Commit | Line | Data |
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5cbc3073 DM |
1 | /* mdesc.c: Sun4V machine description handling. |
2 | * | |
3 | * Copyright (C) 2007 David S. Miller <davem@davemloft.net> | |
4 | */ | |
5 | #include <linux/kernel.h> | |
6 | #include <linux/types.h> | |
7 | #include <linux/bootmem.h> | |
8 | #include <linux/log2.h> | |
43fdf274 DM |
9 | #include <linux/list.h> |
10 | #include <linux/slab.h> | |
8f3fff20 | 11 | #include <linux/mm.h> |
5cbc3073 DM |
12 | |
13 | #include <asm/hypervisor.h> | |
14 | #include <asm/mdesc.h> | |
15 | #include <asm/prom.h> | |
16 | #include <asm/oplib.h> | |
17 | #include <asm/smp.h> | |
18 | ||
19 | /* Unlike the OBP device tree, the machine description is a full-on | |
20 | * DAG. An arbitrary number of ARCs are possible from one | |
21 | * node to other nodes and thus we can't use the OBP device_node | |
22 | * data structure to represent these nodes inside of the kernel. | |
23 | * | |
24 | * Actually, it isn't even a DAG, because there are back pointers | |
25 | * which create cycles in the graph. | |
26 | * | |
27 | * mdesc_hdr and mdesc_elem describe the layout of the data structure | |
28 | * we get from the Hypervisor. | |
29 | */ | |
30 | struct mdesc_hdr { | |
31 | u32 version; /* Transport version */ | |
32 | u32 node_sz; /* node block size */ | |
33 | u32 name_sz; /* name block size */ | |
34 | u32 data_sz; /* data block size */ | |
43fdf274 | 35 | } __attribute__((aligned(16))); |
5cbc3073 DM |
36 | |
37 | struct mdesc_elem { | |
38 | u8 tag; | |
39 | #define MD_LIST_END 0x00 | |
40 | #define MD_NODE 0x4e | |
41 | #define MD_NODE_END 0x45 | |
42 | #define MD_NOOP 0x20 | |
43 | #define MD_PROP_ARC 0x61 | |
44 | #define MD_PROP_VAL 0x76 | |
45 | #define MD_PROP_STR 0x73 | |
46 | #define MD_PROP_DATA 0x64 | |
47 | u8 name_len; | |
48 | u16 resv; | |
49 | u32 name_offset; | |
50 | union { | |
51 | struct { | |
52 | u32 data_len; | |
53 | u32 data_offset; | |
54 | } data; | |
55 | u64 val; | |
56 | } d; | |
57 | }; | |
58 | ||
43fdf274 DM |
59 | struct mdesc_mem_ops { |
60 | struct mdesc_handle *(*alloc)(unsigned int mdesc_size); | |
61 | void (*free)(struct mdesc_handle *handle); | |
62 | }; | |
5cbc3073 | 63 | |
43fdf274 DM |
64 | struct mdesc_handle { |
65 | struct list_head list; | |
66 | struct mdesc_mem_ops *mops; | |
67 | void *self_base; | |
68 | atomic_t refcnt; | |
69 | unsigned int handle_size; | |
70 | struct mdesc_hdr mdesc; | |
71 | }; | |
5cbc3073 | 72 | |
43fdf274 DM |
73 | static void mdesc_handle_init(struct mdesc_handle *hp, |
74 | unsigned int handle_size, | |
75 | void *base) | |
5cbc3073 | 76 | { |
43fdf274 DM |
77 | BUG_ON(((unsigned long)&hp->mdesc) & (16UL - 1)); |
78 | ||
79 | memset(hp, 0, handle_size); | |
80 | INIT_LIST_HEAD(&hp->list); | |
81 | hp->self_base = base; | |
82 | atomic_set(&hp->refcnt, 1); | |
83 | hp->handle_size = handle_size; | |
5cbc3073 DM |
84 | } |
85 | ||
1256efd5 | 86 | static struct mdesc_handle * __init mdesc_bootmem_alloc(unsigned int mdesc_size) |
5cbc3073 | 87 | { |
43fdf274 DM |
88 | struct mdesc_handle *hp; |
89 | unsigned int handle_size, alloc_size; | |
5cbc3073 | 90 | |
43fdf274 DM |
91 | handle_size = (sizeof(struct mdesc_handle) - |
92 | sizeof(struct mdesc_hdr) + | |
93 | mdesc_size); | |
94 | alloc_size = PAGE_ALIGN(handle_size); | |
5cbc3073 | 95 | |
43fdf274 DM |
96 | hp = __alloc_bootmem(alloc_size, PAGE_SIZE, 0UL); |
97 | if (hp) | |
98 | mdesc_handle_init(hp, handle_size, hp); | |
99 | ||
100 | return hp; | |
5cbc3073 DM |
101 | } |
102 | ||
43fdf274 | 103 | static void mdesc_bootmem_free(struct mdesc_handle *hp) |
5cbc3073 | 104 | { |
43fdf274 DM |
105 | unsigned int alloc_size, handle_size = hp->handle_size; |
