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
isr_uh_routine(int irq,void * user_data)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
isr_bh_routine(int irq,void * userdata)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
init_irq(struct net_device * dev)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
deinit_irq(struct net_device * dev)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
wilc_mac_indicate(struct wilc * wilc)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
get_if_handler(struct wilc * wilc,u8 * mac_header)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 wilc_for_each_vif(wilc, vif) {
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
wilc_wlan_set_bssid(struct net_device * wilc_netdev,const u8 * bssid,u8 mode)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
wilc_wlan_get_num_conn_ifcs(struct wilc * wilc)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 wilc_for_each_vif(wilc, vif) {
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
wilc_wake_tx_queues(struct wilc * wl)143 static void wilc_wake_tx_queues(struct wilc *wl)
144 {
145 int srcu_idx;
146 struct wilc_vif *ifc;
147
148 srcu_idx = srcu_read_lock(&wl->srcu);
149 wilc_for_each_vif(wl, ifc) {
150 if (ifc->mac_opened && netif_queue_stopped(ifc->ndev))
151 netif_wake_queue(ifc->ndev);
152 }
153 srcu_read_unlock(&wl->srcu, srcu_idx);
154 }
155
wilc_txq_task(void * vp)156 static int wilc_txq_task(void *vp)
157 {
158 int ret;
159 u32 txq_count;
160 struct wilc *wl = vp;
161
162 complete(&wl->txq_thread_started);
163 while (1) {
164 if (wait_for_completion_interruptible(&wl->txq_event))
165 continue;
166 if (wl->close) {
167 complete(&wl->txq_thread_started);
168
169 while (!kthread_should_stop())
170 schedule();
171 break;
172 }
173 do {
174 ret = wilc_wlan_handle_txq(wl, &txq_count);
175 if (txq_count < FLOW_CONTROL_LOWER_THRESHOLD) {
176 wilc_wake_tx_queues(wl);
177 }
178 if (ret != WILC_VMM_ENTRY_FULL_RETRY)
179 break;
180 /* Back off TX task from sending packets for some time.
181 * msleep_interruptible will allow RX task to run and
182 * free buffers. TX task will be in TASK_INTERRUPTIBLE
183 * state which will put the thread back to CPU running
184 * queue when it's signaled even if the timeout isn't
185 * elapsed. This gives faster chance for reserved SK
186 * buffers to be free.
187 */
188 msleep_interruptible(TX_BACKOFF_WEIGHT_MS);
189 } while (!wl->close);
190 }
191 return 0;
192 }
193
wilc_wlan_get_firmware(struct net_device * dev)194 static int wilc_wlan_get_firmware(struct net_device *dev)
195 {
196 struct wilc_vif *vif = netdev_priv(dev);
197 struct wilc *wilc = vif->wilc;
198 int chip_id;
199 const struct firmware *wilc_fw;
200 int ret;
201
202 chip_id = wilc_get_chipid(wilc, false);
203
204 netdev_info(dev, "ChipID [%x] loading firmware [%s]\n", chip_id,
205 WILC1000_FW(WILC1000_API_VER));
