1 // SPDX-License-Identifier: BSD-3-Clause-Clear
2 /*
3 * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
4 * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
5 */
6
7 #include "testmode.h"
8 #include <net/netlink.h>
9 #include "debug.h"
10 #include "wmi.h"
11 #include "hw.h"
12 #include "core.h"
13 #include "testmode_i.h"
14
15 #define ATH11K_FTM_SEGHDR_CURRENT_SEQ GENMASK(3, 0)
16 #define ATH11K_FTM_SEGHDR_TOTAL_SEGMENTS GENMASK(7, 4)
17
18 static const struct nla_policy ath11k_tm_policy[ATH11K_TM_ATTR_MAX + 1] = {
19 [ATH11K_TM_ATTR_CMD] = { .type = NLA_U32 },
20 [ATH11K_TM_ATTR_DATA] = { .type = NLA_BINARY,
21 .len = ATH11K_TM_DATA_MAX_LEN },
22 [ATH11K_TM_ATTR_WMI_CMDID] = { .type = NLA_U32 },
23 [ATH11K_TM_ATTR_VERSION_MAJOR] = { .type = NLA_U32 },
24 [ATH11K_TM_ATTR_VERSION_MINOR] = { .type = NLA_U32 },
25 };
26
ath11k_tm_get_ar(struct ath11k_base * ab)27 static struct ath11k *ath11k_tm_get_ar(struct ath11k_base *ab)
28 {
29 struct ath11k_pdev *pdev;
30 struct ath11k *ar = NULL;
31 int i;
32
33 for (i = 0; i < ab->num_radios; i++) {
34 pdev = &ab->pdevs[i];
35 ar = pdev->ar;
36
37 if (ar && ar->state == ATH11K_STATE_FTM)
38 break;
39 }
40
41 return ar;
42 }
43
44 /* This function handles unsegmented events. Data in various events are aggregated
45 * in application layer, this event is unsegmented from host perspective.
46 */
ath11k_tm_wmi_event_unsegmented(struct ath11k_base * ab,u32 cmd_id,struct sk_buff * skb)47 static void ath11k_tm_wmi_event_unsegmented(struct ath11k_base *ab, u32 cmd_id,
48 struct sk_buff *skb)
49 {
50 struct sk_buff *nl_skb;
51 struct ath11k *ar;
52
53 ath11k_dbg(ab, ATH11K_DBG_TESTMODE,
54 "event wmi cmd_id %d skb length %d\n",
55 cmd_id, skb->len);
56 ath11k_dbg_dump(ab, ATH11K_DBG_TESTMODE, NULL, "", skb->data, skb->len);
57
58 ar = ath11k_tm_get_ar(ab);
59 if (!ar) {
60 ath11k_warn(ab, "testmode event not handled due to invalid pdev\n");
61 return;
62 }
63
64 spin_lock_bh(&ar->data_lock);
65
66 nl_skb = cfg80211_testmode_alloc_event_skb(ar->hw->wiphy,
67 2 * nla_total_size(sizeof(u32)) +
68 nla_total_size(skb->len),
69 GFP_ATOMIC);
70 if (!nl_skb) {
71 ath11k_warn(ab,
72 "failed to allocate skb for unsegmented testmode wmi event\n");
73 goto out;
74 }
75
76 if (nla_put_u32(nl_skb, ATH11K_TM_ATTR_CMD, ATH11K_TM_CMD_WMI) ||
77 nla_put_u32(nl_skb, ATH11K_TM_ATTR_WMI_CMDID, cmd_id) ||
78 nla_put(nl_skb, ATH11K_TM_ATTR_DATA, skb->len, skb->data)) {
79 ath11k_warn(ab, "failed to populate testmode unsegmented event\n");
80 kfree_skb(nl_skb);
81 goto out;
82 }
83
84 cfg80211_testmode_event(nl_skb, GFP_ATOMIC);
85 spin_unlock_bh(&ar->data_lock);
86 return;
87
88 out:
89 spin_unlock_bh(&ar->data_lock);
90 ath11k_warn(ab, "Failed to send testmode event to higher layers\n");
91 }
92
93 /* This function handles segmented events. Data of various events received
