucode buffers for card's bus-master loading ... */
1948
1949 /* Runtime instructions and 2 copies of data:
1950 * 1) unmodified from disk
1951 * 2) backup cache for save/restore during power-downs */
1952 il->ucode_code.len = inst_size;
1953 il_alloc_fw_desc(il->pci_dev, &il->ucode_code);
1954
1955 il->ucode_data.len = data_size;
1956 il_alloc_fw_desc(il->pci_dev, &il->ucode_data);
1957
1958 il->ucode_data_backup.len = data_size;
1959 il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup);
1960
1961 if (!il->ucode_code.v_addr || !il->ucode_data.v_addr ||
1962 !il->ucode_data_backup.v_addr)
1963 goto err_pci_alloc;
1964
1965 /* Initialization instructions and data */
1966 if (init_size && init_data_size) {
1967 il->ucode_init.len = init_size;
1968 il_alloc_fw_desc(il->pci_dev, &il->ucode_init);
1969
1970 il->ucode_init_data.len = init_data_size;
1971 il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data);
1972
1973 if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr)
1974 goto err_pci_alloc;
1975 }
1976
1977 /* Bootstrap (instructions only, no data) */
1978 if (boot_size) {
1979 il->ucode_boot.len = boot_size;
1980 il_alloc_fw_desc(il->pci_dev, &il->ucode_boot);
1981
1982 if (!il->ucode_boot.v_addr)
1983 goto err_pci_alloc;
1984 }
1985
1986 /* Copy images into buffers for card's bus-master reads ... */
1987
1988 /* Runtime instructions (first block of data in file) */
1989 len = inst_size;
1990 D_INFO("Copying (but not loading) uCode instr len %zd\n", len);
1991 memcpy(il->ucode_code.v_addr, src, len);
1992 src += len;
1993
1994 D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1995 il->ucode_code.v_addr, (u32) il->ucode_code.p_addr);
1996
1997 /* Runtime data (2nd block)
1998 * NOTE: Copy into backup buffer will be done in il3945_up() */
1999 len = data_size;
2000 D_INFO("Copying (but not loading) uCode data len %zd\n", len);
2001 memcpy(il->ucode_data.v_addr, src, len);
2002 memcpy(il->ucode_data_backup.v_addr, src, len);
2003 src += len;
2004
2005 /* Initialization instructions (3rd block) */
2006 if (init_size) {
2007 len = init_size;
2008 D_INFO("Copying (but not loading) init instr len %zd\n", len);
2009 memcpy(il->ucode_init.v_addr, src, len);
2010 src += len;
2011 }
2012
2013 /* Initialization data (4th block) */
2014 if (init_data_size) {
2015 len = init_data_size;
2016 D_INFO("Copying (but not loading) init data len %zd\n", len);
2017 memcpy(il->ucode_init_data.v_addr, src, len);
2018 src += len;
2019 }
2020
2021 /* Bootstrap instructions (5th block) */
2022 len = boot_size;
2023 D_INFO("Copying (but not loading) boot instr len %zd\n", len);
2024 memcpy(il->ucode_boot.v_addr, src, len);
2025
2026 /* We have our copies now, allow OS release its copies */
2027 release_firmware(ucode_raw);
2028 return 0;
2029
2030 err_pci_alloc:
2031 IL_ERR("failed to allocate pci memory\n");
2032 ret = -ENOMEM;
2033 il3945_dealloc_ucode_pci(il);
2034
2035 err_release:
2036 release_firmware(ucode_raw);
2037
2038 error:
2039 return ret;
2040 }
2041
2042 /*
2043 * il3945_set_ucode_ptrs - Set uCode address location
2044 *
2045 * Tell initialization uCode where to find runtime uCode.
2046 *
2047 * BSM registers initially contain pointers to initialization uCode.
2048 * We need to replace them to load runtime uCode inst and data,
2049 * and to save runtime data when powering down.
2050 */
2051 static int
2052 il3945_set_ucode_ptrs(struct il_priv *il)
2053 {
2054 dma_addr_t pinst;
2055 dma_addr_t pdata;
2056
2057 /* bits 31:0 for 3945 */
2058 pinst = il->ucode_code.p_addr;
2059 pdata = il->ucode_data_backup.p_addr;
2060
2061 /* Tell bootstrap uCode where to find image to load */
2062 il_wr_prph(il, BSM_DRAM_INST_PTR_REG, pinst);
2063 il_wr_prph(il, BSM_DRAM_DATA_PTR_REG, pdata);
2064 il_wr_prph(il, BSM_DRAM_DATA_BYTECOUNT_REG, il->ucode_data.len);
2065
2066 /* Inst byte count must be last to set up, bit 31 signals uCode
2067 * that all new ptr/size info is in place */
2068 il_wr_prph(il, BSM_DRAM_INST_BYTECOUNT_REG,
2069 il->ucode_code.len | BSM_DRAM_INST_LOAD);
2070
2071 D_INFO("Runtime uCode pointers are set.\n");
2072
2073 return 0;
2074 }
2075
2076 /*
2077 * il3945_init_alive_start - Called after N_ALIVE notification received
2078 *
2079 * Called after N_ALIVE notification received from "initialize" uCode.
2080 *
2081 * Tell "initialize" uCode to go ahead and load the runtime uCode.
2082 */
2083 static void
2084 il3945_init_alive_start(struct il_priv *il)
2085 {
2086 /* Check alive response for "valid" sign from uCode */
2087 if (il->card_alive_init.is_valid != UCODE_VALID_OK) {
2088 /* We had an error bringing up the hardware, so take it
2089 * all the way back down so we can try again */
2090 D_INFO("Initialize Alive failed.\n");
2091 goto restart;
2092 }
2093
2094 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2095 * This is a paranoid check, because we would not have gotten the
2096 * "initialize" alive if code weren't properly loaded. */
2097 if (il3945_verify_ucode(il)) {
2098 /* Runtime instruction load was bad;
2099 * take it all the way back down so we can try again */
2100 D_INFO("Bad \"initialize\" uCode load.\n");
2101 goto restart;
2102 }
2103
2104 /* Send pointers to protocol/runtime uCode image ... init code will
2105 * load and launch runtime uCode, which will send us another "Alive"
2106 * notification. */
2107 D_INFO("Initialization Alive received.\n");
2108 if (il3945_set_ucode_ptrs(il)) {
2109 /* Runtime instruction load won't happen;
2110 * take it all the way back down so we can try again */
2111 D_INFO("Couldn't set up uCode pointers.\n");
2112 goto restart;
2113 }
2114 return;
2115
2116 restart:
2117 queue_work(il->workqueue, &il->restart);
2118 }
2119
2120 /*
2121 * il3945_alive_start - called after N_ALIVE notification received
2122 * from protocol/runtime uCode (initialization uCode's
2123 * Alive gets handled by il3945_init_alive_start()).
