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nfsd4: typo logical vs bitwise negate for want_mask
[linux-btrfs-devel.git] / arch / sparc / kernel / mdesc.c
blobacaebb63c4fd4b7a7f42e0fc6d40befe799168c3
1 /* mdesc.c: Sun4V machine description handling.
2 *
3 * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
4 */
5 #include <linux/kernel.h>
6 #include <linux/types.h>
7 #include <linux/memblock.h>
8 #include <linux/log2.h>
9 #include <linux/list.h>
10 #include <linux/slab.h>
11 #include <linux/mm.h>
12 #include <linux/miscdevice.h>
13 #include <linux/bootmem.h>
14
15 #include <asm/cpudata.h>
16 #include <asm/hypervisor.h>
17 #include <asm/mdesc.h>
18 #include <asm/prom.h>
19 #include <asm/oplib.h>
20 #include <asm/smp.h>
21
22 /* Unlike the OBP device tree, the machine description is a full-on
23 * DAG. An arbitrary number of ARCs are possible from one
24 * node to other nodes and thus we can't use the OBP device_node
25 * data structure to represent these nodes inside of the kernel.
26 *
27 * Actually, it isn't even a DAG, because there are back pointers
28 * which create cycles in the graph.
29 *
30 * mdesc_hdr and mdesc_elem describe the layout of the data structure
31 * we get from the Hypervisor.
32 */
33 struct mdesc_hdr {
34 u32 version; /* Transport version */
35 u32 node_sz; /* node block size */
36 u32 name_sz; /* name block size */
37 u32 data_sz; /* data block size */
38 } __attribute__((aligned(16)));
39
40 struct mdesc_elem {
41 u8 tag;
42 #define MD_LIST_END 0x00
43 #define MD_NODE 0x4e
44 #define MD_NODE_END 0x45
45 #define MD_NOOP 0x20
46 #define MD_PROP_ARC 0x61
47 #define MD_PROP_VAL 0x76
48 #define MD_PROP_STR 0x73
49 #define MD_PROP_DATA 0x64
50 u8 name_len;
51 u16 resv;
52 u32 name_offset;
53 union {
54 struct {
55 u32 data_len;
56 u32 data_offset;
57 } data;
58 u64 val;
59 } d;
60 };
61
62 struct mdesc_mem_ops {
63 struct mdesc_handle *(*alloc)(unsigned int mdesc_size);
64 void (*free)(struct mdesc_handle *handle);
65 };
66
67 struct mdesc_handle {
68 struct list_head list;
69 struct mdesc_mem_ops *mops;
70 void *self_base;
71 atomic_t refcnt;
72 unsigned int handle_size;
73 struct mdesc_hdr mdesc;
74 };
75
76 static void mdesc_handle_init(struct mdesc_handle *hp,
77 unsigned int handle_size,
78 void *base)
79 {
80 BUG_ON(((unsigned long)&hp->mdesc) & (16UL - 1));
81
82 memset(hp, 0, handle_size);
83 INIT_LIST_HEAD(&hp->list);
84 hp->self_base = base;
85 atomic_set(&hp->refcnt, 1);
86 hp->handle_size = handle_size;
87 }
88
89 static struct mdesc_handle * __init mdesc_memblock_alloc(unsigned int mdesc_size)
90 {
91 unsigned int handle_size, alloc_size;
92 struct mdesc_handle *hp;
93 unsigned long paddr;
94
95 handle_size = (sizeof(struct mdesc_handle) -
96 sizeof(struct mdesc_hdr) +
97 mdesc_size);
98 alloc_size = PAGE_ALIGN(handle_size);
99
100 paddr = memblock_alloc(alloc_size, PAGE_SIZE);
101
102 hp = NULL;
103 if (paddr) {
104 hp = __va(paddr);
105 mdesc_handle_init(hp, handle_size, hp);