94 * from firmware is aggregated and sent to application layer
95 */
ath11k_tm_process_event(struct ath11k_base * ab,u32 cmd_id,const struct wmi_ftm_event_msg * ftm_msg,u16 length)96 static int ath11k_tm_process_event(struct ath11k_base *ab, u32 cmd_id,
97 const struct wmi_ftm_event_msg *ftm_msg,
98 u16 length)
99 {
100 struct sk_buff *nl_skb;
101 int ret = 0;
102 struct ath11k *ar;
103 u8 const *buf_pos;
104 u16 datalen;
105 u8 total_segments, current_seq;
106 u32 data_pos;
107 u32 pdev_id;
108
109 ath11k_dbg(ab, ATH11K_DBG_TESTMODE,
110 "event wmi cmd_id %d ftm event msg %pK datalen %d\n",
111 cmd_id, ftm_msg, length);
112 ath11k_dbg_dump(ab, ATH11K_DBG_TESTMODE, NULL, "", ftm_msg, length);
113 pdev_id = DP_HW2SW_MACID(ftm_msg->seg_hdr.pdev_id);
114
115 if (pdev_id >= ab->num_radios) {
116 ath11k_warn(ab, "testmode event not handled due to invalid pdev id: %d\n",
117 pdev_id);
118 return -EINVAL;
119 }
120
121 ar = ab->pdevs[pdev_id].ar;
122 if (!ar) {
123 ath11k_warn(ab, "testmode event not handled due to absence of pdev\n");
124 return -ENODEV;
125 }
126
127 current_seq = FIELD_GET(ATH11K_FTM_SEGHDR_CURRENT_SEQ,
128 ftm_msg->seg_hdr.segmentinfo);
129 total_segments = FIELD_GET(ATH11K_FTM_SEGHDR_TOTAL_SEGMENTS,
130 ftm_msg->seg_hdr.segmentinfo);
131 datalen = length - (sizeof(struct wmi_ftm_seg_hdr));
132 buf_pos = ftm_msg->data;
133
134 spin_lock_bh(&ar->data_lock);
135
136 if (current_seq == 0) {
137 ab->testmode.expected_seq = 0;
138 ab->testmode.data_pos = 0;
139 }
140
141 data_pos = ab->testmode.data_pos;
142
143 if ((data_pos + datalen) > ATH11K_FTM_EVENT_MAX_BUF_LENGTH) {
144 ath11k_warn(ab, "Invalid ftm event length at %d: %d\n",
145 data_pos, datalen);
146 ret = -EINVAL;
147 goto out;
148 }
149
150 memcpy(&ab->testmode.eventdata[data_pos], buf_pos, datalen);
151 data_pos += datalen;
152
153 if (++ab->testmode.expected_seq != total_segments) {
154 ab->testmode.data_pos = data_pos;
155 ath11k_dbg(ab, ATH11K_DBG_TESTMODE,
156 "partial data received current_seq %d total_seg %d\n",
157 current_seq, total_segments);
158 goto out;
159 }
160
161 ath11k_dbg(ab, ATH11K_DBG_TESTMODE,
162 "total data length pos %d len %d\n",
163 data_pos, ftm_msg->seg_hdr.len);
164 nl_skb = cfg80211_testmode_alloc_event_skb(ar->hw->wiphy,
165 2 * nla_total_size(sizeof(u32)) +
166 nla_total_size(data_pos),
167 GFP_ATOMIC);
168 if (!nl_skb) {
169 ath11k_warn(ab,
170 "failed to allocate skb for segmented testmode wmi event\n");
171 ret = -ENOMEM;
172 goto out;
173 }
174
175 if (nla_put_u32(nl_skb, ATH11K_TM_ATTR_CMD,
176 ATH11K_TM_CMD_WMI_FTM) ||
177 nla_put_u32(nl_skb, ATH11K_TM_ATTR_WMI_CMDID, cmd_id) ||
178 nla_put(nl_skb, ATH11K_TM_ATTR_DATA, data_pos,
179 &ab->testmode.eventdata[0])) {
180 ath11k_warn(ab, "failed to populate segmented testmode event");
