]> Git Repo - esp-hosted.git/blob - esp_hosted_ng/host/main.c
Merge branch 'bugfix/wow_triggers' into 'master'
[esp-hosted.git] / esp_hosted_ng / host / main.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Espressif Systems Wireless LAN device driver
4  *
5  * SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD
6  *
7  */
8 #include "utils.h"
9 #include <linux/init.h>
10 #include <linux/module.h>
11 #include <linux/kernel.h>
12 #include <linux/gpio.h>
13 #include <linux/igmp.h>
14
15 #include "esp.h"
16 #include "esp_if.h"
17 #include "esp_bt_api.h"
18 #include "esp_api.h"
19 #include "esp_cmd.h"
20 #include "esp_kernel_port.h"
21
22 #include "esp_cfg80211.h"
23 #include "esp_stats.h"
24
25 #define RELEASE_VERSION "1.0.3"
26 #define HOST_GPIO_PIN_INVALID -1
27 #define CONFIG_ALLOW_MULTICAST_WAKEUP 1
28 static int resetpin = HOST_GPIO_PIN_INVALID;
29 static u32 clockspeed = 0;
30 extern u8 ap_bssid[MAC_ADDR_LEN];
31 extern volatile u8 host_sleep;
32 u32 raw_tp_mode = 0;
33
34 module_param(resetpin, int, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
35 MODULE_PARM_DESC(resetpin, "Host's GPIO pin number which is connected to ESP32's EN to reset ESP32 device");
36
37 module_param(clockspeed, uint, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
38 MODULE_PARM_DESC(clockspeed, "Hosts clock speed in MHz");
39
40 module_param(raw_tp_mode, uint, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
41 MODULE_PARM_DESC(raw_tp_mode, "Mode choosed to test raw throughput");
42
43 static void deinit_adapter(void);
44
45
46 struct multicast_list mcast_list = {0};
47 struct esp_adapter adapter;
48 /*struct esp_device esp_dev;*/
49
50 struct esp_adapter *esp_get_adapter(void)
51 {
52         return &adapter;
53 }
54
55 void esp_process_new_packet_intr(struct esp_adapter *adapter)
56 {
57         if (adapter)
58                 queue_work(adapter->if_rx_workqueue, &adapter->if_rx_work);
59 }
60
61 static int process_tx_packet(struct sk_buff *skb)
62 {
63         struct esp_wifi_device *priv = NULL;
64         struct esp_skb_cb *cb = NULL;
65         struct esp_payload_header *payload_header = NULL;
66         struct sk_buff *new_skb = NULL;
67         int ret = 0;
68         u8 pad_len = 0, realloc_skb = 0;
69         u16 len = 0;
70         u16 total_len = 0;
71         static u8 c;
72         u8 *pos = NULL;
73
74         c++;
75         /* Get the priv */
76         cb = (struct esp_skb_cb *) skb->cb;
77         priv = cb->priv;
78
79         if (!priv) {
80                 dev_kfree_skb(skb);
81                 esp_info("No priv\n");
82                 return NETDEV_TX_OK;
83         }
84
85         if (netif_queue_stopped((const struct net_device *) priv->ndev)) {
86                 esp_info("Netif queue stopped\n");
87                 return NETDEV_TX_BUSY;
88         }
89
90         if (host_sleep) {
91                 return NETDEV_TX_BUSY;
92         }
93
94         len = skb->len;
95
96         /* Create space for payload header */
97         pad_len = sizeof(struct esp_payload_header);
98
99         total_len = len + pad_len;
100
101         /* Align buffer length */
102         pad_len += SKB_DATA_ADDR_ALIGNMENT - (total_len % SKB_DATA_ADDR_ALIGNMENT);
103
104         if (skb_headroom(skb) < pad_len) {
105                 /* Headroom is not sufficient */
106                 realloc_skb = 1;
107         }
108
109         if (realloc_skb || !IS_ALIGNED((unsigned long) skb->data, SKB_DATA_ADDR_ALIGNMENT)) {
110                 /* Realloc SKB */
111                 if (skb_linearize(skb)) {
112                         priv->stats.tx_errors++;
113                         dev_kfree_skb(skb);
114                         esp_err("Failed to linearize SKB");
115                         return NETDEV_TX_OK;
116                 }
117
118                 new_skb = esp_alloc_skb(skb->len + pad_len);
119
120                 if (!new_skb) {
121                         esp_err("Failed to allocate SKB");
122                         priv->stats.tx_errors++;
123                         dev_kfree_skb(skb);
124                         return NETDEV_TX_OK;
125                 }
126
127                 pos = new_skb->data;
128                 pos += pad_len;
129
130                 /* Populate new SKB */
131                 skb_copy_from_linear_data(skb, pos, skb->len);
132                 skb_put(new_skb, skb->len + pad_len);
133
134                 /* Replace old SKB */