106 | unsigned long start, end; | |
5cbc3073 | 107 | |
43fdf274 DM |
108 | BUG_ON(atomic_read(&hp->refcnt) != 0); |
109 | BUG_ON(!list_empty(&hp->list)); | |
5cbc3073 | 110 | |
43fdf274 DM |
111 | alloc_size = PAGE_ALIGN(handle_size); |
112 | ||
113 | start = (unsigned long) hp; | |
114 | end = start + alloc_size; | |
115 | ||
116 | while (start < end) { | |
117 | struct page *p; | |
118 | ||
119 | p = virt_to_page(start); | |
120 | ClearPageReserved(p); | |
121 | __free_page(p); | |
122 | start += PAGE_SIZE; | |
5cbc3073 | 123 | } |
5cbc3073 DM |
124 | } |
125 | ||
1256efd5 | 126 | static struct mdesc_mem_ops bootmem_mdesc_ops = { |
43fdf274 DM |
127 | .alloc = mdesc_bootmem_alloc, |
128 | .free = mdesc_bootmem_free, | |
129 | }; | |
130 | ||
131 | static struct mdesc_handle *mdesc_kmalloc(unsigned int mdesc_size) | |
5cbc3073 | 132 | { |
43fdf274 DM |
133 | unsigned int handle_size; |
134 | void *base; | |
5cbc3073 | 135 | |
43fdf274 DM |
136 | handle_size = (sizeof(struct mdesc_handle) - |
137 | sizeof(struct mdesc_hdr) + | |
138 | mdesc_size); | |
139 | ||
920c3ed7 | 140 | base = kmalloc(handle_size + 15, GFP_KERNEL | __GFP_NOFAIL); |
43fdf274 DM |
141 | if (base) { |
142 | struct mdesc_handle *hp; | |
143 | unsigned long addr; | |
144 | ||
145 | addr = (unsigned long)base; | |
146 | addr = (addr + 15UL) & ~15UL; | |
147 | hp = (struct mdesc_handle *) addr; | |
148 | ||
149 | mdesc_handle_init(hp, handle_size, base); | |
150 | return hp; | |
5cbc3073 | 151 | } |
43fdf274 DM |
152 | |
153 | return NULL; | |
5cbc3073 | 154 | } |
5cbc3073 | 155 | |
43fdf274 | 156 | static void mdesc_kfree(struct mdesc_handle *hp) |
5cbc3073 | 157 | { |
43fdf274 DM |
158 | BUG_ON(atomic_read(&hp->refcnt) != 0); |
159 | BUG_ON(!list_empty(&hp->list)); | |
160 | ||
161 | kfree(hp->self_base); | |
5cbc3073 | 162 | } |
5cbc3073 | 163 | |
43fdf274 DM |
164 | static struct mdesc_mem_ops kmalloc_mdesc_memops = { |
165 | .alloc = mdesc_kmalloc, | |
166 | .free = mdesc_kfree, | |
167 | }; | |
168 | ||
169 | static struct mdesc_handle *mdesc_alloc(unsigned int mdesc_size, | |
170 | struct mdesc_mem_ops *mops) | |
5cbc3073 | 171 | { |
43fdf274 | 172 | struct mdesc_handle *hp = mops->alloc(mdesc_size); |
5cbc3073 | 173 | |
43fdf274 DM |
174 | if (hp) |
175 | hp->mops = mops; | |
5cbc3073 | 176 | |
43fdf274 DM |
177 | return hp; |
178 | } | |
5cbc3073 | 179 | |
43fdf274 | 180 | static void mdesc_free(struct mdesc_handle *hp) |
5cbc3073 | 181 | { |
43fdf274 DM |
182 | hp->mops->free(hp); |
183 | } | |
5cbc3073 | 184 | |
43fdf274 DM |
185 | static struct mdesc_handle *cur_mdesc; |
186 | static LIST_HEAD(mdesc_zombie_list); | |
187 | static DEFINE_SPINLOCK(mdesc_lock); | |
5cbc3073 | 188 | |
43fdf274 DM |
189 | struct mdesc_handle *mdesc_grab(void) |
190 | { | |
191 | struct mdesc_handle *hp; | |
192 | unsigned long flags; | |
5cbc3073 | 193 | |
43fdf274 DM |
194 | spin_lock_irqsave(&mdesc_lock, flags); |
195 | hp = cur_mdesc; | |
196 | if (hp) | |
197 | atomic_inc(&hp->refcnt); | |
198 | spin_unlock_irqrestore(&mdesc_lock, flags); | |
5cbc3073 | 199 | |
43fdf274 | 200 | return hp; |
5cbc3073 | 201 | } |
43fdf274 | 202 | EXPORT_SYMBOL(mdesc_grab); |
5cbc3073 | 203 | |
43fdf274 | 204 | void mdesc_release(struct mdesc_handle *hp) |
5cbc3073 | 205 | { |
43fdf274 | 206 | unsigned long flags; |
5cbc3073 | 207 | |
43fdf274 DM |
208 | spin_lock_irqsave(&mdesc_lock, flags); |
209 | if (atomic_dec_and_test(&hp->refcnt)) { | |
210 | list_del_init(&hp->list); | |
211 | hp->mops->free(hp); | |
5cbc3073 | 212 | } |
43fdf274 | 213 | spin_unlock_irqrestore(&mdesc_lock, flags); |
5cbc3073 | 214 | } |
43fdf274 | 215 | EXPORT_SYMBOL(mdesc_release); |
5cbc3073 | 216 | |
920c3ed7 DM |
