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Linux 2.6.25-rc4
[linux-2.6/next.git] / arch / ia64 / kernel / palinfo.c
blob396004e8cd1432af8fa1440ea0e2b93c385175bd
1 /*
2 * palinfo.c
3 *
4 * Prints processor specific information reported by PAL.
5 * This code is based on specification of PAL as of the
6 * Intel IA-64 Architecture Software Developer's Manual v1.0.
7 *
8 *
9 * Copyright (C) 2000-2001, 2003 Hewlett-Packard Co
10 * Stephane Eranian <eranian@hpl.hp.com>
11 * Copyright (C) 2004 Intel Corporation
12 * Ashok Raj <ashok.raj@intel.com>
13 *
14 * 05/26/2000 S.Eranian initial release
15 * 08/21/2000 S.Eranian updated to July 2000 PAL specs
16 * 02/05/2001 S.Eranian fixed module support
17 * 10/23/2001 S.Eranian updated pal_perf_mon_info bug fixes
18 * 03/24/2004 Ashok Raj updated to work with CPU Hotplug
19 * 10/26/2006 Russ Anderson updated processor features to rev 2.2 spec
20 */
21 #include <linux/types.h>
22 #include <linux/errno.h>
23 #include <linux/init.h>
24 #include <linux/proc_fs.h>
25 #include <linux/mm.h>
26 #include <linux/module.h>
27 #include <linux/efi.h>
28 #include <linux/notifier.h>
29 #include <linux/cpu.h>
30 #include <linux/cpumask.h>
31
32 #include <asm/pal.h>
33 #include <asm/sal.h>
34 #include <asm/page.h>
35 #include <asm/processor.h>
36 #include <linux/smp.h>
37
38 MODULE_AUTHOR("Stephane Eranian <eranian@hpl.hp.com>");
39 MODULE_DESCRIPTION("/proc interface to IA-64 PAL");
40 MODULE_LICENSE("GPL");
41
42 #define PALINFO_VERSION "0.5"
43
44 typedef int (*palinfo_func_t)(char*);
45
46 typedef struct {
47 const char *name; /* name of the proc entry */
48 palinfo_func_t proc_read; /* function to call for reading */
49 struct proc_dir_entry *entry; /* registered entry (removal) */
50 } palinfo_entry_t;
51
52
53 /*
54 * A bunch of string array to get pretty printing
55 */
56
57 static char *cache_types[] = {
58 "", /* not used */
59 "Instruction",
60 "Data",
61 "Data/Instruction" /* unified */
62 };
63
64 static const char *cache_mattrib[]={
65 "WriteThrough",
66 "WriteBack",
67 "", /* reserved */
68 "" /* reserved */
69 };
70
71 static const char *cache_st_hints[]={
72 "Temporal, level 1",
73 "Reserved",
74 "Reserved",
75 "Non-temporal, all levels",
76 "Reserved",
77 "Reserved",
78 "Reserved",
79 "Reserved"
80 };
81
82 static const char *cache_ld_hints[]={
83 "Temporal, level 1",
84 "Non-temporal, level 1",
85 "Reserved",
86 "Non-temporal, all levels",
87 "Reserved",
88 "Reserved",
89 "Reserved",
90 "Reserved"
91 };
92
93 static const char *rse_hints[]={
94 "enforced lazy",
95 "eager stores",
96 "eager loads",
97 "eager loads and stores"
98 };
99
100 #define RSE_HINTS_COUNT ARRAY_SIZE(rse_hints)
101
102 static const char *mem_attrib[]={
103 "WB", /* 000 */
104 "SW", /* 001 */
105 "010", /* 010 */
106 "011", /* 011 */
107 "UC", /* 100 */
108 "UCE", /* 101 */
109 "WC", /* 110 */
110 "NaTPage" /* 111 */
111 };
112
113 /*
114 * Take a 64bit vector and produces a string such that
115 * if bit n is set then 2^n in clear text is generated. The adjustment
116 * to the right unit is also done.
117 *
118 * Input:
119 * - a pointer to a buffer to hold the string
120 * - a 64-bit vector
121 * Ouput:
122 * - a pointer to the end of the buffer
123 *
124 */
125 static char *
126 bitvector_process(char *p, u64 vector)
127 {
128 int i,j;
129 const char *units[]={ "", "K", "M", "G", "T" };
130
131 for (i=0, j=0; i < 64; i++ , j=i/10) {
132 if (vector & 0x1) {
133 p += sprintf(p, "%d%s ", 1 << (i-j*10), units[j]);
134 }
135 vector >>= 1;
136 }
137 return p;
138 }
139
140 /*
141 * Take a 64bit vector and produces a string such that
142 * if bit n is set then register n is present. The function
143 * takes into account consecutive registers and prints out ranges.
