1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (c) 2012 - 2018 Microchip Technology Inc., and its subsidiaries.
4  * All rights reserved.
5  */
6 
7 #include <linux/irq.h>
8 #include <linux/kthread.h>
9 #include <linux/firmware.h>
10 #include <linux/netdevice.h>
11 #include <linux/inetdevice.h>
12 
13 #include "cfg80211.h"
14 #include "wlan_cfg.h"
15 
16 #define WILC_MULTICAST_TABLE_SIZE	8
17 #define WILC_MAX_FW_VERSION_STR_SIZE	50
18 
19 /* latest API version supported */
20 #define WILC1000_API_VER		1
21 
22 #define WILC1000_FW_PREFIX		"atmel/wilc1000_wifi_firmware-"
23 #define __WILC1000_FW(api)		WILC1000_FW_PREFIX #api ".bin"
24 #define WILC1000_FW(api)		__WILC1000_FW(api)
25 
26 static irqreturn_t isr_uh_routine(int irq, void *user_data)
27 {
28 	struct wilc *wilc = user_data;
29 
30 	if (wilc->close) {
31 		pr_err("Can't handle UH interrupt\n");
32 		return IRQ_HANDLED;
33 	}
34 	return IRQ_WAKE_THREAD;
35 }
36 
37 static irqreturn_t isr_bh_routine(int irq, void *userdata)
38 {
39 	struct wilc *wilc = userdata;
40 
41 	if (wilc->close) {
42 		pr_err("Can't handle BH interrupt\n");
43 		return IRQ_HANDLED;
44 	}
45 
46 	wilc_handle_isr(wilc);
47 
48 	return IRQ_HANDLED;
49 }
50 
51 static int init_irq(struct net_device *dev)
52 {
53 	struct wilc_vif *vif = netdev_priv(dev);
54 	struct wilc *wl = vif->wilc;
55 	int ret;
56 
57 	ret = request_threaded_irq(wl->dev_irq_num, isr_uh_routine,
58 				   isr_bh_routine,
59 				   IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
60 				   dev->name, wl);
61 	if (ret) {
62 		netdev_err(dev, "Failed to request IRQ [%d]\n", ret);
63 		return ret;
64 	}
65 	netdev_dbg(dev, "IRQ request succeeded IRQ-NUM= %d\n", wl->dev_irq_num);
66 
67 	return 0;
68 }
69 
70 static void deinit_irq(struct net_device *dev)
71 {
72 	struct wilc_vif *vif = netdev_priv(dev);
73 	struct wilc *wilc = vif->wilc;
74 
75 	/* Deinitialize IRQ */
76 	if (wilc->dev_irq_num)
77 		free_irq(wilc->dev_irq_num, wilc);
78 }
79 
80 void wilc_mac_indicate(struct wilc *wilc)
81 {
82 	s8 status;
83 
84 	wilc_wlan_cfg_get_val(wilc, WID_STATUS, &status, 1);
85 	if (wilc->mac_status == WILC_MAC_STATUS_INIT) {
86 		wilc->mac_status = status;
87 		complete(&wilc->sync_event);
88 	} else {
89 		wilc->mac_status = status;
90 	}
91 }
92 
93 static struct net_device *get_if_handler(struct wilc *wilc, u8 *mac_header)
94 {
95 	struct net_device *ndev = NULL;
96 	struct wilc_vif *vif;
97 	struct ieee80211_hdr *h = (struct ieee80211_hdr *)mac_header;
98 
99 	list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
100 		if (vif->iftype == WILC_STATION_MODE)
101 			if (ether_addr_equal_unaligned(h->addr2, vif->bssid)) {
102 				ndev = vif->ndev;
103 				goto out;
104 			}
105 		if (vif->iftype == WILC_AP_MODE)
106 			if (ether_addr_equal_unaligned(h->addr1, vif->bssid)) {
107 				ndev = vif->ndev;
108 				goto out;
109 			}
110 	}
111 out:
112 	return ndev;
113 }
114 
115 void wilc_wlan_set_bssid(struct net_device *wilc_netdev, const u8 *bssid,
116 			 u8 mode)
117 {
118 	struct wilc_vif *vif = netdev_priv(wilc_netdev);
119 
120 	if (bssid)
121 		ether_addr_copy(vif->bssid, bssid);
122 	else
123 		eth_zero_addr(vif->bssid);
124 
125 	vif->iftype = mode;
126 }
127 
128 int wilc_wlan_get_num_conn_ifcs(struct wilc *wilc)
129 {