217 | static DEFINE_MUTEX(mdesc_mutex); |
218 | static struct mdesc_notifier_client *client_list; | |
219 | ||
220 | void mdesc_register_notifier(struct mdesc_notifier_client *client) | |
221 | { | |
222 | u64 node; | |
223 | ||
224 | mutex_lock(&mdesc_mutex); | |
225 | client->next = client_list; | |
226 | client_list = client; | |
227 | ||
228 | mdesc_for_each_node_by_name(cur_mdesc, node, client->node_name) | |
229 | client->add(cur_mdesc, node); | |
230 | ||
231 | mutex_unlock(&mdesc_mutex); | |
232 | } | |
233 | ||
91ba3c21 DM |
234 | static const u64 *parent_cfg_handle(struct mdesc_handle *hp, u64 node) |
235 | { | |
236 | const u64 *id; | |
237 | u64 a; | |
238 | ||
239 | id = NULL; | |
240 | mdesc_for_each_arc(a, hp, node, MDESC_ARC_TYPE_BACK) { | |
241 | u64 target; | |
242 | ||
243 | target = mdesc_arc_target(hp, a); | |
244 | id = mdesc_get_property(hp, target, | |
245 | "cfg-handle", NULL); | |
246 | if (id) | |
247 | break; | |
248 | } | |
249 | ||
250 | return id; | |
251 | } | |
252 | ||
920c3ed7 DM |
253 | /* Run 'func' on nodes which are in A but not in B. */ |
254 | static void invoke_on_missing(const char *name, | |
255 | struct mdesc_handle *a, | |
256 | struct mdesc_handle *b, | |
257 | void (*func)(struct mdesc_handle *, u64)) | |
258 | { | |
259 | u64 node; | |
260 | ||
261 | mdesc_for_each_node_by_name(a, node, name) { | |
91ba3c21 DM |
262 | int found = 0, is_vdc_port = 0; |
263 | const char *name_prop; | |
264 | const u64 *id; | |
920c3ed7 DM |
265 | u64 fnode; |
266 | ||
91ba3c21 DM |
267 | name_prop = mdesc_get_property(a, node, "name", NULL); |
268 | if (name_prop && !strcmp(name_prop, "vdc-port")) { | |
269 | is_vdc_port = 1; | |
270 | id = parent_cfg_handle(a, node); | |
271 | } else | |
272 | id = mdesc_get_property(a, node, "id", NULL); | |
273 | ||
274 | if (!id) { | |
275 | printk(KERN_ERR "MD: Cannot find ID for %s node.\n", | |
276 | (name_prop ? name_prop : name)); | |
277 | continue; | |
278 | } | |
279 | ||
920c3ed7 | 280 | mdesc_for_each_node_by_name(b, fnode, name) { |
91ba3c21 DM |
281 | const u64 *fid; |
282 | ||
283 | if (is_vdc_port) { | |
284 | name_prop = mdesc_get_property(b, fnode, | |
285 | "name", NULL); | |
286 | if (!name_prop || | |
287 | strcmp(name_prop, "vdc-port")) | |
288 | continue; | |
289 | fid = parent_cfg_handle(b, fnode); | |
290 | if (!fid) { | |
291 | printk(KERN_ERR "MD: Cannot find ID " | |
292 | "for vdc-port node.\n"); | |
293 | continue; | |
294 | } | |
295 | } else | |
296 | fid = mdesc_get_property(b, fnode, | |
297 | "id", NULL); | |
920c3ed7 DM |
298 | |
299 | if (*id == *fid) { | |
300 | found = 1; | |
301 | break; | |
302 | } | |
303 | } | |
304 | if (!found) | |
305 | func(a, node); | |
306 | } | |
307 | } | |
308 | ||
309 | static void notify_one(struct mdesc_notifier_client *p, | |
310 | struct mdesc_handle *old_hp, | |
311 | struct mdesc_handle *new_hp) | |
312 | { | |
313 | invoke_on_missing(p->node_name, old_hp, new_hp, p->remove); | |
314 | invoke_on_missing(p->node_name, new_hp, old_hp, p->add); | |
315 | } | |
316 | ||
317 | static void mdesc_notify_clients(struct mdesc_handle *old_hp, | |
318 | struct mdesc_handle *new_hp) | |
319 | { | |
320 | struct mdesc_notifier_client *p = client_list; | |
321 | ||
322 | while (p) { | |
323 | notify_one(p, old_hp, new_hp); | |
324 | p = p->next; | |
325 | } | |
326 | } | |
327 | ||
778feeb4 | 328 | void mdesc_update(void) |
5cbc3073 | 329 | { |
43fdf274 DM |
330 | unsigned long len, real_len, status; |
331 | struct mdesc_handle *hp, *orig_hp; | |
332 | unsigned long flags; | |
333 | ||
920c3ed7 DM |
334 | mutex_lock(&mdesc_mutex); |
335 | ||
43fdf274 DM |
336 | (void) sun4v_mach_desc(0UL, 0UL, &len); |
337 | ||
