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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 | ||
17 | #include <linux/pci.h> | |
18 | #include <linux/io.h> | |
19 | #include <linux/list.h> | |
20 | #include <linux/etherdevice.h> | |
21 | ||
22 | #include "wil6210.h" | |
23 | #include "wmi.h" | |
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 | */ | |
69 | static 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 */ | |
78 | {0x8c0000, 0x932000, 0x8c0000}, /* trivial mapping for upper area */ | |
79 | /* | |
80 | * 920000..930000 ucode code RAM | |
81 | * 930000..932000 ucode data RAM | |
82 | */ | |
83 | }; | |
84 | ||
85 | /** | |
86 | * return AHB address for given firmware/ucode internal (linker) address | |
87 | * @x - internal address | |
88 | * If address have no valid AHB mapping, return 0 | |
89 | */ | |
90 | static u32 wmi_addr_remap(u32 x) | |
91 | { | |
92 | uint i; | |
93 | ||
94 | for (i = 0; i < ARRAY_SIZE(fw_mapping); i++) { | |
95 | if ((x >= fw_mapping[i].from) && (x < fw_mapping[i].to)) | |
96 | return x + fw_mapping[i].host - fw_mapping[i].from; | |
97 | } | |
98 | ||
99 | return 0; | |
100 | } | |
101 | ||
102 | /** | |
103 | * Check address validity for WMI buffer; remap if needed | |
104 | * @ptr - internal (linker) fw/ucode address | |
105 | * | |
106 | * Valid buffer should be DWORD aligned | |
107 | * | |
108 | * return address for accessing buffer from the host; | |
109 | * if buffer is not valid, return NULL. | |
110 | */ | |
111 | void __iomem *wmi_buffer(struct wil6210_priv *wil, __le32 ptr_) | |
112 | { | |
113 | u32 off; | |
114 | u32 ptr = le32_to_cpu(ptr_); | |
115 | ||
116 | if (ptr % 4) | |
117 | return NULL; | |
118 | ||
119 | ptr = wmi_addr_remap(ptr); | |
120 | if (ptr < WIL6210_FW_HOST_OFF) | |
121 | return NULL; | |
122 | ||
123 | off = HOSTADDR(ptr); | |
124 | if (off > WIL6210_MEM_SIZE - 4) | |
125 | return NULL; | |
126 | ||
127 | return wil->csr + off; | |
128 | } | |
129 | ||
130 | /** | |
131 | * Check address validity | |
132 | */ | |
133 | void __iomem *wmi_addr(struct wil6210_priv *wil, u32 ptr) | |
134 | { | |
135 | u32 off; | |
136 | ||
137 | if (ptr % 4) | |
138 | return NULL; | |
139 | ||
140 | if (ptr < WIL6210_FW_HOST_OFF) | |
141 | return NULL; | |
142 | ||
143 | off = HOSTADDR(ptr); | |
144 | if (off > WIL6210_MEM_SIZE - 4) | |
145 | return NULL; | |
146 | ||
147 | return wil->csr + off; | |
148 | } | |
149 | ||
150 | int wmi_read_hdr(struct wil6210_priv *wil, __le32 ptr, | |
151 | struct wil6210_mbox_hdr *hdr) | |
152 | { | |
153 | void __iomem *src = wmi_buffer(wil, ptr); | |
154 | if (!src) | |
155 | return -EINVAL; | |
156 | ||
157 | wil_memcpy_fromio_32(hdr, src, sizeof(*hdr)); | |
158 | ||
159 | return 0; | |
160 | } | |
161 | ||
162 | static int __wmi_send(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len) | |
163 | { | |
164 | struct { | |
165 | struct wil6210_mbox_hdr hdr; | |
166 | struct wil6210_mbox_hdr_wmi wmi; | |
167 | } __packed cmd = { | |
168 | .hdr = { | |
169 | .type = WIL_MBOX_HDR_TYPE_WMI, | |
170 | .flags = 0, | |
171 | .len = cpu_to_le16(sizeof(cmd.wmi) + len), | |
172 | }, | |
173 | .wmi = { | |
174 | .id = cpu_to_le16(cmdid), | |
175 | .info1 = 0, | |
176 | }, | |