135                 dev_kfree_skb_any(skb);
136                 skb = new_skb;
137         } else {
138                 /* Realloc is not needed, Make space for interface header */
139                 skb_push(skb, pad_len);
140         }
141
142         /* Set payload header */
143         payload_header = (struct esp_payload_header *) skb->data;
144         memset(payload_header, 0, pad_len);
145
146         payload_header->if_type = priv->if_type;
147         payload_header->if_num = priv->if_num;
148         payload_header->len = cpu_to_le16(len);
149         payload_header->offset = cpu_to_le16(pad_len);
150         payload_header->packet_type = PACKET_TYPE_DATA;
151
152         if (adapter.capabilities & ESP_CHECKSUM_ENABLED)
153                 payload_header->checksum = cpu_to_le16(compute_checksum(skb->data, (len + pad_len)));
154
155         if (!priv->stop_data) {
156                 ret = esp_send_packet(priv->adapter, skb);
157
158                 if (ret) {
159                         esp_verbose("Failed to send SKB");
160                         priv->stats.tx_errors++;
161                 } else {
162                         priv->stats.tx_packets++;
163                         priv->stats.tx_bytes += skb->len;
164                 }
165         } else {
166                 dev_kfree_skb_any(skb);
167                 priv->stats.tx_dropped++;
168         }
169
170         return 0;
171 }
172
173 void esp_port_open(struct esp_wifi_device *priv)
174 {
175         priv->port_open = 1;
176         priv->stop_data = 0;
177 }
178
179 void esp_port_close(struct esp_wifi_device *priv)
180 {
181         if (!priv)
182                 return;
183
184         priv->port_open = 0;
185         priv->stop_data = 1;
186 }
187
188 void print_capabilities(u32 cap)
189 {
190         esp_info("Capabilities: 0x%x. Features supported are:\n", cap);
191         if (cap & ESP_WLAN_SDIO_SUPPORT)
192                 esp_info("\t * WLAN on SDIO\n");
193         else if (cap & ESP_WLAN_SPI_SUPPORT)
194                 esp_info("\t * WLAN on SPI\n");
195
196         if ((cap & ESP_BT_UART_SUPPORT) ||
197                     (cap & ESP_BT_SDIO_SUPPORT) ||
198                     (cap & ESP_BT_SPI_SUPPORT)) {
199                 esp_info("\t * BT/BLE\n");
200                 if (cap & ESP_BT_UART_SUPPORT)
201                         esp_info("\t   - HCI over UART\n");
202                 if (cap & ESP_BT_SDIO_SUPPORT)
203                         esp_info("\t   - HCI over SDIO\n");
204                 if (cap & ESP_BT_SPI_SUPPORT)
205                         esp_info("\t   - HCI over SPI\n");
206
207                 if ((cap & ESP_BLE_ONLY_SUPPORT) && (cap & ESP_BR_EDR_ONLY_SUPPORT))
208                         esp_info("\t   - BT/BLE dual mode\n");
209                 else if (cap & ESP_BLE_ONLY_SUPPORT)
210                         esp_info("\t   - BLE only\n");
211                 else if (cap & ESP_BR_EDR_ONLY_SUPPORT)
212                         esp_info("\t   - BR EDR only\n");
213         }
214 }
215
216 void init_bt(struct esp_adapter *adapter)
217 {
218
219         if ((adapter->capabilities & ESP_BT_SPI_SUPPORT) ||
220                 (adapter->capabilities & ESP_BT_SDIO_SUPPORT)) {
221                 msleep(200);
222                 esp_info("ESP Bluetooth init\n");
223                 esp_init_bt(adapter);
224         }
225 }
226
227 static int check_esp_version(struct fw_version *ver)
228 {
229         esp_info("ESP Firmware version: %u.%u.%u\n",
230                         ver->major1, ver->major2, ver->minor);
231         if (!ver->major1) {
232                 esp_err("Incompatible ESP firmware release detected, Please use correct ESP-Hosted branch/compatible release\n");
233                 return -1;
234         }
235         return 0;
236 }
237
238 static void print_reset_reason(uint32_t reason)
239 {
240         switch (reason)
241         {
242                 case 1: esp_info("POWERON_RESET\n"); break;          /**<1, Vbat power on reset*/
243                 case 3: esp_info("SW_RESET\n"); break;               /**<3, Software reset digital core*/
244                 case 4: esp_info("OWDT_RESET\n"); break;             /**<4, Legacy watch dog reset digital core*/
245                 case 5: esp_info("DEEPSLEEP_RESET\n"); break;        /**<5, Deep Sleep reset digital core*/
