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wil6210: Never delete Rx chain with firmware
[linux-2.6.git] / drivers / net / wireless / ath / wil6210 / wmi.c
blob0b70e17cd1fb3c195d2c8e024acca7e6c499394c
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
17 #include <linux/pci.h>
18 #include <linux/io.h>
19 #include <linux/list.h>
20 #include <linux/etherdevice.h>
21 #include <linux/if_arp.h>
22
23 #include "wil6210.h"
24 #include "txrx.h"
25 #include "wmi.h"
26
27 /**
28 * WMI event receiving - theory of operations
29 *
30 * When firmware about to report WMI event, it fills memory area
31 * in the mailbox and raises misc. IRQ. Thread interrupt handler invoked for
32 * the misc IRQ, function @wmi_recv_cmd called by thread IRQ handler.
33 *
34 * @wmi_recv_cmd reads event, allocates memory chunk and attaches it to the
35 * event list @wil->pending_wmi_ev. Then, work queue @wil->wmi_wq wakes up
36 * and handles events within the @wmi_event_worker. Every event get detached
37 * from list, processed and deleted.
38 *
39 * Purpose for this mechanism is to release IRQ thread; otherwise,
40 * if WMI event handling involves another WMI command flow, this 2-nd flow
41 * won't be completed because of blocked IRQ thread.
42 */
43
44 /**
45 * Addressing - theory of operations
46 *
47 * There are several buses present on the WIL6210 card.
48 * Same memory areas are visible at different address on
49 * the different busses. There are 3 main bus masters:
50 * - MAC CPU (ucode)
51 * - User CPU (firmware)
52 * - AHB (host)
53 *
54 * On the PCI bus, there is one BAR (BAR0) of 2Mb size, exposing
55 * AHB addresses starting from 0x880000
56 *
57 * Internally, firmware uses addresses that allows faster access but
58 * are invisible from the host. To read from these addresses, alternative
59 * AHB address must be used.
60 *
61 * Memory mapping
62 * Linker address PCI/Host address
63 * 0x880000 .. 0xa80000 2Mb BAR0
64 * 0x800000 .. 0x807000 0x900000 .. 0x907000 28k DCCM
65 * 0x840000 .. 0x857000 0x908000 .. 0x91f000 92k PERIPH
66 */
67
68 /**
69 * @fw_mapping provides memory remapping table
70 */
71 static const struct {
72 u32 from; /* linker address - from, inclusive */
73 u32 to; /* linker address - to, exclusive */
74 u32 host; /* PCI/Host address - BAR0 + 0x880000 */
75 } fw_mapping[] = {
76 {0x000000, 0x040000, 0x8c0000}, /* FW code RAM 256k */
77 {0x800000, 0x808000, 0x900000}, /* FW data RAM 32k */
78 {0x840000, 0x860000, 0x908000}, /* peripheral data RAM 128k/96k used */
79 {0x880000, 0x88a000, 0x880000}, /* various RGF */
80 {0x8c0000, 0x932000, 0x8c0000}, /* trivial mapping for upper area */
81 /*
82 * 920000..930000 ucode code RAM
83 * 930000..932000 ucode data RAM
84 */
85 };
86
87 /**
88 * return AHB address for given firmware/ucode internal (linker) address
89 * @x - internal address
90 * If address have no valid AHB mapping, return 0
91 */
92 static u32 wmi_addr_remap(u32 x)
93 {
94 uint i;
95
96 for (i = 0; i < ARRAY_SIZE(fw_mapping); i++) {
97 if ((x >= fw_mapping[i].from) && (x < fw_mapping[i].to))
98 return x + fw_mapping[i].host - fw_mapping[i].from;
99 }
100
101 return 0;
102 }
103
104 /**
105 * Check address validity for WMI buffer; remap if needed
106 * @ptr - internal (linker) fw/ucode address
107 *
108 * Valid buffer should be DWORD aligned
109 *
110 * return address for accessing buffer from the host;
111 * if buffer is not valid, return NULL.