206
207 ret = request_firmware(&wilc_fw, WILC1000_FW(WILC1000_API_VER),
208 wilc->dev);
209 if (ret != 0) {
210 netdev_err(dev, "%s - firmware not available\n",
211 WILC1000_FW(WILC1000_API_VER));
212 return -EINVAL;
213 }
214 wilc->firmware = wilc_fw;
215
216 return 0;
217 }
218
wilc_start_firmware(struct net_device * dev)219 static int wilc_start_firmware(struct net_device *dev)
220 {
221 struct wilc_vif *vif = netdev_priv(dev);
222 struct wilc *wilc = vif->wilc;
223 int ret = 0;
224
225 ret = wilc_wlan_start(wilc);
226 if (ret)
227 return ret;
228
229 if (!wait_for_completion_timeout(&wilc->sync_event,
230 msecs_to_jiffies(5000)))
231 return -ETIME;
232
233 return 0;
234 }
235
wilc1000_firmware_download(struct net_device * dev)236 static int wilc1000_firmware_download(struct net_device *dev)
237 {
238 struct wilc_vif *vif = netdev_priv(dev);
239 struct wilc *wilc = vif->wilc;
240 int ret = 0;
241
242 if (!wilc->firmware) {
243 netdev_err(dev, "Firmware buffer is NULL\n");
244 return -ENOBUFS;
245 }
246
247 ret = wilc_wlan_firmware_download(wilc, wilc->firmware->data,
248 wilc->firmware->size);
249 if (ret)
250 return ret;
251
252 release_firmware(wilc->firmware);
253 wilc->firmware = NULL;
254
255 netdev_dbg(dev, "Download Succeeded\n");
256
257 return 0;
258 }
259
wilc_init_fw_config(struct net_device * dev,struct wilc_vif * vif)260 static int wilc_init_fw_config(struct net_device *dev, struct wilc_vif *vif)
261 {
262 struct wilc_priv *priv = &vif->priv;
263 struct host_if_drv *hif_drv;
264 u8 b;
265 u16 hw;
266 u32 w;
267
268 netdev_dbg(dev, "Start configuring Firmware\n");
269 hif_drv = (struct host_if_drv *)priv->hif_drv;
270 netdev_dbg(dev, "Host = %p\n", hif_drv);
271
272 w = vif->iftype;
273 cpu_to_le32s(&w);
274 if (!wilc_wlan_cfg_set(vif, 1, WID_SET_OPERATION_MODE, (u8 *)&w, 4,
275 0, 0))
276 goto fail;
277
278 b = WILC_FW_BSS_TYPE_INFRA;
279 if (!wilc_wlan_cfg_set(vif, 0, WID_BSS_TYPE, &b, 1, 0, 0))
280 goto fail;
281
282 b = WILC_FW_TX_RATE_AUTO;
283 if (!wilc_wlan_cfg_set(vif, 0, WID_CURRENT_TX_RATE, &b, 1, 0, 0))
284 goto fail;
285
286 b = WILC_FW_OPER_MODE_G_MIXED_11B_2;
287 if (!wilc_wlan_cfg_set(vif, 0, WID_11G_OPERATING_MODE, &b, 1, 0, 0))
288 goto fail;
289
290 b = WILC_FW_PREAMBLE_AUTO;
291 if (!wilc_wlan_cfg_set(vif, 0, WID_PREAMBLE, &b, 1, 0, 0))
292 goto fail;
293
294 b = WILC_FW_11N_PROT_AUTO;
295 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_PROT_MECH, &b, 1, 0, 0))
296 goto fail;
297
298 b = WILC_FW_ACTIVE_SCAN;
299 if (!wilc_wlan_cfg_set(vif, 0, WID_SCAN_TYPE, &b, 1, 0, 0))
300 goto fail;
301
302 b = WILC_FW_SITE_SURVEY_OFF;
303 if (!wilc_wlan_cfg_set(vif, 0, WID_SITE_SURVEY, &b, 1, 0, 0))
304 goto fail;
305
306 hw = 0xffff;
307 cpu_to_le16s(&hw);
308 if (!wilc_wlan_cfg_set(vif, 0, WID_RTS_THRESHOLD, (u8 *)&hw, 2, 0, 0))
309 goto fail;
310
311 hw = 2346;
