1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25
26 #include <mdb/mdb_modapi.h>
27 #include <generic_cpu/gcpu.h>
28 #include <sys/cpu_module_impl.h>
29 #include <sys/cpu_module_ms_impl.h>
30
31 typedef struct cmi_hdl_impl {
32 enum cmi_hdl_class cmih_class; /* Handle nature */
33 struct cmi_hdl_ops *cmih_ops; /* Operations vector */
34 uint_t cmih_chipid; /* Chipid of cpu resource */
35 uint_t cmih_procnodeid; /* Nodeid of cpu resource */
36 uint_t cmih_coreid; /* Core within die */
37 uint_t cmih_strandid; /* Thread within core */
38 uint_t cmih_procnodes_per_pkg; /* Nodes in a processor */
39 boolean_t cmih_mstrand; /* cores are multithreaded */
40 volatile uint32_t *cmih_refcntp; /* Reference count pointer */
41 uint64_t cmih_msrsrc; /* MSR data source flags */
42 void *cmih_hdlpriv; /* cmi_hw.c private data */
43 void *cmih_spec; /* cmi_hdl_{set,get}_specific */
44 void *cmih_cmi; /* cpu mod control structure */
45 void *cmih_cmidata; /* cpu mod private data */
46 const struct cmi_mc_ops *cmih_mcops; /* Memory-controller ops */
47 void *cmih_mcdata; /* Memory-controller data */
48 uint64_t cmih_flags;
49 uint16_t cmih_smbiosid; /* SMBIOS Type 4 struct ID */
50 uint_t cmih_smb_chipid; /* smbios chipid */
51 nvlist_t *cmih_smb_bboard; /* smbios bboard */
52 } cmi_hdl_impl_t;
53
54 typedef struct cmi_hdl_ent {
55 volatile uint32_t cmae_refcnt;
56 cmi_hdl_impl_t *cmae_hdlp;
57 } cmi_hdl_ent_t;
58
59 typedef struct cmi {
60 struct cmi *cmi_next;
61 struct cmi *cmi_prev;
62 const cmi_ops_t *cmi_ops;
63 struct modctl *cmi_modp;
64 uint_t cmi_refcnt;
65 } cmi_t;
66
67 typedef struct cms {
68 struct cms *cms_next;
69 struct cms *cms_prev;
70 const cms_ops_t *cms_ops;
71 struct modctl *cms_modp;
72 uint_t cms_refcnt;
73 } cms_t;
74
75 struct cms_ctl {
76 cms_t *cs_cms;
77 void *cs_cmsdata;
78 };
79
80 #define CMI_MAX_CHIPID_NBITS 6 /* max chipid of 63 */
81
82 #define CMI_MAX_CHIPID ((1 << (CMI_MAX_CHIPID_NBITS)) - 1)
83 #define CMI_MAX_CORES_PER_CHIP(cbits) (1 << (cbits))
84 #define CMI_MAX_COREID(cbits) ((1 << (cbits)) - 1)
85 #define CMI_MAX_STRANDS_PER_CORE(sbits) (1 << (sbits))
86 #define CMI_MAX_STRANDID(sbits) ((1 << (sbits)) - 1)
87 #define CMI_MAX_STRANDS_PER_CHIP(cbits, sbits) \
88 (CMI_MAX_CORES_PER_CHIP(cbits) * CMI_MAX_STRANDS_PER_CORE(sbits))
89
90 #define CMI_CHIPID_ARR_SZ (1 << CMI_MAX_CHIPID_NBITS)
91
92 struct cmih_walk_state {
93 int chipid, coreid, strandid; /* currently visited cpu */
94 cmi_hdl_ent_t *chip_tab[CMI_CHIPID_ARR_SZ];
95 uint_t core_nbits;
96 uint_t strand_nbits;
97 };
98
99 /*
100 * Advance the <chipid,coreid,strandid> tuple to the next strand entry
101 * Return true upon sucessful result. Otherwise return false if already reach
102 * the highest strand.