112 */
113 void __iomem *wmi_buffer(struct wil6210_priv *wil, __le32 ptr_)
114 {
115 u32 off;
116 u32 ptr = le32_to_cpu(ptr_);
117
118 if (ptr % 4)
119 return NULL;
120
121 ptr = wmi_addr_remap(ptr);
122 if (ptr < WIL6210_FW_HOST_OFF)
123 return NULL;
124
125 off = HOSTADDR(ptr);
126 if (off > WIL6210_MEM_SIZE - 4)
127 return NULL;
128
129 return wil->csr + off;
130 }
131
132 /**
133 * Check address validity
134 */
135 void __iomem *wmi_addr(struct wil6210_priv *wil, u32 ptr)
136 {
137 u32 off;
138
139 if (ptr % 4)
140 return NULL;
141
142 if (ptr < WIL6210_FW_HOST_OFF)
143 return NULL;
144
145 off = HOSTADDR(ptr);
146 if (off > WIL6210_MEM_SIZE - 4)
147 return NULL;
148
149 return wil->csr + off;
150 }
151
152 int wmi_read_hdr(struct wil6210_priv *wil, __le32 ptr,
153 struct wil6210_mbox_hdr *hdr)
154 {
155 void __iomem *src = wmi_buffer(wil, ptr);
156 if (!src)
157 return -EINVAL;
158
159 wil_memcpy_fromio_32(hdr, src, sizeof(*hdr));
160
161 return 0;
162 }
163
164 static int __wmi_send(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len)
165 {
166 struct {
167 struct wil6210_mbox_hdr hdr;
168 struct wil6210_mbox_hdr_wmi wmi;
169 } __packed cmd = {
170 .hdr = {
171 .type = WIL_MBOX_HDR_TYPE_WMI,
172 .flags = 0,
173 .len = cpu_to_le16(sizeof(cmd.wmi) + len),
174 },
175 .wmi = {
176 .id = cpu_to_le16(cmdid),
177 .info1 = 0,
178 },
179 };
180 struct wil6210_mbox_ring *r = &wil->mbox_ctl.tx;
181 struct wil6210_mbox_ring_desc d_head;
182 u32 next_head;
183 void __iomem *dst;
184 void __iomem *head = wmi_addr(wil, r->head);
185 uint retry;
186
187 if (sizeof(cmd) + len > r->entry_size) {
188 wil_err(wil, "WMI size too large: %d bytes, max is %d\n",
189 (int)(sizeof(cmd) + len), r->entry_size);
190 return -ERANGE;
191 }
192
193 might_sleep();
194
195 if (!test_bit(wil_status_fwready, &wil->status)) {
196 wil_err(wil, "FW not ready\n");
197 return -EAGAIN;
198 }
199
200 if (!head) {
201 wil_err(wil, "WMI head is garbage: 0x%08x\n", r->head);
202 return -EINVAL;
203 }
204 /* read Tx head till it is not busy */
205 for (retry = 5; retry > 0; retry--) {
206 wil_memcpy_fromio_32(&d_head, head, sizeof(d_head));
207 if (d_head.sync == 0)
208 break;
209 msleep(20);
210 }
211 if (d_head.sync != 0) {
212 wil_err(wil, "WMI head busy\n");
213 return -EBUSY;
214 }
215 /* next head */
216 next_head = r->base + ((r->head - r->base + sizeof(d_head)) % r->size);
217 wil_dbg_wmi(wil, "Head 0x%08x -> 0x%08x\n", r->head, next_head);
218 /* wait till FW finish with previous command */
219 for (retry = 5; retry > 0; retry--) {
220 r->tail = ioread32(wil->csr + HOST_MBOX +
221 offsetof(struct wil6210_mbox_ctl, tx.tail));
222 if (next_head != r->tail)
223 break;
224 msleep(20);
225 }
226 if (next_head == r->tail) {
227 wil_err(wil, "WMI ring full\n");
228 return -EBUSY;
229 }
230 dst = wmi_buffer(wil, d_head.addr);
231 if (!dst) {
232 wil_err(wil, "invalid WMI buffer: 0x%08x\n",
233 le32_to_cpu(d_head.addr));
234 return -EINVAL;
235 }
236 cmd.hdr.seq = cpu_to_le16(++wil->wmi_seq);
237 /* set command */
238 wil_dbg_wmi(wil, "WMI command 0x%04x [%d]\n", cmdid, len);
239 wil_hex_dump_wmi("Cmd ", DUMP_PREFIX_OFFSET, 16, 1, &cmd,
240 sizeof(cmd), true);
241 wil_hex_dump_wmi("cmd ", DUMP_PREFIX_OFFSET, 16, 1, buf,
242 len, true);
243 wil_memcpy_toio_32(dst, &cmd, sizeof(cmd));
244 wil_memcpy_toio_32(dst + sizeof(cmd), buf, len);
245 /* mark entry as full */
246 iowrite32(1, wil->csr + HOSTADDR(r->head) +
247 offsetof(struct wil6210_mbox_ring_desc, sync));
248 /* advance next ptr */
249 iowrite32(r->head = next_head, wil->csr + HOST_MBOX +
250 offsetof(struct wil6210_mbox_ctl, tx.head));
251
252 /* interrupt to FW */
253 iowrite32(SW_INT_MBOX, wil->csr + HOST_SW_INT);
254
255 return 0;
256 }
257
258 int wmi_send(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len)
259 {
260 int rc;
261
262 mutex_lock(&wil->wmi_mutex);
263 rc = __wmi_send(wil, cmdid, buf, len);