106 }
107 return hp;
108 }
109
110 static void __init mdesc_memblock_free(struct mdesc_handle *hp)
111 {
112 unsigned int alloc_size;
113 unsigned long start;
114
115 BUG_ON(atomic_read(&hp->refcnt) != 0);
116 BUG_ON(!list_empty(&hp->list));
117
118 alloc_size = PAGE_ALIGN(hp->handle_size);
119 start = __pa(hp);
120 free_bootmem_late(start, alloc_size);
121 }
122
123 static struct mdesc_mem_ops memblock_mdesc_ops = {
124 .alloc = mdesc_memblock_alloc,
125 .free = mdesc_memblock_free,
126 };
127
128 static struct mdesc_handle *mdesc_kmalloc(unsigned int mdesc_size)
129 {
130 unsigned int handle_size;
131 void *base;
132
133 handle_size = (sizeof(struct mdesc_handle) -
134 sizeof(struct mdesc_hdr) +
135 mdesc_size);
136
137 base = kmalloc(handle_size + 15, GFP_KERNEL | __GFP_NOFAIL);
138 if (base) {
139 struct mdesc_handle *hp;
140 unsigned long addr;
141
142 addr = (unsigned long)base;
143 addr = (addr + 15UL) & ~15UL;
144 hp = (struct mdesc_handle *) addr;
145
146 mdesc_handle_init(hp, handle_size, base);
147 return hp;
148 }
149
150 return NULL;
151 }
152
153 static void mdesc_kfree(struct mdesc_handle *hp)
154 {
155 BUG_ON(atomic_read(&hp->refcnt) != 0);
156 BUG_ON(!list_empty(&hp->list));
157
158 kfree(hp->self_base);
159 }
160
161 static struct mdesc_mem_ops kmalloc_mdesc_memops = {
162 .alloc = mdesc_kmalloc,
163 .free = mdesc_kfree,
164 };
165
166 static struct mdesc_handle *mdesc_alloc(unsigned int mdesc_size,
167 struct mdesc_mem_ops *mops)
168 {
169 struct mdesc_handle *hp = mops->alloc(mdesc_size);
170
171 if (hp)
172 hp->mops = mops;
173
174 return hp;
175 }
176
177 static void mdesc_free(struct mdesc_handle *hp)
178 {
179 hp->mops->free(hp);
180 }
181
182 static struct mdesc_handle *cur_mdesc;
183 static LIST_HEAD(mdesc_zombie_list);
184 static DEFINE_SPINLOCK(mdesc_lock);
185
186 struct mdesc_handle *mdesc_grab(void)
187 {
188 struct mdesc_handle *hp;
189 unsigned long flags;
190
191 spin_lock_irqsave(&mdesc_lock, flags);
192 hp = cur_mdesc;
193 if (hp)
194 atomic_inc(&hp->refcnt);
195 spin_unlock_irqrestore(&mdesc_lock, flags);
196
197 return hp;
198 }
199 EXPORT_SYMBOL(mdesc_grab);
200
201 void mdesc_release(struct mdesc_handle *hp)
202 {
203 unsigned long flags;
204
205 spin_lock_irqsave(&mdesc_lock, flags);
206 if (atomic_dec_and_test(&hp->refcnt)) {
207 list_del_init(&hp->list);
208 hp->mops->free(hp);
209 }
210 spin_unlock_irqrestore(&mdesc_lock, flags);
211 }
212 EXPORT_SYMBOL(mdesc_release);
213
214 static DEFINE_MUTEX(mdesc_mutex);
215 static struct mdesc_notifier_client *client_list;
216
217 void mdesc_register_notifier(struct mdesc_notifier_client *client)
218 {
219 u64 node;
220
221 mutex_lock(&mdesc_mutex);
222 client->next = client_list;
223 client_list = client;
224
225 mdesc_for_each_node_by_name(cur_mdesc, node, client->node_name)
226 client->add(cur_mdesc, node);
227
228 mutex_unlock(&mdesc_mutex);
229 }
230
231 static const u64 *parent_cfg_handle(struct mdesc_handle *hp, u64 node)
