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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
26static 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
37static 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
51static 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
70static 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
80void 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
93static 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 }
111out:
112 return ndev;
113}
114
115void 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
128int 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
143static 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 if (wait_for_completion_interruptible(&wl->txq_event))
152 continue;
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 &&
170 netif_queue_stopped(ifc->ndev))
171 netif_wake_queue(ifc->ndev);
172 }
173 srcu_read_unlock(&wl->srcu, srcu_idx);
174 }
175 if (ret != WILC_VMM_ENTRY_FULL_RETRY)
176 break;
177 /* Back off TX task from sending packets for some time.
178 * msleep_interruptible will allow RX task to run and
179 * free buffers. TX task will be in TASK_INTERRUPTIBLE
180 * state which will put the thread back to CPU running
181 * queue when it's signaled even if the timeout isn't
182 * elapsed. This gives faster chance for reserved SK
183 * buffers to be free.
184 */
185 msleep_interruptible(TX_BACKOFF_WEIGHT_MS);
186 } while (!wl->close);
187 }
188 return 0;
189}
190
191static int wilc_wlan_get_firmware(struct net_device *dev)
192{
193 struct wilc_vif *vif = netdev_priv(dev);
194 struct wilc *wilc = vif->wilc;
195 int chip_id;
196 const struct firmware *wilc_fw;
197 int ret;
198
199 chip_id = wilc_get_chipid(wilc, false);
200
201 netdev_info(dev, "ChipID [%x] loading firmware [%s]\n", chip_id,
202 WILC1000_FW(WILC1000_API_VER));
203
204 ret = request_firmware(&wilc_fw, WILC1000_FW(WILC1000_API_VER),
205 wilc->dev);
206 if (ret != 0) {
207 netdev_err(dev, "%s - firmware not available\n",
208 WILC1000_FW(WILC1000_API_VER));
209 return -EINVAL;
210 }
211 wilc->firmware = wilc_fw;
212
213 return 0;
214}
215
216static int wilc_start_firmware(struct net_device *dev)
217{
218 struct wilc_vif *vif = netdev_priv(dev);
219 struct wilc *wilc = vif->wilc;
220 int ret = 0;
221
222 ret = wilc_wlan_start(wilc);
223 if (ret)
224 return ret;
225
226 if (!wait_for_completion_timeout(&wilc->sync_event,
227 msecs_to_jiffies(5000)))
228 return -ETIME;
229
230 return 0;
231}
232
233static int wilc1000_firmware_download(struct net_device *dev)
234{
235 struct wilc_vif *vif = netdev_priv(dev);
236 struct wilc *wilc = vif->wilc;
237 int ret = 0;
238
239 if (!wilc->firmware) {
240 netdev_err(dev, "Firmware buffer is NULL\n");
241 return -ENOBUFS;
242 }
243