144 *
145 * Input:
146 * - a pointer to a buffer to hold the string
147 * - a 64-bit vector
148 * Ouput:
149 * - a pointer to the end of the buffer
150 *
151 */
152 static char *
153 bitregister_process(char *p, u64 *reg_info, int max)
154 {
155 int i, begin, skip = 0;
156 u64 value = reg_info[0];
157
158 value >>= i = begin = ffs(value) - 1;
159
160 for(; i < max; i++ ) {
161
162 if (i != 0 && (i%64) == 0) value = *++reg_info;
163
164 if ((value & 0x1) == 0 && skip == 0) {
165 if (begin <= i - 2)
166 p += sprintf(p, "%d-%d ", begin, i-1);
167 else
168 p += sprintf(p, "%d ", i-1);
169 skip = 1;
170 begin = -1;
171 } else if ((value & 0x1) && skip == 1) {
172 skip = 0;
173 begin = i;
174 }
175 value >>=1;
176 }
177 if (begin > -1) {
178 if (begin < 127)
179 p += sprintf(p, "%d-127", begin);
180 else
181 p += sprintf(p, "127");
182 }
183
184 return p;
185 }
186
187 static int
188 power_info(char *page)
189 {
190 s64 status;
191 char *p = page;
192 u64 halt_info_buffer[8];
193 pal_power_mgmt_info_u_t *halt_info =(pal_power_mgmt_info_u_t *)halt_info_buffer;
194 int i;
195
196 status = ia64_pal_halt_info(halt_info);
197 if (status != 0) return 0;
198
199 for (i=0; i < 8 ; i++ ) {
200 if (halt_info[i].pal_power_mgmt_info_s.im == 1) {
201 p += sprintf(p, "Power level %d:\n"
202 "\tentry_latency : %d cycles\n"
203 "\texit_latency : %d cycles\n"
204 "\tpower consumption : %d mW\n"
205 "\tCache+TLB coherency : %s\n", i,
206 halt_info[i].pal_power_mgmt_info_s.entry_latency,
207 halt_info[i].pal_power_mgmt_info_s.exit_latency,
208 halt_info[i].pal_power_mgmt_info_s.power_consumption,
209 halt_info[i].pal_power_mgmt_info_s.co ? "Yes" : "No");
210 } else {
211 p += sprintf(p,"Power level %d: not implemented\n",i);
212 }
213 }
214 return p - page;
215 }
216
217 static int
218 cache_info(char *page)
219 {
220 char *p = page;
221 u64 i, levels, unique_caches;
222 pal_cache_config_info_t cci;
223 int j, k;
224 s64 status;
225
226 if ((status = ia64_pal_cache_summary(&levels, &unique_caches)) != 0) {
227 printk(KERN_ERR "ia64_pal_cache_summary=%ld\n", status);
228 return 0;
229 }
230
231 p += sprintf(p, "Cache levels : %ld\nUnique caches : %ld\n\n", levels, unique_caches);
232
233 for (i=0; i < levels; i++) {
234
235 for (j=2; j >0 ; j--) {
236
237 /* even without unification some level may not be present */
238 if ((status=ia64_pal_cache_config_info(i,j, &cci)) != 0) {
239 continue;
240 }
241 p += sprintf(p,
242 "%s Cache level %lu:\n"
243 "\tSize : %u bytes\n"
244 "\tAttributes : ",
245 cache_types[j+cci.pcci_unified], i+1,
246 cci.pcci_cache_size);
247
248 if (cci.pcci_unified) p += sprintf(p, "Unified ");
249
250 p += sprintf(p, "%s\n", cache_mattrib[cci.pcci_cache_attr]);
251
252 p += sprintf(p,
253 "\tAssociativity : %d\n"
254 "\tLine size : %d bytes\n"
255 "\tStride : %d bytes\n",
256 cci.pcci_assoc, 1<<cci.pcci_line_size, 1<<cci.pcci_stride);
257 if (j == 1)
258 p += sprintf(p, "\tStore latency : N/A\n");
259 else
260 p += sprintf(p, "\tStore latency : %d cycle(s)\n",
261 cci.pcci_st_latency);
262
263 p += sprintf(p,
264 "\tLoad latency : %d cycle(s)\n"
265 "\tStore hints : ", cci.pcci_ld_latency);
266
267 for(k=0; k < 8; k++ ) {
268 if ( cci.pcci_st_hints & 0x1)
269 p += sprintf(p, "[%s]", cache_st_hints[k]);
270 cci.pcci_st_hints >>=1;
271 }
272 p += sprintf(p, "\n\tLoad hints : ");
273
274 for(k=0; k < 8; k++ ) {
275 if (cci.pcci_ld_hints & 0x1)
276 p += sprintf(p, "[%s]", cache_ld_hints[k]);
277 cci.pcci_ld_hints >>=1;
278 }
279 p += sprintf(p,
280 "\n\tAlias boundary : %d byte(s)\n"
281 "\tTag LSB : %d\n"
282 "\tTag MSB : %d\n",
283 1<<cci.pcci_alias_boundary, cci.pcci_tag_lsb,
284 cci.pcci_tag_msb);
285
286 /* when unified, data(j=2) is enough */