130 	int srcu_idx;
131 	u8 ret_val = 0;
132 	struct wilc_vif *vif;
133 
134 	srcu_idx = srcu_read_lock(&wilc->srcu);
135 	list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
136 		if (!is_zero_ether_addr(vif->bssid))
137 			ret_val++;
138 	}
139 	srcu_read_unlock(&wilc->srcu, srcu_idx);
140 	return ret_val;
141 }
142 
143 static int wilc_txq_task(void *vp)
144 {
145 	int ret;
146 	u32 txq_count;
147 	struct wilc *wl = vp;
148 
149 	complete(&wl->txq_thread_started);
150 	while (1) {
151 		wait_for_completion(&wl->txq_event);
152 
153 		if (wl->close) {
154 			complete(&wl->txq_thread_started);
155 
156 			while (!kthread_should_stop())
157 				schedule();
158 			break;
159 		}
160 		do {
161 			ret = wilc_wlan_handle_txq(wl, &txq_count);
162 			if (txq_count < FLOW_CONTROL_LOWER_THRESHOLD) {
163 				int srcu_idx;
164 				struct wilc_vif *ifc;
165 
166 				srcu_idx = srcu_read_lock(&wl->srcu);
167 				list_for_each_entry_rcu(ifc, &wl->vif_list,
168 							list) {
169 					if (ifc->mac_opened && ifc->ndev)
170 						netif_wake_queue(ifc->ndev);
171 				}
172 				srcu_read_unlock(&wl->srcu, srcu_idx);
173 			}
174 		} while (ret == WILC_VMM_ENTRY_FULL_RETRY && !wl->close);
175 	}
176 	return 0;
177 }
178 
179 static int wilc_wlan_get_firmware(struct net_device *dev)
180 {
181 	struct wilc_vif *vif = netdev_priv(dev);
182 	struct wilc *wilc = vif->wilc;
183 	int chip_id;
184 	const struct firmware *wilc_fw;
185 	int ret;
186 
187 	chip_id = wilc_get_chipid(wilc, false);
188 
189 	netdev_info(dev, "ChipID [%x] loading firmware [%s]\n", chip_id,
190 		    WILC1000_FW(WILC1000_API_VER));
191 
192 	ret = request_firmware(&wilc_fw, WILC1000_FW(WILC1000_API_VER),
193 			       wilc->dev);
194 	if (ret != 0) {
195 		netdev_err(dev, "%s - firmware not available\n",
196 			   WILC1000_FW(WILC1000_API_VER));
197 		return -EINVAL;
198 	}
199 	wilc->firmware = wilc_fw;
200 
201 	return 0;
202 }
203 
204 static int wilc_start_firmware(struct net_device *dev)
205 {
206 	struct wilc_vif *vif = netdev_priv(dev);
207 	struct wilc *wilc = vif->wilc;
208 	int ret = 0;
209 
210 	ret = wilc_wlan_start(wilc);
211 	if (ret)
212 		return ret;
213 
214 	if (!wait_for_completion_timeout(&wilc->sync_event,
215 					 msecs_to_jiffies(5000)))
216 		return -ETIME;
217 
218 	return 0;
219 }
220 
221 static int wilc1000_firmware_download(struct net_device *dev)
222 {
223 	struct wilc_vif *vif = netdev_priv(dev);
224 	struct wilc *wilc = vif->wilc;
225 	int ret = 0;
226 
227 	if (!wilc->firmware) {
228 		netdev_err(dev, "Firmware buffer is NULL\n");
229 		return -ENOBUFS;
230 	}
231 
232 	ret = wilc_wlan_firmware_download(wilc, wilc->firmware->data,
233 					  wilc->firmware->size);
234 	if (ret)
235 		return ret;
236 
237 	release_firmware(wilc->firmware);
238 	wilc->firmware = NULL;
239 
240 	netdev_dbg(dev, "Download Succeeded\n");
241 
242 	return 0;
243 }
244 
245 static int wilc_init_fw_config(struct net_device *dev, struct wilc_vif *vif)
246 {
247 	struct wilc_priv *priv = &vif->priv;
248 	struct host_if_drv *hif_drv;
249 	u8 b;
250 	u16 hw;
251 	u32 w;
252 
253 	netdev_dbg(dev, "Start configuring Firmware\n");
254 	hif_drv = (struct host_if_drv *)priv->hif_drv;
255 	netdev_dbg(dev, "Host = %p\n", hif_drv);
256 
257 	w = vif->iftype;
258 	cpu_to_le32s(&w);