177 | }; | |
178 | struct wil6210_mbox_ring *r = &wil->mbox_ctl.tx; | |
179 | struct wil6210_mbox_ring_desc d_head; | |
180 | u32 next_head; | |
181 | void __iomem *dst; | |
182 | void __iomem *head = wmi_addr(wil, r->head); | |
183 | uint retry; | |
184 | ||
185 | if (sizeof(cmd) + len > r->entry_size) { | |
186 | wil_err(wil, "WMI size too large: %d bytes, max is %d\n", | |
187 | (int)(sizeof(cmd) + len), r->entry_size); | |
188 | return -ERANGE; | |
189 | ||
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); | |
216 | wil_dbg_WMI(wil, "Head 0x%08x -> 0x%08x\n", r->head, next_head); | |
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 */ | |
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, | |
239 | sizeof(cmd), true); | |
240 | wil_hex_dump_WMI("cmd ", DUMP_PREFIX_OFFSET, 16, 1, buf, | |
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 | ||
251 | /* interrupt to FW */ | |
252 | iowrite32(SW_INT_MBOX, wil->csr + HOST_SW_INT); | |
253 | ||
254 | return 0; | |
255 | } | |
256 | ||
257 | int wmi_send(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len) | |
258 | { | |
259 | int rc; | |
260 | ||
261 | mutex_lock(&wil->wmi_mutex); | |
262 | rc = __wmi_send(wil, cmdid, buf, len); | |
263 | mutex_unlock(&wil->wmi_mutex); | |
264 | ||
265 | return rc; | |
266 | } | |
267 | ||
268 | /*=== Event handlers ===*/ | |
269 | static void wmi_evt_ready(struct wil6210_priv *wil, int id, void *d, int len) | |
270 | { | |
271 | struct net_device *ndev = wil_to_ndev(wil); | |
272 | struct wireless_dev *wdev = wil->wdev; | |
273 | struct wmi_ready_event *evt = d; | |
274 | u32 ver = le32_to_cpu(evt->sw_version); | |
275 | ||
276 | wil_dbg_WMI(wil, "FW ver. %d; MAC %pM\n", ver, evt->mac); | |
277 | ||
278 | if (!is_valid_ether_addr(ndev->dev_addr)) { | |
279 | memcpy(ndev->dev_addr, evt->mac, ETH_ALEN); | |
280 | memcpy(ndev->perm_addr, evt->mac, ETH_ALEN); | |
281 | } | |
282 | snprintf(wdev->wiphy->fw_version, sizeof(wdev->wiphy->fw_version), | |
283 | "%d", ver); | |
284 | } | |
285 | ||
286 | static void wmi_evt_fw_ready(struct wil6210_priv *wil, int id, void *d, | |
287 | int len) | |
288 | { | |
289 | wil_dbg_WMI(wil, "WMI: FW ready\n"); | |
290 | ||
291 | set_bit(wil_status_fwready, &wil->status); | |
292 | /* reuse wmi_ready for the firmware ready indication */ | |
293 | complete(&wil->wmi_ready); | |
294 | } | |
295 | ||
296 | static void wmi_evt_rx_mgmt(struct wil6210_priv *wil, int id, void *d, int len) | |
297 | { | |
298 | struct wmi_rx_mgmt_packet_event *data = d; | |
299 | struct wiphy *wiphy = wil_to_wiphy(wil); | |
300 | struct ieee80211_mgmt *rx_mgmt_frame = | |
301 | (struct ieee80211_mgmt *)data->payload; | |
302 | int ch_no = data->info.channel+1; | |
303 | u32 freq = ieee80211_channel_to_frequency(ch_no, | |
304 | IEEE80211_BAND_60GHZ); | |
305 | struct ieee80211_channel *channel = ieee80211_get_channel(wiphy, freq); | |
306 | /* TODO convert LE to CPU */ | |
307 | s32 signal = 0; /* TODO */ | |
308 | __le16 fc = rx_mgmt_frame->frame_control; | |
309 | u32 d_len = le32_to_cpu(data->info.len); | |
310 | u16 d_status = le16_to_cpu(data->info.status); | |
311 | ||
312 | wil_dbg_WMI(wil, "MGMT: channel %d MCS %d SNR %d\n", | |
313 | data->info.channel, data->info.mcs, data->info.snr); | |