103 */
104 static boolean_t
105 cmih_ent_next(struct cmih_walk_state *wsp)
106 {
107 uint_t carry = 0;
108
109 /* Check for end of the table */
110 if (wsp->chipid >= CMI_MAX_CHIPID &&
111 wsp->coreid >= CMI_MAX_COREID(wsp->core_nbits) &&
112 wsp->strandid >= CMI_MAX_STRANDID(wsp->strand_nbits))
113 return (B_FALSE);
114
115 /* increment the strand id */
116 wsp->strandid++;
117 carry = wsp->strandid >> wsp->strand_nbits;
118 wsp->strandid = wsp->strandid & CMI_MAX_STRANDID(wsp->strand_nbits);
119 if (carry == 0)
120 return (B_TRUE);
121
122 /* increment the core id */
123 wsp->coreid++;
124 carry = wsp->coreid >> wsp->core_nbits;
125 wsp->coreid = wsp->coreid & CMI_MAX_COREID(wsp->core_nbits);
126 if (carry == 0)
127 return (B_TRUE);
128
129 /* increment the chip id */
130 wsp->chipid = (wsp->chipid + 1) & (CMI_MAX_CHIPID);
131
132 return (B_TRUE);
133 }
134
135 /*
136 * Lookup for the hdl entry of a given <chip,core,strand> tuple
137 */
138 static cmi_hdl_ent_t *
139 cmih_ent_lookup(struct cmih_walk_state *wsp)
140 {
141 if (wsp == NULL || wsp->chip_tab[wsp->chipid] == NULL)
142 return (NULL); /* chip is not present */
143
144 return (wsp->chip_tab[wsp->chipid] +
145 (((wsp->coreid & CMI_MAX_COREID(wsp->core_nbits)) <<
146 wsp->strand_nbits) |
147 ((wsp->strandid) & CMI_MAX_STRANDID(wsp->strand_nbits))));
148 }
149
150 /* forward decls */
151 static void
152 cmih_walk_fini(mdb_walk_state_t *wsp);
153
154 static int
155 cmih_walk_init(mdb_walk_state_t *wsp)
156 {
157 int i;
158 ssize_t sz;
159 struct cmih_walk_state *awsp;
160 void *pg;
161 cmi_hdl_ent_t *ent;
162
163 if (wsp->walk_addr != NULL) {
164 mdb_warn("cmihdl is a global walker\n");
165 return (WALK_ERR);
166 }
167
168 wsp->walk_data = awsp =
169 mdb_zalloc(sizeof (struct cmih_walk_state), UM_SLEEP);
170
171 /* read the number of core bits and strand bits */
172 if (mdb_readvar(&awsp->core_nbits, "cmi_core_nbits") == -1) {
173 mdb_warn("read of cmi_core_nbits failed");
174 mdb_free(wsp->walk_data, sizeof (struct cmih_walk_state));
175 wsp->walk_data = NULL;
176 return (WALK_ERR);
177 }
178 if (mdb_readvar(&awsp->strand_nbits, "cmi_strand_nbits") == -1) {
179 mdb_warn("read of cmi_strand_nbits failed");
180 mdb_free(wsp->walk_data, sizeof (struct cmih_walk_state));
181 wsp->walk_data = NULL;
182 return (WALK_ERR);
183 }
184
185 /* table of chipid entries */
186 if ((sz = mdb_readvar(&awsp->chip_tab, "cmi_chip_tab")) == -1) {
187 mdb_warn("read of cmi_chip_tab failed");
188 mdb_free(wsp->walk_data, sizeof (struct cmih_walk_state));
189 wsp->walk_data = NULL;
190 return (WALK_ERR);
191 } else if (sz < sizeof (awsp->chip_tab)) {
192 mdb_warn("Unexpected cmi_chip_tab size (exp=%ld, actual=%ld)",
193 sizeof (awsp->chip_tab), sz);