264 mutex_unlock(&wil->wmi_mutex);
265
266 return rc;
267 }
268
269 /*=== Event handlers ===*/
270 static void wmi_evt_ready(struct wil6210_priv *wil, int id, void *d, int len)
271 {
272 struct net_device *ndev = wil_to_ndev(wil);
273 struct wireless_dev *wdev = wil->wdev;
274 struct wmi_ready_event *evt = d;
275 u32 ver = le32_to_cpu(evt->sw_version);
276
277 wil_dbg_wmi(wil, "FW ver. %d; MAC %pM\n", ver, evt->mac);
278
279 if (!is_valid_ether_addr(ndev->dev_addr)) {
280 memcpy(ndev->dev_addr, evt->mac, ETH_ALEN);
281 memcpy(ndev->perm_addr, evt->mac, ETH_ALEN);
282 }
283 snprintf(wdev->wiphy->fw_version, sizeof(wdev->wiphy->fw_version),
284 "%d", ver);
285 }
286
287 static void wmi_evt_fw_ready(struct wil6210_priv *wil, int id, void *d,
288 int len)
289 {
290 wil_dbg_wmi(wil, "WMI: FW ready\n");
291
292 set_bit(wil_status_fwready, &wil->status);
293 /* reuse wmi_ready for the firmware ready indication */
294 complete(&wil->wmi_ready);
295 }
296
297 static void wmi_evt_rx_mgmt(struct wil6210_priv *wil, int id, void *d, int len)
298 {
299 struct wmi_rx_mgmt_packet_event *data = d;
300 struct wiphy *wiphy = wil_to_wiphy(wil);
301 struct ieee80211_mgmt *rx_mgmt_frame =
302 (struct ieee80211_mgmt *)data->payload;
303 int ch_no = data->info.channel+1;
304 u32 freq = ieee80211_channel_to_frequency(ch_no,
305 IEEE80211_BAND_60GHZ);
306 struct ieee80211_channel *channel = ieee80211_get_channel(wiphy, freq);
307 /* TODO convert LE to CPU */
308 s32 signal = 0; /* TODO */
309 __le16 fc = rx_mgmt_frame->frame_control;
310 u32 d_len = le32_to_cpu(data->info.len);
311 u16 d_status = le16_to_cpu(data->info.status);
312
313 wil_dbg_wmi(wil, "MGMT: channel %d MCS %d SNR %d\n",
314 data->info.channel, data->info.mcs, data->info.snr);
315 wil_dbg_wmi(wil, "status 0x%04x len %d stype %04x\n", d_status, d_len,
316 le16_to_cpu(data->info.stype));
317 wil_dbg_wmi(wil, "qid %d mid %d cid %d\n",
318 data->info.qid, data->info.mid, data->info.cid);
319
320 if (!channel) {
321 wil_err(wil, "Frame on unsupported channel\n");
322 return;
323 }
324
325 if (ieee80211_is_beacon(fc) || ieee80211_is_probe_resp(fc)) {
326 struct cfg80211_bss *bss;
327 u64 tsf = le64_to_cpu(rx_mgmt_frame->u.beacon.timestamp);
328 u16 cap = le16_to_cpu(rx_mgmt_frame->u.beacon.capab_info);
329 u16 bi = le16_to_cpu(rx_mgmt_frame->u.beacon.beacon_int);
330 const u8 *ie_buf = rx_mgmt_frame->u.beacon.variable;
331 size_t ie_len = d_len - offsetof(struct ieee80211_mgmt,
332 u.beacon.variable);
333 wil_dbg_wmi(wil, "Capability info : 0x%04x\n", cap);
334
335 bss = cfg80211_inform_bss(wiphy, channel, rx_mgmt_frame->bssid,
336 tsf, cap, bi, ie_buf, ie_len,
337 signal, GFP_KERNEL);
338 if (bss) {
339 wil_dbg_wmi(wil, "Added BSS %pM\n",
340 rx_mgmt_frame->bssid);
341 cfg80211_put_bss(bss);
342 } else {
343 wil_err(wil, "cfg80211_inform_bss() failed\n");
344 }
345 }
346 }
347
348 static void wmi_evt_scan_complete(struct wil6210_priv *wil, int id,
349 void *d, int len)
350 {
351 if (wil->scan_request) {
352 struct wmi_scan_complete_event *data = d;
353 bool aborted = (data->status != 0);
354
355 wil_dbg_wmi(wil, "SCAN_COMPLETE(0x%08x)\n", data->status);
356 cfg80211_scan_done(wil->scan_request, aborted);
357 wil->scan_request = NULL;
358 } else {
359 wil_err(wil, "SCAN_COMPLETE while not scanning\n");
360 }
361 }
362
363 static void wmi_evt_connect(struct wil6210_priv *wil, int id, void *d, int len)
364 {
365 struct net_device *ndev = wil_to_ndev(wil);
366 struct wireless_dev *wdev = wil->wdev;
367 struct wmi_connect_event *evt = d;
368 int ch; /* channel number */
369 struct station_info sinfo;
370 u8 *assoc_req_ie, *assoc_resp_ie;
371 size_t assoc_req_ielen, assoc_resp_ielen;
372 /* capinfo(u16) + listen_interval(u16) + IEs */
373 const size_t assoc_req_ie_offset = sizeof(u16) * 2;
374 /* capinfo(u16) + status_code(u16) + associd(u16) + IEs */
375 const size_t assoc_resp_ie_offset = sizeof(u16) * 3;
376
