/
acpicpu.c
1279 lines (1085 loc) · 33.1 KB
/
acpicpu.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* $OpenBSD: acpicpu.c,v 1.91 2022/01/09 05:42:37 jsg Exp $ */
/*
* Copyright (c) 2005 Marco Peereboom <marco@openbsd.org>
* Copyright (c) 2015 Philip Guenther <guenther@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/kernel.h> /* for tick */
#include <sys/signalvar.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/atomic.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/cpufunc.h>
#include <machine/specialreg.h>
#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>
#include <dev/acpi/acpidev.h>
#include <dev/acpi/amltypes.h>
#include <dev/acpi/dsdt.h>
#include <sys/sensors.h>
int acpicpu_match(struct device *, void *, void *);
void acpicpu_attach(struct device *, struct device *, void *);
int acpicpu_notify(struct aml_node *, int, void *);
void acpicpu_setperf(int);
void acpicpu_setperf_ppc_change(struct acpicpu_pss *, int);
#define ACPI_STATE_C0 0x00
#define ACPI_STATE_C1 0x01
#define ACPI_STATE_C2 0x02
#define ACPI_STATE_C3 0x03
#define ACPI_PDC_REVID 0x1
#define ACPI_PDC_SMP 0xa
#define ACPI_PDC_MSR 0x1
/* _PDC/_OSC Intel capabilities flags */
#define ACPI_PDC_P_FFH 0x0001
#define ACPI_PDC_C_C1_HALT 0x0002
#define ACPI_PDC_T_FFH 0x0004
#define ACPI_PDC_SMP_C1PT 0x0008
#define ACPI_PDC_SMP_C2C3 0x0010
#define ACPI_PDC_SMP_P_SWCOORD 0x0020
#define ACPI_PDC_SMP_C_SWCOORD 0x0040
#define ACPI_PDC_SMP_T_SWCOORD 0x0080
#define ACPI_PDC_C_C1_FFH 0x0100
#define ACPI_PDC_C_C2C3_FFH 0x0200
/* reserved 0x0400 */
#define ACPI_PDC_P_HWCOORD 0x0800
#define ACPI_PDC_PPC_NOTIFY 0x1000
#define CST_METH_HALT 0
#define CST_METH_IO_HALT 1
#define CST_METH_MWAIT 2
#define CST_METH_GAS_IO 3
/* flags on Intel's FFH mwait method */
#define CST_FLAG_MWAIT_HW_COORD 0x1
#define CST_FLAG_MWAIT_BM_AVOIDANCE 0x2
#define CST_FLAG_FALLBACK 0x4000 /* fallback for broken _CST */
#define CST_FLAG_SKIP 0x8000 /* state is worse choice */
#define FLAGS_MWAIT_ONLY 0x02
#define FLAGS_BMCHECK 0x04
#define FLAGS_NOTHROTTLE 0x08
#define FLAGS_NOPSS 0x10
#define FLAGS_NOPCT 0x20
#define CPU_THT_EN (1L << 4)
#define CPU_MAXSTATE(sc) (1L << (sc)->sc_duty_wid)
#define CPU_STATE(sc,pct) ((pct * CPU_MAXSTATE(sc) / 100) << (sc)->sc_duty_off)
#define CPU_STATEMASK(sc) ((CPU_MAXSTATE(sc) - 1) << (sc)->sc_duty_off)
#define ACPI_MAX_C2_LATENCY 100
#define ACPI_MAX_C3_LATENCY 1000
#define CSD_COORD_SW_ALL 0xFC
#define CSD_COORD_SW_ANY 0xFD
#define CSD_COORD_HW_ALL 0xFE
/* Make sure throttling bits are valid,a=addr,o=offset,w=width */
#define valid_throttle(o,w,a) (a && w && (o+w)<=31 && (o>4 || (o+w)<=4))
struct acpi_cstate
{
SLIST_ENTRY(acpi_cstate) link;
u_short state;
short method; /* CST_METH_* */
u_short flags; /* CST_FLAG_* */
u_short latency;
int power;
uint64_t address; /* or mwait hint */
};
unsigned long cst_stats[4] = { 0 };
struct acpicpu_softc {
struct device sc_dev;
int sc_cpu;
int sc_duty_wid;
int sc_duty_off;
uint32_t sc_pblk_addr;
int sc_pblk_len;
int sc_flags;
unsigned long sc_prev_sleep;
unsigned long sc_last_itime;
struct cpu_info *sc_ci;
SLIST_HEAD(,acpi_cstate) sc_cstates;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
struct acpi_softc *sc_acpi;
struct aml_node *sc_devnode;
int sc_pss_len; /* XXX */
int sc_ppc;
int sc_level;
struct acpicpu_pss *sc_pss;
size_t sc_pssfulllen;
struct acpicpu_pct sc_pct;
/* save compensation for pct access for lying bios' */
uint32_t sc_pct_stat_as;
uint32_t sc_pct_ctrl_as;
uint32_t sc_pct_stat_len;
uint32_t sc_pct_ctrl_len;
/*
* XXX: _PPC Change listener
* PPC changes can occur when for example a machine is disconnected
* from AC power and can no longer support the highest frequency or
* voltage when driven from the battery.