259 	if (!wilc_wlan_cfg_set(vif, 1, WID_SET_OPERATION_MODE, (u8 *)&w, 4,
260 			       0, 0))
261 		goto fail;
262 
263 	b = WILC_FW_BSS_TYPE_INFRA;
264 	if (!wilc_wlan_cfg_set(vif, 0, WID_BSS_TYPE, &b, 1, 0, 0))
265 		goto fail;
266 
267 	b = WILC_FW_TX_RATE_AUTO;
268 	if (!wilc_wlan_cfg_set(vif, 0, WID_CURRENT_TX_RATE, &b, 1, 0, 0))
269 		goto fail;
270 
271 	b = WILC_FW_OPER_MODE_G_MIXED_11B_2;
272 	if (!wilc_wlan_cfg_set(vif, 0, WID_11G_OPERATING_MODE, &b, 1, 0, 0))
273 		goto fail;
274 
275 	b = WILC_FW_PREAMBLE_SHORT;
276 	if (!wilc_wlan_cfg_set(vif, 0, WID_PREAMBLE, &b, 1, 0, 0))
277 		goto fail;
278 
279 	b = WILC_FW_11N_PROT_AUTO;
280 	if (!wilc_wlan_cfg_set(vif, 0, WID_11N_PROT_MECH, &b, 1, 0, 0))
281 		goto fail;
282 
283 	b = WILC_FW_ACTIVE_SCAN;
284 	if (!wilc_wlan_cfg_set(vif, 0, WID_SCAN_TYPE, &b, 1, 0, 0))
285 		goto fail;
286 
287 	b = WILC_FW_SITE_SURVEY_OFF;
288 	if (!wilc_wlan_cfg_set(vif, 0, WID_SITE_SURVEY, &b, 1, 0, 0))
289 		goto fail;
290 
291 	hw = 0xffff;
292 	cpu_to_le16s(&hw);
293 	if (!wilc_wlan_cfg_set(vif, 0, WID_RTS_THRESHOLD, (u8 *)&hw, 2, 0, 0))
294 		goto fail;
295 
296 	hw = 2346;
297 	cpu_to_le16s(&hw);
298 	if (!wilc_wlan_cfg_set(vif, 0, WID_FRAG_THRESHOLD, (u8 *)&hw, 2, 0, 0))
299 		goto fail;
300 
301 	b = 0;
302 	if (!wilc_wlan_cfg_set(vif, 0, WID_BCAST_SSID, &b, 1, 0, 0))
303 		goto fail;
304 
305 	b = 1;
306 	if (!wilc_wlan_cfg_set(vif, 0, WID_QOS_ENABLE, &b, 1, 0, 0))
307 		goto fail;
308 
309 	b = WILC_FW_NO_POWERSAVE;
310 	if (!wilc_wlan_cfg_set(vif, 0, WID_POWER_MANAGEMENT, &b, 1, 0, 0))
311 		goto fail;
312 
313 	b = WILC_FW_SEC_NO;
314 	if (!wilc_wlan_cfg_set(vif, 0, WID_11I_MODE, &b, 1, 0, 0))
315 		goto fail;
316 
317 	b = WILC_FW_AUTH_OPEN_SYSTEM;
318 	if (!wilc_wlan_cfg_set(vif, 0, WID_AUTH_TYPE, &b, 1, 0, 0))
319 		goto fail;
320 
321 	b = 3;
322 	if (!wilc_wlan_cfg_set(vif, 0, WID_LISTEN_INTERVAL, &b, 1, 0, 0))
323 		goto fail;
324 
325 	b = 3;
326 	if (!wilc_wlan_cfg_set(vif, 0, WID_DTIM_PERIOD, &b, 1, 0, 0))
327 		goto fail;
328 
329 	b = WILC_FW_ACK_POLICY_NORMAL;
330 	if (!wilc_wlan_cfg_set(vif, 0, WID_ACK_POLICY, &b, 1, 0, 0))
331 		goto fail;
332 
333 	b = 0;
334 	if (!wilc_wlan_cfg_set(vif, 0, WID_USER_CONTROL_ON_TX_POWER, &b, 1,
335 			       0, 0))
336 		goto fail;
337 
338 	b = 48;
339 	if (!wilc_wlan_cfg_set(vif, 0, WID_TX_POWER_LEVEL_11A, &b, 1, 0, 0))
340 		goto fail;
341 
342 	b = 28;
343 	if (!wilc_wlan_cfg_set(vif, 0, WID_TX_POWER_LEVEL_11B, &b, 1, 0, 0))
344 		goto fail;
345 
346 	hw = 100;
347 	cpu_to_le16s(&hw);
348 	if (!wilc_wlan_cfg_set(vif, 0, WID_BEACON_INTERVAL, (u8 *)&hw, 2, 0, 0))
349 		goto fail;
350 
351 	b = WILC_FW_REKEY_POLICY_DISABLE;
352 	if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_POLICY, &b, 1, 0, 0))
353 		goto fail;
354 
355 	w = 84600;
356 	cpu_to_le32s(&w);
357 	if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_PERIOD, (u8 *)&w, 4, 0, 0))
358 		goto fail;
359 
360 	w = 500;
361 	cpu_to_le32s(&w);
362 	if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_PACKET_COUNT, (u8 *)&w, 4, 0,
363 			       0))
364 		goto fail;
365 
366 	b = 1;
367 	if (!wilc_wlan_cfg_set(vif, 0, WID_SHORT_SLOT_ALLOWED, &b, 1, 0,
368 			       0))
369 		goto fail;
370 
371 	b = WILC_FW_ERP_PROT_SELF_CTS;
372 	if (!wilc_wlan_cfg_set(vif, 0, WID_11N_ERP_PROT_TYPE, &b, 1, 0, 0))
