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6#include <linux/kernel.h>
7#include <linux/types.h>
8#include <linux/memblock.h>
9#include <linux/log2.h>
10#include <linux/list.h>
11#include <linux/slab.h>
12#include <linux/mm.h>
13#include <linux/miscdevice.h>
14#include <linux/bootmem.h>
15#include <linux/export.h>
16
17#include <asm/cpudata.h>
18#include <asm/hypervisor.h>
19#include <asm/mdesc.h>
20#include <asm/prom.h>
21#include <linux/uaccess.h>
22#include <asm/oplib.h>
23#include <asm/smp.h>
24
25
26
27
28
29
30
31
32
33
34
35
36struct mdesc_hdr {
37 u32 version;
38 u32 node_sz;
39 u32 name_sz;
40 u32 data_sz;
41} __attribute__((aligned(16)));
42
43struct mdesc_elem {
44 u8 tag;
45#define MD_LIST_END 0x00
46#define MD_NODE 0x4e
47#define MD_NODE_END 0x45
48#define MD_NOOP 0x20
49#define MD_PROP_ARC 0x61
50#define MD_PROP_VAL 0x76
51#define MD_PROP_STR 0x73
52#define MD_PROP_DATA 0x64
53 u8 name_len;
54 u16 resv;
55 u32 name_offset;
56 union {
57 struct {
58 u32 data_len;
59 u32 data_offset;
60 } data;
61 u64 val;
62 } d;
63};
64
65struct mdesc_mem_ops {
66 struct mdesc_handle *(*alloc)(unsigned int mdesc_size);
67 void (*free)(struct mdesc_handle *handle);
68};
69
70struct mdesc_handle {
71 struct list_head list;
72 struct mdesc_mem_ops *mops;
73 void *self_base;
74 atomic_t refcnt;
75 unsigned int handle_size;
76 struct mdesc_hdr mdesc;
77};
78
79typedef int (*mdesc_node_info_get_f)(struct mdesc_handle *, u64,
80 union md_node_info *);
81typedef void (*mdesc_node_info_rel_f)(union md_node_info *);
82typedef bool (*mdesc_node_match_f)(union md_node_info *, union md_node_info *);
83
84struct md_node_ops {
85 char *name;
86 mdesc_node_info_get_f get_info;
87 mdesc_node_info_rel_f rel_info;
88 mdesc_node_match_f node_match;
89};
90
91static int get_vdev_port_node_info(struct mdesc_handle *md, u64 node,
92 union md_node_info *node_info);
93static void rel_vdev_port_node_info(union md_node_info *node_info);
94static bool vdev_port_node_match(union md_node_info *a_node_info,
95 union md_node_info *b_node_info);
96
97static int get_ds_port_node_info(struct mdesc_handle *md, u64 node,
98 union md_node_info *node_info);
99static void rel_ds_port_node_info(union md_node_info *node_info);
100static bool ds_port_node_match(union md_node_info *a_node_info,
101 union md_node_info *b_node_info);
102
103
104static struct md_node_ops md_node_ops_table[] = {
105 {"virtual-device-port", get_vdev_port_node_info,
106 rel_vdev_port_node_info, vdev_port_node_match},
107 {"domain-services-port", get_ds_port_node_info,
108 rel_ds_port_node_info, ds_port_node_match},
109 {NULL, NULL, NULL, NULL}
110};
111
112static void mdesc_get_node_ops(const char *node_name,
113 mdesc_node_info_get_f *get_info_f,
114 mdesc_node_info_rel_f *rel_info_f,
115 mdesc_node_match_f *match_f)
116{
117 int i;
118
119 if (get_info_f)
120 *get_info_f = NULL;
121
122 if (rel_info_f)
123 *rel_info_f = NULL;
124
125 if (match_f)
126 *match_f = NULL;
127
128 if (!node_name)
129 return;
130
131 for (i = 0; md_node_ops_table[i].name != NULL; i++) {
132 if (strcmp(md_node_ops_table[i].name, node_name) == 0) {
133 if (get_info_f)
134 *get_info_f = md_node_ops_table[i].get_info;
135
136 if (rel_info_f)
137 *rel_info_f = md_node_ops_table[i].rel_info;
138
139 if (match_f)
140 *match_f = md_node_ops_table[i].node_match;
141
142 break;
143 }
144 }
145}
146
147static void mdesc_handle_init(struct mdesc_handle *hp,
148 unsigned int handle_size,
149 void *base)
150{
151 BUG_ON(((unsigned long)&hp->mdesc) & (16UL - 1));
152
153 memset(hp, 0, handle_size);
154 INIT_LIST_HEAD(&hp->list);
155 hp->self_base = base;
156 atomic_set(&hp->refcnt, 1);
157 hp->handle_size = handle_size;
158}
159
160static struct mdesc_handle * __init mdesc_memblock_alloc(unsigned int mdesc_size)
161{
162 unsigned int handle_size, alloc_size;
163 struct mdesc_handle *hp;
164 unsigned long paddr;
165
166 handle_size = (sizeof(struct mdesc_handle) -
167 sizeof(struct mdesc_hdr) +
168 mdesc_size);
