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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[mirror_ubuntu-bionic-kernel.git] / drivers / net / wireless / iwmc3200wifi / rx.c
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 <linux/slab.h>
48 #include <net/iw_handler.h>
49
50 #include "iwm.h"
51 #include "debug.h"
52 #include "hal.h"
53 #include "umac.h"
54 #include "lmac.h"
55 #include "commands.h"
56 #include "rx.h"
57 #include "cfg80211.h"
58 #include "eeprom.h"
59
60 static int iwm_rx_check_udma_hdr(struct iwm_udma_in_hdr *hdr)
61 {
62 if ((le32_to_cpu(hdr->cmd) == UMAC_PAD_TERMINAL) ||
63 (le32_to_cpu(hdr->size) == UMAC_PAD_TERMINAL))
64 return -EINVAL;
65
66 return 0;
67 }
68
69 static inline int iwm_rx_resp_size(struct iwm_udma_in_hdr *hdr)
70 {
71 return ALIGN(le32_to_cpu(hdr->size) + sizeof(struct iwm_udma_in_hdr),
72 16);
73 }
74
75 /*
76 * Notification handlers:
77 *
78 * For every possible notification we can receive from the
79 * target, we have a handler.
80 * When we get a target notification, and there is no one
81 * waiting for it, it's just processed through the rx code
82 * path:
83 *
84 * iwm_rx_handle()
85 * -> iwm_rx_handle_umac()
86 * -> iwm_rx_handle_wifi()
87 * -> iwm_rx_handle_resp()
88 * -> iwm_ntf_*()
89 *
90 * OR
91 *
92 * -> iwm_rx_handle_non_wifi()
93 *
94 * If there are processes waiting for this notification, then
95 * iwm_rx_handle_wifi() just wakes those processes up and they
96 * grab the pending notification.
97 */
98 static int iwm_ntf_error(struct iwm_priv *iwm, u8 *buf,
99 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
100 {
101 struct iwm_umac_notif_error *error;
102 struct iwm_fw_error_hdr *fw_err;
103
104 error = (struct iwm_umac_notif_error *)buf;
105 fw_err = &error->err;
106
107 memcpy(iwm->last_fw_err, fw_err, sizeof(struct iwm_fw_error_hdr));
108
109 IWM_ERR(iwm, "%cMAC FW ERROR:\n",
110 (le32_to_cpu(fw_err->category) == UMAC_SYS_ERR_CAT_LMAC) ? 'L' : 'U');
111 IWM_ERR(iwm, "\tCategory: %d\n", le32_to_cpu(fw_err->category));
112 IWM_ERR(iwm, "\tStatus: 0x%x\n", le32_to_cpu(fw_err->status));
113 IWM_ERR(iwm, "\tPC: 0x%x\n", le32_to_cpu(fw_err->pc));
114 IWM_ERR(iwm, "\tblink1: %d\n", le32_to_cpu(fw_err->blink1));
115 IWM_ERR(iwm, "\tblink2: %d\n", le32_to_cpu(fw_err->blink2));
116 IWM_ERR(iwm, "\tilink1: %d\n", le32_to_cpu(fw_err->ilink1));
117 IWM_ERR(iwm, "\tilink2: %d\n", le32_to_cpu(fw_err->ilink2));
118 IWM_ERR(iwm, "\tData1: 0x%x\n", le32_to_cpu(fw_err->data1));
119 IWM_ERR(iwm, "\tData2: 0x%x\n", le32_to_cpu(fw_err->data2));
120 IWM_ERR(iwm, "\tLine number: %d\n", le32_to_cpu(fw_err->line_num));
121 IWM_ERR(iwm, "\tUMAC status: 0x%x\n", le32_to_cpu(fw_err->umac_status));
122 IWM_ERR(iwm, "\tLMAC status: 0x%x\n", le32_to_cpu(fw_err->lmac_status));
123 IWM_ERR(iwm, "\tSDIO status: 0x%x\n", le32_to_cpu(fw_err->sdio_status));
124
125 iwm_resetting(iwm);
126
127 return 0;
128 }
129
130 static int iwm_ntf_umac_alive(struct iwm_priv *iwm, u8 *buf,
131 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
132 {
133 struct iwm_umac_notif_alive *alive_resp =
134 (struct iwm_umac_notif_alive *)(buf);
135 u16 status = le16_to_cpu(alive_resp->status);
136
137 if (status == UMAC_NTFY_ALIVE_STATUS_ERR) {
138 IWM_ERR(iwm, "Receive error UMAC_ALIVE\n");
139 return -EIO;
140 }
141
142 iwm_tx_credit_init_pools(iwm, alive_resp);
143
144 return 0;
145 }
146
147 static int iwm_ntf_init_complete(struct iwm_priv *iwm, u8 *buf,
148 unsigned long buf_size,
149 struct iwm_wifi_cmd *cmd)
150 {
151 struct wiphy *wiphy = iwm_to_wiphy(iwm);
152 struct iwm_umac_notif_init_complete *init_complete =
153 (struct iwm_umac_notif_init_complete *)(buf);
154 u16 status = le16_to_cpu(init_complete->status);
155 bool blocked = (status == UMAC_NTFY_INIT_COMPLETE_STATUS_ERR);
156
157 if (blocked)
158 IWM_DBG_NTF(iwm, DBG, "Hardware rf kill is on (radio off)\n");
159 else
160 IWM_DBG_NTF(iwm, DBG, "Hardware rf kill is off (radio on)\n");
161
162 wiphy_rfkill_set_hw_state(wiphy, blocked);
163
164 return 0;
165 }
166
167 static int iwm_ntf_tx_credit_update(struct iwm_priv *iwm, u8 *buf,
168 unsigned long buf_size,
169 struct iwm_wifi_cmd *cmd)
170 {
171 int pool_nr, total_freed_pages;
172 unsigned long pool_map;
173 int i, id;
174 struct iwm_umac_notif_page_dealloc *dealloc =
175 (struct iwm_umac_notif_page_dealloc *)buf;
176
177 pool_nr = GET_VAL32(dealloc->changes, UMAC_DEALLOC_NTFY_CHANGES_CNT);
178 pool_map = GET_VAL32(dealloc->changes, UMAC_DEALLOC_NTFY_CHANGES_MSK);
179
180 IWM_DBG_TX(iwm, DBG, "UMAC dealloc notification: pool nr %d, "
181 "update map 0x%lx\n", pool_nr, pool_map);
182
183 spin_lock(&iwm->tx_credit.lock);
184
185 for (i = 0; i < pool_nr; i++) {
186 id = GET_VAL32(dealloc->grp_info[i],
187 UMAC_DEALLOC_NTFY_GROUP_NUM);
188 if (test_bit(id, &pool_map)) {
189 total_freed_pages = GET_VAL32(dealloc->grp_info[i],
190 UMAC_DEALLOC_NTFY_PAGE_CNT);
191 iwm_tx_credit_inc(iwm, id, total_freed_pages);
192 }
193 }
194
195 spin_unlock(&iwm->tx_credit.lock);
196
197 return 0;
198 }
199
200 static int iwm_ntf_umac_reset(struct iwm_priv *iwm, u8 *buf,
201 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
202 {
203 IWM_DBG_NTF(iwm, DBG, "UMAC RESET done\n");
204
205 return 0;
206 }
207
208 static int iwm_ntf_lmac_version(struct iwm_priv *iwm, u8 *buf,
209 unsigned long buf_size,
210 struct iwm_wifi_cmd *cmd)
211 {
212 IWM_DBG_NTF(iwm, INFO, "LMAC Version: %x.%x\n", buf[9], buf[8]);
213
214 return 0;
215 }
216
217 static int iwm_ntf_tx(struct iwm_priv *iwm, u8 *buf,
218 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
219 {
220 struct iwm_lmac_tx_resp *tx_resp;
221 struct iwm_umac_wifi_in_hdr *hdr;
222
223 tx_resp = (struct iwm_lmac_tx_resp *)
224 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
225 hdr = (struct iwm_umac_wifi_in_hdr *)buf;
226
227 IWM_DBG_TX(iwm, DBG, "REPLY_TX, buf size: %lu\n", buf_size);
228
229 IWM_DBG_TX(iwm, DBG, "Seqnum: %d\n",
230 le16_to_cpu(hdr->sw_hdr.cmd.seq_num));
231 IWM_DBG_TX(iwm, DBG, "\tFrame cnt: %d\n", tx_resp->frame_cnt);