194 mdb_free(wsp->walk_data, sizeof (struct cmih_walk_state));
195 wsp->walk_data = NULL;
196 return (WALK_ERR);
197 }
198
199 /* read the per-chip table that contains all strands of the chip */
200 sz = CMI_MAX_STRANDS_PER_CHIP(awsp->core_nbits, awsp->strand_nbits) *
201 sizeof (cmi_hdl_ent_t);
202 for (i = 0; i < CMI_CHIPID_ARR_SZ; i++) {
203 if (awsp->chip_tab[i] == NULL)
204 continue; /* this chip(i) is not present */
205 pg = mdb_alloc(sz, UM_SLEEP);
206 if (mdb_vread(pg, sz, (uintptr_t)awsp->chip_tab[i]) != sz) {
207 mdb_warn("read of cmi_hdl(%i) array at 0x%p failed",
208 i, awsp->chip_tab[i]);
209 mdb_free(pg, sz);
210 cmih_walk_fini(wsp);
211 return (WALK_ERR);
212 }
213 awsp->chip_tab[i] = pg;
214 }
215
216 /* Look up the hdl of the first strand <0,0,0> */
217 wsp->walk_addr = NULL;
218 if ((ent = cmih_ent_lookup(awsp)) != NULL)
219 wsp->walk_addr = (uintptr_t)ent->cmae_hdlp;
220
221 return (WALK_NEXT);
222 }
223
224 static int
225 cmih_walk_step(mdb_walk_state_t *wsp)
226 {
227 struct cmih_walk_state *awsp = wsp->walk_data;
228 uintptr_t addr = NULL;
229 cmi_hdl_impl_t hdl;
230 cmi_hdl_ent_t *ent;
231 int rv;
232
233 if ((ent = cmih_ent_lookup(awsp)) != NULL)
234 addr = (uintptr_t)ent->cmae_hdlp;
235 if (wsp->walk_addr == NULL || addr == NULL)
236 return (cmih_ent_next(awsp) ? WALK_NEXT : WALK_DONE);
237
238 if (mdb_vread(&hdl, sizeof (hdl), addr) != sizeof (hdl)) {
239 mdb_warn("read of handle at 0x%p failed", addr);
240 return (WALK_DONE);
241 }
242
243 if ((rv = wsp->walk_callback(addr, (void *)&hdl,
244 wsp->walk_cbdata)) != WALK_NEXT)
245 return (rv);
246
247 return (cmih_ent_next(awsp) ? WALK_NEXT : WALK_DONE);
248 }
249
250 static void
251 cmih_walk_fini(mdb_walk_state_t *wsp)
252 {
253 struct cmih_walk_state *awsp = wsp->walk_data;
254
255 if (awsp != NULL) {
256 int i;
257 int max_strands = CMI_MAX_STRANDS_PER_CHIP(awsp->core_nbits,
258 awsp->strand_nbits);
259 for (i = 0; i < CMI_CHIPID_ARR_SZ; i++) {
260 /* free the per-chip table */
261 if (awsp->chip_tab[i] != NULL) {
262 mdb_free((void *)awsp->chip_tab[i],
263 max_strands * sizeof (cmi_hdl_ent_t));
264 awsp->chip_tab[i] = NULL;
265 }
266 }
267 mdb_free(wsp->walk_data, sizeof (struct cmih_walk_state));
268 wsp->walk_data = NULL;
269 }
270 }
271
272 struct cmihdl_cb {
273 int mod_cpuid;
274 int mod_chipid;
275 int mod_coreid;
276 int mod_strandid;
277 uintptr_t mod_hdladdr;
278 };
279
280 static int
281 cmihdl_cb(uintptr_t addr, const void *arg, void *data)
282 {
283 cmi_hdl_impl_t *hdl = (cmi_hdl_impl_t *)arg;
284 struct cmihdl_cb *cbp = data;
285 cpu_t *cp;
286 int rv;
287
288 if (cbp->mod_cpuid != -1) {
289 cp = mdb_alloc(sizeof (cpu_t), UM_SLEEP);
290 if (mdb_vread(cp, sizeof (cpu_t),
291 (uintptr_t)hdl->cmih_hdlpriv) != sizeof (cpu_t)) {
292 mdb_warn("Read of cpu_t at 0x%p failed",