287 if (cci.pcci_unified) break;
288 }
289 }
290 return p - page;
291 }
292
293
294 static int
295 vm_info(char *page)
296 {
297 char *p = page;
298 u64 tr_pages =0, vw_pages=0, tc_pages;
299 u64 attrib;
300 pal_vm_info_1_u_t vm_info_1;
301 pal_vm_info_2_u_t vm_info_2;
302 pal_tc_info_u_t tc_info;
303 ia64_ptce_info_t ptce;
304 const char *sep;
305 int i, j;
306 s64 status;
307
308 if ((status = ia64_pal_vm_summary(&vm_info_1, &vm_info_2)) !=0) {
309 printk(KERN_ERR "ia64_pal_vm_summary=%ld\n", status);
310 } else {
311
312 p += sprintf(p,
313 "Physical Address Space : %d bits\n"
314 "Virtual Address Space : %d bits\n"
315 "Protection Key Registers(PKR) : %d\n"
316 "Implemented bits in PKR.key : %d\n"
317 "Hash Tag ID : 0x%x\n"
318 "Size of RR.rid : %d\n"
319 "Max Purges : ",
320 vm_info_1.pal_vm_info_1_s.phys_add_size,
321 vm_info_2.pal_vm_info_2_s.impl_va_msb+1,
322 vm_info_1.pal_vm_info_1_s.max_pkr+1,
323 vm_info_1.pal_vm_info_1_s.key_size,
324 vm_info_1.pal_vm_info_1_s.hash_tag_id,
325 vm_info_2.pal_vm_info_2_s.rid_size);
326 if (vm_info_2.pal_vm_info_2_s.max_purges == PAL_MAX_PURGES)
327 p += sprintf(p, "unlimited\n");
328 else
329 p += sprintf(p, "%d\n",
330 vm_info_2.pal_vm_info_2_s.max_purges ?
331 vm_info_2.pal_vm_info_2_s.max_purges : 1);
332 }
333
334 if (ia64_pal_mem_attrib(&attrib) == 0) {
335 p += sprintf(p, "Supported memory attributes : ");
336 sep = "";
337 for (i = 0; i < 8; i++) {
338 if (attrib & (1 << i)) {
339 p += sprintf(p, "%s%s", sep, mem_attrib[i]);
340 sep = ", ";
341 }
342 }
343 p += sprintf(p, "\n");
344 }
345
346 if ((status = ia64_pal_vm_page_size(&tr_pages, &vw_pages)) !=0) {
347 printk(KERN_ERR "ia64_pal_vm_page_size=%ld\n", status);
348 } else {
349
350 p += sprintf(p,
351 "\nTLB walker : %simplemented\n"
352 "Number of DTR : %d\n"
353 "Number of ITR : %d\n"
354 "TLB insertable page sizes : ",
355 vm_info_1.pal_vm_info_1_s.vw ? "" : "not ",
356 vm_info_1.pal_vm_info_1_s.max_dtr_entry+1,
357 vm_info_1.pal_vm_info_1_s.max_itr_entry+1);
358
359
360 p = bitvector_process(p, tr_pages);
361
362 p += sprintf(p, "\nTLB purgeable page sizes : ");
363
364 p = bitvector_process(p, vw_pages);
365 }
366 if ((status=ia64_get_ptce(&ptce)) != 0) {
367 printk(KERN_ERR "ia64_get_ptce=%ld\n", status);
368 } else {
369 p += sprintf(p,
370 "\nPurge base address : 0x%016lx\n"
371 "Purge outer loop count : %d\n"
372 "Purge inner loop count : %d\n"
373 "Purge outer loop stride : %d\n"
374 "Purge inner loop stride : %d\n",
375 ptce.base, ptce.count[0], ptce.count[1],
376 ptce.stride[0], ptce.stride[1]);
377
378 p += sprintf(p,
379 "TC Levels : %d\n"
380 "Unique TC(s) : %d\n",
381 vm_info_1.pal_vm_info_1_s.num_tc_levels,
382 vm_info_1.pal_vm_info_1_s.max_unique_tcs);
383
384 for(i=0; i < vm_info_1.pal_vm_info_1_s.num_tc_levels; i++) {
385 for (j=2; j>0 ; j--) {
386 tc_pages = 0; /* just in case */
387
388
389 /* even without unification, some levels may not be present */
390 if ((status=ia64_pal_vm_info(i,j, &tc_info, &tc_pages)) != 0) {
391 continue;
392 }
393
394 p += sprintf(p,
395 "\n%s Translation Cache Level %d:\n"
396 "\tHash sets : %d\n"
397 "\tAssociativity : %d\n"
398 "\tNumber of entries : %d\n"
399 "\tFlags : ",
400 cache_types[j+tc_info.tc_unified], i+1,
401 tc_info.tc_num_sets,
402 tc_info.tc_associativity,
403 tc_info.tc_num_entries);
404
405 if (tc_info.tc_pf)
406 p += sprintf(p, "PreferredPageSizeOptimized ");
407 if (tc_info.tc_unified)
408 p += sprintf(p, "Unified ");
409 if (tc_info.tc_reduce_tr)
410 p += sprintf(p, "TCReduction");
411
412 p += sprintf(p, "\n\tSupported page sizes: ");
413
414 p = bitvector_process(p, tc_pages);
415
416 /* when unified date (j=2) is enough */
417 if (tc_info.tc_unified)
418 break;
419 }
420 }
421 }
