1 // SPDX-License-Identifier: GPL-2.0
2 /* mdesc.c: Sun4V machine description handling.
4 * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
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>
13 #include <linux/miscdevice.h>
14 #include <linux/bootmem.h>
15 #include <linux/export.h>
16 #include <linux/refcount.h>
18 #include <asm/cpudata.h>
19 #include <asm/hypervisor.h>
20 #include <asm/mdesc.h>
22 #include <linux/uaccess.h>
23 #include <asm/oplib.h>
27 /* Unlike the OBP device tree, the machine description is a full-on
28 * DAG. An arbitrary number of ARCs are possible from one
29 * node to other nodes and thus we can't use the OBP device_node
30 * data structure to represent these nodes inside of the kernel.
32 * Actually, it isn't even a DAG, because there are back pointers
33 * which create cycles in the graph.
35 * mdesc_hdr and mdesc_elem describe the layout of the data structure
36 * we get from the Hypervisor.
39 u32 version; /* Transport version */
40 u32 node_sz; /* node block size */
41 u32 name_sz; /* name block size */
42 u32 data_sz; /* data block size */
43 } __attribute__((aligned(16)));
47 #define MD_LIST_END 0x00
49 #define MD_NODE_END 0x45
51 #define MD_PROP_ARC 0x61
52 #define MD_PROP_VAL 0x76
53 #define MD_PROP_STR 0x73
54 #define MD_PROP_DATA 0x64
67 struct mdesc_mem_ops {
68 struct mdesc_handle *(*alloc)(unsigned int mdesc_size);
69 void (*free)(struct mdesc_handle *handle);
73 struct list_head list;
74 struct mdesc_mem_ops *mops;
77 unsigned int handle_size;
78 struct mdesc_hdr mdesc;
81 typedef int (*mdesc_node_info_get_f)(struct mdesc_handle *, u64,
82 union md_node_info *);
83 typedef void (*mdesc_node_info_rel_f)(union md_node_info *);
84 typedef bool (*mdesc_node_match_f)(union md_node_info *, union md_node_info *);
88 mdesc_node_info_get_f get_info;
89 mdesc_node_info_rel_f rel_info;
90 mdesc_node_match_f node_match;
93 static int get_vdev_port_node_info(struct mdesc_handle *md, u64 node,
94 union md_node_info *node_info);
95 static void rel_vdev_port_node_info(union md_node_info *node_info);
96 static bool vdev_port_node_match(union md_node_info *a_node_info,
97 union md_node_info *b_node_info);
99 static int get_ds_port_node_info(struct mdesc_handle *md, u64 node,
100 union md_node_info *node_info);
101 static void rel_ds_port_node_info(union md_node_info *node_info);
102 static bool ds_port_node_match(union md_node_info *a_node_info,
103 union md_node_info *b_node_info);
105 /* supported node types which can be registered */
106 static struct md_node_ops md_node_ops_table[] = {
107 {"virtual-device-port", get_vdev_port_node_info,
108 rel_vdev_port_node_info, vdev_port_node_match},
109 {"domain-services-port", get_ds_port_node_info,
110 rel_ds_port_node_info, ds_port_node_match},
111 {NULL, NULL, NULL, NULL}
114 static void mdesc_get_node_ops(const char *node_name,
115 mdesc_node_info_get_f *get_info_f,
116 mdesc_node_info_rel_f *rel_info_f,
117 mdesc_node_match_f *match_f)
133 for (i = 0; md_node_ops_table[i].name != NULL; i++) {
134 if (strcmp(md_node_ops_table[i].name, node_name) == 0) {
136 *get_info_f = md_node_ops_table[i].get_info;
139 *rel_info_f = md_node_ops_table[i].rel_info;
142 *match_f = md_node_ops_table[i].node_match;
149 static void mdesc_handle_init(struct mdesc_handle *hp,
150 unsigned int handle_size,
153 BUG_ON(((unsigned long)&hp->mdesc) & (16UL - 1));
155 memset(hp, 0, handle_size);
156 INIT_LIST_HEAD(&hp->list);
