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d2839953 RC |
1 | /* |
2 | * DHD debug ring API and structures | |
3 | * | |
4 | * <<Broadcom-WL-IPTag/Open:>> | |
5 | * | |
6 | * Copyright (C) 1999-2018, Broadcom. | |
7 | * | |
8 | * Unless you and Broadcom execute a separate written software license | |
9 | * agreement governing use of this software, this software is licensed to you | |
10 | * under the terms of the GNU General Public License version 2 (the "GPL"), | |
11 | * available at http://www.broadcom.com/licenses/GPLv2.php, with the | |
12 | * following added to such license: | |
13 | * | |
14 | * As a special exception, the copyright holders of this software give you | |
15 | * permission to link this software with independent modules, and to copy and | |
16 | * distribute the resulting executable under terms of your choice, provided that | |
17 | * you also meet, for each linked independent module, the terms and conditions of | |
18 | * the license of that module. An independent module is a module which is not | |
19 | * derived from this software. The special exception does not apply to any | |
20 | * modifications of the software. | |
21 | * | |
22 | * Notwithstanding the above, under no circumstances may you combine this | |
23 | * software in any way with any other Broadcom software provided under a license | |
24 | * other than the GPL, without Broadcom's express prior written consent. | |
25 | * | |
26 | * $Id: dhd_dbg_ring.c 769272 2018-06-25 09:23:27Z $ | |
27 | */ | |
28 | #include <typedefs.h> | |
29 | #include <osl.h> | |
30 | #include <bcmutils.h> | |
31 | #include <bcmendian.h> | |
32 | #include <dngl_stats.h> | |
33 | #include <dhd.h> | |
34 | #include <dhd_dbg.h> | |
35 | #include <dhd_dbg_ring.h> | |
36 | ||
37 | int | |
38 | dhd_dbg_ring_init(dhd_pub_t *dhdp, dhd_dbg_ring_t *ring, uint16 id, uint8 *name, | |
39 | uint32 ring_sz, void *allocd_buf) | |
40 | { | |
41 | void *buf; | |
42 | unsigned long flags = 0; | |
43 | ||
44 | if (allocd_buf == NULL) { | |
45 | return BCME_NOMEM; | |
46 | } else { | |
47 | buf = allocd_buf; | |
48 | } | |
49 | ||
50 | ring->lock = DHD_DBG_RING_LOCK_INIT(dhdp->osh); | |
51 | if (!ring->lock) | |
52 | return BCME_NOMEM; | |
53 | ||
54 | DHD_DBG_RING_LOCK(ring->lock, flags); | |
55 | ring->id = id; | |
56 | strncpy(ring->name, name, DBGRING_NAME_MAX); | |
57 | ring->name[DBGRING_NAME_MAX - 1] = 0; | |
58 | ring->ring_size = ring_sz; | |
59 | ring->wp = ring->rp = 0; | |
60 | ring->ring_buf = buf; | |
61 | ring->threshold = DBGRING_FLUSH_THRESHOLD(ring); | |
62 | ring->state = RING_SUSPEND; | |
63 | ring->rem_len = 0; | |
64 | ring->sched_pull = TRUE; | |
65 | DHD_DBG_RING_UNLOCK(ring->lock, flags); | |
66 | ||
67 | return BCME_OK; | |
68 | } | |
69 | ||
70 | void | |
71 | dhd_dbg_ring_deinit(dhd_pub_t *dhdp, dhd_dbg_ring_t *ring) | |
72 | { | |
73 | unsigned long flags = 0; | |
74 | DHD_DBG_RING_LOCK(ring->lock, flags); | |
75 | ring->id = 0; | |
76 | ring->name[0] = 0; | |
77 | ring->wp = ring->rp = 0; | |
78 | memset(&ring->stat, 0, sizeof(ring->stat)); | |