373 		goto fail;
374 
375 	b = 1;
376 	if (!wilc_wlan_cfg_set(vif, 0, WID_11N_ENABLE, &b, 1, 0, 0))
377 		goto fail;
378 
379 	b = WILC_FW_11N_OP_MODE_HT_MIXED;
380 	if (!wilc_wlan_cfg_set(vif, 0, WID_11N_OPERATING_MODE, &b, 1, 0, 0))
381 		goto fail;
382 
383 	b = 1;
384 	if (!wilc_wlan_cfg_set(vif, 0, WID_11N_TXOP_PROT_DISABLE, &b, 1, 0, 0))
385 		goto fail;
386 
387 	b = WILC_FW_OBBS_NONHT_DETECT_PROTECT_REPORT;
388 	if (!wilc_wlan_cfg_set(vif, 0, WID_11N_OBSS_NONHT_DETECTION, &b, 1,
389 			       0, 0))
390 		goto fail;
391 
392 	b = WILC_FW_HT_PROT_RTS_CTS_NONHT;
393 	if (!wilc_wlan_cfg_set(vif, 0, WID_11N_HT_PROT_TYPE, &b, 1, 0, 0))
394 		goto fail;
395 
396 	b = 0;
397 	if (!wilc_wlan_cfg_set(vif, 0, WID_11N_RIFS_PROT_ENABLE, &b, 1, 0,
398 			       0))
399 		goto fail;
400 
401 	b = 7;
402 	if (!wilc_wlan_cfg_set(vif, 0, WID_11N_CURRENT_TX_MCS, &b, 1, 0, 0))
403 		goto fail;
404 
405 	b = 1;
406 	if (!wilc_wlan_cfg_set(vif, 0, WID_11N_IMMEDIATE_BA_ENABLED, &b, 1,
407 			       1, 1))
408 		goto fail;
409 
410 	return 0;
411 
412 fail:
413 	return -EINVAL;
414 }
415 
416 static void wlan_deinitialize_threads(struct net_device *dev)
417 {
418 	struct wilc_vif *vif = netdev_priv(dev);
419 	struct wilc *wl = vif->wilc;
420 
421 	wl->close = 1;
422 
423 	complete(&wl->txq_event);
424 
425 	if (wl->txq_thread) {
426 		kthread_stop(wl->txq_thread);
427 		wl->txq_thread = NULL;
428 	}
429 }
430 
431 static void wilc_wlan_deinitialize(struct net_device *dev)
432 {
433 	struct wilc_vif *vif = netdev_priv(dev);
434 	struct wilc *wl = vif->wilc;
435 
436 	if (!wl) {
437 		netdev_err(dev, "wl is NULL\n");
438 		return;
439 	}
440 
441 	if (wl->initialized) {
442 		netdev_info(dev, "Deinitializing wilc1000...\n");
443 
444 		if (!wl->dev_irq_num &&
445 		    wl->hif_func->disable_interrupt) {
446 			mutex_lock(&wl->hif_cs);
447 			wl->hif_func->disable_interrupt(wl);
448 			mutex_unlock(&wl->hif_cs);
449 		}
450 		complete(&wl->txq_event);
451 
452 		wlan_deinitialize_threads(dev);
453 		deinit_irq(dev);
454 
455 		wilc_wlan_stop(wl, vif);
456 		wilc_wlan_cleanup(dev);
457 
458 		wl->initialized = false;
459 
460 		netdev_dbg(dev, "wilc1000 deinitialization Done\n");
461 	} else {
462 		netdev_dbg(dev, "wilc1000 is not initialized\n");
463 	}
464 }
465 
466 static int wlan_initialize_threads(struct net_device *dev)
467 {
468 	struct wilc_vif *vif = netdev_priv(dev);
469 	struct wilc *wilc = vif->wilc;
470 
471 	wilc->txq_thread = kthread_run(wilc_txq_task, (void *)wilc,
472 				       "%s-tx", dev->name);
473 	if (IS_ERR(wilc->txq_thread)) {
474 		netdev_err(dev, "couldn't create TXQ thread\n");
475 		wilc->close = 1;
476 		return PTR_ERR(wilc->txq_thread);
477 	}
478 	wait_for_completion(&wilc->txq_thread_started);
479 
480 	return 0;
481 }
482 
483 static int wilc_wlan_initialize(struct net_device *dev, struct wilc_vif *vif)
484 {
485 	int ret = 0;
486 	struct wilc *wl = vif->wilc;
487 
488 	if (!wl->initialized) {
489 		wl->mac_status = WILC_MAC_STATUS_INIT;
490 		wl->close = 0;
491 
492 		ret = wilc_wlan_init(dev);
493 		if (ret)
494 			return ret;
495 
496 		ret = wlan_initialize_threads(dev);
497 		if (ret)
498 			goto fail_wilc_wlan;
499 
500 		if (wl->dev_irq_num && init_irq(dev)) {
501 			ret = -EIO;