422 p += sprintf(p, "\n");
423
424 return p - page;
425 }
426
427
428 static int
429 register_info(char *page)
430 {
431 char *p = page;
432 u64 reg_info[2];
433 u64 info;
434 u64 phys_stacked;
435 pal_hints_u_t hints;
436 u64 iregs, dregs;
437 char *info_type[]={
438 "Implemented AR(s)",
439 "AR(s) with read side-effects",
440 "Implemented CR(s)",
441 "CR(s) with read side-effects",
442 };
443
444 for(info=0; info < 4; info++) {
445
446 if (ia64_pal_register_info(info, &reg_info[0], &reg_info[1]) != 0) return 0;
447
448 p += sprintf(p, "%-32s : ", info_type[info]);
449
450 p = bitregister_process(p, reg_info, 128);
451
452 p += sprintf(p, "\n");
453 }
454
455 if (ia64_pal_rse_info(&phys_stacked, &hints) == 0) {
456
457 p += sprintf(p,
458 "RSE stacked physical registers : %ld\n"
459 "RSE load/store hints : %ld (%s)\n",
460 phys_stacked, hints.ph_data,
461 hints.ph_data < RSE_HINTS_COUNT ? rse_hints[hints.ph_data]: "(??)");
462 }
463 if (ia64_pal_debug_info(&iregs, &dregs))
464 return 0;
465
466 p += sprintf(p,
467 "Instruction debug register pairs : %ld\n"
468 "Data debug register pairs : %ld\n", iregs, dregs);
469
470 return p - page;
471 }
472
473 static char *proc_features_0[]={ /* Feature set 0 */
474 NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
475 NULL,NULL,NULL,NULL,NULL,NULL,NULL, NULL,NULL,
476 NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
477 NULL,NULL,NULL,NULL,NULL, NULL,NULL,NULL,NULL,
478 "Unimplemented instruction address fault",
479 "INIT, PMI, and LINT pins",
480 "Simple unimplemented instr addresses",
481 "Variable P-state performance",
482 "Virtual machine features implemented",
483 "XIP,XPSR,XFS implemented",
484 "XR1-XR3 implemented",
485 "Disable dynamic predicate prediction",
486 "Disable processor physical number",
487 "Disable dynamic data cache prefetch",
488 "Disable dynamic inst cache prefetch",
489 "Disable dynamic branch prediction",
490 NULL, NULL, NULL, NULL,
491 "Disable P-states",
492 "Enable MCA on Data Poisoning",
493 "Enable vmsw instruction",
494 "Enable extern environmental notification",
495 "Disable BINIT on processor time-out",
496 "Disable dynamic power management (DPM)",
497 "Disable coherency",
498 "Disable cache",
499 "Enable CMCI promotion",
500 "Enable MCA to BINIT promotion",
501 "Enable MCA promotion",
502 "Enable BERR promotion"
503 };
504
505 static char *proc_features_16[]={ /* Feature set 16 */
506 "Disable ETM",
507 "Enable ETM",
508 "Enable MCA on half-way timer",
509 "Enable snoop WC",
510 NULL,
511 "Enable Fast Deferral",
512 "Disable MCA on memory aliasing",
513 "Enable RSB",
514 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
515 "DP system processor",
516 "Low Voltage",
517 "HT supported",
518 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
519 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
520 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
521 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
522 NULL, NULL, NULL, NULL, NULL
523 };
524
525 static char **proc_features[]={
526 proc_features_0,
527 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
528 NULL, NULL, NULL, NULL,
529 proc_features_16,
530 NULL, NULL, NULL, NULL,
531 };
532
533 static char *
534 feature_set_info(char *page, u64 avail, u64 status, u64 control, u64 set)
535 {
536 char *p = page;
537 char **vf, **v;
538 int i;
539
540 vf = v = proc_features[set];
541 for(i=0; i < 64; i++, avail >>=1, status >>=1, control >>=1) {
542
543 if (!(control)) /* No remaining bits set */
544 break;
545 if (!(avail & 0x1)) /* Print only bits that are available */
546 continue;
547 if (vf)
548 v = vf + i;
549 if ( v && *v ) {
550 p += sprintf(p, "%-40s : %s %s\n", *v,
551 avail & 0x1 ? (status & 0x1 ?
