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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwmc3200wifi / rx.c
blobd32adeab68a38e98065d9338e0eb8bb38b0faefe
1 /*
2 * Intel Wireless Multicomm 3200 WiFi driver
3 *
4 * Copyright (C) 2009 Intel Corporation. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
15 * distribution.
16 * * Neither the name of Intel Corporation nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 *
32 *
33 * Intel Corporation <ilw@linux.intel.com>
34 * Samuel Ortiz <samuel.ortiz@intel.com>
35 * Zhu Yi <yi.zhu@intel.com>
36 *
37 */
38
39 #include <linux/kernel.h>
40 #include <linux/netdevice.h>
41 #include <linux/sched.h>
42 #include <linux/etherdevice.h>
43 #include <linux/wireless.h>
44 #include <linux/ieee80211.h>
45 #include <linux/if_arp.h>
46 #include <linux/list.h>
47 #include <net/iw_handler.h>
48
49 #include "iwm.h"
50 #include "debug.h"
51 #include "hal.h"
52 #include "umac.h"
53 #include "lmac.h"
54 #include "commands.h"
55 #include "rx.h"
56 #include "cfg80211.h"
57 #include "eeprom.h"
58
59 static int iwm_rx_check_udma_hdr(struct iwm_udma_in_hdr *hdr)
60 {
61 if ((le32_to_cpu(hdr->cmd) == UMAC_PAD_TERMINAL) ||
62 (le32_to_cpu(hdr->size) == UMAC_PAD_TERMINAL))
63 return -EINVAL;
64
65 return 0;
66 }
67
68 static inline int iwm_rx_resp_size(struct iwm_udma_in_hdr *hdr)
69 {
70 return ALIGN(le32_to_cpu(hdr->size) + sizeof(struct iwm_udma_in_hdr),
71 16);
72 }
73
74 /*
75 * Notification handlers:
76 *
77 * For every possible notification we can receive from the
78 * target, we have a handler.
79 * When we get a target notification, and there is no one
80 * waiting for it, it's just processed through the rx code
81 * path:
82 *
83 * iwm_rx_handle()
84 * -> iwm_rx_handle_umac()
85 * -> iwm_rx_handle_wifi()
86 * -> iwm_rx_handle_resp()
87 * -> iwm_ntf_*()
88 *
89 * OR
90 *
91 * -> iwm_rx_handle_non_wifi()
92 *
93 * If there are processes waiting for this notification, then
94 * iwm_rx_handle_wifi() just wakes those processes up and they
95 * grab the pending notification.
96 */
97 static int iwm_ntf_error(struct iwm_priv *iwm, u8 *buf,
98 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
99 {
100 struct iwm_umac_notif_error *error;
101 struct iwm_fw_error_hdr *fw_err;
102
103 error = (struct iwm_umac_notif_error *)buf;
104 fw_err = &error->err;
105
106 memcpy(iwm->last_fw_err, fw_err, sizeof(struct iwm_fw_error_hdr));
107
108 IWM_ERR(iwm, "%cMAC FW ERROR:\n",
109 (le32_to_cpu(fw_err->category) == UMAC_SYS_ERR_CAT_LMAC) ? 'L' : 'U');
110 IWM_ERR(iwm, "\tCategory: %d\n", le32_to_cpu(fw_err->category));
111 IWM_ERR(iwm, "\tStatus: 0x%x\n", le32_to_cpu(fw_err->status));
112 IWM_ERR(iwm, "\tPC: 0x%x\n", le32_to_cpu(fw_err->pc));
113 IWM_ERR(iwm, "\tblink1: %d\n", le32_to_cpu(fw_err->blink1));
114 IWM_ERR(iwm, "\tblink2: %d\n", le32_to_cpu(fw_err->blink2));
115 IWM_ERR(iwm, "\tilink1: %d\n", le32_to_cpu(fw_err->ilink1));
116 IWM_ERR(iwm, "\tilink2: %d\n", le32_to_cpu(fw_err->ilink2));
117 IWM_ERR(iwm, "\tData1: 0x%x\n", le32_to_cpu(fw_err->data1));
118 IWM_ERR(iwm, "\tData2: 0x%x\n", le32_to_cpu(fw_err->data2));
119 IWM_ERR(iwm, "\tLine number: %d\n", le32_to_cpu(fw_err->line_num));
120 IWM_ERR(iwm, "\tUMAC status: 0x%x\n", le32_to_cpu(fw_err->umac_status));
121 IWM_ERR(iwm, "\tLMAC status: 0x%x\n", le32_to_cpu(fw_err->lmac_status));
122 IWM_ERR(iwm, "\tSDIO status: 0x%x\n", le32_to_cpu(fw_err->sdio_status));
123
124 iwm_resetting(iwm);
125
126 return 0;
127 }
128
129 static int iwm_ntf_umac_alive(struct iwm_priv *iwm, u8 *buf,
130 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
131 {
132 struct iwm_umac_notif_alive *alive_resp =
133 (struct iwm_umac_notif_alive *)(buf);
134 u16 status = le16_to_cpu(alive_resp->status);
135
136 if (status == UMAC_NTFY_ALIVE_STATUS_ERR) {
137 IWM_ERR(iwm, "Receive error UMAC_ALIVE\n");
138 return -EIO;
139 }
140
141 iwm_tx_credit_init_pools(iwm, alive_resp);
142
143 return 0;
144 }
145
146 static int iwm_ntf_init_complete(struct iwm_priv *iwm, u8 *buf,
147 unsigned long buf_size,
148 struct iwm_wifi_cmd *cmd)
149 {
150 struct wiphy *wiphy = iwm_to_wiphy(iwm);
151 struct iwm_umac_notif_init_complete *init_complete =
152 (struct iwm_umac_notif_init_complete *)(buf);
153 u16 status = le16_to_cpu(init_complete->status);
154 bool blocked = (status == UMAC_NTFY_INIT_COMPLETE_STATUS_ERR);
155
156 if (blocked)
157 IWM_DBG_NTF(iwm, DBG, "Hardware rf kill is on (radio off)\n");
158 else
159 IWM_DBG_NTF(iwm, DBG, "Hardware rf kill is off (radio on)\n");
160
161 wiphy_rfkill_set_hw_state(wiphy, blocked);
162
163 return 0;
164 }
165
166 static int iwm_ntf_tx_credit_update(struct iwm_priv *iwm, u8 *buf,
167 unsigned long buf_size,
168 struct iwm_wifi_cmd *cmd)
169 {
170 int pool_nr, total_freed_pages;
171 unsigned long pool_map;
172 int i, id;
173 struct iwm_umac_notif_page_dealloc *dealloc =
174 (struct iwm_umac_notif_page_dealloc *)buf;
175
176 pool_nr = GET_VAL32(dealloc->changes, UMAC_DEALLOC_NTFY_CHANGES_CNT);
177 pool_map = GET_VAL32(dealloc->changes, UMAC_DEALLOC_NTFY_CHANGES_MSK);
178
179 IWM_DBG_TX(iwm, DBG, "UMAC dealloc notification: pool nr %d, "
180 "update map 0x%lx\n", pool_nr, pool_map);
181
182 spin_lock(&iwm->tx_credit.lock);
183
184 for (i = 0; i < pool_nr; i++) {
185 id = GET_VAL32(dealloc->grp_info[i],
186 UMAC_DEALLOC_NTFY_GROUP_NUM);
187 if (test_bit(id, &pool_map)) {
188 total_freed_pages = GET_VAL32(dealloc->grp_info[i],
189 UMAC_DEALLOC_NTFY_PAGE_CNT);
190 iwm_tx_credit_inc(iwm, id, total_freed_pages);
191 }
192 }
193
194 spin_unlock(&iwm->tx_credit.lock);
195
196 return 0;
197 }
198
199 static int iwm_ntf_umac_reset(struct iwm_priv *iwm, u8 *buf,
200 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
201 {
202 IWM_DBG_NTF(iwm, DBG, "UMAC RESET done\n");
203
204 return 0;
205 }
206
207 static int iwm_ntf_lmac_version(struct iwm_priv *iwm, u8 *buf,
208 unsigned long buf_size,
209 struct iwm_wifi_cmd *cmd)
210 {
211 IWM_DBG_NTF(iwm, INFO, "LMAC Version: %x.%x\n", buf[9], buf[8]);
212
213 return 0;
214 }
215
216 static int iwm_ntf_tx(struct iwm_priv *iwm, u8 *buf,
217 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
218 {
219 struct iwm_lmac_tx_resp *tx_resp;
220 struct iwm_umac_wifi_in_hdr *hdr;
221
222 tx_resp = (struct iwm_lmac_tx_resp *)