502 			goto fail_threads;
503 		}
504 
505 		if (!wl->dev_irq_num &&
506 		    wl->hif_func->enable_interrupt &&
507 		    wl->hif_func->enable_interrupt(wl)) {
508 			ret = -EIO;
509 			goto fail_irq_init;
510 		}
511 
512 		ret = wilc_wlan_get_firmware(dev);
513 		if (ret)
514 			goto fail_irq_enable;
515 
516 		ret = wilc1000_firmware_download(dev);
517 		if (ret)
518 			goto fail_irq_enable;
519 
520 		ret = wilc_start_firmware(dev);
521 		if (ret)
522 			goto fail_irq_enable;
523 
524 		if (wilc_wlan_cfg_get(vif, 1, WID_FIRMWARE_VERSION, 1, 0)) {
525 			int size;
526 			char firmware_ver[WILC_MAX_FW_VERSION_STR_SIZE];
527 
528 			size = wilc_wlan_cfg_get_val(wl, WID_FIRMWARE_VERSION,
529 						     firmware_ver,
530 						     sizeof(firmware_ver));
531 			firmware_ver[size] = '\0';
532 			netdev_dbg(dev, "Firmware Ver = %s\n", firmware_ver);
533 		}
534 
535 		ret = wilc_init_fw_config(dev, vif);
536 		if (ret) {
537 			netdev_err(dev, "Failed to configure firmware\n");
538 			goto fail_fw_start;
539 		}
540 		wl->initialized = true;
541 		return 0;
542 
543 fail_fw_start:
544 		wilc_wlan_stop(wl, vif);
545 
546 fail_irq_enable:
547 		if (!wl->dev_irq_num &&
548 		    wl->hif_func->disable_interrupt)
549 			wl->hif_func->disable_interrupt(wl);
550 fail_irq_init:
551 		if (wl->dev_irq_num)
552 			deinit_irq(dev);
553 fail_threads:
554 		wlan_deinitialize_threads(dev);
555 fail_wilc_wlan:
556 		wilc_wlan_cleanup(dev);
557 		netdev_err(dev, "WLAN initialization FAILED\n");
558 	} else {
559 		netdev_dbg(dev, "wilc1000 already initialized\n");
560 	}
561 	return ret;
562 }
563 
564 static int mac_init_fn(struct net_device *ndev)
565 {
566 	netif_start_queue(ndev);
567 	netif_stop_queue(ndev);
568 
569 	return 0;
570 }
571 
572 static int wilc_mac_open(struct net_device *ndev)
573 {
574 	struct wilc_vif *vif = netdev_priv(ndev);
575 	struct wilc *wl = vif->wilc;
576 	int ret = 0;
577 	struct mgmt_frame_regs mgmt_regs = {};
578 	u8 addr[ETH_ALEN] __aligned(2);
579 
580 	if (!wl || !wl->dev) {
581 		netdev_err(ndev, "device not ready\n");
582 		return -ENODEV;
583 	}
584 
585 	netdev_dbg(ndev, "MAC OPEN[%p]\n", ndev);
586 
587 	ret = wilc_init_host_int(ndev);
588 	if (ret)
589 		return ret;
590 
591 	ret = wilc_wlan_initialize(ndev, vif);
592 	if (ret) {
593 		wilc_deinit_host_int(ndev);
594 		return ret;
595 	}
596 
597 	wilc_set_operation_mode(vif, wilc_get_vif_idx(vif), vif->iftype,
598 				vif->idx);
599 
600 	if (is_valid_ether_addr(ndev->dev_addr)) {
601 		ether_addr_copy(addr, ndev->dev_addr);
602 		wilc_set_mac_address(vif, addr);
603 	} else {
604 		wilc_get_mac_address(vif, addr);
605 		eth_hw_addr_set(ndev, addr);
606 	}
607 	netdev_dbg(ndev, "Mac address: %pM\n", ndev->dev_addr);
608 
609 	if (!is_valid_ether_addr(ndev->dev_addr)) {
610 		netdev_err(ndev, "Wrong MAC address\n");
611 		wilc_deinit_host_int(ndev);
612 		wilc_wlan_deinitialize(ndev);
613 		return -EINVAL;
614 	}
615 
616 	mgmt_regs.interface_stypes = vif->mgmt_reg_stypes;
617 	/* so we detect a change */
618 	vif->mgmt_reg_stypes = 0;
619 	wilc_update_mgmt_frame_registrations(vif->ndev->ieee80211_ptr->wiphy,
620 					     vif->ndev->ieee80211_ptr,
621 					     &mgmt_regs);
622 	netif_wake_queue(ndev);
623 	wl->open_ifcs++;
624 	vif->mac_opened = 1;