232 {
233 const u64 *id;
234 u64 a;
235
236 id = NULL;
237 mdesc_for_each_arc(a, hp, node, MDESC_ARC_TYPE_BACK) {
238 u64 target;
239
240 target = mdesc_arc_target(hp, a);
241 id = mdesc_get_property(hp, target,
242 "cfg-handle", NULL);
243 if (id)
244 break;
245 }
246
247 return id;
248 }
249
250 /* Run 'func' on nodes which are in A but not in B. */
251 static void invoke_on_missing(const char *name,
252 struct mdesc_handle *a,
253 struct mdesc_handle *b,
254 void (*func)(struct mdesc_handle *, u64))
255 {
256 u64 node;
257
258 mdesc_for_each_node_by_name(a, node, name) {
259 int found = 0, is_vdc_port = 0;
260 const char *name_prop;
261 const u64 *id;
262 u64 fnode;
263
264 name_prop = mdesc_get_property(a, node, "name", NULL);
265 if (name_prop && !strcmp(name_prop, "vdc-port")) {
266 is_vdc_port = 1;
267 id = parent_cfg_handle(a, node);
268 } else
269 id = mdesc_get_property(a, node, "id", NULL);
270
271 if (!id) {
272 printk(KERN_ERR "MD: Cannot find ID for %s node.\n",
273 (name_prop ? name_prop : name));
274 continue;
275 }
276
277 mdesc_for_each_node_by_name(b, fnode, name) {
278 const u64 *fid;
279
280 if (is_vdc_port) {
281 name_prop = mdesc_get_property(b, fnode,
282 "name", NULL);
283 if (!name_prop ||
284 strcmp(name_prop, "vdc-port"))
285 continue;
286 fid = parent_cfg_handle(b, fnode);
287 if (!fid) {
288 printk(KERN_ERR "MD: Cannot find ID "
289 "for vdc-port node.\n");
290 continue;
291 }
292 } else
293 fid = mdesc_get_property(b, fnode,
294 "id", NULL);
295
296 if (*id == *fid) {
297 found = 1;
298 break;
299 }
300 }
301 if (!found)
302 func(a, node);
303 }
304 }
305
306 static void notify_one(struct mdesc_notifier_client *p,
307 struct mdesc_handle *old_hp,
308 struct mdesc_handle *new_hp)
309 {
310 invoke_on_missing(p->node_name, old_hp, new_hp, p->remove);
311 invoke_on_missing(p->node_name, new_hp, old_hp, p->add);
312 }
313
314 static void mdesc_notify_clients(struct mdesc_handle *old_hp,
315 struct mdesc_handle *new_hp)
316 {
317 struct mdesc_notifier_client *p = client_list;
318
319 while (p) {
320 notify_one(p, old_hp, new_hp);
321 p = p->next;
322 }
323 }
324
325 void mdesc_update(void)
326 {
327 unsigned long len, real_len, status;
328 struct mdesc_handle *hp, *orig_hp;
329 unsigned long flags;
330
331 mutex_lock(&mdesc_mutex);
332
333 (void) sun4v_mach_desc(0UL, 0UL, &len);
334
335 hp = mdesc_alloc(len, &kmalloc_mdesc_memops);
336 if (!hp) {
337 printk(KERN_ERR "MD: mdesc alloc fails\n");
338 goto out;
339 }
340
341 status = sun4v_mach_desc(__pa(&hp->mdesc), len, &real_len);
342 if (status != HV_EOK || real_len > len) {
343 printk(KERN_ERR "MD: mdesc reread fails with %lu\n",
344 status);
345 atomic_dec(&hp->refcnt);
346 mdesc_free(hp);
347 goto out;
348 }
349
350 spin_lock_irqsave(&mdesc_lock, flags);
351 orig_hp = cur_mdesc;
352 cur_mdesc = hp;
353 spin_unlock_irqrestore(&mdesc_lock, flags);
354
355 mdesc_notify_clients(orig_hp, hp);
356