223 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
224 hdr = (struct iwm_umac_wifi_in_hdr *)buf;
225
226 IWM_DBG_TX(iwm, DBG, "REPLY_TX, buf size: %lu\n", buf_size);
227
228 IWM_DBG_TX(iwm, DBG, "Seqnum: %d\n",
229 le16_to_cpu(hdr->sw_hdr.cmd.seq_num));
230 IWM_DBG_TX(iwm, DBG, "\tFrame cnt: %d\n", tx_resp->frame_cnt);
231 IWM_DBG_TX(iwm, DBG, "\tRetry cnt: %d\n",
232 le16_to_cpu(tx_resp->retry_cnt));
233 IWM_DBG_TX(iwm, DBG, "\tSeq ctl: %d\n", le16_to_cpu(tx_resp->seq_ctl));
234 IWM_DBG_TX(iwm, DBG, "\tByte cnt: %d\n",
235 le16_to_cpu(tx_resp->byte_cnt));
236 IWM_DBG_TX(iwm, DBG, "\tStatus: 0x%x\n", le32_to_cpu(tx_resp->status));
237
238 return 0;
239 }
240
241
242 static int iwm_ntf_calib_res(struct iwm_priv *iwm, u8 *buf,
243 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
244 {
245 u8 opcode;
246 u8 *calib_buf;
247 struct iwm_lmac_calib_hdr *hdr = (struct iwm_lmac_calib_hdr *)
248 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
249
250 opcode = hdr->opcode;
251
252 BUG_ON(opcode >= CALIBRATION_CMD_NUM ||
253 opcode < PHY_CALIBRATE_OPCODES_NUM);
254
255 IWM_DBG_NTF(iwm, DBG, "Store calibration result for opcode: %d\n",
256 opcode);
257
258 buf_size -= sizeof(struct iwm_umac_wifi_in_hdr);
259 calib_buf = iwm->calib_res[opcode].buf;
260
261 if (!calib_buf || (iwm->calib_res[opcode].size < buf_size)) {
262 kfree(calib_buf);
263 calib_buf = kzalloc(buf_size, GFP_KERNEL);
264 if (!calib_buf) {
265 IWM_ERR(iwm, "Memory allocation failed: calib_res\n");
266 return -ENOMEM;
267 }
268 iwm->calib_res[opcode].buf = calib_buf;
269 iwm->calib_res[opcode].size = buf_size;
270 }
271
272 memcpy(calib_buf, hdr, buf_size);
273 set_bit(opcode - PHY_CALIBRATE_OPCODES_NUM, &iwm->calib_done_map);
274
275 return 0;
276 }
277
278 static int iwm_ntf_calib_complete(struct iwm_priv *iwm, u8 *buf,
279 unsigned long buf_size,
280 struct iwm_wifi_cmd *cmd)
281 {
282 IWM_DBG_NTF(iwm, DBG, "Calibration completed\n");
283
284 return 0;
285 }
286
287 static int iwm_ntf_calib_cfg(struct iwm_priv *iwm, u8 *buf,
288 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
289 {
290 struct iwm_lmac_cal_cfg_resp *cal_resp;
291
292 cal_resp = (struct iwm_lmac_cal_cfg_resp *)
293 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
294
295 IWM_DBG_NTF(iwm, DBG, "Calibration CFG command status: %d\n",
296 le32_to_cpu(cal_resp->status));
297
298 return 0;
299 }
300
301 static int iwm_ntf_wifi_status(struct iwm_priv *iwm, u8 *buf,
302 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
303 {
304 struct iwm_umac_notif_wifi_status *status =
305 (struct iwm_umac_notif_wifi_status *)buf;
306
307 iwm->core_enabled |= le16_to_cpu(status->status);
308
309 return 0;
310 }
311
312 static struct iwm_rx_ticket_node *
313 iwm_rx_ticket_node_alloc(struct iwm_priv *iwm, struct iwm_rx_ticket *ticket)
314 {
315 struct iwm_rx_ticket_node *ticket_node;
316
317 ticket_node = kzalloc(sizeof(struct iwm_rx_ticket_node), GFP_KERNEL);
318 if (!ticket_node) {
319 IWM_ERR(iwm, "Couldn't allocate ticket node\n");
320 return ERR_PTR(-ENOMEM);
321 }
322
323 ticket_node->ticket = kzalloc(sizeof(struct iwm_rx_ticket), GFP_KERNEL);
324 if (!ticket_node->ticket) {
325 IWM_ERR(iwm, "Couldn't allocate RX ticket\n");
326 kfree(ticket_node);
327 return ERR_PTR(-ENOMEM);
328 }
329
330 memcpy(ticket_node->ticket, ticket, sizeof(struct iwm_rx_ticket));
331 INIT_LIST_HEAD(&ticket_node->node);
332
333 return ticket_node;
334 }
335
336 static void iwm_rx_ticket_node_free(struct iwm_rx_ticket_node *ticket_node)
337 {
338 kfree(ticket_node->ticket);
339 kfree(ticket_node);
340 }
341
342 static struct iwm_rx_packet *iwm_rx_packet_get(struct iwm_priv *iwm, u16 id)
343 {
344 u8 id_hash = IWM_RX_ID_GET_HASH(id);
345 struct list_head *packet_list;
346 struct iwm_rx_packet *packet, *next;
347
348 packet_list = &iwm->rx_packets[id_hash];
349
350 list_for_each_entry_safe(packet, next, packet_list, node)
351 if (packet->id == id)
352 return packet;
353
354 return NULL;
355 }
356
357 static struct iwm_rx_packet *iwm_rx_packet_alloc(struct iwm_priv *iwm, u8 *buf,
358 u32 size, u16 id)
359 {
360 struct iwm_rx_packet *packet;
361
362 packet = kzalloc(sizeof(struct iwm_rx_packet), GFP_KERNEL);
363 if (!packet) {
364 IWM_ERR(iwm, "Couldn't allocate packet\n");
365 return ERR_PTR(-ENOMEM);
366 }
367
368 packet->skb = dev_alloc_skb(size);
369 if (!packet->skb) {
370 IWM_ERR(iwm, "Couldn't allocate packet SKB\n");
371 kfree(packet);
372 return ERR_PTR(-ENOMEM);
373 }
374
375 packet->pkt_size = size;
376
377 skb_put(packet->skb, size);
378 memcpy(packet->skb->data, buf, size);
379 INIT_LIST_HEAD(&packet->node);
380 packet->id = id;
381
382 return packet;
383 }
384
385 void iwm_rx_free(struct iwm_priv *iwm)
386 {
387 struct iwm_rx_ticket_node *ticket, *nt;
388 struct iwm_rx_packet *packet, *np;
389 int i;
390
391 list_for_each_entry_safe(ticket, nt, &iwm->rx_tickets, node) {
392 list_del(&ticket->node);
393 iwm_rx_ticket_node_free(ticket);
394 }
395
396 for (i = 0; i < IWM_RX_ID_HASH; i++) {
397 list_for_each_entry_safe(packet, np, &iwm->rx_packets[i],
398 node) {
399 list_del(&packet->node);
400 kfree_skb(packet->skb);
401 kfree(packet);
402 }
403 }
404 }
405
406 static int iwm_ntf_rx_ticket(struct iwm_priv *iwm, u8 *buf,
407 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
408 {
409 struct iwm_umac_notif_rx_ticket *ntf_rx_ticket =
410 (struct iwm_umac_notif_rx_ticket *)buf;
411 struct iwm_rx_ticket *ticket =
412 (struct iwm_rx_ticket *)ntf_rx_ticket->tickets;
413 int i, schedule_rx = 0;
414
415 for (i = 0; i < ntf_rx_ticket->num_tickets; i++) {
416 struct iwm_rx_ticket_node *ticket_node;
417
418 switch (le16_to_cpu(ticket->action)) {
419 case IWM_RX_TICKET_RELEASE:
420 case IWM_RX_TICKET_DROP:
421 /* We can push the packet to the stack */
422 ticket_node = iwm_rx_ticket_node_alloc(iwm, ticket);
423 if (IS_ERR(ticket_node))
424 return PTR_ERR(ticket_node);
425
426 IWM_DBG_RX(iwm, DBG, "TICKET %s(%d)\n",
427 ticket->action == IWM_RX_TICKET_RELEASE ?
428 "RELEASE" : "DROP",
429 ticket->id);
430 list_add_tail(&ticket_node->node, &iwm->rx_tickets);
431
432 /*
433 * We received an Rx ticket, most likely there's
434 * a packet pending for it, it's not worth going
435 * through the packet hash list to double check.
436 * Let's just fire the rx worker..