2124 */
2125 static void
2126 il3945_alive_start(struct il_priv *il)
2127 {
2128 int thermal_spin = 0;
2129 u32 rfkill;
2130
2131 D_INFO("Runtime Alive received.\n");
2132
2133 if (il->card_alive.is_valid != UCODE_VALID_OK) {
2134 /* We had an error bringing up the hardware, so take it
2135 * all the way back down so we can try again */
2136 D_INFO("Alive failed.\n");
2137 goto restart;
2138 }
2139
2140 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2141 * This is a paranoid check, because we would not have gotten the
2142 * "runtime" alive if code weren't properly loaded. */
2143 if (il3945_verify_ucode(il)) {
2144 /* Runtime instruction load was bad;
2145 * take it all the way back down so we can try again */
2146 D_INFO("Bad runtime uCode load.\n");
2147 goto restart;
2148 }
2149
2150 rfkill = il_rd_prph(il, APMG_RFKILL_REG);
2151 D_INFO("RFKILL status: 0x%x\n", rfkill);
2152
2153 if (rfkill & 0x1) {
2154 clear_bit(S_RFKILL, &il->status);
2155 /* if RFKILL is not on, then wait for thermal
2156 * sensor in adapter to kick in */
2157 while (il3945_hw_get_temperature(il) == 0) {
2158 thermal_spin++;
2159 udelay(10);
2160 }
2161
2162 if (thermal_spin)
2163 D_INFO("Thermal calibration took %dus\n",
2164 thermal_spin * 10);
2165 } else
2166 set_bit(S_RFKILL, &il->status);
2167
2168 /* After the ALIVE response, we can send commands to 3945 uCode */
2169 set_bit(S_ALIVE, &il->status);
2170
2171 /* Enable watchdog to monitor the driver tx queues */
2172 il_setup_watchdog(il);
2173
2174 if (il_is_rfkill(il))
2175 return;
2176
2177 ieee80211_wake_queues(il->hw);
2178
2179 il->active_rate = RATES_MASK_3945;
2180
2181 il_power_update_mode(il, true);
2182
2183 if (il_is_associated(il)) {
2184 struct il3945_rxon_cmd *active_rxon =
2185 (struct il3945_rxon_cmd *)(&il->active);
2186
2187 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2188 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2189 } else {
2190 /* Initialize our rx_config data */
2191 il_connection_init_rx_config(il);
2192 }
2193
2194 /* Configure Bluetooth device coexistence support */
2195 il_send_bt_config(il);
2196
2197 set_bit(S_READY, &il->status);
2198
2199 /* Configure the adapter for unassociated operation */
2200 il3945_commit_rxon(il);
2201
2202 il3945_reg_txpower_periodic(il);
2203
2204 D_INFO("ALIVE processing complete.\n");
2205 wake_up(&il->wait_command_queue);
2206
2207 return;
2208
2209 restart:
2210 queue_work(il->workqueue, &il->restart);
2211 }
2212
2213 static void il3945_cancel_deferred_work(struct il_priv *il);
2214
2215 static void
2216 __il3945_down(struct il_priv *il)
2217 {
2218 unsigned long flags;
2219 int exit_pending;
2220
2221 D_INFO(DRV_NAME " is going down\n");
2222
2223 il_scan_cancel_timeout(il, 200);
2224
2225 exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status);
2226
2227 /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set
2228 * to prevent rearm timer */
2229 del_timer_sync(&il->watchdog);
2230
2231 /* Station information will now be cleared in device */
2232 il_clear_ucode_stations(il);
2233 il_dealloc_bcast_stations(il);
2234 il_clear_driver_stations(il);
2235
2236 /* Unblock any waiting calls */
2237 wake_up_all(&il->wait_command_queue);
2238
2239 /* Wipe out the EXIT_PENDING status bit if we are not actually
2240 * exiting the module */
2241 if (!exit_pending)
2242 clear_bit(S_EXIT_PENDING, &il->status);
2243
2244 /* stop and reset the on-board processor */
2245 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2246
2247 /* tell the device to stop sending interrupts */
2248 spin_lock_irqsave(&il->lock, flags);
2249 il_disable_interrupts(il);
2250 spin_unlock_irqrestore(&il->lock, flags);
2251 il3945_synchronize_irq(il);
2252
2253 if (il->mac80211_registered)
2254 ieee80211_stop_queues(il->hw);
2255
2256 /* If we have not previously called il3945_init() then
2257 * clear all bits but the RF Kill bits and return */
2258 if (!il_is_init(il)) {
2259 il->status =
2260 test_bit(S_RFKILL, &il->status) << S_RFKILL |
2261 test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
2262 test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
2263 goto exit;
2264 }
2265
2266 /* ...otherwise clear out all the status bits but the RF Kill
2267 * bit and continue taking the NIC down. */
2268 il->status &=
2269 test_bit(S_RFKILL, &il->status) << S_RFKILL |
2270 test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
2271 test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR |
2272 test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
2273
2274 /*
2275 * We disabled and synchronized interrupt, and priv->mutex is taken, so
2276 * here is the only thread which will program device registers, but
2277 * still have lockdep assertions, so we are taking reg_lock.
2278 */
2279 spin_lock_irq(&il->reg_lock);
2280 /* FIXME: il_grab_nic_access if rfkill is off ? */
2281
2282 il3945_hw_txq_ctx_stop(il);
2283 il3945_hw_rxq_stop(il);
2284 /* Power-down device's busmaster DMA clocks */
2285 _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2286 udelay(5);
2287 /* Stop the device, and put it in low power state */
2288 _il_apm_stop(il);
2289
2290 spin_unlock_irq(&il->reg_lock);
2291
2292 il3945_hw_txq_ctx_free(il);
2293 exit:
2294 memset(&il->card_alive, 0, sizeof(struct il_alive_resp));
2295 dev_kfree_skb(il->beacon_skb);
2296 il->beacon_skb = NULL;
2297
2298 /* clear out any free frames */
2299 il3945_clear_free_frames(il);
2300 }
2301
2302 static void
2303 il3945_down(struct il_priv *il)
2304 {
2305 mutex_lock(&il->mutex);
2306 __il3945_down(il);
2307 mutex_unlock(&il->mutex);
2308
2309 il3945_cancel_deferred_work(il);
2310 }
2311
2312 #define MAX_HW_RESTARTS 5
2313
2314 static int
2315 il3945_alloc_bcast_station(struct il_priv *il)
2316 {
2317 unsigned long flags;
2318 u8 sta_id;
2319
2320 spin_lock_irqsave(&il->sta_lock, flags);
2321 sta_id = il_prep_station(il, il_bcast_addr, false, NULL);
2322 if (sta_id == IL_INVALID_STATION) {
2323 IL_ERR("Unable to prepare broadcast station\n");
2324 spin_unlock_irqrestore(&il->sta_lock, flags);
2325
2326 return -EINVAL;
2327 }
2328
2329 il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE;
2330 il->stations[sta_id].used |= IL_STA_BCAST;
2331 spin_unlock_irqrestore(&il->sta_lock, flags);
2332
2333 return 0;
2334 }
2335
2336 static int
2337 __il3945_up(struct il_priv *il)
2338 {
2339 int rc, i;
2340
2341 rc = il3945_alloc_bcast_station(il);
2342 if (rc)
2343 return rc;
2344
2345 if (test_bit(S_EXIT_PENDING, &il->status)) {
2346 IL_WARN("Exit pending; will not bring the NIC up\n");
2347 return -EIO;
2348 }
2349
2350 if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) {
2351 IL_ERR("ucode not available for device bring up\n");
2352 return -EIO;
2353 }
2354
2355 /* If platform's RF_KILL switch is NOT set to KILL */
2356 if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2357 clear_bit(S_RFKILL, &il->status);
2358 else {
2359 set_bit(S_RFKILL, &il->status);
2360 return -ERFKILL;
2361 }
2362
2363 _il_wr(il, CSR_INT, 0xFFFFFFFF);
2364
2365 rc = il3945_hw_nic_init(il);
2366 if (rc) {
2367 IL_ERR("Unable to int nic\n");
2368 return rc;
2369 }
2370
2371 /* make sure rfkill handshake bits are cleared */
2372 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2373 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2374
2375 /* clear (again), then enable host interrupts */
2376 _il_wr(il, CSR_INT, 0xFFFFFFFF);
2377 il_enable_interrupts(il);
2378
2379 /* really make sure rfkill handshake bits are cleared */
2380 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2381 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2382
2383 /* Copy original ucode data image from disk into backup cache.
2384 * This will be used to initialize the on-board processor's
2385 * data SRAM for a clean start when the runtime program first loads. */
2386 memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr,
2387 il->ucode_data.len);
2388
2389 /* We return success when we resume from suspend and rf_kill is on. */
2390 if (test_bit(S_RFKILL, &il->status))
2391 return 0;
2392
2393 for (i = 0; i < MAX_HW_RESTARTS; i++) {
2394
2395 /* load bootstrap state machine,
2396 * load bootstrap program into processor's memory,
2397 * prepare to load the "initialize" uCode */
2398 rc = il->ops->load_ucode(il);
2399
2400 if (rc) {
2401 IL_ERR("Unable to set up bootstrap uCode: %d\n", rc);
2402 continue;
2403 }
2404
2405 /* start card; "initialize" will load runtime ucode */
2406 il3945_nic_start(il);
2407
2408 D_INFO(DRV_NAME " is coming up\n");
2409
2410 return 0;
2411 }
2412
2413 set_bit(S_EXIT_PENDING, &il->status);
2414 __il3945_down(il);
2415 clear_bit(S_EXIT_PENDING, &il->status);
2416
2417 /* tried to restart and config the device for as long as our
2418 * patience could withstand */
2419 IL_ERR("Unable to initialize device after %d attempts.\n", i);
2420 return -EIO;
2421 }
2422
2423 /*****************************************************************************
2424 *
2425 * Workqueue callbacks
2426 *
2427 *****************************************************************************/
2428
2429 static void
2430 il3945_bg_init_alive_start(struct work_struct *data)
2431 {
2432 struct il_priv *il =
2433 container_of(data, struct il_priv, init_alive_start.work);
2434
2435 mutex_lock(&il->mutex);
2436 if (test_bit(S_EXIT_PENDING, &il->status))
2437 goto out;
2438
2439 il3945_init_alive_start(il);
2440 out:
2441 mutex_unlock(&il->mutex);
2442 }
2443
2444 static void
2445 il3945_bg_alive_start(struct work_struct *data)
2446 {
2447 struct il_priv *il =
2448 container_of(data, struct il_priv, alive_start.work);
2449
2450 mutex_lock(&il->mutex);
2451 if (test_bit(S_EXIT_PENDING, &il->status) || il->txq == NULL)
2452 goto out;
2453
2454 il3945_alive_start(il);
2455 out:
2456 mutex_unlock(&il->mutex);
2457 }
2458
2459 /*
2460 * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2461 * driver must poll CSR_GP_CNTRL_REG register for change. This register
2462 * *is* readable even when device has been SW_RESET into low power mode
2463 * (e.g. during RF KILL).
