Commit | Line | Data |
---|---|---|
5cbc3073 DM |
1 | /* mdesc.c: Sun4V machine description handling. |
2 | * | |
4a283339 | 3 | * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net> |
5cbc3073 DM |
4 | */ |
5 | #include <linux/kernel.h> | |
6 | #include <linux/types.h> | |
95f72d1e | 7 | #include <linux/memblock.h> |
5cbc3073 | 8 | #include <linux/log2.h> |
43fdf274 DM |
9 | #include <linux/list.h> |
10 | #include <linux/slab.h> | |
8f3fff20 | 11 | #include <linux/mm.h> |
0fdb7f96 | 12 | #include <linux/miscdevice.h> |
adfe67dd | 13 | #include <linux/bootmem.h> |
5cbc3073 | 14 | |
6e6ab2e2 | 15 | #include <asm/cpudata.h> |
5cbc3073 DM |
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 */ | |
43fdf274 | 38 | } __attribute__((aligned(16))); |
5cbc3073 DM |
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 | ||
43fdf274 DM |
62 | struct mdesc_mem_ops { |
63 | struct mdesc_handle *(*alloc)(unsigned int mdesc_size); | |
64 | void (*free)(struct mdesc_handle *handle); | |
65 | }; | |
5cbc3073 | 66 | |
43fdf274 DM |
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 | }; | |
5cbc3073 | 75 | |
43fdf274 DM |
76 | static void mdesc_handle_init(struct mdesc_handle *hp, |
77 | unsigned int handle_size, | |
78 | void *base) | |
5cbc3073 | 79 | { |
43fdf274 DM |
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; | |
5cbc3073 DM |
87 | } |
88 | ||
95f72d1e | 89 | static struct mdesc_handle * __init mdesc_memblock_alloc(unsigned int mdesc_size) |
5cbc3073 | 90 | { |
43fdf274 | 91 | unsigned int handle_size, alloc_size; |
4a283339 DM |
92 | struct mdesc_handle *hp; |
93 | unsigned long paddr; | |
5cbc3073 | 94 | |
43fdf274 DM |
95 | handle_size = (sizeof(struct mdesc_handle) - |
96 | sizeof(struct mdesc_hdr) + | |
97 | mdesc_size); | |
98 | alloc_size = PAGE_ALIGN(handle_size); | |
5cbc3073 | 99 | |
95f72d1e | 100 | paddr = memblock_alloc(alloc_size, PAGE_SIZE); |
43fdf274 | 101 | |
4a283339 DM |
102 | hp = NULL; |
103 | if (paddr) { | |
104 | hp = __va(paddr); | |
105 | mdesc_handle_init(hp, handle_size, hp); | |
106 | } | |
43fdf274 | 107 | return hp; |
5cbc3073 DM |
108 | } |
109 | ||
95f72d1e | 110 | static void mdesc_memblock_free(struct mdesc_handle *hp) |
5cbc3073 | 111 | { |
adfe67dd DM |
112 | unsigned int alloc_size; |
113 | unsigned long start; | |
5cbc3073 | 114 | |
43fdf274 DM |
115 | BUG_ON(atomic_read(&hp->refcnt) != 0); |
116 | BUG_ON(!list_empty(&hp->list)); | |
5cbc3073 | 117 | |
adfe67dd DM |
118 | alloc_size = PAGE_ALIGN(hp->handle_size); |
119 | start = __pa(hp); | |
120 | free_bootmem_late(start, alloc_size); | |
5cbc3073 DM |
121 | } |
122 | ||
95f72d1e YL |
123 | static struct mdesc_mem_ops memblock_mdesc_ops = { |
124 | .alloc = mdesc_memblock_alloc, | |
125 | .free = mdesc_memblock_free, | |
43fdf274 DM |
126 | }; |
127 | ||
128 | static struct mdesc_handle *mdesc_kmalloc(unsigned int mdesc_size) | |
5cbc3073 | 129 | { |
43fdf274 DM |
130 | unsigned int handle_size; |
131 | void *base; | |
5cbc3073 | 132 | |
43fdf274 DM |