357 spin_lock_irqsave(&mdesc_lock, flags);
358 if (atomic_dec_and_test(&orig_hp->refcnt))
359 mdesc_free(orig_hp);
360 else
361 list_add(&orig_hp->list, &mdesc_zombie_list);
362 spin_unlock_irqrestore(&mdesc_lock, flags);
363
364 out:
365 mutex_unlock(&mdesc_mutex);
366 }
367
368 static struct mdesc_elem *node_block(struct mdesc_hdr *mdesc)
369 {
370 return (struct mdesc_elem *) (mdesc + 1);
371 }
372
373 static void *name_block(struct mdesc_hdr *mdesc)
374 {
375 return ((void *) node_block(mdesc)) + mdesc->node_sz;
376 }
377
378 static void *data_block(struct mdesc_hdr *mdesc)
379 {
380 return ((void *) name_block(mdesc)) + mdesc->name_sz;
381 }
382
383 u64 mdesc_node_by_name(struct mdesc_handle *hp,
384 u64 from_node, const char *name)
385 {
386 struct mdesc_elem *ep = node_block(&hp->mdesc);
387 const char *names = name_block(&hp->mdesc);
388 u64 last_node = hp->mdesc.node_sz / 16;
389 u64 ret;
390
391 if (from_node == MDESC_NODE_NULL) {
392 ret = from_node = 0;
393 } else if (from_node >= last_node) {
394 return MDESC_NODE_NULL;
395 } else {
396 ret = ep[from_node].d.val;
397 }
398
399 while (ret < last_node) {
400 if (ep[ret].tag != MD_NODE)
401 return MDESC_NODE_NULL;
402 if (!strcmp(names + ep[ret].name_offset, name))
403 break;
404 ret = ep[ret].d.val;
405 }
406 if (ret >= last_node)
407 ret = MDESC_NODE_NULL;
408 return ret;
409 }
410 EXPORT_SYMBOL(mdesc_node_by_name);
411
412 const void *mdesc_get_property(struct mdesc_handle *hp, u64 node,
413 const char *name, int *lenp)
414 {
415 const char *names = name_block(&hp->mdesc);
416 u64 last_node = hp->mdesc.node_sz / 16;
417 void *data = data_block(&hp->mdesc);
418 struct mdesc_elem *ep;
419
420 if (node == MDESC_NODE_NULL || node >= last_node)
421 return NULL;
422
423 ep = node_block(&hp->mdesc) + node;
424 ep++;
425 for (; ep->tag != MD_NODE_END; ep++) {
426 void *val = NULL;
427 int len = 0;
428
429 switch (ep->tag) {
430 case MD_PROP_VAL:
431 val = &ep->d.val;
432 len = 8;
433 break;
434
435 case MD_PROP_STR:
436 case MD_PROP_DATA:
437 val = data + ep->d.data.data_offset;
438 len = ep->d.data.data_len;
439 break;
440
441 default:
442 break;
443 }
444 if (!val)
445 continue;
446
447 if (!strcmp(names + ep->name_offset, name)) {
448 if (lenp)
449 *lenp = len;
450 return val;
451 }
452 }
453
454 return NULL;
455 }
456 EXPORT_SYMBOL(mdesc_get_property);
457
458 u64 mdesc_next_arc(struct mdesc_handle *hp, u64 from, const char *arc_type)
459 {
460 struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
461 const char *names = name_block(&hp->mdesc);
462 u64 last_node = hp->mdesc.node_sz / 16;
463
464 if (from == MDESC_NODE_NULL || from >= last_node)
465 return MDESC_NODE_NULL;
466
467 ep = base + from;
468
469 ep++;
470 for (; ep->tag != MD_NODE_END; ep++) {
471 if (ep->tag != MD_PROP_ARC)
472 continue;
473
474 if (strcmp(names + ep->name_offset, arc_type))
475 continue;
476
477 return ep - base;
478 }
479
480 return MDESC_NODE_NULL;
481 }