338 | hp = mdesc_alloc(len, &kmalloc_mdesc_memops); | |
339 | if (!hp) { | |
340 | printk(KERN_ERR "MD: mdesc alloc fails\n"); | |
920c3ed7 | 341 | goto out; |
43fdf274 DM |
342 | } |
343 | ||
344 | status = sun4v_mach_desc(__pa(&hp->mdesc), len, &real_len); | |
345 | if (status != HV_EOK || real_len > len) { | |
346 | printk(KERN_ERR "MD: mdesc reread fails with %lu\n", | |
347 | status); | |
348 | atomic_dec(&hp->refcnt); | |
349 | mdesc_free(hp); | |
920c3ed7 | 350 | goto out; |
43fdf274 | 351 | } |
5cbc3073 | 352 | |
43fdf274 DM |
353 | spin_lock_irqsave(&mdesc_lock, flags); |
354 | orig_hp = cur_mdesc; | |
355 | cur_mdesc = hp; | |
920c3ed7 | 356 | spin_unlock_irqrestore(&mdesc_lock, flags); |
5cbc3073 | 357 | |
920c3ed7 DM |
358 | mdesc_notify_clients(orig_hp, hp); |
359 | ||
360 | spin_lock_irqsave(&mdesc_lock, flags); | |
43fdf274 DM |
361 | if (atomic_dec_and_test(&orig_hp->refcnt)) |
362 | mdesc_free(orig_hp); | |
363 | else | |
364 | list_add(&orig_hp->list, &mdesc_zombie_list); | |
365 | spin_unlock_irqrestore(&mdesc_lock, flags); | |
920c3ed7 DM |
366 | |
367 | out: | |
368 | mutex_unlock(&mdesc_mutex); | |
5cbc3073 DM |
369 | } |
370 | ||
43fdf274 | 371 | static struct mdesc_elem *node_block(struct mdesc_hdr *mdesc) |
5cbc3073 DM |
372 | { |
373 | return (struct mdesc_elem *) (mdesc + 1); | |
374 | } | |
375 | ||
43fdf274 | 376 | static void *name_block(struct mdesc_hdr *mdesc) |
5cbc3073 DM |
377 | { |
378 | return ((void *) node_block(mdesc)) + mdesc->node_sz; | |
379 | } | |
380 | ||
43fdf274 | 381 | static void *data_block(struct mdesc_hdr *mdesc) |
5cbc3073 DM |
382 | { |
383 | return ((void *) name_block(mdesc)) + mdesc->name_sz; | |
384 | } | |
385 | ||
43fdf274 DM |
386 | u64 mdesc_node_by_name(struct mdesc_handle *hp, |
387 | u64 from_node, const char *name) | |
5cbc3073 | 388 | { |
43fdf274 DM |
389 | struct mdesc_elem *ep = node_block(&hp->mdesc); |
390 | const char *names = name_block(&hp->mdesc); | |
391 | u64 last_node = hp->mdesc.node_sz / 16; | |
392 | u64 ret; | |
393 | ||
778feeb4 DM |
394 | if (from_node == MDESC_NODE_NULL) { |
395 | ret = from_node = 0; | |
396 | } else if (from_node >= last_node) { | |
43fdf274 | 397 | return MDESC_NODE_NULL; |
778feeb4 DM |
398 | } else { |
399 | ret = ep[from_node].d.val; | |
400 | } | |
43fdf274 | 401 | |
43fdf274 DM |
402 | while (ret < last_node) { |
403 | if (ep[ret].tag != MD_NODE) | |
404 | return MDESC_NODE_NULL; | |
405 | if (!strcmp(names + ep[ret].name_offset, name)) | |
406 | break; | |
407 | ret = ep[ret].d.val; | |
408 | } | |
409 | if (ret >= last_node) | |
410 | ret = MDESC_NODE_NULL; | |
411 | return ret; | |
412 | } | |
413 | EXPORT_SYMBOL(mdesc_node_by_name); | |
5cbc3073 | 414 | |
43fdf274 DM |
415 | const void *mdesc_get_property(struct mdesc_handle *hp, u64 node, |
416 | const char *name, int *lenp) | |
417 | { | |
418 | const char *names = name_block(&hp->mdesc); | |
419 | u64 last_node = hp->mdesc.node_sz / 16; | |
420 | void *data = data_block(&hp->mdesc); | |
421 | struct mdesc_elem *ep; | |
5cbc3073 | 422 | |
43fdf274 DM |
423 | if (node == MDESC_NODE_NULL || node >= last_node) |
424 | return NULL; | |
5cbc3073 | 425 | |
43fdf274 DM |
426 | ep = node_block(&hp->mdesc) + node; |
427 | ep++; | |
428 | for (; ep->tag != MD_NODE_END; ep++) { | |
429 | void *val = NULL; | |
430 | int len = 0; | |
431 | ||
432 | switch (ep->tag) { | |
433 | case MD_PROP_VAL: | |
434 | val = &ep->d.val; | |
435 | len = 8; | |
5cbc3073 DM |
436 | break; |
437 | ||
43fdf274 DM |
438 | case MD_PROP_STR: |
439 | case MD_PROP_DATA: | |
440 | val = data + ep->d.data.data_offset; | |
441 | len = ep->d.data.data_len; | |
442 | break; | |
5cbc3073 | 443 | |
43fdf274 | 444 | default: |
5cbc3073 DM |
445 | break; |