552 "On " : "Off"): "",
553 avail & 0x1 ? (control & 0x1 ?
554 "Ctrl" : "NoCtrl"): "");
555 } else {
556 p += sprintf(p, "Feature set %2ld bit %2d\t\t\t"
557 " : %s %s\n",
558 set, i,
559 avail & 0x1 ? (status & 0x1 ?
560 "On " : "Off"): "",
561 avail & 0x1 ? (control & 0x1 ?
562 "Ctrl" : "NoCtrl"): "");
563 }
564 }
565 return p;
566 }
567
568 static int
569 processor_info(char *page)
570 {
571 char *p = page;
572 u64 avail=1, status=1, control=1, feature_set=0;
573 s64 ret;
574
575 do {
576 ret = ia64_pal_proc_get_features(&avail, &status, &control,
577 feature_set);
578 if (ret < 0) {
579 return p - page;
580 }
581 if (ret == 1) {
582 feature_set++;
583 continue;
584 }
585
586 p = feature_set_info(p, avail, status, control, feature_set);
587
588 feature_set++;
589 } while(1);
590
591 return p - page;
592 }
593
594 static const char *bus_features[]={
595 NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
596 NULL,NULL,NULL,NULL,NULL,NULL,NULL, NULL,NULL,
597 NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
598 NULL,NULL,
599 "Request Bus Parking",
600 "Bus Lock Mask",
601 "Enable Half Transfer",
602 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
603 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
604 NULL, NULL, NULL, NULL,
605 "Enable Cache Line Repl. Shared",
606 "Enable Cache Line Repl. Exclusive",
607 "Disable Transaction Queuing",
608 "Disable Response Error Checking",
609 "Disable Bus Error Checking",
610 "Disable Bus Requester Internal Error Signalling",
611 "Disable Bus Requester Error Signalling",
612 "Disable Bus Initialization Event Checking",
613 "Disable Bus Initialization Event Signalling",
614 "Disable Bus Address Error Checking",
615 "Disable Bus Address Error Signalling",
616 "Disable Bus Data Error Checking"
617 };
618
619
620 static int
621 bus_info(char *page)
622 {
623 char *p = page;
624 const char **v = bus_features;
625 pal_bus_features_u_t av, st, ct;
626 u64 avail, status, control;
627 int i;
628 s64 ret;
629
630 if ((ret=ia64_pal_bus_get_features(&av, &st, &ct)) != 0) return 0;
631
632 avail = av.pal_bus_features_val;
633 status = st.pal_bus_features_val;
634 control = ct.pal_bus_features_val;
635
636 for(i=0; i < 64; i++, v++, avail >>=1, status >>=1, control >>=1) {
637 if ( ! *v ) continue;
638 p += sprintf(p, "%-48s : %s%s %s\n", *v,
639 avail & 0x1 ? "" : "NotImpl",
640 avail & 0x1 ? (status & 0x1 ? "On" : "Off"): "",
641 avail & 0x1 ? (control & 0x1 ? "Ctrl" : "NoCtrl"): "");
642 }
643 return p - page;
644 }
645
646 static int
647 version_info(char *page)
648 {
649 pal_version_u_t min_ver, cur_ver;
650 char *p = page;
651
652 if (ia64_pal_version(&min_ver, &cur_ver) != 0)
653 return 0;
654
655 p += sprintf(p,
656 "PAL_vendor : 0x%02x (min=0x%02x)\n"
657 "PAL_A : %02x.%02x (min=%02x.%02x)\n"
658 "PAL_B : %02x.%02x (min=%02x.%02x)\n",
659 cur_ver.pal_version_s.pv_pal_vendor,
660 min_ver.pal_version_s.pv_pal_vendor,
661 cur_ver.pal_version_s.pv_pal_a_model,
662 cur_ver.pal_version_s.pv_pal_a_rev,
663 min_ver.pal_version_s.pv_pal_a_model,
664 min_ver.pal_version_s.pv_pal_a_rev,
665 cur_ver.pal_version_s.pv_pal_b_model,
666 cur_ver.pal_version_s.pv_pal_b_rev,
667 min_ver.pal_version_s.pv_pal_b_model,
668 min_ver.pal_version_s.pv_pal_b_rev);
669 return p - page;
670 }
671
672 static int
673 perfmon_info(char *page)
674 {
675 char *p = page;
676 u64 pm_buffer[16];
677 pal_perf_mon_info_u_t pm_info;
678
679 if (ia64_pal_perf_mon_info(pm_buffer, &pm_info) != 0) return 0;
680
681 p += sprintf(p,
682 "PMC/PMD pairs : %d\n"
683 "Counter width : %d bits\n"
684 "Cycle event number : %d\n"
685 "Retired event number : %d\n"
686 "Implemented PMC : ",
687 pm_info.pal_perf_mon_info_s.generic, pm_info.pal_perf_mon_info_s.width,
688 pm_info.pal_perf_mon_info_s.cycles, pm_info.pal_perf_mon_info_s.retired);
689
690 p = bitregister_process(p, pm_buffer, 256);
691 p += sprintf(p, "\nImplemented PMD : ");
692 p = bitregister_process(p, pm_buffer+4, 256);
693 p += sprintf(p, "\nCycles count capable : ");
694 p = bitregister_process(p, pm_buffer+8, 256);
695 p += sprintf(p, "\nRetired bundles count capable : ");
696
697 #ifdef CONFIG_ITANIUM
698 /*
699 * PAL_PERF_MON_INFO reports that only PMC4 can be used to count CPU_CYCLES
700 * which is wrong, both PMC4 and PMD5 support it.