437 */
438 schedule_rx = 1;
439
440 break;
441
442 default:
443 IWM_ERR(iwm, "Invalid RX ticket action: 0x%x\n",
444 ticket->action);
445 }
446
447 ticket++;
448 }
449
450 if (schedule_rx)
451 queue_work(iwm->rx_wq, &iwm->rx_worker);
452
453 return 0;
454 }
455
456 static int iwm_ntf_rx_packet(struct iwm_priv *iwm, u8 *buf,
457 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
458 {
459 struct iwm_umac_wifi_in_hdr *wifi_hdr;
460 struct iwm_rx_packet *packet;
461 u16 id, buf_offset;
462 u32 packet_size;
463
464 IWM_DBG_RX(iwm, DBG, "\n");
465
466 wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
467 id = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num);
468 buf_offset = sizeof(struct iwm_umac_wifi_in_hdr);
469 packet_size = buf_size - sizeof(struct iwm_umac_wifi_in_hdr);
470
471 IWM_DBG_RX(iwm, DBG, "CMD:0x%x, seqnum: %d, packet size: %d\n",
472 wifi_hdr->sw_hdr.cmd.cmd, id, packet_size);
473 IWM_DBG_RX(iwm, DBG, "Packet id: %d\n", id);
474 IWM_HEXDUMP(iwm, DBG, RX, "PACKET: ", buf + buf_offset, packet_size);
475
476 packet = iwm_rx_packet_alloc(iwm, buf + buf_offset, packet_size, id);
477 if (IS_ERR(packet))
478 return PTR_ERR(packet);
479
480 list_add_tail(&packet->node, &iwm->rx_packets[IWM_RX_ID_GET_HASH(id)]);
481
482 /* We might (unlikely) have received the packet _after_ the ticket */
483 queue_work(iwm->rx_wq, &iwm->rx_worker);
484
485 return 0;
486 }
487
488 /* MLME handlers */
489 static int iwm_mlme_assoc_start(struct iwm_priv *iwm, u8 *buf,
490 unsigned long buf_size,
491 struct iwm_wifi_cmd *cmd)
492 {
493 struct iwm_umac_notif_assoc_start *start;
494
495 start = (struct iwm_umac_notif_assoc_start *)buf;
496
497 IWM_DBG_MLME(iwm, INFO, "Association with %pM Started, reason: %d\n",
498 start->bssid, le32_to_cpu(start->roam_reason));
499
500 wake_up_interruptible(&iwm->mlme_queue);
501
502 return 0;
503 }
504
505 static u8 iwm_is_open_wep_profile(struct iwm_priv *iwm)
506 {
507 if ((iwm->umac_profile->sec.ucast_cipher == UMAC_CIPHER_TYPE_WEP_40 ||
508 iwm->umac_profile->sec.ucast_cipher == UMAC_CIPHER_TYPE_WEP_104) &&
509 (iwm->umac_profile->sec.ucast_cipher ==
510 iwm->umac_profile->sec.mcast_cipher) &&
511 (iwm->umac_profile->sec.auth_type == UMAC_AUTH_TYPE_OPEN))
512 return 1;
513
514 return 0;
515 }
516
517 static int iwm_mlme_assoc_complete(struct iwm_priv *iwm, u8 *buf,
518 unsigned long buf_size,
519 struct iwm_wifi_cmd *cmd)
520 {
521 struct iwm_umac_notif_assoc_complete *complete =
522 (struct iwm_umac_notif_assoc_complete *)buf;
523
524 IWM_DBG_MLME(iwm, INFO, "Association with %pM completed, status: %d\n",
525 complete->bssid, complete->status);
526
527 switch (le32_to_cpu(complete->status)) {
528 case UMAC_ASSOC_COMPLETE_SUCCESS:
529 set_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
530 memcpy(iwm->bssid, complete->bssid, ETH_ALEN);
531 iwm->channel = complete->channel;
532
533 /* Internal roaming state, avoid notifying SME. */
534 if (!test_and_clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status)
535 && iwm->conf.mode == UMAC_MODE_BSS) {
536 cancel_delayed_work(&iwm->disconnect);
537 cfg80211_roamed(iwm_to_ndev(iwm),
538 complete->bssid,
539 iwm->req_ie, iwm->req_ie_len,
540 iwm->resp_ie, iwm->resp_ie_len,
541 GFP_KERNEL);
542 break;
543 }
544
545 iwm_link_on(iwm);
546
547 if (iwm->conf.mode == UMAC_MODE_IBSS)
548 goto ibss;
549
550 if (!test_bit(IWM_STATUS_RESETTING, &iwm->status))
551 cfg80211_connect_result(iwm_to_ndev(iwm),
552 complete->bssid,
553 iwm->req_ie, iwm->req_ie_len,
554 iwm->resp_ie, iwm->resp_ie_len,
555 WLAN_STATUS_SUCCESS,
556 GFP_KERNEL);
557 else
558 cfg80211_roamed(iwm_to_ndev(iwm),
559 complete->bssid,
560 iwm->req_ie, iwm->req_ie_len,
561 iwm->resp_ie, iwm->resp_ie_len,
562 GFP_KERNEL);
563 break;
564 case UMAC_ASSOC_COMPLETE_FAILURE:
565 clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
566 memset(iwm->bssid, 0, ETH_ALEN);
567 iwm->channel = 0;
568
569 /* Internal roaming state, avoid notifying SME. */
570 if (!test_and_clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status)
571 && iwm->conf.mode == UMAC_MODE_BSS) {
572 cancel_delayed_work(&iwm->disconnect);
573 break;
574 }
575
576 iwm_link_off(iwm);
577
578 if (iwm->conf.mode == UMAC_MODE_IBSS)
579 goto ibss;
580
581 if (!test_bit(IWM_STATUS_RESETTING, &iwm->status))
582 if (!iwm_is_open_wep_profile(iwm)) {
583 cfg80211_connect_result(iwm_to_ndev(iwm),
584 complete->bssid,
585 NULL, 0, NULL, 0,
586 WLAN_STATUS_UNSPECIFIED_FAILURE,
587 GFP_KERNEL);
588 } else {
589 /* Let's try shared WEP auth */
590 IWM_ERR(iwm, "Trying WEP shared auth\n");
591 schedule_work(&iwm->auth_retry_worker);
592 }
593 else
594 cfg80211_disconnected(iwm_to_ndev(iwm), 0, NULL, 0,
595 GFP_KERNEL);
596 break;
597 default:
598 break;
599 }
600
601 clear_bit(IWM_STATUS_RESETTING, &iwm->status);
602 return 0;
603
604 ibss:
605 cfg80211_ibss_joined(iwm_to_ndev(iwm), iwm->bssid, GFP_KERNEL);
606 clear_bit(IWM_STATUS_RESETTING, &iwm->status);
607 return 0;
608 }
609
610 static int iwm_mlme_profile_invalidate(struct iwm_priv *iwm, u8 *buf,
611 unsigned long buf_size,
612 struct iwm_wifi_cmd *cmd)
613 {
614 struct iwm_umac_notif_profile_invalidate *invalid;
615 u32 reason;
616
617 invalid = (struct iwm_umac_notif_profile_invalidate *)buf;
618 reason = le32_to_cpu(invalid->reason);
619
620 IWM_DBG_MLME(iwm, INFO, "Profile Invalidated. Reason: %d\n", reason);
621
622 if (reason != UMAC_PROFILE_INVALID_REQUEST &&
623 test_bit(IWM_STATUS_SME_CONNECTING, &iwm->status))
624 cfg80211_connect_result(iwm_to_ndev(iwm), NULL, NULL, 0, NULL,
625 0, WLAN_STATUS_UNSPECIFIED_FAILURE,
626 GFP_KERNEL);
627
628 clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status);
629 clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
630
631 iwm->umac_profile_active = 0;
632 memset(iwm->bssid, 0, ETH_ALEN);
633 iwm->channel = 0;
634
635 iwm_link_off(iwm);
636
637 wake_up_interruptible(&iwm->mlme_queue);
638
639 return 0;
640 }
641
642 #define IWM_DISCONNECT_INTERVAL (5 * HZ)
643
644 static int iwm_mlme_connection_terminated(struct iwm_priv *iwm, u8 *buf,
645 unsigned long buf_size,
646 struct iwm_wifi_cmd *cmd)
647 {
648 IWM_DBG_MLME(iwm, DBG, "Connection terminated\n");
649
650 schedule_delayed_work(&iwm->disconnect, IWM_DISCONNECT_INTERVAL);
651
652 return 0;
653 }
654
655 static int iwm_mlme_scan_complete(struct iwm_priv *iwm, u8 *buf,
656 unsigned long buf_size,