244 ret = wilc_wlan_firmware_download(wilc, wilc->firmware->data,
245 wilc->firmware->size);
246 if (ret)
247 return ret;
248
249 release_firmware(wilc->firmware);
250 wilc->firmware = NULL;
251
252 netdev_dbg(dev, "Download Succeeded\n");
253
254 return 0;
255}
256
257static int wilc_init_fw_config(struct net_device *dev, struct wilc_vif *vif)
258{
259 struct wilc_priv *priv = &vif->priv;
260 struct host_if_drv *hif_drv;
261 u8 b;
262 u16 hw;
263 u32 w;
264
265 netdev_dbg(dev, "Start configuring Firmware\n");
266 hif_drv = (struct host_if_drv *)priv->hif_drv;
267 netdev_dbg(dev, "Host = %p\n", hif_drv);
268
269 w = vif->iftype;
270 cpu_to_le32s(&w);
271 if (!wilc_wlan_cfg_set(vif, 1, WID_SET_OPERATION_MODE, (u8 *)&w, 4,
272 0, 0))
273 goto fail;
274
275 b = WILC_FW_BSS_TYPE_INFRA;
276 if (!wilc_wlan_cfg_set(vif, 0, WID_BSS_TYPE, &b, 1, 0, 0))
277 goto fail;
278
279 b = WILC_FW_TX_RATE_AUTO;
280 if (!wilc_wlan_cfg_set(vif, 0, WID_CURRENT_TX_RATE, &b, 1, 0, 0))
281 goto fail;
282
283 b = WILC_FW_OPER_MODE_G_MIXED_11B_2;
284 if (!wilc_wlan_cfg_set(vif, 0, WID_11G_OPERATING_MODE, &b, 1, 0, 0))
285 goto fail;
286
287 b = WILC_FW_PREAMBLE_SHORT;
288 if (!wilc_wlan_cfg_set(vif, 0, WID_PREAMBLE, &b, 1, 0, 0))
289 goto fail;
290
291 b = WILC_FW_11N_PROT_AUTO;
292 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_PROT_MECH, &b, 1, 0, 0))
293 goto fail;
294
295 b = WILC_FW_ACTIVE_SCAN;
296 if (!wilc_wlan_cfg_set(vif, 0, WID_SCAN_TYPE, &b, 1, 0, 0))
297 goto fail;
298
299 b = WILC_FW_SITE_SURVEY_OFF;
300 if (!wilc_wlan_cfg_set(vif, 0, WID_SITE_SURVEY, &b, 1, 0, 0))
301 goto fail;
302
303 hw = 0xffff;
304 cpu_to_le16s(&hw);
305 if (!wilc_wlan_cfg_set(vif, 0, WID_RTS_THRESHOLD, (u8 *)&hw, 2, 0, 0))
306 goto fail;
307
308 hw = 2346;
309 cpu_to_le16s(&hw);
310 if (!wilc_wlan_cfg_set(vif, 0, WID_FRAG_THRESHOLD, (u8 *)&hw, 2, 0, 0))
311 goto fail;
312
313 b = 0;
314 if (!wilc_wlan_cfg_set(vif, 0, WID_BCAST_SSID, &b, 1, 0, 0))
315 goto fail;
316
317 b = 1;
318 if (!wilc_wlan_cfg_set(vif, 0, WID_QOS_ENABLE, &b, 1, 0, 0))
319 goto fail;
320
321 b = WILC_FW_NO_POWERSAVE;
322 if (!wilc_wlan_cfg_set(vif, 0, WID_POWER_MANAGEMENT, &b, 1, 0, 0))
323 goto fail;
324
325 b = WILC_FW_SEC_NO;
326 if (!wilc_wlan_cfg_set(vif, 0, WID_11I_MODE, &b, 1, 0, 0))
327 goto fail;
328
329 b = WILC_FW_AUTH_OPEN_SYSTEM;
330 if (!wilc_wlan_cfg_set(vif, 0, WID_AUTH_TYPE, &b, 1, 0, 0))
331 goto fail;
332
333 b = 3;
334 if (!wilc_wlan_cfg_set(vif, 0, WID_LISTEN_INTERVAL, &b, 1, 0, 0))
335 goto fail;
336
337 b = 3;
338 if (!wilc_wlan_cfg_set(vif, 0, WID_DTIM_PERIOD, &b, 1, 0, 0))
339 goto fail;
340
341 b = WILC_FW_ACK_POLICY_NORMAL;
342 if (!wilc_wlan_cfg_set(vif, 0, WID_ACK_POLICY, &b, 1, 0, 0))
343 goto fail;
344
345 b = 0;
346 if (!wilc_wlan_cfg_set(vif, 0, WID_USER_CONTROL_ON_TX_POWER, &b, 1,
347 0, 0))
