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wil6210: broadcast Tx
[deliverable/linux.git] / drivers / net / wireless / ath / wil6210 / wmi.c
CommitLineData
2be7d22f
VK		 1/*
2 * Copyright (c) 2012 Qualcomm Atheros, Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
2be7d22f 17#include <linux/etherdevice.h>
47e19af9 18#include <linux/if_arp.h>
2be7d22f
VK		 19
20#include "wil6210.h"
47e19af9 21#include "txrx.h"
2be7d22f 22#include "wmi.h"
98658095 23#include "trace.h"
2be7d22f
VK		 24
25/**
26 * WMI event receiving - theory of operations
27 *
28 * When firmware about to report WMI event, it fills memory area
29 * in the mailbox and raises misc. IRQ. Thread interrupt handler invoked for
30 * the misc IRQ, function @wmi_recv_cmd called by thread IRQ handler.
31 *
32 * @wmi_recv_cmd reads event, allocates memory chunk and attaches it to the
33 * event list @wil->pending_wmi_ev. Then, work queue @wil->wmi_wq wakes up
34 * and handles events within the @wmi_event_worker. Every event get detached
35 * from list, processed and deleted.
36 *
37 * Purpose for this mechanism is to release IRQ thread; otherwise,
38 * if WMI event handling involves another WMI command flow, this 2-nd flow
39 * won't be completed because of blocked IRQ thread.
40 */
41
42/**
43 * Addressing - theory of operations
44 *
45 * There are several buses present on the WIL6210 card.
46 * Same memory areas are visible at different address on
47 * the different busses. There are 3 main bus masters:
48 * - MAC CPU (ucode)
49 * - User CPU (firmware)
50 * - AHB (host)
51 *
52 * On the PCI bus, there is one BAR (BAR0) of 2Mb size, exposing
53 * AHB addresses starting from 0x880000
54 *
55 * Internally, firmware uses addresses that allows faster access but
56 * are invisible from the host. To read from these addresses, alternative
57 * AHB address must be used.
58 *
59 * Memory mapping
60 * Linker address PCI/Host address
61 * 0x880000 .. 0xa80000 2Mb BAR0
62 * 0x800000 .. 0x807000 0x900000 .. 0x907000 28k DCCM
63 * 0x840000 .. 0x857000 0x908000 .. 0x91f000 92k PERIPH
64 */
65
66/**
67 * @fw_mapping provides memory remapping table
68 */
69static const struct {
70 u32 from; /* linker address - from, inclusive */
71 u32 to; /* linker address - to, exclusive */
72 u32 host; /* PCI/Host address - BAR0 + 0x880000 */
73} fw_mapping[] = {
74 {0x000000, 0x040000, 0x8c0000}, /* FW code RAM 256k */
75 {0x800000, 0x808000, 0x900000}, /* FW data RAM 32k */
76 {0x840000, 0x860000, 0x908000}, /* peripheral data RAM 128k/96k used */
77 {0x880000, 0x88a000, 0x880000}, /* various RGF */
af6b48db 78 {0x8c0000, 0x949000, 0x8c0000}, /* trivial mapping for upper area */
2be7d22f
VK		 79 /*
80 * 920000..930000 ucode code RAM
81 * 930000..932000 ucode data RAM
af6b48db 82 * 932000..949000 back-door debug data
2be7d22f
VK		 83 */
84};
85
86/**
87 * return AHB address for given firmware/ucode internal (linker) address
88 * @x - internal address
89 * If address have no valid AHB mapping, return 0
90 */
91static u32 wmi_addr_remap(u32 x)
92{
93 uint i;
94
95 for (i = 0; i < ARRAY_SIZE(fw_mapping); i++) {
96 if ((x >= fw_mapping[i].from) && (x < fw_mapping[i].to))
97 return x + fw_mapping[i].host - fw_mapping[i].from;
98 }
99
100 return 0;
101}
102
103/**
104 * Check address validity for WMI buffer; remap if needed
105 * @ptr - internal (linker) fw/ucode address
106 *
107 * Valid buffer should be DWORD aligned
108 *
109 * return address for accessing buffer from the host;
110 * if buffer is not valid, return NULL.
111 */
112void __iomem *wmi_buffer(struct wil6210_priv *wil, __le32 ptr_)
113{
114 u32 off;
115 u32 ptr = le32_to_cpu(ptr_);
116
117 if (ptr % 4)
118 return NULL;
119
120 ptr = wmi_addr_remap(ptr);
121 if (ptr < WIL6210_FW_HOST_OFF)
122 return NULL;
123
124 off = HOSTADDR(ptr);
125 if (off > WIL6210_MEM_SIZE - 4)
126 return NULL;
127
128 return wil->csr + off;
129}
130
131/**
132 * Check address validity
133 */
134void __iomem *wmi_addr(struct wil6210_priv *wil, u32 ptr)
135{
136 u32 off;
137
138 if (ptr % 4)
139 return NULL;
140
141 if (ptr < WIL6210_FW_HOST_OFF)
142 return NULL;
143
144 off = HOSTADDR(ptr);
145 if (off > WIL6210_MEM_SIZE - 4)
146 return NULL;
147
148 return wil->csr + off;
149}
150
151int wmi_read_hdr(struct wil6210_priv *wil, __le32 ptr,
152 struct wil6210_mbox_hdr *hdr)
153{
154 void __iomem *src = wmi_buffer(wil, ptr);
155 if (!src)