701 */
702 if (pm_buffer[12] == 0x10) pm_buffer[12]=0x30;
703 #endif
704
705 p = bitregister_process(p, pm_buffer+12, 256);
706
707 p += sprintf(p, "\n");
708
709 return p - page;
710 }
711
712 static int
713 frequency_info(char *page)
714 {
715 char *p = page;
716 struct pal_freq_ratio proc, itc, bus;
717 u64 base;
718
719 if (ia64_pal_freq_base(&base) == -1)
720 p += sprintf(p, "Output clock : not implemented\n");
721 else
722 p += sprintf(p, "Output clock : %ld ticks/s\n", base);
723
724 if (ia64_pal_freq_ratios(&proc, &bus, &itc) != 0) return 0;
725
726 p += sprintf(p,
727 "Processor/Clock ratio : %d/%d\n"
728 "Bus/Clock ratio : %d/%d\n"
729 "ITC/Clock ratio : %d/%d\n",
730 proc.num, proc.den, bus.num, bus.den, itc.num, itc.den);
731
732 return p - page;
733 }
734
735 static int
736 tr_info(char *page)
737 {
738 char *p = page;
739 s64 status;
740 pal_tr_valid_u_t tr_valid;
741 u64 tr_buffer[4];
742 pal_vm_info_1_u_t vm_info_1;
743 pal_vm_info_2_u_t vm_info_2;
744 u64 i, j;
745 u64 max[3], pgm;
746 struct ifa_reg {
747 u64 valid:1;
748 u64 ig:11;
749 u64 vpn:52;
750 } *ifa_reg;
751 struct itir_reg {
752 u64 rv1:2;
753 u64 ps:6;
754 u64 key:24;
755 u64 rv2:32;
756 } *itir_reg;
757 struct gr_reg {
758 u64 p:1;
759 u64 rv1:1;
760 u64 ma:3;
761 u64 a:1;
762 u64 d:1;
763 u64 pl:2;
764 u64 ar:3;
765 u64 ppn:38;
766 u64 rv2:2;
767 u64 ed:1;
768 u64 ig:11;
769 } *gr_reg;
770 struct rid_reg {
771 u64 ig1:1;
772 u64 rv1:1;
773 u64 ig2:6;
774 u64 rid:24;
775 u64 rv2:32;
776 } *rid_reg;
777
778 if ((status = ia64_pal_vm_summary(&vm_info_1, &vm_info_2)) !=0) {
779 printk(KERN_ERR "ia64_pal_vm_summary=%ld\n", status);
780 return 0;
781 }
782 max[0] = vm_info_1.pal_vm_info_1_s.max_itr_entry+1;
783 max[1] = vm_info_1.pal_vm_info_1_s.max_dtr_entry+1;
784
785 for (i=0; i < 2; i++ ) {
786 for (j=0; j < max[i]; j++) {
787
788 status = ia64_pal_tr_read(j, i, tr_buffer, &tr_valid);
789 if (status != 0) {
790 printk(KERN_ERR "palinfo: pal call failed on tr[%lu:%lu]=%ld\n",
791 i, j, status);
792 continue;
793 }
794
795 ifa_reg = (struct ifa_reg *)&tr_buffer[2];
796
797 if (ifa_reg->valid == 0) continue;
798
799 gr_reg = (struct gr_reg *)tr_buffer;
800 itir_reg = (struct itir_reg *)&tr_buffer[1];
801 rid_reg = (struct rid_reg *)&tr_buffer[3];
802
803 pgm = -1 << (itir_reg->ps - 12);
804 p += sprintf(p,
805 "%cTR%lu: av=%d pv=%d dv=%d mv=%d\n"
806 "\tppn : 0x%lx\n"
807 "\tvpn : 0x%lx\n"
808 "\tps : ",
809 "ID"[i], j,
810 tr_valid.pal_tr_valid_s.access_rights_valid,
811 tr_valid.pal_tr_valid_s.priv_level_valid,
812 tr_valid.pal_tr_valid_s.dirty_bit_valid,
813 tr_valid.pal_tr_valid_s.mem_attr_valid,
814 (gr_reg->ppn & pgm)<< 12, (ifa_reg->vpn & pgm)<< 12);
815
816 p = bitvector_process(p, 1<< itir_reg->ps);
817
818 p += sprintf(p,
819 "\n\tpl : %d\n"
820 "\tar : %d\n"
821 "\trid : %x\n"
822 "\tp : %d\n"
823 "\tma : %d\n"
824 "\td : %d\n",
825 gr_reg->pl, gr_reg->ar, rid_reg->rid, gr_reg->p, gr_reg->ma,
826 gr_reg->d);
827 }
828 }
829 return p - page;
830 }
831
832
833
834 /*
835 * List {name,function} pairs for every entry in /proc/palinfo/cpu*
836 */
837 static palinfo_entry_t palinfo_entries[]={
838 { "version_info", version_info, },
839 { "vm_info", vm_info, },
840 { "cache_info", cache_info, },
841 { "power_info", power_info, },
842 { "register_info", register_info, },
843 { "processor_info", processor_info, },
844 { "perfmon_info", perfmon_info, },
845 { "frequency_info", frequency_info, },
846 { "bus_info", bus_info },
847 { "tr_info", tr_info, }
848 };
849
850 #define NR_PALINFO_ENTRIES (int) ARRAY_SIZE(palinfo_entries)
851
852 /*
853 * this array is used to keep track of the proc entries we create. This is
854 * required in the module mode when we need to remove all entries. The procfs code
855 * does not do recursion of deletion
856 *
857 * Notes:
858 * - +1 accounts for the cpuN directory entry in /proc/pal
859 */
860 #define NR_PALINFO_PROC_ENTRIES (NR_CPUS*(NR_PALINFO_ENTRIES+1))
861