232 IWM_DBG_TX(iwm, DBG, "\tRetry cnt: %d\n",
233 le16_to_cpu(tx_resp->retry_cnt));
234 IWM_DBG_TX(iwm, DBG, "\tSeq ctl: %d\n", le16_to_cpu(tx_resp->seq_ctl));
235 IWM_DBG_TX(iwm, DBG, "\tByte cnt: %d\n",
236 le16_to_cpu(tx_resp->byte_cnt));
237 IWM_DBG_TX(iwm, DBG, "\tStatus: 0x%x\n", le32_to_cpu(tx_resp->status));
238
239 return 0;
240 }
241
242
243 static int iwm_ntf_calib_res(struct iwm_priv *iwm, u8 *buf,
244 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
245 {
246 u8 opcode;
247 u8 *calib_buf;
248 struct iwm_lmac_calib_hdr *hdr = (struct iwm_lmac_calib_hdr *)
249 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
250
251 opcode = hdr->opcode;
252
253 BUG_ON(opcode >= CALIBRATION_CMD_NUM ||
254 opcode < PHY_CALIBRATE_OPCODES_NUM);
255
256 IWM_DBG_NTF(iwm, DBG, "Store calibration result for opcode: %d\n",
257 opcode);
258
259 buf_size -= sizeof(struct iwm_umac_wifi_in_hdr);
260 calib_buf = iwm->calib_res[opcode].buf;
261
262 if (!calib_buf || (iwm->calib_res[opcode].size < buf_size)) {
263 kfree(calib_buf);
264 calib_buf = kzalloc(buf_size, GFP_KERNEL);
265 if (!calib_buf) {
266 IWM_ERR(iwm, "Memory allocation failed: calib_res\n");
267 return -ENOMEM;
268 }
269 iwm->calib_res[opcode].buf = calib_buf;
270 iwm->calib_res[opcode].size = buf_size;
271 }
272
273 memcpy(calib_buf, hdr, buf_size);
274 set_bit(opcode - PHY_CALIBRATE_OPCODES_NUM, &iwm->calib_done_map);
275
276 return 0;
277 }
278
279 static int iwm_ntf_calib_complete(struct iwm_priv *iwm, u8 *buf,
280 unsigned long buf_size,
281 struct iwm_wifi_cmd *cmd)
282 {
283 IWM_DBG_NTF(iwm, DBG, "Calibration completed\n");
284
285 return 0;
286 }
287
288 static int iwm_ntf_calib_cfg(struct iwm_priv *iwm, u8 *buf,
289 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
290 {
291 struct iwm_lmac_cal_cfg_resp *cal_resp;
292
293 cal_resp = (struct iwm_lmac_cal_cfg_resp *)
294 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
295
296 IWM_DBG_NTF(iwm, DBG, "Calibration CFG command status: %d\n",
297 le32_to_cpu(cal_resp->status));
298
299 return 0;
300 }
301
302 static int iwm_ntf_wifi_status(struct iwm_priv *iwm, u8 *buf,
303 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
304 {
305 struct iwm_umac_notif_wifi_status *status =
306 (struct iwm_umac_notif_wifi_status *)buf;
307
308 iwm->core_enabled |= le16_to_cpu(status->status);
309
310 return 0;
311 }
312
313 static struct iwm_rx_ticket_node *
314 iwm_rx_ticket_node_alloc(struct iwm_priv *iwm, struct iwm_rx_ticket *ticket)
315 {
316 struct iwm_rx_ticket_node *ticket_node;
317
318 ticket_node = kzalloc(sizeof(struct iwm_rx_ticket_node), GFP_KERNEL);
319 if (!ticket_node) {
320 IWM_ERR(iwm, "Couldn't allocate ticket node\n");
321 return ERR_PTR(-ENOMEM);
322 }
323
324 ticket_node->ticket = kzalloc(sizeof(struct iwm_rx_ticket), GFP_KERNEL);
325 if (!ticket_node->ticket) {
326 IWM_ERR(iwm, "Couldn't allocate RX ticket\n");
327 kfree(ticket_node);
328 return ERR_PTR(-ENOMEM);
329 }
330
331 memcpy(ticket_node->ticket, ticket, sizeof(struct iwm_rx_ticket));
332 INIT_LIST_HEAD(&ticket_node->node);
333
334 return ticket_node;
335 }
336
337 static void iwm_rx_ticket_node_free(struct iwm_rx_ticket_node *ticket_node)
338 {
339 kfree(ticket_node->ticket);
340 kfree(ticket_node);
341 }
342
343 static struct iwm_rx_packet *iwm_rx_packet_get(struct iwm_priv *iwm, u16 id)
344 {
345 u8 id_hash = IWM_RX_ID_GET_HASH(id);
346 struct list_head *packet_list;
347 struct iwm_rx_packet *packet, *next;
348
349 packet_list = &iwm->rx_packets[id_hash];
350
351 list_for_each_entry_safe(packet, next, packet_list, node)
352 if (packet->id == id)
353 return packet;
354
355 return NULL;
356 }
357
358 static struct iwm_rx_packet *iwm_rx_packet_alloc(struct iwm_priv *iwm, u8 *buf,
359 u32 size, u16 id)
360 {
361 struct iwm_rx_packet *packet;
362
363 packet = kzalloc(sizeof(struct iwm_rx_packet), GFP_KERNEL);
364 if (!packet) {
365 IWM_ERR(iwm, "Couldn't allocate packet\n");
366 return ERR_PTR(-ENOMEM);
367 }
368
369 packet->skb = dev_alloc_skb(size);
370 if (!packet->skb) {
371 IWM_ERR(iwm, "Couldn't allocate packet SKB\n");
372 kfree(packet);
373 return ERR_PTR(-ENOMEM);
374 }
375
376 packet->pkt_size = size;
377
378 skb_put(packet->skb, size);
379 memcpy(packet->skb->data, buf, size);
380 INIT_LIST_HEAD(&packet->node);
381 packet->id = id;
382
383 return packet;
384 }
385
386 void iwm_rx_free(struct iwm_priv *iwm)
387 {
388 struct iwm_rx_ticket_node *ticket, *nt;
389 struct iwm_rx_packet *packet, *np;
390 int i;
391
392 list_for_each_entry_safe(ticket, nt, &iwm->rx_tickets, node) {
393 list_del(&ticket->node);
394 iwm_rx_ticket_node_free(ticket);
395 }
396
397 for (i = 0; i < IWM_RX_ID_HASH; i++) {
398 list_for_each_entry_safe(packet, np, &iwm->rx_packets[i],
399 node) {
400 list_del(&packet->node);
401 kfree_skb(packet->skb);
402 kfree(packet);
403 }
404 }
405 }
406
407 static int iwm_ntf_rx_ticket(struct iwm_priv *iwm, u8 *buf,
408 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
409 {
410 struct iwm_umac_notif_rx_ticket *ntf_rx_ticket =
411 (struct iwm_umac_notif_rx_ticket *)buf;
412 struct iwm_rx_ticket *ticket =
413 (struct iwm_rx_ticket *)ntf_rx_ticket->tickets;
414 int i, schedule_rx = 0;
415
416 for (i = 0; i < ntf_rx_ticket->num_tickets; i++) {
417 struct iwm_rx_ticket_node *ticket_node;
418
419 switch (le16_to_cpu(ticket->action)) {
420 case IWM_RX_TICKET_RELEASE:
421 case IWM_RX_TICKET_DROP:
422 /* We can push the packet to the stack */
423 ticket_node = iwm_rx_ticket_node_alloc(iwm, ticket);
424 if (IS_ERR(ticket_node))
425 return PTR_ERR(ticket_node);
426
427 IWM_DBG_RX(iwm, DBG, "TICKET %s(%d)\n",
428 ticket->action == IWM_RX_TICKET_RELEASE ?
429 "RELEASE" : "DROP",
430 ticket->id);
431 list_add_tail(&ticket_node->node, &iwm->rx_tickets);
432
433 /*
434 * We received an Rx ticket, most likely there's
435 * a packet pending for it, it's not worth going
436 * through the packet hash list to double check.
437 * Let's just fire the rx worker..