246                 case 6: esp_info("SDIO_RESET\n"); break;             /**<6, Reset by SLC module, reset digital core*/
247                 case 7: esp_info("TG0WDT_SYS_RESET\n"); break;       /**<7, Timer Group0 Watch dog reset digital core*/
248                 case 8: esp_info("TG1WDT_SYS_RESET\n"); break;       /**<8, Timer Group1 Watch dog reset digital core*/
249                 case 9: esp_info("RTCWDT_SYS_RESET\n"); break;       /**<9, RTC Watch dog Reset digital core*/
250                 case 10: esp_info("INTRUSION_RESET\n"); break;       /**<10, Instrusion tested to reset CPU*/
251                 case 11: esp_info("TGWDT_CPU_RESET\n"); break;       /**<11, Time Group reset CPU*/
252                 case 12: esp_info("SW_CPU_RESET\n"); break;          /**<12, Software reset CPU*/
253                 case 13: esp_info("RTCWDT_CPU_RESET\n"); break;      /**<13, RTC Watch dog Reset CPU*/
254                 case 14: esp_info("EXT_CPU_RESET\n"); break;         /**<14, for APP CPU, reseted by PRO CPU*/
255                 case 15: esp_info("RTCWDT_BROWN_OUT_RESET\n"); break;/**<15, Reset when the vdd voltage is not stable*/
256                 case 16: esp_info("RTCWDT_RTC_RESET\n"); break;      /**<16, RTC Watch dog reset digital core and rtc module*/
257                 default: esp_info("Unknown[%u]\n", reason); break;
258         }
259 }
260
261 static int process_fw_data(struct fw_data *fw_p, int tag_len)
262 {
263         if (tag_len != sizeof(struct fw_data)) {
264                 esp_err("Length not matching to firmware data size\n");
265                 return -1;
266         }
267
268         esp_info("ESP chipset's last reset cause:\n");
269         print_reset_reason(le32_to_cpu(fw_p->last_reset_reason));
270
271         return check_esp_version(&fw_p->version);
272 }
273
274 int process_event_esp_bootup(struct esp_adapter *adapter, u8 *evt_buf, u8 len)
275 {
276         int len_left = len, tag_len, ret = 0;
277         u8 *pos;
278
279         if (!adapter || !evt_buf)
280                 return -1;
281
282         if (len_left >= 64) {
283                 esp_info("ESP init event len looks unexpected: %u (>=64)\n", len_left);
284                 esp_info("You probably facing timing mismatch at transport layer\n");
285         }
286
287         clear_bit(ESP_INIT_DONE, &adapter->state_flags);
288         /* Deinit module if already initialized */
289         esp_deinit_module(adapter);
290
291         pos = evt_buf;
292
293         while (len_left > 0) {
294                 tag_len = *(pos + 1);
295
296                 esp_info("Bootup Event tag: %d\n", *pos);
297
298                 switch (*pos) {
299                 case ESP_BOOTUP_CAPABILITY:
300                         adapter->capabilities = *(pos + 2);
301                         break;
302                 case ESP_BOOTUP_FIRMWARE_CHIP_ID:
303                         ret = esp_validate_chipset(adapter, *(pos + 2));
304                         break;
305                 case ESP_BOOTUP_FW_DATA:
306                         ret = process_fw_data((struct fw_data *)(pos + 2), tag_len);
307                         break;
308                 case ESP_BOOTUP_SPI_CLK_MHZ:
309                         ret = esp_adjust_spi_clock(adapter, *(pos + 2));
310                         break;
311                 default:
312                         esp_warn("Unsupported tag=%x in bootup event\n", *pos);
313                 }
314
315                 if (ret < 0) {
316                         esp_err("failed to process tag=%x in bootup event\n", *pos);
317                         return -1;
318                 }
319                 pos += (tag_len + 2);
320                 len_left -= (tag_len + 2);
321         }
322
323         if (esp_add_card(adapter)) {
324                 esp_err("network iterface init failed\n");
325                 return -1;
326         }
327         init_bt(adapter);
328
329         if (raw_tp_mode !=0) {
330 #if TEST_RAW_TP
331                 process_test_capabilities(raw_tp_mode);
332                 esp_init_raw_tp(adapter);
333 #else
334                 esp_err("RAW TP mode selected but not enabled\n");
335                 return -1;
336 #endif
337         }
338         set_bit(ESP_INIT_DONE, &adapter->state_flags);
339         print_capabilities(adapter->capabilities);
340
341         return 0;
342 }
343
344 static int esp_open(struct net_device *ndev)
345 {
346         return 0;
347 }
348