156 return -EINVAL;
157
158 wil_memcpy_fromio_32(hdr, src, sizeof(*hdr));
159
160 return 0;
161}
162
163static int __wmi_send(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len)
164{
165 struct {
166 struct wil6210_mbox_hdr hdr;
167 struct wil6210_mbox_hdr_wmi wmi;
168 } __packed cmd = {
169 .hdr = {
170 .type = WIL_MBOX_HDR_TYPE_WMI,
171 .flags = 0,
172 .len = cpu_to_le16(sizeof(cmd.wmi) + len),
173 },
174 .wmi = {
f988b23f 175 .mid = 0,
2be7d22f 176 .id = cpu_to_le16(cmdid),
2be7d22f
VK		 177 },
178 };
179 struct wil6210_mbox_ring *r = &wil->mbox_ctl.tx;
180 struct wil6210_mbox_ring_desc d_head;
181 u32 next_head;
182 void __iomem *dst;
183 void __iomem *head = wmi_addr(wil, r->head);
184 uint retry;
185
186 if (sizeof(cmd) + len > r->entry_size) {
187 wil_err(wil, "WMI size too large: %d bytes, max is %d\n",
188 (int)(sizeof(cmd) + len), r->entry_size);
189 return -ERANGE;
2be7d22f
VK		 190 }
191
192 might_sleep();
193
194 if (!test_bit(wil_status_fwready, &wil->status)) {
195 wil_err(wil, "FW not ready\n");
196 return -EAGAIN;
197 }
198
199 if (!head) {
200 wil_err(wil, "WMI head is garbage: 0x%08x\n", r->head);
201 return -EINVAL;
202 }
203 /* read Tx head till it is not busy */
204 for (retry = 5; retry > 0; retry--) {
205 wil_memcpy_fromio_32(&d_head, head, sizeof(d_head));
206 if (d_head.sync == 0)
207 break;
208 msleep(20);
209 }
210 if (d_head.sync != 0) {
211 wil_err(wil, "WMI head busy\n");
212 return -EBUSY;
213 }
214 /* next head */
215 next_head = r->base + ((r->head - r->base + sizeof(d_head)) % r->size);
7743882d 216 wil_dbg_wmi(wil, "Head 0x%08x -> 0x%08x\n", r->head, next_head);
2be7d22f
VK		 217 /* wait till FW finish with previous command */
218 for (retry = 5; retry > 0; retry--) {
219 r->tail = ioread32(wil->csr + HOST_MBOX +
220 offsetof(struct wil6210_mbox_ctl, tx.tail));
221 if (next_head != r->tail)
222 break;
223 msleep(20);
224 }
225 if (next_head == r->tail) {
226 wil_err(wil, "WMI ring full\n");
227 return -EBUSY;
228 }
229 dst = wmi_buffer(wil, d_head.addr);
230 if (!dst) {
231 wil_err(wil, "invalid WMI buffer: 0x%08x\n",
232 le32_to_cpu(d_head.addr));
233 return -EINVAL;
234 }
235 cmd.hdr.seq = cpu_to_le16(++wil->wmi_seq);
236 /* set command */
7743882d
VK		 237 wil_dbg_wmi(wil, "WMI command 0x%04x [%d]\n", cmdid, len);
238 wil_hex_dump_wmi("Cmd ", DUMP_PREFIX_OFFSET, 16, 1, &cmd,
2be7d22f 239 sizeof(cmd), true);
7743882d 240 wil_hex_dump_wmi("cmd ", DUMP_PREFIX_OFFSET, 16, 1, buf,
2be7d22f
VK		 241 len, true);
242 wil_memcpy_toio_32(dst, &cmd, sizeof(cmd));
243 wil_memcpy_toio_32(dst + sizeof(cmd), buf, len);
244 /* mark entry as full */
245 iowrite32(1, wil->csr + HOSTADDR(r->head) +
246 offsetof(struct wil6210_mbox_ring_desc, sync));
247 /* advance next ptr */
248 iowrite32(r->head = next_head, wil->csr + HOST_MBOX +
249 offsetof(struct wil6210_mbox_ctl, tx.head));
250
f988b23f 251 trace_wil6210_wmi_cmd(&cmd.wmi, buf, len);
98658095 252
2be7d22f
VK		 253 /* interrupt to FW */
254 iowrite32(SW_INT_MBOX, wil->csr + HOST_SW_INT);
255
256 return 0;
257}
258
259int wmi_send(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len)
260{
261 int rc;
262
263 mutex_lock(&wil->wmi_mutex);
264 rc = __wmi_send(wil, cmdid, buf, len);
265 mutex_unlock(&wil->wmi_mutex);
266
267 return rc;
268}
269
270/*=== Event handlers ===*/
271static void wmi_evt_ready(struct wil6210_priv *wil, int id, void *d, int len)
272{
273 struct net_device *ndev = wil_to_ndev(wil);
274 struct wireless_dev *wdev = wil->wdev;
275 struct wmi_ready_event *evt = d;
b8023177
VK		 276 wil->fw_version = le32_to_cpu(evt->sw_version);
277 wil->n_mids = evt->numof_additional_mids;
2be7d22f 278
b8023177
VK		 279 wil_dbg_wmi(wil, "FW ver. %d; MAC %pM; %d MID's\n", wil->fw_version,
280 evt->mac, wil->n_mids);
2be7d22f
VK		 281
282 if (!is_valid_ether_addr(ndev->dev_addr)) {
283 memcpy(ndev->dev_addr, evt->mac, ETH_ALEN);
284 memcpy(ndev->perm_addr, evt->mac, ETH_ALEN);
285 }
286 snprintf(wdev->wiphy->fw_version, sizeof(wdev->wiphy->fw_version),
b8023177 287 "%d", wil->fw_version);
2be7d22f
VK		 288}
289
290static void wmi_evt_fw_ready(struct wil6210_priv *wil, int id, void *d,
291 int len)
292{
7743882d 293 wil_dbg_wmi(wil, "WMI: FW ready\n");
2be7d22f
VK		 294
295 set_bit(wil_status_fwready, &wil->status);
296 /* reuse wmi_ready for the firmware ready indication */
297 complete(&wil->wmi_ready);
298}
299