133 | handle_size = (sizeof(struct mdesc_handle) - |
134 | sizeof(struct mdesc_hdr) + | |
135 | mdesc_size); | |
136 | ||
920c3ed7 | 137 | base = kmalloc(handle_size + 15, GFP_KERNEL | __GFP_NOFAIL); |
43fdf274 DM |
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; | |
5cbc3073 | 148 | } |
43fdf274 DM |
149 | |
150 | return NULL; | |
5cbc3073 | 151 | } |
5cbc3073 | 152 | |
43fdf274 | 153 | static void mdesc_kfree(struct mdesc_handle *hp) |
5cbc3073 | 154 | { |
43fdf274 DM |
155 | BUG_ON(atomic_read(&hp->refcnt) != 0); |
156 | BUG_ON(!list_empty(&hp->list)); | |
157 | ||
158 | kfree(hp->self_base); | |
5cbc3073 | 159 | } |
5cbc3073 | 160 | |
43fdf274 DM |
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) | |
5cbc3073 | 168 | { |
43fdf274 | 169 | struct mdesc_handle *hp = mops->alloc(mdesc_size); |
5cbc3073 | 170 | |
43fdf274 DM |
171 | if (hp) |
172 | hp->mops = mops; | |
5cbc3073 | 173 | |
43fdf274 DM |
174 | return hp; |
175 | } | |
5cbc3073 | 176 | |
43fdf274 | 177 | static void mdesc_free(struct mdesc_handle *hp) |
5cbc3073 | 178 | { |
43fdf274 DM |
179 | hp->mops->free(hp); |
180 | } | |
5cbc3073 | 181 | |
43fdf274 DM |
182 | static struct mdesc_handle *cur_mdesc; |
183 | static LIST_HEAD(mdesc_zombie_list); | |
184 | static DEFINE_SPINLOCK(mdesc_lock); | |
5cbc3073 | 185 | |
43fdf274 DM |
186 | struct mdesc_handle *mdesc_grab(void) |
187 | { | |
188 | struct mdesc_handle *hp; | |
189 | unsigned long flags; | |
5cbc3073 | 190 | |
43fdf274 DM |
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); | |
5cbc3073 | 196 | |
43fdf274 | 197 | return hp; |
5cbc3073 | 198 | } |
43fdf274 | 199 | EXPORT_SYMBOL(mdesc_grab); |
5cbc3073 | 200 | |
43fdf274 | 201 | void mdesc_release(struct mdesc_handle *hp) |
5cbc3073 | 202 | { |
43fdf274 | 203 | unsigned long flags; |
5cbc3073 | 204 | |
43fdf274 DM |
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); | |
5cbc3073 | 209 | } |
43fdf274 | 210 | spin_unlock_irqrestore(&mdesc_lock, flags); |
5cbc3073 | 211 | } |
43fdf274 | 212 | EXPORT_SYMBOL(mdesc_release); |
5cbc3073 | 213 | |
920c3ed7 DM |
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 | ||
91ba3c21 DM |
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 | ||
920c3ed7 DM |
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) { | |
91ba3c21 DM |
259 | int found = 0, is_vdc_port = 0; |
260 | const char *name_prop; | |
261 | const u64 *id; | |
920c3ed7 DM |
262 | u64 fnode; |
263 | ||
91ba3c21 DM |
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 | ||
920c3ed7 | 277 | mdesc_for_each_node_by_name(b, fnode, name) { |
91ba3c21 DM |
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); | |
920c3ed7 DM |
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 | ||
778feeb4 | 325 | void mdesc_update(void) |
5cbc3073 | 326 | { |
43fdf274 DM |
327 | unsigned long len, real_len, status; |
328 | struct mdesc_handle *hp, *orig_hp; | |
329 | unsigned long flags; | |
330 | ||
920c3ed7 DM |
331 | mutex_lock(&mdesc_mutex); |
332 | ||
43fdf274 DM |
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"); | |