169 alloc_size = PAGE_ALIGN(handle_size);
170
171 paddr = memblock_alloc(alloc_size, PAGE_SIZE);
172
173 hp = NULL;
174 if (paddr) {
175 hp = __va(paddr);
176 mdesc_handle_init(hp, handle_size, hp);
177 }
178 return hp;
179}
180
181static void __init mdesc_memblock_free(struct mdesc_handle *hp)
182{
183 unsigned int alloc_size;
184 unsigned long start;
185
186 BUG_ON(atomic_read(&hp->refcnt) != 0);
187 BUG_ON(!list_empty(&hp->list));
188
189 alloc_size = PAGE_ALIGN(hp->handle_size);
190 start = __pa(hp);
191 free_bootmem_late(start, alloc_size);
192}
193
194static struct mdesc_mem_ops memblock_mdesc_ops = {
195 .alloc = mdesc_memblock_alloc,
196 .free = mdesc_memblock_free,
197};
198
199static struct mdesc_handle *mdesc_kmalloc(unsigned int mdesc_size)
200{
201 unsigned int handle_size;
202 struct mdesc_handle *hp;
203 unsigned long addr;
204 void *base;
205
206 handle_size = (sizeof(struct mdesc_handle) -
207 sizeof(struct mdesc_hdr) +
208 mdesc_size);
209 base = kmalloc(handle_size + 15, GFP_KERNEL | __GFP_RETRY_MAYFAIL);
210 if (!base)
211 return NULL;
212
213 addr = (unsigned long)base;
214 addr = (addr + 15UL) & ~15UL;
215 hp = (struct mdesc_handle *) addr;
216
217 mdesc_handle_init(hp, handle_size, base);
218
219 return hp;
220}
221
222static void mdesc_kfree(struct mdesc_handle *hp)
223{
224 BUG_ON(atomic_read(&hp->refcnt) != 0);
225 BUG_ON(!list_empty(&hp->list));
226
227 kfree(hp->self_base);
228}
229
230static struct mdesc_mem_ops kmalloc_mdesc_memops = {
231 .alloc = mdesc_kmalloc,
232 .free = mdesc_kfree,
233};
234
235static struct mdesc_handle *mdesc_alloc(unsigned int mdesc_size,
236 struct mdesc_mem_ops *mops)
237{
238 struct mdesc_handle *hp = mops->alloc(mdesc_size);
239
240 if (hp)
241 hp->mops = mops;
242
243 return hp;
244}
245
246static void mdesc_free(struct mdesc_handle *hp)
247{
248 hp->mops->free(hp);
249}
250
251static struct mdesc_handle *cur_mdesc;
252static LIST_HEAD(mdesc_zombie_list);
253static DEFINE_SPINLOCK(mdesc_lock);
254
255struct mdesc_handle *mdesc_grab(void)
256{
257 struct mdesc_handle *hp;
258 unsigned long flags;
259
260 spin_lock_irqsave(&mdesc_lock, flags);
261 hp = cur_mdesc;
262 if (hp)
263 atomic_inc(&hp->refcnt);
264 spin_unlock_irqrestore(&mdesc_lock, flags);
265
266 return hp;
267}
268EXPORT_SYMBOL(mdesc_grab);
269
270void mdesc_release(struct mdesc_handle *hp)
271{
272 unsigned long flags;
273
274 spin_lock_irqsave(&mdesc_lock, flags);
275 if (atomic_dec_and_test(&hp->refcnt)) {
276 list_del_init(&hp->list);
277 hp->mops->free(hp);
278 }
279 spin_unlock_irqrestore(&mdesc_lock, flags);
280}
281EXPORT_SYMBOL(mdesc_release);
282
283static DEFINE_MUTEX(mdesc_mutex);
284static struct mdesc_notifier_client *client_list;
285
286void mdesc_register_notifier(struct mdesc_notifier_client *client)
287{
288 bool supported = false;
289 u64 node;
290 int i;
291
292 mutex_lock(&mdesc_mutex);
293
294
295 for (i = 0; md_node_ops_table[i].name != NULL; i++) {
296 if (strcmp(md_node_ops_table[i].name, client->node_name) == 0) {
297 supported = true;
298 break;
299 }
300 }
301
302 if (!supported) {
303 pr_err("MD: %s node not supported\n", client->node_name);
304 mutex_unlock(&mdesc_mutex);
305 return;
306 }
307
308 client->next = client_list;
309 client_list = client;
310
311 mdesc_for_each_node_by_name(cur_mdesc, node, client->node_name)
312 client->add(cur_mdesc, node, client->node_name);
313
314 mutex_unlock(&mdesc_mutex);
315}
316
317static const u64 *parent_cfg_handle(struct mdesc_handle *hp, u64 node)
318{
319 const u64 *id;
320 u64 a;
321
322 id = NULL;
323 mdesc_for_each_arc(a, hp, node, MDESC_ARC_TYPE_BACK) {
324 u64 target;
325
326 target = mdesc_arc_target(hp, a);
327 id = mdesc_get_property(hp, target,
328 "cfg-handle", NULL);
329 if (id)
330 break;
331 }
332
333 return id;
334}
335
336static int get_vdev_port_node_info(struct mdesc_handle *md, u64 node,
337 union md_node_info *node_info)
338{
339 const u64 *parent_cfg_hdlp;
340 const char *name;
341 const u64 *idp;