438 */
439 schedule_rx = 1;
440
441 break;
442
443 default:
444 IWM_ERR(iwm, "Invalid RX ticket action: 0x%x\n",
445 ticket->action);
446 }
447
448 ticket++;
449 }
450
451 if (schedule_rx)
452 queue_work(iwm->rx_wq, &iwm->rx_worker);
453
454 return 0;
455 }
456
457 static int iwm_ntf_rx_packet(struct iwm_priv *iwm, u8 *buf,
458 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
459 {
460 struct iwm_umac_wifi_in_hdr *wifi_hdr;
461 struct iwm_rx_packet *packet;
462 u16 id, buf_offset;
463 u32 packet_size;
464
465 IWM_DBG_RX(iwm, DBG, "\n");
466
467 wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
468 id = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num);
469 buf_offset = sizeof(struct iwm_umac_wifi_in_hdr);
470 packet_size = buf_size - sizeof(struct iwm_umac_wifi_in_hdr);
471
472 IWM_DBG_RX(iwm, DBG, "CMD:0x%x, seqnum: %d, packet size: %d\n",
473 wifi_hdr->sw_hdr.cmd.cmd, id, packet_size);
474 IWM_DBG_RX(iwm, DBG, "Packet id: %d\n", id);
475 IWM_HEXDUMP(iwm, DBG, RX, "PACKET: ", buf + buf_offset, packet_size);
476
477 packet = iwm_rx_packet_alloc(iwm, buf + buf_offset, packet_size, id);
478 if (IS_ERR(packet))
479 return PTR_ERR(packet);
480
481 list_add_tail(&packet->node, &iwm->rx_packets[IWM_RX_ID_GET_HASH(id)]);
482
483 /* We might (unlikely) have received the packet _after_ the ticket */
484 queue_work(iwm->rx_wq, &iwm->rx_worker);
485
486 return 0;
487 }
488
489 /* MLME handlers */
490 static int iwm_mlme_assoc_start(struct iwm_priv *iwm, u8 *buf,
491 unsigned long buf_size,
492 struct iwm_wifi_cmd *cmd)
493 {
494 struct iwm_umac_notif_assoc_start *start;
495
496 start = (struct iwm_umac_notif_assoc_start *)buf;
497
498 IWM_DBG_MLME(iwm, INFO, "Association with %pM Started, reason: %d\n",
499 start->bssid, le32_to_cpu(start->roam_reason));
500
501 wake_up_interruptible(&iwm->mlme_queue);
502
503 return 0;
504 }
505
506 static u8 iwm_is_open_wep_profile(struct iwm_priv *iwm)
507 {
508 if ((iwm->umac_profile->sec.ucast_cipher == UMAC_CIPHER_TYPE_WEP_40 ||
509 iwm->umac_profile->sec.ucast_cipher == UMAC_CIPHER_TYPE_WEP_104) &&
510 (iwm->umac_profile->sec.ucast_cipher ==
511 iwm->umac_profile->sec.mcast_cipher) &&
512 (iwm->umac_profile->sec.auth_type == UMAC_AUTH_TYPE_OPEN))
513 return 1;
514
515 return 0;
516 }
517
518 static int iwm_mlme_assoc_complete(struct iwm_priv *iwm, u8 *buf,
519 unsigned long buf_size,
520 struct iwm_wifi_cmd *cmd)
521 {
522 struct iwm_umac_notif_assoc_complete *complete =
523 (struct iwm_umac_notif_assoc_complete *)buf;
524
525 IWM_DBG_MLME(iwm, INFO, "Association with %pM completed, status: %d\n",
526 complete->bssid, complete->status);
527
528 switch (le32_to_cpu(complete->status)) {
529 case UMAC_ASSOC_COMPLETE_SUCCESS:
530 set_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
531 memcpy(iwm->bssid, complete->bssid, ETH_ALEN);
532 iwm->channel = complete->channel;
533
534 /* Internal roaming state, avoid notifying SME. */
535 if (!test_and_clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status)
536 && iwm->conf.mode == UMAC_MODE_BSS) {
537 cancel_delayed_work(&iwm->disconnect);
538 cfg80211_roamed(iwm_to_ndev(iwm),
539 complete->bssid,
540 iwm->req_ie, iwm->req_ie_len,
541 iwm->resp_ie, iwm->resp_ie_len,
542 GFP_KERNEL);
543 break;
544 }
545
546 iwm_link_on(iwm);
547
548 if (iwm->conf.mode == UMAC_MODE_IBSS)
549 goto ibss;
550
551 if (!test_bit(IWM_STATUS_RESETTING, &iwm->status))
552 cfg80211_connect_result(iwm_to_ndev(iwm),
553 complete->bssid,
554 iwm->req_ie, iwm->req_ie_len,
555 iwm->resp_ie, iwm->resp_ie_len,
556 WLAN_STATUS_SUCCESS,
557 GFP_KERNEL);
558 else
559 cfg80211_roamed(iwm_to_ndev(iwm),
560 complete->bssid,
561 iwm->req_ie, iwm->req_ie_len,
562 iwm->resp_ie, iwm->resp_ie_len,
563 GFP_KERNEL);
564 break;
565 case UMAC_ASSOC_COMPLETE_FAILURE:
566 clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
567 memset(iwm->bssid, 0, ETH_ALEN);
568 iwm->channel = 0;
569
570 /* Internal roaming state, avoid notifying SME. */
571 if (!test_and_clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status)
572 && iwm->conf.mode == UMAC_MODE_BSS) {
573 cancel_delayed_work(&iwm->disconnect);
574 break;
575 }
576
577 iwm_link_off(iwm);
578
579 if (iwm->conf.mode == UMAC_MODE_IBSS)
580 goto ibss;
581
582 if (!test_bit(IWM_STATUS_RESETTING, &iwm->status))
583 if (!iwm_is_open_wep_profile(iwm)) {
584 cfg80211_connect_result(iwm_to_ndev(iwm),
585 complete->bssid,
586 NULL, 0, NULL, 0,
587 WLAN_STATUS_UNSPECIFIED_FAILURE,
588 GFP_KERNEL);
589 } else {
590 /* Let's try shared WEP auth */
591 IWM_ERR(iwm, "Trying WEP shared auth\n");
592 schedule_work(&iwm->auth_retry_worker);
593 }
594 else
595 cfg80211_disconnected(iwm_to_ndev(iwm), 0, NULL, 0,
596 GFP_KERNEL);
597 break;
598 default:
599 break;
600 }
601
602 clear_bit(IWM_STATUS_RESETTING, &iwm->status);
603 return 0;
604
605 ibss:
606 cfg80211_ibss_joined(iwm_to_ndev(iwm), iwm->bssid, GFP_KERNEL);
607 clear_bit(IWM_STATUS_RESETTING, &iwm->status);
608 return 0;
609 }
610
611 static int iwm_mlme_profile_invalidate(struct iwm_priv *iwm, u8 *buf,
612 unsigned long buf_size,
613 struct iwm_wifi_cmd *cmd)
614 {
615 struct iwm_umac_notif_profile_invalidate *invalid;
616 u32 reason;
617
618 invalid = (struct iwm_umac_notif_profile_invalidate *)buf;
619 reason = le32_to_cpu(invalid->reason);
620
621 IWM_DBG_MLME(iwm, INFO, "Profile Invalidated. Reason: %d\n", reason);
622
623 if (reason != UMAC_PROFILE_INVALID_REQUEST &&
624 test_bit(IWM_STATUS_SME_CONNECTING, &iwm->status))
625 cfg80211_connect_result(iwm_to_ndev(iwm), NULL, NULL, 0, NULL,
626 0, WLAN_STATUS_UNSPECIFIED_FAILURE,
627 GFP_KERNEL);
628
629 clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status);
630 clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
631
632 iwm->umac_profile_active = 0;
633 memset(iwm->bssid, 0, ETH_ALEN);
634 iwm->channel = 0;
635
636 iwm_link_off(iwm);
637
638 wake_up_interruptible(&iwm->mlme_queue);
639
640 return 0;
641 }
642
643 #define IWM_DISCONNECT_INTERVAL (5 * HZ)
644
645 static int iwm_mlme_connection_terminated(struct iwm_priv *iwm, u8 *buf,
646 unsigned long buf_size,
647 struct iwm_wifi_cmd *cmd)
648 {
649 IWM_DBG_MLME(iwm, DBG, "Connection terminated\n");
650
651 schedule_delayed_work(&iwm->disconnect, IWM_DISCONNECT_INTERVAL);
652
653 return 0;
654 }
655
656 static int iwm_mlme_scan_complete(struct iwm_priv *iwm, u8 *buf,
657 unsigned long buf_size,