* Should probably be reimplemented as a list for now we assume only
* one listener
*/
void (*sc_notify)(struct acpicpu_pss *, int);
};
void acpicpu_add_cstatepkg(struct aml_value *, void *);
void acpicpu_add_cdeppkg(struct aml_value *, void *);
int acpicpu_getppc(struct acpicpu_softc *);
int acpicpu_getpct(struct acpicpu_softc *);
int acpicpu_getpss(struct acpicpu_softc *);
int acpicpu_getcst(struct acpicpu_softc *);
void acpicpu_getcst_from_fadt(struct acpicpu_softc *);
void acpicpu_print_one_cst(struct acpi_cstate *_cx);
void acpicpu_print_cst(struct acpicpu_softc *_sc);
void acpicpu_add_cstate(struct acpicpu_softc *_sc, int _state, int _method,
int _flags, int _latency, int _power, uint64_t _address);
void acpicpu_set_pdc(struct acpicpu_softc *);
void acpicpu_idle(void);
#if 0
void acpicpu_set_throttle(struct acpicpu_softc *, int);
struct acpi_cstate *acpicpu_find_cstate(struct acpicpu_softc *, int);
#endif
struct cfattach acpicpu_ca = {
sizeof(struct acpicpu_softc), acpicpu_match, acpicpu_attach
};
struct cfdriver acpicpu_cd = {
NULL, "acpicpu", DV_DULL
};
const char *acpicpu_hids[] = {
"ACPI0007",
NULL
};
extern int setperf_prio;
#if 0
void
acpicpu_set_throttle(struct acpicpu_softc *sc, int level)
{
uint32_t pbval;
if (sc->sc_flags & FLAGS_NOTHROTTLE)
return;
/* Disable throttling control */
pbval = inl(sc->sc_pblk_addr);
outl(sc->sc_pblk_addr, pbval & ~CPU_THT_EN);
if (level < 100) {
pbval &= ~CPU_STATEMASK(sc);
pbval |= CPU_STATE(sc, level);
outl(sc->sc_pblk_addr, pbval & ~CPU_THT_EN);
outl(sc->sc_pblk_addr, pbval | CPU_THT_EN);
}
}
struct acpi_cstate *
acpicpu_find_cstate(struct acpicpu_softc *sc, int state)
{
struct acpi_cstate *cx;
SLIST_FOREACH(cx, &sc->sc_cstates, link)
if (cx->state == state)
return cx;
return (NULL);
}
#endif
void
acpicpu_set_pdc(struct acpicpu_softc *sc)
{
struct aml_value cmd, osc_cmd[4];
struct aml_value res;
uint32_t cap;
uint32_t buf[3];
/* 4077A616-290C-47BE-9EBD-D87058713953 */
static uint8_t cpu_oscuuid[16] = { 0x16, 0xA6, 0x77, 0x40, 0x0C, 0x29,
0xBE, 0x47, 0x9E, 0xBD, 0xD8, 0x70,
0x58, 0x71, 0x39, 0x53 };
cap = ACPI_PDC_C_C1_HALT | ACPI_PDC_P_FFH | ACPI_PDC_C_C1_FFH
| ACPI_PDC_C_C2C3_FFH | ACPI_PDC_SMP_P_SWCOORD | ACPI_PDC_SMP_C2C3
| ACPI_PDC_SMP_C1PT;
if (aml_searchname(sc->sc_devnode, "_OSC")) {
/* Query _OSC */
memset(&osc_cmd, 0, sizeof(osc_cmd));
osc_cmd[0].type = AML_OBJTYPE_BUFFER;
osc_cmd[0].v_buffer = (uint8_t *)&cpu_oscuuid;
osc_cmd[0].length = sizeof(cpu_oscuuid);
osc_cmd[1].type = AML_OBJTYPE_INTEGER;
osc_cmd[1].v_integer = 1;
osc_cmd[1].length = 1;
osc_cmd[2].type = AML_OBJTYPE_INTEGER;
osc_cmd[2].v_integer = 2;
osc_cmd[2].length = 1;
buf[0] = 1;
buf[1] = cap;
osc_cmd[3].type = AML_OBJTYPE_BUFFER;
osc_cmd[3].v_buffer = (int8_t *)&buf;
osc_cmd[3].length = sizeof(buf);
aml_evalname(sc->sc_acpi, sc->sc_devnode, "_OSC",
4, osc_cmd, &res);
if (res.type != AML_OBJTYPE_BUFFER || res.length < 8) {
printf(": unable to query capabilities\n");
aml_freevalue(&res);
return;
}
/* Evaluate _OSC */
memset(&osc_cmd, 0, sizeof(osc_cmd));
osc_cmd[0].type = AML_OBJTYPE_BUFFER;
osc_cmd[0].v_buffer = (uint8_t *)&cpu_oscuuid;
osc_cmd[0].length = sizeof(cpu_oscuuid);