342
343
344
345
346
347
348
349 idp = mdesc_get_property(md, node, "id", NULL);
350 name = mdesc_get_property(md, node, "name", NULL);
351 parent_cfg_hdlp = parent_cfg_handle(md, node);
352
353 if (!idp || !name || !parent_cfg_hdlp)
354 return -1;
355
356 node_info->vdev_port.id = *idp;
357 node_info->vdev_port.name = kstrdup_const(name, GFP_KERNEL);
358 node_info->vdev_port.parent_cfg_hdl = *parent_cfg_hdlp;
359
360 return 0;
361}
362
363static void rel_vdev_port_node_info(union md_node_info *node_info)
364{
365 if (node_info && node_info->vdev_port.name) {
366 kfree_const(node_info->vdev_port.name);
367 node_info->vdev_port.name = NULL;
368 }
369}
370
371static bool vdev_port_node_match(union md_node_info *a_node_info,
372 union md_node_info *b_node_info)
373{
374 if (a_node_info->vdev_port.id != b_node_info->vdev_port.id)
375 return false;
376
377 if (a_node_info->vdev_port.parent_cfg_hdl !=
378 b_node_info->vdev_port.parent_cfg_hdl)
379 return false;
380
381 if (strncmp(a_node_info->vdev_port.name,
382 b_node_info->vdev_port.name, MDESC_MAX_STR_LEN) != 0)
383 return false;
384
385 return true;
386}
387
388static int get_ds_port_node_info(struct mdesc_handle *md, u64 node,
389 union md_node_info *node_info)
390{
391 const u64 *idp;
392
393
394 idp = mdesc_get_property(md, node, "id", NULL);
395 if (!idp)
396 return -1;
397
398 node_info->ds_port.id = *idp;
399
400 return 0;
401}
402
403static void rel_ds_port_node_info(union md_node_info *node_info)
404{
405}
406
407static bool ds_port_node_match(union md_node_info *a_node_info,
408 union md_node_info *b_node_info)
409{
410 if (a_node_info->ds_port.id != b_node_info->ds_port.id)
411 return false;
412
413 return true;
414}
415
416
417static void invoke_on_missing(const char *name,
418 struct mdesc_handle *a,
419 struct mdesc_handle *b,
420 void (*func)(struct mdesc_handle *, u64,
421 const char *node_name))
422{
423 mdesc_node_info_get_f get_info_func;
424 mdesc_node_info_rel_f rel_info_func;
425 mdesc_node_match_f node_match_func;
426 union md_node_info a_node_info;
427 union md_node_info b_node_info;
428 bool found;
429 u64 a_node;
430 u64 b_node;
431 int rv;
432
433
434
435
436
437 mdesc_get_node_ops(name, &get_info_func, &rel_info_func,
438 &node_match_func);
439
440
441 if (!get_info_func || !rel_info_func || !node_match_func) {
442 pr_err("MD: %s node type is not supported\n", name);
443 return;
444 }
445
446 mdesc_for_each_node_by_name(a, a_node, name) {
447 found = false;
448
449 rv = get_info_func(a, a_node, &a_node_info);
450 if (rv != 0) {
451 pr_err("MD: Cannot find 1 or more required match properties for %s node.\n",
452 name);
453 continue;
454 }
455
456
457 mdesc_for_each_node_by_name(b, b_node, name) {
458 rv = get_info_func(b, b_node, &b_node_info);
459 if (rv != 0)
460 continue;
461
462 if (node_match_func(&a_node_info, &b_node_info)) {
463 found = true;
464 rel_info_func(&b_node_info);
465 break;
466 }
467
468 rel_info_func(&b_node_info);
469 }
470
471 rel_info_func(&a_node_info);
472
473 if (!found)
474 func(a, a_node, name);
475 }
476}
477
478static void notify_one(struct mdesc_notifier_client *p,
479 struct mdesc_handle *old_hp,
480 struct mdesc_handle *new_hp)
481{
482 invoke_on_missing(p->node_name, old_hp, new_hp, p->remove);
483 invoke_on_missing(p->node_name, new_hp, old_hp, p->add);
484}
485
486static void mdesc_notify_clients(struct mdesc_handle *old_hp,
487 struct mdesc_handle *new_hp)
488{
489 struct mdesc_notifier_client *p = client_list;
490
491 while (p) {
492 notify_one(p, old_hp, new_hp);
493 p = p->next;
494 }
495}
496
497void mdesc_update(void)
498{
499 unsigned long len, real_len, status;
500 struct mdesc_handle *hp, *orig_hp;
501 unsigned long flags;
502
503 mutex_lock(&mdesc_mutex);
504
505 (void) sun4v_mach_desc(0UL, 0UL, &len);
506
507 hp = mdesc_alloc(len, &kmalloc_mdesc_memops);
508 if (!hp) {
509 printk(KERN_ERR "MD: mdesc alloc fails\n");
510 goto out;
511 }
512
513 status = sun4v_mach_desc(__pa(&hp->mdesc), len, &real_len);