348 goto fail;
349
350 b = 48;
351 if (!wilc_wlan_cfg_set(vif, 0, WID_TX_POWER_LEVEL_11A, &b, 1, 0, 0))
352 goto fail;
353
354 b = 28;
355 if (!wilc_wlan_cfg_set(vif, 0, WID_TX_POWER_LEVEL_11B, &b, 1, 0, 0))
356 goto fail;
357
358 hw = 100;
359 cpu_to_le16s(&hw);
360 if (!wilc_wlan_cfg_set(vif, 0, WID_BEACON_INTERVAL, (u8 *)&hw, 2, 0, 0))
361 goto fail;
362
363 b = WILC_FW_REKEY_POLICY_DISABLE;
364 if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_POLICY, &b, 1, 0, 0))
365 goto fail;
366
367 w = 84600;
368 cpu_to_le32s(&w);
369 if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_PERIOD, (u8 *)&w, 4, 0, 0))
370 goto fail;
371
372 w = 500;
373 cpu_to_le32s(&w);
374 if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_PACKET_COUNT, (u8 *)&w, 4, 0,
375 0))
376 goto fail;
377
378 b = 1;
379 if (!wilc_wlan_cfg_set(vif, 0, WID_SHORT_SLOT_ALLOWED, &b, 1, 0,
380 0))
381 goto fail;
382
383 b = WILC_FW_ERP_PROT_SELF_CTS;
384 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_ERP_PROT_TYPE, &b, 1, 0, 0))
385 goto fail;
386
387 b = 1;
388 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_ENABLE, &b, 1, 0, 0))
389 goto fail;
390
391 b = WILC_FW_11N_OP_MODE_HT_MIXED;
392 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_OPERATING_MODE, &b, 1, 0, 0))
393 goto fail;
394
395 b = 1;
396 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_TXOP_PROT_DISABLE, &b, 1, 0, 0))
397 goto fail;
398
399 b = WILC_FW_OBBS_NONHT_DETECT_PROTECT_REPORT;
400 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_OBSS_NONHT_DETECTION, &b, 1,
401 0, 0))
402 goto fail;
403
404 b = WILC_FW_HT_PROT_RTS_CTS_NONHT;
405 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_HT_PROT_TYPE, &b, 1, 0, 0))
406 goto fail;
407
408 b = 0;
409 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_RIFS_PROT_ENABLE, &b, 1, 0,
410 0))
411 goto fail;
412
413 b = 7;
414 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_CURRENT_TX_MCS, &b, 1, 0, 0))
415 goto fail;
416
417 b = 1;
418 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_IMMEDIATE_BA_ENABLED, &b, 1,
419 1, 1))
420 goto fail;
421
422 return 0;
423
424fail:
425 return -EINVAL;
426}
427
428static void wlan_deinitialize_threads(struct net_device *dev)
429{
430 struct wilc_vif *vif = netdev_priv(dev);
431 struct wilc *wl = vif->wilc;
432
433 wl->close = 1;
434
435 complete(&wl->txq_event);
436
437 if (wl->txq_thread) {
438 kthread_stop(wl->txq_thread);
439 wl->txq_thread = NULL;
440 }
441}
442
443static void wilc_wlan_deinitialize(struct net_device *dev)
444{
445 struct wilc_vif *vif = netdev_priv(dev);
446 struct wilc *wl = vif->wilc;
447
448 if (!wl) {
449 netdev_err(dev, "wl is NULL\n");
450 return;
451 }
452
453 if (wl->initialized) {
454 netdev_info(dev, "Deinitializing wilc1000...\n");
455
456 if (!wl->dev_irq_num &&