osc_cmd[1].type = AML_OBJTYPE_INTEGER;
osc_cmd[1].v_integer = 1;
osc_cmd[1].length = 1;
osc_cmd[2].type = AML_OBJTYPE_INTEGER;
osc_cmd[2].v_integer = 2;
osc_cmd[2].length = 1;
buf[0] = 0;
buf[1] = (*(uint32_t *)&res.v_buffer[4]) & cap;
osc_cmd[3].type = AML_OBJTYPE_BUFFER;
osc_cmd[3].v_buffer = (int8_t *)&buf;
osc_cmd[3].length = sizeof(buf);
aml_freevalue(&res);
aml_evalname(sc->sc_acpi, sc->sc_devnode, "_OSC",
4, osc_cmd, NULL);
} else {
/* Evaluate _PDC */
memset(&cmd, 0, sizeof(cmd));
cmd.type = AML_OBJTYPE_BUFFER;
cmd.v_buffer = (uint8_t *)&buf;
cmd.length = sizeof(buf);
buf[0] = ACPI_PDC_REVID;
buf[1] = 1;
buf[2] = cap;
aml_evalname(sc->sc_acpi, sc->sc_devnode, "_PDC",
1, &cmd, NULL);
}
}
/*
* sanity check mwait hints against what cpuid told us
* ...but because intel screwed up, just check whether cpuid says
* the given state has _any_ substates.
*/
static int
check_mwait_hints(int state, int hints)
{
int cstate;
int num_substates;
if (cpu_mwait_size == 0)
return (0);
cstate = ((hints >> 4) & 0xf) + 1;
if (cstate == 16)
cstate = 0;
else if (cstate > 7) {
/* out of range of test against CPUID; just trust'em */
return (1);
}
num_substates = (cpu_mwait_states >> (4 * cstate)) & 0xf;
if (num_substates == 0) {
printf(": C%d bad (state %d has no substates)", state, cstate);
return (0);
}
return (1);
}
void
acpicpu_add_cstate(struct acpicpu_softc *sc, int state, int method,
int flags, int latency, int power, uint64_t address)
{
struct acpi_cstate *cx;
dnprintf(10," C%d: latency:.%4x power:%.4x addr:%.16llx\n",
state, latency, power, address);
/* add a new state, or overwrite the fallback C1 state? */
if (state != ACPI_STATE_C1 ||
(cx = SLIST_FIRST(&sc->sc_cstates)) == NULL ||
(cx->flags & CST_FLAG_FALLBACK) == 0) {
cx = malloc(sizeof(*cx), M_DEVBUF, M_WAITOK);
SLIST_INSERT_HEAD(&sc->sc_cstates, cx, link);
}
cx->state = state;
cx->method = method;
cx->flags = flags;
cx->latency = latency;
cx->power = power;
cx->address = address;
}
/* Found a _CST object, add new cstate for each entry */
void
acpicpu_add_cstatepkg(struct aml_value *val, void *arg)
{
struct acpicpu_softc *sc = arg;
uint64_t addr;
struct acpi_grd *grd;
int state, method, flags;
#if defined(ACPI_DEBUG) && !defined(SMALL_KERNEL)
aml_showvalue(val);
#endif
if (val->type != AML_OBJTYPE_PACKAGE || val->length != 4)
return;
/* range and sanity checks */
state = val->v_package[1]->v_integer;
if (state < 0 || state > 4)
return;
if (val->v_package[0]->type != AML_OBJTYPE_BUFFER) {
printf(": C%d (unexpected ACPI object type %d)",
state, val->v_package[0]->type);
return;
}
grd = (struct acpi_grd *)val->v_package[0]->v_buffer;
if (val->v_package[0]->length != sizeof(*grd) + 2 ||
grd->grd_descriptor != LR_GENREGISTER ||
grd->grd_length != sizeof(grd->grd_gas) ||
val->v_package[0]->v_buffer[sizeof(*grd)] != SRT_ENDTAG) {
printf(": C%d (bogo buffer)", state);
return;
}
flags = 0;
switch (grd->grd_gas.address_space_id) {
case GAS_FUNCTIONAL_FIXED:
if (grd->grd_gas.register_bit_width == 0) {
method = CST_METH_HALT;
addr = 0;
} else {
/*
* In theory we should only do this for
* vendor 1 == Intel but other values crop up,
* presumably due to the normal ACPI spec confusion.