625 	return 0;
626 }
627 
628 static struct net_device_stats *mac_stats(struct net_device *dev)
629 {
630 	struct wilc_vif *vif = netdev_priv(dev);
631 
632 	return &vif->netstats;
633 }
634 
635 static int wilc_set_mac_addr(struct net_device *dev, void *p)
636 {
637 	int result;
638 	struct wilc_vif *vif = netdev_priv(dev);
639 	struct wilc *wilc = vif->wilc;
640 	struct sockaddr *addr = (struct sockaddr *)p;
641 	unsigned char mac_addr[ETH_ALEN];
642 	struct wilc_vif *tmp_vif;
643 	int srcu_idx;
644 
645 	if (!is_valid_ether_addr(addr->sa_data))
646 		return -EADDRNOTAVAIL;
647 
648 	if (!vif->mac_opened) {
649 		eth_commit_mac_addr_change(dev, p);
650 		return 0;
651 	}
652 
653 	/* Verify MAC Address is not already in use: */
654 
655 	srcu_idx = srcu_read_lock(&wilc->srcu);
656 	list_for_each_entry_rcu(tmp_vif, &wilc->vif_list, list) {
657 		wilc_get_mac_address(tmp_vif, mac_addr);
658 		if (ether_addr_equal(addr->sa_data, mac_addr)) {
659 			if (vif != tmp_vif) {
660 				srcu_read_unlock(&wilc->srcu, srcu_idx);
661 				return -EADDRNOTAVAIL;
662 			}
663 			srcu_read_unlock(&wilc->srcu, srcu_idx);
664 			return 0;
665 		}
666 	}
667 	srcu_read_unlock(&wilc->srcu, srcu_idx);
668 
669 	result = wilc_set_mac_address(vif, (u8 *)addr->sa_data);
670 	if (result)
671 		return result;
672 
673 	eth_commit_mac_addr_change(dev, p);
674 	return result;
675 }
676 
677 static void wilc_set_multicast_list(struct net_device *dev)
678 {
679 	struct netdev_hw_addr *ha;
680 	struct wilc_vif *vif = netdev_priv(dev);
681 	int i;
682 	u8 *mc_list;
683 	u8 *cur_mc;
684 
685 	if (dev->flags & IFF_PROMISC)
686 		return;
687 
688 	if (dev->flags & IFF_ALLMULTI ||
689 	    dev->mc.count > WILC_MULTICAST_TABLE_SIZE) {
690 		wilc_setup_multicast_filter(vif, 0, 0, NULL);
691 		return;
692 	}
693 
694 	if (dev->mc.count == 0) {
695 		wilc_setup_multicast_filter(vif, 1, 0, NULL);
696 		return;
697 	}
698 
699 	mc_list = kmalloc_array(dev->mc.count, ETH_ALEN, GFP_ATOMIC);
700 	if (!mc_list)
701 		return;
702 
703 	cur_mc = mc_list;
704 	i = 0;
705 	netdev_for_each_mc_addr(ha, dev) {
706 		memcpy(cur_mc, ha->addr, ETH_ALEN);
707 		netdev_dbg(dev, "Entry[%d]: %pM\n", i, cur_mc);
708 		i++;
709 		cur_mc += ETH_ALEN;
710 	}
711 
712 	if (wilc_setup_multicast_filter(vif, 1, dev->mc.count, mc_list))
713 		kfree(mc_list);
714 }
715 
716 static void wilc_tx_complete(void *priv, int status)
717 {
718 	struct tx_complete_data *pv_data = priv;
719 
720 	dev_kfree_skb(pv_data->skb);
721 	kfree(pv_data);
722 }
723 
724 netdev_tx_t wilc_mac_xmit(struct sk_buff *skb, struct net_device *ndev)
725 {
726 	struct wilc_vif *vif = netdev_priv(ndev);
727 	struct wilc *wilc = vif->wilc;
728 	struct tx_complete_data *tx_data = NULL;
729 	int queue_count;
730 
731 	if (skb->dev != ndev) {
732 		netdev_err(ndev, "Packet not destined to this device\n");
733 		return NETDEV_TX_OK;
734 	}
735 
736 	tx_data = kmalloc(sizeof(*tx_data), GFP_ATOMIC);
737 	if (!tx_data) {
738 		dev_kfree_skb(skb);
739 		netif_wake_queue(ndev);
740 		return NETDEV_TX_OK;
741 	}
742 
743 	tx_data->buff = skb->data;
744 	tx_data->size = skb->len;
745 	tx_data->skb  = skb;
746 
747 	vif->netstats.tx_packets++;
748 	vif->netstats.tx_bytes += tx_data->size;
749 	queue_count = wilc_wlan_txq_add_net_pkt(ndev, tx_data,