457 wl->hif_func->disable_interrupt) {
458 mutex_lock(&wl->hif_cs);
459 wl->hif_func->disable_interrupt(wl);
460 mutex_unlock(&wl->hif_cs);
461 }
462 complete(&wl->txq_event);
463
464 wlan_deinitialize_threads(dev);
465 deinit_irq(dev);
466
467 wilc_wlan_stop(wl, vif);
468 wilc_wlan_cleanup(dev);
469
470 wl->initialized = false;
471
472 netdev_dbg(dev, "wilc1000 deinitialization Done\n");
473 } else {
474 netdev_dbg(dev, "wilc1000 is not initialized\n");
475 }
476}
477
478static int wlan_initialize_threads(struct net_device *dev)
479{
480 struct wilc_vif *vif = netdev_priv(dev);
481 struct wilc *wilc = vif->wilc;
482
483 wilc->txq_thread = kthread_run(wilc_txq_task, (void *)wilc,
484 "%s-tx", dev->name);
485 if (IS_ERR(wilc->txq_thread)) {
486 netdev_err(dev, "couldn't create TXQ thread\n");
487 wilc->close = 1;
488 return PTR_ERR(wilc->txq_thread);
489 }
490 wait_for_completion(&wilc->txq_thread_started);
491
492 return 0;
493}
494
495static int wilc_wlan_initialize(struct net_device *dev, struct wilc_vif *vif)
496{
497 int ret = 0;
498 struct wilc *wl = vif->wilc;
499
500 if (!wl->initialized) {
501 wl->mac_status = WILC_MAC_STATUS_INIT;
502 wl->close = 0;
503
504 ret = wilc_wlan_init(dev);
505 if (ret)
506 return ret;
507
508 ret = wlan_initialize_threads(dev);
509 if (ret)
510 goto fail_wilc_wlan;
511
512 if (wl->dev_irq_num && init_irq(dev)) {
513 ret = -EIO;
514 goto fail_threads;
515 }
516
517 if (!wl->dev_irq_num &&
518 wl->hif_func->enable_interrupt &&
519 wl->hif_func->enable_interrupt(wl)) {
520 ret = -EIO;
521 goto fail_irq_init;
522 }
523
524 ret = wilc_wlan_get_firmware(dev);
525 if (ret)
526 goto fail_irq_enable;
527
528 ret = wilc1000_firmware_download(dev);
529 if (ret)
530 goto fail_irq_enable;
531
532 ret = wilc_start_firmware(dev);
533 if (ret)
534 goto fail_irq_enable;
535
536 if (wilc_wlan_cfg_get(vif, 1, WID_FIRMWARE_VERSION, 1, 0)) {
537 int size;
538 char firmware_ver[WILC_MAX_FW_VERSION_STR_SIZE];
539
540 size = wilc_wlan_cfg_get_val(wl, WID_FIRMWARE_VERSION,
541 firmware_ver,
542 sizeof(firmware_ver));
543 firmware_ver[size] = '\0';
544 netdev_dbg(dev, "Firmware Ver = %s\n", firmware_ver);
545 }
546
547 ret = wilc_init_fw_config(dev, vif);
548 if (ret) {
549 netdev_err(dev, "Failed to configure firmware\n");
550 goto fail_fw_start;
551 }
552 wl->initialized = true;
553 return 0;
554
555fail_fw_start:
556 wilc_wlan_stop(wl, vif);
557
558fail_irq_enable:
559 if (!wl->dev_irq_num &&
560 wl->hif_func->disable_interrupt)
561 wl->hif_func->disable_interrupt(wl);
562fail_irq_init:
563 if (wl->dev_irq_num)
564 deinit_irq(dev);
565fail_threads:
566 wlan_deinitialize_threads(dev);
567fail_wilc_wlan:
568 wilc_wlan_cleanup(dev);
569 netdev_err(dev, "WLAN initialization FAILED\n");
570 } else {