514 if (status != HV_EOK || real_len > len) {
515 printk(KERN_ERR "MD: mdesc reread fails with %lu\n",
516 status);
517 atomic_dec(&hp->refcnt);
518 mdesc_free(hp);
519 goto out;
520 }
521
522 spin_lock_irqsave(&mdesc_lock, flags);
523 orig_hp = cur_mdesc;
524 cur_mdesc = hp;
525 spin_unlock_irqrestore(&mdesc_lock, flags);
526
527 mdesc_notify_clients(orig_hp, hp);
528
529 spin_lock_irqsave(&mdesc_lock, flags);
530 if (atomic_dec_and_test(&orig_hp->refcnt))
531 mdesc_free(orig_hp);
532 else
533 list_add(&orig_hp->list, &mdesc_zombie_list);
534 spin_unlock_irqrestore(&mdesc_lock, flags);
535
536out:
537 mutex_unlock(&mdesc_mutex);
538}
539
540u64 mdesc_get_node(struct mdesc_handle *hp, const char *node_name,
541 union md_node_info *node_info)
542{
543 mdesc_node_info_get_f get_info_func;
544 mdesc_node_info_rel_f rel_info_func;
545 mdesc_node_match_f node_match_func;
546 union md_node_info hp_node_info;
547 u64 hp_node;
548 int rv;
549
550 if (hp == NULL || node_name == NULL || node_info == NULL)
551 return MDESC_NODE_NULL;
552
553
554 mdesc_get_node_ops(node_name, &get_info_func, &rel_info_func,
555 &node_match_func);
556
557
558 if (!get_info_func || !rel_info_func || !node_match_func) {
559 pr_err("MD: %s node is not supported\n", node_name);
560 return -EINVAL;
561 }
562
563 mdesc_for_each_node_by_name(hp, hp_node, node_name) {
564 rv = get_info_func(hp, hp_node, &hp_node_info);
565 if (rv != 0)
566 continue;
567
568 if (node_match_func(node_info, &hp_node_info))
569 break;
570
571 rel_info_func(&hp_node_info);
572 }
573
574 rel_info_func(&hp_node_info);
575
576 return hp_node;
577}
578EXPORT_SYMBOL(mdesc_get_node);
579
580int mdesc_get_node_info(struct mdesc_handle *hp, u64 node,
581 const char *node_name, union md_node_info *node_info)
582{
583 mdesc_node_info_get_f get_info_func;
584 int rv;
585
586 if (hp == NULL || node == MDESC_NODE_NULL ||
587 node_name == NULL || node_info == NULL)
588 return -EINVAL;
589
590
591 mdesc_get_node_ops(node_name, &get_info_func, NULL, NULL);
592
593
594 if (get_info_func == NULL) {
595 pr_err("MD: %s node is not supported\n", node_name);
596 return -EINVAL;
597 }
598
599 rv = get_info_func(hp, node, node_info);
600 if (rv != 0) {
601 pr_err("MD: Cannot find 1 or more required match properties for %s node.\n",
602 node_name);
603 return -1;
604 }
605
606 return 0;
607}
608EXPORT_SYMBOL(mdesc_get_node_info);
609
610static struct mdesc_elem *node_block(struct mdesc_hdr *mdesc)
611{
612 return (struct mdesc_elem *) (mdesc + 1);
613}
614
615static void *name_block(struct mdesc_hdr *mdesc)
616{
617 return ((void *) node_block(mdesc)) + mdesc->node_sz;
618}
619
620static void *data_block(struct mdesc_hdr *mdesc)
621{
622 return ((void *) name_block(mdesc)) + mdesc->name_sz;
623}
624
625u64 mdesc_node_by_name(struct mdesc_handle *hp,
626 u64 from_node, const char *name)
627{
628 struct mdesc_elem *ep = node_block(&hp->mdesc);
629 const char *names = name_block(&hp->mdesc);
630 u64 last_node = hp->mdesc.node_sz / 16;
631 u64 ret;
632
633 if (from_node == MDESC_NODE_NULL) {
634 ret = from_node = 0;
635 } else if (from_node >= last_node) {
636 return MDESC_NODE_NULL;
637 } else {
638 ret = ep[from_node].d.val;
639 }
640
641 while (ret < last_node) {
642 if (ep[ret].tag != MD_NODE)
643 return MDESC_NODE_NULL;
644 if (!strcmp(names + ep[ret].name_offset, name))
645 break;
646 ret = ep[ret].d.val;
647 }
648 if (ret >= last_node)
649 ret = MDESC_NODE_NULL;
650 return ret;
651}
652EXPORT_SYMBOL(mdesc_node_by_name);
653
654const void *mdesc_get_property(struct mdesc_handle *hp, u64 node,
655 const char *name, int *lenp)
656{
657 const char *names = name_block(&hp->mdesc);
658 u64 last_node = hp->mdesc.node_sz / 16;
659 void *data = data_block(&hp->mdesc);
660 struct mdesc_elem *ep;
661
662 if (node == MDESC_NODE_NULL || node >= last_node)
663 return NULL;
664
665 ep = node_block(&hp->mdesc) + node;
666 ep++;
667 for (; ep->tag != MD_NODE_END; ep++) {
668 void *val = NULL;
669 int len = 0;