658 struct iwm_wifi_cmd *cmd)
659 {
660 int ret;
661 struct iwm_umac_notif_scan_complete *scan_complete =
662 (struct iwm_umac_notif_scan_complete *)buf;
663 u32 result = le32_to_cpu(scan_complete->result);
664
665 IWM_DBG_MLME(iwm, INFO, "type:0x%x result:0x%x seq:%d\n",
666 le32_to_cpu(scan_complete->type),
667 le32_to_cpu(scan_complete->result),
668 scan_complete->seq_num);
669
670 if (!test_and_clear_bit(IWM_STATUS_SCANNING, &iwm->status)) {
671 IWM_ERR(iwm, "Scan complete while device not scanning\n");
672 return -EIO;
673 }
674 if (!iwm->scan_request)
675 return 0;
676
677 ret = iwm_cfg80211_inform_bss(iwm);
678
679 cfg80211_scan_done(iwm->scan_request,
680 (result & UMAC_SCAN_RESULT_ABORTED) ? 1 : !!ret);
681 iwm->scan_request = NULL;
682
683 return ret;
684 }
685
686 static int iwm_mlme_update_sta_table(struct iwm_priv *iwm, u8 *buf,
687 unsigned long buf_size,
688 struct iwm_wifi_cmd *cmd)
689 {
690 struct iwm_umac_notif_sta_info *umac_sta =
691 (struct iwm_umac_notif_sta_info *)buf;
692 struct iwm_sta_info *sta;
693 int i;
694
695 switch (le32_to_cpu(umac_sta->opcode)) {
696 case UMAC_OPCODE_ADD_MODIFY:
697 sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
698
699 IWM_DBG_MLME(iwm, INFO, "%s STA: ID = %d, Color = %d, "
700 "addr = %pM, qos = %d\n",
701 sta->valid ? "Modify" : "Add",
702 GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
703 GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
704 umac_sta->mac_addr,
705 umac_sta->flags & UMAC_STA_FLAG_QOS);
706
707 sta->valid = 1;
708 sta->qos = umac_sta->flags & UMAC_STA_FLAG_QOS;
709 sta->color = GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR);
710 memcpy(sta->addr, umac_sta->mac_addr, ETH_ALEN);
711 break;
712 case UMAC_OPCODE_REMOVE:
713 IWM_DBG_MLME(iwm, INFO, "Remove STA: ID = %d, Color = %d, "
714 "addr = %pM\n",
715 GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
716 GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
717 umac_sta->mac_addr);
718
719 sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
720
721 if (!memcmp(sta->addr, umac_sta->mac_addr, ETH_ALEN))
722 sta->valid = 0;
723
724 break;
725 case UMAC_OPCODE_CLEAR_ALL:
726 for (i = 0; i < IWM_STA_TABLE_NUM; i++)
727 iwm->sta_table[i].valid = 0;
728
729 break;
730 default:
731 break;
732 }
733
734 return 0;
735 }
736
737 static int iwm_mlme_medium_lost(struct iwm_priv *iwm, u8 *buf,
738 unsigned long buf_size,
739 struct iwm_wifi_cmd *cmd)
740 {
741 struct wiphy *wiphy = iwm_to_wiphy(iwm);
742
743 IWM_DBG_NTF(iwm, DBG, "WiFi/WiMax coexistence radio is OFF\n");
744
745 wiphy_rfkill_set_hw_state(wiphy, true);
746
747 return 0;
748 }
749
750 static int iwm_mlme_update_bss_table(struct iwm_priv *iwm, u8 *buf,
751 unsigned long buf_size,
752 struct iwm_wifi_cmd *cmd)
753 {
754 struct wiphy *wiphy = iwm_to_wiphy(iwm);
755 struct ieee80211_mgmt *mgmt;
756 struct iwm_umac_notif_bss_info *umac_bss =
757 (struct iwm_umac_notif_bss_info *)buf;
758 struct ieee80211_channel *channel;
759 struct ieee80211_supported_band *band;
760 struct iwm_bss_info *bss, *next;
761 s32 signal;
762 int freq;
763 u16 frame_len = le16_to_cpu(umac_bss->frame_len);
764 size_t bss_len = sizeof(struct iwm_umac_notif_bss_info) + frame_len;
765
766 mgmt = (struct ieee80211_mgmt *)(umac_bss->frame_buf);
767
768 IWM_DBG_MLME(iwm, DBG, "New BSS info entry: %pM\n", mgmt->bssid);
769 IWM_DBG_MLME(iwm, DBG, "\tType: 0x%x\n", le32_to_cpu(umac_bss->type));
770 IWM_DBG_MLME(iwm, DBG, "\tTimestamp: %d\n",
771 le32_to_cpu(umac_bss->timestamp));
772 IWM_DBG_MLME(iwm, DBG, "\tTable Index: %d\n",
773 le16_to_cpu(umac_bss->table_idx));
774 IWM_DBG_MLME(iwm, DBG, "\tBand: %d\n", umac_bss->band);
775 IWM_DBG_MLME(iwm, DBG, "\tChannel: %d\n", umac_bss->channel);
776 IWM_DBG_MLME(iwm, DBG, "\tRSSI: %d\n", umac_bss->rssi);
777 IWM_DBG_MLME(iwm, DBG, "\tFrame Length: %d\n", frame_len);
778
779 list_for_each_entry_safe(bss, next, &iwm->bss_list, node)
780 if (bss->bss->table_idx == umac_bss->table_idx)
781 break;
782
783 if (&bss->node != &iwm->bss_list) {
784 /* Remove the old BSS entry, we will add it back later. */
785 list_del(&bss->node);
786 kfree(bss->bss);
787 } else {
788 /* New BSS entry */
789
790 bss = kzalloc(sizeof(struct iwm_bss_info), GFP_KERNEL);
791 if (!bss) {
792 IWM_ERR(iwm, "Couldn't allocate bss_info\n");
793 return -ENOMEM;
794 }
795 }
796
797 bss->bss = kzalloc(bss_len, GFP_KERNEL);
798 if (!bss->bss) {
799 kfree(bss);
800 IWM_ERR(iwm, "Couldn't allocate bss\n");
801 return -ENOMEM;
802 }
803
804 INIT_LIST_HEAD(&bss->node);
805 memcpy(bss->bss, umac_bss, bss_len);
806
807 if (umac_bss->band == UMAC_BAND_2GHZ)
808 band = wiphy->bands[IEEE80211_BAND_2GHZ];
809 else if (umac_bss->band == UMAC_BAND_5GHZ)
810 band = wiphy->bands[IEEE80211_BAND_5GHZ];
811 else {
812 IWM_ERR(iwm, "Invalid band: %d\n", umac_bss->band);
813 goto err;
814 }
815
816 freq = ieee80211_channel_to_frequency(umac_bss->channel);
817 channel = ieee80211_get_channel(wiphy, freq);
818 signal = umac_bss->rssi * 100;
819
820 bss->cfg_bss = cfg80211_inform_bss_frame(wiphy, channel,
821 mgmt, frame_len,
822 signal, GFP_KERNEL);
823 if (!bss->cfg_bss)
824 goto err;
825
826 list_add_tail(&bss->node, &iwm->bss_list);
827
828 return 0;
829 err:
830 kfree(bss->bss);
831 kfree(bss);
832
833 return -EINVAL;
834 }
835
836 static int iwm_mlme_remove_bss(struct iwm_priv *iwm, u8 *buf,
837 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
838 {
839 struct iwm_umac_notif_bss_removed *bss_rm =
840 (struct iwm_umac_notif_bss_removed *)buf;
841 struct iwm_bss_info *bss, *next;
842 u16 table_idx;
843 int i;
844
845 for (i = 0; i < le32_to_cpu(bss_rm->count); i++) {
846 table_idx = (le16_to_cpu(bss_rm->entries[i])
847 & IWM_BSS_REMOVE_INDEX_MSK);
848 list_for_each_entry_safe(bss, next, &iwm->bss_list, node)
849 if (bss->bss->table_idx == cpu_to_le16(table_idx)) {
850 struct ieee80211_mgmt *mgmt;
851
852 mgmt = (struct ieee80211_mgmt *)
853 (bss->bss->frame_buf);
854 IWM_DBG_MLME(iwm, ERR,
855 "BSS removed: %pM\n",
856 mgmt->bssid);
857 list_del(&bss->node);
858 kfree(bss->bss);
859 kfree(bss);
860 }
861 }
862
863 return 0;
864 }
865
866 static int iwm_mlme_mgt_frame(struct iwm_priv *iwm, u8 *buf,
867 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
868 {
869 struct iwm_umac_notif_mgt_frame *mgt_frame =
870 (struct iwm_umac_notif_mgt_frame *)buf;