312 cpu_to_le16s(&hw);
313 if (!wilc_wlan_cfg_set(vif, 0, WID_FRAG_THRESHOLD, (u8 *)&hw, 2, 0, 0))
314 goto fail;
315
316 b = 0;
317 if (!wilc_wlan_cfg_set(vif, 0, WID_BCAST_SSID, &b, 1, 0, 0))
318 goto fail;
319
320 b = 1;
321 if (!wilc_wlan_cfg_set(vif, 0, WID_QOS_ENABLE, &b, 1, 0, 0))
322 goto fail;
323
324 b = WILC_FW_NO_POWERSAVE;
325 if (!wilc_wlan_cfg_set(vif, 0, WID_POWER_MANAGEMENT, &b, 1, 0, 0))
326 goto fail;
327
328 b = WILC_FW_SEC_NO;
329 if (!wilc_wlan_cfg_set(vif, 0, WID_11I_MODE, &b, 1, 0, 0))
330 goto fail;
331
332 b = WILC_FW_AUTH_OPEN_SYSTEM;
333 if (!wilc_wlan_cfg_set(vif, 0, WID_AUTH_TYPE, &b, 1, 0, 0))
334 goto fail;
335
336 b = 3;
337 if (!wilc_wlan_cfg_set(vif, 0, WID_LISTEN_INTERVAL, &b, 1, 0, 0))
338 goto fail;
339
340 b = 3;
341 if (!wilc_wlan_cfg_set(vif, 0, WID_DTIM_PERIOD, &b, 1, 0, 0))
342 goto fail;
343
344 b = WILC_FW_ACK_POLICY_NORMAL;
345 if (!wilc_wlan_cfg_set(vif, 0, WID_ACK_POLICY, &b, 1, 0, 0))
346 goto fail;
347
348 b = 0;
349 if (!wilc_wlan_cfg_set(vif, 0, WID_USER_CONTROL_ON_TX_POWER, &b, 1,
350 0, 0))
351 goto fail;
352
353 b = 48;
354 if (!wilc_wlan_cfg_set(vif, 0, WID_TX_POWER_LEVEL_11A, &b, 1, 0, 0))
355 goto fail;
356
357 b = 28;
358 if (!wilc_wlan_cfg_set(vif, 0, WID_TX_POWER_LEVEL_11B, &b, 1, 0, 0))
359 goto fail;
360
361 hw = 100;
362 cpu_to_le16s(&hw);
363 if (!wilc_wlan_cfg_set(vif, 0, WID_BEACON_INTERVAL, (u8 *)&hw, 2, 0, 0))
364 goto fail;
365
366 b = WILC_FW_REKEY_POLICY_DISABLE;
367 if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_POLICY, &b, 1, 0, 0))
368 goto fail;
369
370 w = 84600;
371 cpu_to_le32s(&w);
372 if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_PERIOD, (u8 *)&w, 4, 0, 0))
373 goto fail;
374
375 w = 500;
376 cpu_to_le32s(&w);
377 if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_PACKET_COUNT, (u8 *)&w, 4, 0,
378 0))
379 goto fail;
380
381 b = 1;
382 if (!wilc_wlan_cfg_set(vif, 0, WID_SHORT_SLOT_ALLOWED, &b, 1, 0,
383 0))
384 goto fail;
385
386 b = WILC_FW_ERP_PROT_SELF_CTS;
387 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_ERP_PROT_TYPE, &b, 1, 0, 0))
388 goto fail;
389
390 b = 1;
391 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_ENABLE, &b, 1, 0, 0))
392 goto fail;
393
394 b = WILC_FW_11N_OP_MODE_HT_MIXED;
395 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_OPERATING_MODE, &b, 1, 0, 0))
396 goto fail;
397
398 b = 1;
399 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_TXOP_PROT_DISABLE, &b, 1, 0, 0))
400 goto fail;
401
402 b = WILC_FW_OBBS_NONHT_DETECT_PROTECT_REPORT;
403 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_OBSS_NONHT_DETECTION, &b, 1,
404 0, 0))
405 goto fail;
406
407 b = WILC_FW_HT_PROT_RTS_CTS_NONHT;
408 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_HT_PROT_TYPE, &b, 1, 0, 0))
409 goto fail;
410
411 b = 0;
412 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_RIFS_PROT_ENABLE, &b, 1, 0,