293 hdl->cmih_hdlpriv);
294 mdb_free(cp, sizeof (cpu_t));
295 return (WALK_ERR);
296 }
297
298 if (cp->cpu_id == cbp->mod_cpuid) {
299 cbp->mod_hdladdr = addr;
300 rv = WALK_DONE;
301 } else {
302 rv = WALK_NEXT;
303 }
304
305 mdb_free(cp, sizeof (cpu_t));
306 return (rv);
307 } else {
308 if (hdl->cmih_chipid == cbp->mod_chipid &&
309 hdl->cmih_coreid == cbp->mod_coreid &&
310 hdl->cmih_strandid == cbp->mod_strandid) {
311 cbp->mod_hdladdr = addr;
312 return (WALK_DONE);
313 } else {
314 return (WALK_NEXT);
315 }
316 }
317 }
318
319 static int
320 cmihdl_disp(uintptr_t addr, cmi_hdl_impl_t *hdl)
321 {
322 struct cms_ctl cmsctl; /* 16 bytes max */
323 struct modctl cmimodc, cmsmodc; /* 288 bytes max */
324 cmi_t cmi; /* 40 bytes max */
325 cms_t cms; /* 40 bytes max */
326 cpu_t *cp;
327 char cmimodnm[25], cmsmodnm[25]; /* 50 bytes */
328 char cpuidstr[4], hwidstr[16];
329 int native = hdl->cmih_class == CMI_HDL_NATIVE;
330 uint32_t refcnt;
331
332 cmimodnm[0] = cmsmodnm[0] = '-';
333 cmimodnm[1] = cmsmodnm[1] = '\0';
334
335 if (hdl->cmih_cmi != NULL) {
336 if (mdb_vread(&cmi, sizeof (cmi_t),
337 (uintptr_t)hdl->cmih_cmi) != sizeof (cmi)) {
338 mdb_warn("Read of cmi_t at 0x%p failed",
339 hdl->cmih_cmi);
340 return (0);
341 }
342
343 if (cmi.cmi_modp != NULL) {
344 if (mdb_vread(&cmimodc, sizeof (struct modctl),
345 (uintptr_t)cmi.cmi_modp) != sizeof (cmimodc)) {
346 mdb_warn("Read of modctl at 0x%p failed",
347 cmi.cmi_modp);
348 return (0);
349 }
350
351 if (mdb_readstr(cmimodnm, sizeof (cmimodnm),
352 (uintptr_t)cmimodc.mod_modname) == -1) {
353 mdb_warn("Read of cmi module name at 0x%p "
354 "failed", cmimodc.mod_modname);
355 return (0);
356 }
357 }
358 }
359
360 if (hdl->cmih_spec != NULL) {
361 if (mdb_vread(&cmsctl, sizeof (struct cms_ctl),
362 (uintptr_t)hdl->cmih_spec) != sizeof (cmsctl)) {
363 mdb_warn("Read of struct cms_ctl at 0x%p failed",
364 hdl->cmih_spec);
365 return (0);
366 }
367
368 if (mdb_vread(&cms, sizeof (cms_t),
369 (uintptr_t)cmsctl.cs_cms) != sizeof (cms)) {
370 mdb_warn("Read of cms_t at 0x%p failed", cmsctl.cs_cms);
371 return (0);
372 }
373
374 if (cms.cms_modp != NULL) {
375 if (mdb_vread(&cmsmodc, sizeof (struct modctl),
376 (uintptr_t)cms.cms_modp) != sizeof (cmsmodc)) {
377 mdb_warn("Read of modctl at 0x%p failed",
378 cms.cms_modp);
379 return (0);
380 }
381
382 if (mdb_readstr(cmsmodnm, sizeof (cmsmodnm),
383 (uintptr_t)cmsmodc.mod_modname) == -1) {
384 mdb_warn("Read of cms module name at 0x%p "
385 "failed", cmsmodc.mod_modname);
386 return (0);
387 }
388 }
389 }
390
391 if (mdb_vread(&refcnt, sizeof (uint32_t),
392 (uintptr_t)hdl->cmih_refcntp) != sizeof (uint32_t)) {
393 mdb_warn("Read of reference count for hdl 0x%p failed", hdl);
394 return (0);
395 }