871 struct ieee80211_mgmt *mgt = (struct ieee80211_mgmt *)mgt_frame->frame;
872
873 IWM_HEXDUMP(iwm, DBG, MLME, "MGT: ", mgt_frame->frame,
874 le16_to_cpu(mgt_frame->len));
875
876 if (ieee80211_is_assoc_req(mgt->frame_control)) {
877 iwm->req_ie_len = le16_to_cpu(mgt_frame->len)
878 - offsetof(struct ieee80211_mgmt,
879 u.assoc_req.variable);
880 kfree(iwm->req_ie);
881 iwm->req_ie = kmemdup(mgt->u.assoc_req.variable,
882 iwm->req_ie_len, GFP_KERNEL);
883 } else if (ieee80211_is_reassoc_req(mgt->frame_control)) {
884 iwm->req_ie_len = le16_to_cpu(mgt_frame->len)
885 - offsetof(struct ieee80211_mgmt,
886 u.reassoc_req.variable);
887 kfree(iwm->req_ie);
888 iwm->req_ie = kmemdup(mgt->u.reassoc_req.variable,
889 iwm->req_ie_len, GFP_KERNEL);
890 } else if (ieee80211_is_assoc_resp(mgt->frame_control)) {
891 iwm->resp_ie_len = le16_to_cpu(mgt_frame->len)
892 - offsetof(struct ieee80211_mgmt,
893 u.assoc_resp.variable);
894 kfree(iwm->resp_ie);
895 iwm->resp_ie = kmemdup(mgt->u.assoc_resp.variable,
896 iwm->resp_ie_len, GFP_KERNEL);
897 } else if (ieee80211_is_reassoc_resp(mgt->frame_control)) {
898 iwm->resp_ie_len = le16_to_cpu(mgt_frame->len)
899 - offsetof(struct ieee80211_mgmt,
900 u.reassoc_resp.variable);
901 kfree(iwm->resp_ie);
902 iwm->resp_ie = kmemdup(mgt->u.reassoc_resp.variable,
903 iwm->resp_ie_len, GFP_KERNEL);
904 } else {
905 IWM_ERR(iwm, "Unsupported management frame: 0x%x",
906 le16_to_cpu(mgt->frame_control));
907 return 0;
908 }
909
910 return 0;
911 }
912
913 static int iwm_ntf_mlme(struct iwm_priv *iwm, u8 *buf,
914 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
915 {
916 struct iwm_umac_notif_wifi_if *notif =
917 (struct iwm_umac_notif_wifi_if *)buf;
918
919 switch (notif->status) {
920 case WIFI_IF_NTFY_ASSOC_START:
921 return iwm_mlme_assoc_start(iwm, buf, buf_size, cmd);
922 case WIFI_IF_NTFY_ASSOC_COMPLETE:
923 return iwm_mlme_assoc_complete(iwm, buf, buf_size, cmd);
924 case WIFI_IF_NTFY_PROFILE_INVALIDATE_COMPLETE:
925 return iwm_mlme_profile_invalidate(iwm, buf, buf_size, cmd);
926 case WIFI_IF_NTFY_CONNECTION_TERMINATED:
927 return iwm_mlme_connection_terminated(iwm, buf, buf_size, cmd);
928 case WIFI_IF_NTFY_SCAN_COMPLETE:
929 return iwm_mlme_scan_complete(iwm, buf, buf_size, cmd);
930 case WIFI_IF_NTFY_STA_TABLE_CHANGE:
931 return iwm_mlme_update_sta_table(iwm, buf, buf_size, cmd);
932 case WIFI_IF_NTFY_EXTENDED_IE_REQUIRED:
933 IWM_DBG_MLME(iwm, DBG, "Extended IE required\n");
934 break;
935 case WIFI_IF_NTFY_RADIO_PREEMPTION:
936 return iwm_mlme_medium_lost(iwm, buf, buf_size, cmd);
937 case WIFI_IF_NTFY_BSS_TRK_TABLE_CHANGED:
938 return iwm_mlme_update_bss_table(iwm, buf, buf_size, cmd);
939 case WIFI_IF_NTFY_BSS_TRK_ENTRIES_REMOVED:
940 return iwm_mlme_remove_bss(iwm, buf, buf_size, cmd);
941 break;
942 case WIFI_IF_NTFY_MGMT_FRAME:
943 return iwm_mlme_mgt_frame(iwm, buf, buf_size, cmd);
944 case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_START:
945 case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_COMPLETE:
946 case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_START:
947 case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_RESULT:
948 case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_START:
949 case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_COMPLETE:
950 case WIFI_DBG_IF_NTFY_CNCT_ATC_START:
951 case WIFI_DBG_IF_NTFY_COEX_NOTIFICATION:
952 case WIFI_DBG_IF_NTFY_COEX_HANDLE_ENVELOP:
953 case WIFI_DBG_IF_NTFY_COEX_HANDLE_RELEASE_ENVELOP:
954 IWM_DBG_MLME(iwm, DBG, "MLME debug notification: 0x%x\n",
955 notif->status);
956 break;
957 default:
958 IWM_ERR(iwm, "Unhandled notification: 0x%x\n", notif->status);
959 break;
960 }
961
962 return 0;
963 }
964
965 #define IWM_STATS_UPDATE_INTERVAL (2 * HZ)
966
967 static int iwm_ntf_statistics(struct iwm_priv *iwm, u8 *buf,
968 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
969 {
970 struct iwm_umac_notif_stats *stats = (struct iwm_umac_notif_stats *)buf;
971 struct iw_statistics *wstats = &iwm->wstats;
972 u16 max_rate = 0;
973 int i;
974
975 IWM_DBG_MLME(iwm, DBG, "Statistics notification received\n");
976
977 if (test_bit(IWM_STATUS_ASSOCIATED, &iwm->status)) {
978 for (i = 0; i < UMAC_NTF_RATE_SAMPLE_NR; i++) {
979 max_rate = max_t(u16, max_rate,
980 max(le16_to_cpu(stats->tx_rate[i]),
981 le16_to_cpu(stats->rx_rate[i])));
982 }
983 /* UMAC passes rate info multiplies by 2 */
984 iwm->rate = max_rate >> 1;
985 }
986 iwm->txpower = le32_to_cpu(stats->tx_power);
987
988 wstats->status = 0;
989
990 wstats->discard.nwid = le32_to_cpu(stats->rx_drop_other_bssid);
991 wstats->discard.code = le32_to_cpu(stats->rx_drop_decode);
992 wstats->discard.fragment = le32_to_cpu(stats->rx_drop_reassembly);
993 wstats->discard.retries = le32_to_cpu(stats->tx_drop_max_retry);
994
995 wstats->miss.beacon = le32_to_cpu(stats->missed_beacons);
996
997 /* according to cfg80211 */
998 if (stats->rssi_dbm < -110)
999 wstats->qual.qual = 0;
1000 else if (stats->rssi_dbm > -40)
1001 wstats->qual.qual = 70;
1002 else
1003 wstats->qual.qual = stats->rssi_dbm + 110;
1004
1005 wstats->qual.level = stats->rssi_dbm;
1006 wstats->qual.noise = stats->noise_dbm;
1007 wstats->qual.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
1008
1009 schedule_delayed_work(&iwm->stats_request, IWM_STATS_UPDATE_INTERVAL);
1010
1011 mod_timer(&iwm->watchdog, round_jiffies(jiffies + IWM_WATCHDOG_PERIOD));
1012
1013 return 0;
1014 }
1015
1016 static int iwm_ntf_eeprom_proxy(struct iwm_priv *iwm, u8 *buf,
1017 unsigned long buf_size,
1018 struct iwm_wifi_cmd *cmd)
1019 {
1020 struct iwm_umac_cmd_eeprom_proxy *eeprom_proxy =
1021 (struct iwm_umac_cmd_eeprom_proxy *)
1022 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1023 struct iwm_umac_cmd_eeprom_proxy_hdr *hdr = &eeprom_proxy->hdr;
1024 u32 hdr_offset = le32_to_cpu(hdr->offset);
1025 u32 hdr_len = le32_to_cpu(hdr->len);
1026 u32 hdr_type = le32_to_cpu(hdr->type);
1027
1028 IWM_DBG_NTF(iwm, DBG, "type: 0x%x, len: %d, offset: 0x%x\n",
1029 hdr_type, hdr_len, hdr_offset);
1030
1031 if ((hdr_offset + hdr_len) > IWM_EEPROM_LEN)
1032 return -EINVAL;
1033
1034 switch (hdr_type) {
1035 case IWM_UMAC_CMD_EEPROM_TYPE_READ:
1036 memcpy(iwm->eeprom + hdr_offset, eeprom_proxy->buf, hdr_len);
1037 break;
1038 case IWM_UMAC_CMD_EEPROM_TYPE_WRITE:
1039 default:
1040 return -ENOTSUPP;
1041 }
1042
1043 return 0;
1044 }
1045
1046 static int iwm_ntf_channel_info_list(struct iwm_priv *iwm, u8 *buf,
1047 unsigned long buf_size,
1048 struct iwm_wifi_cmd *cmd)
1049 {
1050 struct iwm_umac_cmd_get_channel_list *ch_list =
1051 (struct iwm_umac_cmd_get_channel_list *)
1052 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1053 struct wiphy *wiphy = iwm_to_wiphy(iwm);
1054 struct ieee80211_supported_band *band;
1055 int i;
1056
1057 band = wiphy->bands[IEEE80211_BAND_2GHZ];
1058
1059 for (i = 0; i < band->n_channels; i++) {
1060 unsigned long ch_mask_0 =
1061 le32_to_cpu(ch_list->ch[0].channels_mask);
1062 unsigned long ch_mask_2 =
1063 le32_to_cpu(ch_list->ch[2].channels_mask);
1064
1065 if (!test_bit(i, &ch_mask_0))
1066 band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
1067
1068 if (!test_bit(i, &ch_mask_2))
1069 band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
1070 }
1071
1072 band = wiphy->bands[IEEE80211_BAND_5GHZ];
1073
1074 for (i = 0; i < min(band->n_channels, 32); i++) {
1075 unsigned long ch_mask_1 =
1076 le32_to_cpu(ch_list->ch[1].channels_mask);
1077 unsigned long ch_mask_3 =
1078 le32_to_cpu(ch_list->ch[3].channels_mask);
1079
1080 if (!test_bit(i, &ch_mask_1))
1081 band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
1082
1083 if (!test_bit(i, &ch_mask_3))
1084 band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
1085 }
1086
1087 return 0;
1088 }
1089
1090 static int iwm_ntf_stop_resume_tx(struct iwm_priv *iwm, u8 *buf,
1091 unsigned long buf_size,
1092 struct iwm_wifi_cmd *cmd)
1093 {
1094 struct iwm_umac_notif_stop_resume_tx *stp_res_tx =
1095 (struct iwm_umac_notif_stop_resume_tx *)buf;
1096 struct iwm_sta_info *sta_info;
1097 struct iwm_tid_info *tid_info;
1098 u8 sta_id = STA_ID_N_COLOR_ID(stp_res_tx->sta_id);
1099 u16 tid_msk = le16_to_cpu(stp_res_tx->stop_resume_tid_msk);
1100 int bit, ret = 0;
1101 bool stop = false;
1102
1103 IWM_DBG_NTF(iwm, DBG, "stop/resume notification:\n"
1104 "\tflags: 0x%x\n"
1105 "\tSTA id: %d\n"
1106 "\tTID bitmask: 0x%x\n",
1107 stp_res_tx->flags, stp_res_tx->sta_id,
1108 stp_res_tx->stop_resume_tid_msk);
1109
1110 if (stp_res_tx->flags & UMAC_STOP_TX_FLAG)
1111 stop = true;
1112
1113 sta_info = &iwm->sta_table[sta_id];
1114 if (!sta_info->valid) {
1115 IWM_ERR(iwm, "Stoping an invalid STA: %d %d\n",
1116 sta_id, stp_res_tx->sta_id);
1117 return -EINVAL;
1118 }
1119
1120 for_each_set_bit(bit, (unsigned long *)&tid_msk, IWM_UMAC_TID_NR) {
1121 tid_info = &sta_info->tid_info[bit];
1122
1123 mutex_lock(&tid_info->mutex);
1124 tid_info->stopped = stop;
1125 mutex_unlock(&tid_info->mutex);
1126
1127 if (!stop) {
1128 struct iwm_tx_queue *txq;
1129 int queue = iwm_tid_to_queue(bit);
1130
1131 if (queue < 0)
1132 continue;
1133
1134 txq = &iwm->txq[queue];
1135 /*
1136 * If we resume, we have to move our SKBs
1137 * back to the tx queue and queue some work.
1138 */
1139 spin_lock_bh(&txq->lock);
1140 skb_queue_splice_init(&txq->queue, &txq->stopped_queue);
1141 spin_unlock_bh(&txq->lock);
1142
1143 queue_work(txq->wq, &txq->worker);
1144 }
1145
1146 }
1147
1148 /* We send an ACK only for the stop case */
1149 if (stop)
1150 ret = iwm_send_umac_stop_resume_tx(iwm, stp_res_tx);
1151
1152 return ret;
1153 }
1154
1155 static int iwm_ntf_wifi_if_wrapper(struct iwm_priv *iwm, u8 *buf,
1156 unsigned long buf_size,
1157 struct iwm_wifi_cmd *cmd)
1158 {
1159 struct iwm_umac_wifi_if *hdr;
1160
1161 if (cmd == NULL) {
1162 IWM_ERR(iwm, "Couldn't find expected wifi command\n");
1163 return -EINVAL;
1164 }
1165
1166 hdr = (struct iwm_umac_wifi_if *)cmd->buf.payload;
1167
1168 IWM_DBG_NTF(iwm, DBG, "WIFI_IF_WRAPPER cmd is delivered to UMAC: "
1169 "oid is 0x%x\n", hdr->oid);
1170
1171 if (hdr->oid <= WIFI_IF_NTFY_MAX) {
1172 set_bit(hdr->oid, &iwm->wifi_ntfy[0]);
1173 wake_up_interruptible(&iwm->wifi_ntfy_queue);
1174 } else
1175 return -EINVAL;
1176
1177 switch (hdr->oid) {
1178 case UMAC_WIFI_IF_CMD_SET_PROFILE:
1179 iwm->umac_profile_active = 1;
1180 break;
1181 default:
1182 break;
1183 }
1184
1185 return 0;
1186 }
1187
1188 #define CT_KILL_DELAY (30 * HZ)
1189 static int iwm_ntf_card_state(struct iwm_priv *iwm, u8 *buf,
1190 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
1191 {
1192 struct wiphy *wiphy = iwm_to_wiphy(iwm);
1193 struct iwm_lmac_card_state *state = (struct iwm_lmac_card_state *)
1194 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1195 u32 flags = le32_to_cpu(state->flags);
1196
1197 IWM_INFO(iwm, "HW RF Kill %s, CT Kill %s\n",
1198 flags & IWM_CARD_STATE_HW_DISABLED ? "ON" : "OFF",
1199 flags & IWM_CARD_STATE_CTKILL_DISABLED ? "ON" : "OFF");
1200
1201 if (flags & IWM_CARD_STATE_CTKILL_DISABLED) {
1202 /*
1203 * We got a CTKILL event: We bring the interface down in
1204 * oder to cool the device down, and try to bring it up
1205 * 30 seconds later. If it's still too hot, we'll go through
1206 * this code path again.
1207 */
1208 cancel_delayed_work_sync(&iwm->ct_kill_delay);
1209 schedule_delayed_work(&iwm->ct_kill_delay, CT_KILL_DELAY);
1210 }
1211
1212 wiphy_rfkill_set_hw_state(wiphy, flags &
1213 (IWM_CARD_STATE_HW_DISABLED |
1214 IWM_CARD_STATE_CTKILL_DISABLED));
1215
1216 return 0;
1217 }
1218
1219 static int iwm_rx_handle_wifi(struct iwm_priv *iwm, u8 *buf,
1220 unsigned long buf_size)
1221 {
1222 struct iwm_umac_wifi_in_hdr *wifi_hdr;
1223 struct iwm_wifi_cmd *cmd;
1224 u8 source, cmd_id;
1225 u16 seq_num;
1226 u32 count;
1227 u8 resp;
1228
1229 wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
1230 cmd_id = wifi_hdr->sw_hdr.cmd.cmd;
1231
1232 source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE);
1233 if (source >= IWM_SRC_NUM) {
1234 IWM_CRIT(iwm, "invalid source %d\n", source);
1235 return -EINVAL;
1236 }
1237
1238 count = (GET_VAL32(wifi_hdr->sw_hdr.meta_data, UMAC_FW_CMD_BYTE_COUNT));
1239 count += sizeof(struct iwm_umac_wifi_in_hdr) -
1240 sizeof(struct iwm_dev_cmd_hdr);
1241 if (count > buf_size) {
1242 IWM_CRIT(iwm, "count %d, buf size:%ld\n", count, buf_size);
1243 return -EINVAL;
1244 }
1245
1246 resp = GET_VAL32(wifi_hdr->sw_hdr.meta_data, UMAC_FW_CMD_STATUS);
1247
1248 seq_num = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num);
1249
1250 IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x, seqnum: %d\n",
1251 cmd_id, source, seq_num);
1252
1253 /*
1254 * If this is a response to a previously sent command, there must
1255 * be a pending command for this sequence number.