413 0))
414 goto fail;
415
416 b = 7;
417 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_CURRENT_TX_MCS, &b, 1, 0, 0))
418 goto fail;
419
420 b = 1;
421 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_IMMEDIATE_BA_ENABLED, &b, 1,
422 1, 0))
423 goto fail;
424
425 return 0;
426
427 fail:
428 return -EINVAL;
429 }
430
wlan_deinitialize_threads(struct net_device * dev)431 static void wlan_deinitialize_threads(struct net_device *dev)
432 {
433 struct wilc_vif *vif = netdev_priv(dev);
434 struct wilc *wl = vif->wilc;
435
436 wl->close = 1;
437
438 complete(&wl->txq_event);
439
440 if (wl->txq_thread) {
441 kthread_stop(wl->txq_thread);
442 wl->txq_thread = NULL;
443 }
444 }
445
wilc_wlan_deinitialize(struct net_device * dev)446 static void wilc_wlan_deinitialize(struct net_device *dev)
447 {
448 struct wilc_vif *vif = netdev_priv(dev);
449 struct wilc *wl = vif->wilc;
450
451 if (!wl) {
452 netdev_err(dev, "wl is NULL\n");
453 return;
454 }
455
456 if (wl->initialized) {
457 netdev_info(dev, "Deinitializing wilc1000...\n");
458
459 if (!wl->dev_irq_num &&
460 wl->hif_func->disable_interrupt) {
461 mutex_lock(&wl->hif_cs);
462 wl->hif_func->disable_interrupt(wl);
463 mutex_unlock(&wl->hif_cs);
464 }
465 complete(&wl->txq_event);
466
467 wlan_deinitialize_threads(dev);
468 deinit_irq(dev);
469
470 wilc_wlan_stop(wl, vif);
471 wilc_wlan_cleanup(dev);
472
473 wl->initialized = false;
474
475 netdev_dbg(dev, "wilc1000 deinitialization Done\n");
476 } else {
477 netdev_dbg(dev, "wilc1000 is not initialized\n");
478 }
479 }
480
wlan_initialize_threads(struct net_device * dev)481 static int wlan_initialize_threads(struct net_device *dev)
482 {
483 struct wilc_vif *vif = netdev_priv(dev);
484 struct wilc *wilc = vif->wilc;
485
486 wilc->txq_thread = kthread_run(wilc_txq_task, (void *)wilc,
487 "%s-tx", dev->name);
488 if (IS_ERR(wilc->txq_thread)) {
489 netdev_err(dev, "couldn't create TXQ thread\n");
490 wilc->close = 1;
491 return PTR_ERR(wilc->txq_thread);
492 }
493 wait_for_completion(&wilc->txq_thread_started);
494
495 return 0;
496 }
497
wilc_wlan_initialize(struct net_device * dev,struct wilc_vif * vif)498 static int wilc_wlan_initialize(struct net_device *dev, struct wilc_vif *vif)
499 {
500 int ret = 0;
501 struct wilc *wl = vif->wilc;
502
503 if (!wl->initialized) {
504 wl->mac_status = WILC_MAC_STATUS_INIT;
505 wl->close = 0;
506
507 ret = wilc_wlan_init(dev);
508 if (ret)
509 return ret;
510
511 ret = wlan_initialize_threads(dev);
512 if (ret)
513 goto fail_wilc_wlan;
514
515 if (wl->dev_irq_num && init_irq(dev)) {
516 ret = -EIO;
517 goto fail_threads;
518 }
519
520 if (!wl->dev_irq_num &&
521 wl->hif_func->enable_interrupt &&
522 wl->hif_func->enable_interrupt(wl)) {
523 ret = -EIO;
524 goto fail_irq_init;
525 }
526
527 ret = wilc_wlan_get_firmware(dev);