396
397 if (native) {
398 cp = mdb_alloc(sizeof (cpu_t), UM_SLEEP);
399
400 if (mdb_vread(cp, sizeof (cpu_t),
401 (uintptr_t)hdl->cmih_hdlpriv) != sizeof (cpu_t)) {
402 mdb_free(cp, sizeof (cpu_t));
403 mdb_warn("Read of cpu_t at 0x%p failed",
404 hdl->cmih_hdlpriv);
405 return (0);
406 }
407 }
408
409 if (native) {
410 (void) mdb_snprintf(cpuidstr, sizeof (cpuidstr), "%d",
411 cp->cpu_id);
412 } else {
413 (void) mdb_snprintf(cpuidstr, sizeof (cpuidstr), "-");
414 }
415
416 (void) mdb_snprintf(hwidstr, sizeof (hwidstr), "%d/%d/%d",
417 hdl->cmih_chipid, hdl->cmih_coreid, hdl->cmih_strandid);
418
419 mdb_printf("%16lx %3d %3s %8s %3s %2s %-13s %-24s\n", addr,
420 refcnt, cpuidstr, hwidstr, hdl->cmih_mstrand ? "M" : "S",
421 hdl->cmih_mcops ? "Y" : "N", cmimodnm, cmsmodnm);
422
423 if (native)
424 mdb_free(cp, sizeof (cpu_t));
425
426 return (1);
427 }
428
429 #define HDRFMT "%-16s %3s %3s %8s %3s %2s %-13s %-24s\n"
430
431 static int
432 cmihdl(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
433 {
434 struct cmihdl_cb cb;
435 cmi_hdl_impl_t *hdl;
436
437 /*
438 * If an address is given it must be that of a cmi handle.
439 * Otherwise if the user has specified -c <cpuid> or
440 * -c <chipid/coreid/strandid> we will lookup a matching handle.
441 * Otherwise we'll walk and callback to this dcmd.
442 */
443 if (!(flags & DCMD_ADDRSPEC)) {
444 char *p, *buf;
445 int len;
446
447 if (argc == 0)
448 return (mdb_walk_dcmd("cmihdl", "cmihdl", argc,
449 argv) == 0 ? DCMD_OK : DCMD_ERR);
450
451
452 if (mdb_getopts(argc, argv,
453 'c', MDB_OPT_STR, &p,
454 NULL) != argc)
455 return (DCMD_USAGE);
456
457 if ((len = strlen(p)) == 0) {
458 return (DCMD_USAGE);
459 } else {
460 buf = mdb_alloc(len + 1, UM_SLEEP);
461 strcpy(buf, p);
462 }
463
464 cb.mod_cpuid = cb.mod_chipid = cb.mod_coreid =
465 cb.mod_strandid = -1;
466
467 if ((p = strchr(buf, '/')) == NULL) {
468 /* Native cpuid */
469 cb.mod_cpuid = (int)mdb_strtoull(buf);
470 } else {
471 /* Comma-separated triplet chip,core,strand. */
472 char *q = buf;
473
474 *p = '\0';
475 cb.mod_chipid = (int)mdb_strtoull(q);
476
477 if ((q = p + 1) >= buf + len ||
478 (p = strchr(q, '/')) == NULL) {
479 mdb_free(buf, len);
480 return (DCMD_USAGE);
481 }
482
483 *p = '\0';
484 cb.mod_coreid = (int)mdb_strtoull(q);
485
486 if ((q = p + 1) >= buf + len) {
487 mdb_free(buf, len);
488 return (DCMD_USAGE);
489 }
490
491 cb.mod_strandid = (int)mdb_strtoull(q);
492 }
493
494 mdb_free(buf, len);
495
496 cb.mod_hdladdr = NULL;
497 if (mdb_walk("cmihdl", cmihdl_cb, &cb) == -1) {
498 mdb_warn("cmi_hdl walk failed\n");
499 return (DCMD_ERR);
500 }
501
502 if (cb.mod_hdladdr == NULL) {
503 if (cb.mod_cpuid != -1) {
504 mdb_warn("No handle found for cpuid %d\n",
505 cb.mod_cpuid);
506 } else {