446 | } | |
43fdf274 DM |
447 | if (!val) |
448 | continue; | |
5cbc3073 | 449 | |
43fdf274 DM |
450 | if (!strcmp(names + ep->name_offset, name)) { |
451 | if (lenp) | |
452 | *lenp = len; | |
453 | return val; | |
454 | } | |
5cbc3073 DM |
455 | } |
456 | ||
43fdf274 DM |
457 | return NULL; |
458 | } | |
459 | EXPORT_SYMBOL(mdesc_get_property); | |
5cbc3073 | 460 | |
43fdf274 DM |
461 | u64 mdesc_next_arc(struct mdesc_handle *hp, u64 from, const char *arc_type) |
462 | { | |
463 | struct mdesc_elem *ep, *base = node_block(&hp->mdesc); | |
464 | const char *names = name_block(&hp->mdesc); | |
465 | u64 last_node = hp->mdesc.node_sz / 16; | |
5cbc3073 | 466 | |
43fdf274 DM |
467 | if (from == MDESC_NODE_NULL || from >= last_node) |
468 | return MDESC_NODE_NULL; | |
5cbc3073 | 469 | |
43fdf274 DM |
470 | ep = base + from; |
471 | ||
472 | ep++; | |
473 | for (; ep->tag != MD_NODE_END; ep++) { | |
474 | if (ep->tag != MD_PROP_ARC) | |
475 | continue; | |
476 | ||
477 | if (strcmp(names + ep->name_offset, arc_type)) | |
478 | continue; | |
479 | ||
480 | return ep - base; | |
5cbc3073 | 481 | } |
43fdf274 DM |
482 | |
483 | return MDESC_NODE_NULL; | |
5cbc3073 | 484 | } |
43fdf274 | 485 | EXPORT_SYMBOL(mdesc_next_arc); |
5cbc3073 | 486 | |
43fdf274 | 487 | u64 mdesc_arc_target(struct mdesc_handle *hp, u64 arc) |
5cbc3073 | 488 | { |
43fdf274 DM |
489 | struct mdesc_elem *ep, *base = node_block(&hp->mdesc); |
490 | ||
491 | ep = base + arc; | |
492 | ||
493 | return ep->d.val; | |
5cbc3073 | 494 | } |
43fdf274 DM |
495 | EXPORT_SYMBOL(mdesc_arc_target); |
496 | ||
497 | const char *mdesc_node_name(struct mdesc_handle *hp, u64 node) | |
498 | { | |
499 | struct mdesc_elem *ep, *base = node_block(&hp->mdesc); | |
500 | const char *names = name_block(&hp->mdesc); | |
501 | u64 last_node = hp->mdesc.node_sz / 16; | |
502 | ||
503 | if (node == MDESC_NODE_NULL || node >= last_node) | |
504 | return NULL; | |
505 | ||
506 | ep = base + node; | |
507 | if (ep->tag != MD_NODE) | |
508 | return NULL; | |
509 | ||
510 | return names + ep->name_offset; | |
511 | } | |
512 | EXPORT_SYMBOL(mdesc_node_name); | |
5cbc3073 DM |
513 | |
514 | static void __init report_platform_properties(void) | |
515 | { | |
43fdf274 DM |
516 | struct mdesc_handle *hp = mdesc_grab(); |
517 | u64 pn = mdesc_node_by_name(hp, MDESC_NODE_NULL, "platform"); | |
5cbc3073 DM |
518 | const char *s; |
519 | const u64 *v; | |
520 | ||
43fdf274 | 521 | if (pn == MDESC_NODE_NULL) { |
5cbc3073 DM |
522 | prom_printf("No platform node in machine-description.\n"); |
523 | prom_halt(); | |
524 | } | |
525 | ||
43fdf274 | 526 | s = mdesc_get_property(hp, pn, "banner-name", NULL); |
5cbc3073 | 527 | printk("PLATFORM: banner-name [%s]\n", s); |
43fdf274 | 528 | s = mdesc_get_property(hp, pn, "name", NULL); |
5cbc3073 DM |
529 | printk("PLATFORM: name [%s]\n", s); |
530 | ||
43fdf274 | 531 | v = mdesc_get_property(hp, pn, "hostid", NULL); |
5cbc3073 DM |
532 | if (v) |
533 | printk("PLATFORM: hostid [%08lx]\n", *v); | |
43fdf274 | 534 | v = mdesc_get_property(hp, pn, "serial#", NULL); |
5cbc3073 DM |
535 | if (v) |
536 | printk("PLATFORM: serial# [%08lx]\n", *v); | |
43fdf274 | 537 | v = mdesc_get_property(hp, pn, "stick-frequency", NULL); |
5cbc3073 | 538 | printk("PLATFORM: stick-frequency [%08lx]\n", *v); |
43fdf274 | 539 | v = mdesc_get_property(hp, pn, "mac-address", NULL); |
5cbc3073 DM |
540 | if (v) |
541 | printk("PLATFORM: mac-address [%lx]\n", *v); | |
43fdf274 | 542 | v = mdesc_get_property(hp, pn, "watchdog-resolution", NULL); |
5cbc3073 DM |
543 | if (v) |
544 | printk("PLATFORM: watchdog-resolution [%lu ms]\n", *v); | |
43fdf274 | 545 | v = mdesc_get_property(hp, pn, "watchdog-max-timeout", NULL); |