2464 */
2465 static void
2466 il3945_rfkill_poll(struct work_struct *data)
2467 {
2468 struct il_priv *il =
2469 container_of(data, struct il_priv, _3945.rfkill_poll.work);
2470 bool old_rfkill = test_bit(S_RFKILL, &il->status);
2471 bool new_rfkill =
2472 !(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2473
2474 if (new_rfkill != old_rfkill) {
2475 if (new_rfkill)
2476 set_bit(S_RFKILL, &il->status);
2477 else
2478 clear_bit(S_RFKILL, &il->status);
2479
2480 wiphy_rfkill_set_hw_state(il->hw->wiphy, new_rfkill);
2481
2482 D_RF_KILL("RF_KILL bit toggled to %s.\n",
2483 new_rfkill ? "disable radio" : "enable radio");
2484 }
2485
2486 /* Keep this running, even if radio now enabled. This will be
2487 * cancelled in mac_start() if system decides to start again */
2488 queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
2489 round_jiffies_relative(2 * HZ));
2490
2491 }
2492
2493 int
2494 il3945_request_scan(struct il_priv *il, struct ieee80211_vif *vif)
2495 {
2496 struct il_host_cmd cmd = {
2497 .id = C_SCAN,
2498 .len = sizeof(struct il3945_scan_cmd),
2499 .flags = CMD_SIZE_HUGE,
2500 };
2501 struct il3945_scan_cmd *scan;
2502 u8 n_probes = 0;
2503 enum nl80211_band band;
2504 bool is_active = false;
2505 int ret;
2506 u16 len;
2507
2508 lockdep_assert_held(&il->mutex);
2509
2510 if (!il->scan_cmd) {
2511 il->scan_cmd =
2512 kmalloc(sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE,
2513 GFP_KERNEL);
2514 if (!il->scan_cmd) {
2515 D_SCAN("Fail to allocate scan memory\n");
2516 return -ENOMEM;
2517 }
2518 }
2519 scan = il->scan_cmd;
2520 memset(scan, 0, sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE);
2521
2522 scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH;
2523 scan->quiet_time = IL_ACTIVE_QUIET_TIME;
2524
2525 if (il_is_associated(il)) {
2526 u16 interval;
2527 u32 extra;
2528 u32 suspend_time = 100;
2529 u32 scan_suspend_time = 100;
2530
2531 D_INFO("Scanning while associated...\n");
2532
2533 interval = vif->bss_conf.beacon_int;
2534
2535 scan->suspend_time = 0;
2536 scan->max_out_time = cpu_to_le32(200 * 1024);
2537 if (!interval)
2538 interval = suspend_time;
2539 /*
2540 * suspend time format:
2541 * 0-19: beacon interval in usec (time before exec.)
2542 * 20-23: 0
2543 * 24-31: number of beacons (suspend between channels)
2544 */
2545
2546 extra = (suspend_time / interval) << 24;
2547 scan_suspend_time =
2548 0xFF0FFFFF & (extra | ((suspend_time % interval) * 1024));
2549
2550 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2551 D_SCAN("suspend_time 0x%X beacon interval %d\n",
2552 scan_suspend_time, interval);
2553 }
2554
2555 if (il->scan_request->n_ssids) {
2556 int i, p = 0;
2557 D_SCAN("Kicking off active scan\n");
2558 for (i = 0; i < il->scan_request->n_ssids; i++) {
2559 /* always does wildcard anyway */
2560 if (!il->scan_request->ssids[i].ssid_len)
2561 continue;
2562 scan->direct_scan[p].id = WLAN_EID_SSID;
2563 scan->direct_scan[p].len =
2564 il->scan_request->ssids[i].ssid_len;
2565 memcpy(scan->direct_scan[p].ssid,
2566 il->scan_request->ssids[i].ssid,
2567 il->scan_request->ssids[i].ssid_len);
2568 n_probes++;
2569 p++;
2570 }
2571 is_active = true;
2572 } else
2573 D_SCAN("Kicking off passive scan.\n");
2574
2575 /* We don't build a direct scan probe request; the uCode will do
2576 * that based on the direct_mask added to each channel entry */
2577 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2578 scan->tx_cmd.sta_id = il->hw_params.bcast_id;
2579 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2580
2581 /* flags + rate selection */
2582
2583 switch (il->scan_band) {
2584 case NL80211_BAND_2GHZ:
2585 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2586 scan->tx_cmd.rate = RATE_1M_PLCP;
2587 band = NL80211_BAND_2GHZ;
2588 break;
2589 case NL80211_BAND_5GHZ:
2590 scan->tx_cmd.rate = RATE_6M_PLCP;
2591 band = NL80211_BAND_5GHZ;
2592 break;
2593 default:
2594 IL_WARN("Invalid scan band\n");
2595 return -EIO;
2596 }
2597
2598 /*
2599 * If active scaning is requested but a certain channel is marked
2600 * passive, we can do active scanning if we detect transmissions. For
2601 * passive only scanning disable switching to active on any channel.