862 static struct proc_dir_entry *palinfo_proc_entries[NR_PALINFO_PROC_ENTRIES];
863 static struct proc_dir_entry *palinfo_dir;
864
865 /*
866 * This data structure is used to pass which cpu,function is being requested
867 * It must fit in a 64bit quantity to be passed to the proc callback routine
868 *
869 * In SMP mode, when we get a request for another CPU, we must call that
870 * other CPU using IPI and wait for the result before returning.
871 */
872 typedef union {
873 u64 value;
874 struct {
875 unsigned req_cpu: 32; /* for which CPU this info is */
876 unsigned func_id: 32; /* which function is requested */
877 } pal_func_cpu;
878 } pal_func_cpu_u_t;
879
880 #define req_cpu pal_func_cpu.req_cpu
881 #define func_id pal_func_cpu.func_id
882
883 #ifdef CONFIG_SMP
884
885 /*
886 * used to hold information about final function to call
887 */
888 typedef struct {
889 palinfo_func_t func; /* pointer to function to call */
890 char *page; /* buffer to store results */
891 int ret; /* return value from call */
892 } palinfo_smp_data_t;
893
894
895 /*
896 * this function does the actual final call and he called
897 * from the smp code, i.e., this is the palinfo callback routine
898 */
899 static void
900 palinfo_smp_call(void *info)
901 {
902 palinfo_smp_data_t *data = (palinfo_smp_data_t *)info;
903 if (data == NULL) {
904 printk(KERN_ERR "palinfo: data pointer is NULL\n");
905 data->ret = 0; /* no output */
906 return;
907 }
908 /* does this actual call */
909 data->ret = (*data->func)(data->page);
910 }
911
912 /*
913 * function called to trigger the IPI, we need to access a remote CPU
914 * Return:
915 * 0 : error or nothing to output
916 * otherwise how many bytes in the "page" buffer were written
917 */
918 static
919 int palinfo_handle_smp(pal_func_cpu_u_t *f, char *page)
920 {
921 palinfo_smp_data_t ptr;
922 int ret;
923
924 ptr.func = palinfo_entries[f->func_id].proc_read;
925 ptr.page = page;
926 ptr.ret = 0; /* just in case */
927
928
929 /* will send IPI to other CPU and wait for completion of remote call */
930 if ((ret=smp_call_function_single(f->req_cpu, palinfo_smp_call, &ptr, 0, 1))) {
931 printk(KERN_ERR "palinfo: remote CPU call from %d to %d on function %d: "
932 "error %d\n", smp_processor_id(), f->req_cpu, f->func_id, ret);
933 return 0;
934 }
935 return ptr.ret;
936 }
937 #else /* ! CONFIG_SMP */
938 static
939 int palinfo_handle_smp(pal_func_cpu_u_t *f, char *page)
940 {
941 printk(KERN_ERR "palinfo: should not be called with non SMP kernel\n");
942 return 0;
943 }
944 #endif /* CONFIG_SMP */
945
946 /*
947 * Entry point routine: all calls go through this function
948 */
949 static int
950 palinfo_read_entry(char *page, char **start, off_t off, int count, int *eof, void *data)
951 {
952 int len=0;
953 pal_func_cpu_u_t *f = (pal_func_cpu_u_t *)&data;
954
955 /*
956 * in SMP mode, we may need to call another CPU to get correct
957 * information. PAL, by definition, is processor specific
958 */
959 if (f->req_cpu == get_cpu())
960 len = (*palinfo_entries[f->func_id].proc_read)(page);
961 else
962 len = palinfo_handle_smp(f, page);
963
964 put_cpu();
965
966 if (len <= off+count) *eof = 1;
967
968 *start = page + off;
969 len -= off;
970
971 if (len>count) len = count;
972 if (len<0) len = 0;
973
974 return len;
975 }
976
977 static void __cpuinit
978 create_palinfo_proc_entries(unsigned int cpu)
979 {
980 # define CPUSTR "cpu%d"
981
982 pal_func_cpu_u_t f;
983 struct proc_dir_entry **pdir;
984 struct proc_dir_entry *cpu_dir;
985 int j;
986 char cpustr[sizeof(CPUSTR)];
987
988
989 /*
990 * we keep track of created entries in a depth-first order for
991 * cleanup purposes. Each entry is stored into palinfo_proc_entries
992 */
993 sprintf(cpustr,CPUSTR, cpu);
994
995 cpu_dir = proc_mkdir(cpustr, palinfo_dir);
996
997 f.req_cpu = cpu;
998
999 /*
1000 * Compute the location to store per cpu entries
1001 * We dont store the top level entry in this list, but
1002 * remove it finally after removing all cpu entries.