482 EXPORT_SYMBOL(mdesc_next_arc);
483
484 u64 mdesc_arc_target(struct mdesc_handle *hp, u64 arc)
485 {
486 struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
487
488 ep = base + arc;
489
490 return ep->d.val;
491 }
492 EXPORT_SYMBOL(mdesc_arc_target);
493
494 const char *mdesc_node_name(struct mdesc_handle *hp, u64 node)
495 {
496 struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
497 const char *names = name_block(&hp->mdesc);
498 u64 last_node = hp->mdesc.node_sz / 16;
499
500 if (node == MDESC_NODE_NULL || node >= last_node)
501 return NULL;
502
503 ep = base + node;
504 if (ep->tag != MD_NODE)
505 return NULL;
506
507 return names + ep->name_offset;
508 }
509 EXPORT_SYMBOL(mdesc_node_name);
510
511 static u64 max_cpus = 64;
512
513 static void __init report_platform_properties(void)
514 {
515 struct mdesc_handle *hp = mdesc_grab();
516 u64 pn = mdesc_node_by_name(hp, MDESC_NODE_NULL, "platform");
517 const char *s;
518 const u64 *v;
519
520 if (pn == MDESC_NODE_NULL) {
521 prom_printf("No platform node in machine-description.\n");
522 prom_halt();
523 }
524
525 s = mdesc_get_property(hp, pn, "banner-name", NULL);
526 printk("PLATFORM: banner-name [%s]\n", s);
527 s = mdesc_get_property(hp, pn, "name", NULL);
528 printk("PLATFORM: name [%s]\n", s);
529
530 v = mdesc_get_property(hp, pn, "hostid", NULL);
531 if (v)
532 printk("PLATFORM: hostid [%08llx]\n", *v);
533 v = mdesc_get_property(hp, pn, "serial#", NULL);
534 if (v)
535 printk("PLATFORM: serial# [%08llx]\n", *v);
536 v = mdesc_get_property(hp, pn, "stick-frequency", NULL);
537 printk("PLATFORM: stick-frequency [%08llx]\n", *v);
538 v = mdesc_get_property(hp, pn, "mac-address", NULL);
539 if (v)
540 printk("PLATFORM: mac-address [%llx]\n", *v);
541 v = mdesc_get_property(hp, pn, "watchdog-resolution", NULL);
542 if (v)
543 printk("PLATFORM: watchdog-resolution [%llu ms]\n", *v);
544 v = mdesc_get_property(hp, pn, "watchdog-max-timeout", NULL);
545 if (v)
546 printk("PLATFORM: watchdog-max-timeout [%llu ms]\n", *v);
547 v = mdesc_get_property(hp, pn, "max-cpus", NULL);
548 if (v) {
549 max_cpus = *v;
550 printk("PLATFORM: max-cpus [%llu]\n", max_cpus);
551 }
552
553 #ifdef CONFIG_SMP
554 {
555 int max_cpu, i;
556
557 if (v) {
558 max_cpu = *v;
559 if (max_cpu > NR_CPUS)
560 max_cpu = NR_CPUS;
561 } else {
562 max_cpu = NR_CPUS;
563 }
564 for (i = 0; i < max_cpu; i++)
565 set_cpu_possible(i, true);
566 }
567 #endif
568
569 mdesc_release(hp);
570 }
571
572 static void __cpuinit fill_in_one_cache(cpuinfo_sparc *c,
573 struct mdesc_handle *hp,
574 u64 mp)
575 {
576 const u64 *level = mdesc_get_property(hp, mp, "level", NULL);
577 const u64 *size = mdesc_get_property(hp, mp, "size", NULL);
578 const u64 *line_size = mdesc_get_property(hp, mp, "line-size", NULL);
579 const char *type;
580 int type_len;
581
582 type = mdesc_get_property(hp, mp, "type", &type_len);
583
584 switch (*level) {
585 case 1:
586 if (of_find_in_proplist(type, "instn", type_len)) {