314 | wil_dbg_WMI(wil, "status 0x%04x len %d stype %04x\n", d_status, d_len, | |
315 | le16_to_cpu(data->info.stype)); | |
316 | wil_dbg_WMI(wil, "qid %d mid %d cid %d\n", | |
317 | data->info.qid, data->info.mid, data->info.cid); | |
318 | ||
319 | if (!channel) { | |
320 | wil_err(wil, "Frame on unsupported channel\n"); | |
321 | return; | |
322 | } | |
323 | ||
324 | if (ieee80211_is_beacon(fc) || ieee80211_is_probe_resp(fc)) { | |
325 | struct cfg80211_bss *bss; | |
326 | u64 tsf = le64_to_cpu(rx_mgmt_frame->u.beacon.timestamp); | |
327 | u16 cap = le16_to_cpu(rx_mgmt_frame->u.beacon.capab_info); | |
328 | u16 bi = le16_to_cpu(rx_mgmt_frame->u.beacon.beacon_int); | |
329 | const u8 *ie_buf = rx_mgmt_frame->u.beacon.variable; | |
330 | size_t ie_len = d_len - offsetof(struct ieee80211_mgmt, | |
331 | u.beacon.variable); | |
332 | wil_dbg_WMI(wil, "Capability info : 0x%04x\n", cap); | |
333 | ||
334 | bss = cfg80211_inform_bss(wiphy, channel, rx_mgmt_frame->bssid, | |
335 | tsf, cap, bi, ie_buf, ie_len, | |
336 | signal, GFP_KERNEL); | |
337 | if (bss) { | |
338 | wil_dbg_WMI(wil, "Added BSS %pM\n", | |
339 | rx_mgmt_frame->bssid); | |
340 | cfg80211_put_bss(bss); | |
341 | } else { | |
342 | wil_err(wil, "cfg80211_inform_bss() failed\n"); | |
343 | } | |
344 | } | |
345 | } | |
346 | ||
347 | static void wmi_evt_scan_complete(struct wil6210_priv *wil, int id, | |
348 | void *d, int len) | |
349 | { | |
350 | if (wil->scan_request) { | |
351 | struct wmi_scan_complete_event *data = d; | |
352 | bool aborted = (data->status != 0); | |
353 | ||
354 | wil_dbg_WMI(wil, "SCAN_COMPLETE(0x%08x)\n", data->status); | |
355 | cfg80211_scan_done(wil->scan_request, aborted); | |
356 | wil->scan_request = NULL; | |
357 | } else { | |
358 | wil_err(wil, "SCAN_COMPLETE while not scanning\n"); | |
359 | } | |
360 | } | |
361 | ||
362 | static void wmi_evt_connect(struct wil6210_priv *wil, int id, void *d, int len) | |
363 | { | |
364 | struct net_device *ndev = wil_to_ndev(wil); | |
365 | struct wireless_dev *wdev = wil->wdev; | |
366 | struct wmi_connect_event *evt = d; | |
367 | int ch; /* channel number */ | |
368 | struct station_info sinfo; | |
369 | u8 *assoc_req_ie, *assoc_resp_ie; | |
370 | size_t assoc_req_ielen, assoc_resp_ielen; | |
371 | /* capinfo(u16) + listen_interval(u16) + IEs */ | |
372 | const size_t assoc_req_ie_offset = sizeof(u16) * 2; | |
373 | /* capinfo(u16) + status_code(u16) + associd(u16) + IEs */ | |
374 | const size_t assoc_resp_ie_offset = sizeof(u16) * 3; | |
375 | ||
376 | if (len < sizeof(*evt)) { | |
377 | wil_err(wil, "Connect event too short : %d bytes\n", len); | |
378 | return; | |
379 | } | |
380 | if (len != sizeof(*evt) + evt->beacon_ie_len + evt->assoc_req_len + | |
381 | evt->assoc_resp_len) { | |
382 | wil_err(wil, | |
383 | "Connect event corrupted : %d != %d + %d + %d + %d\n", | |
384 | len, (int)sizeof(*evt), evt->beacon_ie_len, | |
385 | evt->assoc_req_len, evt->assoc_resp_len); | |
386 | return; | |
387 | } | |
388 | ch = evt->channel + 1; | |
389 | wil_dbg_WMI(wil, "Connect %pM channel [%d] cid %d\n", | |
390 | evt->bssid, ch, evt->cid); | |
391 | wil_hex_dump_WMI("connect AI : ", DUMP_PREFIX_OFFSET, 16, 1, | |