920c3ed7 | 338 | goto out; |
43fdf274 DM |
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); | |
920c3ed7 | 347 | goto out; |
43fdf274 | 348 | } |
5cbc3073 | 349 | |
43fdf274 DM |
350 | spin_lock_irqsave(&mdesc_lock, flags); |
351 | orig_hp = cur_mdesc; | |
352 | cur_mdesc = hp; | |
920c3ed7 | 353 | spin_unlock_irqrestore(&mdesc_lock, flags); |
5cbc3073 | 354 | |
920c3ed7 DM |
355 | mdesc_notify_clients(orig_hp, hp); |
356 | ||
357 | spin_lock_irqsave(&mdesc_lock, flags); | |
43fdf274 DM |
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); | |
920c3ed7 DM |
363 | |
364 | out: | |
365 | mutex_unlock(&mdesc_mutex); | |
5cbc3073 DM |
366 | } |
367 | ||
43fdf274 | 368 | static struct mdesc_elem *node_block(struct mdesc_hdr *mdesc) |
5cbc3073 DM |
369 | { |
370 | return (struct mdesc_elem *) (mdesc + 1); | |
371 | } | |
372 | ||
43fdf274 | 373 | static void *name_block(struct mdesc_hdr *mdesc) |
5cbc3073 DM |
374 | { |
375 | return ((void *) node_block(mdesc)) + mdesc->node_sz; | |
376 | } | |
377 | ||
43fdf274 | 378 | static void *data_block(struct mdesc_hdr *mdesc) |
5cbc3073 DM |
379 | { |
380 | return ((void *) name_block(mdesc)) + mdesc->name_sz; | |
381 | } | |
382 | ||
43fdf274 DM |
383 | u64 mdesc_node_by_name(struct mdesc_handle *hp, |
384 | u64 from_node, const char *name) | |
5cbc3073 | 385 | { |
43fdf274 DM |
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 | ||
778feeb4 DM |
391 | if (from_node == MDESC_NODE_NULL) { |
392 | ret = from_node = 0; | |
393 | } else if (from_node >= last_node) { | |
43fdf274 | 394 | return MDESC_NODE_NULL; |
778feeb4 DM |
395 | } else { |
396 | ret = ep[from_node].d.val; | |
397 | } | |
43fdf274 | 398 | |
43fdf274 DM |
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); | |
5cbc3073 | 411 | |
43fdf274 DM |
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; | |
5cbc3073 | 419 | |
43fdf274 DM |
420 | if (node == MDESC_NODE_NULL || node >= last_node) |
421 | return NULL; | |
5cbc3073 | 422 | |
43fdf274 DM |
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; | |
5cbc3073 DM |
433 | break; |
434 | ||
43fdf274 DM |
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; | |
5cbc3073 | 440 | |
43fdf274 | 441 | default: |
5cbc3073 DM |
442 | break; |
443 | } | |
43fdf274 DM |
444 | if (!val) |
445 | continue; | |
5cbc3073 | 446 | |
43fdf274 DM |
447 | if (!strcmp(names + ep->name_offset, name)) { |
448 | if (lenp) | |
449 | *lenp = len; | |
450 | return val; | |
451 | } | |
5cbc3073 DM |
452 | } |
453 | ||
43fdf274 DM |
454 | return NULL; |
455 | } | |
456 | EXPORT_SYMBOL(mdesc_get_property); | |
5cbc3073 | 457 | |
43fdf274 DM |
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; | |
5cbc3073 | 463 | |
43fdf274 DM |
464 | if (from == MDESC_NODE_NULL || from >= last_node) |
465 | return MDESC_NODE_NULL; | |
5cbc3073 | 466 | |
43fdf274 DM |
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; | |
5cbc3073 | 478 | } |
43fdf274 DM |
479 | |
480 | return MDESC_NODE_NULL; | |
5cbc3073 | 481 | } |