*/
switch (grd->grd_gas.register_bit_offset) {
case 0x1:
method = CST_METH_IO_HALT;
addr = grd->grd_gas.address;
/* i386 and amd64 I/O space is 16bits */
if (addr > 0xffff) {
printf(": C%d (bogo I/O addr %llx)",
state, addr);
return;
}
break;
case 0x2:
addr = grd->grd_gas.address;
if (!check_mwait_hints(state, addr))
return;
method = CST_METH_MWAIT;
flags = grd->grd_gas.access_size;
break;
default:
printf(": C%d (unknown FFH class %d)",
state, grd->grd_gas.register_bit_offset);
return;
}
}
break;
case GAS_SYSTEM_IOSPACE:
addr = grd->grd_gas.address;
if (grd->grd_gas.register_bit_width != 8 ||
grd->grd_gas.register_bit_offset != 0) {
printf(": C%d (unhandled %s spec: %d/%d)", state,
"I/O", grd->grd_gas.register_bit_width,
grd->grd_gas.register_bit_offset);
return;
}
method = CST_METH_GAS_IO;
break;
default:
/* dump the GAS for analysis */
{
int i;
printf(": C%d (unhandled GAS:", state);
for (i = 0; i < sizeof(grd->grd_gas); i++)
printf(" %#x", ((u_char *)&grd->grd_gas)[i]);
printf(")");
}
return;
}
acpicpu_add_cstate(sc, state, method, flags,
val->v_package[2]->v_integer, val->v_package[3]->v_integer, addr);
}
/* Found a _CSD object, print the dependency */
void
acpicpu_add_cdeppkg(struct aml_value *val, void *arg)
{
int64_t num_proc, coord_type, domain, cindex;
/*
* errors: unexpected object type, bad length, mismatched length,
* and bad CSD revision
*/
if (val->type != AML_OBJTYPE_PACKAGE || val->length < 6 ||
val->length != val->v_package[0]->v_integer ||
val->v_package[1]->v_integer != 0) {
#if 1 || defined(ACPI_DEBUG) && !defined(SMALL_KERNEL)
aml_showvalue(val);
#endif
printf("bogus CSD\n");
return;
}
/* coordinating 'among' one CPU is trivial, ignore */
num_proc = val->v_package[4]->v_integer;
if (num_proc == 1)
return;
/* we practically assume the hardware will coordinate, so ignore */
coord_type = val->v_package[3]->v_integer;
if (coord_type == CSD_COORD_HW_ALL)
return;
domain = val->v_package[2]->v_integer;
cindex = val->v_package[5]->v_integer;
printf(": CSD (c=%#llx d=%lld n=%lld i=%lli)",
coord_type, domain, num_proc, cindex);
}
int
acpicpu_getcst(struct acpicpu_softc *sc)
{
struct aml_value res;
struct acpi_cstate *cx, *next_cx;
int use_nonmwait;
/* delete the existing list */
while ((cx = SLIST_FIRST(&sc->sc_cstates)) != NULL) {
SLIST_REMOVE_HEAD(&sc->sc_cstates, link);
free(cx, M_DEVBUF, sizeof(*cx));
}
/* provide a fallback C1-via-halt in case _CST's C1 is bogus */
acpicpu_add_cstate(sc, ACPI_STATE_C1, CST_METH_HALT,
CST_FLAG_FALLBACK, 1, -1, 0);
if (aml_evalname(sc->sc_acpi, sc->sc_devnode, "_CST", 0, NULL, &res))
return (1);
aml_foreachpkg(&res, 1, acpicpu_add_cstatepkg, sc);
aml_freevalue(&res);
/* only have fallback state? then no _CST objects were understood */
cx = SLIST_FIRST(&sc->sc_cstates);
if (cx->flags & CST_FLAG_FALLBACK)
return (1);
/*
* Skip states >= C2 if the CPU's LAPIC timer stops in deep
* states (i.e., it doesn't have the 'ARAT' bit set).