2602 */
2603 scan->good_CRC_th =
2604 is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER;
2605
2606 len =
2607 il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data,
2608 vif->addr, il->scan_request->ie,
2609 il->scan_request->ie_len,
2610 IL_MAX_SCAN_SIZE - sizeof(*scan));
2611 scan->tx_cmd.len = cpu_to_le16(len);
2612
2613 /* select Rx antennas */
2614 scan->flags |= il3945_get_antenna_flags(il);
2615
2616 scan->channel_count =
2617 il3945_get_channels_for_scan(il, band, is_active, n_probes,
2618 (void *)&scan->data[len], vif);
2619 if (scan->channel_count == 0) {
2620 D_SCAN("channel count %d\n", scan->channel_count);
2621 return -EIO;
2622 }
2623
2624 cmd.len +=
2625 le16_to_cpu(scan->tx_cmd.len) +
2626 scan->channel_count * sizeof(struct il3945_scan_channel);
2627 cmd.data = scan;
2628 scan->len = cpu_to_le16(cmd.len);
2629
2630 set_bit(S_SCAN_HW, &il->status);
2631 ret = il_send_cmd_sync(il, &cmd);
2632 if (ret)
2633 clear_bit(S_SCAN_HW, &il->status);
2634 return ret;
2635 }
2636
2637 void
2638 il3945_post_scan(struct il_priv *il)
2639 {
2640 /*
2641 * Since setting the RXON may have been deferred while
2642 * performing the scan, fire one off if needed
2643 */
2644 if (memcmp(&il->staging, &il->active, sizeof(il->staging)))
2645 il3945_commit_rxon(il);
2646 }
2647
2648 static void
2649 il3945_bg_restart(struct work_struct *data)
2650 {
2651 struct il_priv *il = container_of(data, struct il_priv, restart);
2652
2653 if (test_bit(S_EXIT_PENDING, &il->status))
2654 return;
2655
2656 if (test_and_clear_bit(S_FW_ERROR, &il->status)) {
2657 mutex_lock(&il->mutex);
2658 il->is_open = 0;
2659 mutex_unlock(&il->mutex);
2660 il3945_down(il);
2661 ieee80211_restart_hw(il->hw);
2662 } else {
2663 il3945_down(il);
2664
2665 mutex_lock(&il->mutex);
2666 if (test_bit(S_EXIT_PENDING, &il->status)) {
2667 mutex_unlock(&il->mutex);
2668 return;
2669 }
2670
2671 __il3945_up(il);
2672 mutex_unlock(&il->mutex);
2673 }
2674 }
2675
2676 static void
2677 il3945_bg_rx_replenish(struct work_struct *data)
2678 {
2679 struct il_priv *il = container_of(data, struct il_priv, rx_replenish);
2680
2681 mutex_lock(&il->mutex);
2682 if (test_bit(S_EXIT_PENDING, &il->status))
2683 goto out;
2684
2685 il3945_rx_replenish(il);
2686 out:
2687 mutex_unlock(&il->mutex);
2688 }
2689
2690 void
2691 il3945_post_associate(struct il_priv *il)
2692 {
2693 int rc = 0;
2694
2695 if (!il->vif || !il->is_open)
2696 return;
2697
2698 D_ASSOC("Associated as %d to: %pM\n", il->vif->cfg.aid,
2699 il->active.bssid_addr);
2700
2701 if (test_bit(S_EXIT_PENDING, &il->status))
2702 return;
2703
2704 il_scan_cancel_timeout(il, 200);
2705
2706 il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2707 il3945_commit_rxon(il);
2708
2709 rc = il_send_rxon_timing(il);
2710 if (rc)
2711 IL_WARN("C_RXON_TIMING failed - " "Attempting to continue.\n");
2712
2713 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2714
2715 il->staging.assoc_id = cpu_to_le16(il->vif->cfg.aid);
2716
2717 D_ASSOC("assoc id %d beacon interval %d\n", il->vif->cfg.aid,
2718 il->vif->bss_conf.beacon_int);
2719
2720 if (il->vif->bss_conf.use_short_preamble)
2721 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2722 else
2723 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2724
2725 if (il->staging.flags & RXON_FLG_BAND_24G_MSK) {
2726 if (il->vif->bss_conf.use_short_slot)
2727 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
2728 else
2729 il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2730 }
2731
2732 il3945_commit_rxon(il);
2733
2734 switch (il->vif->type) {
2735 case NL80211_IFTYPE_STATION:
2736 il3945_rate_scale_init(il->hw, IL_AP_ID);
2737 break;
2738 case NL80211_IFTYPE_ADHOC:
2739 il3945_send_beacon_cmd(il);
2740 break;
2741 default:
2742 IL_ERR("%s Should not be called in %d mode\n", __func__,
2743 il->vif->type);
2744 break;
2745 }
2746 }
2747
2748 /*****************************************************************************
2749 *
2750 * mac80211 entry point functions
2751 *
2752 *****************************************************************************/
2753
2754 #define UCODE_READY_TIMEOUT (2 * HZ)
2755
2756 static int
2757 il3945_mac_start(struct ieee80211_hw *hw)
2758 {
2759 struct il_priv *il = hw->priv;
2760 int ret;
2761
2762 /* we should be verifying the device is ready to be opened */
2763 mutex_lock(&il->mutex);
2764 D_MAC80211("enter\n");
2765
2766 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2767 * ucode filename and max sizes are card-specific. */
2768
2769 if (!il->ucode_code.len) {
2770 ret = il3945_read_ucode(il);
2771 if (ret) {
2772 IL_ERR("Could not read microcode: %d\n", ret);
2773 mutex_unlock(&il->mutex);
2774 goto out_release_irq;
2775 }
2776 }
2777
2778 ret = __il3945_up(il);
2779
2780 mutex_unlock(&il->mutex);
2781
2782 if (ret)
2783 goto out_release_irq;
2784
2785 D_INFO("Start UP work.\n");
2786
2787 /* Wait for START_ALIVE from ucode. Otherwise callbacks from
2788 * mac80211 will not be run successfully. */
2789 ret = wait_event_timeout(il->wait_command_queue,
2790 test_bit(S_READY, &il->status),
2791 UCODE_READY_TIMEOUT);
2792 if (!ret) {
2793 if (!test_bit(S_READY, &il->status)) {
2794 IL_ERR("Wait for START_ALIVE timeout after %dms.\n",
2795 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2796 ret = -ETIMEDOUT;
2797 goto out_release_irq;
2798 }
2799 }
2800
2801 /* ucode is running and will send rfkill notifications,
2802 * no need to poll the killswitch state anymore */
2803 cancel_delayed_work(&il->_3945.rfkill_poll);
2804
2805 il->is_open = 1;
2806 D_MAC80211("leave\n");
2807 return 0;
2808
2809 out_release_irq:
2810 il->is_open = 0;
2811 D_MAC80211("leave - failed\n");
2812 return ret;
2813 }
2814
2815 static void
2816 il3945_mac_stop(struct ieee80211_hw *hw, bool suspend)
2817 {
2818 struct il_priv *il = hw->priv;
2819
2820 D_MAC80211("enter\n");
2821
2822 if (!il->is_open) {
2823 D_MAC80211("leave - skip\n");
2824 return;
2825 }
2826
2827 il->is_open = 0;
2828
2829 il3945_down(il);
2830
2831 flush_workqueue(il->workqueue);
2832
2833 /* start polling the killswitch state again */
2834 queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
2835 round_jiffies_relative(2 * HZ));
2836
2837 D_MAC80211("leave\n");
2838 }
2839
2840 static void
2841 il3945_mac_tx(struct ieee80211_hw *hw,
2842 struct ieee80211_tx_control *control,
2843 struct sk_buff *skb)
2844 {
2845 struct il_priv *il = hw->priv;
2846
2847 D_MAC80211("enter\n");
2848
2849 D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2850 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2851
2852 if (il3945_tx_skb(il, control->sta, skb))
2853 dev_kfree_skb_any(skb);
2854
2855 D_MAC80211("leave\n");
2856 }
2857
2858 void
2859 il3945_config_ap(struct il_priv *il)
2860 {
2861 struct ieee80211_vif *vif = il->vif;
2862 int rc = 0;
2863
2864 if (test_bit(S_EXIT_PENDING, &il->status))
2865 return;
2866
2867 /* The following should be done only at AP bring up */
2868 if (!(il_is_associated(il))) {
2869
2870 /* RXON - unassoc (to set timing command) */
2871 il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2872 il3945_commit_rxon(il);
2873
2874 /* RXON Timing */
2875 rc = il_send_rxon_timing(il);
2876 if (rc)
2877 IL_WARN("C_RXON_TIMING failed - "
2878 "Attempting to continue.\n");
2879
2880 il->staging.assoc_id = 0;
2881
2882 if (vif->bss_conf.use_short_preamble)
2883 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2884 else
2885 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2886
2887 if (il->staging.flags & RXON_FLG_BAND_24G_MSK) {
2888 if (vif->bss_conf.use_short_slot)
2889 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
2890 else
2891 il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2892 }
2893 /* restore RXON assoc */
2894 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2895 il3945_commit_rxon(il);
2896 }
2897 il3945_send_beacon_cmd(il);
2898 }
2899
2900 static int
2901 il3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2902 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
2903 struct ieee80211_key_conf *key)
2904 {
2905 struct il_priv *il = hw->priv;
2906 int ret = 0;
2907 u8 sta_id = IL_INVALID_STATION;
2908 u8 static_key;
2909
2910 D_MAC80211("enter\n");
2911
2912 if (il3945_mod_params.sw_crypto) {
2913 D_MAC80211("leave - hwcrypto disabled\n");
2914 return -EOPNOTSUPP;
2915 }
2916
2917 /*
2918 * To support IBSS RSN, don't program group keys in IBSS, the
2919 * hardware will then not attempt to decrypt the frames.