528 if (ret)
529 goto fail_irq_enable;
530
531 ret = wilc1000_firmware_download(dev);
532 if (ret)
533 goto fail_irq_enable;
534
535 ret = wilc_start_firmware(dev);
536 if (ret)
537 goto fail_irq_enable;
538
539 if (wilc_wlan_cfg_get(vif, 1, WID_FIRMWARE_VERSION, 1, 0)) {
540 int size;
541 char firmware_ver[WILC_MAX_FW_VERSION_STR_SIZE];
542
543 size = wilc_wlan_cfg_get_val(wl, WID_FIRMWARE_VERSION,
544 firmware_ver,
545 sizeof(firmware_ver));
546 firmware_ver[size] = '\0';
547 netdev_dbg(dev, "Firmware Ver = %s\n", firmware_ver);
548 }
549
550 ret = wilc_init_fw_config(dev, vif);
551 if (ret) {
552 netdev_err(dev, "Failed to configure firmware\n");
553 goto fail_fw_start;
554 }
555 wl->initialized = true;
556 return 0;
557
558 fail_fw_start:
559 wilc_wlan_stop(wl, vif);
560
561 fail_irq_enable:
562 if (!wl->dev_irq_num &&
563 wl->hif_func->disable_interrupt)
564 wl->hif_func->disable_interrupt(wl);
565 fail_irq_init:
566 if (wl->dev_irq_num)
567 deinit_irq(dev);
568 fail_threads:
569 wlan_deinitialize_threads(dev);
570 fail_wilc_wlan:
571 wilc_wlan_cleanup(dev);
572 netdev_err(dev, "WLAN initialization FAILED\n");
573 } else {
574 netdev_dbg(dev, "wilc1000 already initialized\n");
575 }
576 return ret;
577 }
578
mac_init_fn(struct net_device * ndev)579 static int mac_init_fn(struct net_device *ndev)
580 {
581 netif_start_queue(ndev);
582 netif_stop_queue(ndev);
583
584 return 0;
585 }
586
wilc_mac_open(struct net_device * ndev)587 static int wilc_mac_open(struct net_device *ndev)
588 {
589 struct wilc_vif *vif = netdev_priv(ndev);
590 struct wilc *wl = vif->wilc;
591 int ret = 0;
592 struct mgmt_frame_regs mgmt_regs = {};
593
594 if (!wl || !wl->dev) {
595 netdev_err(ndev, "device not ready\n");
596 return -ENODEV;
597 }
598
599 netdev_dbg(ndev, "MAC OPEN[%p]\n", ndev);
600
601 ret = wilc_init_host_int(ndev);
602 if (ret)
603 return ret;
604
605 ret = wilc_wlan_initialize(ndev, vif);
606 if (ret) {
607 wilc_deinit_host_int(ndev);
608 return ret;
609 }
610
611 netdev_dbg(ndev, "Mac address: %pM\n", ndev->dev_addr);
612 ret = wilc_set_mac_address(vif, ndev->dev_addr);
613 if (ret) {
614 netdev_err(ndev, "Failed to enforce MAC address in chip");
615 wilc_deinit_host_int(ndev);
616 if (!wl->open_ifcs)
617 wilc_wlan_deinitialize(ndev);
618 return ret;
619 }
620
621 wilc_set_operation_mode(vif, wilc_get_vif_idx(vif), vif->iftype,
622 vif->idx);
623
624 mgmt_regs.interface_stypes = vif->mgmt_reg_stypes;
625 /* so we detect a change */
626 vif->mgmt_reg_stypes = 0;
627 wilc_update_mgmt_frame_registrations(vif->ndev->ieee80211_ptr->wiphy,
628 vif->ndev->ieee80211_ptr,
629 &mgmt_regs);
630 netif_wake_queue(ndev);
631 wl->open_ifcs++;
632 vif->mac_opened = 1;
633 return 0;
634 }
635
mac_stats(struct net_device * dev)636 static struct net_device_stats *mac_stats(struct net_device *dev)
637 {
638 struct wilc_vif *vif = netdev_priv(dev);