* Also keep track if all the states we'll use use mwait.
*/
use_nonmwait = 0;
while ((next_cx = SLIST_NEXT(cx, link)) != NULL) {
if (cx->state > 1 &&
(sc->sc_ci->ci_feature_tpmflags & TPM_ARAT) == 0)
cx->flags |= CST_FLAG_SKIP;
else if (cx->method != CST_METH_MWAIT)
use_nonmwait = 1;
cx = next_cx;
}
if (use_nonmwait)
sc->sc_flags &= ~FLAGS_MWAIT_ONLY;
else
sc->sc_flags |= FLAGS_MWAIT_ONLY;
if (!aml_evalname(sc->sc_acpi, sc->sc_devnode, "_CSD", 0, NULL, &res)) {
aml_foreachpkg(&res, 1, acpicpu_add_cdeppkg, sc);
aml_freevalue(&res);
}
return (0);
}
/*
* old-style fixed C-state info in the FADT.
* Note that this has extra restrictions on values and flags.
*/
void
acpicpu_getcst_from_fadt(struct acpicpu_softc *sc)
{
struct acpi_fadt *fadt = sc->sc_acpi->sc_fadt;
int flags;
/* FADT has to set flag to do C2 and higher on MP */
if ((fadt->flags & FADT_P_LVL2_UP) == 0 && ncpus > 1)
return;
/* skip these C2 and C3 states if the CPU doesn't have ARAT */
flags = (sc->sc_ci->ci_feature_tpmflags & TPM_ARAT)
? 0 : CST_FLAG_SKIP;
/* Some systems don't export a full PBLK; reduce functionality */
if (sc->sc_pblk_len >= 5 && fadt->p_lvl2_lat <= ACPI_MAX_C2_LATENCY) {
acpicpu_add_cstate(sc, ACPI_STATE_C2, CST_METH_GAS_IO, flags,
fadt->p_lvl2_lat, -1, sc->sc_pblk_addr + 4);
}
if (sc->sc_pblk_len >= 6 && fadt->p_lvl3_lat <= ACPI_MAX_C3_LATENCY)
acpicpu_add_cstate(sc, ACPI_STATE_C3, CST_METH_GAS_IO, flags,
fadt->p_lvl3_lat, -1, sc->sc_pblk_addr + 5);
}
void
acpicpu_print_one_cst(struct acpi_cstate *cx)
{
const char *meth = "";
int show_addr = 0;
switch (cx->method) {
case CST_METH_IO_HALT:
show_addr = 1;
/* fallthrough */
case CST_METH_HALT:
meth = " halt";
break;
case CST_METH_MWAIT:
meth = " mwait";
show_addr = cx->address != 0;
break;
case CST_METH_GAS_IO:
meth = " io";
show_addr = 1;
break;
}
printf(" %sC%d(", (cx->flags & CST_FLAG_SKIP ? "!" : ""), cx->state);
if (cx->power != -1)
printf("%d", cx->power);
printf("@%d%s", cx->latency, meth);
if (cx->flags & ~CST_FLAG_SKIP) {
if (cx->flags & CST_FLAG_FALLBACK)
printf("!");
else
printf(".%x", (cx->flags & ~CST_FLAG_SKIP));
}
if (show_addr)
printf("@0x%llx", cx->address);
printf(")");
}
void
acpicpu_print_cst(struct acpicpu_softc *sc)
{
struct acpi_cstate *cx;
int i;
if (!SLIST_EMPTY(&sc->sc_cstates)) {
printf(":");
i = 0;
SLIST_FOREACH(cx, &sc->sc_cstates, link) {
if (i++)
printf(",");
acpicpu_print_one_cst(cx);
}
}
}
int
acpicpu_match(struct device *parent, void *match, void *aux)
{
struct acpi_attach_args *aa = aux;
struct cfdata *cf = match;
struct acpi_softc *acpi = (struct acpi_softc *)parent;
if (acpi_matchhids(aa, acpicpu_hids, cf->cf_driver->cd_name) &&
aa->aaa_node && aa->aaa_node->value &&
aa->aaa_node->value->type == AML_OBJTYPE_DEVICE) {
/*
* Record that we've seen a Device() CPU object,
* so we won't attach any Processor() nodes.