2920 */
2921 if (vif->type == NL80211_IFTYPE_ADHOC &&
2922 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
2923 D_MAC80211("leave - IBSS RSN\n");
2924 return -EOPNOTSUPP;
2925 }
2926
2927 static_key = !il_is_associated(il);
2928
2929 if (!static_key) {
2930 sta_id = il_sta_id_or_broadcast(il, sta);
2931 if (sta_id == IL_INVALID_STATION) {
2932 D_MAC80211("leave - station not found\n");
2933 return -EINVAL;
2934 }
2935 }
2936
2937 mutex_lock(&il->mutex);
2938 il_scan_cancel_timeout(il, 100);
2939
2940 switch (cmd) {
2941 case SET_KEY:
2942 if (static_key)
2943 ret = il3945_set_static_key(il, key);
2944 else
2945 ret = il3945_set_dynamic_key(il, key, sta_id);
2946 D_MAC80211("enable hwcrypto key\n");
2947 break;
2948 case DISABLE_KEY:
2949 if (static_key)
2950 ret = il3945_remove_static_key(il);
2951 else
2952 ret = il3945_clear_sta_key_info(il, sta_id);
2953 D_MAC80211("disable hwcrypto key\n");
2954 break;
2955 default:
2956 ret = -EINVAL;
2957 }
2958
2959 D_MAC80211("leave ret %d\n", ret);
2960 mutex_unlock(&il->mutex);
2961
2962 return ret;
2963 }
2964
2965 static int
2966 il3945_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2967 struct ieee80211_sta *sta)
2968 {
2969 struct il_priv *il = hw->priv;
2970 struct il3945_sta_priv *sta_priv = (void *)sta->drv_priv;
2971 int ret;
2972 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
2973 u8 sta_id;
2974
2975 mutex_lock(&il->mutex);
2976 D_INFO("station %pM\n", sta->addr);
2977 sta_priv->common.sta_id = IL_INVALID_STATION;
2978
2979 ret = il_add_station_common(il, sta->addr, is_ap, sta, &sta_id);
2980 if (ret) {
2981 IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret);
2982 /* Should we return success if return code is EEXIST ? */
2983 mutex_unlock(&il->mutex);
2984 return ret;
2985 }
2986
2987 sta_priv->common.sta_id = sta_id;
2988
2989 /* Initialize rate scaling */
2990 D_INFO("Initializing rate scaling for station %pM\n", sta->addr);
2991 il3945_rs_rate_init(il, sta, sta_id);
2992 mutex_unlock(&il->mutex);
2993
2994 return 0;
2995 }
2996
2997 static void
2998 il3945_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
2999 unsigned int *total_flags, u64 multicast)
3000 {
3001 struct il_priv *il = hw->priv;
3002 __le32 filter_or = 0, filter_nand = 0;
3003
3004 #define CHK(test, flag) do { \
3005 if (*total_flags & (test)) \
3006 filter_or |= (flag); \
3007 else \
3008 filter_nand |= (flag); \
3009 } while (0)
3010
3011 D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags,
3012 *total_flags);
3013
3014 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
3015 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
3016 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3017
3018 #undef CHK
3019
3020 mutex_lock(&il->mutex);
3021
3022 il->staging.filter_flags &= ~filter_nand;
3023 il->staging.filter_flags |= filter_or;
3024
3025 /*
3026 * Not committing directly because hardware can perform a scan,
3027 * but even if hw is ready, committing here breaks for some reason,
3028 * we'll eventually commit the filter flags change anyway.
3029 */
3030
3031 mutex_unlock(&il->mutex);
3032
3033 /*
3034 * Receiving all multicast frames is always enabled by the
3035 * default flags setup in il_connection_init_rx_config()
3036 * since we currently do not support programming multicast
3037 * filters into the device.
3038 */
3039 *total_flags &=
3040 FIF_OTHER_BSS | FIF_ALLMULTI |
3041 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3042 }
3043
3044 /*****************************************************************************
3045 *
3046 * sysfs attributes
3047 *
3048 *****************************************************************************/
3049
3050 #ifdef CONFIG_IWLEGACY_DEBUG
3051
3052 /*
3053 * The following adds a new attribute to the sysfs representation
3054 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3055 * used for controlling the debug level.
3056 *
3057 * See the level definitions in iwl for details.
3058 *
3059 * The debug_level being managed using sysfs below is a per device debug
3060 * level that is used instead of the global debug level if it (the per
3061 * device debug level) is set.
3062 */
3063 static ssize_t
3064 il3945_show_debug_level(struct device *d, struct device_attribute *attr,
3065 char *buf)
3066 {
3067 struct il_priv *il = dev_get_drvdata(d);
3068 return sprintf(buf, "0x%08X\n", il_get_debug_level(il));
3069 }
3070
3071 static ssize_t
3072 il3945_store_debug_level(struct device *d, struct device_attribute *attr,
3073 const char *buf, size_t count)
3074 {
3075 struct il_priv *il = dev_get_drvdata(d);
3076 unsigned long val;
3077 int ret;
3078
3079 ret = kstrtoul(buf, 0, &val);
3080 if (ret)
3081 IL_INFO("%s is not in hex or decimal form.\n", buf);
3082 else
3083 il->debug_level = val;
3084
3085 return strnlen(buf, count);
3086 }
3087
3088 static DEVICE_ATTR(debug_level, 0644, il3945_show_debug_level,
3089 il3945_store_debug_level);
3090
3091 #endif /* CONFIG_IWLEGACY_DEBUG */
3092
3093 static ssize_t
3094 il3945_show_temperature(struct device *d, struct device_attribute *attr,
3095 char *buf)
3096 {
3097 struct il_priv *il = dev_get_drvdata(d);
3098
3099 if (!il_is_alive(il))
3100 return -EAGAIN;
3101
3102 return sprintf(buf, "%d\n", il3945_hw_get_temperature(il));
3103 }
3104
3105 static DEVICE_ATTR(temperature, 0444, il3945_show_temperature, NULL);
3106
3107 static ssize_t
3108 il3945_show_tx_power(struct device *d, struct device_attribute *attr, char *buf)
3109 {
3110 struct il_priv *il = dev_get_drvdata(d);
3111 return sprintf(buf, "%d\n", il->tx_power_user_lmt);
3112 }
3113
3114 static ssize_t
3115 il3945_store_tx_power(struct device *d, struct device_attribute *attr,
3116 const char *buf, size_t count)
3117 {
3118 struct il_priv *il = dev_get_drvdata(d);
3119 char *p = (char *)buf;
3120 u32 val;
3121
3122 val = simple_strtoul(p, &p, 10);
3123 if (p == buf)
3124 IL_INFO(": %s is not in decimal form.\n", buf);
3125 else
3126 il3945_hw_reg_set_txpower(il, val);
3127
3128 return count;
3129 }
3130
3131 static DEVICE_ATTR(tx_power, 0644, il3945_show_tx_power, il3945_store_tx_power);
3132
3133 static ssize_t
3134 il3945_show_flags(struct device *d, struct device_attribute *attr, char *buf)
3135 {
3136 struct il_priv *il = dev_get_drvdata(d);
3137
3138 return sprintf(buf, "0x%04X\n", il->active.flags);
3139 }
3140
3141 static ssize_t
3142 il3945_store_flags(struct device *d, struct device_attribute *attr,
3143 const char *buf, size_t count)
3144 {
3145 struct il_priv *il = dev_get_drvdata(d);
3146 u32 flags = simple_strtoul(buf, NULL, 0);
3147
3148 mutex_lock(&il->mutex);
3149 if (le32_to_cpu(il->staging.flags) != flags) {
3150 /* Cancel any currently running scans... */
3151 if (il_scan_cancel_timeout(il, 100))
3152 IL_WARN("Could not cancel scan.\n");
3153 else {
3154 D_INFO("Committing rxon.flags = 0x%04X\n", flags);
3155 il->staging.flags = cpu_to_le32(flags);
3156 il3945_commit_rxon(il);
3157 }
3158 }
3159 mutex_unlock(&il->mutex);
3160
3161 return count;
3162 }
3163
3164 static DEVICE_ATTR(flags, 0644, il3945_show_flags, il3945_store_flags);
3165
3166 static ssize_t
3167 il3945_show_filter_flags(struct device *d, struct device_attribute *attr,
3168 char *buf)
3169 {
3170 struct il_priv *il = dev_get_drvdata(d);