377 if (len < sizeof(*evt)) {
378 wil_err(wil, "Connect event too short : %d bytes\n", len);
379 return;
380 }
381 if (len != sizeof(*evt) + evt->beacon_ie_len + evt->assoc_req_len +
382 evt->assoc_resp_len) {
383 wil_err(wil,
384 "Connect event corrupted : %d != %d + %d + %d + %d\n",
385 len, (int)sizeof(*evt), evt->beacon_ie_len,
386 evt->assoc_req_len, evt->assoc_resp_len);
387 return;
388 }
389 ch = evt->channel + 1;
390 wil_dbg_wmi(wil, "Connect %pM channel [%d] cid %d\n",
391 evt->bssid, ch, evt->cid);
392 wil_hex_dump_wmi("connect AI : ", DUMP_PREFIX_OFFSET, 16, 1,
393 evt->assoc_info, len - sizeof(*evt), true);
394
395 /* figure out IE's */
396 assoc_req_ie = &evt->assoc_info[evt->beacon_ie_len +
397 assoc_req_ie_offset];
398 assoc_req_ielen = evt->assoc_req_len - assoc_req_ie_offset;
399 if (evt->assoc_req_len <= assoc_req_ie_offset) {
400 assoc_req_ie = NULL;
401 assoc_req_ielen = 0;
402 }
403
404 assoc_resp_ie = &evt->assoc_info[evt->beacon_ie_len +
405 evt->assoc_req_len +
406 assoc_resp_ie_offset];
407 assoc_resp_ielen = evt->assoc_resp_len - assoc_resp_ie_offset;
408 if (evt->assoc_resp_len <= assoc_resp_ie_offset) {
409 assoc_resp_ie = NULL;
410 assoc_resp_ielen = 0;
411 }
412
413 if ((wdev->iftype == NL80211_IFTYPE_STATION) ||
414 (wdev->iftype == NL80211_IFTYPE_P2P_CLIENT)) {
415 if (wdev->sme_state != CFG80211_SME_CONNECTING) {
416 wil_err(wil, "Not in connecting state\n");
417 return;
418 }
419 del_timer_sync(&wil->connect_timer);
420 cfg80211_connect_result(ndev, evt->bssid,
421 assoc_req_ie, assoc_req_ielen,
422 assoc_resp_ie, assoc_resp_ielen,
423 WLAN_STATUS_SUCCESS, GFP_KERNEL);
424
425 } else if ((wdev->iftype == NL80211_IFTYPE_AP) ||
426 (wdev->iftype == NL80211_IFTYPE_P2P_GO)) {
427 memset(&sinfo, 0, sizeof(sinfo));
428
429 sinfo.generation = wil->sinfo_gen++;
430
431 if (assoc_req_ie) {
432 sinfo.assoc_req_ies = assoc_req_ie;
433 sinfo.assoc_req_ies_len = assoc_req_ielen;
434 sinfo.filled |= STATION_INFO_ASSOC_REQ_IES;
435 }
436
437 cfg80211_new_sta(ndev, evt->bssid, &sinfo, GFP_KERNEL);
438 }
439 set_bit(wil_status_fwconnected, &wil->status);
440
441 /* FIXME FW can transmit only ucast frames to peer */
442 /* FIXME real ring_id instead of hard coded 0 */
443 memcpy(wil->dst_addr[0], evt->bssid, ETH_ALEN);
444
445 wil->pending_connect_cid = evt->cid;
446 queue_work(wil->wmi_wq_conn, &wil->wmi_connect_worker);
447 }
448
449 static void wmi_evt_disconnect(struct wil6210_priv *wil, int id,
450 void *d, int len)
451 {
452 struct wmi_disconnect_event *evt = d;
453
454 wil_dbg_wmi(wil, "Disconnect %pM reason %d proto %d wmi\n",
455 evt->bssid,
456 evt->protocol_reason_status, evt->disconnect_reason);
457
458 wil->sinfo_gen++;
459
460 wil6210_disconnect(wil, evt->bssid);
461 }
462
463 static void wmi_evt_notify(struct wil6210_priv *wil, int id, void *d, int len)
464 {
465 struct wmi_notify_req_done_event *evt = d;
466
467 if (len < sizeof(*evt)) {
468 wil_err(wil, "Short NOTIFY event\n");
469 return;
470 }
471
472 wil->stats.tsf = le64_to_cpu(evt->tsf);
473 wil->stats.snr = le32_to_cpu(evt->snr_val);
474 wil->stats.bf_mcs = le16_to_cpu(evt->bf_mcs);
475 wil->stats.my_rx_sector = le16_to_cpu(evt->my_rx_sector);
476 wil->stats.my_tx_sector = le16_to_cpu(evt->my_tx_sector);
477 wil->stats.peer_rx_sector = le16_to_cpu(evt->other_rx_sector);
478 wil->stats.peer_tx_sector = le16_to_cpu(evt->other_tx_sector);
479 wil_dbg_wmi(wil, "Link status, MCS %d TSF 0x%016llx\n"
480 "BF status 0x%08x SNR 0x%08x\n"
481 "Tx Tpt %d goodput %d Rx goodput %d\n"
482 "Sectors(rx:tx) my %d:%d peer %d:%d\n",
483 wil->stats.bf_mcs, wil->stats.tsf, evt->status,
484 wil->stats.snr, le32_to_cpu(evt->tx_tpt),
485 le32_to_cpu(evt->tx_goodput), le32_to_cpu(evt->rx_goodput),
486 wil->stats.my_rx_sector, wil->stats.my_tx_sector,
487 wil->stats.peer_rx_sector, wil->stats.peer_tx_sector);
488 }
489
490 /*
491 * Firmware reports EAPOL frame using WME event.