79 | ring->threshold = 0; | |
80 | ring->state = RING_STOP; | |
81 | DHD_DBG_RING_UNLOCK(ring->lock, flags); | |
82 | ||
83 | DHD_DBG_RING_LOCK_DEINIT(dhdp->osh, ring->lock); | |
84 | } | |
85 | ||
86 | void | |
87 | dhd_dbg_ring_sched_pull(dhd_dbg_ring_t *ring, uint32 pending_len, | |
88 | os_pullreq_t pull_fn, void *os_pvt, const int id) | |
89 | { | |
90 | unsigned long flags = 0; | |
91 | DHD_DBG_RING_LOCK(ring->lock, flags); | |
92 | /* if the current pending size is bigger than threshold and | |
93 | * threshold is set | |
94 | */ | |
95 | if (ring->threshold > 0 && | |
96 | (pending_len >= ring->threshold) && ring->sched_pull) { | |
97 | /* | |
98 | * Update the state and release the lock before calling | |
99 | * the pull_fn. Do not transfer control to other layers | |
100 | * with locks held. If the call back again calls into | |
101 | * the same layer fro this context, can lead to deadlock. | |
102 | */ | |
103 | ring->sched_pull = FALSE; | |
104 | DHD_DBG_RING_UNLOCK(ring->lock, flags); | |
105 | pull_fn(os_pvt, id); | |
106 | } else { | |
107 | DHD_DBG_RING_UNLOCK(ring->lock, flags); | |
108 | } | |
109 | } | |
110 | ||
111 | uint32 | |
112 | dhd_dbg_ring_get_pending_len(dhd_dbg_ring_t *ring) | |
113 | { | |
114 | uint32 pending_len = 0; | |
115 | unsigned long flags = 0; | |
116 | DHD_DBG_RING_LOCK(ring->lock, flags); | |
117 | if (ring->stat.written_bytes > ring->stat.read_bytes) { | |
118 | pending_len = ring->stat.written_bytes - ring->stat.read_bytes; | |
119 | } else if (ring->stat.written_bytes < ring->stat.read_bytes) { | |
120 | pending_len = PENDING_LEN_MAX - ring->stat.read_bytes + ring->stat.written_bytes; | |
121 | } else { | |
122 | pending_len = 0; | |
123 | } | |
124 | DHD_DBG_RING_UNLOCK(ring->lock, flags); | |
125 | ||
126 | return pending_len; | |
127 | } | |
128 | ||
129 | int | |
130 | dhd_dbg_ring_push(dhd_dbg_ring_t *ring, dhd_dbg_ring_entry_t *hdr, void *data) | |
131 | { | |
132 | unsigned long flags; | |
133 | uint32 w_len; | |
134 | uint32 avail_size; | |
135 | dhd_dbg_ring_entry_t *w_entry, *r_entry; | |
136 | ||
137 | if (!ring || !hdr || !data) { | |
138 | return BCME_BADARG; | |
139 | } | |
140 | ||
141 | DHD_DBG_RING_LOCK(ring->lock, flags); | |
142 | ||
143 | if (ring->state != RING_ACTIVE) { | |
144 | DHD_DBG_RING_UNLOCK(ring->lock, flags); | |
145 | return BCME_OK; | |
146 | } | |
147 | ||
148 | w_len = ENTRY_LENGTH(hdr); | |
149 | ||
150 | DHD_DBGIF(("%s: RING%d[%s] hdr->len=%u, w_len=%u, wp=%d, rp=%d, ring_start=0x%p;" | |
151 | " ring_size=%u\n", | |
152 | __FUNCTION__, ring->id, ring->name, hdr->len, w_len, ring->wp, ring->rp, | |
153 | ring->ring_buf, ring->ring_size)); | |
154 | ||
155 | if (w_len > ring->ring_size) { | |
156 | DHD_DBG_RING_UNLOCK(ring->lock, flags); | |
157 | DHD_ERROR(("%s: RING%d[%s] w_len=%u, ring_size=%u," | |
158 | " write size exceeds ring size !\n", | |
159 | __FUNCTION__, ring->id, ring->name, w_len, ring->ring_size)); | |
160 | return BCME_BUFTOOLONG; | |
161 | } | |
162 | /* Claim the space */ | |
163 | do { | |