3171
3172 return sprintf(buf, "0x%04X\n", le32_to_cpu(il->active.filter_flags));
3173 }
3174
3175 static ssize_t
3176 il3945_store_filter_flags(struct device *d, struct device_attribute *attr,
3177 const char *buf, size_t count)
3178 {
3179 struct il_priv *il = dev_get_drvdata(d);
3180 u32 filter_flags = simple_strtoul(buf, NULL, 0);
3181
3182 mutex_lock(&il->mutex);
3183 if (le32_to_cpu(il->staging.filter_flags) != filter_flags) {
3184 /* Cancel any currently running scans... */
3185 if (il_scan_cancel_timeout(il, 100))
3186 IL_WARN("Could not cancel scan.\n");
3187 else {
3188 D_INFO("Committing rxon.filter_flags = " "0x%04X\n",
3189 filter_flags);
3190 il->staging.filter_flags = cpu_to_le32(filter_flags);
3191 il3945_commit_rxon(il);
3192 }
3193 }
3194 mutex_unlock(&il->mutex);
3195
3196 return count;
3197 }
3198
3199 static DEVICE_ATTR(filter_flags, 0644, il3945_show_filter_flags,
3200 il3945_store_filter_flags);
3201
3202 static ssize_t
3203 il3945_show_measurement(struct device *d, struct device_attribute *attr,
3204 char *buf)
3205 {
3206 struct il_priv *il = dev_get_drvdata(d);
3207 struct il_spectrum_notification measure_report;
3208 u32 size = sizeof(measure_report), len = 0, ofs = 0;
3209 u8 *data = (u8 *) &measure_report;
3210 unsigned long flags;
3211
3212 spin_lock_irqsave(&il->lock, flags);
3213 if (!(il->measurement_status & MEASUREMENT_READY)) {
3214 spin_unlock_irqrestore(&il->lock, flags);
3215 return 0;
3216 }
3217 memcpy(&measure_report, &il->measure_report, size);
3218 il->measurement_status = 0;
3219 spin_unlock_irqrestore(&il->lock, flags);
3220
3221 while (size && PAGE_SIZE - len) {
3222 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3223 PAGE_SIZE - len, true);
3224 len = strlen(buf);
3225 if (PAGE_SIZE - len)
3226 buf[len++] = '\n';
3227
3228 ofs += 16;
3229 size -= min(size, 16U);
3230 }
3231
3232 return len;
3233 }
3234
3235 static ssize_t
3236 il3945_store_measurement(struct device *d, struct device_attribute *attr,
3237 const char *buf, size_t count)
3238 {
3239 struct il_priv *il = dev_get_drvdata(d);
3240 struct ieee80211_measurement_params params = {
3241 .channel = le16_to_cpu(il->active.channel),
3242 .start_time = cpu_to_le64(il->_3945.last_tsf),
3243 .duration = cpu_to_le16(1),
3244 };
3245 u8 type = IL_MEASURE_BASIC;
3246 u8 buffer[32];
3247 u8 channel;
3248
3249 if (count) {
3250 char *p = buffer;
3251 strscpy(buffer, buf, sizeof(buffer));
3252 channel = simple_strtoul(p, NULL, 0);
3253 if (channel)
3254 params.channel = channel;
3255
3256 p = buffer;
3257 while (*p && *p != ' ')
3258 p++;
3259 if (*p)
3260 type = simple_strtoul(p + 1, NULL, 0);
3261 }
3262
3263 D_INFO("Invoking measurement of type %d on " "channel %d (for '%s')\n",
3264 type, params.channel, buf);
3265 il3945_get_measurement(il, &params, type);
3266
3267 return count;
3268 }
3269
3270 static DEVICE_ATTR(measurement, 0600, il3945_show_measurement,
3271 il3945_store_measurement);
3272
3273 static ssize_t
3274 il3945_store_retry_rate(struct device *d, struct device_attribute *attr,
3275 const char *buf, size_t count)
3276 {
3277 struct il_priv *il = dev_get_drvdata(d);
3278
3279 il->retry_rate = simple_strtoul(buf, NULL, 0);
3280 if (il->retry_rate <= 0)
3281 il->retry_rate = 1;
3282
3283 return count;
3284 }
3285
3286 static ssize_t
3287 il3945_show_retry_rate(struct device *d, struct device_attribute *attr,
3288 char *buf)
3289 {
3290 struct il_priv *il = dev_get_drvdata(d);
3291 return sprintf(buf, "%d", il->retry_rate);
3292 }
3293
3294 static DEVICE_ATTR(retry_rate, 0600, il3945_show_retry_rate,
3295 il3945_store_retry_rate);
3296
3297 static ssize_t
3298 il3945_show_channels(struct device *d, struct device_attribute *attr, char *buf)
3299 {
3300 /* all this shit doesn't belong into sysfs anyway */
3301 return 0;
3302 }
3303
3304 static DEVICE_ATTR(channels, 0400, il3945_show_channels, NULL);
3305
3306 static ssize_t
3307 il3945_show_antenna(struct device *d, struct device_attribute *attr, char *buf)
3308 {
3309 struct il_priv *il = dev_get_drvdata(d);
3310
3311 if (!il_is_alive(il))
3312 return -EAGAIN;
3313
3314 return sprintf(buf, "%d\n", il3945_mod_params.antenna);
3315 }
3316
3317 static ssize_t
3318 il3945_store_antenna(struct device *d, struct device_attribute *attr,
3319 const char *buf, size_t count)
3320 {
3321 struct il_priv *il __maybe_unused = dev_get_drvdata(d);
3322 int ant;
3323
3324 if (count == 0)
3325 return 0;
3326
3327 if (sscanf(buf, "%1i", &ant) != 1) {
3328 D_INFO("not in hex or decimal form.\n");
3329 return count;
3330 }
3331
3332 if (ant >= 0 && ant <= 2) {
3333 D_INFO("Setting antenna select to %d.\n", ant);
3334 il3945_mod_params.antenna = (enum il3945_antenna)ant;
3335 } else
3336 D_INFO("Bad antenna select value %d.\n", ant);
3337
3338 return count;
3339 }
3340
3341 static DEVICE_ATTR(antenna, 0644, il3945_show_antenna, il3945_store_antenna);
3342
3343 static ssize_t
3344 il3945_show_status(struct device *d, struct device_attribute *attr, char *buf)
3345 {
3346 struct il_priv *il = dev_get_drvdata(d);
3347 if (!il_is_alive(il))
3348 return -EAGAIN;
3349 return sprintf(buf, "0x%08x\n", (int)il->status);
3350 }
3351
3352 static DEVICE_ATTR(status, 0444, il3945_show_status, NULL);
3353
3354 static ssize_t
3355 il3945_dump_error_log(struct device *d, struct device_attribute *attr,
3356 const char *buf, size_t count)
3357 {
3358 struct il_priv *il = dev_get_drvdata(d);
3359 char *p = (char *)buf;
3360
3361 if (p[0] == '1')
3362 il3945_dump_nic_error_log(il);
3363
3364 return strnlen(buf, count);
3365 }
3366
3367 static DEVICE_ATTR(dump_errors, 0200, NULL, il3945_dump_error_log);
3368
3369 /*****************************************************************************
3370 *
3371 * driver setup and tear down
3372 *
3373 *****************************************************************************/
3374
3375 static int
3376 il3945_setup_deferred_work(struct il_priv *il)
3377 {
3378 il->workqueue = create_singlethread_workqueue(DRV_NAME);
3379 if (!il->workqueue)
3380 return -ENOMEM;
3381
3382 init_waitqueue_head(&il->wait_command_queue);
3383
3384 INIT_WORK(&il->restart, il3945_bg_restart);
3385 INIT_WORK(&il->rx_replenish, il3945_bg_rx_replenish);
3386 INIT_DELAYED_WORK(&il->init_alive_start, il3945_bg_init_alive_start);
3387 INIT_DELAYED_WORK(&il->alive_start, il3945_bg_alive_start);
3388 INIT_DELAYED_WORK(&il->_3945.rfkill_poll, il3945_rfkill_poll);
3389
3390 il_setup_scan_deferred_work(il);
3391
3392 il3945_hw_setup_deferred_work(il);
3393
3394 timer_setup(&il->watchdog, il_bg_watchdog, 0);
3395
3396 tasklet_setup(&il->irq_tasklet, il3945_irq_tasklet);
3397
3398 return 0;
3399 }
3400
3401 static void
3402 il3945_cancel_deferred_work(struct il_priv *il)
3403 {
3404 il3945_hw_cancel_deferred_work(il);
3405
3406 cancel_delayed_work_sync(&il->init_alive_start);
3407 cancel_delayed_work(&il->alive_start);
3408
3409 il_cancel_scan_deferred_work(il);
3410 }
3411
3412 static struct attribute *il3945_sysfs_entries[] = {
3413 &dev_attr_antenna.attr,
3414 &dev_attr_channels.attr,
3415 &dev_attr_dump_errors.attr,
3416 &dev_attr_flags.attr,
3417 &dev_attr_filter_flags.attr,
3418 &dev_attr_measurement.attr,
3419 &dev_attr_retry_rate.attr,
3420 &dev_attr_status.attr,
3421 &dev_attr_temperature.attr,