349 static int esp_stop(struct net_device *ndev)
350 {
351         return 0;
352 }
353
354 static struct net_device_stats *esp_get_stats(struct net_device *ndev)
355 {
356         struct esp_wifi_device *priv = netdev_priv(ndev);
357
358         if (!priv)
359                 return NULL;
360
361         return &priv->stats;
362 }
363
364 static int esp_set_mac_address(struct net_device *ndev, void *data)
365 {
366         struct esp_wifi_device *priv = netdev_priv(ndev);
367         struct sockaddr *sa = (struct sockaddr *)data;
368         int ret;
369
370         if (!priv || !priv->adapter)
371                 return -EINVAL;
372
373         esp_info("%u "MACSTR"\n", __LINE__, MAC2STR(sa->sa_data));
374
375         ret = cmd_set_mac(priv, sa->sa_data);
376
377         if (ret == 0)
378                 eth_hw_addr_set(ndev, priv->mac_address/*mac_addr->sa_data*/);
379
380         return ret;
381 }
382
383 static void esp_set_rx_mode(struct net_device *ndev)
384 {
385         struct esp_adapter *adapter = esp_get_adapter();
386
387         schedule_work(&adapter->mac_flter_work);
388 }
389
390 static int esp_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)
391 {
392         struct esp_wifi_device *priv = NULL;
393         struct esp_skb_cb *cb = NULL;
394
395         if (!skb || !ndev)
396                 return NETDEV_TX_OK;
397
398         priv = netdev_priv(ndev);
399         if (!priv) {
400                 dev_kfree_skb(skb);
401                 return NETDEV_TX_OK;
402         }
403
404         if (!priv->port_open) {
405                 priv->stats.tx_dropped++;
406                 esp_verbose("Port not yet open\n");
407                 dev_kfree_skb(skb);
408                 return NETDEV_TX_OK;
409         }
410
411         if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
412                 esp_err("Bad len %d\n", skb->len);
413                 priv->stats.tx_dropped++;
414                 dev_kfree_skb(skb);
415                 return NETDEV_TX_OK;
416         }
417
418         cb = (struct esp_skb_cb *) skb->cb;
419         cb->priv = priv;
420
421         return process_tx_packet(skb);
422 }
423
424 static const struct net_device_ops esp_netdev_ops = {
425         .ndo_open = esp_open,
426         .ndo_stop = esp_stop,
427         .ndo_start_xmit = esp_hard_start_xmit,
428         .ndo_set_mac_address = esp_set_mac_address,
429         .ndo_validate_addr = eth_validate_addr,
430         .ndo_get_stats = esp_get_stats,
431         .ndo_set_rx_mode = esp_set_rx_mode,
432 };
433
434
435 void esp_init_priv(struct net_device *ndev)
436 {
437         ndev->netdev_ops = &esp_netdev_ops;
438         ndev->needed_headroom = roundup(sizeof(struct esp_payload_header) +
439                         INTERFACE_HEADER_PADDING, 4);
440 }
441
442 static int esp_add_network_ifaces(struct esp_adapter *adapter)
443 {
444         struct wireless_dev *wdev = NULL;
445
446         if (!adapter) {
447                 esp_info("adapter not yet init\n");
448                 return -EINVAL;
449         }
450
451         rtnl_lock();
452         wdev = esp_cfg80211_add_iface(adapter->wiphy, "espsta%d", 1, NL80211_IFTYPE_STATION, NULL);
453         rtnl_unlock();
454
455         /* Return success if network added successfully */
456         if (wdev)
457                 return 0;
458
459         return -1;
460 }
461
462 int esp_init_raw_tp(struct esp_adapter *adapter)
463 {
464         RET_ON_FAIL(cmd_init_raw_tp_task_timer(adapter->priv[ESP_STA_NW_IF]));
465         return 0;
466 }
467
468 int esp_add_card(struct esp_adapter *adapter)
469 {
470         RET_ON_FAIL(esp_commands_setup(adapter));
471         RET_ON_FAIL(esp_add_wiphy(adapter));
472         RET_ON_FAIL(esp_add_network_ifaces(adapter));
473
474         return 0;
475 }
476
477 static int esp_remove_network_ifaces(struct esp_adapter *adapter)
478 {
479         uint8_t iface_idx = 0;
480         struct net_device *ndev = NULL;
481         struct esp_wifi_device *priv = NULL;
482
483         for (iface_idx = 0; iface_idx < ESP_MAX_INTERFACE; iface_idx++) {
484
485                 priv = adapter->priv[iface_idx];
486                 if (!priv)
487                         continue;
488                 if (!test_bit(ESP_NETWORK_UP, &priv->priv_flags))
489                         continue;
490
491                 ndev = priv->ndev;
492 #if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 12, 0)
493                 if (ndev)