750 						tx_data->buff, tx_data->size,
751 						wilc_tx_complete);
752 
753 	if (queue_count > FLOW_CONTROL_UPPER_THRESHOLD) {
754 		int srcu_idx;
755 		struct wilc_vif *vif;
756 
757 		srcu_idx = srcu_read_lock(&wilc->srcu);
758 		list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
759 			if (vif->mac_opened)
760 				netif_stop_queue(vif->ndev);
761 		}
762 		srcu_read_unlock(&wilc->srcu, srcu_idx);
763 	}
764 
765 	return NETDEV_TX_OK;
766 }
767 
768 static int wilc_mac_close(struct net_device *ndev)
769 {
770 	struct wilc_vif *vif = netdev_priv(ndev);
771 	struct wilc *wl = vif->wilc;
772 
773 	netdev_dbg(ndev, "Mac close\n");
774 
775 	if (wl->open_ifcs > 0)
776 		wl->open_ifcs--;
777 	else
778 		return 0;
779 
780 	if (vif->ndev) {
781 		netif_stop_queue(vif->ndev);
782 
783 		wilc_handle_disconnect(vif);
784 		wilc_deinit_host_int(vif->ndev);
785 	}
786 
787 	if (wl->open_ifcs == 0) {
788 		netdev_dbg(ndev, "Deinitializing wilc1000\n");
789 		wl->close = 1;
790 		wilc_wlan_deinitialize(ndev);
791 	}
792 
793 	vif->mac_opened = 0;
794 
795 	return 0;
796 }
797 
798 void wilc_frmw_to_host(struct wilc *wilc, u8 *buff, u32 size,
799 		       u32 pkt_offset)
800 {
801 	unsigned int frame_len = 0;
802 	int stats;
803 	unsigned char *buff_to_send = NULL;
804 	struct sk_buff *skb;
805 	struct net_device *wilc_netdev;
806 	struct wilc_vif *vif;
807 
808 	if (!wilc)
809 		return;
810 
811 	wilc_netdev = get_if_handler(wilc, buff);
812 	if (!wilc_netdev)
813 		return;
814 
815 	buff += pkt_offset;
816 	vif = netdev_priv(wilc_netdev);
817 
818 	if (size > 0) {
819 		frame_len = size;
820 		buff_to_send = buff;
821 
822 		skb = dev_alloc_skb(frame_len);
823 		if (!skb)
824 			return;
825 
826 		skb->dev = wilc_netdev;
827 
828 		skb_put_data(skb, buff_to_send, frame_len);
829 
830 		skb->protocol = eth_type_trans(skb, wilc_netdev);
831 		vif->netstats.rx_packets++;
832 		vif->netstats.rx_bytes += frame_len;
833 		skb->ip_summed = CHECKSUM_UNNECESSARY;
834 		stats = netif_rx(skb);
835 		netdev_dbg(wilc_netdev, "netif_rx ret value is: %d\n", stats);
836 	}
837 }
838 
839 void wilc_wfi_mgmt_rx(struct wilc *wilc, u8 *buff, u32 size, bool is_auth)
840 {
841 	int srcu_idx;
842 	struct wilc_vif *vif;
843 
844 	srcu_idx = srcu_read_lock(&wilc->srcu);
845 	list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
846 		struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buff;
847 		u16 type = le16_to_cpup((__le16 *)buff);
848 		u32 type_bit = BIT(type >> 4);
849 		u32 auth_bit = BIT(IEEE80211_STYPE_AUTH >> 4);
850 
851 		if ((vif->mgmt_reg_stypes & auth_bit &&
852 		     ieee80211_is_auth(mgmt->frame_control)) &&
853 		    vif->iftype == WILC_STATION_MODE && is_auth) {
854 			wilc_wfi_mgmt_frame_rx(vif, buff, size);
855 			break;
856 		}
857 
858 		if (vif->priv.p2p_listen_state &&
859 		    vif->mgmt_reg_stypes & type_bit)
860 			wilc_wfi_p2p_rx(vif, buff, size);
861 
862 		if (vif->monitor_flag)
863 			wilc_wfi_monitor_rx(wilc->monitor_dev, buff, size);
864 	}
865 	srcu_read_unlock(&wilc->srcu, srcu_idx);
866 }
867 
868 static const struct net_device_ops wilc_netdev_ops = {
869 	.ndo_init = mac_init_fn,
870 	.ndo_open = wilc_mac_open,
871 	.ndo_stop = wilc_mac_close,
872 	.ndo_set_mac_address = wilc_set_mac_addr,
873 	.ndo_start_xmit = wilc_mac_xmit,