181 kfree_skb(nl_skb);
182 ret = -ENOBUFS;
183 goto out;
184 }
185
186 cfg80211_testmode_event(nl_skb, GFP_ATOMIC);
187
188 out:
189 spin_unlock_bh(&ar->data_lock);
190 return ret;
191 }
192
ath11k_tm_wmi_event_segmented(struct ath11k_base * ab,u32 cmd_id,struct sk_buff * skb)193 static void ath11k_tm_wmi_event_segmented(struct ath11k_base *ab, u32 cmd_id,
194 struct sk_buff *skb)
195 {
196 const void **tb;
197 const struct wmi_ftm_event_msg *ev;
198 u16 length;
199 int ret;
200
201 tb = ath11k_wmi_tlv_parse_alloc(ab, skb->data, skb->len, GFP_ATOMIC);
202 if (IS_ERR(tb)) {
203 ret = PTR_ERR(tb);
204 ath11k_warn(ab, "failed to parse ftm event tlv: %d\n", ret);
205 return;
206 }
207
208 ev = tb[WMI_TAG_ARRAY_BYTE];
209 if (!ev) {
210 ath11k_warn(ab, "failed to fetch ftm msg\n");
211 kfree(tb);
212 return;
213 }
214
215 length = skb->len - TLV_HDR_SIZE;
216 ret = ath11k_tm_process_event(ab, cmd_id, ev, length);
217 if (ret)
218 ath11k_warn(ab, "Failed to process ftm event\n");
219
220 kfree(tb);
221 }
222
ath11k_tm_wmi_event(struct ath11k_base * ab,u32 cmd_id,struct sk_buff * skb)223 void ath11k_tm_wmi_event(struct ath11k_base *ab, u32 cmd_id, struct sk_buff *skb)
224 {
225 if (test_bit(ATH11K_FLAG_FTM_SEGMENTED, &ab->dev_flags))
226 ath11k_tm_wmi_event_segmented(ab, cmd_id, skb);
227 else
228 ath11k_tm_wmi_event_unsegmented(ab, cmd_id, skb);
229 }
230
ath11k_tm_cmd_get_version(struct ath11k * ar,struct nlattr * tb[])231 static int ath11k_tm_cmd_get_version(struct ath11k *ar, struct nlattr *tb[])
232 {
233 struct sk_buff *skb;
234 int ret;
235
236 ath11k_dbg(ar->ab, ATH11K_DBG_TESTMODE,
237 "cmd get version_major %d version_minor %d\n",
238 ATH11K_TESTMODE_VERSION_MAJOR,
239 ATH11K_TESTMODE_VERSION_MINOR);
240
241 skb = cfg80211_testmode_alloc_reply_skb(ar->hw->wiphy,
242 nla_total_size(sizeof(u32)));
243 if (!skb)
244 return -ENOMEM;
245
246 ret = nla_put_u32(skb, ATH11K_TM_ATTR_VERSION_MAJOR,
247 ATH11K_TESTMODE_VERSION_MAJOR);
248 if (ret) {
249 kfree_skb(skb);
250 return ret;
251 }
252
253 ret = nla_put_u32(skb, ATH11K_TM_ATTR_VERSION_MINOR,
254 ATH11K_TESTMODE_VERSION_MINOR);
255 if (ret) {
256 kfree_skb(skb);
257 return ret;
258 }
259
260 return cfg80211_testmode_reply(skb);
261 }
262
ath11k_tm_cmd_testmode_start(struct ath11k * ar,struct nlattr * tb[])263 static int ath11k_tm_cmd_testmode_start(struct ath11k *ar, struct nlattr *tb[])
264 {
265 int ret;
266
267 mutex_lock(&ar->conf_mutex);
268
269 if (ar->state == ATH11K_STATE_FTM) {
270 ret = -EALREADY;
271 goto err;
272 }
273
274 /* start utf only when the driver is not in use */
275 if (ar->state != ATH11K_STATE_OFF) {
276 ret = -EBUSY;
277 goto err;
278 }
279
280 ar->ab->testmode.eventdata = kzalloc(ATH11K_FTM_EVENT_MAX_BUF_LENGTH,
281 GFP_KERNEL);
282 if (!ar->ab->testmode.eventdata) {
283 ret = -ENOMEM;