571 netdev_dbg(dev, "wilc1000 already initialized\n");
572 }
573 return ret;
574}
575
576static int mac_init_fn(struct net_device *ndev)
577{
578 netif_start_queue(ndev);
579 netif_stop_queue(ndev);
580
581 return 0;
582}
583
584static int wilc_mac_open(struct net_device *ndev)
585{
586 struct wilc_vif *vif = netdev_priv(ndev);
587 struct wilc *wl = vif->wilc;
588 int ret = 0;
589 struct mgmt_frame_regs mgmt_regs = {};
590 u8 addr[ETH_ALEN] __aligned(2);
591
592 if (!wl || !wl->dev) {
593 netdev_err(ndev, "device not ready\n");
594 return -ENODEV;
595 }
596
597 netdev_dbg(ndev, "MAC OPEN[%p]\n", ndev);
598
599 ret = wilc_init_host_int(ndev);
600 if (ret)
601 return ret;
602
603 ret = wilc_wlan_initialize(ndev, vif);
604 if (ret) {
605 wilc_deinit_host_int(ndev);
606 return ret;
607 }
608
609 wilc_set_operation_mode(vif, wilc_get_vif_idx(vif), vif->iftype,
610 vif->idx);
611
612 if (is_valid_ether_addr(ndev->dev_addr)) {
613 ether_addr_copy(addr, ndev->dev_addr);
614 wilc_set_mac_address(vif, addr);
615 } else {
616 wilc_get_mac_address(vif, addr);
617 eth_hw_addr_set(ndev, addr);
618 }
619 netdev_dbg(ndev, "Mac address: %pM\n", ndev->dev_addr);
620
621 if (!is_valid_ether_addr(ndev->dev_addr)) {
622 netdev_err(ndev, "Wrong MAC address\n");
623 wilc_deinit_host_int(ndev);
624 wilc_wlan_deinitialize(ndev);
625 return -EINVAL;
626 }
627
628 mgmt_regs.interface_stypes = vif->mgmt_reg_stypes;
629 /* so we detect a change */
630 vif->mgmt_reg_stypes = 0;
631 wilc_update_mgmt_frame_registrations(vif->ndev->ieee80211_ptr->wiphy,
632 vif->ndev->ieee80211_ptr,
633 &mgmt_regs);
634 netif_wake_queue(ndev);
635 wl->open_ifcs++;
636 vif->mac_opened = 1;
637 return 0;
638}
639
640static struct net_device_stats *mac_stats(struct net_device *dev)
641{
642 struct wilc_vif *vif = netdev_priv(dev);
643
644 return &vif->netstats;
645}
646
647static int wilc_set_mac_addr(struct net_device *dev, void *p)
648{
649 int result;
650 struct wilc_vif *vif = netdev_priv(dev);
651 struct wilc *wilc = vif->wilc;
652 struct sockaddr *addr = (struct sockaddr *)p;
653 unsigned char mac_addr[ETH_ALEN];
654 struct wilc_vif *tmp_vif;
655 int srcu_idx;
656
657 if (!is_valid_ether_addr(addr->sa_data))
658 return -EADDRNOTAVAIL;
659
660 if (!vif->mac_opened) {
661 eth_commit_mac_addr_change(dev, p);
662 return 0;
663 }
664
665 /* Verify MAC Address is not already in use: */
666
667 srcu_idx = srcu_read_lock(&wilc->srcu);
668 list_for_each_entry_rcu(tmp_vif, &wilc->vif_list, list) {
669 wilc_get_mac_address(tmp_vif, mac_addr);
670 if (ether_addr_equal(addr->sa_data, mac_addr)) {
671 if (vif != tmp_vif) {
672 srcu_read_unlock(&wilc->srcu, srcu_idx);
673 return -EADDRNOTAVAIL;
674 }
675 srcu_read_unlock(&wilc->srcu, srcu_idx);
676 return 0;
677 }
678 }
679 srcu_read_unlock(&wilc->srcu, srcu_idx);
680