587 c->icache_size = *size;
588 c->icache_line_size = *line_size;
589 } else if (of_find_in_proplist(type, "data", type_len)) {
590 c->dcache_size = *size;
591 c->dcache_line_size = *line_size;
592 }
593 break;
594
595 case 2:
596 c->ecache_size = *size;
597 c->ecache_line_size = *line_size;
598 break;
599
600 default:
601 break;
602 }
603
604 if (*level == 1) {
605 u64 a;
606
607 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
608 u64 target = mdesc_arc_target(hp, a);
609 const char *name = mdesc_node_name(hp, target);
610
611 if (!strcmp(name, "cache"))
612 fill_in_one_cache(c, hp, target);
613 }
614 }
615 }
616
617 static void __cpuinit mark_core_ids(struct mdesc_handle *hp, u64 mp, int core_id)
618 {
619 u64 a;
620
621 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) {
622 u64 t = mdesc_arc_target(hp, a);
623 const char *name;
624 const u64 *id;
625
626 name = mdesc_node_name(hp, t);
627 if (!strcmp(name, "cpu")) {
628 id = mdesc_get_property(hp, t, "id", NULL);
629 if (*id < NR_CPUS)
630 cpu_data(*id).core_id = core_id;
631 } else {
632 u64 j;
633
634 mdesc_for_each_arc(j, hp, t, MDESC_ARC_TYPE_BACK) {
635 u64 n = mdesc_arc_target(hp, j);
636 const char *n_name;
637
638 n_name = mdesc_node_name(hp, n);
639 if (strcmp(n_name, "cpu"))
640 continue;
641
642 id = mdesc_get_property(hp, n, "id", NULL);
643 if (*id < NR_CPUS)
644 cpu_data(*id).core_id = core_id;
645 }
646 }
647 }
648 }
649
650 static void __cpuinit set_core_ids(struct mdesc_handle *hp)
651 {
652 int idx;
653 u64 mp;
654
655 idx = 1;
656 mdesc_for_each_node_by_name(hp, mp, "cache") {
657 const u64 *level;
658 const char *type;
659 int len;
660
661 level = mdesc_get_property(hp, mp, "level", NULL);
662 if (*level != 1)
663 continue;
664
665 type = mdesc_get_property(hp, mp, "type", &len);
666 if (!of_find_in_proplist(type, "instn", len))
667 continue;
668
669 mark_core_ids(hp, mp, idx);
670
671 idx++;
672 }
673 }
674
675 static void __cpuinit mark_proc_ids(struct mdesc_handle *hp, u64 mp, int proc_id)
676 {
677 u64 a;
678
679 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) {
680 u64 t = mdesc_arc_target(hp, a);
681 const char *name;
682 const u64 *id;
683
684 name = mdesc_node_name(hp, t);
685 if (strcmp(name, "cpu"))
686 continue;
687
688 id = mdesc_get_property(hp, t, "id", NULL);
689 if (*id < NR_CPUS)
690 cpu_data(*id).proc_id = proc_id;
691 }
692 }
693
694 static void __cpuinit __set_proc_ids(struct mdesc_handle *hp, const char *exec_unit_name)
695 {
696 int idx;
697 u64 mp;
698
699 idx = 0;
700 mdesc_for_each_node_by_name(hp, mp, exec_unit_name) {
701 const char *type;
702 int len;
703
704 type = mdesc_get_property(hp, mp, "type", &len);
705 if (!of_find_in_proplist(type, "int", len) &&
706 !of_find_in_proplist(type, "integer", len))
707 continue;
708
709 mark_proc_ids(hp, mp, idx);
710
711 idx++;
712 }
713 }
714
715 static void __cpuinit set_proc_ids(struct mdesc_handle *hp)
716 {
