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