164 | avail_size = DBG_RING_CHECK_WRITE_SPACE(ring->rp, ring->wp, ring->ring_size); | |
165 | if (avail_size <= w_len) { | |
166 | /* Prepare the space */ | |
167 | if (ring->rp <= ring->wp) { | |
168 | ring->tail_padded = TRUE; | |
169 | ring->rem_len = ring->ring_size - ring->wp; | |
170 | DHD_DBGIF(("%s: RING%d[%s] Insuffient tail space," | |
171 | " rp=%d, wp=%d, rem_len=%d, ring_size=%d," | |
172 | " avail_size=%d, w_len=%d\n", __FUNCTION__, | |
173 | ring->id, ring->name, ring->rp, ring->wp, | |
174 | ring->rem_len, ring->ring_size, avail_size, | |
175 | w_len)); | |
176 | ||
177 | /* 0 pad insufficient tail space */ | |
178 | memset((uint8 *)ring->ring_buf + ring->wp, 0, ring->rem_len); | |
179 | /* If read pointer is still at the beginning, make some room */ | |
180 | if (ring->rp == 0) { | |
181 | r_entry = (dhd_dbg_ring_entry_t *)((uint8 *)ring->ring_buf + | |
182 | ring->rp); | |
183 | ring->rp += ENTRY_LENGTH(r_entry); | |
184 | ring->stat.read_bytes += ENTRY_LENGTH(r_entry); | |
185 | DHD_DBGIF(("%s: rp at 0, move by one entry length" | |
186 | " (%u bytes)\n", | |
187 | __FUNCTION__, (uint32)ENTRY_LENGTH(r_entry))); | |
188 | } | |
189 | if (ring->rp == ring->wp) { | |
190 | ring->rp = 0; | |
191 | } | |
192 | ring->wp = 0; | |
193 | DHD_DBGIF(("%s: new rp=%u, wp=%u\n", | |
194 | __FUNCTION__, ring->rp, ring->wp)); | |
195 | } else { | |
196 | /* Not enough space for new entry, free some up */ | |
197 | r_entry = (dhd_dbg_ring_entry_t *)((uint8 *)ring->ring_buf + | |
198 | ring->rp); | |
199 | /* check bounds before incrementing read ptr */ | |
200 | if (ring->rp + ENTRY_LENGTH(r_entry) >= ring->ring_size) { | |
201 | DHD_ERROR(("%s: RING%d[%s] rp points out of boundary," | |
202 | "ring->wp=%u, ring->rp=%u, ring->ring_size=%d\n", | |
203 | __FUNCTION__, ring->id, ring->name, ring->wp, | |
204 | ring->rp, ring->ring_size)); | |
205 | ASSERT(0); | |
206 | DHD_DBG_RING_UNLOCK(ring->lock, flags); | |
207 | return BCME_BUFTOOSHORT; | |
208 | } | |
209 | ring->rp += ENTRY_LENGTH(r_entry); | |
210 | /* skip padding if there is one */ | |
211 | if (ring->tail_padded && | |
212 | ((ring->rp + ring->rem_len) == ring->ring_size)) { | |
213 | DHD_DBGIF(("%s: RING%d[%s] Found padding," | |
214 | " avail_size=%d, w_len=%d, set rp=0\n", | |
215 | __FUNCTION__, ring->id, ring->name, | |
216 | avail_size, w_len)); | |
217 | ring->rp = 0; | |
218 | ring->tail_padded = FALSE; | |
219 | ring->rem_len = 0; | |
220 | } | |
221 | ring->stat.read_bytes += ENTRY_LENGTH(r_entry); | |
222 | DHD_DBGIF(("%s: RING%d[%s] read_bytes=%d, wp=%d, rp=%d\n", | |
223 | __FUNCTION__, ring->id, ring->name, ring->stat.read_bytes, | |
224 | ring->wp, ring->rp)); | |
225 | } | |
226 | } else { | |
227 | break; | |
228 | } | |
229 | } while (TRUE); | |
230 | ||
231 | /* check before writing to the ring */ | |
232 | if (ring->wp + w_len >= ring->ring_size) { | |
233 | DHD_ERROR(("%s: RING%d[%s] wp pointed out of ring boundary, " | |
234 | "wp=%d, ring_size=%d, w_len=%u\n", __FUNCTION__, ring->id, | |
235 | ring->name, ring->wp, ring->ring_size, w_len)); | |