717 __set_proc_ids(hp, "exec_unit");
718 __set_proc_ids(hp, "exec-unit");
719 }
720
721 static void __cpuinit get_one_mondo_bits(const u64 *p, unsigned int *mask,
722 unsigned long def, unsigned long max)
723 {
724 u64 val;
725
726 if (!p)
727 goto use_default;
728 val = *p;
729
730 if (!val || val >= 64)
731 goto use_default;
732
733 if (val > max)
734 val = max;
735
736 *mask = ((1U << val) * 64U) - 1U;
737 return;
738
739 use_default:
740 *mask = ((1U << def) * 64U) - 1U;
741 }
742
743 static void __cpuinit get_mondo_data(struct mdesc_handle *hp, u64 mp,
744 struct trap_per_cpu *tb)
745 {
746 static int printed;
747 const u64 *val;
748
749 val = mdesc_get_property(hp, mp, "q-cpu-mondo-#bits", NULL);
750 get_one_mondo_bits(val, &tb->cpu_mondo_qmask, 7, ilog2(max_cpus * 2));
751
752 val = mdesc_get_property(hp, mp, "q-dev-mondo-#bits", NULL);
753 get_one_mondo_bits(val, &tb->dev_mondo_qmask, 7, 8);
754
755 val = mdesc_get_property(hp, mp, "q-resumable-#bits", NULL);
756 get_one_mondo_bits(val, &tb->resum_qmask, 6, 7);
757
758 val = mdesc_get_property(hp, mp, "q-nonresumable-#bits", NULL);
759 get_one_mondo_bits(val, &tb->nonresum_qmask, 2, 2);
760 if (!printed++) {
761 pr_info("SUN4V: Mondo queue sizes "
762 "[cpu(%u) dev(%u) r(%u) nr(%u)]\n",
763 tb->cpu_mondo_qmask + 1,
764 tb->dev_mondo_qmask + 1,
765 tb->resum_qmask + 1,
766 tb->nonresum_qmask + 1);
767 }
768 }
769
770 static void * __cpuinit mdesc_iterate_over_cpus(void *(*func)(struct mdesc_handle *, u64, int, void *), void *arg, cpumask_t *mask)
771 {
772 struct mdesc_handle *hp = mdesc_grab();
773 void *ret = NULL;
774 u64 mp;
775
776 mdesc_for_each_node_by_name(hp, mp, "cpu") {
777 const u64 *id = mdesc_get_property(hp, mp, "id", NULL);
778 int cpuid = *id;
779
780 #ifdef CONFIG_SMP
781 if (cpuid >= NR_CPUS) {
782 printk(KERN_WARNING "Ignoring CPU %d which is "
783 ">= NR_CPUS (%d)\n",
784 cpuid, NR_CPUS);
785 continue;
786 }
787 if (!cpumask_test_cpu(cpuid, mask))
788 continue;
789 #endif
790
791 ret = func(hp, mp, cpuid, arg);
792 if (ret)
793 goto out;
794 }
795 out:
796 mdesc_release(hp);
797 return ret;
798 }
799
800 static void * __cpuinit record_one_cpu(struct mdesc_handle *hp, u64 mp, int cpuid, void *arg)
801 {
802 ncpus_probed++;
803 #ifdef CONFIG_SMP
804 set_cpu_present(cpuid, true);
805 #endif
806 return NULL;
807 }
808
809 void __cpuinit mdesc_populate_present_mask(cpumask_t *mask)
810 {
811 if (tlb_type != hypervisor)
812 return;
813
814 ncpus_probed = 0;
815 mdesc_iterate_over_cpus(record_one_cpu, NULL, mask);
816 }
817
818 static void * __cpuinit fill_in_one_cpu(struct mdesc_handle *hp, u64 mp, int cpuid, void *arg)
819 {
820 const u64 *cfreq = mdesc_get_property(hp, mp, "clock-frequency", NULL);
821 struct trap_per_cpu *tb;
822 cpuinfo_sparc *c;
823 u64 a;
824
825 #ifndef CONFIG_SMP
826 /* On uniprocessor we only want the values for the
827 * real physical cpu the kernel booted onto, however
828 * cpu_data() only has one entry at index 0.