657 struct iwm_wifi_cmd *cmd)
658 {
659 int ret;
660 struct iwm_umac_notif_scan_complete *scan_complete =
661 (struct iwm_umac_notif_scan_complete *)buf;
662 u32 result = le32_to_cpu(scan_complete->result);
663
664 IWM_DBG_MLME(iwm, INFO, "type:0x%x result:0x%x seq:%d\n",
665 le32_to_cpu(scan_complete->type),
666 le32_to_cpu(scan_complete->result),
667 scan_complete->seq_num);
668
669 if (!test_and_clear_bit(IWM_STATUS_SCANNING, &iwm->status)) {
670 IWM_ERR(iwm, "Scan complete while device not scanning\n");
671 return -EIO;
672 }
673 if (!iwm->scan_request)
674 return 0;
675
676 ret = iwm_cfg80211_inform_bss(iwm);
677
678 cfg80211_scan_done(iwm->scan_request,
679 (result & UMAC_SCAN_RESULT_ABORTED) ? 1 : !!ret);
680 iwm->scan_request = NULL;
681
682 return ret;
683 }
684
685 static int iwm_mlme_update_sta_table(struct iwm_priv *iwm, u8 *buf,
686 unsigned long buf_size,
687 struct iwm_wifi_cmd *cmd)
688 {
689 struct iwm_umac_notif_sta_info *umac_sta =
690 (struct iwm_umac_notif_sta_info *)buf;
691 struct iwm_sta_info *sta;
692 int i;
693
694 switch (le32_to_cpu(umac_sta->opcode)) {
695 case UMAC_OPCODE_ADD_MODIFY:
696 sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
697
698 IWM_DBG_MLME(iwm, INFO, "%s STA: ID = %d, Color = %d, "
699 "addr = %pM, qos = %d\n",
700 sta->valid ? "Modify" : "Add",
701 GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
702 GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
703 umac_sta->mac_addr,
704 umac_sta->flags & UMAC_STA_FLAG_QOS);
705
706 sta->valid = 1;
707 sta->qos = umac_sta->flags & UMAC_STA_FLAG_QOS;
708 sta->color = GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR);
709 memcpy(sta->addr, umac_sta->mac_addr, ETH_ALEN);
710 break;
711 case UMAC_OPCODE_REMOVE:
712 IWM_DBG_MLME(iwm, INFO, "Remove STA: ID = %d, Color = %d, "
713 "addr = %pM\n",
714 GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
715 GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
716 umac_sta->mac_addr);
717
718 sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
719
720 if (!memcmp(sta->addr, umac_sta->mac_addr, ETH_ALEN))
721 sta->valid = 0;
722
723 break;
724 case UMAC_OPCODE_CLEAR_ALL:
725 for (i = 0; i < IWM_STA_TABLE_NUM; i++)
726 iwm->sta_table[i].valid = 0;
727
728 break;
729 default:
730 break;
731 }
732
733 return 0;
734 }
735
736 static int iwm_mlme_medium_lost(struct iwm_priv *iwm, u8 *buf,
737 unsigned long buf_size,
738 struct iwm_wifi_cmd *cmd)
739 {
740 struct wiphy *wiphy = iwm_to_wiphy(iwm);
741
742 IWM_DBG_NTF(iwm, DBG, "WiFi/WiMax coexistence radio is OFF\n");
743
744 wiphy_rfkill_set_hw_state(wiphy, true);
745
746 return 0;
747 }
748
749 static int iwm_mlme_update_bss_table(struct iwm_priv *iwm, u8 *buf,
750 unsigned long buf_size,
751 struct iwm_wifi_cmd *cmd)
752 {
753 struct wiphy *wiphy = iwm_to_wiphy(iwm);
754 struct ieee80211_mgmt *mgmt;
755 struct iwm_umac_notif_bss_info *umac_bss =
756 (struct iwm_umac_notif_bss_info *)buf;
757 struct ieee80211_channel *channel;
758 struct ieee80211_supported_band *band;
759 struct iwm_bss_info *bss, *next;
760 s32 signal;
761 int freq;
762 u16 frame_len = le16_to_cpu(umac_bss->frame_len);
763 size_t bss_len = sizeof(struct iwm_umac_notif_bss_info) + frame_len;
764
765 mgmt = (struct ieee80211_mgmt *)(umac_bss->frame_buf);
766
767 IWM_DBG_MLME(iwm, DBG, "New BSS info entry: %pM\n", mgmt->bssid);
768 IWM_DBG_MLME(iwm, DBG, "\tType: 0x%x\n", le32_to_cpu(umac_bss->type));
769 IWM_DBG_MLME(iwm, DBG, "\tTimestamp: %d\n",
770 le32_to_cpu(umac_bss->timestamp));
771 IWM_DBG_MLME(iwm, DBG, "\tTable Index: %d\n",
772 le16_to_cpu(umac_bss->table_idx));
773 IWM_DBG_MLME(iwm, DBG, "\tBand: %d\n", umac_bss->band);
774 IWM_DBG_MLME(iwm, DBG, "\tChannel: %d\n", umac_bss->channel);
775 IWM_DBG_MLME(iwm, DBG, "\tRSSI: %d\n", umac_bss->rssi);
776 IWM_DBG_MLME(iwm, DBG, "\tFrame Length: %d\n", frame_len);
777
778 list_for_each_entry_safe(bss, next, &iwm->bss_list, node)
779 if (bss->bss->table_idx == umac_bss->table_idx)
780 break;
781
782 if (&bss->node != &iwm->bss_list) {
783 /* Remove the old BSS entry, we will add it back later. */
784 list_del(&bss->node);
785 kfree(bss->bss);
786 } else {
787 /* New BSS entry */
788
789 bss = kzalloc(sizeof(struct iwm_bss_info), GFP_KERNEL);
790 if (!bss) {
791 IWM_ERR(iwm, "Couldn't allocate bss_info\n");
792 return -ENOMEM;
793 }
794 }
795
796 bss->bss = kzalloc(bss_len, GFP_KERNEL);
797 if (!bss) {
798 kfree(bss);
799 IWM_ERR(iwm, "Couldn't allocate bss\n");
800 return -ENOMEM;
801 }
802
803 INIT_LIST_HEAD(&bss->node);
804 memcpy(bss->bss, umac_bss, bss_len);
805
806 if (umac_bss->band == UMAC_BAND_2GHZ)
807 band = wiphy->bands[IEEE80211_BAND_2GHZ];
808 else if (umac_bss->band == UMAC_BAND_5GHZ)
809 band = wiphy->bands[IEEE80211_BAND_5GHZ];
810 else {
811 IWM_ERR(iwm, "Invalid band: %d\n", umac_bss->band);
812 goto err;
813 }
814
815 freq = ieee80211_channel_to_frequency(umac_bss->channel);
816 channel = ieee80211_get_channel(wiphy, freq);
817 signal = umac_bss->rssi * 100;
818
819 bss->cfg_bss = cfg80211_inform_bss_frame(wiphy, channel,
820 mgmt, frame_len,
821 signal, GFP_KERNEL);
822 if (!bss->cfg_bss)
823 goto err;
824
825 list_add_tail(&bss->node, &iwm->bss_list);
826
827 return 0;
828 err:
829 kfree(bss->bss);
830 kfree(bss);
831
832 return -EINVAL;
833 }
834
835 static int iwm_mlme_remove_bss(struct iwm_priv *iwm, u8 *buf,
836 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
837 {
838 struct iwm_umac_notif_bss_removed *bss_rm =
839 (struct iwm_umac_notif_bss_removed *)buf;
840 struct iwm_bss_info *bss, *next;
841 u16 table_idx;
842 int i;
843
844 for (i = 0; i < le32_to_cpu(bss_rm->count); i++) {
845 table_idx = (le16_to_cpu(bss_rm->entries[i])
846 & IWM_BSS_REMOVE_INDEX_MSK);
847 list_for_each_entry_safe(bss, next, &iwm->bss_list, node)
848 if (bss->bss->table_idx == cpu_to_le16(table_idx)) {
849 struct ieee80211_mgmt *mgmt;
850
851 mgmt = (struct ieee80211_mgmt *)
852 (bss->bss->frame_buf);
853 IWM_DBG_MLME(iwm, ERR,
854 "BSS removed: %pM\n",
855 mgmt->bssid);
856 list_del(&bss->node);
857 kfree(bss->bss);
858 kfree(bss);
859 }
860 }
861
862 return 0;
863 }
864
865 static int iwm_mlme_mgt_frame(struct iwm_priv *iwm, u8 *buf,
866 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
867 {
868 struct iwm_umac_notif_mgt_frame *mgt_frame =
869 (struct iwm_umac_notif_mgt_frame *)buf;