300static void wmi_evt_rx_mgmt(struct wil6210_priv *wil, int id, void *d, int len)
301{
302 struct wmi_rx_mgmt_packet_event *data = d;
303 struct wiphy *wiphy = wil_to_wiphy(wil);
304 struct ieee80211_mgmt *rx_mgmt_frame =
305 (struct ieee80211_mgmt *)data->payload;
306 int ch_no = data->info.channel+1;
307 u32 freq = ieee80211_channel_to_frequency(ch_no,
308 IEEE80211_BAND_60GHZ);
309 struct ieee80211_channel *channel = ieee80211_get_channel(wiphy, freq);
310 /* TODO convert LE to CPU */
311 s32 signal = 0; /* TODO */
312 __le16 fc = rx_mgmt_frame->frame_control;
313 u32 d_len = le32_to_cpu(data->info.len);
314 u16 d_status = le16_to_cpu(data->info.status);
315
7743882d 316 wil_dbg_wmi(wil, "MGMT: channel %d MCS %d SNR %d\n",
2be7d22f 317 data->info.channel, data->info.mcs, data->info.snr);
f27dbf78
VK		 318 wil_dbg_wmi(wil, "status 0x%04x len %d fc 0x%04x\n", d_status, d_len,
319 le16_to_cpu(fc));
7743882d 320 wil_dbg_wmi(wil, "qid %d mid %d cid %d\n",
2be7d22f
VK		 321 data->info.qid, data->info.mid, data->info.cid);
322
323 if (!channel) {
324 wil_err(wil, "Frame on unsupported channel\n");
325 return;
326 }
327
328 if (ieee80211_is_beacon(fc) || ieee80211_is_probe_resp(fc)) {
329 struct cfg80211_bss *bss;
a0f7845b
VK		 330
331 bss = cfg80211_inform_bss_frame(wiphy, channel, rx_mgmt_frame,
332 d_len, signal, GFP_KERNEL);
2be7d22f 333 if (bss) {
7743882d 334 wil_dbg_wmi(wil, "Added BSS %pM\n",
2be7d22f 335 rx_mgmt_frame->bssid);
5b112d3d 336 cfg80211_put_bss(wiphy, bss);
2be7d22f
VK		 337 } else {
338 wil_err(wil, "cfg80211_inform_bss() failed\n");
339 }
102b1d99
VK		 340 } else {
341 cfg80211_rx_mgmt(wil->wdev, freq, signal,
19504cf5 342 (void *)rx_mgmt_frame, d_len, 0, GFP_KERNEL);
2be7d22f
VK		 343 }
344}
345
346static void wmi_evt_scan_complete(struct wil6210_priv *wil, int id,
347 void *d, int len)
348{
349 if (wil->scan_request) {
350 struct wmi_scan_complete_event *data = d;
351 bool aborted = (data->status != 0);
352
7743882d 353 wil_dbg_wmi(wil, "SCAN_COMPLETE(0x%08x)\n", data->status);
2be7d22f
VK		 354 cfg80211_scan_done(wil->scan_request, aborted);
355 wil->scan_request = NULL;
356 } else {
357 wil_err(wil, "SCAN_COMPLETE while not scanning\n");
358 }
359}
360
361static void wmi_evt_connect(struct wil6210_priv *wil, int id, void *d, int len)
362{
363 struct net_device *ndev = wil_to_ndev(wil);
364 struct wireless_dev *wdev = wil->wdev;
365 struct wmi_connect_event *evt = d;
366 int ch; /* channel number */
367 struct station_info sinfo;
368 u8 *assoc_req_ie, *assoc_resp_ie;
369 size_t assoc_req_ielen, assoc_resp_ielen;
370 /* capinfo(u16) + listen_interval(u16) + IEs */
371 const size_t assoc_req_ie_offset = sizeof(u16) * 2;
372 /* capinfo(u16) + status_code(u16) + associd(u16) + IEs */
373 const size_t assoc_resp_ie_offset = sizeof(u16) * 3;
374
375 if (len < sizeof(*evt)) {
376 wil_err(wil, "Connect event too short : %d bytes\n", len);
377 return;
378 }
379 if (len != sizeof(*evt) + evt->beacon_ie_len + evt->assoc_req_len +
380 evt->assoc_resp_len) {
381 wil_err(wil,
382 "Connect event corrupted : %d != %d + %d + %d + %d\n",
383 len, (int)sizeof(*evt), evt->beacon_ie_len,
384 evt->assoc_req_len, evt->assoc_resp_len);
385 return;
386 }
3df2cd36
VK		 387 if (evt->cid >= WIL6210_MAX_CID) {
388 wil_err(wil, "Connect CID invalid : %d\n", evt->cid);
389 return;
390 }
391
2be7d22f 392 ch = evt->channel + 1;
7743882d 393 wil_dbg_wmi(wil, "Connect %pM channel [%d] cid %d\n",
2be7d22f 394 evt->bssid, ch, evt->cid);
7743882d 395 wil_hex_dump_wmi("connect AI : ", DUMP_PREFIX_OFFSET, 16, 1,
2be7d22f
VK		 396 evt->assoc_info, len - sizeof(*evt), true);
397
398 /* figure out IE's */
399 assoc_req_ie = &evt->assoc_info[evt->beacon_ie_len +
400 assoc_req_ie_offset];
401 assoc_req_ielen = evt->assoc_req_len - assoc_req_ie_offset;
402 if (evt->assoc_req_len <= assoc_req_ie_offset) {
403 assoc_req_ie = NULL;
404 assoc_req_ielen = 0;
405 }
406
407 assoc_resp_ie = &evt->assoc_info[evt->beacon_ie_len +
408 evt->assoc_req_len +
409 assoc_resp_ie_offset];
410 assoc_resp_ielen = evt->assoc_resp_len - assoc_resp_ie_offset;
411 if (evt->assoc_resp_len <= assoc_resp_ie_offset) {
412 assoc_resp_ie = NULL;
413 assoc_resp_ielen = 0;
414 }
415
416 if ((wdev->iftype == NL80211_IFTYPE_STATION) ||
417 (wdev->iftype == NL80211_IFTYPE_P2P_CLIENT)) {
b338f74e 418 if (!test_bit(wil_status_fwconnecting, &wil->status)) {
2be7d22f