43fdf274 | 482 | EXPORT_SYMBOL(mdesc_next_arc); |
5cbc3073 | 483 | |
43fdf274 | 484 | u64 mdesc_arc_target(struct mdesc_handle *hp, u64 arc) |
5cbc3073 | 485 | { |
43fdf274 DM |
486 | struct mdesc_elem *ep, *base = node_block(&hp->mdesc); |
487 | ||
488 | ep = base + arc; | |
489 | ||
490 | return ep->d.val; | |
5cbc3073 | 491 | } |
43fdf274 DM |
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); | |
5cbc3073 DM |
510 | |
511 | static void __init report_platform_properties(void) | |
512 | { | |
43fdf274 DM |
513 | struct mdesc_handle *hp = mdesc_grab(); |
514 | u64 pn = mdesc_node_by_name(hp, MDESC_NODE_NULL, "platform"); | |
5cbc3073 DM |
515 | const char *s; |
516 | const u64 *v; | |
517 | ||
43fdf274 | 518 | if (pn == MDESC_NODE_NULL) { |
5cbc3073 DM |
519 | prom_printf("No platform node in machine-description.\n"); |
520 | prom_halt(); | |
521 | } | |
522 | ||
43fdf274 | 523 | s = mdesc_get_property(hp, pn, "banner-name", NULL); |
5cbc3073 | 524 | printk("PLATFORM: banner-name [%s]\n", s); |
43fdf274 | 525 | s = mdesc_get_property(hp, pn, "name", NULL); |
5cbc3073 DM |
526 | printk("PLATFORM: name [%s]\n", s); |
527 | ||
43fdf274 | 528 | v = mdesc_get_property(hp, pn, "hostid", NULL); |
5cbc3073 | 529 | if (v) |
90181136 | 530 | printk("PLATFORM: hostid [%08llx]\n", *v); |
43fdf274 | 531 | v = mdesc_get_property(hp, pn, "serial#", NULL); |
5cbc3073 | 532 | if (v) |
90181136 | 533 | printk("PLATFORM: serial# [%08llx]\n", *v); |
43fdf274 | 534 | v = mdesc_get_property(hp, pn, "stick-frequency", NULL); |
90181136 | 535 | printk("PLATFORM: stick-frequency [%08llx]\n", *v); |
43fdf274 | 536 | v = mdesc_get_property(hp, pn, "mac-address", NULL); |
5cbc3073 | 537 | if (v) |
90181136 | 538 | printk("PLATFORM: mac-address [%llx]\n", *v); |
43fdf274 | 539 | v = mdesc_get_property(hp, pn, "watchdog-resolution", NULL); |
5cbc3073 | 540 | if (v) |
90181136 | 541 | printk("PLATFORM: watchdog-resolution [%llu ms]\n", *v); |
43fdf274 | 542 | v = mdesc_get_property(hp, pn, "watchdog-max-timeout", NULL); |
5cbc3073 | 543 | if (v) |
90181136 | 544 | printk("PLATFORM: watchdog-max-timeout [%llu ms]\n", *v); |
43fdf274 | 545 | v = mdesc_get_property(hp, pn, "max-cpus", NULL); |
5cbc3073 | 546 | if (v) |
90181136 | 547 | printk("PLATFORM: max-cpus [%llu]\n", *v); |
43fdf274 | 548 | |
4f0234f4 DM |
549 | #ifdef CONFIG_SMP |
550 | { | |
551 | int max_cpu, i; | |
552 | ||
553 | if (v) { | |
554 | max_cpu = *v; | |
555 | if (max_cpu > NR_CPUS) | |
556 | max_cpu = NR_CPUS; | |
557 | } else { | |
558 | max_cpu = NR_CPUS; | |
559 | } | |
560 | for (i = 0; i < max_cpu; i++) | |
89229071 | 561 | set_cpu_possible(i, true); |
4f0234f4 DM |
562 | } |
563 | #endif | |
564 | ||
43fdf274 | 565 | mdesc_release(hp); |
5cbc3073 DM |
566 | } |
567 | ||
5052f525 | 568 | static void __cpuinit fill_in_one_cache(cpuinfo_sparc *c, |
4f0234f4 DM |
569 | struct mdesc_handle *hp, |
570 | u64 mp) | |
5cbc3073 | 571 | { |
43fdf274 DM |
572 | const u64 *level = mdesc_get_property(hp, mp, "level", NULL); |