492 * Reconstruct Ethernet frame and deliver it via normal Rx
493 */
494 static void wmi_evt_eapol_rx(struct wil6210_priv *wil, int id,
495 void *d, int len)
496 {
497 struct net_device *ndev = wil_to_ndev(wil);
498 struct wmi_eapol_rx_event *evt = d;
499 u16 eapol_len = le16_to_cpu(evt->eapol_len);
500 int sz = eapol_len + ETH_HLEN;
501 struct sk_buff *skb;
502 struct ethhdr *eth;
503
504 wil_dbg_wmi(wil, "EAPOL len %d from %pM\n", eapol_len,
505 evt->src_mac);
506
507 if (eapol_len > 196) { /* TODO: revisit size limit */
508 wil_err(wil, "EAPOL too large\n");
509 return;
510 }
511
512 skb = alloc_skb(sz, GFP_KERNEL);
513 if (!skb) {
514 wil_err(wil, "Failed to allocate skb\n");
515 return;
516 }
517 eth = (struct ethhdr *)skb_put(skb, ETH_HLEN);
518 memcpy(eth->h_dest, ndev->dev_addr, ETH_ALEN);
519 memcpy(eth->h_source, evt->src_mac, ETH_ALEN);
520 eth->h_proto = cpu_to_be16(ETH_P_PAE);
521 memcpy(skb_put(skb, eapol_len), evt->eapol, eapol_len);
522 skb->protocol = eth_type_trans(skb, ndev);
523 if (likely(netif_rx_ni(skb) == NET_RX_SUCCESS)) {
524 ndev->stats.rx_packets++;
525 ndev->stats.rx_bytes += skb->len;
526 } else {
527 ndev->stats.rx_dropped++;
528 }
529 }
530
531 static const struct {
532 int eventid;
533 void (*handler)(struct wil6210_priv *wil, int eventid,
534 void *data, int data_len);
535 } wmi_evt_handlers[] = {
536 {WMI_READY_EVENTID, wmi_evt_ready},
537 {WMI_FW_READY_EVENTID, wmi_evt_fw_ready},
538 {WMI_RX_MGMT_PACKET_EVENTID, wmi_evt_rx_mgmt},
539 {WMI_SCAN_COMPLETE_EVENTID, wmi_evt_scan_complete},
540 {WMI_CONNECT_EVENTID, wmi_evt_connect},
541 {WMI_DISCONNECT_EVENTID, wmi_evt_disconnect},
542 {WMI_NOTIFY_REQ_DONE_EVENTID, wmi_evt_notify},
543 {WMI_EAPOL_RX_EVENTID, wmi_evt_eapol_rx},
544 };
545
546 /*
547 * Run in IRQ context
548 * Extract WMI command from mailbox. Queue it to the @wil->pending_wmi_ev
549 * that will be eventually handled by the @wmi_event_worker in the thread
550 * context of thread "wil6210_wmi"
551 */
552 void wmi_recv_cmd(struct wil6210_priv *wil)
553 {
554 struct wil6210_mbox_ring_desc d_tail;
555 struct wil6210_mbox_hdr hdr;
556 struct wil6210_mbox_ring *r = &wil->mbox_ctl.rx;
557 struct pending_wmi_event *evt;
558 u8 *cmd;
559 void __iomem *src;
560 ulong flags;
561
562 for (;;) {
563 u16 len;
564
565 r->head = ioread32(wil->csr + HOST_MBOX +
566 offsetof(struct wil6210_mbox_ctl, rx.head));
567 if (r->tail == r->head)
568 return;
569
570 /* read cmd from tail */
571 wil_memcpy_fromio_32(&d_tail, wil->csr + HOSTADDR(r->tail),
572 sizeof(struct wil6210_mbox_ring_desc));
573 if (d_tail.sync == 0) {
574 wil_err(wil, "Mbox evt not owned by FW?\n");
575 return;
576 }
577
578 if (0 != wmi_read_hdr(wil, d_tail.addr, &hdr)) {
579 wil_err(wil, "Mbox evt at 0x%08x?\n",
580 le32_to_cpu(d_tail.addr));
581 return;
582 }
583
584 len = le16_to_cpu(hdr.len);
585 src = wmi_buffer(wil, d_tail.addr) +
586 sizeof(struct wil6210_mbox_hdr);
587 evt = kmalloc(ALIGN(offsetof(struct pending_wmi_event,
588 event.wmi) + len, 4),
589 GFP_KERNEL);
590 if (!evt) {
591 wil_err(wil, "kmalloc for WMI event (%d) failed\n",
592 len);
593 return;
594 }
595 evt->event.hdr = hdr;
596 cmd = (void *)&evt->event.wmi;
597 wil_memcpy_fromio_32(cmd, src, len);
598 /* mark entry as empty */
599 iowrite32(0, wil->csr + HOSTADDR(r->tail) +
600 offsetof(struct wil6210_mbox_ring_desc, sync));
601 /* indicate */
602 wil_dbg_wmi(wil, "Mbox evt %04x %04x %04x %02x\n",
603 le16_to_cpu(hdr.seq), len, le16_to_cpu(hdr.type),
604 hdr.flags);
605 if ((hdr.type == WIL_MBOX_HDR_TYPE_WMI) &&
606 (len >= sizeof(struct wil6210_mbox_hdr_wmi))) {
607 wil_dbg_wmi(wil, "WMI event 0x%04x\n",
608 evt->event.wmi.id);
609 }
610 wil_hex_dump_wmi("evt ", DUMP_PREFIX_OFFSET, 16, 1,