VK		 419 wil_err(wil, "Not in connecting state\n");
420 return;
421 }
422 del_timer_sync(&wil->connect_timer);
423 cfg80211_connect_result(ndev, evt->bssid,
424 assoc_req_ie, assoc_req_ielen,
425 assoc_resp_ie, assoc_resp_ielen,
426 WLAN_STATUS_SUCCESS, GFP_KERNEL);
427
428 } else if ((wdev->iftype == NL80211_IFTYPE_AP) ||
429 (wdev->iftype == NL80211_IFTYPE_P2P_GO)) {
430 memset(&sinfo, 0, sizeof(sinfo));
431
432 sinfo.generation = wil->sinfo_gen++;
433
434 if (assoc_req_ie) {
435 sinfo.assoc_req_ies = assoc_req_ie;
436 sinfo.assoc_req_ies_len = assoc_req_ielen;
437 sinfo.filled |= STATION_INFO_ASSOC_REQ_IES;
438 }
439
440 cfg80211_new_sta(ndev, evt->bssid, &sinfo, GFP_KERNEL);
441 }
b338f74e 442 clear_bit(wil_status_fwconnecting, &wil->status);
2be7d22f
VK		 443 set_bit(wil_status_fwconnected, &wil->status);
444
445 /* FIXME FW can transmit only ucast frames to peer */
446 /* FIXME real ring_id instead of hard coded 0 */
3df2cd36
VK		 447 memcpy(wil->sta[evt->cid].addr, evt->bssid, ETH_ALEN);
448 wil->sta[evt->cid].status = wil_sta_conn_pending;
2be7d22f
VK		 449
450 wil->pending_connect_cid = evt->cid;
d81079f1 451 queue_work(wil->wmi_wq_conn, &wil->connect_worker);
2be7d22f
VK		 452}
453
454static void wmi_evt_disconnect(struct wil6210_priv *wil, int id,
455 void *d, int len)
456{
457 struct wmi_disconnect_event *evt = d;
3df2cd36 458 int cid = wil_find_cid(wil, evt->bssid);
2be7d22f 459
3df2cd36
VK		 460 wil_dbg_wmi(wil, "Disconnect %pM CID %d reason %d proto %d wmi\n",
461 evt->bssid, cid,
2be7d22f
VK		 462 evt->protocol_reason_status, evt->disconnect_reason);
463
464 wil->sinfo_gen++;
465
3df2cd36
VK		 466 /* TODO: fix for multiple connections */
467
2be7d22f 468 wil6210_disconnect(wil, evt->bssid);
3df2cd36
VK		 469 if (cid >= 0)
470 wil->sta[cid].status = wil_sta_unused;
2be7d22f
VK		 471}
472
473static void wmi_evt_notify(struct wil6210_priv *wil, int id, void *d, int len)
474{
475 struct wmi_notify_req_done_event *evt = d;
476
477 if (len < sizeof(*evt)) {
478 wil_err(wil, "Short NOTIFY event\n");
479 return;
480 }
481
482 wil->stats.tsf = le64_to_cpu(evt->tsf);
483 wil->stats.snr = le32_to_cpu(evt->snr_val);
484 wil->stats.bf_mcs = le16_to_cpu(evt->bf_mcs);
485 wil->stats.my_rx_sector = le16_to_cpu(evt->my_rx_sector);
486 wil->stats.my_tx_sector = le16_to_cpu(evt->my_tx_sector);
487 wil->stats.peer_rx_sector = le16_to_cpu(evt->other_rx_sector);
488 wil->stats.peer_tx_sector = le16_to_cpu(evt->other_tx_sector);
7743882d 489 wil_dbg_wmi(wil, "Link status, MCS %d TSF 0x%016llx\n"
2be7d22f
VK		 490 "BF status 0x%08x SNR 0x%08x\n"
491 "Tx Tpt %d goodput %d Rx goodput %d\n"
492 "Sectors(rx:tx) my %d:%d peer %d:%d\n",
493 wil->stats.bf_mcs, wil->stats.tsf, evt->status,
494 wil->stats.snr, le32_to_cpu(evt->tx_tpt),
495 le32_to_cpu(evt->tx_goodput), le32_to_cpu(evt->rx_goodput),
496 wil->stats.my_rx_sector, wil->stats.my_tx_sector,
497 wil->stats.peer_rx_sector, wil->stats.peer_tx_sector);
498}
499
500/*
501 * Firmware reports EAPOL frame using WME event.
502 * Reconstruct Ethernet frame and deliver it via normal Rx
503 */
504static void wmi_evt_eapol_rx(struct wil6210_priv *wil, int id,
505 void *d, int len)
506{
507 struct net_device *ndev = wil_to_ndev(wil);
508 struct wmi_eapol_rx_event *evt = d;
509 u16 eapol_len = le16_to_cpu(evt->eapol_len);
510 int sz = eapol_len + ETH_HLEN;
511 struct sk_buff *skb;
512 struct ethhdr *eth;
513
7743882d 514 wil_dbg_wmi(wil, "EAPOL len %d from %pM\n", eapol_len,
2be7d22f
VK		 515 evt->src_mac);
516
517 if (eapol_len > 196) { /* TODO: revisit size limit */
518 wil_err(wil, "EAPOL too large\n");
519 return;
520 }
521
522 skb = alloc_skb(sz, GFP_KERNEL);
523 if (!skb) {
524 wil_err(wil, "Failed to allocate skb\n");
525 return;
526 }
527 eth = (struct ethhdr *)skb_put(skb, ETH_HLEN);
528 memcpy(eth->h_dest, ndev->dev_addr, ETH_ALEN);
529 memcpy(eth->h_source, evt->src_mac, ETH_ALEN);
530 eth->h_proto = cpu_to_be16(ETH_P_PAE);
531 memcpy(skb_put(skb, eapol_len), evt->eapol, eapol_len);
532 skb->protocol = eth_type_trans(skb, ndev);
533 if (likely(netif_rx_ni(skb) == NET_RX_SUCCESS)) {
534 ndev->stats.rx_packets++;
535 ndev->stats.rx_bytes += skb->len;
536 } else {
537 ndev->stats.rx_dropped++;
538 }
539}
540
3442a504
VK		 541static void wmi_evt_linkup(struct wil6210_priv *wil, int id, void *d, int len)
542{
543 struct net_device *ndev = wil_to_ndev(wil);
544 struct wmi_data_port_open_event *evt = d;