494                         ndev->needs_free_netdev = true;
495                 rtnl_lock();
496                 wiphy_lock(adapter->wiphy);
497                 cfg80211_unregister_wdev(&priv->wdev);
498                 wiphy_unlock(adapter->wiphy);
499                 rtnl_unlock();
500 #else
501                 if (ndev && ndev->reg_state == NETREG_REGISTERED) {
502                         unregister_netdev(ndev);
503                         free_netdev(ndev);
504                         ndev = NULL;
505                 }
506 #endif
507                 adapter->priv[iface_idx] = NULL;
508         }
509
510         return 0;
511 }
512
513 static int stop_network_iface(struct esp_wifi_device *priv)
514 {
515         struct net_device *ndev;
516
517         if (!priv)
518                 return 0;
519
520         if (!test_bit(ESP_NETWORK_UP, &priv->priv_flags))
521                 return 0;
522
523         esp_mark_scan_done_and_disconnect(priv, false);
524         esp_port_close(priv);
525
526         /* stop and unregister network */
527         ndev = priv->ndev;
528
529         if (ndev) {
530                 netif_carrier_off(ndev);
531                 netif_device_detach(ndev);
532
533                 unregister_inetaddr_notifier(&(priv->nb));
534         }
535
536         return 0;
537 }
538
539 int esp_stop_network_ifaces(struct esp_adapter *adapter)
540 {
541         uint8_t iface_idx = 0;
542
543         for (iface_idx = 0; iface_idx < ESP_MAX_INTERFACE; iface_idx++) {
544                 stop_network_iface(adapter->priv[iface_idx]);
545         }
546
547         rtnl_lock();
548         if (adapter->wiphy)
549                 cfg80211_shutdown_all_interfaces(adapter->wiphy);
550
551         rtnl_unlock();
552
553         return 0;
554 }
555
556 int esp_remove_card(struct esp_adapter *adapter)
557 {
558         if (!adapter) {
559                 return 0;
560         }
561
562         esp_stop_network_ifaces(adapter);
563         /* BT may have been initialized after fw bootup event, deinit it */
564         esp_deinit_bt(adapter);
565         esp_commands_teardown(adapter);
566         esp_remove_network_ifaces(adapter);
567         esp_remove_wiphy(adapter);
568
569         return 0;
570 }
571
572 struct esp_wifi_device *get_priv_from_payload_header(
573                 struct esp_payload_header *header)
574 {
575         struct esp_wifi_device *priv = NULL;
576         u8 i = 0;
577
578         if (!header)
579                 return NULL;
580
581         for (i = 0; i < ESP_MAX_INTERFACE; i++) {
582                 priv = adapter.priv[i];
583
584                 if (!priv)
585                         continue;
586
587                 if (priv->if_type == header->if_type &&
588                                 priv->if_num == header->if_num) {
589                         return priv;
590                 }
591         }
592         return NULL;
593 }
594
595 static void process_esp_bootup_event(struct esp_adapter *adapter,
596                 struct esp_internal_bootup_event *evt)
597 {
598         if (!adapter || !evt) {
599                 esp_err("Invalid arguments\n");
600                 return;
601         }
602
603         if (evt->header.status) {
604                 esp_err("Incorrect ESP bootup event\n");
605                 return;
606         }
607
608         esp_info("Received ESP bootup event\n");
609         process_event_esp_bootup(adapter, evt->data, evt->len);
610 }
611
612 static int process_internal_event(struct esp_adapter *adapter,
613                 struct sk_buff *skb)
614 {
615         struct event_header *header = NULL;
616
617         if (!skb || !adapter) {
618                 esp_err("Incorrect event data!\n");
619                 return -1;
620         }
621
622         header = (struct event_header *) (skb->data);
623
624         switch (header->event_code) {
625
626         case ESP_INTERNAL_BOOTUP_EVENT:
627                 process_esp_bootup_event(adapter,
628                         (struct esp_internal_bootup_event *)(skb->data));
629                 break;
630
631         default:
632                 esp_info("%u unhandled internal event[%u]\n",
633                                 __LINE__, header->event_code);
634                 break;
635         }
636
637         return 0;
638 }
639
640 static void process_rx_packet(struct esp_adapter *adapter, struct sk_buff *skb)
641 {