157 hp->self_base = base;
158 refcount_set(&hp->refcnt, 1);
159 hp->handle_size = handle_size;
162 static struct mdesc_handle * __init mdesc_memblock_alloc(unsigned int mdesc_size)
164 unsigned int handle_size, alloc_size;
165 struct mdesc_handle *hp;
168 handle_size = (sizeof(struct mdesc_handle) -
169 sizeof(struct mdesc_hdr) +
171 alloc_size = PAGE_ALIGN(handle_size);
173 paddr = memblock_phys_alloc(alloc_size, PAGE_SIZE);
178 mdesc_handle_init(hp, handle_size, hp);
183 static void __init mdesc_memblock_free(struct mdesc_handle *hp)
185 unsigned int alloc_size;
188 BUG_ON(refcount_read(&hp->refcnt) != 0);
189 BUG_ON(!list_empty(&hp->list));
191 alloc_size = PAGE_ALIGN(hp->handle_size);
193 free_bootmem_late(start, alloc_size);
196 static struct mdesc_mem_ops memblock_mdesc_ops = {
197 .alloc = mdesc_memblock_alloc,
198 .free = mdesc_memblock_free,
201 static struct mdesc_handle *mdesc_kmalloc(unsigned int mdesc_size)
203 unsigned int handle_size;
204 struct mdesc_handle *hp;
208 handle_size = (sizeof(struct mdesc_handle) -
209 sizeof(struct mdesc_hdr) +
211 base = kmalloc(handle_size + 15, GFP_KERNEL | __GFP_RETRY_MAYFAIL);
215 addr = (unsigned long)base;
216 addr = (addr + 15UL) & ~15UL;
217 hp = (struct mdesc_handle *) addr;
219 mdesc_handle_init(hp, handle_size, base);
224 static void mdesc_kfree(struct mdesc_handle *hp)
226 BUG_ON(refcount_read(&hp->refcnt) != 0);
227 BUG_ON(!list_empty(&hp->list));
229 kfree(hp->self_base);
232 static struct mdesc_mem_ops kmalloc_mdesc_memops = {
233 .alloc = mdesc_kmalloc,
237 static struct mdesc_handle *mdesc_alloc(unsigned int mdesc_size,
238 struct mdesc_mem_ops *mops)
240 struct mdesc_handle *hp = mops->alloc(mdesc_size);
248 static void mdesc_free(struct mdesc_handle *hp)
253 static struct mdesc_handle *cur_mdesc;
254 static LIST_HEAD(mdesc_zombie_list);
255 static DEFINE_SPINLOCK(mdesc_lock);
257 struct mdesc_handle *mdesc_grab(void)
259 struct mdesc_handle *hp;
262 spin_lock_irqsave(&mdesc_lock, flags);
265 refcount_inc(&hp->refcnt);
266 spin_unlock_irqrestore(&mdesc_lock, flags);
270 EXPORT_SYMBOL(mdesc_grab);
272 void mdesc_release(struct mdesc_handle *hp)
276 spin_lock_irqsave(&mdesc_lock, flags);
277 if (refcount_dec_and_test(&hp->refcnt)) {
278 list_del_init(&hp->list);
281 spin_unlock_irqrestore(&mdesc_lock, flags);
283 EXPORT_SYMBOL(mdesc_release);
285 static DEFINE_MUTEX(mdesc_mutex);
286 static struct mdesc_notifier_client *client_list;
288 void mdesc_register_notifier(struct mdesc_notifier_client *client)
290 bool supported = false;
294 mutex_lock(&mdesc_mutex);
296 /* check to see if the node is supported for registration */
297 for (i = 0; md_node_ops_table[i].name != NULL; i++) {
298 if (strcmp(md_node_ops_table[i].name, client->node_name) == 0) {
305 pr_err("MD: %s node not supported\n", client->node_name);
306 mutex_unlock(&mdesc_mutex);
310 client->next = client_list;
311 client_list = client;
313 mdesc_for_each_node_by_name(cur_mdesc, node, client->node_name)
314 client->add(cur_mdesc, node, client->node_name);
316 mutex_unlock(&mdesc_mutex);
319 static const u64 *parent_cfg_handle(struct mdesc_handle *hp, u64 node)
325 mdesc_for_each_arc(a, hp, node, MDESC_ARC_TYPE_BACK) {
328 target = mdesc_arc_target(hp, a);
329 id = mdesc_get_property(hp, target,
338 static int get_vdev_port_node_info(struct mdesc_handle *md, u64 node,
339 union md_node_info *node_info)
341 const u64 *parent_cfg_hdlp;
346 * Virtual device nodes are distinguished by:
349 * 3. parent node "cfg-handle" property
351 idp = mdesc_get_property(md, node, "id", NULL);
352 name = mdesc_get_property(md, node, "name", NULL);
353 parent_cfg_hdlp = parent_cfg_handle(md, node);
355 if (!idp || !name || !parent_cfg_hdlp)
358 node_info->vdev_port.id = *idp;
359 node_info->vdev_port.name = kstrdup_const(name, GFP_KERNEL);
360 node_info->vdev_port.parent_cfg_hdl = *parent_cfg_hdlp;
365 static void rel_vdev_port_node_info(union md_node_info *node_info)
367 if (node_info && node_info->vdev_port.name) {
368 kfree_const(node_info->vdev_port.name);
369 node_info->vdev_port.name = NULL;
373 static bool vdev_port_node_match(union md_node_info *a_node_info,
374 union md_node_info *b_node_info)
376 if (a_node_info->vdev_port.id != b_node_info->vdev_port.id)
379 if (a_node_info->vdev_port.parent_cfg_hdl !=
380 b_node_info->vdev_port.parent_cfg_hdl)
383 if (strncmp(a_node_info->vdev_port.name,
384 b_node_info->vdev_port.name, MDESC_MAX_STR_LEN) != 0)
390 static int get_ds_port_node_info(struct mdesc_handle *md, u64 node,
391 union md_node_info *node_info)
395 /* DS port nodes use the "id" property to distinguish them */
396 idp = mdesc_get_property(md, node, "id", NULL);
400 node_info->ds_port.id = *idp;
405 static void rel_ds_port_node_info(union md_node_info *node_info)
409 static bool ds_port_node_match(union md_node_info *a_node_info,
410 union md_node_info *b_node_info)
412 if (a_node_info->ds_port.id != b_node_info->ds_port.id)
418 /* Run 'func' on nodes which are in A but not in B. */
419 static void invoke_on_missing(const char *name,
420 struct mdesc_handle *a,
421 struct mdesc_handle *b,
422 void (*func)(struct mdesc_handle *, u64,
423 const char *node_name))
425 mdesc_node_info_get_f get_info_func;
426 mdesc_node_info_rel_f rel_info_func;
427 mdesc_node_match_f node_match_func;
428 union md_node_info a_node_info;
429 union md_node_info b_node_info;
436 * Find the get_info, rel_info and node_match ops for the given
439 mdesc_get_node_ops(name, &get_info_func, &rel_info_func,
442 /* If we didn't find a match, the node type is not supported */
443 if (!get_info_func || !rel_info_func || !node_match_func) {
444 pr_err("MD: %s node type is not supported\n", name);
448 mdesc_for_each_node_by_name(a, a_node, name) {
451 rv = get_info_func(a, a_node, &a_node_info);
453 pr_err("MD: Cannot find 1 or more required match properties for %s node.\n",
458 /* Check each node in B for node matching a_node */
459 mdesc_for_each_node_by_name(b, b_node, name) {
460 rv = get_info_func(b, b_node, &b_node_info);
464 if (node_match_func(&a_node_info, &b_node_info)) {
466 rel_info_func(&b_node_info);
470 rel_info_func(&b_node_info);
473 rel_info_func(&a_node_info);
476 func(a, a_node, name);
480 static void notify_one(struct mdesc_notifier_client *p,
481 struct mdesc_handle *old_hp,
482 struct mdesc_handle *new_hp)
484 invoke_on_missing(p->node_name, old_hp, new_hp, p->remove);
485 invoke_on_missing(p->node_name, new_hp, old_hp, p->add);
488 static void mdesc_notify_clients(struct mdesc_handle *old_hp,
489 struct mdesc_handle *new_hp)
491 struct mdesc_notifier_client *p = client_list;
494 notify_one(p, old_hp, new_hp);
499 void mdesc_update(void)
501 unsigned long len, real_len, status;
502 struct mdesc_handle *hp, *orig_hp;
505 mutex_lock(&mdesc_mutex);
507 (void) sun4v_mach_desc(0UL, 0UL, &len);
509 hp = mdesc_alloc(len, &kmalloc_mdesc_memops);
511 printk(KERN_ERR "MD: mdesc alloc fails\n");