870 struct ieee80211_mgmt *mgt = (struct ieee80211_mgmt *)mgt_frame->frame;
871
872 IWM_HEXDUMP(iwm, DBG, MLME, "MGT: ", mgt_frame->frame,
873 le16_to_cpu(mgt_frame->len));
874
875 if (ieee80211_is_assoc_req(mgt->frame_control)) {
876 iwm->req_ie_len = le16_to_cpu(mgt_frame->len)
877 - offsetof(struct ieee80211_mgmt,
878 u.assoc_req.variable);
879 kfree(iwm->req_ie);
880 iwm->req_ie = kmemdup(mgt->u.assoc_req.variable,
881 iwm->req_ie_len, GFP_KERNEL);
882 } else if (ieee80211_is_reassoc_req(mgt->frame_control)) {
883 iwm->req_ie_len = le16_to_cpu(mgt_frame->len)
884 - offsetof(struct ieee80211_mgmt,
885 u.reassoc_req.variable);
886 kfree(iwm->req_ie);
887 iwm->req_ie = kmemdup(mgt->u.reassoc_req.variable,
888 iwm->req_ie_len, GFP_KERNEL);
889 } else if (ieee80211_is_assoc_resp(mgt->frame_control)) {
890 iwm->resp_ie_len = le16_to_cpu(mgt_frame->len)
891 - offsetof(struct ieee80211_mgmt,
892 u.assoc_resp.variable);
893 kfree(iwm->resp_ie);
894 iwm->resp_ie = kmemdup(mgt->u.assoc_resp.variable,
895 iwm->resp_ie_len, GFP_KERNEL);
896 } else if (ieee80211_is_reassoc_resp(mgt->frame_control)) {
897 iwm->resp_ie_len = le16_to_cpu(mgt_frame->len)
898 - offsetof(struct ieee80211_mgmt,
899 u.reassoc_resp.variable);
900 kfree(iwm->resp_ie);
901 iwm->resp_ie = kmemdup(mgt->u.reassoc_resp.variable,
902 iwm->resp_ie_len, GFP_KERNEL);
903 } else {
904 IWM_ERR(iwm, "Unsupported management frame: 0x%x",
905 le16_to_cpu(mgt->frame_control));
906 return 0;
907 }
908
909 return 0;
910 }
911
912 static int iwm_ntf_mlme(struct iwm_priv *iwm, u8 *buf,
913 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
914 {
915 struct iwm_umac_notif_wifi_if *notif =
916 (struct iwm_umac_notif_wifi_if *)buf;
917
918 switch (notif->status) {
919 case WIFI_IF_NTFY_ASSOC_START:
920 return iwm_mlme_assoc_start(iwm, buf, buf_size, cmd);
921 case WIFI_IF_NTFY_ASSOC_COMPLETE:
922 return iwm_mlme_assoc_complete(iwm, buf, buf_size, cmd);
923 case WIFI_IF_NTFY_PROFILE_INVALIDATE_COMPLETE:
924 return iwm_mlme_profile_invalidate(iwm, buf, buf_size, cmd);
925 case WIFI_IF_NTFY_CONNECTION_TERMINATED:
926 return iwm_mlme_connection_terminated(iwm, buf, buf_size, cmd);
927 case WIFI_IF_NTFY_SCAN_COMPLETE:
928 return iwm_mlme_scan_complete(iwm, buf, buf_size, cmd);
929 case WIFI_IF_NTFY_STA_TABLE_CHANGE:
930 return iwm_mlme_update_sta_table(iwm, buf, buf_size, cmd);
931 case WIFI_IF_NTFY_EXTENDED_IE_REQUIRED:
932 IWM_DBG_MLME(iwm, DBG, "Extended IE required\n");
933 break;
934 case WIFI_IF_NTFY_RADIO_PREEMPTION:
935 return iwm_mlme_medium_lost(iwm, buf, buf_size, cmd);
936 case WIFI_IF_NTFY_BSS_TRK_TABLE_CHANGED:
937 return iwm_mlme_update_bss_table(iwm, buf, buf_size, cmd);
938 case WIFI_IF_NTFY_BSS_TRK_ENTRIES_REMOVED:
939 return iwm_mlme_remove_bss(iwm, buf, buf_size, cmd);
940 break;
941 case WIFI_IF_NTFY_MGMT_FRAME:
942 return iwm_mlme_mgt_frame(iwm, buf, buf_size, cmd);
943 case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_START:
944 case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_COMPLETE:
945 case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_START:
946 case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_RESULT:
947 case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_START:
948 case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_COMPLETE:
949 case WIFI_DBG_IF_NTFY_CNCT_ATC_START:
950 case WIFI_DBG_IF_NTFY_COEX_NOTIFICATION:
951 case WIFI_DBG_IF_NTFY_COEX_HANDLE_ENVELOP:
952 case WIFI_DBG_IF_NTFY_COEX_HANDLE_RELEASE_ENVELOP:
953 IWM_DBG_MLME(iwm, DBG, "MLME debug notification: 0x%x\n",
954 notif->status);
955 break;
956 default:
957 IWM_ERR(iwm, "Unhandled notification: 0x%x\n", notif->status);
958 break;
959 }
960
961 return 0;
962 }
963
964 #define IWM_STATS_UPDATE_INTERVAL (2 * HZ)
965
966 static int iwm_ntf_statistics(struct iwm_priv *iwm, u8 *buf,
967 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
968 {
969 struct iwm_umac_notif_stats *stats = (struct iwm_umac_notif_stats *)buf;
970 struct iw_statistics *wstats = &iwm->wstats;
971 u16 max_rate = 0;
972 int i;
973
974 IWM_DBG_MLME(iwm, DBG, "Statistics notification received\n");
975
976 if (test_bit(IWM_STATUS_ASSOCIATED, &iwm->status)) {
977 for (i = 0; i < UMAC_NTF_RATE_SAMPLE_NR; i++) {
978 max_rate = max_t(u16, max_rate,
979 max(le16_to_cpu(stats->tx_rate[i]),
980 le16_to_cpu(stats->rx_rate[i])));
981 }
982 /* UMAC passes rate info multiplies by 2 */
983 iwm->rate = max_rate >> 1;
984 }
985 iwm->txpower = le32_to_cpu(stats->tx_power);
986
987 wstats->status = 0;
988
989 wstats->discard.nwid = le32_to_cpu(stats->rx_drop_other_bssid);
990 wstats->discard.code = le32_to_cpu(stats->rx_drop_decode);
991 wstats->discard.fragment = le32_to_cpu(stats->rx_drop_reassembly);
992 wstats->discard.retries = le32_to_cpu(stats->tx_drop_max_retry);
993
994 wstats->miss.beacon = le32_to_cpu(stats->missed_beacons);
995
996 /* according to cfg80211 */
997 if (stats->rssi_dbm < -110)
998 wstats->qual.qual = 0;
999 else if (stats->rssi_dbm > -40)
1000 wstats->qual.qual = 70;
1001 else
1002 wstats->qual.qual = stats->rssi_dbm + 110;
1003
1004 wstats->qual.level = stats->rssi_dbm;
1005 wstats->qual.noise = stats->noise_dbm;
1006 wstats->qual.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
1007
1008 schedule_delayed_work(&iwm->stats_request, IWM_STATS_UPDATE_INTERVAL);
1009
1010 mod_timer(&iwm->watchdog, round_jiffies(jiffies + IWM_WATCHDOG_PERIOD));
1011
1012 return 0;
1013 }
1014
1015 static int iwm_ntf_eeprom_proxy(struct iwm_priv *iwm, u8 *buf,
1016 unsigned long buf_size,
1017 struct iwm_wifi_cmd *cmd)
1018 {
1019 struct iwm_umac_cmd_eeprom_proxy *eeprom_proxy =
1020 (struct iwm_umac_cmd_eeprom_proxy *)
1021 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1022 struct iwm_umac_cmd_eeprom_proxy_hdr *hdr = &eeprom_proxy->hdr;
1023 u32 hdr_offset = le32_to_cpu(hdr->offset);
1024 u32 hdr_len = le32_to_cpu(hdr->len);
1025 u32 hdr_type = le32_to_cpu(hdr->type);
1026
1027 IWM_DBG_NTF(iwm, DBG, "type: 0x%x, len: %d, offset: 0x%x\n",
1028 hdr_type, hdr_len, hdr_offset);
1029
1030 if ((hdr_offset + hdr_len) > IWM_EEPROM_LEN)
1031 return -EINVAL;
1032
1033 switch (hdr_type) {
1034 case IWM_UMAC_CMD_EEPROM_TYPE_READ:
1035 memcpy(iwm->eeprom + hdr_offset, eeprom_proxy->buf, hdr_len);
1036 break;
1037 case IWM_UMAC_CMD_EEPROM_TYPE_WRITE:
1038 default:
1039 return -ENOTSUPP;
1040 }
1041
1042 return 0;
1043 }
1044