670
671 switch (ep->tag) {
672 case MD_PROP_VAL:
673 val = &ep->d.val;
674 len = 8;
675 break;
676
677 case MD_PROP_STR:
678 case MD_PROP_DATA:
679 val = data + ep->d.data.data_offset;
680 len = ep->d.data.data_len;
681 break;
682
683 default:
684 break;
685 }
686 if (!val)
687 continue;
688
689 if (!strcmp(names + ep->name_offset, name)) {
690 if (lenp)
691 *lenp = len;
692 return val;
693 }
694 }
695
696 return NULL;
697}
698EXPORT_SYMBOL(mdesc_get_property);
699
700u64 mdesc_next_arc(struct mdesc_handle *hp, u64 from, const char *arc_type)
701{
702 struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
703 const char *names = name_block(&hp->mdesc);
704 u64 last_node = hp->mdesc.node_sz / 16;
705
706 if (from == MDESC_NODE_NULL || from >= last_node)
707 return MDESC_NODE_NULL;
708
709 ep = base + from;
710
711 ep++;
712 for (; ep->tag != MD_NODE_END; ep++) {
713 if (ep->tag != MD_PROP_ARC)
714 continue;
715
716 if (strcmp(names + ep->name_offset, arc_type))
717 continue;
718
719 return ep - base;
720 }
721
722 return MDESC_NODE_NULL;
723}
724EXPORT_SYMBOL(mdesc_next_arc);
725
726u64 mdesc_arc_target(struct mdesc_handle *hp, u64 arc)
727{
728 struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
729
730 ep = base + arc;
731
732 return ep->d.val;
733}
734EXPORT_SYMBOL(mdesc_arc_target);
735
736const char *mdesc_node_name(struct mdesc_handle *hp, u64 node)
737{
738 struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
739 const char *names = name_block(&hp->mdesc);
740 u64 last_node = hp->mdesc.node_sz / 16;
741
742 if (node == MDESC_NODE_NULL || node >= last_node)
743 return NULL;
744
745 ep = base + node;
746 if (ep->tag != MD_NODE)
747 return NULL;
748
749 return names + ep->name_offset;
750}
751EXPORT_SYMBOL(mdesc_node_name);
752
753static u64 max_cpus = 64;
754
755static void __init report_platform_properties(void)
756{
757 struct mdesc_handle *hp = mdesc_grab();
758 u64 pn = mdesc_node_by_name(hp, MDESC_NODE_NULL, "platform");
759 const char *s;
760 const u64 *v;
761
762 if (pn == MDESC_NODE_NULL) {
763 prom_printf("No platform node in machine-description.\n");
764 prom_halt();
765 }
766
767 s = mdesc_get_property(hp, pn, "banner-name", NULL);
768 printk("PLATFORM: banner-name [%s]\n", s);
769 s = mdesc_get_property(hp, pn, "name", NULL);
770 printk("PLATFORM: name [%s]\n", s);
771
772 v = mdesc_get_property(hp, pn, "hostid", NULL);
773 if (v)
774 printk("PLATFORM: hostid [%08llx]\n", *v);
775 v = mdesc_get_property(hp, pn, "serial#", NULL);
776 if (v)
777 printk("PLATFORM: serial# [%08llx]\n", *v);
778 v = mdesc_get_property(hp, pn, "stick-frequency", NULL);
779 printk("PLATFORM: stick-frequency [%08llx]\n", *v);
780 v = mdesc_get_property(hp, pn, "mac-address", NULL);
781 if (v)
782 printk("PLATFORM: mac-address [%llx]\n", *v);
783 v = mdesc_get_property(hp, pn, "watchdog-resolution", NULL);
784 if (v)
785 printk("PLATFORM: watchdog-resolution [%llu ms]\n", *v);
786 v = mdesc_get_property(hp, pn, "watchdog-max-timeout", NULL);
787 if (v)
788 printk("PLATFORM: watchdog-max-timeout [%llu ms]\n", *v);
789 v = mdesc_get_property(hp, pn, "max-cpus", NULL);
790 if (v) {
791 max_cpus = *v;
792 printk("PLATFORM: max-cpus [%llu]\n", max_cpus);
793 }
794
795#ifdef CONFIG_SMP
796 {
797 int max_cpu, i;
798
799 if (v) {
800 max_cpu = *v;
801 if (max_cpu > NR_CPUS)
802 max_cpu = NR_CPUS;
803 } else {
804 max_cpu = NR_CPUS;
805 }
806 for (i = 0; i < max_cpu; i++)
807 set_cpu_possible(i, true);
808 }
809#endif
810
811 mdesc_release(hp);
812}
813
814static void fill_in_one_cache(cpuinfo_sparc *c, struct mdesc_handle *hp, u64 mp)
815{
816 const u64 *level = mdesc_get_property(hp, mp, "level", NULL);
817 const u64 *size = mdesc_get_property(hp, mp, "size", NULL);
818 const u64 *line_size = mdesc_get_property(hp, mp, "line-size", NULL);
819 const char *type;
820 int type_len;
821
822 type = mdesc_get_property(hp, mp, "type", &type_len);
823
824 switch (*level) {
825 case 1:
826 if (of_find_in_proplist(type, "instn", type_len)) {