515 status = sun4v_mach_desc(__pa(&hp->mdesc), len, &real_len);
516 if (status != HV_EOK || real_len > len) {
517 printk(KERN_ERR "MD: mdesc reread fails with %lu\n",
519 refcount_dec(&hp->refcnt);
524 spin_lock_irqsave(&mdesc_lock, flags);
527 spin_unlock_irqrestore(&mdesc_lock, flags);
529 mdesc_notify_clients(orig_hp, hp);
531 spin_lock_irqsave(&mdesc_lock, flags);
532 if (refcount_dec_and_test(&orig_hp->refcnt))
535 list_add(&orig_hp->list, &mdesc_zombie_list);
536 spin_unlock_irqrestore(&mdesc_lock, flags);
539 mutex_unlock(&mdesc_mutex);
542 u64 mdesc_get_node(struct mdesc_handle *hp, const char *node_name,
543 union md_node_info *node_info)
545 mdesc_node_info_get_f get_info_func;
546 mdesc_node_info_rel_f rel_info_func;
547 mdesc_node_match_f node_match_func;
548 union md_node_info hp_node_info;
552 if (hp == NULL || node_name == NULL || node_info == NULL)
553 return MDESC_NODE_NULL;
555 /* Find the ops for the given node name */
556 mdesc_get_node_ops(node_name, &get_info_func, &rel_info_func,
559 /* If we didn't find ops for the given node name, it is not supported */
560 if (!get_info_func || !rel_info_func || !node_match_func) {
561 pr_err("MD: %s node is not supported\n", node_name);
565 mdesc_for_each_node_by_name(hp, hp_node, node_name) {
566 rv = get_info_func(hp, hp_node, &hp_node_info);
570 if (node_match_func(node_info, &hp_node_info))
573 rel_info_func(&hp_node_info);
576 rel_info_func(&hp_node_info);
580 EXPORT_SYMBOL(mdesc_get_node);
582 int mdesc_get_node_info(struct mdesc_handle *hp, u64 node,
583 const char *node_name, union md_node_info *node_info)
585 mdesc_node_info_get_f get_info_func;
588 if (hp == NULL || node == MDESC_NODE_NULL ||
589 node_name == NULL || node_info == NULL)
592 /* Find the get_info op for the given node name */
593 mdesc_get_node_ops(node_name, &get_info_func, NULL, NULL);
595 /* If we didn't find a get_info_func, the node name is not supported */
596 if (get_info_func == NULL) {
597 pr_err("MD: %s node is not supported\n", node_name);
601 rv = get_info_func(hp, node, node_info);
603 pr_err("MD: Cannot find 1 or more required match properties for %s node.\n",
610 EXPORT_SYMBOL(mdesc_get_node_info);
612 static struct mdesc_elem *node_block(struct mdesc_hdr *mdesc)
614 return (struct mdesc_elem *) (mdesc + 1);
617 static void *name_block(struct mdesc_hdr *mdesc)
619 return ((void *) node_block(mdesc)) + mdesc->node_sz;
622 static void *data_block(struct mdesc_hdr *mdesc)
624 return ((void *) name_block(mdesc)) + mdesc->name_sz;
627 u64 mdesc_node_by_name(struct mdesc_handle *hp,
628 u64 from_node, const char *name)
630 struct mdesc_elem *ep = node_block(&hp->mdesc);
631 const char *names = name_block(&hp->mdesc);
632 u64 last_node = hp->mdesc.node_sz / 16;
635 if (from_node == MDESC_NODE_NULL) {
637 } else if (from_node >= last_node) {
638 return MDESC_NODE_NULL;
640 ret = ep[from_node].d.val;
643 while (ret < last_node) {
644 if (ep[ret].tag != MD_NODE)
645 return MDESC_NODE_NULL;
646 if (!strcmp(names + ep[ret].name_offset, name))
650 if (ret >= last_node)
651 ret = MDESC_NODE_NULL;
654 EXPORT_SYMBOL(mdesc_node_by_name);
656 const void *mdesc_get_property(struct mdesc_handle *hp, u64 node,
657 const char *name, int *lenp)
659 const char *names = name_block(&hp->mdesc);
660 u64 last_node = hp->mdesc.node_sz / 16;
661 void *data = data_block(&hp->mdesc);
662 struct mdesc_elem *ep;
664 if (node == MDESC_NODE_NULL || node >= last_node)