1045 static int iwm_ntf_channel_info_list(struct iwm_priv *iwm, u8 *buf,
1046 unsigned long buf_size,
1047 struct iwm_wifi_cmd *cmd)
1048 {
1049 struct iwm_umac_cmd_get_channel_list *ch_list =
1050 (struct iwm_umac_cmd_get_channel_list *)
1051 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1052 struct wiphy *wiphy = iwm_to_wiphy(iwm);
1053 struct ieee80211_supported_band *band;
1054 int i;
1055
1056 band = wiphy->bands[IEEE80211_BAND_2GHZ];
1057
1058 for (i = 0; i < band->n_channels; i++) {
1059 unsigned long ch_mask_0 =
1060 le32_to_cpu(ch_list->ch[0].channels_mask);
1061 unsigned long ch_mask_2 =
1062 le32_to_cpu(ch_list->ch[2].channels_mask);
1063
1064 if (!test_bit(i, &ch_mask_0))
1065 band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
1066
1067 if (!test_bit(i, &ch_mask_2))
1068 band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
1069 }
1070
1071 band = wiphy->bands[IEEE80211_BAND_5GHZ];
1072
1073 for (i = 0; i < min(band->n_channels, 32); i++) {
1074 unsigned long ch_mask_1 =
1075 le32_to_cpu(ch_list->ch[1].channels_mask);
1076 unsigned long ch_mask_3 =
1077 le32_to_cpu(ch_list->ch[3].channels_mask);
1078
1079 if (!test_bit(i, &ch_mask_1))
1080 band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
1081
1082 if (!test_bit(i, &ch_mask_3))
1083 band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
1084 }
1085
1086 return 0;
1087 }
1088
1089 static int iwm_ntf_stop_resume_tx(struct iwm_priv *iwm, u8 *buf,
1090 unsigned long buf_size,
1091 struct iwm_wifi_cmd *cmd)
1092 {
1093 struct iwm_umac_notif_stop_resume_tx *stp_res_tx =
1094 (struct iwm_umac_notif_stop_resume_tx *)buf;
1095 struct iwm_sta_info *sta_info;
1096 struct iwm_tid_info *tid_info;
1097 u8 sta_id = STA_ID_N_COLOR_ID(stp_res_tx->sta_id);
1098 u16 tid_msk = le16_to_cpu(stp_res_tx->stop_resume_tid_msk);
1099 int bit, ret = 0;
1100 bool stop = false;
1101
1102 IWM_DBG_NTF(iwm, DBG, "stop/resume notification:\n"
1103 "\tflags: 0x%x\n"
1104 "\tSTA id: %d\n"
1105 "\tTID bitmask: 0x%x\n",
1106 stp_res_tx->flags, stp_res_tx->sta_id,
1107 stp_res_tx->stop_resume_tid_msk);
1108
1109 if (stp_res_tx->flags & UMAC_STOP_TX_FLAG)
1110 stop = true;
1111
1112 sta_info = &iwm->sta_table[sta_id];
1113 if (!sta_info->valid) {
1114 IWM_ERR(iwm, "Stoping an invalid STA: %d %d\n",
1115 sta_id, stp_res_tx->sta_id);
1116 return -EINVAL;
1117 }
1118
1119 for_each_bit(bit, (unsigned long *)&tid_msk, IWM_UMAC_TID_NR) {
1120 tid_info = &sta_info->tid_info[bit];
1121
1122 mutex_lock(&tid_info->mutex);
1123 tid_info->stopped = stop;
1124 mutex_unlock(&tid_info->mutex);
1125
1126 if (!stop) {
1127 struct iwm_tx_queue *txq;
1128 int queue = iwm_tid_to_queue(bit);
1129
1130 if (queue < 0)
1131 continue;
1132
1133 txq = &iwm->txq[queue];
1134 /*
1135 * If we resume, we have to move our SKBs
1136 * back to the tx queue and queue some work.
1137 */
1138 spin_lock_bh(&txq->lock);
1139 skb_queue_splice_init(&txq->queue, &txq->stopped_queue);
1140 spin_unlock_bh(&txq->lock);
1141
1142 queue_work(txq->wq, &txq->worker);
1143 }
1144
1145 }
1146
1147 /* We send an ACK only for the stop case */
1148 if (stop)
1149 ret = iwm_send_umac_stop_resume_tx(iwm, stp_res_tx);
1150
1151 return ret;
1152 }
1153
1154 static int iwm_ntf_wifi_if_wrapper(struct iwm_priv *iwm, u8 *buf,
1155 unsigned long buf_size,
1156 struct iwm_wifi_cmd *cmd)
1157 {
1158 struct iwm_umac_wifi_if *hdr;
1159
1160 if (cmd == NULL) {
1161 IWM_ERR(iwm, "Couldn't find expected wifi command\n");
1162 return -EINVAL;
1163 }
1164
1165 hdr = (struct iwm_umac_wifi_if *)cmd->buf.payload;
1166
1167 IWM_DBG_NTF(iwm, DBG, "WIFI_IF_WRAPPER cmd is delivered to UMAC: "
1168 "oid is 0x%x\n", hdr->oid);
1169
1170 if (hdr->oid <= WIFI_IF_NTFY_MAX) {
1171 set_bit(hdr->oid, &iwm->wifi_ntfy[0]);
1172 wake_up_interruptible(&iwm->wifi_ntfy_queue);
1173 } else
1174 return -EINVAL;
1175
1176 switch (hdr->oid) {
1177 case UMAC_WIFI_IF_CMD_SET_PROFILE:
1178 iwm->umac_profile_active = 1;
1179 break;
1180 default:
1181 break;
1182 }
1183
1184 return 0;
1185 }
1186
1187 #define CT_KILL_DELAY (30 * HZ)
1188 static int iwm_ntf_card_state(struct iwm_priv *iwm, u8 *buf,
1189 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
1190 {
1191 struct wiphy *wiphy = iwm_to_wiphy(iwm);
1192 struct iwm_lmac_card_state *state = (struct iwm_lmac_card_state *)
1193 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1194 u32 flags = le32_to_cpu(state->flags);
1195
1196 IWM_INFO(iwm, "HW RF Kill %s, CT Kill %s\n",
1197 flags & IWM_CARD_STATE_HW_DISABLED ? "ON" : "OFF",
1198 flags & IWM_CARD_STATE_CTKILL_DISABLED ? "ON" : "OFF");
1199
1200 if (flags & IWM_CARD_STATE_CTKILL_DISABLED) {
1201 /*
1202 * We got a CTKILL event: We bring the interface down in
1203 * oder to cool the device down, and try to bring it up
1204 * 30 seconds later. If it's still too hot, we'll go through
1205 * this code path again.
1206 */
1207 cancel_delayed_work_sync(&iwm->ct_kill_delay);
1208 schedule_delayed_work(&iwm->ct_kill_delay, CT_KILL_DELAY);
1209 }
1210
1211 wiphy_rfkill_set_hw_state(wiphy, flags &
1212 (IWM_CARD_STATE_HW_DISABLED |
1213 IWM_CARD_STATE_CTKILL_DISABLED));
1214
1215 return 0;
1216 }
1217
1218 static int iwm_rx_handle_wifi(struct iwm_priv *iwm, u8 *buf,
1219 unsigned long buf_size)
1220 {
1221 struct iwm_umac_wifi_in_hdr *wifi_hdr;
1222 struct iwm_wifi_cmd *cmd;
1223 u8 source, cmd_id;
1224 u16 seq_num;
1225 u32 count;
1226 u8 resp;
1227
1228 wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
1229 cmd_id = wifi_hdr->sw_hdr.cmd.cmd;
1230
1231 source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE);
1232 if (source >= IWM_SRC_NUM) {
1233 IWM_CRIT(iwm, "invalid source %d\n", source);
1234 return -EINVAL;
1235 }
1236
1237 count = (GET_VAL32(wifi_hdr->sw_hdr.meta_data, UMAC_FW_CMD_BYTE_COUNT));
1238 count += sizeof(struct iwm_umac_wifi_in_hdr) -
1239 sizeof(struct iwm_dev_cmd_hdr);
1240 if (count > buf_size) {
1241 IWM_CRIT(iwm, "count %d, buf size:%ld\n", count, buf_size);
1242 return -EINVAL;
1243 }
1244
1245 resp = GET_VAL32(wifi_hdr->sw_hdr.meta_data, UMAC_FW_CMD_STATUS);
1246
1247 seq_num = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num);
1248
1249 IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x, seqnum: %d\n",
1250 cmd_id, source, seq_num);
1251
1252 /*
1253 * If this is a response to a previously sent command, there must
1254 * be a pending command for this sequence number.