236 | ASSERT(0); | |
237 | DHD_DBG_RING_UNLOCK(ring->lock, flags); | |
238 | return BCME_BUFTOOLONG; | |
239 | } | |
240 | ||
241 | w_entry = (dhd_dbg_ring_entry_t *)((uint8 *)ring->ring_buf + ring->wp); | |
242 | /* header */ | |
243 | memcpy(w_entry, hdr, DBG_RING_ENTRY_SIZE); | |
244 | w_entry->len = hdr->len; | |
245 | /* payload */ | |
246 | memcpy((char *)w_entry + DBG_RING_ENTRY_SIZE, data, w_entry->len); | |
247 | /* update write pointer */ | |
248 | ring->wp += w_len; | |
249 | ||
250 | /* update statistics */ | |
251 | ring->stat.written_records++; | |
252 | ring->stat.written_bytes += w_len; | |
253 | DHD_DBGIF(("%s : RING%d[%s] written_records %d, written_bytes %d, read_bytes=%d," | |
254 | " ring->threshold=%d, wp=%d, rp=%d\n", __FUNCTION__, ring->id, ring->name, | |
255 | ring->stat.written_records, ring->stat.written_bytes, ring->stat.read_bytes, | |
256 | ring->threshold, ring->wp, ring->rp)); | |
257 | ||
258 | DHD_DBG_RING_UNLOCK(ring->lock, flags); | |
259 | return BCME_OK; | |
260 | } | |
261 | ||
262 | int | |
263 | dhd_dbg_ring_pull_single(dhd_dbg_ring_t *ring, void *data, uint32 buf_len, | |
264 | bool strip_header) | |
265 | { | |
266 | dhd_dbg_ring_entry_t *r_entry = NULL; | |
267 | uint32 rlen = 0; | |
268 | char *buf = NULL; | |
269 | ||
270 | if (!ring || !data || buf_len <= 0) { | |
271 | return 0; | |
272 | } | |
273 | ||
274 | /* pull from ring is allowed for inactive (suspended) ring | |
275 | * in case of ecounters only, this is because, for ecounters | |
276 | * when a trap occurs the ring is suspended and data is then | |
277 | * pulled to dump it to a file. For other rings if ring is | |
278 | * not in active state return without processing (as before) | |
279 | */ | |
280 | #ifndef EWP_ECNTRS_LOGGING | |
281 | if (ring->state != RING_ACTIVE) { | |
282 | return 0; | |
283 | } | |
284 | #endif /* EWP_ECNTRS_LOGGING */ | |
285 | ||
286 | if (ring->rp == ring->wp) { | |
287 | return 0; | |
288 | } | |
289 | ||
290 | DHD_DBGIF(("%s: RING%d[%s] buf_len=%u, wp=%d, rp=%d, ring_start=0x%p; ring_size=%u\n", | |
291 | __FUNCTION__, ring->id, ring->name, buf_len, ring->wp, ring->rp, | |
292 | ring->ring_buf, ring->ring_size)); | |
293 | ||
294 | r_entry = (dhd_dbg_ring_entry_t *)((uint8 *)ring->ring_buf + ring->rp); | |
295 | ||
296 | /* Boundary Check */ | |
297 | rlen = ENTRY_LENGTH(r_entry); | |
298 | if ((ring->rp + rlen) > ring->ring_size) { | |
299 | DHD_ERROR(("%s: entry len %d is out of boundary of ring size %d," | |
300 | " current ring %d[%s] - rp=%d\n", __FUNCTION__, rlen, | |
301 | ring->ring_size, ring->id, ring->name, ring->rp)); | |
302 | return 0; | |
303 | } | |
304 | ||
305 | if (strip_header) { | |
306 | rlen = r_entry->len; | |
307 | buf = (char *)r_entry + DBG_RING_ENTRY_SIZE; | |
308 | } else { | |
309 | rlen = ENTRY_LENGTH(r_entry); | |
310 | buf = (char *)r_entry; | |
311 | } | |
312 | if (rlen > buf_len) { | |
313 | DHD_ERROR(("%s: buf len %d is too small for entry len %d\n", | |
314 | __FUNCTION__, buf_len, rlen)); | |