639
640 return &vif->netstats;
641 }
642
wilc_set_mac_addr(struct net_device * dev,void * p)643 static int wilc_set_mac_addr(struct net_device *dev, void *p)
644 {
645 int result;
646 struct wilc_vif *vif = netdev_priv(dev);
647 struct wilc *wilc = vif->wilc;
648 struct sockaddr *addr = (struct sockaddr *)p;
649 unsigned char mac_addr[ETH_ALEN];
650 struct wilc_vif *tmp_vif;
651 int srcu_idx;
652
653 if (!is_valid_ether_addr(addr->sa_data))
654 return -EADDRNOTAVAIL;
655
656 if (!vif->mac_opened) {
657 eth_commit_mac_addr_change(dev, p);
658 return 0;
659 }
660
661 /* Verify MAC Address is not already in use: */
662
663 srcu_idx = srcu_read_lock(&wilc->srcu);
664 wilc_for_each_vif(wilc, tmp_vif) {
665 wilc_get_mac_address(tmp_vif, mac_addr);
666 if (ether_addr_equal(addr->sa_data, mac_addr)) {
667 if (vif != tmp_vif) {
668 srcu_read_unlock(&wilc->srcu, srcu_idx);
669 return -EADDRNOTAVAIL;
670 }
671 srcu_read_unlock(&wilc->srcu, srcu_idx);
672 return 0;
673 }
674 }
675 srcu_read_unlock(&wilc->srcu, srcu_idx);
676
677 result = wilc_set_mac_address(vif, addr->sa_data);
678 if (result)
679 return result;
680
681 eth_commit_mac_addr_change(dev, p);
682 return result;
683 }
684
wilc_set_multicast_list(struct net_device * dev)685 static void wilc_set_multicast_list(struct net_device *dev)
686 {
687 struct netdev_hw_addr *ha;
688 struct wilc_vif *vif = netdev_priv(dev);
689 int i;
690 u8 *mc_list;
691 u8 *cur_mc;
692
693 if (dev->flags & IFF_PROMISC)
694 return;
695
696 if (dev->flags & IFF_ALLMULTI ||
697 dev->mc.count > WILC_MULTICAST_TABLE_SIZE) {
698 wilc_setup_multicast_filter(vif, 0, 0, NULL);
699 return;
700 }
701
702 if (dev->mc.count == 0) {
703 wilc_setup_multicast_filter(vif, 1, 0, NULL);
704 return;
705 }
706
707 mc_list = kmalloc_array(dev->mc.count, ETH_ALEN, GFP_ATOMIC);
708 if (!mc_list)
709 return;
710
711 cur_mc = mc_list;
712 i = 0;
713 netdev_for_each_mc_addr(ha, dev) {
714 memcpy(cur_mc, ha->addr, ETH_ALEN);
715 netdev_dbg(dev, "Entry[%d]: %pM\n", i, cur_mc);
716 i++;
717 cur_mc += ETH_ALEN;
718 }
719
720 if (wilc_setup_multicast_filter(vif, 1, dev->mc.count, mc_list))
721 kfree(mc_list);
722 }
723
wilc_tx_complete(void * priv,int status)724 static void wilc_tx_complete(void *priv, int status)
725 {
726 struct tx_complete_data *pv_data = priv;
727
728 dev_kfree_skb(pv_data->skb);
729 kfree(pv_data);
730 }
731
wilc_mac_xmit(struct sk_buff * skb,struct net_device * ndev)732 netdev_tx_t wilc_mac_xmit(struct sk_buff *skb, struct net_device *ndev)
733 {
734 struct wilc_vif *vif = netdev_priv(ndev);
735 struct wilc *wilc = vif->wilc;
736 struct tx_complete_data *tx_data = NULL;
737 int queue_count;
738
739 if (skb->dev != ndev) {
740 netdev_err(ndev, "Packet not destined to this device\n");
741 dev_kfree_skb(skb);
742 return NETDEV_TX_OK;
743 }
744
745 tx_data = kmalloc(sizeof(*tx_data), GFP_ATOMIC);