1255 */
1256 cmd = iwm_get_pending_wifi_cmd(iwm, seq_num);
1257
1258 /* Notify the caller only for sync commands. */
1259 switch (source) {
1260 case UMAC_HDI_IN_SOURCE_FHRX:
1261 if (iwm->lmac_handlers[cmd_id] &&
1262 test_bit(cmd_id, &iwm->lmac_handler_map[0]))
1263 return iwm_notif_send(iwm, cmd, cmd_id, source,
1264 buf, count);
1265 break;
1266 case UMAC_HDI_IN_SOURCE_FW:
1267 if (iwm->umac_handlers[cmd_id] &&
1268 test_bit(cmd_id, &iwm->umac_handler_map[0]))
1269 return iwm_notif_send(iwm, cmd, cmd_id, source,
1270 buf, count);
1271 break;
1272 case UMAC_HDI_IN_SOURCE_UDMA:
1273 break;
1274 }
1275
1276 return iwm_rx_handle_resp(iwm, buf, count, cmd);
1277 }
1278
1279 int iwm_rx_handle_resp(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size,
1280 struct iwm_wifi_cmd *cmd)
1281 {
1282 u8 source, cmd_id;
1283 struct iwm_umac_wifi_in_hdr *wifi_hdr;
1284 int ret = 0;
1285
1286 wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
1287 cmd_id = wifi_hdr->sw_hdr.cmd.cmd;
1288
1289 source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE);
1290
1291 IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x\n", cmd_id, source);
1292
1293 switch (source) {
1294 case UMAC_HDI_IN_SOURCE_FHRX:
1295 if (iwm->lmac_handlers[cmd_id])
1296 ret = iwm->lmac_handlers[cmd_id]
1297 (iwm, buf, buf_size, cmd);
1298 break;
1299 case UMAC_HDI_IN_SOURCE_FW:
1300 if (iwm->umac_handlers[cmd_id])
1301 ret = iwm->umac_handlers[cmd_id]
1302 (iwm, buf, buf_size, cmd);
1303 break;
1304 case UMAC_HDI_IN_SOURCE_UDMA:
1305 ret = -EINVAL;
1306 break;
1307 }
1308
1309 kfree(cmd);
1310
1311 return ret;
1312 }
1313
1314 static int iwm_rx_handle_nonwifi(struct iwm_priv *iwm, u8 *buf,
1315 unsigned long buf_size)
1316 {
1317 u8 seq_num;
1318 struct iwm_udma_in_hdr *hdr = (struct iwm_udma_in_hdr *)buf;
1319 struct iwm_nonwifi_cmd *cmd, *next;
1320
1321 seq_num = GET_VAL32(hdr->cmd, UDMA_HDI_IN_CMD_NON_WIFI_HW_SEQ_NUM);
1322
1323 /*
1324 * We received a non wifi answer.
1325 * Let's check if there's a pending command for it, and if so
1326 * replace the command payload with the buffer, and then wake the
1327 * callers up.
1328 * That means we only support synchronised non wifi command response
1329 * schemes.
1330 */
1331 list_for_each_entry_safe(cmd, next, &iwm->nonwifi_pending_cmd, pending)
1332 if (cmd->seq_num == seq_num) {
1333 cmd->resp_received = 1;
1334 cmd->buf.len = buf_size;
1335 memcpy(cmd->buf.hdr, buf, buf_size);
1336 wake_up_interruptible(&iwm->nonwifi_queue);
1337 }
1338
1339 return 0;
1340 }
1341
1342 static int iwm_rx_handle_umac(struct iwm_priv *iwm, u8 *buf,
1343 unsigned long buf_size)
1344 {
1345 int ret = 0;
1346 u8 op_code;
1347 unsigned long buf_offset = 0;
1348 struct iwm_udma_in_hdr *hdr;
1349
1350 /*
1351 * To allow for a more efficient bus usage, UMAC
1352 * messages are encapsulated into UDMA ones. This
1353 * way we can have several UMAC messages in one bus
1354 * transfer.
1355 * A UDMA frame size is always aligned on 16 bytes,
1356 * and a UDMA frame must not start with a UMAC_PAD_TERMINAL
1357 * word. This is how we parse a bus frame into several
1358 * UDMA ones.
1359 */
1360 while (buf_offset < buf_size) {
1361
1362 hdr = (struct iwm_udma_in_hdr *)(buf + buf_offset);
1363
1364 if (iwm_rx_check_udma_hdr(hdr) < 0) {
1365 IWM_DBG_RX(iwm, DBG, "End of frame\n");
1366 break;
1367 }
1368
1369 op_code = GET_VAL32(hdr->cmd, UMAC_HDI_IN_CMD_OPCODE);
1370
1371 IWM_DBG_RX(iwm, DBG, "Op code: 0x%x\n", op_code);
1372
1373 if (op_code == UMAC_HDI_IN_OPCODE_WIFI) {
1374 ret |= iwm_rx_handle_wifi(iwm, buf + buf_offset,
1375 buf_size - buf_offset);
1376 } else if (op_code < UMAC_HDI_IN_OPCODE_NONWIFI_MAX) {
1377 if (GET_VAL32(hdr->cmd,
1378 UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) !=
1379 UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) {
1380 IWM_ERR(iwm, "Incorrect hw signature\n");
1381 return -EINVAL;
1382 }
1383 ret |= iwm_rx_handle_nonwifi(iwm, buf + buf_offset,
1384 buf_size - buf_offset);
1385 } else {
1386 IWM_ERR(iwm, "Invalid RX opcode: 0x%x\n", op_code);
1387 ret |= -EINVAL;
1388 }
1389
1390 buf_offset += iwm_rx_resp_size(hdr);
1391 }
1392
1393 return ret;
1394 }
1395
1396 int iwm_rx_handle(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size)
1397 {
1398 struct iwm_udma_in_hdr *hdr;
1399
1400 hdr = (struct iwm_udma_in_hdr *)buf;
1401
1402 switch (le32_to_cpu(hdr->cmd)) {
1403 case UMAC_REBOOT_BARKER:
1404 if (test_bit(IWM_STATUS_READY, &iwm->status)) {
1405 IWM_ERR(iwm, "Unexpected BARKER\n");
1406
1407 schedule_work(&iwm->reset_worker);
1408
1409 return 0;
1410 }
1411
1412 return iwm_notif_send(iwm, NULL, IWM_BARKER_REBOOT_NOTIFICATION,
1413 IWM_SRC_UDMA, buf, buf_size);
1414 case UMAC_ACK_BARKER:
1415 return iwm_notif_send(iwm, NULL, IWM_ACK_BARKER_NOTIFICATION,
1416 IWM_SRC_UDMA, NULL, 0);
1417 default:
1418 IWM_DBG_RX(iwm, DBG, "Received cmd: 0x%x\n", hdr->cmd);
1419 return iwm_rx_handle_umac(iwm, buf, buf_size);
1420 }
1421
1422 return 0;
1423 }
1424
1425 static const iwm_handler iwm_umac_handlers[] =
1426 {
1427 [UMAC_NOTIFY_OPCODE_ERROR] = iwm_ntf_error,
1428 [UMAC_NOTIFY_OPCODE_ALIVE] = iwm_ntf_umac_alive,
1429 [UMAC_NOTIFY_OPCODE_INIT_COMPLETE] = iwm_ntf_init_complete,
1430 [UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS] = iwm_ntf_wifi_status,
1431 [UMAC_NOTIFY_OPCODE_WIFI_IF_WRAPPER] = iwm_ntf_mlme,
1432 [UMAC_NOTIFY_OPCODE_PAGE_DEALLOC] = iwm_ntf_tx_credit_update,
1433 [UMAC_NOTIFY_OPCODE_RX_TICKET] = iwm_ntf_rx_ticket,
1434 [UMAC_CMD_OPCODE_RESET] = iwm_ntf_umac_reset,
1435 [UMAC_NOTIFY_OPCODE_STATS] = iwm_ntf_statistics,
1436 [UMAC_CMD_OPCODE_EEPROM_PROXY] = iwm_ntf_eeprom_proxy,
1437 [UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST] = iwm_ntf_channel_info_list,
1438 [UMAC_CMD_OPCODE_STOP_RESUME_STA_TX] = iwm_ntf_stop_resume_tx,
1439 [REPLY_RX_MPDU_CMD] = iwm_ntf_rx_packet,
1440 [UMAC_CMD_OPCODE_WIFI_IF_WRAPPER] = iwm_ntf_wifi_if_wrapper,
1441 };
1442
1443 static const iwm_handler iwm_lmac_handlers[] =
1444 {
1445 [REPLY_TX] = iwm_ntf_tx,
1446 [REPLY_ALIVE] = iwm_ntf_lmac_version,
1447 [CALIBRATION_RES_NOTIFICATION] = iwm_ntf_calib_res,
1448 [CALIBRATION_COMPLETE_NOTIFICATION] = iwm_ntf_calib_complete,
1449 [CALIBRATION_CFG_CMD] = iwm_ntf_calib_cfg,
1450 [REPLY_RX_MPDU_CMD] = iwm_ntf_rx_packet,
1451 [CARD_STATE_NOTIFICATION] = iwm_ntf_card_state,
1452 };
1453
1454 void iwm_rx_setup_handlers(struct iwm_priv *iwm)
1455 {
1456 iwm->umac_handlers = (iwm_handler *) iwm_umac_handlers;
1457 iwm->lmac_handlers = (iwm_handler *) iwm_lmac_handlers;
1458 }
1459
1460 static void iwm_remove_iv(struct sk_buff *skb, u32 hdr_total_len)