545
546 wil_dbg_wmi(wil, "Link UP for CID %d\n", evt->cid);
547
548 netif_carrier_on(ndev);
549}
550
551static void wmi_evt_linkdown(struct wil6210_priv *wil, int id, void *d, int len)
552{
553 struct net_device *ndev = wil_to_ndev(wil);
554 struct wmi_wbe_link_down_event *evt = d;
555
556 wil_dbg_wmi(wil, "Link DOWN for CID %d, reason %d\n",
557 evt->cid, le32_to_cpu(evt->reason));
558
559 netif_carrier_off(ndev);
560}
561
249a382b
VK		 562static void wmi_evt_ba_status(struct wil6210_priv *wil, int id, void *d,
563 int len)
564{
565 struct wmi_vring_ba_status_event *evt = d;
b4490f42 566 uint cid, i;
249a382b
VK		 567
568 wil_dbg_wmi(wil, "BACK[%d] %s {%d} timeout %d\n",
b4490f42
VK		 569 evt->ringid, evt->status == WMI_BA_AGREED ? "OK" : "N/A",
570 evt->agg_wsize, __le16_to_cpu(evt->ba_timeout));
571 for (cid = 0; cid < WIL6210_MAX_CID; cid++) {
572 struct wil_sta_info *sta = &wil->sta[cid];
573
574 if (sta->status == wil_sta_unused)
575 continue;
576 wil_dbg_wmi(wil, "Init BACK for CID %d %pM\n", cid, sta->addr);
577 for (i = 0; i < WIL_STA_TID_NUM; i++) {
578 struct wil_tid_ampdu_rx *r = sta->tid_rx[i];
579 sta->tid_rx[i] = NULL;
580 wil_tid_ampdu_rx_free(wil, r);
581 if ((evt->status == WMI_BA_AGREED) && evt->agg_wsize)
582 sta->tid_rx[i] = wil_tid_ampdu_rx_alloc(wil,
583 evt->agg_wsize, 0);
584 }
585 }
586
249a382b
VK		 587}
588
2be7d22f
VK		 589static const struct {
590 int eventid;
591 void (*handler)(struct wil6210_priv *wil, int eventid,
592 void *data, int data_len);
593} wmi_evt_handlers[] = {
594 {WMI_READY_EVENTID, wmi_evt_ready},
595 {WMI_FW_READY_EVENTID, wmi_evt_fw_ready},
596 {WMI_RX_MGMT_PACKET_EVENTID, wmi_evt_rx_mgmt},
597 {WMI_SCAN_COMPLETE_EVENTID, wmi_evt_scan_complete},
598 {WMI_CONNECT_EVENTID, wmi_evt_connect},
599 {WMI_DISCONNECT_EVENTID, wmi_evt_disconnect},
600 {WMI_NOTIFY_REQ_DONE_EVENTID, wmi_evt_notify},
601 {WMI_EAPOL_RX_EVENTID, wmi_evt_eapol_rx},
3442a504
VK		 602 {WMI_DATA_PORT_OPEN_EVENTID, wmi_evt_linkup},
603 {WMI_WBE_LINKDOWN_EVENTID, wmi_evt_linkdown},
249a382b 604 {WMI_BA_STATUS_EVENTID, wmi_evt_ba_status},
2be7d22f
VK		 605};
606
607/*
608 * Run in IRQ context
609 * Extract WMI command from mailbox. Queue it to the @wil->pending_wmi_ev
610 * that will be eventually handled by the @wmi_event_worker in the thread
611 * context of thread "wil6210_wmi"
612 */
613void wmi_recv_cmd(struct wil6210_priv *wil)
614{
615 struct wil6210_mbox_ring_desc d_tail;
616 struct wil6210_mbox_hdr hdr;
617 struct wil6210_mbox_ring *r = &wil->mbox_ctl.rx;
618 struct pending_wmi_event *evt;
619 u8 *cmd;
620 void __iomem *src;
621 ulong flags;
622
55f7acdd
VK		 623 if (!test_bit(wil_status_reset_done, &wil->status)) {
624 wil_err(wil, "Reset not completed\n");
625 return;
626 }
627
2be7d22f
VK		 628 for (;;) {
629 u16 len;
630
631 r->head = ioread32(wil->csr + HOST_MBOX +
632 offsetof(struct wil6210_mbox_ctl, rx.head));
633 if (r->tail == r->head)
634 return;
635
636 /* read cmd from tail */
637 wil_memcpy_fromio_32(&d_tail, wil->csr + HOSTADDR(r->tail),
638 sizeof(struct wil6210_mbox_ring_desc));
639 if (d_tail.sync == 0) {
640 wil_err(wil, "Mbox evt not owned by FW?\n");
641 return;
642 }
643
644 if (0 != wmi_read_hdr(wil, d_tail.addr, &hdr)) {
645 wil_err(wil, "Mbox evt at 0x%08x?\n",
646 le32_to_cpu(d_tail.addr));
647 return;
648 }
649
650 len = le16_to_cpu(hdr.len);
651 src = wmi_buffer(wil, d_tail.addr) +
652 sizeof(struct wil6210_mbox_hdr);
653 evt = kmalloc(ALIGN(offsetof(struct pending_wmi_event,
654 event.wmi) + len, 4),
655 GFP_KERNEL);
14f8dc49 656 if (!evt)
2be7d22f 657 return;
14f8dc49 658
2be7d22f
VK		 659 evt->event.hdr = hdr;
660 cmd = (void *)&evt->event.wmi;
661 wil_memcpy_fromio_32(cmd, src, len);
662 /* mark entry as empty */
663 iowrite32(0, wil->csr + HOSTADDR(r->tail) +
664 offsetof(struct wil6210_mbox_ring_desc, sync));
665 /* indicate */
7743882d 666 wil_dbg_wmi(wil, "Mbox evt %04x %04x %04x %02x\n",
2be7d22f
VK		 667 le16_to_cpu(hdr.seq), len, le16_to_cpu(hdr.type),
668 hdr.flags);
669 if ((hdr.type == WIL_MBOX_HDR_TYPE_WMI) &&
670 (len >= sizeof(struct wil6210_mbox_hdr_wmi))) {
f988b23f
VK		 671 struct wil6210_mbox_hdr_wmi *wmi = &evt->event.wmi;
672 u16 id = le16_to_cpu(wmi->id);
673 u32 tstamp = le32_to_cpu(wmi->timestamp);
674 wil_dbg_wmi(wil, "WMI event 0x%04x MID %d @%d msec\n",
675 id, wmi->mid, tstamp);
676 trace_wil6210_wmi_event(wmi, &wmi[1],