746 if (!tx_data) {
747 dev_kfree_skb(skb);
748 netif_wake_queue(ndev);
749 return NETDEV_TX_OK;
750 }
751
752 tx_data->buff = skb->data;
753 tx_data->size = skb->len;
754 tx_data->skb = skb;
755
756 vif->netstats.tx_packets++;
757 vif->netstats.tx_bytes += tx_data->size;
758 queue_count = wilc_wlan_txq_add_net_pkt(ndev, tx_data,
759 tx_data->buff, tx_data->size,
760 wilc_tx_complete);
761
762 if (queue_count > FLOW_CONTROL_UPPER_THRESHOLD) {
763 int srcu_idx;
764 struct wilc_vif *vif;
765
766 srcu_idx = srcu_read_lock(&wilc->srcu);
767 wilc_for_each_vif(wilc, vif) {
768 if (vif->mac_opened)
769 netif_stop_queue(vif->ndev);
770 }
771 srcu_read_unlock(&wilc->srcu, srcu_idx);
772 }
773
774 return NETDEV_TX_OK;
775 }
776
wilc_mac_close(struct net_device * ndev)777 static int wilc_mac_close(struct net_device *ndev)
778 {
779 struct wilc_vif *vif = netdev_priv(ndev);
780 struct wilc *wl = vif->wilc;
781
782 netdev_dbg(ndev, "Mac close\n");
783
784 if (wl->open_ifcs > 0)
785 wl->open_ifcs--;
786 else
787 return 0;
788
789 if (vif->ndev) {
790 netif_stop_queue(vif->ndev);
791
792 wilc_handle_disconnect(vif);
793 wilc_deinit_host_int(vif->ndev);
794 }
795
796 if (wl->open_ifcs == 0) {
797 netdev_dbg(ndev, "Deinitializing wilc1000\n");
798 wl->close = 1;
799 wilc_wlan_deinitialize(ndev);
800 }
801
802 vif->mac_opened = 0;
803
804 return 0;
805 }
806
wilc_frmw_to_host(struct wilc * wilc,u8 * buff,u32 size,u32 pkt_offset)807 void wilc_frmw_to_host(struct wilc *wilc, u8 *buff, u32 size,
808 u32 pkt_offset)
809 {
810 unsigned char *buff_to_send = NULL;
811 struct net_device *wilc_netdev;
812 unsigned int frame_len = 0;
813 struct wilc_vif *vif;
814 struct sk_buff *skb;
815 int srcu_idx;
816 int stats;
817
818 if (!wilc)
819 return;
820
821 srcu_idx = srcu_read_lock(&wilc->srcu);
822 wilc_netdev = get_if_handler(wilc, buff);
823 if (!wilc_netdev)
824 goto out;
825
826 buff += pkt_offset;
827 vif = netdev_priv(wilc_netdev);
828
829 if (size > 0) {
830 frame_len = size;
831 buff_to_send = buff;
832
833 skb = dev_alloc_skb(frame_len);
834 if (!skb)
835 goto out;
836
837 skb->dev = wilc_netdev;
838
839 skb_put_data(skb, buff_to_send, frame_len);
840
841 skb->protocol = eth_type_trans(skb, wilc_netdev);
842 vif->netstats.rx_packets++;
843 vif->netstats.rx_bytes += frame_len;
844 skb->ip_summed = CHECKSUM_UNNECESSARY;
845 stats = netif_rx(skb);
846 netdev_dbg(wilc_netdev, "netif_rx ret value is: %d\n", stats);
847 }
848 out:
849 srcu_read_unlock(&wilc->srcu, srcu_idx);
850 }
851
wilc_wfi_mgmt_rx(struct wilc * wilc,u8 * buff,u32 size,bool is_auth)852 void 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 wilc_for_each_vif(wilc, vif) {
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
881 static 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
wilc_netdev_cleanup(struct wilc * wilc)891 void wilc_netdev_cleanup(struct wilc *wilc)