573 | const u64 *size = mdesc_get_property(hp, mp, "size", NULL); | |
574 | const u64 *line_size = mdesc_get_property(hp, mp, "line-size", NULL); | |
5cbc3073 DM |
575 | const char *type; |
576 | int type_len; | |
577 | ||
43fdf274 | 578 | type = mdesc_get_property(hp, mp, "type", &type_len); |
5cbc3073 DM |
579 | |
580 | switch (*level) { | |
581 | case 1: | |
46bcea77 | 582 | if (of_find_in_proplist(type, "instn", type_len)) { |
5cbc3073 DM |
583 | c->icache_size = *size; |
584 | c->icache_line_size = *line_size; | |
46bcea77 | 585 | } else if (of_find_in_proplist(type, "data", type_len)) { |
5cbc3073 DM |
586 | c->dcache_size = *size; |
587 | c->dcache_line_size = *line_size; | |
588 | } | |
589 | break; | |
590 | ||
591 | case 2: | |
592 | c->ecache_size = *size; | |
593 | c->ecache_line_size = *line_size; | |
594 | break; | |
595 | ||
596 | default: | |
597 | break; | |
598 | } | |
599 | ||
600 | if (*level == 1) { | |
43fdf274 | 601 | u64 a; |
5cbc3073 | 602 | |
43fdf274 DM |
603 | mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) { |
604 | u64 target = mdesc_arc_target(hp, a); | |
605 | const char *name = mdesc_node_name(hp, target); | |
5cbc3073 | 606 | |
43fdf274 DM |
607 | if (!strcmp(name, "cache")) |
608 | fill_in_one_cache(c, hp, target); | |
5cbc3073 DM |
609 | } |
610 | } | |
611 | } | |
612 | ||
5052f525 | 613 | static void __cpuinit mark_core_ids(struct mdesc_handle *hp, u64 mp, int core_id) |
5cbc3073 | 614 | { |
43fdf274 | 615 | u64 a; |
5cbc3073 | 616 | |
43fdf274 DM |
617 | mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) { |
618 | u64 t = mdesc_arc_target(hp, a); | |
619 | const char *name; | |
5cbc3073 DM |
620 | const u64 *id; |
621 | ||
43fdf274 DM |
622 | name = mdesc_node_name(hp, t); |
623 | if (!strcmp(name, "cpu")) { | |
624 | id = mdesc_get_property(hp, t, "id", NULL); | |
5cbc3073 DM |
625 | if (*id < NR_CPUS) |
626 | cpu_data(*id).core_id = core_id; | |
627 | } else { | |
43fdf274 | 628 | u64 j; |
5cbc3073 | 629 | |
43fdf274 DM |
630 | mdesc_for_each_arc(j, hp, t, MDESC_ARC_TYPE_BACK) { |
631 | u64 n = mdesc_arc_target(hp, j); | |
632 | const char *n_name; | |
5cbc3073 | 633 | |
43fdf274 DM |
634 | n_name = mdesc_node_name(hp, n); |
635 | if (strcmp(n_name, "cpu")) | |
5cbc3073 DM |
636 | continue; |
637 | ||
43fdf274 | 638 | id = mdesc_get_property(hp, n, "id", NULL); |
5cbc3073 DM |
639 | if (*id < NR_CPUS) |
640 | cpu_data(*id).core_id = core_id; | |
641 | } | |
642 | } | |
643 | } | |
644 | } | |
645 | ||
5052f525 | 646 | static void __cpuinit set_core_ids(struct mdesc_handle *hp) |
5cbc3073 | 647 | { |
5cbc3073 | 648 | int idx; |
43fdf274 | 649 | u64 mp; |
5cbc3073 DM |
650 | |
651 | idx = 1; | |
43fdf274 DM |
652 | mdesc_for_each_node_by_name(hp, mp, "cache") { |
653 | const u64 *level; | |
5cbc3073 DM |
654 | const char *type; |
655 | int len; | |
656 | ||
43fdf274 | 657 | level = mdesc_get_property(hp, mp, "level", NULL); |
5cbc3073 DM |
658 | if (*level != 1) |
659 | continue; | |
660 | ||
43fdf274 | 661 | type = mdesc_get_property(hp, mp, "type", &len); |