667 ep = node_block(&hp->mdesc) + node;
669 for (; ep->tag != MD_NODE_END; ep++) {
681 val = data + ep->d.data.data_offset;
682 len = ep->d.data.data_len;
691 if (!strcmp(names + ep->name_offset, name)) {
700 EXPORT_SYMBOL(mdesc_get_property);
702 u64 mdesc_next_arc(struct mdesc_handle *hp, u64 from, const char *arc_type)
704 struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
705 const char *names = name_block(&hp->mdesc);
706 u64 last_node = hp->mdesc.node_sz / 16;
708 if (from == MDESC_NODE_NULL || from >= last_node)
709 return MDESC_NODE_NULL;
714 for (; ep->tag != MD_NODE_END; ep++) {
715 if (ep->tag != MD_PROP_ARC)
718 if (strcmp(names + ep->name_offset, arc_type))
724 return MDESC_NODE_NULL;
726 EXPORT_SYMBOL(mdesc_next_arc);
728 u64 mdesc_arc_target(struct mdesc_handle *hp, u64 arc)
730 struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
736 EXPORT_SYMBOL(mdesc_arc_target);
738 const char *mdesc_node_name(struct mdesc_handle *hp, u64 node)
740 struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
741 const char *names = name_block(&hp->mdesc);
742 u64 last_node = hp->mdesc.node_sz / 16;
744 if (node == MDESC_NODE_NULL || node >= last_node)
748 if (ep->tag != MD_NODE)
751 return names + ep->name_offset;
753 EXPORT_SYMBOL(mdesc_node_name);
755 static u64 max_cpus = 64;
757 static void __init report_platform_properties(void)
759 struct mdesc_handle *hp = mdesc_grab();
760 u64 pn = mdesc_node_by_name(hp, MDESC_NODE_NULL, "platform");
764 if (pn == MDESC_NODE_NULL) {
765 prom_printf("No platform node in machine-description.\n");
769 s = mdesc_get_property(hp, pn, "banner-name", NULL);
770 printk("PLATFORM: banner-name [%s]\n", s);
771 s = mdesc_get_property(hp, pn, "name", NULL);
772 printk("PLATFORM: name [%s]\n", s);
774 v = mdesc_get_property(hp, pn, "hostid", NULL);
776 printk("PLATFORM: hostid [%08llx]\n", *v);
777 v = mdesc_get_property(hp, pn, "serial#", NULL);
779 printk("PLATFORM: serial# [%08llx]\n", *v);
780 v = mdesc_get_property(hp, pn, "stick-frequency", NULL);
781 printk("PLATFORM: stick-frequency [%08llx]\n", *v);
782 v = mdesc_get_property(hp, pn, "mac-address", NULL);
784 printk("PLATFORM: mac-address [%llx]\n", *v);
785 v = mdesc_get_property(hp, pn, "watchdog-resolution", NULL);
787 printk("PLATFORM: watchdog-resolution [%llu ms]\n", *v);
788 v = mdesc_get_property(hp, pn, "watchdog-max-timeout", NULL);
790 printk("PLATFORM: watchdog-max-timeout [%llu ms]\n", *v);
791 v = mdesc_get_property(hp, pn, "max-cpus", NULL);
794 printk("PLATFORM: max-cpus [%llu]\n", max_cpus);
803 if (max_cpu > NR_CPUS)
808 for (i = 0; i < max_cpu; i++)
809 set_cpu_possible(i, true);
816 static void fill_in_one_cache(cpuinfo_sparc *c, struct mdesc_handle *hp, u64 mp)
818 const u64 *level = mdesc_get_property(hp, mp, "level", NULL);
819 const u64 *size = mdesc_get_property(hp, mp, "size", NULL);
820 const u64 *line_size = mdesc_get_property(hp, mp, "line-size", NULL);
824 type = mdesc_get_property(hp, mp, "type", &type_len);
828 if (of_find_in_proplist(type, "instn", type_len)) {
829 c->icache_size = *size;
830 c->icache_line_size = *line_size;
831 } else if (of_find_in_proplist(type, "data", type_len)) {
832 c->dcache_size = *size;
833 c->dcache_line_size = *line_size;
838 c->ecache_size = *size;
839 c->ecache_line_size = *line_size;
849 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
850 u64 target = mdesc_arc_target(hp, a);
851 const char *name = mdesc_node_name(hp, target);