681 result = wilc_set_mac_address(vif, (u8 *)addr->sa_data);
682 if (result)
683 return result;
684
685 eth_commit_mac_addr_change(dev, p);
686 return result;
687}
688
689static void wilc_set_multicast_list(struct net_device *dev)
690{
691 struct netdev_hw_addr *ha;
692 struct wilc_vif *vif = netdev_priv(dev);
693 int i;
694 u8 *mc_list;
695 u8 *cur_mc;
696
697 if (dev->flags & IFF_PROMISC)
698 return;
699
700 if (dev->flags & IFF_ALLMULTI ||
701 dev->mc.count > WILC_MULTICAST_TABLE_SIZE) {
702 wilc_setup_multicast_filter(vif, 0, 0, NULL);
703 return;
704 }
705
706 if (dev->mc.count == 0) {
707 wilc_setup_multicast_filter(vif, 1, 0, NULL);
708 return;
709 }
710
711 mc_list = kmalloc_array(dev->mc.count, ETH_ALEN, GFP_ATOMIC);
712 if (!mc_list)
713 return;
714
715 cur_mc = mc_list;
716 i = 0;
717 netdev_for_each_mc_addr(ha, dev) {
718 memcpy(cur_mc, ha->addr, ETH_ALEN);
719 netdev_dbg(dev, "Entry[%d]: %pM\n", i, cur_mc);
720 i++;
721 cur_mc += ETH_ALEN;
722 }
723
724 if (wilc_setup_multicast_filter(vif, 1, dev->mc.count, mc_list))
725 kfree(mc_list);
726}
727
728static void wilc_tx_complete(void *priv, int status)
729{
730 struct tx_complete_data *pv_data = priv;
731
732 dev_kfree_skb(pv_data->skb);
733 kfree(pv_data);
734}
735
736netdev_tx_t wilc_mac_xmit(struct sk_buff *skb, struct net_device *ndev)
737{
738 struct wilc_vif *vif = netdev_priv(ndev);
739 struct wilc *wilc = vif->wilc;
740 struct tx_complete_data *tx_data = NULL;
741 int queue_count;
742
743 if (skb->dev != ndev) {
744 netdev_err(ndev, "Packet not destined to this device\n");
745 dev_kfree_skb(skb);
746 return NETDEV_TX_OK;
747 }
748
749 tx_data = kmalloc(sizeof(*tx_data), GFP_ATOMIC);
750 if (!tx_data) {
751 dev_kfree_skb(skb);
752 netif_wake_queue(ndev);
753 return NETDEV_TX_OK;
754 }
755
756 tx_data->buff = skb->data;
757 tx_data->size = skb->len;
758 tx_data->skb = skb;
759
760 vif->netstats.tx_packets++;
761 vif->netstats.tx_bytes += tx_data->size;
762 queue_count = wilc_wlan_txq_add_net_pkt(ndev, tx_data,
763 tx_data->buff, tx_data->size,
764 wilc_tx_complete);
765
766 if (queue_count > FLOW_CONTROL_UPPER_THRESHOLD) {
767 int srcu_idx;
768 struct wilc_vif *vif;
769
770 srcu_idx = srcu_read_lock(&wilc->srcu);
771 list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
772 if (vif->mac_opened)
773 netif_stop_queue(vif->ndev);
774 }
775 srcu_read_unlock(&wilc->srcu, srcu_idx);
776 }
777
778 return NETDEV_TX_OK;
779}
780
781static int wilc_mac_close(struct net_device *ndev)
782{
783 struct wilc_vif *vif = netdev_priv(ndev);
784 struct wilc *wl = vif->wilc;
785
786 netdev_dbg(ndev, "Mac close\n");
787
788 if (wl->open_ifcs > 0)
789 wl->open_ifcs--;
790 else
791 return 0;
792
793 if (vif->ndev) {
794 netif_stop_queue(vif->ndev);
795
796 wilc_handle_disconnect(vif);
797 wilc_deinit_host_int(vif->ndev);