507
508 mdb_warn("No handle found for chip %d "
509 "core %d strand %d\n", cb.mod_chipid,
510 cb.mod_coreid, cb.mod_strandid);
511 }
512 return (DCMD_ERR);
513 }
514
515 addr = cb.mod_hdladdr;
516 }
517
518 if (DCMD_HDRSPEC(flags)) {
519 char ul[] = "----------------------------";
520 char *p = ul + sizeof (ul) - 1;
521
522 mdb_printf(HDRFMT HDRFMT,
523 "HANDLE", "REF", "CPU", "CH/CR/ST", "CMT", "MC",
524 "MODULE", "MODEL-SPECIFIC",
525 p - 16, p - 3, p - 3, p - 8, p - 3, p - 2, p - 13, p - 24);
526 }
527
528 hdl = mdb_alloc(sizeof (cmi_hdl_impl_t), UM_SLEEP);
529
530 if (mdb_vread(hdl, sizeof (cmi_hdl_impl_t), addr) !=
531 sizeof (cmi_hdl_impl_t)) {
532 mdb_free(hdl, sizeof (cmi_hdl_impl_t));
533 mdb_warn("Read of cmi handle at 0x%p failed", addr);
534 return (DCMD_ERR);
535 }
536
537 if (!cmihdl_disp(addr, hdl)) {
538 mdb_free(hdl, sizeof (cmi_hdl_impl_t));
539 return (DCMD_ERR);
540 }
541
542 mdb_free(hdl, sizeof (cmi_hdl_impl_t));
543
544 return (DCMD_OK);
545 }
546
547 /*ARGSUSED*/
548 static int
549 gcpu_mpt_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
550 {
551 static const char *const whatstrs[] = {
552 "ntv-cyc-poll", /* GCPU_MPT_WHAT_CYC_ERR */
553 "poll-poked", /* GCPU_MPT_WHAT_POKE_ERR */
554 "unfaulting", /* GCPU_MPT_WHAT_UNFAULTING */
555 "#MC", /* GCPU_MPT_WHAT_MC_ERR */
556 "CMCI-int", /* GCPU_MPT_WHAT_CMCI_ERR */
557 "xpv-virq-nrec", /* GCPU_MPT_WHAT_XPV_VIRQ */
558 "xpv-virq-lgout", /* GCPU_MPT_WHAT_XPV_VIRQ_LOGOUT */
559 };
560
561 gcpu_poll_trace_t mpt;
562 const char *what;
563
564 if (argc != 0 || !(flags & DCMD_ADDRSPEC))
565 return (DCMD_USAGE);
566
567 if (mdb_vread(&mpt, sizeof (mpt), addr) != sizeof (mpt)) {
568 mdb_warn("failed to read gcpu_poll_trace_t at 0x%p", addr);
569 return (DCMD_ERR);
570 }
571
572 if (DCMD_HDRSPEC(flags)) {
573 mdb_printf("%<u>%?s%</u> %<u>%?s%</u> %<u>%15s%</u> "
574 "%<u>%4s%</u>\n", "ADDR", "WHEN", "WHAT", "NERR");
575 }
576
577 if (mpt.mpt_what < sizeof (whatstrs) / sizeof (char *))
578 what = whatstrs[mpt.mpt_what];
579 else
580 what = "???";
581
582 mdb_printf("%?p %?p %15s %4u\n", addr, mpt.mpt_when, what,
583 mpt.mpt_nerr);
584
585 return (DCMD_OK);
586 }
587
588 typedef struct mptwalk_data {
589 uintptr_t mw_traceaddr;
590 gcpu_poll_trace_t *mw_trace;
591 size_t mw_tracesz;
592 uint_t mw_tracenent;
593 uint_t mw_curtrace;
594 } mptwalk_data_t;
595
596 static int
597 gcpu_mptwalk_init(mdb_walk_state_t *wsp)
598 {
599 gcpu_poll_trace_t *mpt;
600 mptwalk_data_t *mw;
601 GElf_Sym sym;
602 uint_t nent, i;
603 hrtime_t latest;
604
605 if (wsp->walk_addr == NULL) {
606 mdb_warn("the address of a poll trace array must be "
607 "specified\n");
608 return (WALK_ERR);
609 }
610
611 if (mdb_lookup_by_name("gcpu_poll_trace_nent", &sym) < 0 ||