5cbc3073 DM |
546 | if (v) |
547 | printk("PLATFORM: watchdog-max-timeout [%lu ms]\n", *v); | |
43fdf274 | 548 | v = mdesc_get_property(hp, pn, "max-cpus", NULL); |
5cbc3073 DM |
549 | if (v) |
550 | printk("PLATFORM: max-cpus [%lu]\n", *v); | |
43fdf274 | 551 | |
4f0234f4 DM |
552 | #ifdef CONFIG_SMP |
553 | { | |
554 | int max_cpu, i; | |
555 | ||
556 | if (v) { | |
557 | max_cpu = *v; | |
558 | if (max_cpu > NR_CPUS) | |
559 | max_cpu = NR_CPUS; | |
560 | } else { | |
561 | max_cpu = NR_CPUS; | |
562 | } | |
563 | for (i = 0; i < max_cpu; i++) | |
564 | cpu_set(i, cpu_possible_map); | |
565 | } | |
566 | #endif | |
567 | ||
43fdf274 | 568 | mdesc_release(hp); |
5cbc3073 DM |
569 | } |
570 | ||
571 | static int inline find_in_proplist(const char *list, const char *match, int len) | |
572 | { | |
573 | while (len > 0) { | |
574 | int l; | |
575 | ||
576 | if (!strcmp(list, match)) | |
577 | return 1; | |
578 | l = strlen(list) + 1; | |
579 | list += l; | |
580 | len -= l; | |
581 | } | |
582 | return 0; | |
583 | } | |
584 | ||
4f0234f4 DM |
585 | static void __devinit fill_in_one_cache(cpuinfo_sparc *c, |
586 | struct mdesc_handle *hp, | |
587 | u64 mp) | |
5cbc3073 | 588 | { |
43fdf274 DM |
589 | const u64 *level = mdesc_get_property(hp, mp, "level", NULL); |
590 | const u64 *size = mdesc_get_property(hp, mp, "size", NULL); | |
591 | const u64 *line_size = mdesc_get_property(hp, mp, "line-size", NULL); | |
5cbc3073 DM |
592 | const char *type; |
593 | int type_len; | |
594 | ||
43fdf274 | 595 | type = mdesc_get_property(hp, mp, "type", &type_len); |
5cbc3073 DM |
596 | |
597 | switch (*level) { | |
598 | case 1: | |
599 | if (find_in_proplist(type, "instn", type_len)) { | |
600 | c->icache_size = *size; | |
601 | c->icache_line_size = *line_size; | |
602 | } else if (find_in_proplist(type, "data", type_len)) { | |
603 | c->dcache_size = *size; | |
604 | c->dcache_line_size = *line_size; | |
605 | } | |
606 | break; | |
607 | ||
608 | case 2: | |
609 | c->ecache_size = *size; | |
610 | c->ecache_line_size = *line_size; | |
611 | break; | |
612 | ||
613 | default: | |
614 | break; | |
615 | } | |
616 | ||
617 | if (*level == 1) { | |
43fdf274 | 618 | u64 a; |
5cbc3073 | 619 | |
43fdf274 DM |
620 | mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) { |
621 | u64 target = mdesc_arc_target(hp, a); | |
622 | const char *name = mdesc_node_name(hp, target); | |
5cbc3073 | 623 | |
43fdf274 DM |
624 | if (!strcmp(name, "cache")) |
625 | fill_in_one_cache(c, hp, target); | |
5cbc3073 DM |
626 | } |
627 | } | |
628 | } | |
629 | ||
4f0234f4 DM |
630 | static void __devinit mark_core_ids(struct mdesc_handle *hp, u64 mp, |
631 | int core_id) | |
5cbc3073 | 632 | { |
43fdf274 | 633 | u64 a; |
5cbc3073 | 634 | |
43fdf274 DM |
635 | mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) { |
636 | u64 t = mdesc_arc_target(hp, a); | |
637 | const char *name; | |
5cbc3073 DM |
638 | const u64 *id; |
639 | ||
43fdf274 DM |
640 | name = mdesc_node_name(hp, t); |
641 | if (!strcmp(name, "cpu")) { | |
642 | id = mdesc_get_property(hp, t, "id", NULL); | |
5cbc3073 DM |
643 | if (*id < NR_CPUS) |
644 | cpu_data(*id).core_id = core_id; | |
645 | } else { | |
43fdf274 | 646 | u64 j; |
5cbc3073 | 647 | |
43fdf274 DM |
648 | mdesc_for_each_arc(j, hp, t, MDESC_ARC_TYPE_BACK) { |
649 | u64 n = mdesc_arc_target(hp, j); | |
650 | const char *n_name; | |
5cbc3073 | 651 | |
43fdf274 DM |
652 | n_name = mdesc_node_name(hp, n); |
653 | if (strcmp(n_name, "cpu")) | |
5cbc3073 DM |
654 | continue; |
655 | ||
43fdf274 | 656 | id = mdesc_get_property(hp, n, "id", NULL); |
5cbc3073 DM |
657 | if (*id < NR_CPUS) |
658 | cpu_data(*id).core_id = core_id; | |
659 | } | |
660 | } | |