874 	.ndo_get_stats = mac_stats,
875 	.ndo_set_rx_mode  = wilc_set_multicast_list,
876 };
877 
878 void wilc_netdev_cleanup(struct wilc *wilc)
879 {
880 	struct wilc_vif *vif;
881 	int srcu_idx, ifc_cnt = 0;
882 
883 	if (!wilc)
884 		return;
885 
886 	if (wilc->firmware) {
887 		release_firmware(wilc->firmware);
888 		wilc->firmware = NULL;
889 	}
890 
891 	srcu_idx = srcu_read_lock(&wilc->srcu);
892 	list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
893 		if (vif->ndev)
894 			unregister_netdev(vif->ndev);
895 	}
896 	srcu_read_unlock(&wilc->srcu, srcu_idx);
897 
898 	wilc_wfi_deinit_mon_interface(wilc, false);
899 	destroy_workqueue(wilc->hif_workqueue);
900 
901 	while (ifc_cnt < WILC_NUM_CONCURRENT_IFC) {
902 		mutex_lock(&wilc->vif_mutex);
903 		if (wilc->vif_num <= 0) {
904 			mutex_unlock(&wilc->vif_mutex);
905 			break;
906 		}
907 		vif = wilc_get_wl_to_vif(wilc);
908 		if (!IS_ERR(vif))
909 			list_del_rcu(&vif->list);
910 
911 		wilc->vif_num--;
912 		mutex_unlock(&wilc->vif_mutex);
913 		synchronize_srcu(&wilc->srcu);
914 		ifc_cnt++;
915 	}
916 
917 	wilc_wlan_cfg_deinit(wilc);
918 	wlan_deinit_locks(wilc);
919 	wiphy_unregister(wilc->wiphy);
920 	wiphy_free(wilc->wiphy);
921 }
922 EXPORT_SYMBOL_GPL(wilc_netdev_cleanup);
923 
924 static u8 wilc_get_available_idx(struct wilc *wl)
925 {
926 	int idx = 0;
927 	struct wilc_vif *vif;
928 	int srcu_idx;
929 
930 	srcu_idx = srcu_read_lock(&wl->srcu);
931 	list_for_each_entry_rcu(vif, &wl->vif_list, list) {
932 		if (vif->idx == 0)
933 			idx = 1;
934 		else
935 			idx = 0;
936 	}
937 	srcu_read_unlock(&wl->srcu, srcu_idx);
938 	return idx;
939 }
940 
941 struct wilc_vif *wilc_netdev_ifc_init(struct wilc *wl, const char *name,
942 				      int vif_type, enum nl80211_iftype type,
943 				      bool rtnl_locked)
944 {
945 	struct net_device *ndev;
946 	struct wilc_vif *vif;
947 	int ret;
948 
949 	ndev = alloc_etherdev(sizeof(*vif));
950 	if (!ndev)
951 		return ERR_PTR(-ENOMEM);
952 
953 	vif = netdev_priv(ndev);
954 	ndev->ieee80211_ptr = &vif->priv.wdev;
955 	strcpy(ndev->name, name);
956 	vif->wilc = wl;
957 	vif->ndev = ndev;
958 	ndev->ml_priv = vif;
959 
960 	ndev->netdev_ops = &wilc_netdev_ops;
961 
962 	SET_NETDEV_DEV(ndev, wiphy_dev(wl->wiphy));
963 
964 	vif->priv.wdev.wiphy = wl->wiphy;
965 	vif->priv.wdev.netdev = ndev;
966 	vif->priv.wdev.iftype = type;
967 	vif->priv.dev = ndev;
968 
969 	if (rtnl_locked)
970 		ret = cfg80211_register_netdevice(ndev);
971 	else
972 		ret = register_netdev(ndev);
973 
974 	if (ret) {
975 		ret = -EFAULT;
976 		goto error;
977 	}
978 
979 	wl->hif_workqueue = alloc_ordered_workqueue("%s-wq", WQ_MEM_RECLAIM,
980 						    ndev->name);
981 	if (!wl->hif_workqueue) {
982 		ret = -ENOMEM;
983 		goto error;
984 	}
985 
986 	ndev->needs_free_netdev = true;
987 	vif->iftype = vif_type;
988 	vif->idx = wilc_get_available_idx(wl);
989 	vif->mac_opened = 0;
990 	mutex_lock(&wl->vif_mutex);
991 	list_add_tail_rcu(&vif->list, &wl->vif_list);
992 	wl->vif_num += 1;
993 	mutex_unlock(&wl->vif_mutex);
994 	synchronize_srcu(&wl->srcu);
995 
996 	return vif;
997 
998   error:
999 	free_netdev(ndev);
1000 	return ERR_PTR(ret);
1001 }
1002 
1003 MODULE_LICENSE("GPL");
1004 MODULE_FIRMWARE(WILC1000_FW(WILC1000_API_VER));
1005