642         struct esp_wifi_device *priv = NULL;
643         struct esp_payload_header *payload_header = NULL;
644         u16 len = 0, offset = 0;
645         u16 rx_checksum = 0, checksum = 0;
646         struct hci_dev *hdev = adapter->hcidev;
647         u8 *type = NULL;
648         struct sk_buff *eap_skb = NULL;
649         struct ethhdr *eth = NULL;
650
651         if (!skb)
652                 return;
653
654         /* get the paload header */
655         payload_header = (struct esp_payload_header *) skb->data;
656
657         len = le16_to_cpu(payload_header->len);
658         offset = le16_to_cpu(payload_header->offset);
659
660         if (payload_header->reserved2 == 0xFF) {
661                 esp_hex_dump("Wake up packet: ", skb->data, len+offset);
662         }
663
664         if (adapter->capabilities & ESP_CHECKSUM_ENABLED) {
665                 rx_checksum = le16_to_cpu(payload_header->checksum);
666                 payload_header->checksum = 0;
667
668                 checksum = compute_checksum(skb->data, (len + offset));
669
670                 if (checksum != rx_checksum) {
671                         dev_kfree_skb_any(skb);
672                         return;
673                 }
674         }
675
676         /* chop off the header from skb */
677         skb_pull(skb, offset);
678
679         if (payload_header->if_type == ESP_STA_IF || payload_header->if_type == ESP_AP_IF) {
680
681                 /* retrieve priv based on payload header contents */
682                 priv = get_priv_from_payload_header(payload_header);
683
684                 if (!priv) {
685                         esp_err("Empty priv\n");
686                         dev_kfree_skb_any(skb);
687                         return;
688                 }
689
690                 if (payload_header->packet_type == PACKET_TYPE_EAPOL) {
691                         esp_info("Rx PACKET_TYPE_EAPOL!!!!\n");
692                         esp_port_open(priv);
693
694                         eap_skb = alloc_skb(skb->len + ETH_HLEN, GFP_KERNEL);
695                         if (!eap_skb) {
696                                 esp_info("%u memory alloc failed\n", __LINE__);
697                                 dev_kfree_skb_any(skb);
698                                 return;
699                         }
700                         eap_skb->dev = priv->ndev;
701
702                         if (!IS_ALIGNED((unsigned long) eap_skb->data, SKB_DATA_ADDR_ALIGNMENT)) {
703                                 esp_info("%u eap skb unaligned\n", __LINE__);
704                         }
705
706                         eth = (struct ethhdr *) skb_put(eap_skb, ETH_HLEN);
707                         ether_addr_copy(eth->h_dest, /*skb->data*/priv->ndev->dev_addr);
708                         ether_addr_copy(eth->h_source, /*skb->data+6*/ ap_bssid);
709                         eth->h_proto = cpu_to_be16(ETH_P_PAE);
710
711                         skb_put_data(eap_skb, skb->data, skb->len);
712                         eap_skb->protocol = eth_type_trans(eap_skb, eap_skb->dev);
713                         dev_kfree_skb_any(skb);
714
715                         netif_rx(eap_skb);
716
717                 } else if (payload_header->packet_type == PACKET_TYPE_DATA) {
718
719                         skb->dev = priv->ndev;
720                         skb->protocol = eth_type_trans(skb, priv->ndev);
721                         skb->ip_summed = CHECKSUM_NONE;
722
723                         priv->stats.rx_bytes += skb->len;
724                         /* Forward skb to kernel */
725                         NETIF_RX_NI(skb);
726                         priv->stats.rx_packets++;
727                 } else if (payload_header->packet_type == PACKET_TYPE_COMMAND_RESPONSE) {
728                         process_cmd_resp(priv->adapter, skb);
729                 } else if (payload_header->packet_type == PACKET_TYPE_EVENT) {
730                         process_cmd_event(priv, skb);
731                         dev_kfree_skb_any(skb);
732                 }
733
734         } else if (payload_header->if_type == ESP_HCI_IF) {
735                 if (hdev) {
736
737                         type = skb->data;
738                         hci_skb_pkt_type(skb) = *type;
739                         skb_pull(skb, 1);
740
741 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0))
742                         if (hci_recv_frame(hdev, skb)) {