46bcea77 | 662 | if (!of_find_in_proplist(type, "instn", len)) |
5cbc3073 DM |
663 | continue; |
664 | ||
43fdf274 | 665 | mark_core_ids(hp, mp, idx); |
5cbc3073 DM |
666 | |
667 | idx++; | |
668 | } | |
669 | } | |
670 | ||
5052f525 | 671 | static void __cpuinit mark_proc_ids(struct mdesc_handle *hp, u64 mp, int proc_id) |
f78eae2e | 672 | { |
43fdf274 | 673 | u64 a; |
f78eae2e | 674 | |
43fdf274 DM |
675 | mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) { |
676 | u64 t = mdesc_arc_target(hp, a); | |
677 | const char *name; | |
f78eae2e DM |
678 | const u64 *id; |
679 | ||
43fdf274 DM |
680 | name = mdesc_node_name(hp, t); |
681 | if (strcmp(name, "cpu")) | |
f78eae2e DM |
682 | continue; |
683 | ||
43fdf274 | 684 | id = mdesc_get_property(hp, t, "id", NULL); |
f78eae2e DM |
685 | if (*id < NR_CPUS) |
686 | cpu_data(*id).proc_id = proc_id; | |
687 | } | |
688 | } | |
689 | ||
5052f525 | 690 | static void __cpuinit __set_proc_ids(struct mdesc_handle *hp, const char *exec_unit_name) |
f78eae2e | 691 | { |
f78eae2e | 692 | int idx; |
43fdf274 | 693 | u64 mp; |
f78eae2e DM |
694 | |
695 | idx = 0; | |
43fdf274 | 696 | mdesc_for_each_node_by_name(hp, mp, exec_unit_name) { |
f78eae2e DM |
697 | const char *type; |
698 | int len; | |
699 | ||
43fdf274 | 700 | type = mdesc_get_property(hp, mp, "type", &len); |
46bcea77 DM |
701 | if (!of_find_in_proplist(type, "int", len) && |
702 | !of_find_in_proplist(type, "integer", len)) | |
f78eae2e DM |
703 | continue; |
704 | ||
43fdf274 | 705 | mark_proc_ids(hp, mp, idx); |
f78eae2e DM |
706 | |
707 | idx++; | |
708 | } | |
709 | } | |
710 | ||
5052f525 | 711 | static void __cpuinit set_proc_ids(struct mdesc_handle *hp) |
f78eae2e | 712 | { |
43fdf274 DM |
713 | __set_proc_ids(hp, "exec_unit"); |
714 | __set_proc_ids(hp, "exec-unit"); | |
f78eae2e DM |
715 | } |
716 | ||
5052f525 | 717 | static void __cpuinit get_one_mondo_bits(const u64 *p, unsigned int *mask, |
4f0234f4 | 718 | unsigned char def) |
5cbc3073 DM |
719 | { |
720 | u64 val; | |
721 | ||
722 | if (!p) | |
723 | goto use_default; | |
724 | val = *p; | |
725 | ||
726 | if (!val || val >= 64) | |
727 | goto use_default; | |
728 | ||
729 | *mask = ((1U << val) * 64U) - 1U; | |
730 | return; | |
731 | ||
732 | use_default: | |
733 | *mask = ((1U << def) * 64U) - 1U; | |
734 | } | |
735 | ||
5052f525 | 736 | static void __cpuinit get_mondo_data(struct mdesc_handle *hp, u64 mp, |
4f0234f4 | 737 | struct trap_per_cpu *tb) |
5cbc3073 DM |
738 | { |
739 | const u64 *val; | |
740 | ||
43fdf274 | 741 | val = mdesc_get_property(hp, mp, "q-cpu-mondo-#bits", NULL); |
5cbc3073 DM |
742 | get_one_mondo_bits(val, &tb->cpu_mondo_qmask, 7); |
743 | ||
43fdf274 | 744 | val = mdesc_get_property(hp, mp, "q-dev-mondo-#bits", NULL); |
5cbc3073 DM |
745 | get_one_mondo_bits(val, &tb->dev_mondo_qmask, 7); |
746 | ||
43fdf274 | 747 | val = mdesc_get_property(hp, mp, "q-resumable-#bits", NULL); |
5cbc3073 DM |
748 | get_one_mondo_bits(val, &tb->resum_qmask, 6); |
749 | ||