*/
acpi->sc_skip_processor = 1;
return (1);
}
/* sanity */
if (aa->aaa_name == NULL ||
strcmp(aa->aaa_name, cf->cf_driver->cd_name) != 0 ||
aa->aaa_table != NULL)
return (0);
return (1);
}
void
acpicpu_attach(struct device *parent, struct device *self, void *aux)
{
struct acpicpu_softc *sc = (struct acpicpu_softc *)self;
struct acpi_attach_args *aa = aux;
struct aml_value res;
int64_t uid;
int i;
uint32_t status = 0;
CPU_INFO_ITERATOR cii;
struct cpu_info *ci;
sc->sc_acpi = (struct acpi_softc *)parent;
sc->sc_devnode = aa->aaa_node;
SLIST_INIT(&sc->sc_cstates);
if (aml_evalinteger(sc->sc_acpi, sc->sc_devnode,
"_UID", 0, NULL, &uid) == 0)
sc->sc_cpu = uid;
if (aml_evalnode(sc->sc_acpi, sc->sc_devnode, 0, NULL, &res) == 0) {
if (res.type == AML_OBJTYPE_PROCESSOR) {
sc->sc_cpu = res.v_processor.proc_id;
sc->sc_pblk_addr = res.v_processor.proc_addr;
sc->sc_pblk_len = res.v_processor.proc_len;
}
aml_freevalue(&res);
}
sc->sc_duty_off = sc->sc_acpi->sc_fadt->duty_offset;
sc->sc_duty_wid = sc->sc_acpi->sc_fadt->duty_width;
/* link in the matching cpu_info */
CPU_INFO_FOREACH(cii, ci)
if (ci->ci_acpi_proc_id == sc->sc_cpu) {
ci->ci_acpicpudev = self;
sc->sc_ci = ci;
break;
}
if (ci == NULL) {
printf(": no cpu matching ACPI ID %d\n", sc->sc_cpu);
return;
}
sc->sc_prev_sleep = 1000000;
acpicpu_set_pdc(sc);
if (!valid_throttle(sc->sc_duty_off, sc->sc_duty_wid, sc->sc_pblk_addr))
sc->sc_flags |= FLAGS_NOTHROTTLE;
#ifdef ACPI_DEBUG
printf(": %s: ", sc->sc_devnode->name);
printf("\n: hdr:%x pblk:%x,%x duty:%x,%x pstate:%x "
"(%ld throttling states)\n", sc->sc_acpi->sc_fadt->hdr_revision,
sc->sc_pblk_addr, sc->sc_pblk_len, sc->sc_duty_off,
sc->sc_duty_wid, sc->sc_acpi->sc_fadt->pstate_cnt,
CPU_MAXSTATE(sc));
#endif
/* Get C-States from _CST or FADT */
if (acpicpu_getcst(sc) || SLIST_EMPTY(&sc->sc_cstates))
acpicpu_getcst_from_fadt(sc);
else {
/* Notify BIOS we use _CST objects */
if (sc->sc_acpi->sc_fadt->cst_cnt) {
acpi_write_pmreg(sc->sc_acpi, ACPIREG_SMICMD, 0,
sc->sc_acpi->sc_fadt->cst_cnt);
}
}
if (!SLIST_EMPTY(&sc->sc_cstates)) {
extern uint32_t acpi_force_bm;
cpu_idle_cycle_fcn = &acpicpu_idle;
/*
* C3 (and maybe C2?) needs BM_RLD to be set to
* wake the system
*/
if (SLIST_FIRST(&sc->sc_cstates)->state > 1 && acpi_force_bm == 0) {
uint16_t en = acpi_read_pmreg(sc->sc_acpi,
ACPIREG_PM1_CNT, 0);
if ((en & ACPI_PM1_BM_RLD) == 0) {
acpi_write_pmreg(sc->sc_acpi, ACPIREG_PM1_CNT,
0, en | ACPI_PM1_BM_RLD);
acpi_force_bm = ACPI_PM1_BM_RLD;
}
}
}
if (acpicpu_getpss(sc)) {
sc->sc_flags |= FLAGS_NOPSS;
} else {
#ifdef ACPI_DEBUG
for (i = 0; i < sc->sc_pss_len; i++) {
dnprintf(20, "%d %d %d %d %d %d\n",
sc->sc_pss[i].pss_core_freq,
sc->sc_pss[i].pss_power,
sc->sc_pss[i].pss_trans_latency,
sc->sc_pss[i].pss_bus_latency,
sc->sc_pss[i].pss_ctrl,
sc->sc_pss[i].pss_status);
}
dnprintf(20, "\n");
#endif