743 #else
744                         if (hci_recv_frame(skb)) {
745 #endif
746                                 hdev->stat.err_rx++;
747                         } else {
748                                 esp_hci_update_rx_counter(hdev, *type, skb->len);
749                         }
750                 }
751         } else if (payload_header->if_type == ESP_INTERNAL_IF) {
752
753                 /* Queue event skb for processing in events workqueue */
754                 skb_queue_tail(&adapter->events_skb_q, skb);
755
756                 if (adapter->events_wq)
757                         queue_work(adapter->events_wq, &adapter->events_work);
758                 else
759                         dev_kfree_skb_any(skb);
760
761         } else if (payload_header->if_type == ESP_TEST_IF) {
762 #if TEST_RAW_TP
763                 if (raw_tp_mode != 0) {
764                         update_test_raw_tp_rx_stats(len);
765                 }
766 #endif
767                 dev_kfree_skb_any(skb);
768         } else {
769                 dev_kfree_skb_any(skb);
770         }
771 }
772
773 int esp_is_tx_queue_paused(struct esp_wifi_device *priv)
774 {
775         if (!priv || !priv->ndev)
776                 return 0;
777
778         if ((priv->ndev &&
779                     !netif_queue_stopped((const struct net_device *)priv->ndev)))
780                 return 1;
781     return 0;
782 }
783
784 void esp_tx_pause(struct esp_wifi_device *priv)
785 {
786         if (!priv || !priv->ndev)
787                 return;
788
789         if (!netif_queue_stopped((const struct net_device *)priv->ndev)) {
790                 netif_stop_queue(priv->ndev);
791         }
792 }
793
794 void esp_tx_resume(struct esp_wifi_device *priv)
795 {
796         if (!priv || !priv->ndev)
797                 return;
798
799         if (netif_queue_stopped((const struct net_device *)priv->ndev)) {
800                 netif_wake_queue(priv->ndev);
801         }
802 }
803
804 struct sk_buff *esp_alloc_skb(u32 len)
805 {
806         struct sk_buff *skb = NULL;
807
808         u8 offset;
809
810         skb = netdev_alloc_skb(NULL, len + INTERFACE_HEADER_PADDING);
811
812         if (skb) {
813                 /* Align SKB data pointer */
814                 offset = ((unsigned long)skb->data) & (SKB_DATA_ADDR_ALIGNMENT - 1);
815
816                 if (offset)
817                         skb_reserve(skb, INTERFACE_HEADER_PADDING - offset);
818         }
819
820         return skb;
821 }
822
823
824 static int esp_get_packets(struct esp_adapter *adapter)
825 {
826         struct sk_buff *skb = NULL;
827
828         if (!adapter || !adapter->if_ops || !adapter->if_ops->read)
829                 return -EINVAL;
830
831         skb = adapter->if_ops->read(adapter);
832
833         if (!skb)
834                 return -EFAULT;
835
836         process_rx_packet(adapter, skb);
837
838         return 0;
839 }
840
841 int esp_send_packet(struct esp_adapter *adapter, struct sk_buff *skb)
842 {
843         if (!adapter || !adapter->if_ops || !adapter->if_ops->write) {
844                 esp_err("%u adapter: %p\n", __LINE__, adapter);
845                 return -EINVAL;
846         }
847
848         return adapter->if_ops->write(adapter, skb);
849 }
850
851 static void esp_if_rx_work(struct work_struct *work)
852 {
853         /* read inbound packet and forward it to network/serial interface */
854         esp_get_packets(&adapter);
855 }
856
857 static void update_mac_filter(struct work_struct *work)
858 {
859         struct esp_adapter *adapter = esp_get_adapter();
860         struct esp_wifi_device *priv = adapter->priv[0];
861         struct net_device *ndev;
862         struct netdev_hw_addr *mac_addr;
863         u32 count = 0;
864
865         if (!priv)
866                 return;
867
868         ndev = priv->ndev;
869         if (!ndev)
870                 return;
871
872         if (!priv->port_open) {
873                 esp_verbose("Port is not open yet, skipping mac filter update\n");
874                 return;
875         }
876
877 #if CONFIG_ALLOW_MULTICAST_WAKEUP
878         netdev_for_each_mc_addr(mac_addr, ndev) {
879                 if (count < MAX_MULTICAST_ADDR_COUNT) {
880                         esp_verbose("%d: "MACSTR"\n", count+1, MAC2STR(mac_addr->addr));
881                         memcpy(&mcast_list.mcast_addr[count++], mac_addr->addr, ETH_ALEN);
882                 }