798 }
799
800 if (wl->open_ifcs == 0) {
801 netdev_dbg(ndev, "Deinitializing wilc1000\n");
802 wl->close = 1;
803 wilc_wlan_deinitialize(ndev);
804 }
805
806 vif->mac_opened = 0;
807
808 return 0;
809}
810
811void wilc_frmw_to_host(struct wilc *wilc, u8 *buff, u32 size,
812 u32 pkt_offset)
813{
814 unsigned int frame_len = 0;
815 int stats;
816 unsigned char *buff_to_send = NULL;
817 struct sk_buff *skb;
818 struct net_device *wilc_netdev;
819 struct wilc_vif *vif;
820
821 if (!wilc)
822 return;
823
824 wilc_netdev = get_if_handler(wilc, buff);
825 if (!wilc_netdev)
826 return;
827
828 buff += pkt_offset;
829 vif = netdev_priv(wilc_netdev);
830
831 if (size > 0) {
832 frame_len = size;
833 buff_to_send = buff;
834
835 skb = dev_alloc_skb(frame_len);
836 if (!skb)
837 return;
838
839 skb->dev = wilc_netdev;
840
841 skb_put_data(skb, buff_to_send, frame_len);
842
843 skb->protocol = eth_type_trans(skb, wilc_netdev);
844 vif->netstats.rx_packets++;
845 vif->netstats.rx_bytes += frame_len;
846 skb->ip_summed = CHECKSUM_UNNECESSARY;
847 stats = netif_rx(skb);
848 netdev_dbg(wilc_netdev, "netif_rx ret value is: %d\n", stats);
849 }
850}
851
852void wilc_wfi_mgmt_rx(struct wilc *wilc, u8 *buff, u32 size, bool is_auth)
853{
854 int srcu_idx;
855 struct wilc_vif *vif;
856
857 srcu_idx = srcu_read_lock(&wilc->srcu);
858 list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
859 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buff;
860 u16 type = le16_to_cpup((__le16 *)buff);
861 u32 type_bit = BIT(type >> 4);
862 u32 auth_bit = BIT(IEEE80211_STYPE_AUTH >> 4);
863
864 if ((vif->mgmt_reg_stypes & auth_bit &&
865 ieee80211_is_auth(mgmt->frame_control)) &&
866 vif->iftype == WILC_STATION_MODE && is_auth) {
867 wilc_wfi_mgmt_frame_rx(vif, buff, size);
868 break;
869 }
870
871 if (vif->priv.p2p_listen_state &&
872 vif->mgmt_reg_stypes & type_bit)
873 wilc_wfi_p2p_rx(vif, buff, size);
874
875 if (vif->monitor_flag)
876 wilc_wfi_monitor_rx(wilc->monitor_dev, buff, size);
877 }
878 srcu_read_unlock(&wilc->srcu, srcu_idx);
879}
880
881static const struct net_device_ops wilc_netdev_ops = {
882 .ndo_init = mac_init_fn,
883 .ndo_open = wilc_mac_open,
884 .ndo_stop = wilc_mac_close,
885 .ndo_set_mac_address = wilc_set_mac_addr,
886 .ndo_start_xmit = wilc_mac_xmit,
887 .ndo_get_stats = mac_stats,
888 .ndo_set_rx_mode = wilc_set_multicast_list,
889};
890
891void wilc_netdev_cleanup(struct wilc *wilc)
892{
893 struct wilc_vif *vif;
894 int srcu_idx, ifc_cnt = 0;
895
896 if (!wilc)
897 return;
898
899 if (wilc->firmware) {
900 release_firmware(wilc->firmware);
901 wilc->firmware = NULL;
902 }
903
904 srcu_idx = srcu_read_lock(&wilc->srcu);
905 list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
906 if (vif->ndev)
907 unregister_netdev(vif->ndev);