827 c->icache_size = *size;
828 c->icache_line_size = *line_size;
829 } else if (of_find_in_proplist(type, "data", type_len)) {
830 c->dcache_size = *size;
831 c->dcache_line_size = *line_size;
832 }
833 break;
834
835 case 2:
836 c->ecache_size = *size;
837 c->ecache_line_size = *line_size;
838 break;
839
840 default:
841 break;
842 }
843
844 if (*level == 1) {
845 u64 a;
846
847 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
848 u64 target = mdesc_arc_target(hp, a);
849 const char *name = mdesc_node_name(hp, target);
850
851 if (!strcmp(name, "cache"))
852 fill_in_one_cache(c, hp, target);
853 }
854 }
855}
856
857static void find_back_node_value(struct mdesc_handle *hp, u64 node,
858 char *srch_val,
859 void (*func)(struct mdesc_handle *, u64, int),
860 u64 val, int depth)
861{
862 u64 arc;
863
864
865 if (depth == 0)
866 return;
867
868 mdesc_for_each_arc(arc, hp, node, MDESC_ARC_TYPE_BACK) {
869 u64 n = mdesc_arc_target(hp, arc);
870 const char *name = mdesc_node_name(hp, n);
871
872 if (!strcmp(srch_val, name))
873 (*func)(hp, n, val);
874
875 find_back_node_value(hp, n, srch_val, func, val, depth-1);
876 }
877}
878
879static void __mark_core_id(struct mdesc_handle *hp, u64 node,
880 int core_id)
881{
882 const u64 *id = mdesc_get_property(hp, node, "id", NULL);
883
884 if (*id < num_possible_cpus())
885 cpu_data(*id).core_id = core_id;
886}
887
888static void __mark_max_cache_id(struct mdesc_handle *hp, u64 node,
889 int max_cache_id)
890{
891 const u64 *id = mdesc_get_property(hp, node, "id", NULL);
892
893 if (*id < num_possible_cpus()) {
894 cpu_data(*id).max_cache_id = max_cache_id;
895
896
897
898
899
900 cpu_data(*id).sock_id = max_cache_id;
901 }
902}
903
904static void mark_core_ids(struct mdesc_handle *hp, u64 mp,
905 int core_id)
906{
907 find_back_node_value(hp, mp, "cpu", __mark_core_id, core_id, 10);
908}
909
910static void mark_max_cache_ids(struct mdesc_handle *hp, u64 mp,
911 int max_cache_id)
912{
913 find_back_node_value(hp, mp, "cpu", __mark_max_cache_id,
914 max_cache_id, 10);
915}
916
917static void set_core_ids(struct mdesc_handle *hp)
918{
919 int idx;
920 u64 mp;
921
922 idx = 1;
923
924
925
926
927 mdesc_for_each_node_by_name(hp, mp, "cache") {
928 const u64 *level;
929 const char *type;
930 int len;
931
932 level = mdesc_get_property(hp, mp, "level", NULL);
933 if (*level != 1)
934 continue;
935
936 type = mdesc_get_property(hp, mp, "type", &len);
937 if (!of_find_in_proplist(type, "instn", len))
938 continue;
939
940 mark_core_ids(hp, mp, idx);
941 idx++;
942 }
943}
944
945static int set_max_cache_ids_by_cache(struct mdesc_handle *hp, int level)
946{
947 u64 mp;
948 int idx = 1;
949 int fnd = 0;
950
951
952
953
954
955 mdesc_for_each_node_by_name(hp, mp, "cache") {
956 const u64 *cur_lvl;
957
958 cur_lvl = mdesc_get_property(hp, mp, "level", NULL);
959 if (*cur_lvl != level)
960 continue;
961 mark_max_cache_ids(hp, mp, idx);
962 idx++;
963 fnd = 1;
964 }
965 return fnd;
966}
967
968static void set_sock_ids_by_socket(struct mdesc_handle *hp, u64 mp)
969{
970 int idx = 1;
971
972 mdesc_for_each_node_by_name(hp, mp, "socket") {
973 u64 a;
974
975 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
976 u64 t = mdesc_arc_target(hp, a);
977 const char *name;
978 const u64 *id;
979
980 name = mdesc_node_name(hp, t);
981 if (strcmp(name, "cpu"))
982 continue;
983
984 id = mdesc_get_property(hp, t, "id", NULL);
985 if (*id < num_possible_cpus())
986 cpu_data(*id).sock_id = idx;
987 }
988 idx++;
989 }
990}
991
992static void set_sock_ids(struct mdesc_handle *hp)
993{
994 u64 mp;
995
996
997
998
999
1000 if (!set_max_cache_ids_by_cache(hp, 3))
1001 set_max_cache_ids_by_cache(hp, 2);
1002
1003
1004 mp = mdesc_node_by_name(hp, MDESC_NODE_NULL, "sockets");
1005 if (mp != MDESC_NODE_NULL)
1006 set_sock_ids_by_socket(hp, mp);
1007}
1008
1009static void mark_proc_ids(struct mdesc_handle *hp, u64 mp, int proc_id)
1010{
1011 u64 a;
1012
1013 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) {