883         }
884
885         mcast_list.priv = priv;
886         mcast_list.addr_count = count;
887
888         esp_verbose("Setting Multicast list\n");
889         cmd_set_mcast_mac_list(mcast_list.priv, &mcast_list);
890 #else
891   esp_info("Not setting FW multicast addresses\n");
892 #endif
893 }
894
895 static void esp_events_work(struct work_struct *work)
896 {
897         struct sk_buff *skb = NULL;
898
899         skb = skb_dequeue(&adapter.events_skb_q);
900         if (!skb)
901                 return;
902
903         process_internal_event(&adapter, skb);
904         dev_kfree_skb_any(skb);
905 }
906
907 static struct esp_adapter *init_adapter(void)
908 {
909         memset(&adapter, 0, sizeof(adapter));
910
911         /* Prepare interface RX work */
912         adapter.if_rx_workqueue = alloc_workqueue("ESP_IF_RX_WORK_QUEUE", 0, 0);
913
914         if (!adapter.if_rx_workqueue) {
915                 deinit_adapter();
916                 return NULL;
917         }
918
919         INIT_WORK(&adapter.if_rx_work, esp_if_rx_work);
920
921         skb_queue_head_init(&adapter.events_skb_q);
922
923         adapter.events_wq = alloc_workqueue("ESP_EVENTS_WORKQUEUE", WQ_HIGHPRI, 0);
924
925         if (!adapter.events_wq) {
926                 deinit_adapter();
927                 return NULL;
928         }
929
930         INIT_WORK(&adapter.events_work, esp_events_work);
931
932         INIT_WORK(&adapter.mac_flter_work, update_mac_filter);
933
934         return &adapter;
935 }
936
937 static void deinit_adapter(void)
938 {
939         skb_queue_purge(&adapter.events_skb_q);
940
941         if (adapter.events_wq)
942                 destroy_workqueue(adapter.events_wq);
943
944         if (adapter.if_rx_workqueue)
945                 destroy_workqueue(adapter.if_rx_workqueue);
946 }
947
948 static void esp_reset(void)
949 {
950         if (resetpin != HOST_GPIO_PIN_INVALID) {
951                 /* Check valid GPIO or not */
952                 if (!gpio_is_valid(resetpin)) {
953                         esp_warn("host resetpin (%d) configured is invalid GPIO\n", resetpin);
954                         resetpin = HOST_GPIO_PIN_INVALID;
955                 } else {
956                         gpio_request(resetpin, "sysfs");
957
958                         /* HOST's resetpin set to OUTPUT, HIGH */
959                         gpio_direction_output(resetpin, true);
960
961                         /* HOST's resetpin set to LOW */
962                         gpio_set_value(resetpin, 0);
963                         udelay(200);
964
965                         /* HOST's resetpin set to INPUT */
966                         gpio_direction_input(resetpin);
967
968                         esp_dbg("Triggering ESP reset.\n");
969                 }
970         }
971 }
972
973
974 static int __init esp_init(void)
975 {
976         int ret = 0;
977         struct esp_adapter *adapter = NULL;
978
979         /* Reset ESP, Clean start ESP */
980         esp_reset();
981         msleep(200);
982
983         adapter = init_adapter();
984
985         if (!adapter)
986                 return -EFAULT;
987
988         /* Init transport layer */
989         ret = esp_init_interface_layer(adapter, clockspeed);
990
991         if (ret != 0) {
992                 deinit_adapter();
993         }
994
995         return ret;
996 }
997
998 static void __exit esp_exit(void)
999 {
1000         uint8_t iface_idx = 0;
1001 #if TEST_RAW_TP
1002         if (raw_tp_mode != 0) {
1003                 test_raw_tp_cleanup();
1004         }
1005 #endif
1006         for (iface_idx = 0; iface_idx < ESP_MAX_INTERFACE; iface_idx++) {
1007                 cmd_deinit_interface(adapter.priv[iface_idx]);
1008         }
1009         clear_bit(ESP_DRIVER_ACTIVE, &adapter.state_flags);
1010
1011         esp_deinit_interface_layer();
1012         deinit_adapter();
1013
1014         if (resetpin != HOST_GPIO_PIN_INVALID) {
1015                 gpio_free(resetpin);
1016         }
1017 }
1018 MODULE_LICENSE("GPL");
1019 MODULE_AUTHOR("Amey Inamdar <[email protected]>");
1020 MODULE_AUTHOR("Mangesh Malusare <[email protected]>");
1021 MODULE_AUTHOR("Yogesh Mantri <[email protected]>");
1022 MODULE_DESCRIPTION("Wifi driver for ESP-Hosted solution");
1023 MODULE_VERSION(RELEASE_VERSION);
1024 module_init(esp_init);
1025 module_exit(esp_exit);
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