611 &evt->event.hdr, sizeof(hdr) + len, true);
612
613 /* advance tail */
614 r->tail = r->base + ((r->tail - r->base +
615 sizeof(struct wil6210_mbox_ring_desc)) % r->size);
616 iowrite32(r->tail, wil->csr + HOST_MBOX +
617 offsetof(struct wil6210_mbox_ctl, rx.tail));
618
619 /* add to the pending list */
620 spin_lock_irqsave(&wil->wmi_ev_lock, flags);
621 list_add_tail(&evt->list, &wil->pending_wmi_ev);
622 spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
623 {
624 int q = queue_work(wil->wmi_wq,
625 &wil->wmi_event_worker);
626 wil_dbg_wmi(wil, "queue_work -> %d\n", q);
627 }
628 }
629 }
630
631 int wmi_call(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len,
632 u16 reply_id, void *reply, u8 reply_size, int to_msec)
633 {
634 int rc;
635 int remain;
636
637 mutex_lock(&wil->wmi_mutex);
638
639 rc = __wmi_send(wil, cmdid, buf, len);
640 if (rc)
641 goto out;
642
643 wil->reply_id = reply_id;
644 wil->reply_buf = reply;
645 wil->reply_size = reply_size;
646 remain = wait_for_completion_timeout(&wil->wmi_ready,
647 msecs_to_jiffies(to_msec));
648 if (0 == remain) {
649 wil_err(wil, "wmi_call(0x%04x->0x%04x) timeout %d msec\n",
650 cmdid, reply_id, to_msec);
651 rc = -ETIME;
652 } else {
653 wil_dbg_wmi(wil,
654 "wmi_call(0x%04x->0x%04x) completed in %d msec\n",
655 cmdid, reply_id,
656 to_msec - jiffies_to_msecs(remain));
657 }
658 wil->reply_id = 0;
659 wil->reply_buf = NULL;
660 wil->reply_size = 0;
661 out:
662 mutex_unlock(&wil->wmi_mutex);
663
664 return rc;
665 }
666
667 int wmi_echo(struct wil6210_priv *wil)
668 {
669 struct wmi_echo_cmd cmd = {
670 .value = cpu_to_le32(0x12345678),
671 };
672
673 return wmi_call(wil, WMI_ECHO_CMDID, &cmd, sizeof(cmd),
674 WMI_ECHO_RSP_EVENTID, NULL, 0, 20);
675 }
676
677 int wmi_set_mac_address(struct wil6210_priv *wil, void *addr)
678 {
679 struct wmi_set_mac_address_cmd cmd;
680
681 memcpy(cmd.mac, addr, ETH_ALEN);
682
683 wil_dbg_wmi(wil, "Set MAC %pM\n", addr);
684
685 return wmi_send(wil, WMI_SET_MAC_ADDRESS_CMDID, &cmd, sizeof(cmd));
686 }
687
688 int wmi_set_bcon(struct wil6210_priv *wil, int bi, u8 wmi_nettype)
689 {
690 struct wmi_bcon_ctrl_cmd cmd = {
691 .bcon_interval = cpu_to_le16(bi),
692 .network_type = wmi_nettype,
693 .disable_sec_offload = 1,
694 };
695
696 if (!wil->secure_pcp)
697 cmd.disable_sec = 1;
698
699 return wmi_send(wil, WMI_BCON_CTRL_CMDID, &cmd, sizeof(cmd));
700 }
701
702 int wmi_set_ssid(struct wil6210_priv *wil, u8 ssid_len, const void *ssid)
703 {
704 struct wmi_set_ssid_cmd cmd = {
705 .ssid_len = cpu_to_le32(ssid_len),
706 };
707
708 if (ssid_len > sizeof(cmd.ssid))
709 return -EINVAL;
710
711 memcpy(cmd.ssid, ssid, ssid_len);
712
713 return wmi_send(wil, WMI_SET_SSID_CMDID, &cmd, sizeof(cmd));
714 }
715
716 int wmi_get_ssid(struct wil6210_priv *wil, u8 *ssid_len, void *ssid)
717 {
718 int rc;
719 struct {
720 struct wil6210_mbox_hdr_wmi wmi;
721 struct wmi_set_ssid_cmd cmd;
722 } __packed reply;
723 int len; /* reply.cmd.ssid_len in CPU order */
724
725 rc = wmi_call(wil, WMI_GET_SSID_CMDID, NULL, 0, WMI_GET_SSID_EVENTID,
726 &reply, sizeof(reply), 20);
727 if (rc)
728 return rc;
729
730 len = le32_to_cpu(reply.cmd.ssid_len);
731 if (len > sizeof(reply.cmd.ssid))
732 return -EINVAL;
733
734 *ssid_len = len;
735 memcpy(ssid, reply.cmd.ssid, len);
736
737 return 0;
738 }
739
740 int wmi_set_channel(struct wil6210_priv *wil, int channel)
741 {
742 struct wmi_set_pcp_channel_cmd cmd = {
743 .channel = channel - 1,
744 };
745
746 return wmi_send(wil, WMI_SET_PCP_CHANNEL_CMDID, &cmd, sizeof(cmd));
747 }
748
749 int wmi_get_channel(struct wil6210_priv *wil, int *channel)
750 {
751 int rc;
752 struct {
753 struct wil6210_mbox_hdr_wmi wmi;
754 struct wmi_set_pcp_channel_cmd cmd;