315 | DHD_ERROR(("%s: ring %d[%s] - ring size=%d, wp=%d, rp=%d\n", | |
316 | __FUNCTION__, ring->id, ring->name, ring->ring_size, | |
317 | ring->wp, ring->rp)); | |
318 | ASSERT(0); | |
319 | return 0; | |
320 | } | |
321 | ||
322 | memcpy(data, buf, rlen); | |
323 | /* update ring context */ | |
324 | ring->rp += ENTRY_LENGTH(r_entry); | |
325 | /* don't pass wp but skip padding if there is one */ | |
326 | if (ring->rp != ring->wp && | |
327 | ring->tail_padded && ((ring->rp + ring->rem_len) == ring->ring_size)) { | |
328 | DHD_DBGIF(("%s: RING%d[%s] Found padding, rp=%d, wp=%d\n", | |
329 | __FUNCTION__, ring->id, ring->name, ring->rp, ring->wp)); | |
330 | ring->rp = 0; | |
331 | ring->tail_padded = FALSE; | |
332 | ring->rem_len = 0; | |
333 | } | |
334 | if (ring->rp >= ring->ring_size) { | |
335 | DHD_ERROR(("%s: RING%d[%s] rp pointed out of ring boundary," | |
336 | " rp=%d, ring_size=%d\n", __FUNCTION__, ring->id, | |
337 | ring->name, ring->rp, ring->ring_size)); | |
338 | ASSERT(0); | |
339 | return 0; | |
340 | } | |
341 | ring->stat.read_bytes += ENTRY_LENGTH(r_entry); | |
342 | DHD_DBGIF(("%s RING%d[%s]read_bytes %d, wp=%d, rp=%d\n", __FUNCTION__, | |
343 | ring->id, ring->name, ring->stat.read_bytes, ring->wp, ring->rp)); | |
344 | ||
345 | return rlen; | |
346 | } | |
347 | ||
348 | int | |
349 | dhd_dbg_ring_pull(dhd_dbg_ring_t *ring, void *data, uint32 buf_len, bool strip_hdr) | |
350 | { | |
351 | int32 r_len, total_r_len = 0; | |
352 | ||
353 | if (!ring || !data) | |
354 | return 0; | |
355 | ||
356 | if (ring->state != RING_ACTIVE) | |
357 | return 0; | |
358 | ||
359 | while (buf_len > 0) { | |
360 | r_len = dhd_dbg_ring_pull_single(ring, data, buf_len, strip_hdr); | |
361 | if (r_len == 0) | |
362 | break; | |
363 | data = (uint8 *)data + r_len; | |
364 | buf_len -= r_len; | |
365 | total_r_len += r_len; | |
366 | } | |
367 | ||
368 | return total_r_len; | |
369 | } | |
370 | ||
371 | int | |
372 | dhd_dbg_ring_config(dhd_dbg_ring_t *ring, int log_level, uint32 threshold) | |
373 | { | |
374 | unsigned long flags = 0; | |
375 | if (!ring) | |
376 | return BCME_BADADDR; | |
377 | ||
378 | if (ring->state == RING_STOP) | |
379 | return BCME_UNSUPPORTED; | |
380 | ||
381 | DHD_DBG_RING_LOCK(ring->lock, flags); | |
382 | ||
383 | if (log_level == 0) | |
384 | ring->state = RING_SUSPEND; | |
385 | else | |
386 | ring->state = RING_ACTIVE; | |
387 | ||
388 | ring->log_level = log_level; | |
389 | ring->threshold = MIN(threshold, DBGRING_FLUSH_THRESHOLD(ring)); | |
390 | ||
391 | DHD_DBG_RING_UNLOCK(ring->lock, flags); | |
392 | ||
393 | return BCME_OK; | |
394 | } | |
395 | ||
396 | void | |
397 | dhd_dbg_ring_start(dhd_dbg_ring_t *ring) | |
398 | { | |
399 | if (!ring) | |
400 | return; | |
401 | ||
402 | /* Initialize the information for the ring */ | |
403 | ring->state = RING_SUSPEND; | |
404 | ring->log_level = 0; | |
405 | ring->rp = ring->wp = 0; | |
406 | ring->threshold = 0; | |
407 | memset(&ring->stat, 0, sizeof(struct ring_statistics)); | |
408 | memset(ring->ring_buf, 0, ring->ring_size); | |
409 | } |