1003 */
1004 pdir = &palinfo_proc_entries[cpu*(NR_PALINFO_ENTRIES+1)];
1005 *pdir++ = cpu_dir;
1006 for (j=0; j < NR_PALINFO_ENTRIES; j++) {
1007 f.func_id = j;
1008 *pdir = create_proc_read_entry(
1009 palinfo_entries[j].name, 0, cpu_dir,
1010 palinfo_read_entry, (void *)f.value);
1011 if (*pdir)
1012 (*pdir)->owner = THIS_MODULE;
1013 pdir++;
1014 }
1015 }
1016
1017 static void
1018 remove_palinfo_proc_entries(unsigned int hcpu)
1019 {
1020 int j;
1021 struct proc_dir_entry *cpu_dir, **pdir;
1022
1023 pdir = &palinfo_proc_entries[hcpu*(NR_PALINFO_ENTRIES+1)];
1024 cpu_dir = *pdir;
1025 *pdir++=NULL;
1026 for (j=0; j < (NR_PALINFO_ENTRIES); j++) {
1027 if ((*pdir)) {
1028 remove_proc_entry ((*pdir)->name, cpu_dir);
1029 *pdir ++= NULL;
1030 }
1031 }
1032
1033 if (cpu_dir) {
1034 remove_proc_entry(cpu_dir->name, palinfo_dir);
1035 }
1036 }
1037
1038 static int __cpuinit palinfo_cpu_callback(struct notifier_block *nfb,
1039 unsigned long action, void *hcpu)
1040 {
1041 unsigned int hotcpu = (unsigned long)hcpu;
1042
1043 switch (action) {
1044 case CPU_ONLINE:
1045 case CPU_ONLINE_FROZEN:
1046 create_palinfo_proc_entries(hotcpu);
1047 break;
1048 case CPU_DEAD:
1049 case CPU_DEAD_FROZEN:
1050 remove_palinfo_proc_entries(hotcpu);
1051 break;
1052 }
1053 return NOTIFY_OK;
1054 }
1055
1056 static struct notifier_block palinfo_cpu_notifier __cpuinitdata =
1057 {
1058 .notifier_call = palinfo_cpu_callback,
1059 .priority = 0,
1060 };
1061
1062 static int __init
1063 palinfo_init(void)
1064 {
1065 int i = 0;
1066
1067 printk(KERN_INFO "PAL Information Facility v%s\n", PALINFO_VERSION);
1068 palinfo_dir = proc_mkdir("pal", NULL);
1069
1070 /* Create palinfo dirs in /proc for all online cpus */
1071 for_each_online_cpu(i) {
1072 create_palinfo_proc_entries(i);
1073 }
1074
1075 /* Register for future delivery via notify registration */
1076 register_hotcpu_notifier(&palinfo_cpu_notifier);
1077
1078 return 0;
1079 }
1080
1081 static void __exit
1082 palinfo_exit(void)
1083 {
1084 int i = 0;
1085
1086 /* remove all nodes: depth first pass. Could optimize this */
1087 for_each_online_cpu(i) {
1088 remove_palinfo_proc_entries(i);
1089 }
1090
1091 /*
1092 * Remove the top level entry finally
1093 */
1094 remove_proc_entry(palinfo_dir->name, NULL);
1095
1096 /*
1097 * Unregister from cpu notifier callbacks
1098 */
1099 unregister_hotcpu_notifier(&palinfo_cpu_notifier);
1100 }
1101
1102 module_init(palinfo_init);
1103 module_exit(palinfo_exit);
linux-next