755 } __packed reply;
756
757 rc = wmi_call(wil, WMI_GET_PCP_CHANNEL_CMDID, NULL, 0,
758 WMI_GET_PCP_CHANNEL_EVENTID, &reply, sizeof(reply), 20);
759 if (rc)
760 return rc;
761
762 if (reply.cmd.channel > 3)
763 return -EINVAL;
764
765 *channel = reply.cmd.channel + 1;
766
767 return 0;
768 }
769
770 int wmi_tx_eapol(struct wil6210_priv *wil, struct sk_buff *skb)
771 {
772 struct wmi_eapol_tx_cmd *cmd;
773 struct ethhdr *eth;
774 u16 eapol_len = skb->len - ETH_HLEN;
775 void *eapol = skb->data + ETH_HLEN;
776 uint i;
777 int rc;
778
779 skb_set_mac_header(skb, 0);
780 eth = eth_hdr(skb);
781 wil_dbg_wmi(wil, "EAPOL %d bytes to %pM\n", eapol_len, eth->h_dest);
782 for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
783 if (memcmp(wil->dst_addr[i], eth->h_dest, ETH_ALEN) == 0)
784 goto found_dest;
785 }
786
787 return -EINVAL;
788
789 found_dest:
790 /* find out eapol data & len */
791 cmd = kzalloc(sizeof(*cmd) + eapol_len, GFP_KERNEL);
792 if (!cmd)
793 return -EINVAL;
794
795 memcpy(cmd->dst_mac, eth->h_dest, ETH_ALEN);
796 cmd->eapol_len = cpu_to_le16(eapol_len);
797 memcpy(cmd->eapol, eapol, eapol_len);
798 rc = wmi_send(wil, WMI_EAPOL_TX_CMDID, cmd, sizeof(*cmd) + eapol_len);
799 kfree(cmd);
800
801 return rc;
802 }
803
804 int wmi_del_cipher_key(struct wil6210_priv *wil, u8 key_index,
805 const void *mac_addr)
806 {
807 struct wmi_delete_cipher_key_cmd cmd = {
808 .key_index = key_index,
809 };
810
811 if (mac_addr)
812 memcpy(cmd.mac, mac_addr, WMI_MAC_LEN);
813
814 return wmi_send(wil, WMI_DELETE_CIPHER_KEY_CMDID, &cmd, sizeof(cmd));
815 }
816
817 int wmi_add_cipher_key(struct wil6210_priv *wil, u8 key_index,
818 const void *mac_addr, int key_len, const void *key)
819 {
820 struct wmi_add_cipher_key_cmd cmd = {
821 .key_index = key_index,
822 .key_usage = WMI_KEY_USE_PAIRWISE,
823 .key_len = key_len,
824 };
825
826 if (!key || (key_len > sizeof(cmd.key)))
827 return -EINVAL;
828
829 memcpy(cmd.key, key, key_len);
830 if (mac_addr)
831 memcpy(cmd.mac, mac_addr, WMI_MAC_LEN);
832
833 return wmi_send(wil, WMI_ADD_CIPHER_KEY_CMDID, &cmd, sizeof(cmd));
834 }
835
836 int wmi_set_ie(struct wil6210_priv *wil, u8 type, u16 ie_len, const void *ie)
837 {
838 int rc;
839 u16 len = sizeof(struct wmi_set_appie_cmd) + ie_len;
840 struct wmi_set_appie_cmd *cmd = kzalloc(len, GFP_KERNEL);
841 if (!cmd) {
842 wil_err(wil, "kmalloc(%d) failed\n", len);
843 return -ENOMEM;
844 }
845
846 cmd->mgmt_frm_type = type;
847 /* BUG: FW API define ieLen as u8. Will fix FW */
848 cmd->ie_len = cpu_to_le16(ie_len);
849 memcpy(cmd->ie_info, ie, ie_len);
850 rc = wmi_send(wil, WMI_SET_APPIE_CMDID, &cmd, len);
851 kfree(cmd);
852
853 return rc;
854 }
855
856 int wmi_rx_chain_add(struct wil6210_priv *wil, struct vring *vring)
857 {
858 struct wireless_dev *wdev = wil->wdev;
859 struct net_device *ndev = wil_to_ndev(wil);
860 struct wmi_cfg_rx_chain_cmd cmd = {
861 .action = WMI_RX_CHAIN_ADD,
862 .rx_sw_ring = {
863 .max_mpdu_size = cpu_to_le16(RX_BUF_LEN),
864 .ring_mem_base = cpu_to_le64(vring->pa),
865 .ring_size = cpu_to_le16(vring->size),
866 },
867 .mid = 0, /* TODO - what is it? */
868 .decap_trans_type = WMI_DECAP_TYPE_802_3,
869 };
870 struct {
871 struct wil6210_mbox_hdr_wmi wmi;
872 struct wmi_cfg_rx_chain_done_event evt;
873 } __packed evt;
874 int rc;
875
876 if (wdev->iftype == NL80211_IFTYPE_MONITOR) {
877 struct ieee80211_channel *ch = wdev->preset_chandef.chan;
878
879 cmd.sniffer_cfg.mode = cpu_to_le32(WMI_SNIFFER_ON);
880 if (ch)
881 cmd.sniffer_cfg.channel = ch->hw_value - 1;
882 cmd.sniffer_cfg.phy_info_mode =
883 cpu_to_le32(ndev->type == ARPHRD_IEEE80211_RADIOTAP);
884 cmd.sniffer_cfg.phy_support =
885 cpu_to_le32((wil->monitor_flags & MONITOR_FLAG_CONTROL)