661 | } | |
662 | } | |
663 | ||
4f0234f4 | 664 | static void __devinit set_core_ids(struct mdesc_handle *hp) |
5cbc3073 | 665 | { |
5cbc3073 | 666 | int idx; |
43fdf274 | 667 | u64 mp; |
5cbc3073 DM |
668 | |
669 | idx = 1; | |
43fdf274 DM |
670 | mdesc_for_each_node_by_name(hp, mp, "cache") { |
671 | const u64 *level; | |
5cbc3073 DM |
672 | const char *type; |
673 | int len; | |
674 | ||
43fdf274 | 675 | level = mdesc_get_property(hp, mp, "level", NULL); |
5cbc3073 DM |
676 | if (*level != 1) |
677 | continue; | |
678 | ||
43fdf274 | 679 | type = mdesc_get_property(hp, mp, "type", &len); |
5cbc3073 DM |
680 | if (!find_in_proplist(type, "instn", len)) |
681 | continue; | |
682 | ||
43fdf274 | 683 | mark_core_ids(hp, mp, idx); |
5cbc3073 DM |
684 | |
685 | idx++; | |
686 | } | |
687 | } | |
688 | ||
4f0234f4 DM |
689 | static void __devinit mark_proc_ids(struct mdesc_handle *hp, u64 mp, |
690 | int proc_id) | |
f78eae2e | 691 | { |
43fdf274 | 692 | u64 a; |
f78eae2e | 693 | |
43fdf274 DM |
694 | mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) { |
695 | u64 t = mdesc_arc_target(hp, a); | |
696 | const char *name; | |
f78eae2e DM |
697 | const u64 *id; |
698 | ||
43fdf274 DM |
699 | name = mdesc_node_name(hp, t); |
700 | if (strcmp(name, "cpu")) | |
f78eae2e DM |
701 | continue; |
702 | ||
43fdf274 | 703 | id = mdesc_get_property(hp, t, "id", NULL); |
f78eae2e DM |
704 | if (*id < NR_CPUS) |
705 | cpu_data(*id).proc_id = proc_id; | |
706 | } | |
707 | } | |
708 | ||
4f0234f4 DM |
709 | static void __devinit __set_proc_ids(struct mdesc_handle *hp, |
710 | const char *exec_unit_name) | |
f78eae2e | 711 | { |
f78eae2e | 712 | int idx; |
43fdf274 | 713 | u64 mp; |
f78eae2e DM |
714 | |
715 | idx = 0; | |
43fdf274 | 716 | mdesc_for_each_node_by_name(hp, mp, exec_unit_name) { |
f78eae2e DM |
717 | const char *type; |
718 | int len; | |
719 | ||
43fdf274 | 720 | type = mdesc_get_property(hp, mp, "type", &len); |
f78eae2e DM |
721 | if (!find_in_proplist(type, "int", len) && |
722 | !find_in_proplist(type, "integer", len)) | |
723 | continue; | |
724 | ||
43fdf274 | 725 | mark_proc_ids(hp, mp, idx); |
f78eae2e DM |
726 | |
727 | idx++; | |
728 | } | |
729 | } | |
730 | ||
4f0234f4 | 731 | static void __devinit set_proc_ids(struct mdesc_handle *hp) |
f78eae2e | 732 | { |
43fdf274 DM |
733 | __set_proc_ids(hp, "exec_unit"); |
734 | __set_proc_ids(hp, "exec-unit"); | |
f78eae2e DM |
735 | } |
736 | ||
4f0234f4 DM |
737 | static void __devinit get_one_mondo_bits(const u64 *p, unsigned int *mask, |
738 | unsigned char def) | |
5cbc3073 DM |
739 | { |
740 | u64 val; | |
741 | ||
742 | if (!p) | |
743 | goto use_default; | |
744 | val = *p; | |
745 | ||
746 | if (!val || val >= 64) | |
747 | goto use_default; | |
748 | ||
749 | *mask = ((1U << val) * 64U) - 1U; | |
750 | return; | |
751 | ||
752 | use_default: | |
753 | *mask = ((1U << def) * 64U) - 1U; | |
754 | } | |
755 | ||
4f0234f4 DM |
756 | static void __devinit get_mondo_data(struct mdesc_handle *hp, u64 mp, |
757 | struct trap_per_cpu *tb) | |
5cbc3073 DM |
758 | { |
759 | const u64 *val; | |
760 | ||
43fdf274 | 761 | val = mdesc_get_property(hp, mp, "q-cpu-mondo-#bits", NULL); |
5cbc3073 DM |
762 | get_one_mondo_bits(val, &tb->cpu_mondo_qmask, 7); |
763 | ||
43fdf274 | 764 | val = mdesc_get_property(hp, mp, "q-dev-mondo-#bits", NULL); |
5cbc3073 DM |
765 | get_one_mondo_bits(val, &tb->dev_mondo_qmask, 7); |
766 | ||
43fdf274 | 767 | val = mdesc_get_property(hp, mp, "q-resumable-#bits", NULL); |
5cbc3073 DM |
768 | get_one_mondo_bits(val, &tb->resum_qmask, 6); |
769 | ||
43fdf274 | 770 | val = mdesc_get_property(hp, mp, "q-nonresumable-#bits", NULL); |
5cbc3073 DM |
771 | get_one_mondo_bits(val, &tb->nonresum_qmask, 2); |