if (sc->sc_pss_len == 0) {
/* this should never happen */
printf("%s: invalid _PSS length\n", DEVNAME(sc));
sc->sc_flags |= FLAGS_NOPSS;
}
acpicpu_getppc(sc);
if (acpicpu_getpct(sc))
sc->sc_flags |= FLAGS_NOPCT;
else if (sc->sc_pss_len > 0) {
/* Notify BIOS we are handling p-states */
if (sc->sc_acpi->sc_fadt->pstate_cnt) {
acpi_write_pmreg(sc->sc_acpi, ACPIREG_SMICMD,
0, sc->sc_acpi->sc_fadt->pstate_cnt);
}
aml_register_notify(sc->sc_devnode, NULL,
acpicpu_notify, sc, ACPIDEV_NOPOLL);
acpi_gasio(sc->sc_acpi, ACPI_IOREAD,
sc->sc_pct.pct_status.grd_gas.address_space_id,
sc->sc_pct.pct_status.grd_gas.address,
sc->sc_pct_stat_as, sc->sc_pct_stat_as, &status);
sc->sc_level = (100 / sc->sc_pss_len) *
(sc->sc_pss_len - status);
dnprintf(20, "%s: cpu index %d, percentage %d\n",
DEVNAME(sc), status, sc->sc_level);
if (setperf_prio < 30) {
cpu_setperf = acpicpu_setperf;
acpicpu_set_notify(acpicpu_setperf_ppc_change);
setperf_prio = 30;
acpi_hasprocfvs = 1;
}
}
}
/*
* Nicely enumerate what power management capabilities
* ACPI CPU provides.
*/
acpicpu_print_cst(sc);
if (!(sc->sc_flags & (FLAGS_NOPSS | FLAGS_NOPCT)) ||
!(sc->sc_flags & FLAGS_NOPSS)) {
printf("%c ", SLIST_EMPTY(&sc->sc_cstates) ? ':' : ',');
/*
* If acpicpu is itself providing the capability to transition
* states, enumerate them in the fashion that est and powernow
* would.
*/
if (!(sc->sc_flags & (FLAGS_NOPSS | FLAGS_NOPCT))) {
printf("FVS, ");
for (i = 0; i < sc->sc_pss_len - 1; i++)
printf("%d, ", sc->sc_pss[i].pss_core_freq);
printf("%d MHz", sc->sc_pss[i].pss_core_freq);
} else
printf("PSS");
}
printf("\n");
}
int
acpicpu_getppc(struct acpicpu_softc *sc)
{
struct aml_value res;
sc->sc_ppc = 0;
if (aml_evalname(sc->sc_acpi, sc->sc_devnode, "_PPC", 0, NULL, &res)) {
dnprintf(10, "%s: no _PPC\n", DEVNAME(sc));
return (1);
}
sc->sc_ppc = aml_val2int(&res);
dnprintf(10, "%s: _PPC: %d\n", DEVNAME(sc), sc->sc_ppc);
aml_freevalue(&res);
return (0);
}
int
acpicpu_getpct(struct acpicpu_softc *sc)
{
struct aml_value res;
int rv = 1;
if (aml_evalname(sc->sc_acpi, sc->sc_devnode, "_PCT", 0, NULL, &res)) {
dnprintf(20, "%s: no _PCT\n", DEVNAME(sc));
return (1);
}
if (res.length != 2) {
dnprintf(20, "%s: %s: invalid _PCT length\n", DEVNAME(sc),
sc->sc_devnode->name);
return (1);
}
memcpy(&sc->sc_pct.pct_ctrl, res.v_package[0]->v_buffer,
sizeof sc->sc_pct.pct_ctrl);
if (sc->sc_pct.pct_ctrl.grd_gas.address_space_id ==
GAS_FUNCTIONAL_FIXED) {
dnprintf(20, "CTRL GASIO is functional fixed hardware.\n");
goto ffh;
}
memcpy(&sc->sc_pct.pct_status, res.v_package[1]->v_buffer,
sizeof sc->sc_pct.pct_status);
if (sc->sc_pct.pct_status.grd_gas.address_space_id ==
GAS_FUNCTIONAL_FIXED) {
dnprintf(20, "CTRL GASIO is functional fixed hardware.\n");
goto ffh;
}
dnprintf(10, "_PCT(ctrl) : %02x %04x %02x %02x %02x %02x %016llx\n",
sc->sc_pct.pct_ctrl.grd_descriptor,