284 goto err;
285 }
286
287 ar->state = ATH11K_STATE_FTM;
288 ar->ftm_msgref = 0;
289
290 mutex_unlock(&ar->conf_mutex);
291
292 ath11k_dbg(ar->ab, ATH11K_DBG_TESTMODE, "cmd start\n");
293 return 0;
294
295 err:
296 mutex_unlock(&ar->conf_mutex);
297 return ret;
298 }
299
ath11k_tm_cmd_wmi(struct ath11k * ar,struct nlattr * tb[],struct ieee80211_vif * vif)300 static int ath11k_tm_cmd_wmi(struct ath11k *ar, struct nlattr *tb[],
301 struct ieee80211_vif *vif)
302 {
303 struct ath11k_pdev_wmi *wmi = ar->wmi;
304 struct sk_buff *skb;
305 struct ath11k_vif *arvif;
306 u32 cmd_id, buf_len;
307 int ret, tag;
308 void *buf;
309 u32 *ptr;
310
311 mutex_lock(&ar->conf_mutex);
312
313 if (!tb[ATH11K_TM_ATTR_DATA]) {
314 ret = -EINVAL;
315 goto out;
316 }
317
318 if (!tb[ATH11K_TM_ATTR_WMI_CMDID]) {
319 ret = -EINVAL;
320 goto out;
321 }
322
323 buf = nla_data(tb[ATH11K_TM_ATTR_DATA]);
324 buf_len = nla_len(tb[ATH11K_TM_ATTR_DATA]);
325 if (!buf_len) {
326 ath11k_warn(ar->ab, "No data present in testmode wmi command\n");
327 ret = -EINVAL;
328 goto out;
329 }
330
331 cmd_id = nla_get_u32(tb[ATH11K_TM_ATTR_WMI_CMDID]);
332
333 /* Make sure that the buffer length is long enough to
334 * hold TLV and pdev/vdev id.
335 */
336 if (buf_len < sizeof(struct wmi_tlv) + sizeof(u32)) {
337 ret = -EINVAL;
338 goto out;
339 }
340
341 ptr = buf;
342 tag = FIELD_GET(WMI_TLV_TAG, *ptr);
343
344 /* pdev/vdev id start after TLV header */
345 ptr++;
346
347 if (tag == WMI_TAG_PDEV_SET_PARAM_CMD)
348 *ptr = ar->pdev->pdev_id;
349
350 if (ar->ab->fw_mode != ATH11K_FIRMWARE_MODE_FTM &&
351 (tag == WMI_TAG_VDEV_SET_PARAM_CMD || tag == WMI_TAG_UNIT_TEST_CMD)) {
352 if (vif) {
353 arvif = (struct ath11k_vif *)vif->drv_priv;
354 *ptr = arvif->vdev_id;
355 } else {
356 ret = -EINVAL;
357 goto out;
358 }
359 }
360
361 ath11k_dbg(ar->ab, ATH11K_DBG_TESTMODE,
362 "cmd wmi cmd_id %d buf length %d\n",
363 cmd_id, buf_len);
364
365 ath11k_dbg_dump(ar->ab, ATH11K_DBG_TESTMODE, NULL, "", buf, buf_len);
366
367 skb = ath11k_wmi_alloc_skb(wmi->wmi_ab, buf_len);
368 if (!skb) {
369 ret = -ENOMEM;
370 goto out;
371 }
372
373 memcpy(skb->data, buf, buf_len);
374
375 ret = ath11k_wmi_cmd_send(wmi, skb, cmd_id);
376 if (ret) {
377 dev_kfree_skb(skb);
378 ath11k_warn(ar->ab, "failed to transmit wmi command (testmode): %d\n",
379 ret);
380 goto out;
381 }
382
383 ret = 0;
384
385 out:
386 mutex_unlock(&ar->conf_mutex);
387 return ret;
388 }
389
ath11k_tm_cmd_wmi_ftm(struct ath11k * ar,struct nlattr * tb[])390 static int ath11k_tm_cmd_wmi_ftm(struct ath11k *ar, struct nlattr *tb[])
391 {
392 struct ath11k_pdev_wmi *wmi = ar->wmi;
393 struct ath11k_base *ab = ar->ab;
394 struct sk_buff *skb;
395 u32 cmd_id, buf_len, hdr_info;
396 int ret;
397 void *buf;
398 u8 segnumber = 0, seginfo;
399 u16 chunk_len, total_bytes, num_segments;