853 if (!strcmp(name, "cache"))
854 fill_in_one_cache(c, hp, target);
859 static void find_back_node_value(struct mdesc_handle *hp, u64 node,
861 void (*func)(struct mdesc_handle *, u64, int),
866 /* Since we have an estimate of recursion depth, do a sanity check. */
870 mdesc_for_each_arc(arc, hp, node, MDESC_ARC_TYPE_BACK) {
871 u64 n = mdesc_arc_target(hp, arc);
872 const char *name = mdesc_node_name(hp, n);
874 if (!strcmp(srch_val, name))
877 find_back_node_value(hp, n, srch_val, func, val, depth-1);
881 static void __mark_core_id(struct mdesc_handle *hp, u64 node,
884 const u64 *id = mdesc_get_property(hp, node, "id", NULL);
886 if (*id < num_possible_cpus())
887 cpu_data(*id).core_id = core_id;
890 static void __mark_max_cache_id(struct mdesc_handle *hp, u64 node,
893 const u64 *id = mdesc_get_property(hp, node, "id", NULL);
895 if (*id < num_possible_cpus()) {
896 cpu_data(*id).max_cache_id = max_cache_id;
899 * On systems without explicit socket descriptions socket
902 cpu_data(*id).sock_id = max_cache_id;
906 static void mark_core_ids(struct mdesc_handle *hp, u64 mp,
909 find_back_node_value(hp, mp, "cpu", __mark_core_id, core_id, 10);
912 static void mark_max_cache_ids(struct mdesc_handle *hp, u64 mp,
915 find_back_node_value(hp, mp, "cpu", __mark_max_cache_id,
919 static void set_core_ids(struct mdesc_handle *hp)
926 /* Identify unique cores by looking for cpus backpointed to by
927 * level 1 instruction caches.
929 mdesc_for_each_node_by_name(hp, mp, "cache") {
934 level = mdesc_get_property(hp, mp, "level", NULL);
938 type = mdesc_get_property(hp, mp, "type", &len);
939 if (!of_find_in_proplist(type, "instn", len))
942 mark_core_ids(hp, mp, idx);
947 static int set_max_cache_ids_by_cache(struct mdesc_handle *hp, int level)
954 * Identify unique highest level of shared cache by looking for cpus
955 * backpointed to by shared level N caches.
957 mdesc_for_each_node_by_name(hp, mp, "cache") {
960 cur_lvl = mdesc_get_property(hp, mp, "level", NULL);
961 if (*cur_lvl != level)
963 mark_max_cache_ids(hp, mp, idx);
970 static void set_sock_ids_by_socket(struct mdesc_handle *hp, u64 mp)
974 mdesc_for_each_node_by_name(hp, mp, "socket") {
977 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
978 u64 t = mdesc_arc_target(hp, a);
982 name = mdesc_node_name(hp, t);
983 if (strcmp(name, "cpu"))
986 id = mdesc_get_property(hp, t, "id", NULL);
987 if (*id < num_possible_cpus())
988 cpu_data(*id).sock_id = idx;
994 static void set_sock_ids(struct mdesc_handle *hp)
999 * Find the highest level of shared cache which pre-T7 is also
1002 if (!set_max_cache_ids_by_cache(hp, 3))
1003 set_max_cache_ids_by_cache(hp, 2);
1005 /* If machine description exposes sockets data use it.*/
1006 mp = mdesc_node_by_name(hp, MDESC_NODE_NULL, "sockets");
1007 if (mp != MDESC_NODE_NULL)
1008 set_sock_ids_by_socket(hp, mp);
1011 static void mark_proc_ids(struct mdesc_handle *hp, u64 mp, int proc_id)
1015 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) {
1016 u64 t = mdesc_arc_target(hp, a);
1020 name = mdesc_node_name(hp, t);
1021 if (strcmp(name, "cpu"))
1024 id = mdesc_get_property(hp, t, "id", NULL);
1026 cpu_data(*id).proc_id = proc_id;
1030 static void __set_proc_ids(struct mdesc_handle *hp, const char *exec_unit_name)
1036 mdesc_for_each_node_by_name(hp, mp, exec_unit_name) {
1040 type = mdesc_get_property(hp, mp, "type", &len);
1041 if (!of_find_in_proplist(type, "int", len) &&