908 }
909 srcu_read_unlock(&wilc->srcu, srcu_idx);
910
911 wilc_wfi_deinit_mon_interface(wilc, false);
912 destroy_workqueue(wilc->hif_workqueue);
913
914 while (ifc_cnt < WILC_NUM_CONCURRENT_IFC) {
915 mutex_lock(&wilc->vif_mutex);
916 if (wilc->vif_num <= 0) {
917 mutex_unlock(&wilc->vif_mutex);
918 break;
919 }
920 vif = wilc_get_wl_to_vif(wilc);
921 if (!IS_ERR(vif))
922 list_del_rcu(&vif->list);
923
924 wilc->vif_num--;
925 mutex_unlock(&wilc->vif_mutex);
926 synchronize_srcu(&wilc->srcu);
927 ifc_cnt++;
928 }
929
930 wilc_wlan_cfg_deinit(wilc);
931 wlan_deinit_locks(wilc);
932 wiphy_unregister(wilc->wiphy);
933 wiphy_free(wilc->wiphy);
934}
935EXPORT_SYMBOL_GPL(wilc_netdev_cleanup);
936
937static u8 wilc_get_available_idx(struct wilc *wl)
938{
939 int idx = 0;
940 struct wilc_vif *vif;
941 int srcu_idx;
942
943 srcu_idx = srcu_read_lock(&wl->srcu);
944 list_for_each_entry_rcu(vif, &wl->vif_list, list) {
945 if (vif->idx == 0)
946 idx = 1;
947 else
948 idx = 0;
949 }
950 srcu_read_unlock(&wl->srcu, srcu_idx);
951 return idx;
952}
953
954struct wilc_vif *wilc_netdev_ifc_init(struct wilc *wl, const char *name,
955 int vif_type, enum nl80211_iftype type,
956 bool rtnl_locked)
957{
958 struct net_device *ndev;
959 struct wilc_vif *vif;
960 int ret;
961
962 ndev = alloc_etherdev(sizeof(*vif));
963 if (!ndev)
964 return ERR_PTR(-ENOMEM);
965
966 vif = netdev_priv(ndev);
967 ndev->ieee80211_ptr = &vif->priv.wdev;
968 strcpy(ndev->name, name);
969 vif->wilc = wl;
970 vif->ndev = ndev;
971 ndev->ml_priv = vif;
972
973 ndev->netdev_ops = &wilc_netdev_ops;
974
975 SET_NETDEV_DEV(ndev, wiphy_dev(wl->wiphy));
976
977 vif->priv.wdev.wiphy = wl->wiphy;
978 vif->priv.wdev.netdev = ndev;
979 vif->priv.wdev.iftype = type;
980 vif->priv.dev = ndev;
981
982 if (rtnl_locked)
983 ret = cfg80211_register_netdevice(ndev);
984 else
985 ret = register_netdev(ndev);
986
987 if (ret) {
988 ret = -EFAULT;
989 goto error;
990 }
991
992 wl->hif_workqueue = alloc_ordered_workqueue("%s-wq", WQ_MEM_RECLAIM,
993 ndev->name);
994 if (!wl->hif_workqueue) {
995 ret = -ENOMEM;
996 goto unregister_netdev;
997 }
998
999 ndev->needs_free_netdev = true;
1000 vif->iftype = vif_type;
1001 vif->idx = wilc_get_available_idx(wl);
1002 vif->mac_opened = 0;
1003 mutex_lock(&wl->vif_mutex);
1004 list_add_tail_rcu(&vif->list, &wl->vif_list);
1005 wl->vif_num += 1;
1006 mutex_unlock(&wl->vif_mutex);
1007 synchronize_srcu(&wl->srcu);
1008
1009 return vif;
1010
1011unregister_netdev:
1012 if (rtnl_locked)
1013 cfg80211_unregister_netdevice(ndev);
1014 else
1015 unregister_netdev(ndev);
1016 error:
1017 free_netdev(ndev);
1018 return ERR_PTR(ret);
1019}
1020
1021MODULE_DESCRIPTION("Atmel WILC1000 core wireless driver");
1022MODULE_LICENSE("GPL");
1023MODULE_FIRMWARE(WILC1000_FW(WILC1000_API_VER));