392 | evt->assoc_info, len - sizeof(*evt), true); | |
393 | ||
394 | /* figure out IE's */ | |
395 | assoc_req_ie = &evt->assoc_info[evt->beacon_ie_len + | |
396 | assoc_req_ie_offset]; | |
397 | assoc_req_ielen = evt->assoc_req_len - assoc_req_ie_offset; | |
398 | if (evt->assoc_req_len <= assoc_req_ie_offset) { | |
399 | assoc_req_ie = NULL; | |
400 | assoc_req_ielen = 0; | |
401 | } | |
402 | ||
403 | assoc_resp_ie = &evt->assoc_info[evt->beacon_ie_len + | |
404 | evt->assoc_req_len + | |
405 | assoc_resp_ie_offset]; | |
406 | assoc_resp_ielen = evt->assoc_resp_len - assoc_resp_ie_offset; | |
407 | if (evt->assoc_resp_len <= assoc_resp_ie_offset) { | |
408 | assoc_resp_ie = NULL; | |
409 | assoc_resp_ielen = 0; | |
410 | } | |
411 | ||
412 | if ((wdev->iftype == NL80211_IFTYPE_STATION) || | |
413 | (wdev->iftype == NL80211_IFTYPE_P2P_CLIENT)) { | |
414 | if (wdev->sme_state != CFG80211_SME_CONNECTING) { | |
415 | wil_err(wil, "Not in connecting state\n"); | |
416 | return; | |
417 | } | |
418 | del_timer_sync(&wil->connect_timer); | |
419 | cfg80211_connect_result(ndev, evt->bssid, | |
420 | assoc_req_ie, assoc_req_ielen, | |
421 | assoc_resp_ie, assoc_resp_ielen, | |
422 | WLAN_STATUS_SUCCESS, GFP_KERNEL); | |
423 | ||
424 | } else if ((wdev->iftype == NL80211_IFTYPE_AP) || | |
425 | (wdev->iftype == NL80211_IFTYPE_P2P_GO)) { | |
426 | memset(&sinfo, 0, sizeof(sinfo)); | |
427 | ||
428 | sinfo.generation = wil->sinfo_gen++; | |
429 | ||
430 | if (assoc_req_ie) { | |
431 | sinfo.assoc_req_ies = assoc_req_ie; | |
432 | sinfo.assoc_req_ies_len = assoc_req_ielen; | |
433 | sinfo.filled |= STATION_INFO_ASSOC_REQ_IES; | |
434 | } | |
435 | ||
436 | cfg80211_new_sta(ndev, evt->bssid, &sinfo, GFP_KERNEL); | |
437 | } | |
438 | set_bit(wil_status_fwconnected, &wil->status); | |
439 | ||
440 | /* FIXME FW can transmit only ucast frames to peer */ | |
441 | /* FIXME real ring_id instead of hard coded 0 */ | |
442 | memcpy(wil->dst_addr[0], evt->bssid, ETH_ALEN); | |
443 | ||
444 | wil->pending_connect_cid = evt->cid; | |
445 | queue_work(wil->wmi_wq_conn, &wil->wmi_connect_worker); | |
446 | } | |
447 | ||
448 | static void wmi_evt_disconnect(struct wil6210_priv *wil, int id, | |
449 | void *d, int len) | |
450 | { | |
451 | struct wmi_disconnect_event *evt = d; | |
452 | ||
453 | wil_dbg_WMI(wil, "Disconnect %pM reason %d proto %d wmi\n", | |
454 | evt->bssid, | |
455 | evt->protocol_reason_status, evt->disconnect_reason); | |
456 | ||
457 | wil->sinfo_gen++; | |
458 | ||
459 | wil6210_disconnect(wil, evt->bssid); | |
460 | clear_bit(wil_status_dontscan, &wil->status); | |
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 | void wmi_event_flush(struct wil6210_priv *wil) | |
857 | { | |
858 | struct pending_wmi_event *evt, *t; | |
859 | ||
860 | wil_dbg_WMI(wil, "%s()\n", __func__); | |
861 | ||
862 | list_for_each_entry_safe(evt, t, &wil->pending_wmi_ev, list) { | |
863 | list_del(&evt->list); | |
864 | kfree(evt); | |
865 | } | |
866 | } | |
867 | ||
868 | static bool wmi_evt_call_handler(struct wil6210_priv *wil, int id, | |
869 | void *d, int len) | |
870 | { | |
871 | uint i; | |
872 | ||
873 | for (i = 0; i < ARRAY_SIZE(wmi_evt_handlers); i++) { | |
874 | if (wmi_evt_handlers[i].eventid == id) { | |