829 */
830 if (cpuid != real_hard_smp_processor_id())
831 return NULL;
832 cpuid = 0;
833 #endif
834
835 c = &cpu_data(cpuid);
836 c->clock_tick = *cfreq;
837
838 tb = &trap_block[cpuid];
839 get_mondo_data(hp, mp, tb);
840
841 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
842 u64 j, t = mdesc_arc_target(hp, a);
843 const char *t_name;
844
845 t_name = mdesc_node_name(hp, t);
846 if (!strcmp(t_name, "cache")) {
847 fill_in_one_cache(c, hp, t);
848 continue;
849 }
850
851 mdesc_for_each_arc(j, hp, t, MDESC_ARC_TYPE_FWD) {
852 u64 n = mdesc_arc_target(hp, j);
853 const char *n_name;
854
855 n_name = mdesc_node_name(hp, n);
856 if (!strcmp(n_name, "cache"))
857 fill_in_one_cache(c, hp, n);
858 }
859 }
860
861 c->core_id = 0;
862 c->proc_id = -1;
863
864 return NULL;
865 }
866
867 void __cpuinit mdesc_fill_in_cpu_data(cpumask_t *mask)
868 {
869 struct mdesc_handle *hp;
870
871 mdesc_iterate_over_cpus(fill_in_one_cpu, NULL, mask);
872
873 #ifdef CONFIG_SMP
874 sparc64_multi_core = 1;
875 #endif
876
877 hp = mdesc_grab();
878
879 set_core_ids(hp);
880 set_proc_ids(hp);
881
882 mdesc_release(hp);
883
884 smp_fill_in_sib_core_maps();
885 }
886
887 static ssize_t mdesc_read(struct file *file, char __user *buf,
888 size_t len, loff_t *offp)
889 {
890 struct mdesc_handle *hp = mdesc_grab();
891 int err;
892
893 if (!hp)
894 return -ENODEV;
895
896 err = hp->handle_size;
897 if (len < hp->handle_size)
898 err = -EMSGSIZE;
899 else if (copy_to_user(buf, &hp->mdesc, hp->handle_size))
900 err = -EFAULT;
901 mdesc_release(hp);
902
903 return err;
904 }
905
906 static const struct file_operations mdesc_fops = {
907 .read = mdesc_read,
908 .owner = THIS_MODULE,
909 .llseek = noop_llseek,
910 };
911
912 static struct miscdevice mdesc_misc = {
913 .minor = MISC_DYNAMIC_MINOR,
914 .name = "mdesc",
915 .fops = &mdesc_fops,
916 };
917
918 static int __init mdesc_misc_init(void)
919 {
920 return misc_register(&mdesc_misc);
921 }
922
923 __initcall(mdesc_misc_init);
924
925 void __init sun4v_mdesc_init(void)
926 {
927 struct mdesc_handle *hp;
928 unsigned long len, real_len, status;
929
930 (void) sun4v_mach_desc(0UL, 0UL, &len);
931
932 printk("MDESC: Size is %lu bytes.\n", len);
933
934 hp = mdesc_alloc(len, &memblock_mdesc_ops);
935 if (hp == NULL) {
936 prom_printf("MDESC: alloc of %lu bytes failed.\n", len);
937 prom_halt();
938 }
939
940 status = sun4v_mach_desc(__pa(&hp->mdesc), len, &real_len);
941 if (status != HV_EOK || real_len > len) {
942 prom_printf("sun4v_mach_desc fails, err(%lu), "
943 "len(%lu), real_len(%lu)\n",
944 status, len, real_len);
945 mdesc_free(hp);
946 prom_halt();
947 }
948
949 cur_mdesc = hp;
950
951 report_platform_properties();
952 }
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