892 {
893 struct wilc_vif *vif, *vif_tmp;
894
895 if (!wilc)
896 return;
897
898 if (wilc->firmware) {
899 release_firmware(wilc->firmware);
900 wilc->firmware = NULL;
901 }
902
903 list_for_each_entry_safe(vif, vif_tmp, &wilc->vif_list, list) {
904 mutex_lock(&wilc->vif_mutex);
905 list_del_rcu(&vif->list);
906 wilc->vif_num--;
907 mutex_unlock(&wilc->vif_mutex);
908 synchronize_srcu(&wilc->srcu);
909 if (vif->ndev)
910 unregister_netdev(vif->ndev);
911 }
912
913 wilc_wfi_deinit_mon_interface(wilc, false);
914 destroy_workqueue(wilc->hif_workqueue);
915
916 wilc_wlan_cfg_deinit(wilc);
917 wlan_deinit_locks(wilc);
918 wiphy_unregister(wilc->wiphy);
919 wiphy_free(wilc->wiphy);
920 }
921 EXPORT_SYMBOL_GPL(wilc_netdev_cleanup);
922
wilc_get_available_idx(struct wilc * wl)923 static u8 wilc_get_available_idx(struct wilc *wl)
924 {
925 int idx = 0;
926 struct wilc_vif *vif;
927 int srcu_idx;
928
929 srcu_idx = srcu_read_lock(&wl->srcu);
930 wilc_for_each_vif(wl, vif) {
931 if (vif->idx == 0)
932 idx = 1;
933 else
934 idx = 0;
935 }
936 srcu_read_unlock(&wl->srcu, srcu_idx);
937 return idx;
938 }
939
wilc_netdev_ifc_init(struct wilc * wl,const char * name,int vif_type,enum nl80211_iftype type,bool rtnl_locked)940 struct wilc_vif *wilc_netdev_ifc_init(struct wilc *wl, const char *name,
941 int vif_type, enum nl80211_iftype type,
942 bool rtnl_locked)
943 {
944 u8 mac_address[ETH_ALEN];
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 ndev->needs_free_netdev = true;
970 vif->iftype = vif_type;
971 vif->idx = wilc_get_available_idx(wl);
972 vif->mac_opened = 0;
973
974 memcpy(mac_address, wl->nv_mac_address, ETH_ALEN);
975 /* WILC firmware uses locally administered MAC address for the
976 * second virtual interface (bit 1 of first byte set), but
977 * since it is possibly not loaded/running yet, reproduce this behavior
978 * in the driver during interface creation.
979 */
980 if (vif->idx)
981 mac_address[0] |= 0x2;
982
983 eth_hw_addr_set(vif->ndev, mac_address);
984
985 mutex_lock(&wl->vif_mutex);
986 list_add_tail_rcu(&vif->list, &wl->vif_list);
987 wl->vif_num += 1;
988 mutex_unlock(&wl->vif_mutex);
989 synchronize_srcu(&wl->srcu);
990
991 if (rtnl_locked)
992 ret = cfg80211_register_netdevice(ndev);
993 else
994 ret = register_netdev(ndev);
995
996 if (ret) {
997 ret = -EFAULT;
998 goto error_remove_vif;
999 }
1000
1001 return vif;
1002
1003 error_remove_vif:
1004 mutex_lock(&wl->vif_mutex);
1005 list_del_rcu(&vif->list);
1006 wl->vif_num -= 1;
1007 mutex_unlock(&wl->vif_mutex);
1008 synchronize_srcu(&wl->srcu);
1009 free_netdev(ndev);
1010 return ERR_PTR(ret);
1011 }
1012 EXPORT_SYMBOL_GPL(wilc_netdev_ifc_init);
1013
1014 MODULE_DESCRIPTION("Atmel WILC1000 core wireless driver");
1015 MODULE_LICENSE("GPL");
1016 MODULE_FIRMWARE(WILC1000_FW(WILC1000_API_VER));
1017