400 u8 *bufpos;
401 struct wmi_ftm_cmd *ftm_cmd;
402
403 set_bit(ATH11K_FLAG_FTM_SEGMENTED, &ab->dev_flags);
404
405 mutex_lock(&ar->conf_mutex);
406
407 if (ar->state != ATH11K_STATE_FTM) {
408 ret = -ENETDOWN;
409 goto out;
410 }
411
412 if (!tb[ATH11K_TM_ATTR_DATA]) {
413 ret = -EINVAL;
414 goto out;
415 }
416
417 buf = nla_data(tb[ATH11K_TM_ATTR_DATA]);
418 buf_len = nla_len(tb[ATH11K_TM_ATTR_DATA]);
419 cmd_id = WMI_PDEV_UTF_CMDID;
420
421 ath11k_dbg(ar->ab, ATH11K_DBG_TESTMODE,
422 "cmd wmi ftm cmd_id %d buffer length %d\n",
423 cmd_id, buf_len);
424 ath11k_dbg_dump(ar->ab, ATH11K_DBG_TESTMODE, NULL, "", buf, buf_len);
425
426 bufpos = buf;
427 total_bytes = buf_len;
428 num_segments = total_bytes / MAX_WMI_UTF_LEN;
429
430 if (buf_len - (num_segments * MAX_WMI_UTF_LEN))
431 num_segments++;
432
433 while (buf_len) {
434 chunk_len = min_t(u16, buf_len, MAX_WMI_UTF_LEN);
435
436 skb = ath11k_wmi_alloc_skb(wmi->wmi_ab, (chunk_len +
437 sizeof(struct wmi_ftm_cmd)));
438 if (!skb) {
439 ret = -ENOMEM;
440 goto out;
441 }
442
443 ftm_cmd = (struct wmi_ftm_cmd *)skb->data;
444 hdr_info = FIELD_PREP(WMI_TLV_TAG, WMI_TAG_ARRAY_BYTE) |
445 FIELD_PREP(WMI_TLV_LEN, (chunk_len +
446 sizeof(struct wmi_ftm_seg_hdr)));
447 ftm_cmd->tlv_header = hdr_info;
448 ftm_cmd->seg_hdr.len = total_bytes;
449 ftm_cmd->seg_hdr.msgref = ar->ftm_msgref;
450 seginfo = FIELD_PREP(ATH11K_FTM_SEGHDR_TOTAL_SEGMENTS, num_segments) |
451 FIELD_PREP(ATH11K_FTM_SEGHDR_CURRENT_SEQ, segnumber);
452 ftm_cmd->seg_hdr.segmentinfo = seginfo;
453 segnumber++;
454
455 memcpy(&ftm_cmd->data, bufpos, chunk_len);
456
457 ret = ath11k_wmi_cmd_send(wmi, skb, cmd_id);
458 if (ret) {
459 ath11k_warn(ar->ab, "failed to send wmi ftm command: %d\n", ret);
460 goto out;
461 }
462
463 buf_len -= chunk_len;
464 bufpos += chunk_len;
465 }
466
467 ar->ftm_msgref++;
468 ret = 0;
469
470 out:
471 mutex_unlock(&ar->conf_mutex);
472 return ret;
473 }
474
ath11k_tm_cmd(struct ieee80211_hw * hw,struct ieee80211_vif * vif,void * data,int len)475 int ath11k_tm_cmd(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
476 void *data, int len)
477 {
478 struct ath11k *ar = hw->priv;
479 struct nlattr *tb[ATH11K_TM_ATTR_MAX + 1];
480 int ret;
481
482 ret = nla_parse(tb, ATH11K_TM_ATTR_MAX, data, len, ath11k_tm_policy,
483 NULL);
484 if (ret)
485 return ret;
486
487 if (!tb[ATH11K_TM_ATTR_CMD])
488 return -EINVAL;
489
490 switch (nla_get_u32(tb[ATH11K_TM_ATTR_CMD])) {
491 case ATH11K_TM_CMD_GET_VERSION:
492 return ath11k_tm_cmd_get_version(ar, tb);
493 case ATH11K_TM_CMD_WMI:
494 return ath11k_tm_cmd_wmi(ar, tb, vif);
495 case ATH11K_TM_CMD_TESTMODE_START:
496 return ath11k_tm_cmd_testmode_start(ar, tb);
497 case ATH11K_TM_CMD_WMI_FTM:
498 return ath11k_tm_cmd_wmi_ftm(ar, tb);
499 default:
500 return -EOPNOTSUPP;
501 }
502 }
503