1014 u64 t = mdesc_arc_target(hp, a);
1015 const char *name;
1016 const u64 *id;
1017
1018 name = mdesc_node_name(hp, t);
1019 if (strcmp(name, "cpu"))
1020 continue;
1021
1022 id = mdesc_get_property(hp, t, "id", NULL);
1023 if (*id < NR_CPUS)
1024 cpu_data(*id).proc_id = proc_id;
1025 }
1026}
1027
1028static void __set_proc_ids(struct mdesc_handle *hp, const char *exec_unit_name)
1029{
1030 int idx;
1031 u64 mp;
1032
1033 idx = 0;
1034 mdesc_for_each_node_by_name(hp, mp, exec_unit_name) {
1035 const char *type;
1036 int len;
1037
1038 type = mdesc_get_property(hp, mp, "type", &len);
1039 if (!of_find_in_proplist(type, "int", len) &&
1040 !of_find_in_proplist(type, "integer", len))
1041 continue;
1042
1043 mark_proc_ids(hp, mp, idx);
1044 idx++;
1045 }
1046}
1047
1048static void set_proc_ids(struct mdesc_handle *hp)
1049{
1050 __set_proc_ids(hp, "exec_unit");
1051 __set_proc_ids(hp, "exec-unit");
1052}
1053
1054static void get_one_mondo_bits(const u64 *p, unsigned int *mask,
1055 unsigned long def, unsigned long max)
1056{
1057 u64 val;
1058
1059 if (!p)
1060 goto use_default;
1061 val = *p;
1062
1063 if (!val || val >= 64)
1064 goto use_default;
1065
1066 if (val > max)
1067 val = max;
1068
1069 *mask = ((1U << val) * 64U) - 1U;
1070 return;
1071
1072use_default:
1073 *mask = ((1U << def) * 64U) - 1U;
1074}
1075
1076static void get_mondo_data(struct mdesc_handle *hp, u64 mp,
1077 struct trap_per_cpu *tb)
1078{
1079 static int printed;
1080 const u64 *val;
1081
1082 val = mdesc_get_property(hp, mp, "q-cpu-mondo-#bits", NULL);
1083 get_one_mondo_bits(val, &tb->cpu_mondo_qmask, 7, ilog2(max_cpus * 2));
1084
1085 val = mdesc_get_property(hp, mp, "q-dev-mondo-#bits", NULL);
1086 get_one_mondo_bits(val, &tb->dev_mondo_qmask, 7, 8);
1087
1088 val = mdesc_get_property(hp, mp, "q-resumable-#bits", NULL);
1089 get_one_mondo_bits(val, &tb->resum_qmask, 6, 7);
1090
1091 val = mdesc_get_property(hp, mp, "q-nonresumable-#bits", NULL);
1092 get_one_mondo_bits(val, &tb->nonresum_qmask, 2, 2);
1093 if (!printed++) {
1094 pr_info("SUN4V: Mondo queue sizes "
1095 "[cpu(%u) dev(%u) r(%u) nr(%u)]\n",
1096 tb->cpu_mondo_qmask + 1,
1097 tb->dev_mondo_qmask + 1,
1098 tb->resum_qmask + 1,
1099 tb->nonresum_qmask + 1);
1100 }
1101}
1102
1103static void *mdesc_iterate_over_cpus(void *(*func)(struct mdesc_handle *, u64, int, void *), void *arg, cpumask_t *mask)
1104{
1105 struct mdesc_handle *hp = mdesc_grab();
1106 void *ret = NULL;
1107 u64 mp;
1108
1109 mdesc_for_each_node_by_name(hp, mp, "cpu") {
1110 const u64 *id = mdesc_get_property(hp, mp, "id", NULL);
1111 int cpuid = *id;
1112
1113#ifdef CONFIG_SMP
1114 if (cpuid >= NR_CPUS) {
1115 printk(KERN_WARNING "Ignoring CPU %d which is "
1116 ">= NR_CPUS (%d)\n",
1117 cpuid, NR_CPUS);
1118 continue;
1119 }
1120 if (!cpumask_test_cpu(cpuid, mask))
1121 continue;
1122#endif
1123
1124 ret = func(hp, mp, cpuid, arg);
1125 if (ret)
1126 goto out;
1127 }
1128out:
1129 mdesc_release(hp);
1130 return ret;
1131}
1132
1133static void *record_one_cpu(struct mdesc_handle *hp, u64 mp, int cpuid,
1134 void *arg)
1135{
1136 ncpus_probed++;
1137#ifdef CONFIG_SMP
1138 set_cpu_present(cpuid, true);
1139#endif
1140 return NULL;
1141}
1142
1143void mdesc_populate_present_mask(cpumask_t *mask)
1144{
1145 if (tlb_type != hypervisor)
1146 return;
1147
1148 ncpus_probed = 0;
1149 mdesc_iterate_over_cpus(record_one_cpu, NULL, mask);
1150}
1151
1152static void * __init check_one_pgsz(struct mdesc_handle *hp, u64 mp, int cpuid, void *arg)
1153{
1154 const u64 *pgsz_prop = mdesc_get_property(hp, mp, "mmu-page-size-list", NULL);
1155 unsigned long *pgsz_mask = arg;
1156 u64 val;
1157
1158 val = (HV_PGSZ_MASK_8K | HV_PGSZ_MASK_64K |
1159 HV_PGSZ_MASK_512K | HV_PGSZ_MASK_4MB);
1160 if (pgsz_prop)
1161 val = *pgsz_prop;
1162
1163 if (!*pgsz_mask)
1164 *pgsz_mask = val;
1165 else
1166 *pgsz_mask &= val;
1167 return NULL;
1168}
1169
1170void __init mdesc_get_page_sizes(cpumask_t *mask, unsigned long *pgsz_mask)