sc->sc_pct.pct_ctrl.grd_length,
sc->sc_pct.pct_ctrl.grd_gas.address_space_id,
sc->sc_pct.pct_ctrl.grd_gas.register_bit_width,
sc->sc_pct.pct_ctrl.grd_gas.register_bit_offset,
sc->sc_pct.pct_ctrl.grd_gas.access_size,
sc->sc_pct.pct_ctrl.grd_gas.address);
dnprintf(10, "_PCT(status): %02x %04x %02x %02x %02x %02x %016llx\n",
sc->sc_pct.pct_status.grd_descriptor,
sc->sc_pct.pct_status.grd_length,
sc->sc_pct.pct_status.grd_gas.address_space_id,
sc->sc_pct.pct_status.grd_gas.register_bit_width,
sc->sc_pct.pct_status.grd_gas.register_bit_offset,
sc->sc_pct.pct_status.grd_gas.access_size,
sc->sc_pct.pct_status.grd_gas.address);
/* if not set assume single 32 bit access */
sc->sc_pct_stat_as = sc->sc_pct.pct_status.grd_gas.register_bit_width
/ 8;
if (sc->sc_pct_stat_as == 0)
sc->sc_pct_stat_as = 4;
sc->sc_pct_ctrl_as = sc->sc_pct.pct_ctrl.grd_gas.register_bit_width / 8;
if (sc->sc_pct_ctrl_as == 0)
sc->sc_pct_ctrl_as = 4;
sc->sc_pct_stat_len = sc->sc_pct.pct_status.grd_gas.access_size;
if (sc->sc_pct_stat_len == 0)
sc->sc_pct_stat_len = sc->sc_pct_stat_as;
sc->sc_pct_ctrl_len = sc->sc_pct.pct_ctrl.grd_gas.access_size;
if (sc->sc_pct_ctrl_len == 0)
sc->sc_pct_ctrl_len = sc->sc_pct_ctrl_as;
rv = 0;
ffh:
aml_freevalue(&res);
return (rv);
}
int
acpicpu_getpss(struct acpicpu_softc *sc)
{
struct aml_value res;
int i, c, cf;
if (aml_evalname(sc->sc_acpi, sc->sc_devnode, "_PSS", 0, NULL, &res)) {
dprintf("%s: no _PSS\n", DEVNAME(sc));
return (1);
}
free(sc->sc_pss, M_DEVBUF, sc->sc_pssfulllen);
sc->sc_pss = mallocarray(res.length, sizeof(*sc->sc_pss), M_DEVBUF,
M_WAITOK | M_ZERO);
sc->sc_pssfulllen = res.length * sizeof(*sc->sc_pss);
c = 0;
for (i = 0; i < res.length; i++) {
cf = aml_val2int(res.v_package[i]->v_package[0]);
/* This heuristic comes from FreeBSDs
* dev/acpica/acpi_perf.c to weed out invalid PSS entries.
*/
if (cf == sc->sc_pss[c].pss_core_freq) {
printf("%s: struck PSS entry, core frequency equals "
" last\n", sc->sc_dev.dv_xname);
continue;
}
if (cf == 0xFFFF || cf == 0x9999 || cf == 99999 || cf == 0) {
printf("%s: struck PSS entry, inappropriate core "
"frequency value\n", sc->sc_dev.dv_xname);
continue;
}
sc->sc_pss[c].pss_core_freq = cf;
sc->sc_pss[c].pss_power = aml_val2int(
res.v_package[i]->v_package[1]);
sc->sc_pss[c].pss_trans_latency = aml_val2int(
res.v_package[i]->v_package[2]);
sc->sc_pss[c].pss_bus_latency = aml_val2int(
res.v_package[i]->v_package[3]);
sc->sc_pss[c].pss_ctrl = aml_val2int(
res.v_package[i]->v_package[4]);
sc->sc_pss[c].pss_status = aml_val2int(
res.v_package[i]->v_package[5]);
c++;
}
sc->sc_pss_len = c;
aml_freevalue(&res);
return (0);
}
int
acpicpu_fetch_pss(struct acpicpu_pss **pss)
{
struct acpicpu_softc *sc;
/*
* XXX: According to the ACPI spec in an SMP system all processors
* are supposed to support the same states. For now we pray
* the bios ensures this...
*/