1461 {
1462 struct ieee80211_hdr *hdr;
1463 unsigned int hdr_len;
1464
1465 hdr = (struct ieee80211_hdr *)skb->data;
1466
1467 if (!ieee80211_has_protected(hdr->frame_control))
1468 return;
1469
1470 hdr_len = ieee80211_hdrlen(hdr->frame_control);
1471 if (hdr_total_len <= hdr_len)
1472 return;
1473
1474 memmove(skb->data + (hdr_total_len - hdr_len), skb->data, hdr_len);
1475 skb_pull(skb, (hdr_total_len - hdr_len));
1476 }
1477
1478 static void iwm_rx_adjust_packet(struct iwm_priv *iwm,
1479 struct iwm_rx_packet *packet,
1480 struct iwm_rx_ticket_node *ticket_node)
1481 {
1482 u32 payload_offset = 0, payload_len;
1483 struct iwm_rx_ticket *ticket = ticket_node->ticket;
1484 struct iwm_rx_mpdu_hdr *mpdu_hdr;
1485 struct ieee80211_hdr *hdr;
1486
1487 mpdu_hdr = (struct iwm_rx_mpdu_hdr *)packet->skb->data;
1488 payload_offset += sizeof(struct iwm_rx_mpdu_hdr);
1489 /* Padding is 0 or 2 bytes */
1490 payload_len = le16_to_cpu(mpdu_hdr->len) +
1491 (le16_to_cpu(ticket->flags) & IWM_RX_TICKET_PAD_SIZE_MSK);
1492 payload_len -= ticket->tail_len;
1493
1494 IWM_DBG_RX(iwm, DBG, "Packet adjusted, len:%d, offset:%d, "
1495 "ticket offset:%d ticket tail len:%d\n",
1496 payload_len, payload_offset, ticket->payload_offset,
1497 ticket->tail_len);
1498
1499 IWM_HEXDUMP(iwm, DBG, RX, "RAW: ", packet->skb->data, packet->skb->len);
1500
1501 skb_pull(packet->skb, payload_offset);
1502 skb_trim(packet->skb, payload_len);
1503
1504 iwm_remove_iv(packet->skb, ticket->payload_offset);
1505
1506 hdr = (struct ieee80211_hdr *) packet->skb->data;
1507 if (ieee80211_is_data_qos(hdr->frame_control)) {
1508 /* UMAC handed QOS_DATA frame with 2 padding bytes appended
1509 * to the qos_ctl field in IEEE 802.11 headers. */
1510 memmove(packet->skb->data + IEEE80211_QOS_CTL_LEN + 2,
1511 packet->skb->data,
1512 ieee80211_hdrlen(hdr->frame_control) -
1513 IEEE80211_QOS_CTL_LEN);
1514 hdr = (struct ieee80211_hdr *) skb_pull(packet->skb,
1515 IEEE80211_QOS_CTL_LEN + 2);
1516 hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
1517 }
1518
1519 IWM_HEXDUMP(iwm, DBG, RX, "ADJUSTED: ",
1520 packet->skb->data, packet->skb->len);
1521 }
1522
1523 static void classify8023(struct sk_buff *skb)
1524 {
1525 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1526
1527 if (ieee80211_is_data_qos(hdr->frame_control)) {
1528 u8 *qc = ieee80211_get_qos_ctl(hdr);
1529 /* frame has qos control */
1530 skb->priority = *qc & IEEE80211_QOS_CTL_TID_MASK;
1531 } else {
1532 skb->priority = 0;
1533 }
1534 }
1535
1536 static void iwm_rx_process_amsdu(struct iwm_priv *iwm, struct sk_buff *skb)
1537 {
1538 struct wireless_dev *wdev = iwm_to_wdev(iwm);
1539 struct net_device *ndev = iwm_to_ndev(iwm);
1540 struct sk_buff_head list;
1541 struct sk_buff *frame;
1542
1543 IWM_HEXDUMP(iwm, DBG, RX, "A-MSDU: ", skb->data, skb->len);
1544
1545 __skb_queue_head_init(&list);
1546 ieee80211_amsdu_to_8023s(skb, &list, ndev->dev_addr, wdev->iftype, 0);
1547
1548 while ((frame = __skb_dequeue(&list))) {
1549 ndev->stats.rx_packets++;
1550 ndev->stats.rx_bytes += frame->len;
1551
1552 frame->protocol = eth_type_trans(frame, ndev);
1553 frame->ip_summed = CHECKSUM_NONE;
1554 memset(frame->cb, 0, sizeof(frame->cb));
1555
1556 if (netif_rx_ni(frame) == NET_RX_DROP) {
1557 IWM_ERR(iwm, "Packet dropped\n");
1558 ndev->stats.rx_dropped++;
1559 }
1560 }
1561 }
1562
1563 static void iwm_rx_process_packet(struct iwm_priv *iwm,
1564 struct iwm_rx_packet *packet,
1565 struct iwm_rx_ticket_node *ticket_node)
1566 {
1567 int ret;
1568 struct sk_buff *skb = packet->skb;
1569 struct wireless_dev *wdev = iwm_to_wdev(iwm);
1570 struct net_device *ndev = iwm_to_ndev(iwm);
1571
1572 IWM_DBG_RX(iwm, DBG, "Processing packet ID %d\n", packet->id);
1573
1574 switch (le16_to_cpu(ticket_node->ticket->action)) {
1575 case IWM_RX_TICKET_RELEASE:
1576 IWM_DBG_RX(iwm, DBG, "RELEASE packet\n");
1577
1578 iwm_rx_adjust_packet(iwm, packet, ticket_node);
1579 skb->dev = iwm_to_ndev(iwm);
1580 classify8023(skb);
1581
1582 if (le16_to_cpu(ticket_node->ticket->flags) &
1583 IWM_RX_TICKET_AMSDU_MSK) {
1584 iwm_rx_process_amsdu(iwm, skb);
1585 break;
1586 }
1587
1588 ret = ieee80211_data_to_8023(skb, ndev->dev_addr, wdev->iftype);
1589 if (ret < 0) {
1590 IWM_DBG_RX(iwm, DBG, "Couldn't convert 802.11 header - "
1591 "%d\n", ret);
1592 kfree_skb(packet->skb);
1593 break;
1594 }
1595
1596 IWM_HEXDUMP(iwm, DBG, RX, "802.3: ", skb->data, skb->len);
1597
1598 ndev->stats.rx_packets++;
1599 ndev->stats.rx_bytes += skb->len;
1600
1601 skb->protocol = eth_type_trans(skb, ndev);
1602 skb->ip_summed = CHECKSUM_NONE;
1603 memset(skb->cb, 0, sizeof(skb->cb));
1604
1605 if (netif_rx_ni(skb) == NET_RX_DROP) {
1606 IWM_ERR(iwm, "Packet dropped\n");
1607 ndev->stats.rx_dropped++;
1608 }
1609 break;
1610 case IWM_RX_TICKET_DROP:
1611 IWM_DBG_RX(iwm, DBG, "DROP packet: 0x%x\n",
1612 le16_to_cpu(ticket_node->ticket->flags));
1613 kfree_skb(packet->skb);
1614 break;
1615 default:
1616 IWM_ERR(iwm, "Unknown ticket action: %d\n",
1617 le16_to_cpu(ticket_node->ticket->action));
1618 kfree_skb(packet->skb);
1619 }
1620
1621 kfree(packet);
1622 iwm_rx_ticket_node_free(ticket_node);
1623 }
1624
1625 /*
1626 * Rx data processing:
1627 *
1628 * We're receiving Rx packet from the LMAC, and Rx ticket from
1629 * the UMAC.
1630 * To forward a target data packet upstream (i.e. to the
1631 * kernel network stack), we must have received an Rx ticket
1632 * that tells us we're allowed to release this packet (ticket
1633 * action is IWM_RX_TICKET_RELEASE). The Rx ticket also indicates,
1634 * among other things, where valid data actually starts in the Rx
1635 * packet.
1636 */
1637 void iwm_rx_worker(struct work_struct *work)
1638 {
1639 struct iwm_priv *iwm;
1640 struct iwm_rx_ticket_node *ticket, *next;
1641
1642 iwm = container_of(work, struct iwm_priv, rx_worker);
1643
1644 /*
1645 * We go through the tickets list and if there is a pending
1646 * packet for it, we push it upstream.
1647 * We stop whenever a ticket is missing its packet, as we're
1648 * supposed to send the packets in order.
1649 */
1650 list_for_each_entry_safe(ticket, next, &iwm->rx_tickets, node) {
1651 struct iwm_rx_packet *packet =
1652 iwm_rx_packet_get(iwm, le16_to_cpu(ticket->ticket->id));
1653
1654 if (!packet) {
1655 IWM_DBG_RX(iwm, DBG, "Skip rx_work: Wait for ticket %d "
1656 "to be handled first\n",
1657 le16_to_cpu(ticket->ticket->id));
1658 return;
1659 }
1660
1661 list_del(&ticket->node);
1662 list_del(&packet->node);
1663 iwm_rx_process_packet(iwm, packet, ticket);
1664 }
1665 }
1666
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree