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
iwm_rx_check_udma_hdr(struct iwm_udma_in_hdr * hdr)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
iwm_rx_resp_size(struct iwm_udma_in_hdr * hdr)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 */
iwm_ntf_error(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)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
iwm_ntf_umac_alive(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)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
iwm_ntf_init_complete(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)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
iwm_ntf_tx_credit_update(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)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
iwm_ntf_umac_reset(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)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
iwm_ntf_lmac_version(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)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
iwm_ntf_tx(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)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
iwm_ntf_calib_res(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)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
iwm_ntf_calib_complete(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)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
iwm_ntf_calib_cfg(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)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
iwm_ntf_wifi_status(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)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 *
iwm_rx_ticket_node_alloc(struct iwm_priv * iwm,struct iwm_rx_ticket * ticket)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 = kmemdup(ticket, sizeof(struct iwm_rx_ticket),
325 GFP_KERNEL);
326 if (!ticket_node->ticket) {
327 IWM_ERR(iwm, "Couldn't allocate RX ticket\n");
328 kfree(ticket_node);
329 return ERR_PTR(-ENOMEM);
330 }
331
332 INIT_LIST_HEAD(&ticket_node->node);
333
334 return ticket_node;
335 }
336
iwm_rx_ticket_node_free(struct iwm_rx_ticket_node * ticket_node)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
iwm_rx_packet_get(struct iwm_priv * iwm,u16 id)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 iwm_rx_packet *packet;
347
348 spin_lock(&iwm->packet_lock[id_hash]);
349 list_for_each_entry(packet, &iwm->rx_packets[id_hash], node)
350 if (packet->id == id) {
351 list_del(&packet->node);
352 spin_unlock(&iwm->packet_lock[id_hash]);
353 return packet;
354 }
355
356 spin_unlock(&iwm->packet_lock[id_hash]);
357 return NULL;
358 }
359
iwm_rx_packet_alloc(struct iwm_priv * iwm,u8 * buf,u32 size,u16 id)360 static struct iwm_rx_packet *iwm_rx_packet_alloc(struct iwm_priv *iwm, u8 *buf,
361 u32 size, u16 id)
362 {
363 struct iwm_rx_packet *packet;
364
365 packet = kzalloc(sizeof(struct iwm_rx_packet), GFP_KERNEL);
366 if (!packet) {
367 IWM_ERR(iwm, "Couldn't allocate packet\n");
368 return ERR_PTR(-ENOMEM);
369 }
370
371 packet->skb = dev_alloc_skb(size);
372 if (!packet->skb) {
373 IWM_ERR(iwm, "Couldn't allocate packet SKB\n");
374 kfree(packet);
375 return ERR_PTR(-ENOMEM);
376 }
377
378 packet->pkt_size = size;
379
380 skb_put(packet->skb, size);
381 memcpy(packet->skb->data, buf, size);
382 INIT_LIST_HEAD(&packet->node);
383 packet->id = id;
384
385 return packet;
386 }
387
iwm_rx_free(struct iwm_priv * iwm)388 void iwm_rx_free(struct iwm_priv *iwm)
389 {
390 struct iwm_rx_ticket_node *ticket, *nt;
391 struct iwm_rx_packet *packet, *np;
392 int i;
393
394 spin_lock(&iwm->ticket_lock);
395 list_for_each_entry_safe(ticket, nt, &iwm->rx_tickets, node) {
396 list_del(&ticket->node);
397 iwm_rx_ticket_node_free(ticket);
398 }
399 spin_unlock(&iwm->ticket_lock);
400
401 for (i = 0; i < IWM_RX_ID_HASH; i++) {
402 spin_lock(&iwm->packet_lock[i]);
403 list_for_each_entry_safe(packet, np, &iwm->rx_packets[i],
404 node) {
405 list_del(&packet->node);
406 kfree_skb(packet->skb);
407 kfree(packet);
408 }
409 spin_unlock(&iwm->packet_lock[i]);
410 }
411 }
412
iwm_ntf_rx_ticket(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)413 static int iwm_ntf_rx_ticket(struct iwm_priv *iwm, u8 *buf,
414 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
415 {
416 struct iwm_umac_notif_rx_ticket *ntf_rx_ticket =
417 (struct iwm_umac_notif_rx_ticket *)buf;
418 struct iwm_rx_ticket *ticket =
419 (struct iwm_rx_ticket *)ntf_rx_ticket->tickets;
420 int i, schedule_rx = 0;
421
422 for (i = 0; i < ntf_rx_ticket->num_tickets; i++) {
423 struct iwm_rx_ticket_node *ticket_node;
424
425 switch (le16_to_cpu(ticket->action)) {
426 case IWM_RX_TICKET_RELEASE:
427 case IWM_RX_TICKET_DROP:
428 /* We can push the packet to the stack */
429 ticket_node = iwm_rx_ticket_node_alloc(iwm, ticket);
430 if (IS_ERR(ticket_node))
431 return PTR_ERR(ticket_node);
432
433 IWM_DBG_RX(iwm, DBG, "TICKET %s(%d)\n",
434 __le16_to_cpu(ticket->action) ==
435 IWM_RX_TICKET_RELEASE ?
436 "RELEASE" : "DROP",
437 ticket->id);
438 spin_lock(&iwm->ticket_lock);
439 list_add_tail(&ticket_node->node, &iwm->rx_tickets);
440 spin_unlock(&iwm->ticket_lock);
441
442 /*
443 * We received an Rx ticket, most likely there's
444 * a packet pending for it, it's not worth going
445 * through the packet hash list to double check.
446 * Let's just fire the rx worker..
447 */
448 schedule_rx = 1;
449
450 break;
451
452 default:
453 IWM_ERR(iwm, "Invalid RX ticket action: 0x%x\n",
454 ticket->action);
455 }
456
457 ticket++;
458 }
459
460 if (schedule_rx)
461 queue_work(iwm->rx_wq, &iwm->rx_worker);
462
463 return 0;
464 }
465
iwm_ntf_rx_packet(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)466 static int iwm_ntf_rx_packet(struct iwm_priv *iwm, u8 *buf,
467 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
468 {
469 struct iwm_umac_wifi_in_hdr *wifi_hdr;
470 struct iwm_rx_packet *packet;
471 u16 id, buf_offset;
472 u32 packet_size;
473 u8 id_hash;
474
475 IWM_DBG_RX(iwm, DBG, "\n");
476
477 wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
478 id = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num);
479 buf_offset = sizeof(struct iwm_umac_wifi_in_hdr);
480 packet_size = buf_size - sizeof(struct iwm_umac_wifi_in_hdr);
481
482 IWM_DBG_RX(iwm, DBG, "CMD:0x%x, seqnum: %d, packet size: %d\n",
483 wifi_hdr->sw_hdr.cmd.cmd, id, packet_size);
484 IWM_DBG_RX(iwm, DBG, "Packet id: %d\n", id);
485 IWM_HEXDUMP(iwm, DBG, RX, "PACKET: ", buf + buf_offset, packet_size);
486
487 packet = iwm_rx_packet_alloc(iwm, buf + buf_offset, packet_size, id);
488 if (IS_ERR(packet))
489 return PTR_ERR(packet);
490
491 id_hash = IWM_RX_ID_GET_HASH(id);
492 spin_lock(&iwm->packet_lock[id_hash]);
493 list_add_tail(&packet->node, &iwm->rx_packets[id_hash]);
494 spin_unlock(&iwm->packet_lock[id_hash]);
495
496 /* We might (unlikely) have received the packet _after_ the ticket */
497 queue_work(iwm->rx_wq, &iwm->rx_worker);
498
499 return 0;
500 }
501
502 /* MLME handlers */
iwm_mlme_assoc_start(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)503 static int iwm_mlme_assoc_start(struct iwm_priv *iwm, u8 *buf,
504 unsigned long buf_size,
505 struct iwm_wifi_cmd *cmd)
506 {
507 struct iwm_umac_notif_assoc_start *start;
508
509 start = (struct iwm_umac_notif_assoc_start *)buf;
510
511 IWM_DBG_MLME(iwm, INFO, "Association with %pM Started, reason: %d\n",
512 start->bssid, le32_to_cpu(start->roam_reason));
513
514 wake_up_interruptible(&iwm->mlme_queue);
515
516 return 0;
517 }
518
iwm_is_open_wep_profile(struct iwm_priv * iwm)519 static u8 iwm_is_open_wep_profile(struct iwm_priv *iwm)
520 {
521 if ((iwm->umac_profile->sec.ucast_cipher == UMAC_CIPHER_TYPE_WEP_40 ||
522 iwm->umac_profile->sec.ucast_cipher == UMAC_CIPHER_TYPE_WEP_104) &&
523 (iwm->umac_profile->sec.ucast_cipher ==
524 iwm->umac_profile->sec.mcast_cipher) &&
525 (iwm->umac_profile->sec.auth_type == UMAC_AUTH_TYPE_OPEN))
526 return 1;
527
528 return 0;
529 }
530
iwm_mlme_assoc_complete(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)531 static int iwm_mlme_assoc_complete(struct iwm_priv *iwm, u8 *buf,
532 unsigned long buf_size,
533 struct iwm_wifi_cmd *cmd)
534 {
535 struct wiphy *wiphy = iwm_to_wiphy(iwm);
536 struct ieee80211_channel *chan;
537 struct iwm_umac_notif_assoc_complete *complete =
538 (struct iwm_umac_notif_assoc_complete *)buf;
539
540 IWM_DBG_MLME(iwm, INFO, "Association with %pM completed, status: %d\n",
541 complete->bssid, complete->status);
542
543 switch (le32_to_cpu(complete->status)) {
544 case UMAC_ASSOC_COMPLETE_SUCCESS:
545 chan = ieee80211_get_channel(wiphy,
546 ieee80211_channel_to_frequency(complete->channel,
547 complete->band == UMAC_BAND_2GHZ ?
548 IEEE80211_BAND_2GHZ :
549 IEEE80211_BAND_5GHZ));
550 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
551 /* Associated to a unallowed channel, disassociate. */
552 __iwm_invalidate_mlme_profile(iwm);
553 IWM_WARN(iwm, "Couldn't associate with %pM due to "
554 "channel %d is disabled. Check your local "
555 "regulatory setting.\n",
556 complete->bssid, complete->channel);
557 goto failure;
558 }
559
560 set_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
561 memcpy(iwm->bssid, complete->bssid, ETH_ALEN);
562 iwm->channel = complete->channel;
563
564 /* Internal roaming state, avoid notifying SME. */
565 if (!test_and_clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status)
566 && iwm->conf.mode == UMAC_MODE_BSS) {
567 cancel_delayed_work(&iwm->disconnect);
568 cfg80211_roamed(iwm_to_ndev(iwm), NULL,
569 complete->bssid,
570 iwm->req_ie, iwm->req_ie_len,
571 iwm->resp_ie, iwm->resp_ie_len,
572 GFP_KERNEL);
573 break;
574 }
575
576 iwm_link_on(iwm);
577
578 if (iwm->conf.mode == UMAC_MODE_IBSS)
579 goto ibss;
580
581 if (!test_bit(IWM_STATUS_RESETTING, &iwm->status))
582 cfg80211_connect_result(iwm_to_ndev(iwm),
583 complete->bssid,
584 iwm->req_ie, iwm->req_ie_len,
585 iwm->resp_ie, iwm->resp_ie_len,
586 WLAN_STATUS_SUCCESS,
587 GFP_KERNEL);
588 else
589 cfg80211_roamed(iwm_to_ndev(iwm), NULL,
590 complete->bssid,
591 iwm->req_ie, iwm->req_ie_len,
592 iwm->resp_ie, iwm->resp_ie_len,
593 GFP_KERNEL);
594 break;
595 case UMAC_ASSOC_COMPLETE_FAILURE:
596 failure:
597 clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
598 memset(iwm->bssid, 0, ETH_ALEN);
599 iwm->channel = 0;
600
601 /* Internal roaming state, avoid notifying SME. */
602 if (!test_and_clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status)
603 && iwm->conf.mode == UMAC_MODE_BSS) {
604 cancel_delayed_work(&iwm->disconnect);
605 break;
606 }
607
608 iwm_link_off(iwm);
609
610 if (iwm->conf.mode == UMAC_MODE_IBSS)
611 goto ibss;
612
613 if (!test_bit(IWM_STATUS_RESETTING, &iwm->status))
614 if (!iwm_is_open_wep_profile(iwm)) {
615 cfg80211_connect_result(iwm_to_ndev(iwm),
616 complete->bssid,
617 NULL, 0, NULL, 0,
618 WLAN_STATUS_UNSPECIFIED_FAILURE,
619 GFP_KERNEL);
620 } else {
621 /* Let's try shared WEP auth */
622 IWM_ERR(iwm, "Trying WEP shared auth\n");
623 schedule_work(&iwm->auth_retry_worker);
624 }
625 else
626 cfg80211_disconnected(iwm_to_ndev(iwm), 0, NULL, 0,
627 GFP_KERNEL);
628 break;
629 default:
630 break;
631 }
632
633 clear_bit(IWM_STATUS_RESETTING, &iwm->status);
634 return 0;
635
636 ibss:
637 cfg80211_ibss_joined(iwm_to_ndev(iwm), iwm->bssid, GFP_KERNEL);
638 clear_bit(IWM_STATUS_RESETTING, &iwm->status);
639 return 0;
640 }
641
iwm_mlme_profile_invalidate(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)642 static int iwm_mlme_profile_invalidate(struct iwm_priv *iwm, u8 *buf,
643 unsigned long buf_size,
644 struct iwm_wifi_cmd *cmd)
645 {
646 struct iwm_umac_notif_profile_invalidate *invalid;
647 u32 reason;
648
649 invalid = (struct iwm_umac_notif_profile_invalidate *)buf;
650 reason = le32_to_cpu(invalid->reason);
651
652 IWM_DBG_MLME(iwm, INFO, "Profile Invalidated. Reason: %d\n", reason);
653
654 if (reason != UMAC_PROFILE_INVALID_REQUEST &&
655 test_bit(IWM_STATUS_SME_CONNECTING, &iwm->status))
656 cfg80211_connect_result(iwm_to_ndev(iwm), NULL, NULL, 0, NULL,
657 0, WLAN_STATUS_UNSPECIFIED_FAILURE,
658 GFP_KERNEL);
659
660 clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status);
661 clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
662
663 iwm->umac_profile_active = false;
664 memset(iwm->bssid, 0, ETH_ALEN);
665 iwm->channel = 0;
666
667 iwm_link_off(iwm);
668
669 wake_up_interruptible(&iwm->mlme_queue);
670
671 return 0;
672 }
673
674 #define IWM_DISCONNECT_INTERVAL (5 * HZ)
675
iwm_mlme_connection_terminated(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)676 static int iwm_mlme_connection_terminated(struct iwm_priv *iwm, u8 *buf,
677 unsigned long buf_size,
678 struct iwm_wifi_cmd *cmd)
679 {
680 IWM_DBG_MLME(iwm, DBG, "Connection terminated\n");
681
682 schedule_delayed_work(&iwm->disconnect, IWM_DISCONNECT_INTERVAL);
683
684 return 0;
685 }
686
iwm_mlme_scan_complete(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)687 static int iwm_mlme_scan_complete(struct iwm_priv *iwm, u8 *buf,
688 unsigned long buf_size,
689 struct iwm_wifi_cmd *cmd)
690 {
691 int ret;
692 struct iwm_umac_notif_scan_complete *scan_complete =
693 (struct iwm_umac_notif_scan_complete *)buf;
694 u32 result = le32_to_cpu(scan_complete->result);
695
696 IWM_DBG_MLME(iwm, INFO, "type:0x%x result:0x%x seq:%d\n",
697 le32_to_cpu(scan_complete->type),
698 le32_to_cpu(scan_complete->result),
699 scan_complete->seq_num);
700
701 if (!test_and_clear_bit(IWM_STATUS_SCANNING, &iwm->status)) {
702 IWM_ERR(iwm, "Scan complete while device not scanning\n");
703 return -EIO;
704 }
705 if (!iwm->scan_request)
706 return 0;
707
708 ret = iwm_cfg80211_inform_bss(iwm);
709
710 cfg80211_scan_done(iwm->scan_request,
711 (result & UMAC_SCAN_RESULT_ABORTED) ? 1 : !!ret);
712 iwm->scan_request = NULL;
713
714 return ret;
715 }
716
iwm_mlme_update_sta_table(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)717 static int iwm_mlme_update_sta_table(struct iwm_priv *iwm, u8 *buf,
718 unsigned long buf_size,
719 struct iwm_wifi_cmd *cmd)
720 {
721 struct iwm_umac_notif_sta_info *umac_sta =
722 (struct iwm_umac_notif_sta_info *)buf;
723 struct iwm_sta_info *sta;
724 int i;
725
726 switch (le32_to_cpu(umac_sta->opcode)) {
727 case UMAC_OPCODE_ADD_MODIFY:
728 sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
729
730 IWM_DBG_MLME(iwm, INFO, "%s STA: ID = %d, Color = %d, "
731 "addr = %pM, qos = %d\n",
732 sta->valid ? "Modify" : "Add",
733 GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
734 GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
735 umac_sta->mac_addr,
736 umac_sta->flags & UMAC_STA_FLAG_QOS);
737
738 sta->valid = true;
739 sta->qos = umac_sta->flags & UMAC_STA_FLAG_QOS;
740 sta->color = GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR);
741 memcpy(sta->addr, umac_sta->mac_addr, ETH_ALEN);
742 break;
743 case UMAC_OPCODE_REMOVE:
744 IWM_DBG_MLME(iwm, INFO, "Remove STA: ID = %d, Color = %d, "
745 "addr = %pM\n",
746 GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
747 GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
748 umac_sta->mac_addr);
749
750 sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
751
752 if (!memcmp(sta->addr, umac_sta->mac_addr, ETH_ALEN))
753 sta->valid = false;
754
755 break;
756 case UMAC_OPCODE_CLEAR_ALL:
757 for (i = 0; i < IWM_STA_TABLE_NUM; i++)
758 iwm->sta_table[i].valid = false;
759
760 break;
761 default:
762 break;
763 }
764
765 return 0;
766 }
767
iwm_mlme_medium_lost(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)768 static int iwm_mlme_medium_lost(struct iwm_priv *iwm, u8 *buf,
769 unsigned long buf_size,
770 struct iwm_wifi_cmd *cmd)
771 {
772 struct wiphy *wiphy = iwm_to_wiphy(iwm);
773
774 IWM_DBG_NTF(iwm, DBG, "WiFi/WiMax coexistence radio is OFF\n");
775
776 wiphy_rfkill_set_hw_state(wiphy, true);
777
778 return 0;
779 }
780
iwm_mlme_update_bss_table(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)781 static int iwm_mlme_update_bss_table(struct iwm_priv *iwm, u8 *buf,
782 unsigned long buf_size,
783 struct iwm_wifi_cmd *cmd)
784 {
785 struct wiphy *wiphy = iwm_to_wiphy(iwm);
786 struct ieee80211_mgmt *mgmt;
787 struct iwm_umac_notif_bss_info *umac_bss =
788 (struct iwm_umac_notif_bss_info *)buf;
789 struct ieee80211_channel *channel;
790 struct ieee80211_supported_band *band;
791 struct iwm_bss_info *bss;
792 s32 signal;
793 int freq;
794 u16 frame_len = le16_to_cpu(umac_bss->frame_len);
795 size_t bss_len = sizeof(struct iwm_umac_notif_bss_info) + frame_len;
796
797 mgmt = (struct ieee80211_mgmt *)(umac_bss->frame_buf);
798
799 IWM_DBG_MLME(iwm, DBG, "New BSS info entry: %pM\n", mgmt->bssid);
800 IWM_DBG_MLME(iwm, DBG, "\tType: 0x%x\n", le32_to_cpu(umac_bss->type));
801 IWM_DBG_MLME(iwm, DBG, "\tTimestamp: %d\n",
802 le32_to_cpu(umac_bss->timestamp));
803 IWM_DBG_MLME(iwm, DBG, "\tTable Index: %d\n",
804 le16_to_cpu(umac_bss->table_idx));
805 IWM_DBG_MLME(iwm, DBG, "\tBand: %d\n", umac_bss->band);
806 IWM_DBG_MLME(iwm, DBG, "\tChannel: %d\n", umac_bss->channel);
807 IWM_DBG_MLME(iwm, DBG, "\tRSSI: %d\n", umac_bss->rssi);
808 IWM_DBG_MLME(iwm, DBG, "\tFrame Length: %d\n", frame_len);
809
810 list_for_each_entry(bss, &iwm->bss_list, node)
811 if (bss->bss->table_idx == umac_bss->table_idx)
812 break;
813
814 if (&bss->node != &iwm->bss_list) {
815 /* Remove the old BSS entry, we will add it back later. */
816 list_del(&bss->node);
817 kfree(bss->bss);
818 } else {
819 /* New BSS entry */
820
821 bss = kzalloc(sizeof(struct iwm_bss_info), GFP_KERNEL);
822 if (!bss) {
823 IWM_ERR(iwm, "Couldn't allocate bss_info\n");
824 return -ENOMEM;
825 }
826 }
827
828 bss->bss = kzalloc(bss_len, GFP_KERNEL);
829 if (!bss->bss) {
830 kfree(bss);
831 IWM_ERR(iwm, "Couldn't allocate bss\n");
832 return -ENOMEM;
833 }
834
835 INIT_LIST_HEAD(&bss->node);
836 memcpy(bss->bss, umac_bss, bss_len);
837
838 if (umac_bss->band == UMAC_BAND_2GHZ)
839 band = wiphy->bands[IEEE80211_BAND_2GHZ];
840 else if (umac_bss->band == UMAC_BAND_5GHZ)
841 band = wiphy->bands[IEEE80211_BAND_5GHZ];
842 else {
843 IWM_ERR(iwm, "Invalid band: %d\n", umac_bss->band);
844 goto err;
845 }
846
847 freq = ieee80211_channel_to_frequency(umac_bss->channel, band->band);
848 channel = ieee80211_get_channel(wiphy, freq);
849 signal = umac_bss->rssi * 100;
850
851 bss->cfg_bss = cfg80211_inform_bss_frame(wiphy, channel,
852 mgmt, frame_len,
853 signal, GFP_KERNEL);
854 if (!bss->cfg_bss)
855 goto err;
856
857 list_add_tail(&bss->node, &iwm->bss_list);
858
859 return 0;
860 err:
861 kfree(bss->bss);
862 kfree(bss);
863
864 return -EINVAL;
865 }
866
iwm_mlme_remove_bss(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)867 static int iwm_mlme_remove_bss(struct iwm_priv *iwm, u8 *buf,
868 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
869 {
870 struct iwm_umac_notif_bss_removed *bss_rm =
871 (struct iwm_umac_notif_bss_removed *)buf;
872 struct iwm_bss_info *bss, *next;
873 u16 table_idx;
874 int i;
875
876 for (i = 0; i < le32_to_cpu(bss_rm->count); i++) {
877 table_idx = le16_to_cpu(bss_rm->entries[i]) &
878 IWM_BSS_REMOVE_INDEX_MSK;
879 list_for_each_entry_safe(bss, next, &iwm->bss_list, node)
880 if (bss->bss->table_idx == cpu_to_le16(table_idx)) {
881 struct ieee80211_mgmt *mgmt;
882
883 mgmt = (struct ieee80211_mgmt *)
884 (bss->bss->frame_buf);
885 IWM_DBG_MLME(iwm, ERR, "BSS removed: %pM\n",
886 mgmt->bssid);
887 list_del(&bss->node);
888 kfree(bss->bss);
889 kfree(bss);
890 }
891 }
892
893 return 0;
894 }
895
iwm_mlme_mgt_frame(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)896 static int iwm_mlme_mgt_frame(struct iwm_priv *iwm, u8 *buf,
897 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
898 {
899 struct iwm_umac_notif_mgt_frame *mgt_frame =
900 (struct iwm_umac_notif_mgt_frame *)buf;
901 struct ieee80211_mgmt *mgt = (struct ieee80211_mgmt *)mgt_frame->frame;
902
903 IWM_HEXDUMP(iwm, DBG, MLME, "MGT: ", mgt_frame->frame,
904 le16_to_cpu(mgt_frame->len));
905
906 if (ieee80211_is_assoc_req(mgt->frame_control)) {
907 iwm->req_ie_len = le16_to_cpu(mgt_frame->len)
908 - offsetof(struct ieee80211_mgmt,
909 u.assoc_req.variable);
910 kfree(iwm->req_ie);
911 iwm->req_ie = kmemdup(mgt->u.assoc_req.variable,
912 iwm->req_ie_len, GFP_KERNEL);
913 } else if (ieee80211_is_reassoc_req(mgt->frame_control)) {
914 iwm->req_ie_len = le16_to_cpu(mgt_frame->len)
915 - offsetof(struct ieee80211_mgmt,
916 u.reassoc_req.variable);
917 kfree(iwm->req_ie);
918 iwm->req_ie = kmemdup(mgt->u.reassoc_req.variable,
919 iwm->req_ie_len, GFP_KERNEL);
920 } else if (ieee80211_is_assoc_resp(mgt->frame_control)) {
921 iwm->resp_ie_len = le16_to_cpu(mgt_frame->len)
922 - offsetof(struct ieee80211_mgmt,
923 u.assoc_resp.variable);
924 kfree(iwm->resp_ie);
925 iwm->resp_ie = kmemdup(mgt->u.assoc_resp.variable,
926 iwm->resp_ie_len, GFP_KERNEL);
927 } else if (ieee80211_is_reassoc_resp(mgt->frame_control)) {
928 iwm->resp_ie_len = le16_to_cpu(mgt_frame->len)
929 - offsetof(struct ieee80211_mgmt,
930 u.reassoc_resp.variable);
931 kfree(iwm->resp_ie);
932 iwm->resp_ie = kmemdup(mgt->u.reassoc_resp.variable,
933 iwm->resp_ie_len, GFP_KERNEL);
934 } else {
935 IWM_ERR(iwm, "Unsupported management frame: 0x%x",
936 le16_to_cpu(mgt->frame_control));
937 return 0;
938 }
939
940 return 0;
941 }
942
iwm_ntf_mlme(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)943 static int iwm_ntf_mlme(struct iwm_priv *iwm, u8 *buf,
944 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
945 {
946 struct iwm_umac_notif_wifi_if *notif =
947 (struct iwm_umac_notif_wifi_if *)buf;
948
949 switch (notif->status) {
950 case WIFI_IF_NTFY_ASSOC_START:
951 return iwm_mlme_assoc_start(iwm, buf, buf_size, cmd);
952 case WIFI_IF_NTFY_ASSOC_COMPLETE:
953 return iwm_mlme_assoc_complete(iwm, buf, buf_size, cmd);
954 case WIFI_IF_NTFY_PROFILE_INVALIDATE_COMPLETE:
955 return iwm_mlme_profile_invalidate(iwm, buf, buf_size, cmd);
956 case WIFI_IF_NTFY_CONNECTION_TERMINATED:
957 return iwm_mlme_connection_terminated(iwm, buf, buf_size, cmd);
958 case WIFI_IF_NTFY_SCAN_COMPLETE:
959 return iwm_mlme_scan_complete(iwm, buf, buf_size, cmd);
960 case WIFI_IF_NTFY_STA_TABLE_CHANGE:
961 return iwm_mlme_update_sta_table(iwm, buf, buf_size, cmd);
962 case WIFI_IF_NTFY_EXTENDED_IE_REQUIRED:
963 IWM_DBG_MLME(iwm, DBG, "Extended IE required\n");
964 break;
965 case WIFI_IF_NTFY_RADIO_PREEMPTION:
966 return iwm_mlme_medium_lost(iwm, buf, buf_size, cmd);
967 case WIFI_IF_NTFY_BSS_TRK_TABLE_CHANGED:
968 return iwm_mlme_update_bss_table(iwm, buf, buf_size, cmd);
969 case WIFI_IF_NTFY_BSS_TRK_ENTRIES_REMOVED:
970 return iwm_mlme_remove_bss(iwm, buf, buf_size, cmd);
971 break;
972 case WIFI_IF_NTFY_MGMT_FRAME:
973 return iwm_mlme_mgt_frame(iwm, buf, buf_size, cmd);
974 case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_START:
975 case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_COMPLETE:
976 case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_START:
977 case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_RESULT:
978 case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_START:
979 case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_COMPLETE:
980 case WIFI_DBG_IF_NTFY_CNCT_ATC_START:
981 case WIFI_DBG_IF_NTFY_COEX_NOTIFICATION:
982 case WIFI_DBG_IF_NTFY_COEX_HANDLE_ENVELOP:
983 case WIFI_DBG_IF_NTFY_COEX_HANDLE_RELEASE_ENVELOP:
984 IWM_DBG_MLME(iwm, DBG, "MLME debug notification: 0x%x\n",
985 notif->status);
986 break;
987 default:
988 IWM_ERR(iwm, "Unhandled notification: 0x%x\n", notif->status);
989 break;
990 }
991
992 return 0;
993 }
994
995 #define IWM_STATS_UPDATE_INTERVAL (2 * HZ)
996
iwm_ntf_statistics(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)997 static int iwm_ntf_statistics(struct iwm_priv *iwm, u8 *buf,
998 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
999 {
1000 struct iwm_umac_notif_stats *stats = (struct iwm_umac_notif_stats *)buf;
1001 struct iw_statistics *wstats = &iwm->wstats;
1002 u16 max_rate = 0;
1003 int i;
1004
1005 IWM_DBG_MLME(iwm, DBG, "Statistics notification received\n");
1006
1007 if (test_bit(IWM_STATUS_ASSOCIATED, &iwm->status)) {
1008 for (i = 0; i < UMAC_NTF_RATE_SAMPLE_NR; i++) {
1009 max_rate = max_t(u16, max_rate,
1010 max(le16_to_cpu(stats->tx_rate[i]),
1011 le16_to_cpu(stats->rx_rate[i])));
1012 }
1013 /* UMAC passes rate info multiplies by 2 */
1014 iwm->rate = max_rate >> 1;
1015 }
1016 iwm->txpower = le32_to_cpu(stats->tx_power);
1017
1018 wstats->status = 0;
1019
1020 wstats->discard.nwid = le32_to_cpu(stats->rx_drop_other_bssid);
1021 wstats->discard.code = le32_to_cpu(stats->rx_drop_decode);
1022 wstats->discard.fragment = le32_to_cpu(stats->rx_drop_reassembly);
1023 wstats->discard.retries = le32_to_cpu(stats->tx_drop_max_retry);
1024
1025 wstats->miss.beacon = le32_to_cpu(stats->missed_beacons);
1026
1027 /* according to cfg80211 */
1028 if (stats->rssi_dbm < -110)
1029 wstats->qual.qual = 0;
1030 else if (stats->rssi_dbm > -40)
1031 wstats->qual.qual = 70;
1032 else
1033 wstats->qual.qual = stats->rssi_dbm + 110;
1034
1035 wstats->qual.level = stats->rssi_dbm;
1036 wstats->qual.noise = stats->noise_dbm;
1037 wstats->qual.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
1038
1039 schedule_delayed_work(&iwm->stats_request, IWM_STATS_UPDATE_INTERVAL);
1040
1041 mod_timer(&iwm->watchdog, round_jiffies(jiffies + IWM_WATCHDOG_PERIOD));
1042
1043 return 0;
1044 }
1045
iwm_ntf_eeprom_proxy(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)1046 static int iwm_ntf_eeprom_proxy(struct iwm_priv *iwm, u8 *buf,
1047 unsigned long buf_size,
1048 struct iwm_wifi_cmd *cmd)
1049 {
1050 struct iwm_umac_cmd_eeprom_proxy *eeprom_proxy =
1051 (struct iwm_umac_cmd_eeprom_proxy *)
1052 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1053 struct iwm_umac_cmd_eeprom_proxy_hdr *hdr = &eeprom_proxy->hdr;
1054 u32 hdr_offset = le32_to_cpu(hdr->offset);
1055 u32 hdr_len = le32_to_cpu(hdr->len);
1056 u32 hdr_type = le32_to_cpu(hdr->type);
1057
1058 IWM_DBG_NTF(iwm, DBG, "type: 0x%x, len: %d, offset: 0x%x\n",
1059 hdr_type, hdr_len, hdr_offset);
1060
1061 if ((hdr_offset + hdr_len) > IWM_EEPROM_LEN)
1062 return -EINVAL;
1063
1064 switch (hdr_type) {
1065 case IWM_UMAC_CMD_EEPROM_TYPE_READ:
1066 memcpy(iwm->eeprom + hdr_offset, eeprom_proxy->buf, hdr_len);
1067 break;
1068 case IWM_UMAC_CMD_EEPROM_TYPE_WRITE:
1069 default:
1070 return -ENOTSUPP;
1071 }
1072
1073 return 0;
1074 }
1075
iwm_ntf_channel_info_list(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)1076 static int iwm_ntf_channel_info_list(struct iwm_priv *iwm, u8 *buf,
1077 unsigned long buf_size,
1078 struct iwm_wifi_cmd *cmd)
1079 {
1080 struct iwm_umac_cmd_get_channel_list *ch_list =
1081 (struct iwm_umac_cmd_get_channel_list *)
1082 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1083 struct wiphy *wiphy = iwm_to_wiphy(iwm);
1084 struct ieee80211_supported_band *band;
1085 int i;
1086
1087 band = wiphy->bands[IEEE80211_BAND_2GHZ];
1088
1089 for (i = 0; i < band->n_channels; i++) {
1090 unsigned long ch_mask_0 =
1091 le32_to_cpu(ch_list->ch[0].channels_mask);
1092 unsigned long ch_mask_2 =
1093 le32_to_cpu(ch_list->ch[2].channels_mask);
1094
1095 if (!test_bit(i, &ch_mask_0))
1096 band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
1097
1098 if (!test_bit(i, &ch_mask_2))
1099 band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
1100 }
1101
1102 band = wiphy->bands[IEEE80211_BAND_5GHZ];
1103
1104 for (i = 0; i < min(band->n_channels, 32); i++) {
1105 unsigned long ch_mask_1 =
1106 le32_to_cpu(ch_list->ch[1].channels_mask);
1107 unsigned long ch_mask_3 =
1108 le32_to_cpu(ch_list->ch[3].channels_mask);
1109
1110 if (!test_bit(i, &ch_mask_1))
1111 band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
1112
1113 if (!test_bit(i, &ch_mask_3))
1114 band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
1115 }
1116
1117 return 0;
1118 }
1119
iwm_ntf_stop_resume_tx(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)1120 static int iwm_ntf_stop_resume_tx(struct iwm_priv *iwm, u8 *buf,
1121 unsigned long buf_size,
1122 struct iwm_wifi_cmd *cmd)
1123 {
1124 struct iwm_umac_notif_stop_resume_tx *stp_res_tx =
1125 (struct iwm_umac_notif_stop_resume_tx *)buf;
1126 struct iwm_sta_info *sta_info;
1127 struct iwm_tid_info *tid_info;
1128 u8 sta_id = STA_ID_N_COLOR_ID(stp_res_tx->sta_id);
1129 u16 tid_msk = le16_to_cpu(stp_res_tx->stop_resume_tid_msk);
1130 int bit, ret = 0;
1131 bool stop = false;
1132
1133 IWM_DBG_NTF(iwm, DBG, "stop/resume notification:\n"
1134 "\tflags: 0x%x\n"
1135 "\tSTA id: %d\n"
1136 "\tTID bitmask: 0x%x\n",
1137 stp_res_tx->flags, stp_res_tx->sta_id,
1138 stp_res_tx->stop_resume_tid_msk);
1139
1140 if (stp_res_tx->flags & UMAC_STOP_TX_FLAG)
1141 stop = true;
1142
1143 sta_info = &iwm->sta_table[sta_id];
1144 if (!sta_info->valid) {
1145 IWM_ERR(iwm, "Stoping an invalid STA: %d %d\n",
1146 sta_id, stp_res_tx->sta_id);
1147 return -EINVAL;
1148 }
1149
1150 for_each_set_bit(bit, (unsigned long *)&tid_msk, IWM_UMAC_TID_NR) {
1151 tid_info = &sta_info->tid_info[bit];
1152
1153 mutex_lock(&tid_info->mutex);
1154 tid_info->stopped = stop;
1155 mutex_unlock(&tid_info->mutex);
1156
1157 if (!stop) {
1158 struct iwm_tx_queue *txq;
1159 int queue = iwm_tid_to_queue(bit);
1160
1161 if (queue < 0)
1162 continue;
1163
1164 txq = &iwm->txq[queue];
1165 /*
1166 * If we resume, we have to move our SKBs
1167 * back to the tx queue and queue some work.
1168 */
1169 spin_lock_bh(&txq->lock);
1170 skb_queue_splice_init(&txq->queue, &txq->stopped_queue);
1171 spin_unlock_bh(&txq->lock);
1172
1173 queue_work(txq->wq, &txq->worker);
1174 }
1175
1176 }
1177
1178 /* We send an ACK only for the stop case */
1179 if (stop)
1180 ret = iwm_send_umac_stop_resume_tx(iwm, stp_res_tx);
1181
1182 return ret;
1183 }
1184
iwm_ntf_wifi_if_wrapper(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)1185 static int iwm_ntf_wifi_if_wrapper(struct iwm_priv *iwm, u8 *buf,
1186 unsigned long buf_size,
1187 struct iwm_wifi_cmd *cmd)
1188 {
1189 struct iwm_umac_wifi_if *hdr;
1190
1191 if (cmd == NULL) {
1192 IWM_ERR(iwm, "Couldn't find expected wifi command\n");
1193 return -EINVAL;
1194 }
1195
1196 hdr = (struct iwm_umac_wifi_if *)cmd->buf.payload;
1197
1198 IWM_DBG_NTF(iwm, DBG, "WIFI_IF_WRAPPER cmd is delivered to UMAC: "
1199 "oid is 0x%x\n", hdr->oid);
1200
1201 set_bit(hdr->oid, &iwm->wifi_ntfy[0]);
1202 wake_up_interruptible(&iwm->wifi_ntfy_queue);
1203
1204 switch (hdr->oid) {
1205 case UMAC_WIFI_IF_CMD_SET_PROFILE:
1206 iwm->umac_profile_active = true;
1207 break;
1208 default:
1209 break;
1210 }
1211
1212 return 0;
1213 }
1214
1215 #define CT_KILL_DELAY (30 * HZ)
iwm_ntf_card_state(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)1216 static int iwm_ntf_card_state(struct iwm_priv *iwm, u8 *buf,
1217 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
1218 {
1219 struct wiphy *wiphy = iwm_to_wiphy(iwm);
1220 struct iwm_lmac_card_state *state = (struct iwm_lmac_card_state *)
1221 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1222 u32 flags = le32_to_cpu(state->flags);
1223
1224 IWM_INFO(iwm, "HW RF Kill %s, CT Kill %s\n",
1225 flags & IWM_CARD_STATE_HW_DISABLED ? "ON" : "OFF",
1226 flags & IWM_CARD_STATE_CTKILL_DISABLED ? "ON" : "OFF");
1227
1228 if (flags & IWM_CARD_STATE_CTKILL_DISABLED) {
1229 /*
1230 * We got a CTKILL event: We bring the interface down in
1231 * oder to cool the device down, and try to bring it up
1232 * 30 seconds later. If it's still too hot, we'll go through
1233 * this code path again.
1234 */
1235 cancel_delayed_work_sync(&iwm->ct_kill_delay);
1236 schedule_delayed_work(&iwm->ct_kill_delay, CT_KILL_DELAY);
1237 }
1238
1239 wiphy_rfkill_set_hw_state(wiphy, flags &
1240 (IWM_CARD_STATE_HW_DISABLED |
1241 IWM_CARD_STATE_CTKILL_DISABLED));
1242
1243 return 0;
1244 }
1245
iwm_rx_handle_wifi(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size)1246 static int iwm_rx_handle_wifi(struct iwm_priv *iwm, u8 *buf,
1247 unsigned long buf_size)
1248 {
1249 struct iwm_umac_wifi_in_hdr *wifi_hdr;
1250 struct iwm_wifi_cmd *cmd;
1251 u8 source, cmd_id;
1252 u16 seq_num;
1253 u32 count;
1254
1255 wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
1256 cmd_id = wifi_hdr->sw_hdr.cmd.cmd;
1257 source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE);
1258 if (source >= IWM_SRC_NUM) {
1259 IWM_CRIT(iwm, "invalid source %d\n", source);
1260 return -EINVAL;
1261 }
1262
1263 if (cmd_id == REPLY_RX_MPDU_CMD)
1264 trace_iwm_rx_packet(iwm, buf, buf_size);
1265 else if ((cmd_id == UMAC_NOTIFY_OPCODE_RX_TICKET) &&
1266 (source == UMAC_HDI_IN_SOURCE_FW))
1267 trace_iwm_rx_ticket(iwm, buf, buf_size);
1268 else
1269 trace_iwm_rx_wifi_cmd(iwm, wifi_hdr);
1270
1271 count = GET_VAL32(wifi_hdr->sw_hdr.meta_data, UMAC_FW_CMD_BYTE_COUNT);
1272 count += sizeof(struct iwm_umac_wifi_in_hdr) -
1273 sizeof(struct iwm_dev_cmd_hdr);
1274 if (count > buf_size) {
1275 IWM_CRIT(iwm, "count %d, buf size:%ld\n", count, buf_size);
1276 return -EINVAL;
1277 }
1278
1279 seq_num = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num);
1280
1281 IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x, seqnum: %d\n",
1282 cmd_id, source, seq_num);
1283
1284 /*
1285 * If this is a response to a previously sent command, there must
1286 * be a pending command for this sequence number.
1287 */
1288 cmd = iwm_get_pending_wifi_cmd(iwm, seq_num);
1289
1290 /* Notify the caller only for sync commands. */
1291 switch (source) {
1292 case UMAC_HDI_IN_SOURCE_FHRX:
1293 if (iwm->lmac_handlers[cmd_id] &&
1294 test_bit(cmd_id, &iwm->lmac_handler_map[0]))
1295 return iwm_notif_send(iwm, cmd, cmd_id, source,
1296 buf, count);
1297 break;
1298 case UMAC_HDI_IN_SOURCE_FW:
1299 if (iwm->umac_handlers[cmd_id] &&
1300 test_bit(cmd_id, &iwm->umac_handler_map[0]))
1301 return iwm_notif_send(iwm, cmd, cmd_id, source,
1302 buf, count);
1303 break;
1304 case UMAC_HDI_IN_SOURCE_UDMA:
1305 break;
1306 }
1307
1308 return iwm_rx_handle_resp(iwm, buf, count, cmd);
1309 }
1310
iwm_rx_handle_resp(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size,struct iwm_wifi_cmd * cmd)1311 int iwm_rx_handle_resp(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size,
1312 struct iwm_wifi_cmd *cmd)
1313 {
1314 u8 source, cmd_id;
1315 struct iwm_umac_wifi_in_hdr *wifi_hdr;
1316 int ret = 0;
1317
1318 wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
1319 cmd_id = wifi_hdr->sw_hdr.cmd.cmd;
1320
1321 source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE);
1322
1323 IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x\n", cmd_id, source);
1324
1325 switch (source) {
1326 case UMAC_HDI_IN_SOURCE_FHRX:
1327 if (iwm->lmac_handlers[cmd_id])
1328 ret = iwm->lmac_handlers[cmd_id]
1329 (iwm, buf, buf_size, cmd);
1330 break;
1331 case UMAC_HDI_IN_SOURCE_FW:
1332 if (iwm->umac_handlers[cmd_id])
1333 ret = iwm->umac_handlers[cmd_id]
1334 (iwm, buf, buf_size, cmd);
1335 break;
1336 case UMAC_HDI_IN_SOURCE_UDMA:
1337 ret = -EINVAL;
1338 break;
1339 }
1340
1341 kfree(cmd);
1342
1343 return ret;
1344 }
1345
iwm_rx_handle_nonwifi(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size)1346 static int iwm_rx_handle_nonwifi(struct iwm_priv *iwm, u8 *buf,
1347 unsigned long buf_size)
1348 {
1349 u8 seq_num;
1350 struct iwm_udma_in_hdr *hdr = (struct iwm_udma_in_hdr *)buf;
1351 struct iwm_nonwifi_cmd *cmd;
1352
1353 trace_iwm_rx_nonwifi_cmd(iwm, buf, buf_size);
1354 seq_num = GET_VAL32(hdr->cmd, UDMA_HDI_IN_CMD_NON_WIFI_HW_SEQ_NUM);
1355
1356 /*
1357 * We received a non wifi answer.
1358 * Let's check if there's a pending command for it, and if so
1359 * replace the command payload with the buffer, and then wake the
1360 * callers up.
1361 * That means we only support synchronised non wifi command response
1362 * schemes.
1363 */
1364 list_for_each_entry(cmd, &iwm->nonwifi_pending_cmd, pending)
1365 if (cmd->seq_num == seq_num) {
1366 cmd->resp_received = true;
1367 cmd->buf.len = buf_size;
1368 memcpy(cmd->buf.hdr, buf, buf_size);
1369 wake_up_interruptible(&iwm->nonwifi_queue);
1370 }
1371
1372 return 0;
1373 }
1374
iwm_rx_handle_umac(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size)1375 static int iwm_rx_handle_umac(struct iwm_priv *iwm, u8 *buf,
1376 unsigned long buf_size)
1377 {
1378 int ret = 0;
1379 u8 op_code;
1380 unsigned long buf_offset = 0;
1381 struct iwm_udma_in_hdr *hdr;
1382
1383 /*
1384 * To allow for a more efficient bus usage, UMAC
1385 * messages are encapsulated into UDMA ones. This
1386 * way we can have several UMAC messages in one bus
1387 * transfer.
1388 * A UDMA frame size is always aligned on 16 bytes,
1389 * and a UDMA frame must not start with a UMAC_PAD_TERMINAL
1390 * word. This is how we parse a bus frame into several
1391 * UDMA ones.
1392 */
1393 while (buf_offset < buf_size) {
1394
1395 hdr = (struct iwm_udma_in_hdr *)(buf + buf_offset);
1396
1397 if (iwm_rx_check_udma_hdr(hdr) < 0) {
1398 IWM_DBG_RX(iwm, DBG, "End of frame\n");
1399 break;
1400 }
1401
1402 op_code = GET_VAL32(hdr->cmd, UMAC_HDI_IN_CMD_OPCODE);
1403
1404 IWM_DBG_RX(iwm, DBG, "Op code: 0x%x\n", op_code);
1405
1406 if (op_code == UMAC_HDI_IN_OPCODE_WIFI) {
1407 ret |= iwm_rx_handle_wifi(iwm, buf + buf_offset,
1408 buf_size - buf_offset);
1409 } else if (op_code < UMAC_HDI_IN_OPCODE_NONWIFI_MAX) {
1410 if (GET_VAL32(hdr->cmd,
1411 UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) !=
1412 UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) {
1413 IWM_ERR(iwm, "Incorrect hw signature\n");
1414 return -EINVAL;
1415 }
1416 ret |= iwm_rx_handle_nonwifi(iwm, buf + buf_offset,
1417 buf_size - buf_offset);
1418 } else {
1419 IWM_ERR(iwm, "Invalid RX opcode: 0x%x\n", op_code);
1420 ret |= -EINVAL;
1421 }
1422
1423 buf_offset += iwm_rx_resp_size(hdr);
1424 }
1425
1426 return ret;
1427 }
1428
iwm_rx_handle(struct iwm_priv * iwm,u8 * buf,unsigned long buf_size)1429 int iwm_rx_handle(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size)
1430 {
1431 struct iwm_udma_in_hdr *hdr;
1432
1433 hdr = (struct iwm_udma_in_hdr *)buf;
1434
1435 switch (le32_to_cpu(hdr->cmd)) {
1436 case UMAC_REBOOT_BARKER:
1437 if (test_bit(IWM_STATUS_READY, &iwm->status)) {
1438 IWM_ERR(iwm, "Unexpected BARKER\n");
1439
1440 schedule_work(&iwm->reset_worker);
1441
1442 return 0;
1443 }
1444
1445 return iwm_notif_send(iwm, NULL, IWM_BARKER_REBOOT_NOTIFICATION,
1446 IWM_SRC_UDMA, buf, buf_size);
1447 case UMAC_ACK_BARKER:
1448 return iwm_notif_send(iwm, NULL, IWM_ACK_BARKER_NOTIFICATION,
1449 IWM_SRC_UDMA, NULL, 0);
1450 default:
1451 IWM_DBG_RX(iwm, DBG, "Received cmd: 0x%x\n", hdr->cmd);
1452 return iwm_rx_handle_umac(iwm, buf, buf_size);
1453 }
1454
1455 return 0;
1456 }
1457
1458 static const iwm_handler iwm_umac_handlers[] =
1459 {
1460 [UMAC_NOTIFY_OPCODE_ERROR] = iwm_ntf_error,
1461 [UMAC_NOTIFY_OPCODE_ALIVE] = iwm_ntf_umac_alive,
1462 [UMAC_NOTIFY_OPCODE_INIT_COMPLETE] = iwm_ntf_init_complete,
1463 [UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS] = iwm_ntf_wifi_status,
1464 [UMAC_NOTIFY_OPCODE_WIFI_IF_WRAPPER] = iwm_ntf_mlme,
1465 [UMAC_NOTIFY_OPCODE_PAGE_DEALLOC] = iwm_ntf_tx_credit_update,
1466 [UMAC_NOTIFY_OPCODE_RX_TICKET] = iwm_ntf_rx_ticket,
1467 [UMAC_CMD_OPCODE_RESET] = iwm_ntf_umac_reset,
1468 [UMAC_NOTIFY_OPCODE_STATS] = iwm_ntf_statistics,
1469 [UMAC_CMD_OPCODE_EEPROM_PROXY] = iwm_ntf_eeprom_proxy,
1470 [UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST] = iwm_ntf_channel_info_list,
1471 [UMAC_CMD_OPCODE_STOP_RESUME_STA_TX] = iwm_ntf_stop_resume_tx,
1472 [REPLY_RX_MPDU_CMD] = iwm_ntf_rx_packet,
1473 [UMAC_CMD_OPCODE_WIFI_IF_WRAPPER] = iwm_ntf_wifi_if_wrapper,
1474 };
1475
1476 static const iwm_handler iwm_lmac_handlers[] =
1477 {
1478 [REPLY_TX] = iwm_ntf_tx,
1479 [REPLY_ALIVE] = iwm_ntf_lmac_version,
1480 [CALIBRATION_RES_NOTIFICATION] = iwm_ntf_calib_res,
1481 [CALIBRATION_COMPLETE_NOTIFICATION] = iwm_ntf_calib_complete,
1482 [CALIBRATION_CFG_CMD] = iwm_ntf_calib_cfg,
1483 [REPLY_RX_MPDU_CMD] = iwm_ntf_rx_packet,
1484 [CARD_STATE_NOTIFICATION] = iwm_ntf_card_state,
1485 };
1486
iwm_rx_setup_handlers(struct iwm_priv * iwm)1487 void iwm_rx_setup_handlers(struct iwm_priv *iwm)
1488 {
1489 iwm->umac_handlers = (iwm_handler *) iwm_umac_handlers;
1490 iwm->lmac_handlers = (iwm_handler *) iwm_lmac_handlers;
1491 }
1492
iwm_remove_iv(struct sk_buff * skb,u32 hdr_total_len)1493 static void iwm_remove_iv(struct sk_buff *skb, u32 hdr_total_len)
1494 {
1495 struct ieee80211_hdr *hdr;
1496 unsigned int hdr_len;
1497
1498 hdr = (struct ieee80211_hdr *)skb->data;
1499
1500 if (!ieee80211_has_protected(hdr->frame_control))
1501 return;
1502
1503 hdr_len = ieee80211_hdrlen(hdr->frame_control);
1504 if (hdr_total_len <= hdr_len)
1505 return;
1506
1507 memmove(skb->data + (hdr_total_len - hdr_len), skb->data, hdr_len);
1508 skb_pull(skb, (hdr_total_len - hdr_len));
1509 }
1510
iwm_rx_adjust_packet(struct iwm_priv * iwm,struct iwm_rx_packet * packet,struct iwm_rx_ticket_node * ticket_node)1511 static void iwm_rx_adjust_packet(struct iwm_priv *iwm,
1512 struct iwm_rx_packet *packet,
1513 struct iwm_rx_ticket_node *ticket_node)
1514 {
1515 u32 payload_offset = 0, payload_len;
1516 struct iwm_rx_ticket *ticket = ticket_node->ticket;
1517 struct iwm_rx_mpdu_hdr *mpdu_hdr;
1518 struct ieee80211_hdr *hdr;
1519
1520 mpdu_hdr = (struct iwm_rx_mpdu_hdr *)packet->skb->data;
1521 payload_offset += sizeof(struct iwm_rx_mpdu_hdr);
1522 /* Padding is 0 or 2 bytes */
1523 payload_len = le16_to_cpu(mpdu_hdr->len) +
1524 (le16_to_cpu(ticket->flags) & IWM_RX_TICKET_PAD_SIZE_MSK);
1525 payload_len -= ticket->tail_len;
1526
1527 IWM_DBG_RX(iwm, DBG, "Packet adjusted, len:%d, offset:%d, "
1528 "ticket offset:%d ticket tail len:%d\n",
1529 payload_len, payload_offset, ticket->payload_offset,
1530 ticket->tail_len);
1531
1532 IWM_HEXDUMP(iwm, DBG, RX, "RAW: ", packet->skb->data, packet->skb->len);
1533
1534 skb_pull(packet->skb, payload_offset);
1535 skb_trim(packet->skb, payload_len);
1536
1537 iwm_remove_iv(packet->skb, ticket->payload_offset);
1538
1539 hdr = (struct ieee80211_hdr *) packet->skb->data;
1540 if (ieee80211_is_data_qos(hdr->frame_control)) {
1541 /* UMAC handed QOS_DATA frame with 2 padding bytes appended
1542 * to the qos_ctl field in IEEE 802.11 headers. */
1543 memmove(packet->skb->data + IEEE80211_QOS_CTL_LEN + 2,
1544 packet->skb->data,
1545 ieee80211_hdrlen(hdr->frame_control) -
1546 IEEE80211_QOS_CTL_LEN);
1547 hdr = (struct ieee80211_hdr *) skb_pull(packet->skb,
1548 IEEE80211_QOS_CTL_LEN + 2);
1549 hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
1550 }
1551
1552 IWM_HEXDUMP(iwm, DBG, RX, "ADJUSTED: ",
1553 packet->skb->data, packet->skb->len);
1554 }
1555
classify8023(struct sk_buff * skb)1556 static void classify8023(struct sk_buff *skb)
1557 {
1558 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1559
1560 if (ieee80211_is_data_qos(hdr->frame_control)) {
1561 u8 *qc = ieee80211_get_qos_ctl(hdr);
1562 /* frame has qos control */
1563 skb->priority = *qc & IEEE80211_QOS_CTL_TID_MASK;
1564 } else {
1565 skb->priority = 0;
1566 }
1567 }
1568
iwm_rx_process_amsdu(struct iwm_priv * iwm,struct sk_buff * skb)1569 static void iwm_rx_process_amsdu(struct iwm_priv *iwm, struct sk_buff *skb)
1570 {
1571 struct wireless_dev *wdev = iwm_to_wdev(iwm);
1572 struct net_device *ndev = iwm_to_ndev(iwm);
1573 struct sk_buff_head list;
1574 struct sk_buff *frame;
1575
1576 IWM_HEXDUMP(iwm, DBG, RX, "A-MSDU: ", skb->data, skb->len);
1577
1578 __skb_queue_head_init(&list);
1579 ieee80211_amsdu_to_8023s(skb, &list, ndev->dev_addr, wdev->iftype, 0,
1580 true);
1581
1582 while ((frame = __skb_dequeue(&list))) {
1583 ndev->stats.rx_packets++;
1584 ndev->stats.rx_bytes += frame->len;
1585
1586 frame->protocol = eth_type_trans(frame, ndev);
1587 frame->ip_summed = CHECKSUM_NONE;
1588 memset(frame->cb, 0, sizeof(frame->cb));
1589
1590 if (netif_rx_ni(frame) == NET_RX_DROP) {
1591 IWM_ERR(iwm, "Packet dropped\n");
1592 ndev->stats.rx_dropped++;
1593 }
1594 }
1595 }
1596
iwm_rx_process_packet(struct iwm_priv * iwm,struct iwm_rx_packet * packet,struct iwm_rx_ticket_node * ticket_node)1597 static void iwm_rx_process_packet(struct iwm_priv *iwm,
1598 struct iwm_rx_packet *packet,
1599 struct iwm_rx_ticket_node *ticket_node)
1600 {
1601 int ret;
1602 struct sk_buff *skb = packet->skb;
1603 struct wireless_dev *wdev = iwm_to_wdev(iwm);
1604 struct net_device *ndev = iwm_to_ndev(iwm);
1605
1606 IWM_DBG_RX(iwm, DBG, "Processing packet ID %d\n", packet->id);
1607
1608 switch (le16_to_cpu(ticket_node->ticket->action)) {
1609 case IWM_RX_TICKET_RELEASE:
1610 IWM_DBG_RX(iwm, DBG, "RELEASE packet\n");
1611
1612 iwm_rx_adjust_packet(iwm, packet, ticket_node);
1613 skb->dev = iwm_to_ndev(iwm);
1614 classify8023(skb);
1615
1616 if (le16_to_cpu(ticket_node->ticket->flags) &
1617 IWM_RX_TICKET_AMSDU_MSK) {
1618 iwm_rx_process_amsdu(iwm, skb);
1619 break;
1620 }
1621
1622 ret = ieee80211_data_to_8023(skb, ndev->dev_addr, wdev->iftype);
1623 if (ret < 0) {
1624 IWM_DBG_RX(iwm, DBG, "Couldn't convert 802.11 header - "
1625 "%d\n", ret);
1626 kfree_skb(packet->skb);
1627 break;
1628 }
1629
1630 IWM_HEXDUMP(iwm, DBG, RX, "802.3: ", skb->data, skb->len);
1631
1632 ndev->stats.rx_packets++;
1633 ndev->stats.rx_bytes += skb->len;
1634
1635 skb->protocol = eth_type_trans(skb, ndev);
1636 skb->ip_summed = CHECKSUM_NONE;
1637 memset(skb->cb, 0, sizeof(skb->cb));
1638
1639 if (netif_rx_ni(skb) == NET_RX_DROP) {
1640 IWM_ERR(iwm, "Packet dropped\n");
1641 ndev->stats.rx_dropped++;
1642 }
1643 break;
1644 case IWM_RX_TICKET_DROP:
1645 IWM_DBG_RX(iwm, DBG, "DROP packet: 0x%x\n",
1646 le16_to_cpu(ticket_node->ticket->flags));
1647 kfree_skb(packet->skb);
1648 break;
1649 default:
1650 IWM_ERR(iwm, "Unknown ticket action: %d\n",
1651 le16_to_cpu(ticket_node->ticket->action));
1652 kfree_skb(packet->skb);
1653 }
1654
1655 kfree(packet);
1656 iwm_rx_ticket_node_free(ticket_node);
1657 }
1658
1659 /*
1660 * Rx data processing:
1661 *
1662 * We're receiving Rx packet from the LMAC, and Rx ticket from
1663 * the UMAC.
1664 * To forward a target data packet upstream (i.e. to the
1665 * kernel network stack), we must have received an Rx ticket
1666 * that tells us we're allowed to release this packet (ticket
1667 * action is IWM_RX_TICKET_RELEASE). The Rx ticket also indicates,
1668 * among other things, where valid data actually starts in the Rx
1669 * packet.
1670 */
iwm_rx_worker(struct work_struct * work)1671 void iwm_rx_worker(struct work_struct *work)
1672 {
1673 struct iwm_priv *iwm;
1674 struct iwm_rx_ticket_node *ticket, *next;
1675
1676 iwm = container_of(work, struct iwm_priv, rx_worker);
1677
1678 /*
1679 * We go through the tickets list and if there is a pending
1680 * packet for it, we push it upstream.
1681 * We stop whenever a ticket is missing its packet, as we're
1682 * supposed to send the packets in order.
1683 */
1684 spin_lock(&iwm->ticket_lock);
1685 list_for_each_entry_safe(ticket, next, &iwm->rx_tickets, node) {
1686 struct iwm_rx_packet *packet =
1687 iwm_rx_packet_get(iwm, le16_to_cpu(ticket->ticket->id));
1688
1689 if (!packet) {
1690 IWM_DBG_RX(iwm, DBG, "Skip rx_work: Wait for ticket %d "
1691 "to be handled first\n",
1692 le16_to_cpu(ticket->ticket->id));
1693 break;
1694 }
1695
1696 list_del(&ticket->node);
1697 iwm_rx_process_packet(iwm, packet, ticket);
1698 }
1699 spin_unlock(&iwm->ticket_lock);
1700 }
1701
1702