1171{
1172 *pgsz_mask = 0;
1173 mdesc_iterate_over_cpus(check_one_pgsz, pgsz_mask, mask);
1174}
1175
1176static void *fill_in_one_cpu(struct mdesc_handle *hp, u64 mp, int cpuid,
1177 void *arg)
1178{
1179 const u64 *cfreq = mdesc_get_property(hp, mp, "clock-frequency", NULL);
1180 struct trap_per_cpu *tb;
1181 cpuinfo_sparc *c;
1182 u64 a;
1183
1184#ifndef CONFIG_SMP
1185
1186
1187
1188
1189 if (cpuid != real_hard_smp_processor_id())
1190 return NULL;
1191 cpuid = 0;
1192#endif
1193
1194 c = &cpu_data(cpuid);
1195 c->clock_tick = *cfreq;
1196
1197 tb = &trap_block[cpuid];
1198 get_mondo_data(hp, mp, tb);
1199
1200 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
1201 u64 j, t = mdesc_arc_target(hp, a);
1202 const char *t_name;
1203
1204 t_name = mdesc_node_name(hp, t);
1205 if (!strcmp(t_name, "cache")) {
1206 fill_in_one_cache(c, hp, t);
1207 continue;
1208 }
1209
1210 mdesc_for_each_arc(j, hp, t, MDESC_ARC_TYPE_FWD) {
1211 u64 n = mdesc_arc_target(hp, j);
1212 const char *n_name;
1213
1214 n_name = mdesc_node_name(hp, n);
1215 if (!strcmp(n_name, "cache"))
1216 fill_in_one_cache(c, hp, n);
1217 }
1218 }
1219
1220 c->core_id = 0;
1221 c->proc_id = -1;
1222
1223 return NULL;
1224}
1225
1226void mdesc_fill_in_cpu_data(cpumask_t *mask)
1227{
1228 struct mdesc_handle *hp;
1229
1230 mdesc_iterate_over_cpus(fill_in_one_cpu, NULL, mask);
1231
1232 hp = mdesc_grab();
1233
1234 set_core_ids(hp);
1235 set_proc_ids(hp);
1236 set_sock_ids(hp);
1237
1238 mdesc_release(hp);
1239
1240 smp_fill_in_sib_core_maps();
1241}
1242
1243
1244
1245
1246
1247
1248static int mdesc_open(struct inode *inode, struct file *file)
1249{
1250 struct mdesc_handle *hp = mdesc_grab();
1251
1252 if (!hp)
1253 return -ENODEV;
1254
1255 file->private_data = hp;
1256
1257 return 0;
1258}
1259
1260static ssize_t mdesc_read(struct file *file, char __user *buf,
1261 size_t len, loff_t *offp)
1262{
1263 struct mdesc_handle *hp = file->private_data;
1264 unsigned char *mdesc;
1265 int bytes_left, count = len;
1266
1267 if (*offp >= hp->handle_size)
1268 return 0;
1269
1270 bytes_left = hp->handle_size - *offp;
1271 if (count > bytes_left)
1272 count = bytes_left;
1273
1274 mdesc = (unsigned char *)&hp->mdesc;
1275 mdesc += *offp;
1276 if (!copy_to_user(buf, mdesc, count)) {
1277 *offp += count;
1278 return count;
1279 } else {
1280 return -EFAULT;
1281 }
1282}
1283
1284static loff_t mdesc_llseek(struct file *file, loff_t offset, int whence)
1285{
1286 struct mdesc_handle *hp = file->private_data;
1287
1288 return no_seek_end_llseek_size(file, offset, whence, hp->handle_size);
1289}
1290
1291
1292
1293
1294static int mdesc_close(struct inode *inode, struct file *file)
1295{
1296 mdesc_release(file->private_data);
1297 return 0;
1298}
1299
1300static const struct file_operations mdesc_fops = {
1301 .open = mdesc_open,
1302 .read = mdesc_read,
1303 .llseek = mdesc_llseek,
1304 .release = mdesc_close,
1305 .owner = THIS_MODULE,
1306};
1307
1308static struct miscdevice mdesc_misc = {
1309 .minor = MISC_DYNAMIC_MINOR,
1310 .name = "mdesc",
1311 .fops = &mdesc_fops,
1312};
1313
1314static int __init mdesc_misc_init(void)
1315{
1316 return misc_register(&mdesc_misc);
1317}
1318
1319__initcall(mdesc_misc_init);
1320
1321void __init sun4v_mdesc_init(void)
1322{
1323 struct mdesc_handle *hp;
1324 unsigned long len, real_len, status;
1325
1326 (void) sun4v_mach_desc(0UL, 0UL, &len);
1327
1328 printk("MDESC: Size is %lu bytes.\n", len);
1329
1330 hp = mdesc_alloc(len, &memblock_mdesc_ops);
1331 if (hp == NULL) {
1332 prom_printf("MDESC: alloc of %lu bytes failed.\n", len);
1333 prom_halt();
1334 }
1335
1336 status = sun4v_mach_desc(__pa(&hp->mdesc), len, &real_len);
1337 if (status != HV_EOK || real_len > len) {
1338 prom_printf("sun4v_mach_desc fails, err(%lu), "
1339 "len(%lu), real_len(%lu)\n",
1340 status, len, real_len);
1341 mdesc_free(hp);
1342 prom_halt();
1343 }
1344
1345 cur_mdesc = hp;
1346
1347 report_platform_properties();
1348}
1349