612 sym.st_size != sizeof (uint_t) || mdb_vread(&nent, sizeof (uint_t),
613 sym.st_value) != sizeof (uint_t)) {
614 mdb_warn("failed to read gcpu_poll_trace_nent from kernel");
615 return (WALK_ERR);
616 }
617
618 mw = mdb_alloc(sizeof (mptwalk_data_t), UM_SLEEP);
619 mw->mw_traceaddr = wsp->walk_addr;
620 mw->mw_tracenent = nent;
621 mw->mw_tracesz = nent * sizeof (gcpu_poll_trace_t);
622 mw->mw_trace = mdb_alloc(mw->mw_tracesz, UM_SLEEP);
623
624 if (mdb_vread(mw->mw_trace, mw->mw_tracesz, wsp->walk_addr) !=
625 mw->mw_tracesz) {
626 mdb_free(mw->mw_trace, mw->mw_tracesz);
627 mdb_free(mw, sizeof (mptwalk_data_t));
628 mdb_warn("failed to read poll trace array from kernel");
629 return (WALK_ERR);
630 }
631
632 latest = 0;
633 mw->mw_curtrace = 0;
634 for (mpt = mw->mw_trace, i = 0; i < mw->mw_tracenent; i++, mpt++) {
635 if (mpt->mpt_when > latest) {
636 latest = mpt->mpt_when;
637 mw->mw_curtrace = i;
638 }
639 }
640
641 if (latest == 0) {
642 mdb_free(mw->mw_trace, mw->mw_tracesz);
643 mdb_free(mw, sizeof (mptwalk_data_t));
644 return (WALK_DONE); /* trace array is empty */
645 }
646
647 wsp->walk_data = mw;
648
649 return (WALK_NEXT);
650 }
651
652 static int
653 gcpu_mptwalk_step(mdb_walk_state_t *wsp)
654 {
655 mptwalk_data_t *mw = wsp->walk_data;
656 gcpu_poll_trace_t *thismpt, *prevmpt;
657 int prev, rv;
658
659 thismpt = &mw->mw_trace[mw->mw_curtrace];
660
661 rv = wsp->walk_callback(mw->mw_traceaddr + (mw->mw_curtrace *
662 sizeof (gcpu_poll_trace_t)), thismpt, wsp->walk_cbdata);
663
664 if (rv != WALK_NEXT)
665 return (rv);
666
667 prev = (mw->mw_curtrace - 1) % mw->mw_tracenent;
668 prevmpt = &mw->mw_trace[prev];
669
670 if (prevmpt->mpt_when == 0 || prevmpt->mpt_when > thismpt->mpt_when)
671 return (WALK_DONE);
672
673 mw->mw_curtrace = prev;
674
675 return (WALK_NEXT);
676 }
677
678 static void
679 gcpu_mptwalk_fini(mdb_walk_state_t *wsp)
680 {
681 mptwalk_data_t *mw = wsp->walk_data;
682
683 mdb_free(mw->mw_trace, mw->mw_tracesz);
684 mdb_free(mw, sizeof (mptwalk_data_t));
685 }
686
687 static const mdb_dcmd_t dcmds[] = {
688 { "cmihdl", ": -c <cpuid>|<chip,core,strand> ",
689 "dump a cmi_handle_t", cmihdl },
690 { "gcpu_poll_trace", ":", "dump a poll trace buffer", gcpu_mpt_dump },
691 { NULL }
692 };
693
694 static const mdb_walker_t walkers[] = {
695 { "cmihdl", "walks cpu module interface handle list",
696 cmih_walk_init, cmih_walk_step, cmih_walk_fini, NULL },
697 { "gcpu_poll_trace", "walks poll trace buffers in reverse "
698 "chronological order", gcpu_mptwalk_init, gcpu_mptwalk_step,
699 gcpu_mptwalk_fini, NULL },
700 { NULL }
701 };
702
703 static const mdb_modinfo_t modinfo = { MDB_API_VERSION, dcmds, walkers };
704
705 const mdb_modinfo_t *
706 _mdb_init(void)
707 {
708 return (&modinfo);
709 }