3422 &dev_attr_tx_power.attr,
3423 #ifdef CONFIG_IWLEGACY_DEBUG
3424 &dev_attr_debug_level.attr,
3425 #endif
3426 NULL
3427 };
3428
3429 static const struct attribute_group il3945_attribute_group = {
3430 .name = NULL, /* put in device directory */
3431 .attrs = il3945_sysfs_entries,
3432 };
3433
3434 static struct ieee80211_ops il3945_mac_ops __ro_after_init = {
3435 .add_chanctx = ieee80211_emulate_add_chanctx,
3436 .remove_chanctx = ieee80211_emulate_remove_chanctx,
3437 .change_chanctx = ieee80211_emulate_change_chanctx,
3438 .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
3439 .tx = il3945_mac_tx,
3440 .wake_tx_queue = ieee80211_handle_wake_tx_queue,
3441 .start = il3945_mac_start,
3442 .stop = il3945_mac_stop,
3443 .add_interface = il_mac_add_interface,
3444 .remove_interface = il_mac_remove_interface,
3445 .change_interface = il_mac_change_interface,
3446 .config = il_mac_config,
3447 .configure_filter = il3945_configure_filter,
3448 .set_key = il3945_mac_set_key,
3449 .conf_tx = il_mac_conf_tx,
3450 .reset_tsf = il_mac_reset_tsf,
3451 .bss_info_changed = il_mac_bss_info_changed,
3452 .hw_scan = il_mac_hw_scan,
3453 .sta_add = il3945_mac_sta_add,
3454 .sta_remove = il_mac_sta_remove,
3455 .tx_last_beacon = il_mac_tx_last_beacon,
3456 .flush = il_mac_flush,
3457 };
3458
3459 static int
3460 il3945_init_drv(struct il_priv *il)
3461 {
3462 int ret;
3463 struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
3464
3465 il->retry_rate = 1;
3466 il->beacon_skb = NULL;
3467
3468 spin_lock_init(&il->sta_lock);
3469 spin_lock_init(&il->hcmd_lock);
3470
3471 INIT_LIST_HEAD(&il->free_frames);
3472
3473 mutex_init(&il->mutex);
3474
3475 il->ieee_channels = NULL;
3476 il->ieee_rates = NULL;
3477 il->band = NL80211_BAND_2GHZ;
3478
3479 il->iw_mode = NL80211_IFTYPE_STATION;
3480 il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF;
3481
3482 /* initialize force reset */
3483 il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD;
3484
3485 if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3486 IL_WARN("Unsupported EEPROM version: 0x%04X\n",
3487 eeprom->version);
3488 ret = -EINVAL;
3489 goto err;
3490 }
3491 ret = il_init_channel_map(il);
3492 if (ret) {
3493 IL_ERR("initializing regulatory failed: %d\n", ret);
3494 goto err;
3495 }
3496
3497 /* Set up txpower settings in driver for all channels */
3498 if (il3945_txpower_set_from_eeprom(il)) {
3499 ret = -EIO;
3500 goto err_free_channel_map;
3501 }
3502
3503 ret = il_init_geos(il);
3504 if (ret) {
3505 IL_ERR("initializing geos failed: %d\n", ret);
3506 goto err_free_channel_map;
3507 }
3508 il3945_init_hw_rates(il, il->ieee_rates);
3509
3510 return 0;
3511
3512 err_free_channel_map:
3513 il_free_channel_map(il);
3514 err:
3515 return ret;
3516 }
3517
3518 #define IL3945_MAX_PROBE_REQUEST 200
3519
3520 static int
3521 il3945_setup_mac(struct il_priv *il)
3522 {
3523 int ret;
3524 struct ieee80211_hw *hw = il->hw;
3525
3526 hw->rate_control_algorithm = "iwl-3945-rs";
3527 hw->sta_data_size = sizeof(struct il3945_sta_priv);
3528 hw->vif_data_size = sizeof(struct il_vif_priv);
3529
3530 /* Tell mac80211 our characteristics */
3531 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
3532 ieee80211_hw_set(hw, SUPPORTS_PS);
3533 ieee80211_hw_set(hw, SIGNAL_DBM);
3534 ieee80211_hw_set(hw, SPECTRUM_MGMT);
3535
3536 hw->wiphy->interface_modes =
3537 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
3538
3539 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
3540 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
3541 REGULATORY_DISABLE_BEACON_HINTS;
3542
3543 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
3544
3545 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3546 /* we create the 802.11 header and a zero-length SSID element */
3547 hw->wiphy->max_scan_ie_len = IL3945_MAX_PROBE_REQUEST - 24 - 2;
3548
3549 /* Default value; 4 EDCA QOS priorities */
3550 hw->queues = 4;
3551
3552 if (il->bands[NL80211_BAND_2GHZ].n_channels)
3553 il->hw->wiphy->bands[NL80211_BAND_2GHZ] =
3554 &il->bands[NL80211_BAND_2GHZ];
3555
3556 if (il->bands[NL80211_BAND_5GHZ].n_channels)
3557 il->hw->wiphy->bands[NL80211_BAND_5GHZ] =
3558 &il->bands[NL80211_BAND_5GHZ];
3559
3560 il_leds_init(il);
3561
3562 wiphy_ext_feature_set(il->hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
3563
3564 ret = ieee80211_register_hw(il->hw);
3565 if (ret) {
3566 IL_ERR("Failed to register hw (error %d)\n", ret);
3567 return ret;
3568 }
3569 il->mac80211_registered = 1;
3570
3571 return 0;
3572 }
3573
3574 static int
3575 il3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3576 {
3577 int err = 0;
3578 struct il_priv *il;
3579 struct ieee80211_hw *hw;
3580 struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data);
3581 struct il3945_eeprom *eeprom;
3582 unsigned long flags;
3583
3584 /***********************
3585 * 1. Allocating HW data
3586 * ********************/
3587
3588 hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il3945_mac_ops);
3589 if (!hw) {
3590 err = -ENOMEM;
3591 goto out;
3592 }
3593 il = hw->priv;
3594 il->hw = hw;
3595 SET_IEEE80211_DEV(hw, &pdev->dev);
3596
3597 il->cmd_queue = IL39_CMD_QUEUE_NUM;
3598
3599 D_INFO("*** LOAD DRIVER ***\n");
3600 il->cfg = cfg;
3601 il->ops = &il3945_ops;
3602 #ifdef CONFIG_IWLEGACY_DEBUGFS
3603 il->debugfs_ops = &il3945_debugfs_ops;
3604 #endif
3605 il->pci_dev = pdev;
3606 il->inta_mask = CSR_INI_SET_MASK;
3607
3608 /***************************
3609 * 2. Initializing PCI bus
3610 * *************************/
3611 pci_disable_link_state(pdev,
3612 PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
3613 PCIE_LINK_STATE_CLKPM);
3614
3615 if (pci_enable_device(pdev)) {
3616 err = -ENODEV;
3617 goto out_ieee80211_free_hw;
3618 }
3619
3620 pci_set_master(pdev);
3621
3622 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
3623 if (err) {
3624 IL_WARN("No suitable DMA available.\n");
3625 goto out_pci_disable_device;
3626 }
3627
3628 pci_set_drvdata(pdev, il);
3629 err = pci_request_regions(pdev, DRV_NAME);
3630 if (err)
3631 goto out_pci_disable_device;
3632
3633 /***********************
3634 * 3. Read REV Register
3635 * ********************/
3636 il->hw_base = pci_ioremap_bar(pdev, 0);
3637 if (!il->hw_base) {
3638 err = -ENODEV;
3639 goto out_pci_release_regions;
3640 }
3641
3642 D_INFO("pci_resource_len = 0x%08llx\n",
3643 (unsigned long long)pci_resource_len(pdev, 0));
3644 D_INFO("pci_resource_base = %p\n", il->hw_base);
3645
3646 /* We disable the RETRY_TIMEOUT register (0x41) to keep
3647 * PCI Tx retries from interfering with C3 CPU state */
3648 pci_write_config_byte(pdev, 0x41, 0x00);
3649
3650 /* these spin locks will be used in apm_init and EEPROM access
3651 * we should init now
3652 */
3653 spin_lock_init(&il->reg_lock);
3654 spin_lock_init(&il->lock);
3655
3656 /*
3657 * stop and reset the on-board processor just in case it is in a
3658 * strange state ... like being left stranded by a primary kernel
3659 * and this is now the kdump kernel trying to start up
3660 */
3661 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3662
3663 /***********************
3664 * 4. Read EEPROM
3665 * ********************/
3666
3667 /* Read the EEPROM */
3668 err = il_eeprom_init(il);
3669 if (err) {