43fdf274 | 750 | val = mdesc_get_property(hp, mp, "q-nonresumable-#bits", NULL); |
5cbc3073 DM |
751 | get_one_mondo_bits(val, &tb->nonresum_qmask, 2); |
752 | } | |
753 | ||
5052f525 | 754 | static void * __cpuinit mdesc_iterate_over_cpus(void *(*func)(struct mdesc_handle *, u64, int, void *), void *arg, cpumask_t *mask) |
5cbc3073 | 755 | { |
43fdf274 | 756 | struct mdesc_handle *hp = mdesc_grab(); |
5052f525 | 757 | void *ret = NULL; |
43fdf274 | 758 | u64 mp; |
5cbc3073 | 759 | |
43fdf274 DM |
760 | mdesc_for_each_node_by_name(hp, mp, "cpu") { |
761 | const u64 *id = mdesc_get_property(hp, mp, "id", NULL); | |
5052f525 | 762 | int cpuid = *id; |
5cbc3073 DM |
763 | |
764 | #ifdef CONFIG_SMP | |
8a177c4f DM |
765 | if (cpuid >= NR_CPUS) { |
766 | printk(KERN_WARNING "Ignoring CPU %d which is " | |
767 | ">= NR_CPUS (%d)\n", | |
768 | cpuid, NR_CPUS); | |
5cbc3073 | 769 | continue; |
8a177c4f | 770 | } |
5052f525 | 771 | if (!cpu_isset(cpuid, *mask)) |
5cbc3073 | 772 | continue; |
5cbc3073 DM |
773 | #endif |
774 | ||
5052f525 DM |
775 | ret = func(hp, mp, cpuid, arg); |
776 | if (ret) | |
777 | goto out; | |
778 | } | |
779 | out: | |
780 | mdesc_release(hp); | |
781 | return ret; | |
782 | } | |
5cbc3073 | 783 | |
5052f525 DM |
784 | static void * __cpuinit record_one_cpu(struct mdesc_handle *hp, u64 mp, int cpuid, void *arg) |
785 | { | |
786 | ncpus_probed++; | |
787 | #ifdef CONFIG_SMP | |
788 | set_cpu_present(cpuid, true); | |
789 | #endif | |
790 | return NULL; | |
791 | } | |
5cbc3073 | 792 | |
5052f525 DM |
793 | void __cpuinit mdesc_populate_present_mask(cpumask_t *mask) |
794 | { | |
795 | if (tlb_type != hypervisor) | |
796 | return; | |
5cbc3073 | 797 | |
5052f525 DM |
798 | ncpus_probed = 0; |
799 | mdesc_iterate_over_cpus(record_one_cpu, NULL, mask); | |
800 | } | |
5cbc3073 | 801 | |
5052f525 DM |
802 | static void * __cpuinit fill_in_one_cpu(struct mdesc_handle *hp, u64 mp, int cpuid, void *arg) |
803 | { | |
804 | const u64 *cfreq = mdesc_get_property(hp, mp, "clock-frequency", NULL); | |
805 | struct trap_per_cpu *tb; | |
806 | cpuinfo_sparc *c; | |
807 | u64 a; | |
5cbc3073 | 808 | |
5052f525 DM |
809 | #ifndef CONFIG_SMP |
810 | /* On uniprocessor we only want the values for the | |
811 | * real physical cpu the kernel booted onto, however | |
812 | * cpu_data() only has one entry at index 0. | |
813 | */ | |
814 | if (cpuid != real_hard_smp_processor_id()) | |
815 | return NULL; | |
816 | cpuid = 0; | |
817 | #endif | |
818 | ||
819 | c = &cpu_data(cpuid); | |
820 | c->clock_tick = *cfreq; | |
821 | ||
822 | tb = &trap_block[cpuid]; | |
823 | get_mondo_data(hp, mp, tb); | |
824 | ||
825 | mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) { | |
826 | u64 j, t = mdesc_arc_target(hp, a); | |
827 | const char *t_name; | |
828 | ||
829 | t_name = mdesc_node_name(hp, t); | |
830 | if (!strcmp(t_name, "cache")) { | |
831 | fill_in_one_cache(c, hp, t); | |
832 | continue; | |
5cbc3073 DM |
833 | } |
834 | ||
5052f525 DM |
835 | mdesc_for_each_arc(j, hp, t, MDESC_ARC_TYPE_FWD) { |