886 ? WMI_SNIFFER_CP : WMI_SNIFFER_DP);
887 }
888 /* typical time for secure PCP is 840ms */
889 rc = wmi_call(wil, WMI_CFG_RX_CHAIN_CMDID, &cmd, sizeof(cmd),
890 WMI_CFG_RX_CHAIN_DONE_EVENTID, &evt, sizeof(evt), 2000);
891 if (rc)
892 return rc;
893
894 vring->hwtail = le32_to_cpu(evt.evt.rx_ring_tail_ptr);
895
896 wil_dbg_misc(wil, "Rx init: status %d tail 0x%08x\n",
897 le32_to_cpu(evt.evt.status), vring->hwtail);
898
899 if (le32_to_cpu(evt.evt.status) != WMI_CFG_RX_CHAIN_SUCCESS)
900 rc = -EINVAL;
901
902 return rc;
903 }
904
905 void wmi_event_flush(struct wil6210_priv *wil)
906 {
907 struct pending_wmi_event *evt, *t;
908
909 wil_dbg_wmi(wil, "%s()\n", __func__);
910
911 list_for_each_entry_safe(evt, t, &wil->pending_wmi_ev, list) {
912 list_del(&evt->list);
913 kfree(evt);
914 }
915 }
916
917 static bool wmi_evt_call_handler(struct wil6210_priv *wil, int id,
918 void *d, int len)
919 {
920 uint i;
921
922 for (i = 0; i < ARRAY_SIZE(wmi_evt_handlers); i++) {
923 if (wmi_evt_handlers[i].eventid == id) {
924 wmi_evt_handlers[i].handler(wil, id, d, len);
925 return true;
926 }
927 }
928
929 return false;
930 }
931
932 static void wmi_event_handle(struct wil6210_priv *wil,
933 struct wil6210_mbox_hdr *hdr)
934 {
935 u16 len = le16_to_cpu(hdr->len);
936
937 if ((hdr->type == WIL_MBOX_HDR_TYPE_WMI) &&
938 (len >= sizeof(struct wil6210_mbox_hdr_wmi))) {
939 struct wil6210_mbox_hdr_wmi *wmi = (void *)(&hdr[1]);
940 void *evt_data = (void *)(&wmi[1]);
941 u16 id = le16_to_cpu(wmi->id);
942 /* check if someone waits for this event */
943 if (wil->reply_id && wil->reply_id == id) {
944 if (wil->reply_buf) {
945 memcpy(wil->reply_buf, wmi,
946 min(len, wil->reply_size));
947 } else {
948 wmi_evt_call_handler(wil, id, evt_data,
949 len - sizeof(*wmi));
950 }
951 wil_dbg_wmi(wil, "Complete WMI 0x%04x\n", id);
952 complete(&wil->wmi_ready);
953 return;
954 }
955 /* unsolicited event */
956 /* search for handler */
957 if (!wmi_evt_call_handler(wil, id, evt_data,
958 len - sizeof(*wmi))) {
959 wil_err(wil, "Unhandled event 0x%04x\n", id);
960 }
961 } else {
962 wil_err(wil, "Unknown event type\n");
963 print_hex_dump(KERN_ERR, "evt?? ", DUMP_PREFIX_OFFSET, 16, 1,
964 hdr, sizeof(*hdr) + len, true);
965 }
966 }
967
968 /*
969 * Retrieve next WMI event from the pending list
970 */
971 static struct list_head *next_wmi_ev(struct wil6210_priv *wil)
972 {
973 ulong flags;
974 struct list_head *ret = NULL;
975
976 spin_lock_irqsave(&wil->wmi_ev_lock, flags);
977
978 if (!list_empty(&wil->pending_wmi_ev)) {
979 ret = wil->pending_wmi_ev.next;
980 list_del(ret);
981 }
982
983 spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
984
985 return ret;
986 }
987
988 /*
989 * Handler for the WMI events
990 */
991 void wmi_event_worker(struct work_struct *work)
992 {
993 struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
994 wmi_event_worker);
995 struct pending_wmi_event *evt;
996 struct list_head *lh;
997
998 while ((lh = next_wmi_ev(wil)) != NULL) {
999 evt = list_entry(lh, struct pending_wmi_event, list);
1000 wmi_event_handle(wil, &evt->event.hdr);
1001 kfree(evt);
1002 }
1003 }
1004
1005 void wmi_connect_worker(struct work_struct *work)
1006 {
1007 int rc;
1008 struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
1009 wmi_connect_worker);
1010
1011 if (wil->pending_connect_cid < 0) {
1012 wil_err(wil, "No connection pending\n");
1013 return;
1014 }
1015
1016 wil_dbg_wmi(wil, "Configure for connection CID %d\n",
1017 wil->pending_connect_cid);
1018
1019 rc = wil_vring_init_tx(wil, 0, WIL6210_TX_RING_SIZE,
1020 wil->pending_connect_cid, 0);
1021 wil->pending_connect_cid = -1;
1022 if (rc == 0)
1023 wil_link_on(wil);
1024 }
Linus' kernel tree