875 | wmi_evt_handlers[i].handler(wil, id, d, len); | |
876 | return true; | |
877 | } | |
878 | } | |
879 | ||
880 | return false; | |
881 | } | |
882 | ||
883 | static void wmi_event_handle(struct wil6210_priv *wil, | |
884 | struct wil6210_mbox_hdr *hdr) | |
885 | { | |
886 | u16 len = le16_to_cpu(hdr->len); | |
887 | ||
888 | if ((hdr->type == WIL_MBOX_HDR_TYPE_WMI) && | |
889 | (len >= sizeof(struct wil6210_mbox_hdr_wmi))) { | |
890 | struct wil6210_mbox_hdr_wmi *wmi = (void *)(&hdr[1]); | |
891 | void *evt_data = (void *)(&wmi[1]); | |
892 | u16 id = le16_to_cpu(wmi->id); | |
893 | /* check if someone waits for this event */ | |
894 | if (wil->reply_id && wil->reply_id == id) { | |
895 | if (wil->reply_buf) { | |
896 | memcpy(wil->reply_buf, wmi, | |
897 | min(len, wil->reply_size)); | |
898 | } else { | |
899 | wmi_evt_call_handler(wil, id, evt_data, | |
900 | len - sizeof(*wmi)); | |
901 | } | |
902 | wil_dbg_WMI(wil, "Complete WMI 0x%04x\n", id); | |
903 | complete(&wil->wmi_ready); | |
904 | return; | |
905 | } | |
906 | /* unsolicited event */ | |
907 | /* search for handler */ | |
908 | if (!wmi_evt_call_handler(wil, id, evt_data, | |
909 | len - sizeof(*wmi))) { | |
910 | wil_err(wil, "Unhandled event 0x%04x\n", id); | |
911 | } | |
912 | } else { | |
913 | wil_err(wil, "Unknown event type\n"); | |
914 | print_hex_dump(KERN_ERR, "evt?? ", DUMP_PREFIX_OFFSET, 16, 1, | |
915 | hdr, sizeof(*hdr) + len, true); | |
916 | } | |
917 | } | |
918 | ||
919 | /* | |
920 | * Retrieve next WMI event from the pending list | |
921 | */ | |
922 | static struct list_head *next_wmi_ev(struct wil6210_priv *wil) | |
923 | { | |
924 | ulong flags; | |
925 | struct list_head *ret = NULL; | |
926 | ||
927 | spin_lock_irqsave(&wil->wmi_ev_lock, flags); | |
928 | ||
929 | if (!list_empty(&wil->pending_wmi_ev)) { | |
930 | ret = wil->pending_wmi_ev.next; | |
931 | list_del(ret); | |
932 | } | |
933 | ||
934 | spin_unlock_irqrestore(&wil->wmi_ev_lock, flags); | |
935 | ||
936 | return ret; | |
937 | } | |
938 | ||
939 | /* | |
940 | * Handler for the WMI events | |
941 | */ | |
942 | void wmi_event_worker(struct work_struct *work) | |
943 | { | |
944 | struct wil6210_priv *wil = container_of(work, struct wil6210_priv, | |
945 | wmi_event_worker); | |
946 | struct pending_wmi_event *evt; | |
947 | struct list_head *lh; | |
948 | ||
949 | while ((lh = next_wmi_ev(wil)) != NULL) { | |
950 | evt = list_entry(lh, struct pending_wmi_event, list); | |
951 | wmi_event_handle(wil, &evt->event.hdr); | |
952 | kfree(evt); | |
953 | } | |
954 | } | |
955 | ||
956 | void wmi_connect_worker(struct work_struct *work) | |
957 | { | |
958 | int rc; | |
959 | struct wil6210_priv *wil = container_of(work, struct wil6210_priv, | |
960 | wmi_connect_worker); | |
961 | ||
962 | if (wil->pending_connect_cid < 0) { | |
963 | wil_err(wil, "No connection pending\n"); | |
964 | return; | |
965 | } | |
966 | ||
967 | wil_dbg_WMI(wil, "Configure for connection CID %d\n", | |
968 | wil->pending_connect_cid); | |
969 | ||
970 | rc = wil_vring_init_tx(wil, 0, WIL6210_TX_RING_SIZE, | |
971 | wil->pending_connect_cid, 0); | |
972 | wil->pending_connect_cid = -1; | |
973 | if (rc == 0) | |
974 | wil_link_on(wil); | |
975 | } |