836 | u64 n = mdesc_arc_target(hp, j); | |
837 | const char *n_name; | |
5cbc3073 | 838 | |
5052f525 DM |
839 | n_name = mdesc_node_name(hp, n); |
840 | if (!strcmp(n_name, "cache")) | |
841 | fill_in_one_cache(c, hp, n); | |
842 | } | |
5cbc3073 DM |
843 | } |
844 | ||
5052f525 DM |
845 | c->core_id = 0; |
846 | c->proc_id = -1; | |
847 | ||
848 | return NULL; | |
849 | } | |
850 | ||
a2094502 | 851 | void __cpuinit mdesc_fill_in_cpu_data(cpumask_t *mask) |
5052f525 DM |
852 | { |
853 | struct mdesc_handle *hp; | |
854 | ||
a2094502 | 855 | mdesc_iterate_over_cpus(fill_in_one_cpu, NULL, mask); |
5052f525 | 856 | |
a2f9f6bb DM |
857 | #ifdef CONFIG_SMP |
858 | sparc64_multi_core = 1; | |
859 | #endif | |
860 | ||
5052f525 DM |
861 | hp = mdesc_grab(); |
862 | ||
43fdf274 DM |
863 | set_core_ids(hp); |
864 | set_proc_ids(hp); | |
5cbc3073 | 865 | |
43fdf274 | 866 | mdesc_release(hp); |
5052f525 DM |
867 | |
868 | smp_fill_in_sib_core_maps(); | |
5cbc3073 DM |
869 | } |
870 | ||
0fdb7f96 DM |
871 | static ssize_t mdesc_read(struct file *file, char __user *buf, |
872 | size_t len, loff_t *offp) | |
873 | { | |
874 | struct mdesc_handle *hp = mdesc_grab(); | |
875 | int err; | |
876 | ||
877 | if (!hp) | |
878 | return -ENODEV; | |
879 | ||
880 | err = hp->handle_size; | |
881 | if (len < hp->handle_size) | |
882 | err = -EMSGSIZE; | |
883 | else if (copy_to_user(buf, &hp->mdesc, hp->handle_size)) | |
884 | err = -EFAULT; | |
885 | mdesc_release(hp); | |
886 | ||
887 | return err; | |
888 | } | |
889 | ||
890 | static const struct file_operations mdesc_fops = { | |
891 | .read = mdesc_read, | |
892 | .owner = THIS_MODULE, | |
893 | }; | |
894 | ||
895 | static struct miscdevice mdesc_misc = { | |
896 | .minor = MISC_DYNAMIC_MINOR, | |
897 | .name = "mdesc", | |
898 | .fops = &mdesc_fops, | |
899 | }; | |
900 | ||
901 | static int __init mdesc_misc_init(void) | |
902 | { | |
903 | return misc_register(&mdesc_misc); | |
904 | } | |
905 | ||
906 | __initcall(mdesc_misc_init); | |
907 | ||
5cbc3073 DM |
908 | void __init sun4v_mdesc_init(void) |
909 | { | |
43fdf274 | 910 | struct mdesc_handle *hp; |
5cbc3073 DM |
911 | unsigned long len, real_len, status; |
912 | ||
913 | (void) sun4v_mach_desc(0UL, 0UL, &len); | |
914 | ||
915 | printk("MDESC: Size is %lu bytes.\n", len); | |
916 | ||
95f72d1e | 917 | hp = mdesc_alloc(len, &memblock_mdesc_ops); |
43fdf274 DM |
918 | if (hp == NULL) { |
919 | prom_printf("MDESC: alloc of %lu bytes failed.\n", len); | |
920 | prom_halt(); | |
921 | } | |
5cbc3073 | 922 | |
43fdf274 | 923 | status = sun4v_mach_desc(__pa(&hp->mdesc), len, &real_len); |
5cbc3073 DM |
924 | if (status != HV_EOK || real_len > len) { |
925 | prom_printf("sun4v_mach_desc fails, err(%lu), " | |
926 | "len(%lu), real_len(%lu)\n", | |
927 | status, len, real_len); | |
43fdf274 | 928 | mdesc_free(hp); |
5cbc3073 DM |
929 | prom_halt(); |
930 | } | |
931 | ||
43fdf274 | 932 | cur_mdesc = hp; |
5cbc3073 DM |
933 | |
934 | report_platform_properties(); | |
5cbc3073 | 935 | } |