677 len - sizeof(*wmi));
2be7d22f 678 }
7743882d 679 wil_hex_dump_wmi("evt ", DUMP_PREFIX_OFFSET, 16, 1,
2be7d22f
VK		 680 &evt->event.hdr, sizeof(hdr) + len, true);
681
682 /* advance tail */
683 r->tail = r->base + ((r->tail - r->base +
684 sizeof(struct wil6210_mbox_ring_desc)) % r->size);
685 iowrite32(r->tail, wil->csr + HOST_MBOX +
686 offsetof(struct wil6210_mbox_ctl, rx.tail));
687
688 /* add to the pending list */
689 spin_lock_irqsave(&wil->wmi_ev_lock, flags);
690 list_add_tail(&evt->list, &wil->pending_wmi_ev);
691 spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
692 {
693 int q = queue_work(wil->wmi_wq,
694 &wil->wmi_event_worker);
7743882d 695 wil_dbg_wmi(wil, "queue_work -> %d\n", q);
2be7d22f
VK		 696 }
697 }
698}
699
700int wmi_call(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len,
701 u16 reply_id, void *reply, u8 reply_size, int to_msec)
702{
703 int rc;
704 int remain;
705
706 mutex_lock(&wil->wmi_mutex);
707
708 rc = __wmi_send(wil, cmdid, buf, len);
709 if (rc)
710 goto out;
711
712 wil->reply_id = reply_id;
713 wil->reply_buf = reply;
714 wil->reply_size = reply_size;
715 remain = wait_for_completion_timeout(&wil->wmi_ready,
716 msecs_to_jiffies(to_msec));
717 if (0 == remain) {
718 wil_err(wil, "wmi_call(0x%04x->0x%04x) timeout %d msec\n",
719 cmdid, reply_id, to_msec);
720 rc = -ETIME;
721 } else {
7743882d 722 wil_dbg_wmi(wil,
2be7d22f
VK		 723 "wmi_call(0x%04x->0x%04x) completed in %d msec\n",
724 cmdid, reply_id,
725 to_msec - jiffies_to_msecs(remain));
726 }
727 wil->reply_id = 0;
728 wil->reply_buf = NULL;
729 wil->reply_size = 0;
730 out:
731 mutex_unlock(&wil->wmi_mutex);
732
733 return rc;
734}
735
736int wmi_echo(struct wil6210_priv *wil)
737{
738 struct wmi_echo_cmd cmd = {
739 .value = cpu_to_le32(0x12345678),
740 };
741
742 return wmi_call(wil, WMI_ECHO_CMDID, &cmd, sizeof(cmd),
743 WMI_ECHO_RSP_EVENTID, NULL, 0, 20);
744}
745
746int wmi_set_mac_address(struct wil6210_priv *wil, void *addr)
747{
748 struct wmi_set_mac_address_cmd cmd;
749
750 memcpy(cmd.mac, addr, ETH_ALEN);
751
7743882d 752 wil_dbg_wmi(wil, "Set MAC %pM\n", addr);
2be7d22f
VK		 753
754 return wmi_send(wil, WMI_SET_MAC_ADDRESS_CMDID, &cmd, sizeof(cmd));
755}
756
b8023177 757int wmi_pcp_start(struct wil6210_priv *wil, int bi, u8 wmi_nettype, u8 chan)
2be7d22f 758{
b8023177
VK		 759 int rc;
760
761 struct wmi_pcp_start_cmd cmd = {
2be7d22f
VK		 762 .bcon_interval = cpu_to_le16(bi),
763 .network_type = wmi_nettype,
764 .disable_sec_offload = 1,
adc2d122 765 .channel = chan - 1,
2be7d22f 766 };
b8023177
VK		 767 struct {
768 struct wil6210_mbox_hdr_wmi wmi;
769 struct wmi_pcp_started_event evt;
770 } __packed reply;
2be7d22f
VK		 771
772 if (!wil->secure_pcp)
773 cmd.disable_sec = 1;
774
8b5c7f6c
VK		 775 /*
776 * Processing time may be huge, in case of secure AP it takes about
777 * 3500ms for FW to start AP
778 */
b8023177 779 rc = wmi_call(wil, WMI_PCP_START_CMDID, &cmd, sizeof(cmd),
8b5c7f6c 780 WMI_PCP_STARTED_EVENTID, &reply, sizeof(reply), 5000);
b8023177
VK		 781 if (rc)
782 return rc;
783
784 if (reply.evt.status != WMI_FW_STATUS_SUCCESS)
785 rc = -EINVAL;
786
787 return rc;
788}
789
790int wmi_pcp_stop(struct wil6210_priv *wil)
791{
792 return wmi_call(wil, WMI_PCP_STOP_CMDID, NULL, 0,
793 WMI_PCP_STOPPED_EVENTID, NULL, 0, 20);
2be7d22f
VK		 794}
795
796int wmi_set_ssid(struct wil6210_priv *wil, u8 ssid_len, const void *ssid)
797{
798 struct wmi_set_ssid_cmd cmd = {
799 .ssid_len = cpu_to_le32(ssid_len),
800 };
801
802 if (ssid_len > sizeof(cmd.ssid))
803 return -EINVAL;
804
805 memcpy(cmd.ssid, ssid, ssid_len);
806
807 return wmi_send(wil, WMI_SET_SSID_CMDID, &cmd, sizeof(cmd));
808}
809
810int wmi_get_ssid(struct wil6210_priv *wil, u8 *ssid_len, void *ssid)
811{
812 int rc;
813 struct {
814 struct wil6210_mbox_hdr_wmi wmi;
815 struct wmi_set_ssid_cmd cmd;
816 } __packed reply;
817 int len; /* reply.cmd.ssid_len in CPU order */
818
819 rc = wmi_call(wil, WMI_GET_SSID_CMDID, NULL, 0, WMI_GET_SSID_EVENTID,
820 &reply, sizeof(reply), 20);
821 if (rc)
822 return rc;
823
824 len = le32_to_cpu(reply.cmd.ssid_len);
825 if (len > sizeof(reply.cmd.ssid))
826 return -EINVAL;
827
828 *ssid_len = len;
829 memcpy(ssid, reply.cmd.ssid, len);
830
831 return 0;
832}
833
834int wmi_set_channel(struct wil6210_priv *wil, int channel)
835{
836 struct wmi_set_pcp_channel_cmd cmd = {
837 .channel = channel - 1,