1256 */
1257 cmd = iwm_get_pending_wifi_cmd(iwm, seq_num);
1258
1259 /* Notify the caller only for sync commands. */
1260 switch (source) {
1261 case UMAC_HDI_IN_SOURCE_FHRX:
1262 if (iwm->lmac_handlers[cmd_id] &&
1263 test_bit(cmd_id, &iwm->lmac_handler_map[0]))
1264 return iwm_notif_send(iwm, cmd, cmd_id, source,
1265 buf, count);
1266 break;
1267 case UMAC_HDI_IN_SOURCE_FW:
1268 if (iwm->umac_handlers[cmd_id] &&
1269 test_bit(cmd_id, &iwm->umac_handler_map[0]))
1270 return iwm_notif_send(iwm, cmd, cmd_id, source,
1271 buf, count);
1272 break;
1273 case UMAC_HDI_IN_SOURCE_UDMA:
1274 break;
1275 }
1276
1277 return iwm_rx_handle_resp(iwm, buf, count, cmd);
1278 }
1279
1280 int iwm_rx_handle_resp(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size,
1281 struct iwm_wifi_cmd *cmd)
1282 {
1283 u8 source, cmd_id;
1284 struct iwm_umac_wifi_in_hdr *wifi_hdr;
1285 int ret = 0;
1286
1287 wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
1288 cmd_id = wifi_hdr->sw_hdr.cmd.cmd;
1289
1290 source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE);
1291
1292 IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x\n", cmd_id, source);
1293
1294 switch (source) {
1295 case UMAC_HDI_IN_SOURCE_FHRX:
1296 if (iwm->lmac_handlers[cmd_id])
1297 ret = iwm->lmac_handlers[cmd_id]
1298 (iwm, buf, buf_size, cmd);
1299 break;
1300 case UMAC_HDI_IN_SOURCE_FW:
1301 if (iwm->umac_handlers[cmd_id])
1302 ret = iwm->umac_handlers[cmd_id]
1303 (iwm, buf, buf_size, cmd);
1304 break;
1305 case UMAC_HDI_IN_SOURCE_UDMA:
1306 ret = -EINVAL;
1307 break;
1308 }
1309
1310 kfree(cmd);
1311
1312 return ret;
1313 }
1314
1315 static int iwm_rx_handle_nonwifi(struct iwm_priv *iwm, u8 *buf,
1316 unsigned long buf_size)
1317 {
1318 u8 seq_num;
1319 struct iwm_udma_in_hdr *hdr = (struct iwm_udma_in_hdr *)buf;
1320 struct iwm_nonwifi_cmd *cmd, *next;
1321
1322 seq_num = GET_VAL32(hdr->cmd, UDMA_HDI_IN_CMD_NON_WIFI_HW_SEQ_NUM);
1323
1324 /*
1325 * We received a non wifi answer.
1326 * Let's check if there's a pending command for it, and if so
1327 * replace the command payload with the buffer, and then wake the
1328 * callers up.
1329 * That means we only support synchronised non wifi command response
1330 * schemes.
1331 */
1332 list_for_each_entry_safe(cmd, next, &iwm->nonwifi_pending_cmd, pending)
1333 if (cmd->seq_num == seq_num) {
1334 cmd->resp_received = 1;
1335 cmd->buf.len = buf_size;
1336 memcpy(cmd->buf.hdr, buf, buf_size);
1337 wake_up_interruptible(&iwm->nonwifi_queue);
1338 }
1339
1340 return 0;
1341 }
1342
1343 static int iwm_rx_handle_umac(struct iwm_priv *iwm, u8 *buf,
1344 unsigned long buf_size)
1345 {
1346 int ret = 0;
1347 u8 op_code;
1348 unsigned long buf_offset = 0;
1349 struct iwm_udma_in_hdr *hdr;
1350
1351 /*
1352 * To allow for a more efficient bus usage, UMAC
1353 * messages are encapsulated into UDMA ones. This
1354 * way we can have several UMAC messages in one bus
1355 * transfer.
1356 * A UDMA frame size is always aligned on 16 bytes,
1357 * and a UDMA frame must not start with a UMAC_PAD_TERMINAL
1358 * word. This is how we parse a bus frame into several
1359 * UDMA ones.
1360 */
1361 while (buf_offset < buf_size) {
1362
1363 hdr = (struct iwm_udma_in_hdr *)(buf + buf_offset);
1364
1365 if (iwm_rx_check_udma_hdr(hdr) < 0) {
1366 IWM_DBG_RX(iwm, DBG, "End of frame\n");
1367 break;
1368 }
1369
1370 op_code = GET_VAL32(hdr->cmd, UMAC_HDI_IN_CMD_OPCODE);
1371
1372 IWM_DBG_RX(iwm, DBG, "Op code: 0x%x\n", op_code);
1373
1374 if (op_code == UMAC_HDI_IN_OPCODE_WIFI) {
1375 ret |= iwm_rx_handle_wifi(iwm, buf + buf_offset,
1376 buf_size - buf_offset);
1377 } else if (op_code < UMAC_HDI_IN_OPCODE_NONWIFI_MAX) {
1378 if (GET_VAL32(hdr->cmd,
1379 UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) !=
1380 UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) {
1381 IWM_ERR(iwm, "Incorrect hw signature\n");
1382 return -EINVAL;
1383 }
1384 ret |= iwm_rx_handle_nonwifi(iwm, buf + buf_offset,
1385 buf_size - buf_offset);
1386 } else {
1387 IWM_ERR(iwm, "Invalid RX opcode: 0x%x\n", op_code);
1388 ret |= -EINVAL;
1389 }
1390
1391 buf_offset += iwm_rx_resp_size(hdr);
1392 }
1393
1394 return ret;
1395 }
1396
1397 int iwm_rx_handle(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size)
1398 {
1399 struct iwm_udma_in_hdr *hdr;
1400
1401 hdr = (struct iwm_udma_in_hdr *)buf;
1402
1403 switch (le32_to_cpu(hdr->cmd)) {
1404 case UMAC_REBOOT_BARKER:
1405 if (test_bit(IWM_STATUS_READY, &iwm->status)) {
1406 IWM_ERR(iwm, "Unexpected BARKER\n");
1407
1408 schedule_work(&iwm->reset_worker);
1409
1410 return 0;
1411 }
1412
1413 return iwm_notif_send(iwm, NULL, IWM_BARKER_REBOOT_NOTIFICATION,
1414 IWM_SRC_UDMA, buf, buf_size);
1415 case UMAC_ACK_BARKER:
1416 return iwm_notif_send(iwm, NULL, IWM_ACK_BARKER_NOTIFICATION,
1417 IWM_SRC_UDMA, NULL, 0);
1418 default:
1419 IWM_DBG_RX(iwm, DBG, "Received cmd: 0x%x\n", hdr->cmd);
1420 return iwm_rx_handle_umac(iwm, buf, buf_size);
1421 }
1422
1423 return 0;
1424 }
1425
1426 static const iwm_handler iwm_umac_handlers[] =
1427 {
1428 [UMAC_NOTIFY_OPCODE_ERROR] = iwm_ntf_error,
1429 [UMAC_NOTIFY_OPCODE_ALIVE] = iwm_ntf_umac_alive,
1430 [UMAC_NOTIFY_OPCODE_INIT_COMPLETE] = iwm_ntf_init_complete,
1431 [UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS] = iwm_ntf_wifi_status,
1432 [UMAC_NOTIFY_OPCODE_WIFI_IF_WRAPPER] = iwm_ntf_mlme,
1433 [UMAC_NOTIFY_OPCODE_PAGE_DEALLOC] = iwm_ntf_tx_credit_update,
1434 [UMAC_NOTIFY_OPCODE_RX_TICKET] = iwm_ntf_rx_ticket,
1435 [UMAC_CMD_OPCODE_RESET] = iwm_ntf_umac_reset,
1436 [UMAC_NOTIFY_OPCODE_STATS] = iwm_ntf_statistics,
1437 [UMAC_CMD_OPCODE_EEPROM_PROXY] = iwm_ntf_eeprom_proxy,
1438 [UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST] = iwm_ntf_channel_info_list,
1439 [UMAC_CMD_OPCODE_STOP_RESUME_STA_TX] = iwm_ntf_stop_resume_tx,
1440 [REPLY_RX_MPDU_CMD] = iwm_ntf_rx_packet,
1441 [UMAC_CMD_OPCODE_WIFI_IF_WRAPPER] = iwm_ntf_wifi_if_wrapper,
1442 };
1443
1444 static const iwm_handler iwm_lmac_handlers[] =
1445 {
1446 [REPLY_TX] = iwm_ntf_tx,
1447 [REPLY_ALIVE] = iwm_ntf_lmac_version,
1448 [CALIBRATION_RES_NOTIFICATION] = iwm_ntf_calib_res,
1449 [CALIBRATION_COMPLETE_NOTIFICATION] = iwm_ntf_calib_complete,
1450 [CALIBRATION_CFG_CMD] = iwm_ntf_calib_cfg,
1451 [REPLY_RX_MPDU_CMD] = iwm_ntf_rx_packet,
1452 [CARD_STATE_NOTIFICATION] = iwm_ntf_card_state,
1453 };
1454
1455 void iwm_rx_setup_handlers(struct iwm_priv *iwm)
1456 {
1457 iwm->umac_handlers = (iwm_handler *) iwm_umac_handlers;
1458 iwm->lmac_handlers = (iwm_handler *) iwm_lmac_handlers;
1459 }
1460
1461 static void iwm_remove_iv(struct sk_buff *skb, u32 hdr_total_len)