772 | } | |
773 | ||
4f0234f4 | 774 | void __devinit mdesc_fill_in_cpu_data(cpumask_t mask) |
5cbc3073 | 775 | { |
43fdf274 DM |
776 | struct mdesc_handle *hp = mdesc_grab(); |
777 | u64 mp; | |
5cbc3073 DM |
778 | |
779 | ncpus_probed = 0; | |
43fdf274 DM |
780 | mdesc_for_each_node_by_name(hp, mp, "cpu") { |
781 | const u64 *id = mdesc_get_property(hp, mp, "id", NULL); | |
782 | const u64 *cfreq = mdesc_get_property(hp, mp, "clock-frequency", NULL); | |
5cbc3073 DM |
783 | struct trap_per_cpu *tb; |
784 | cpuinfo_sparc *c; | |
5cbc3073 | 785 | int cpuid; |
43fdf274 | 786 | u64 a; |
5cbc3073 DM |
787 | |
788 | ncpus_probed++; | |
789 | ||
790 | cpuid = *id; | |
791 | ||
792 | #ifdef CONFIG_SMP | |
793 | if (cpuid >= NR_CPUS) | |
794 | continue; | |
4f0234f4 DM |
795 | if (!cpu_isset(cpuid, mask)) |
796 | continue; | |
5cbc3073 DM |
797 | #else |
798 | /* On uniprocessor we only want the values for the | |
799 | * real physical cpu the kernel booted onto, however | |
800 | * cpu_data() only has one entry at index 0. | |
801 | */ | |
802 | if (cpuid != real_hard_smp_processor_id()) | |
803 | continue; | |
804 | cpuid = 0; | |
805 | #endif | |
806 | ||
807 | c = &cpu_data(cpuid); | |
808 | c->clock_tick = *cfreq; | |
809 | ||
810 | tb = &trap_block[cpuid]; | |
43fdf274 | 811 | get_mondo_data(hp, mp, tb); |
5cbc3073 | 812 | |
43fdf274 DM |
813 | mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) { |
814 | u64 j, t = mdesc_arc_target(hp, a); | |
815 | const char *t_name; | |
5cbc3073 | 816 | |
43fdf274 DM |
817 | t_name = mdesc_node_name(hp, t); |
818 | if (!strcmp(t_name, "cache")) { | |
819 | fill_in_one_cache(c, hp, t); | |
5cbc3073 DM |
820 | continue; |
821 | } | |
822 | ||
43fdf274 DM |
823 | mdesc_for_each_arc(j, hp, t, MDESC_ARC_TYPE_FWD) { |
824 | u64 n = mdesc_arc_target(hp, j); | |
825 | const char *n_name; | |
5cbc3073 | 826 | |
43fdf274 DM |
827 | n_name = mdesc_node_name(hp, n); |
828 | if (!strcmp(n_name, "cache")) | |
829 | fill_in_one_cache(c, hp, n); | |
5cbc3073 DM |
830 | } |
831 | } | |
832 | ||
833 | #ifdef CONFIG_SMP | |
834 | cpu_set(cpuid, cpu_present_map); | |
5cbc3073 DM |
835 | #endif |
836 | ||
837 | c->core_id = 0; | |
f78eae2e | 838 | c->proc_id = -1; |
5cbc3073 DM |
839 | } |
840 | ||
a2f9f6bb DM |
841 | #ifdef CONFIG_SMP |
842 | sparc64_multi_core = 1; | |
843 | #endif | |
844 | ||
43fdf274 DM |
845 | set_core_ids(hp); |
846 | set_proc_ids(hp); | |
5cbc3073 DM |
847 | |
848 | smp_fill_in_sib_core_maps(); | |
43fdf274 DM |
849 | |
850 | mdesc_release(hp); | |
5cbc3073 DM |
851 | } |
852 | ||
853 | void __init sun4v_mdesc_init(void) | |
854 | { | |
43fdf274 | 855 | struct mdesc_handle *hp; |
5cbc3073 | 856 | unsigned long len, real_len, status; |
4f0234f4 | 857 | cpumask_t mask; |
5cbc3073 DM |
858 | |
859 | (void) sun4v_mach_desc(0UL, 0UL, &len); | |
860 | ||
861 | printk("MDESC: Size is %lu bytes.\n", len); | |
862 | ||
1256efd5 | 863 | hp = mdesc_alloc(len, &bootmem_mdesc_ops); |
43fdf274 DM |
864 | if (hp == NULL) { |
865 | prom_printf("MDESC: alloc of %lu bytes failed.\n", len); | |
866 | prom_halt(); | |
867 | } | |
5cbc3073 | 868 | |
43fdf274 | 869 | status = sun4v_mach_desc(__pa(&hp->mdesc), len, &real_len); |
5cbc3073 DM |
870 | if (status != HV_EOK || real_len > len) { |
871 | prom_printf("sun4v_mach_desc fails, err(%lu), " | |
872 | "len(%lu), real_len(%lu)\n", | |
873 | status, len, real_len); | |
43fdf274 | 874 | mdesc_free(hp); |
5cbc3073 DM |
875 | prom_halt(); |
876 | } | |
877 | ||
43fdf274 | 878 | cur_mdesc = hp; |
5cbc3073 DM |
879 | |
880 | report_platform_properties(); | |
4f0234f4 DM |
881 | |
882 | cpus_setall(mask); | |
883 | mdesc_fill_in_cpu_data(mask); | |
5cbc3073 | 884 | } |