838 };
839
840 return wmi_send(wil, WMI_SET_PCP_CHANNEL_CMDID, &cmd, sizeof(cmd));
841}
842
843int wmi_get_channel(struct wil6210_priv *wil, int *channel)
844{
845 int rc;
846 struct {
847 struct wil6210_mbox_hdr_wmi wmi;
848 struct wmi_set_pcp_channel_cmd cmd;
849 } __packed reply;
850
851 rc = wmi_call(wil, WMI_GET_PCP_CHANNEL_CMDID, NULL, 0,
852 WMI_GET_PCP_CHANNEL_EVENTID, &reply, sizeof(reply), 20);
853 if (rc)
854 return rc;
855
856 if (reply.cmd.channel > 3)
857 return -EINVAL;
858
859 *channel = reply.cmd.channel + 1;
860
861 return 0;
862}
863
b8023177
VK		 864int wmi_p2p_cfg(struct wil6210_priv *wil, int channel)
865{
866 struct wmi_p2p_cfg_cmd cmd = {
867 .discovery_mode = WMI_DISCOVERY_MODE_NON_OFFLOAD,
868 .channel = channel - 1,
869 };
870
871 return wmi_send(wil, WMI_P2P_CFG_CMDID, &cmd, sizeof(cmd));
872}
873
2be7d22f
VK		 874int wmi_del_cipher_key(struct wil6210_priv *wil, u8 key_index,
875 const void *mac_addr)
876{
877 struct wmi_delete_cipher_key_cmd cmd = {
878 .key_index = key_index,
879 };
880
881 if (mac_addr)
882 memcpy(cmd.mac, mac_addr, WMI_MAC_LEN);
883
884 return wmi_send(wil, WMI_DELETE_CIPHER_KEY_CMDID, &cmd, sizeof(cmd));
885}
886
887int wmi_add_cipher_key(struct wil6210_priv *wil, u8 key_index,
888 const void *mac_addr, int key_len, const void *key)
889{
890 struct wmi_add_cipher_key_cmd cmd = {
891 .key_index = key_index,
892 .key_usage = WMI_KEY_USE_PAIRWISE,
893 .key_len = key_len,
894 };
895
896 if (!key || (key_len > sizeof(cmd.key)))
897 return -EINVAL;
898
899 memcpy(cmd.key, key, key_len);
900 if (mac_addr)
901 memcpy(cmd.mac, mac_addr, WMI_MAC_LEN);
902
903 return wmi_send(wil, WMI_ADD_CIPHER_KEY_CMDID, &cmd, sizeof(cmd));
904}
905
906int wmi_set_ie(struct wil6210_priv *wil, u8 type, u16 ie_len, const void *ie)
907{
908 int rc;
909 u16 len = sizeof(struct wmi_set_appie_cmd) + ie_len;
910 struct wmi_set_appie_cmd *cmd = kzalloc(len, GFP_KERNEL);
14f8dc49 911 if (!cmd)
2be7d22f 912 return -ENOMEM;
2be7d22f
VK		 913
914 cmd->mgmt_frm_type = type;
915 /* BUG: FW API define ieLen as u8. Will fix FW */
916 cmd->ie_len = cpu_to_le16(ie_len);
917 memcpy(cmd->ie_info, ie, ie_len);
03866e7d 918 rc = wmi_send(wil, WMI_SET_APPIE_CMDID, cmd, len);
2be7d22f
VK		 919 kfree(cmd);
920
921 return rc;
922}
923
1647f12f
VK		 924/**
925 * wmi_rxon - turn radio on/off
926 * @on: turn on if true, off otherwise
927 *
928 * Only switch radio. Channel should be set separately.
929 * No timeout for rxon - radio turned on forever unless some other call
930 * turns it off
931 */
932int wmi_rxon(struct wil6210_priv *wil, bool on)
933{
934 int rc;
935 struct {
936 struct wil6210_mbox_hdr_wmi wmi;
937 struct wmi_listen_started_event evt;
938 } __packed reply;
939
940 wil_info(wil, "%s(%s)\n", __func__, on ? "on" : "off");
941
942 if (on) {
943 rc = wmi_call(wil, WMI_START_LISTEN_CMDID, NULL, 0,
944 WMI_LISTEN_STARTED_EVENTID,
945 &reply, sizeof(reply), 100);
946 if ((rc == 0) && (reply.evt.status != WMI_FW_STATUS_SUCCESS))
947 rc = -EINVAL;
948 } else {
949 rc = wmi_call(wil, WMI_DISCOVERY_STOP_CMDID, NULL, 0,
950 WMI_DISCOVERY_STOPPED_EVENTID, NULL, 0, 20);
951 }
952
953 return rc;
954}
955
47e19af9
VK		 956int wmi_rx_chain_add(struct wil6210_priv *wil, struct vring *vring)
957{
958 struct wireless_dev *wdev = wil->wdev;
959 struct net_device *ndev = wil_to_ndev(wil);
960 struct wmi_cfg_rx_chain_cmd cmd = {
961 .action = WMI_RX_CHAIN_ADD,
962 .rx_sw_ring = {
963 .max_mpdu_size = cpu_to_le16(RX_BUF_LEN),
964 .ring_mem_base = cpu_to_le64(vring->pa),
965 .ring_size = cpu_to_le16(vring->size),
966 },
967 .mid = 0, /* TODO - what is it? */
968 .decap_trans_type = WMI_DECAP_TYPE_802_3,
b4490f42 969 .reorder_type = WMI_RX_SW_REORDER,
47e19af9
VK		 970 };
971 struct {
972 struct wil6210_mbox_hdr_wmi wmi;
973 struct wmi_cfg_rx_chain_done_event evt;
974 } __packed evt;
975 int rc;
976
977 if (wdev->iftype == NL80211_IFTYPE_MONITOR) {
978 struct ieee80211_channel *ch = wdev->preset_chandef.chan;
979
980 cmd.sniffer_cfg.mode = cpu_to_le32(WMI_SNIFFER_ON);
981 if (ch)
982 cmd.sniffer_cfg.channel = ch->hw_value - 1;
983 cmd.sniffer_cfg.phy_info_mode =
984 cpu_to_le32(ndev->type == ARPHRD_IEEE80211_RADIOTAP);
985 cmd.sniffer_cfg.phy_support =
986 cpu_to_le32((wil->monitor_flags & MONITOR_FLAG_CONTROL)
987 ? WMI_SNIFFER_CP : WMI_SNIFFER_DP);
504937d4
KE		 988 } else {
989 /* Initialize offload (in non-sniffer mode).