1462 {
1463 struct ieee80211_hdr *hdr;
1464 unsigned int hdr_len;
1465
1466 hdr = (struct ieee80211_hdr *)skb->data;
1467
1468 if (!ieee80211_has_protected(hdr->frame_control))
1469 return;
1470
1471 hdr_len = ieee80211_hdrlen(hdr->frame_control);
1472 if (hdr_total_len <= hdr_len)
1473 return;
1474
1475 memmove(skb->data + (hdr_total_len - hdr_len), skb->data, hdr_len);
1476 skb_pull(skb, (hdr_total_len - hdr_len));
1477 }
1478
1479 static void iwm_rx_adjust_packet(struct iwm_priv *iwm,
1480 struct iwm_rx_packet *packet,
1481 struct iwm_rx_ticket_node *ticket_node)
1482 {
1483 u32 payload_offset = 0, payload_len;
1484 struct iwm_rx_ticket *ticket = ticket_node->ticket;
1485 struct iwm_rx_mpdu_hdr *mpdu_hdr;
1486 struct ieee80211_hdr *hdr;
1487
1488 mpdu_hdr = (struct iwm_rx_mpdu_hdr *)packet->skb->data;
1489 payload_offset += sizeof(struct iwm_rx_mpdu_hdr);
1490 /* Padding is 0 or 2 bytes */
1491 payload_len = le16_to_cpu(mpdu_hdr->len) +
1492 (le16_to_cpu(ticket->flags) & IWM_RX_TICKET_PAD_SIZE_MSK);
1493 payload_len -= ticket->tail_len;
1494
1495 IWM_DBG_RX(iwm, DBG, "Packet adjusted, len:%d, offset:%d, "
1496 "ticket offset:%d ticket tail len:%d\n",
1497 payload_len, payload_offset, ticket->payload_offset,
1498 ticket->tail_len);
1499
1500 IWM_HEXDUMP(iwm, DBG, RX, "RAW: ", packet->skb->data, packet->skb->len);
1501
1502 skb_pull(packet->skb, payload_offset);
1503 skb_trim(packet->skb, payload_len);
1504
1505 iwm_remove_iv(packet->skb, ticket->payload_offset);
1506
1507 hdr = (struct ieee80211_hdr *) packet->skb->data;
1508 if (ieee80211_is_data_qos(hdr->frame_control)) {
1509 /* UMAC handed QOS_DATA frame with 2 padding bytes appended
1510 * to the qos_ctl field in IEEE 802.11 headers. */
1511 memmove(packet->skb->data + IEEE80211_QOS_CTL_LEN + 2,
1512 packet->skb->data,
1513 ieee80211_hdrlen(hdr->frame_control) -
1514 IEEE80211_QOS_CTL_LEN);
1515 hdr = (struct ieee80211_hdr *) skb_pull(packet->skb,
1516 IEEE80211_QOS_CTL_LEN + 2);
1517 hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
1518 }
1519
1520 IWM_HEXDUMP(iwm, DBG, RX, "ADJUSTED: ",
1521 packet->skb->data, packet->skb->len);
1522 }
1523
1524 static void classify8023(struct sk_buff *skb)
1525 {
1526 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1527
1528 if (ieee80211_is_data_qos(hdr->frame_control)) {
1529 u8 *qc = ieee80211_get_qos_ctl(hdr);
1530 /* frame has qos control */
1531 skb->priority = *qc & IEEE80211_QOS_CTL_TID_MASK;
1532 } else {
1533 skb->priority = 0;
1534 }
1535 }
1536
1537 static void iwm_rx_process_amsdu(struct iwm_priv *iwm, struct sk_buff *skb)
1538 {
1539 struct wireless_dev *wdev = iwm_to_wdev(iwm);
1540 struct net_device *ndev = iwm_to_ndev(iwm);
1541 struct sk_buff_head list;
1542 struct sk_buff *frame;
1543
1544 IWM_HEXDUMP(iwm, DBG, RX, "A-MSDU: ", skb->data, skb->len);
1545
1546 __skb_queue_head_init(&list);
1547 ieee80211_amsdu_to_8023s(skb, &list, ndev->dev_addr, wdev->iftype, 0);
1548
1549 while ((frame = __skb_dequeue(&list))) {
1550 ndev->stats.rx_packets++;
1551 ndev->stats.rx_bytes += frame->len;
1552
1553 frame->protocol = eth_type_trans(frame, ndev);
1554 frame->ip_summed = CHECKSUM_NONE;
1555 memset(frame->cb, 0, sizeof(frame->cb));
1556
1557 if (netif_rx_ni(frame) == NET_RX_DROP) {
1558 IWM_ERR(iwm, "Packet dropped\n");
1559 ndev->stats.rx_dropped++;
1560 }
1561 }
1562 }
1563
1564 static void iwm_rx_process_packet(struct iwm_priv *iwm,
1565 struct iwm_rx_packet *packet,
1566 struct iwm_rx_ticket_node *ticket_node)
1567 {
1568 int ret;
1569 struct sk_buff *skb = packet->skb;
1570 struct wireless_dev *wdev = iwm_to_wdev(iwm);
1571 struct net_device *ndev = iwm_to_ndev(iwm);
1572
1573 IWM_DBG_RX(iwm, DBG, "Processing packet ID %d\n", packet->id);
1574
1575 switch (le16_to_cpu(ticket_node->ticket->action)) {
1576 case IWM_RX_TICKET_RELEASE:
1577 IWM_DBG_RX(iwm, DBG, "RELEASE packet\n");
1578
1579 iwm_rx_adjust_packet(iwm, packet, ticket_node);
1580 skb->dev = iwm_to_ndev(iwm);
1581 classify8023(skb);
1582
1583 if (le16_to_cpu(ticket_node->ticket->flags) &
1584 IWM_RX_TICKET_AMSDU_MSK) {
1585 iwm_rx_process_amsdu(iwm, skb);
1586 break;
1587 }
1588
1589 ret = ieee80211_data_to_8023(skb, ndev->dev_addr, wdev->iftype);
1590 if (ret < 0) {
1591 IWM_DBG_RX(iwm, DBG, "Couldn't convert 802.11 header - "
1592 "%d\n", ret);
1593 kfree_skb(packet->skb);
1594 break;
1595 }
1596
1597 IWM_HEXDUMP(iwm, DBG, RX, "802.3: ", skb->data, skb->len);
1598
1599 ndev->stats.rx_packets++;
1600 ndev->stats.rx_bytes += skb->len;
1601
1602 skb->protocol = eth_type_trans(skb, ndev);
1603 skb->ip_summed = CHECKSUM_NONE;
1604 memset(skb->cb, 0, sizeof(skb->cb));
1605
1606 if (netif_rx_ni(skb) == NET_RX_DROP) {
1607 IWM_ERR(iwm, "Packet dropped\n");
1608 ndev->stats.rx_dropped++;
1609 }
1610 break;
1611 case IWM_RX_TICKET_DROP:
1612 IWM_DBG_RX(iwm, DBG, "DROP packet: 0x%x\n",
1613 le16_to_cpu(ticket_node->ticket->flags));
1614 kfree_skb(packet->skb);
1615 break;
1616 default:
1617 IWM_ERR(iwm, "Unknown ticket action: %d\n",
1618 le16_to_cpu(ticket_node->ticket->action));
1619 kfree_skb(packet->skb);
1620 }
1621
1622 kfree(packet);
1623 iwm_rx_ticket_node_free(ticket_node);
1624 }
1625
1626 /*
1627 * Rx data processing:
1628 *
1629 * We're receiving Rx packet from the LMAC, and Rx ticket from
1630 * the UMAC.
1631 * To forward a target data packet upstream (i.e. to the
1632 * kernel network stack), we must have received an Rx ticket
1633 * that tells us we're allowed to release this packet (ticket
1634 * action is IWM_RX_TICKET_RELEASE). The Rx ticket also indicates,
1635 * among other things, where valid data actually starts in the Rx
1636 * packet.
1637 */
1638 void iwm_rx_worker(struct work_struct *work)
1639 {
1640 struct iwm_priv *iwm;
1641 struct iwm_rx_ticket_node *ticket, *next;
1642
1643 iwm = container_of(work, struct iwm_priv, rx_worker);
1644
1645 /*
1646 * We go through the tickets list and if there is a pending
1647 * packet for it, we push it upstream.
1648 * We stop whenever a ticket is missing its packet, as we're
1649 * supposed to send the packets in order.
1650 */
1651 list_for_each_entry_safe(ticket, next, &iwm->rx_tickets, node) {
1652 struct iwm_rx_packet *packet =
1653 iwm_rx_packet_get(iwm, le16_to_cpu(ticket->ticket->id));
1654
1655 if (!packet) {
1656 IWM_DBG_RX(iwm, DBG, "Skip rx_work: Wait for ticket %d "
1657 "to be handled first\n",
1658 le16_to_cpu(ticket->ticket->id));
1659 return;
1660 }
1661
1662 list_del(&ticket->node);
1663 list_del(&packet->node);
1664 iwm_rx_process_packet(iwm, packet, ticket);
1665 }
1666 }
1667
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