3670 IL_ERR("Unable to init EEPROM\n");
3671 goto out_iounmap;
3672 }
3673 /* MAC Address location in EEPROM same for 3945/4965 */
3674 eeprom = (struct il3945_eeprom *)il->eeprom;
3675 D_INFO("MAC address: %pM\n", eeprom->mac_address);
3676 SET_IEEE80211_PERM_ADDR(il->hw, eeprom->mac_address);
3677
3678 /***********************
3679 * 5. Setup HW Constants
3680 * ********************/
3681 /* Device-specific setup */
3682 err = il3945_hw_set_hw_params(il);
3683 if (err) {
3684 IL_ERR("failed to set hw settings\n");
3685 goto out_eeprom_free;
3686 }
3687
3688 /***********************
3689 * 6. Setup il
3690 * ********************/
3691
3692 err = il3945_init_drv(il);
3693 if (err) {
3694 IL_ERR("initializing driver failed\n");
3695 goto out_unset_hw_params;
3696 }
3697
3698 IL_INFO("Detected Intel Wireless WiFi Link %s\n", il->cfg->name);
3699
3700 /***********************
3701 * 7. Setup Services
3702 * ********************/
3703
3704 spin_lock_irqsave(&il->lock, flags);
3705 il_disable_interrupts(il);
3706 spin_unlock_irqrestore(&il->lock, flags);
3707
3708 pci_enable_msi(il->pci_dev);
3709
3710 err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il);
3711 if (err) {
3712 IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq);
3713 goto out_disable_msi;
3714 }
3715
3716 err = sysfs_create_group(&pdev->dev.kobj, &il3945_attribute_group);
3717 if (err) {
3718 IL_ERR("failed to create sysfs device attributes\n");
3719 goto out_release_irq;
3720 }
3721
3722 il_set_rxon_channel(il, &il->bands[NL80211_BAND_2GHZ].channels[5]);
3723 err = il3945_setup_deferred_work(il);
3724 if (err)
3725 goto out_remove_sysfs;
3726
3727 il3945_setup_handlers(il);
3728 il_power_initialize(il);
3729
3730 /*********************************
3731 * 8. Setup and Register mac80211
3732 * *******************************/
3733
3734 il_enable_interrupts(il);
3735
3736 err = il3945_setup_mac(il);
3737 if (err)
3738 goto out_destroy_workqueue;
3739
3740 il_dbgfs_register(il, DRV_NAME);
3741
3742 /* Start monitoring the killswitch */
3743 queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll, 2 * HZ);
3744
3745 return 0;
3746
3747 out_destroy_workqueue:
3748 destroy_workqueue(il->workqueue);
3749 il->workqueue = NULL;
3750 out_remove_sysfs:
3751 sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
3752 out_release_irq:
3753 free_irq(il->pci_dev->irq, il);
3754 out_disable_msi:
3755 pci_disable_msi(il->pci_dev);
3756 il_free_geos(il);
3757 il_free_channel_map(il);
3758 out_unset_hw_params:
3759 il3945_unset_hw_params(il);
3760 out_eeprom_free:
3761 il_eeprom_free(il);
3762 out_iounmap:
3763 iounmap(il->hw_base);
3764 out_pci_release_regions:
3765 pci_release_regions(pdev);
3766 out_pci_disable_device:
3767 pci_disable_device(pdev);
3768 out_ieee80211_free_hw:
3769 ieee80211_free_hw(il->hw);
3770 out:
3771 return err;
3772 }
3773
3774 static void
3775 il3945_pci_remove(struct pci_dev *pdev)
3776 {
3777 struct il_priv *il = pci_get_drvdata(pdev);
3778 unsigned long flags;
3779
3780 if (!il)
3781 return;
3782
3783 D_INFO("*** UNLOAD DRIVER ***\n");
3784
3785 il_dbgfs_unregister(il);
3786
3787 set_bit(S_EXIT_PENDING, &il->status);
3788
3789 il_leds_exit(il);
3790
3791 if (il->mac80211_registered) {
3792 ieee80211_unregister_hw(il->hw);
3793 il->mac80211_registered = 0;
3794 } else {
3795 il3945_down(il);
3796 }
3797
3798 /*
3799 * Make sure device is reset to low power before unloading driver.
3800 * This may be redundant with il_down(), but there are paths to
3801 * run il_down() without calling apm_ops.stop(), and there are
3802 * paths to avoid running il_down() at all before leaving driver.
3803 * This (inexpensive) call *makes sure* device is reset.
3804 */
3805 il_apm_stop(il);
3806
3807 /* make sure we flush any pending irq or
3808 * tasklet for the driver
3809 */
3810 spin_lock_irqsave(&il->lock, flags);
3811 il_disable_interrupts(il);
3812 spin_unlock_irqrestore(&il->lock, flags);
3813
3814 il3945_synchronize_irq(il);
3815
3816 sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
3817
3818 cancel_delayed_work_sync(&il->_3945.rfkill_poll);
3819
3820 il3945_dealloc_ucode_pci(il);
3821
3822 if (il->rxq.bd)
3823 il3945_rx_queue_free(il, &il->rxq);
3824 il3945_hw_txq_ctx_free(il);
3825
3826 il3945_unset_hw_params(il);
3827
3828 /*netif_stop_queue(dev); */
3829
3830 /* ieee80211_unregister_hw calls il3945_mac_stop, which flushes
3831 * il->workqueue... so we can't take down the workqueue
3832 * until now... */
3833 destroy_workqueue(il->workqueue);
3834 il->workqueue = NULL;
3835
3836 free_irq(pdev->irq, il);
3837 pci_disable_msi(pdev);
3838
3839 iounmap(il->hw_base);
3840 pci_release_regions(pdev);
3841 pci_disable_device(pdev);
3842
3843 il_free_channel_map(il);
3844 il_free_geos(il);
3845 kfree(il->scan_cmd);
3846 dev_kfree_skb(il->beacon_skb);
3847 ieee80211_free_hw(il->hw);
3848 }
3849
3850 /*****************************************************************************
3851 *
3852 * driver and module entry point
3853 *
3854 *****************************************************************************/
3855
3856 static struct pci_driver il3945_driver = {
3857 .name = DRV_NAME,
3858 .id_table = il3945_hw_card_ids,
3859 .probe = il3945_pci_probe,
3860 .remove = il3945_pci_remove,
3861 .driver.pm = IL_LEGACY_PM_OPS,
3862 };
3863
3864 static int __init
3865 il3945_init(void)
3866 {
3867
3868 int ret;
3869 pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3870 pr_info(DRV_COPYRIGHT "\n");
3871
3872 /*
3873 * Disabling hardware scan means that mac80211 will perform scans
3874 * "the hard way", rather than using device's scan.
3875 */
3876 if (il3945_mod_params.disable_hw_scan) {
3877 pr_info("hw_scan is disabled\n");
3878 il3945_mac_ops.hw_scan = NULL;
3879 }
3880
3881 ret = il3945_rate_control_register();
3882 if (ret) {
3883 pr_err("Unable to register rate control algorithm: %d\n", ret);
3884 return ret;
3885 }
3886
3887 ret = pci_register_driver(&il3945_driver);
3888 if (ret) {
3889 pr_err("Unable to initialize PCI module\n");
3890 goto error_register;
3891 }
3892
3893 return ret;
3894
3895 error_register:
3896 il3945_rate_control_unregister();
3897 return ret;
3898 }
3899
3900 static void __exit
3901 il3945_exit(void)
3902 {
3903 pci_unregister_driver(&il3945_driver);
3904 il3945_rate_control_unregister();
3905 }
3906
3907 MODULE_FIRMWARE(IL3945_MODULE_FIRMWARE(IL3945_UCODE_API_MAX));
3908
3909 module_param_named(antenna, il3945_mod_params.antenna, int, 0444);
3910 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
3911 module_param_named(swcrypto, il3945_mod_params.sw_crypto, int, 0444);
3912 MODULE_PARM_DESC(swcrypto, "using software crypto (default 1 [software])");
3913 module_param_named(disable_hw_scan, il3945_mod_params.disable_hw_scan, int,
3914 0444);
3915 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 1)");
3916 #ifdef CONFIG_IWLEGACY_DEBUG
3917 module_param_named(debug, il_debug_level, uint, 0644);
3918 MODULE_PARM_DESC(debug, "debug output mask");
3919 #endif
3920 module_param_named(fw_restart, il3945_mod_params.restart_fw, int, 0444);
3921 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
3922
3923 module_exit(il3945_exit);
3924 module_init(il3945_init);
Kernel DRM miscellaneous fixes and cross-tree changes