990 * Linux IP stack always calculates IP checksum
991 * HW always calculate TCP/UDP checksum
992 */
993 cmd.l3_l4_ctrl |= (1 << L3_L4_CTRL_TCPIP_CHECKSUM_EN_POS);
47e19af9
VK		 994 }
995 /* typical time for secure PCP is 840ms */
996 rc = wmi_call(wil, WMI_CFG_RX_CHAIN_CMDID, &cmd, sizeof(cmd),
997 WMI_CFG_RX_CHAIN_DONE_EVENTID, &evt, sizeof(evt), 2000);
998 if (rc)
999 return rc;
1000
1001 vring->hwtail = le32_to_cpu(evt.evt.rx_ring_tail_ptr);
1002
7743882d 1003 wil_dbg_misc(wil, "Rx init: status %d tail 0x%08x\n",
47e19af9
VK		 1004 le32_to_cpu(evt.evt.status), vring->hwtail);
1005
1006 if (le32_to_cpu(evt.evt.status) != WMI_CFG_RX_CHAIN_SUCCESS)
1007 rc = -EINVAL;
1008
1009 return rc;
1010}
1011
1a2780e0
VK		 1012int wmi_get_temperature(struct wil6210_priv *wil, u32 *t_m, u32 *t_r)
1013{
1014 int rc;
1015 struct wmi_temp_sense_cmd cmd = {
1016 .measure_marlon_m_en = cpu_to_le32(!!t_m),
1017 .measure_marlon_r_en = cpu_to_le32(!!t_r),
1018 };
1019 struct {
1020 struct wil6210_mbox_hdr_wmi wmi;
1021 struct wmi_temp_sense_done_event evt;
1022 } __packed reply;
1023
1024 rc = wmi_call(wil, WMI_TEMP_SENSE_CMDID, &cmd, sizeof(cmd),
1025 WMI_TEMP_SENSE_DONE_EVENTID, &reply, sizeof(reply), 100);
1026 if (rc)
1027 return rc;
1028
1029 if (t_m)
1030 *t_m = le32_to_cpu(reply.evt.marlon_m_t1000);
1031 if (t_r)
1032 *t_r = le32_to_cpu(reply.evt.marlon_r_t1000);
1033
1034 return 0;
1035}
1036
2be7d22f
VK		 1037void wmi_event_flush(struct wil6210_priv *wil)
1038{
1039 struct pending_wmi_event *evt, *t;
1040
7743882d 1041 wil_dbg_wmi(wil, "%s()\n", __func__);
2be7d22f
VK		 1042
1043 list_for_each_entry_safe(evt, t, &wil->pending_wmi_ev, list) {
1044 list_del(&evt->list);
1045 kfree(evt);
1046 }
1047}
1048
1049static bool wmi_evt_call_handler(struct wil6210_priv *wil, int id,
1050 void *d, int len)
1051{
1052 uint i;
1053
1054 for (i = 0; i < ARRAY_SIZE(wmi_evt_handlers); i++) {
1055 if (wmi_evt_handlers[i].eventid == id) {
1056 wmi_evt_handlers[i].handler(wil, id, d, len);
1057 return true;
1058 }
1059 }
1060
1061 return false;
1062}
1063
1064static void wmi_event_handle(struct wil6210_priv *wil,
1065 struct wil6210_mbox_hdr *hdr)
1066{
1067 u16 len = le16_to_cpu(hdr->len);
1068
1069 if ((hdr->type == WIL_MBOX_HDR_TYPE_WMI) &&
1070 (len >= sizeof(struct wil6210_mbox_hdr_wmi))) {
1071 struct wil6210_mbox_hdr_wmi *wmi = (void *)(&hdr[1]);
1072 void *evt_data = (void *)(&wmi[1]);
1073 u16 id = le16_to_cpu(wmi->id);
1074 /* check if someone waits for this event */
1075 if (wil->reply_id && wil->reply_id == id) {
1076 if (wil->reply_buf) {
1077 memcpy(wil->reply_buf, wmi,
1078 min(len, wil->reply_size));
1079 } else {
1080 wmi_evt_call_handler(wil, id, evt_data,
1081 len - sizeof(*wmi));
1082 }
7743882d 1083 wil_dbg_wmi(wil, "Complete WMI 0x%04x\n", id);
2be7d22f
VK		 1084 complete(&wil->wmi_ready);
1085 return;
1086 }
1087 /* unsolicited event */
1088 /* search for handler */
1089 if (!wmi_evt_call_handler(wil, id, evt_data,
1090 len - sizeof(*wmi))) {
1091 wil_err(wil, "Unhandled event 0x%04x\n", id);
1092 }
1093 } else {
1094 wil_err(wil, "Unknown event type\n");
1095 print_hex_dump(KERN_ERR, "evt?? ", DUMP_PREFIX_OFFSET, 16, 1,
1096 hdr, sizeof(*hdr) + len, true);
1097 }
1098}
1099
1100/*
1101 * Retrieve next WMI event from the pending list
1102 */
1103static struct list_head *next_wmi_ev(struct wil6210_priv *wil)
1104{
1105 ulong flags;
1106 struct list_head *ret = NULL;
1107
1108 spin_lock_irqsave(&wil->wmi_ev_lock, flags);
1109
1110 if (!list_empty(&wil->pending_wmi_ev)) {
1111 ret = wil->pending_wmi_ev.next;
1112 list_del(ret);
1113 }
1114
1115 spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
1116
1117 return ret;
1118}
1119
1120/*
1121 * Handler for the WMI events
1122 */
1123void wmi_event_worker(struct work_struct *work)
1124{
1125 struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
1126 wmi_event_worker);
1127 struct pending_wmi_event *evt;
1128 struct list_head *lh;
1129
1130 while ((lh = next_wmi_ev(wil)) != NULL) {
1131 evt = list_entry(lh, struct pending_wmi_event, list);
1132 wmi_event_handle(wil, &evt->event.hdr);
1133 kfree(evt);
1134 }
1135}
Linux kernel - Deliverables
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