1042 !of_find_in_proplist(type, "integer", len))
1045 mark_proc_ids(hp, mp, idx);
1050 static void set_proc_ids(struct mdesc_handle *hp)
1052 __set_proc_ids(hp, "exec_unit");
1053 __set_proc_ids(hp, "exec-unit");
1056 static void get_one_mondo_bits(const u64 *p, unsigned int *mask,
1057 unsigned long def, unsigned long max)
1065 if (!val || val >= 64)
1071 *mask = ((1U << val) * 64U) - 1U;
1075 *mask = ((1U << def) * 64U) - 1U;
1078 static void get_mondo_data(struct mdesc_handle *hp, u64 mp,
1079 struct trap_per_cpu *tb)
1084 val = mdesc_get_property(hp, mp, "q-cpu-mondo-#bits", NULL);
1085 get_one_mondo_bits(val, &tb->cpu_mondo_qmask, 7, ilog2(max_cpus * 2));
1087 val = mdesc_get_property(hp, mp, "q-dev-mondo-#bits", NULL);
1088 get_one_mondo_bits(val, &tb->dev_mondo_qmask, 7, 8);
1090 val = mdesc_get_property(hp, mp, "q-resumable-#bits", NULL);
1091 get_one_mondo_bits(val, &tb->resum_qmask, 6, 7);
1093 val = mdesc_get_property(hp, mp, "q-nonresumable-#bits", NULL);
1094 get_one_mondo_bits(val, &tb->nonresum_qmask, 2, 2);
1096 pr_info("SUN4V: Mondo queue sizes "
1097 "[cpu(%u) dev(%u) r(%u) nr(%u)]\n",
1098 tb->cpu_mondo_qmask + 1,
1099 tb->dev_mondo_qmask + 1,
1100 tb->resum_qmask + 1,
1101 tb->nonresum_qmask + 1);
1105 static void *mdesc_iterate_over_cpus(void *(*func)(struct mdesc_handle *, u64, int, void *), void *arg, cpumask_t *mask)
1107 struct mdesc_handle *hp = mdesc_grab();
1111 mdesc_for_each_node_by_name(hp, mp, "cpu") {
1112 const u64 *id = mdesc_get_property(hp, mp, "id", NULL);
1116 if (cpuid >= NR_CPUS) {
1117 printk(KERN_WARNING "Ignoring CPU %d which is "
1118 ">= NR_CPUS (%d)\n",
1122 if (!cpumask_test_cpu(cpuid, mask))
1126 ret = func(hp, mp, cpuid, arg);
1135 static void *record_one_cpu(struct mdesc_handle *hp, u64 mp, int cpuid,
1140 set_cpu_present(cpuid, true);
1145 void mdesc_populate_present_mask(cpumask_t *mask)
1147 if (tlb_type != hypervisor)
1151 mdesc_iterate_over_cpus(record_one_cpu, NULL, mask);
1154 static void * __init check_one_pgsz(struct mdesc_handle *hp, u64 mp, int cpuid, void *arg)
1156 const u64 *pgsz_prop = mdesc_get_property(hp, mp, "mmu-page-size-list", NULL);
1157 unsigned long *pgsz_mask = arg;
1160 val = (HV_PGSZ_MASK_8K | HV_PGSZ_MASK_64K |
1161 HV_PGSZ_MASK_512K | HV_PGSZ_MASK_4MB);
1172 void __init mdesc_get_page_sizes(cpumask_t *mask, unsigned long *pgsz_mask)
1175 mdesc_iterate_over_cpus(check_one_pgsz, pgsz_mask, mask);
1178 static void *fill_in_one_cpu(struct mdesc_handle *hp, u64 mp, int cpuid,
1181 const u64 *cfreq = mdesc_get_property(hp, mp, "clock-frequency", NULL);
1182 struct trap_per_cpu *tb;
1187 /* On uniprocessor we only want the values for the
1188 * real physical cpu the kernel booted onto, however
1189 * cpu_data() only has one entry at index 0.
1191 if (cpuid != real_hard_smp_processor_id())
1196 c = &cpu_data(cpuid);
1197 c->clock_tick = *cfreq;
1199 tb = &trap_block[cpuid];
1200 get_mondo_data(hp, mp, tb);
1202 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
1203 u64 j, t = mdesc_arc_target(hp, a);
1206 t_name = mdesc_node_name(hp, t);
1207 if (!strcmp(t_name, "cache")) {
1208 fill_in_one_cache(c, hp, t);
1212 mdesc_for_each_arc(j, hp, t, MDESC_ARC_TYPE_FWD) {
1213 u64 n = mdesc_arc_target(hp, j);
1216 n_name = mdesc_node_name(hp, n);
1217 if (!strcmp(n_name, "cache"))
1218 fill_in_one_cache(c, hp, n);
1228 void mdesc_fill_in_cpu_data(cpumask_t *mask)
1230 struct mdesc_handle *hp;
1232 mdesc_iterate_over_cpus(fill_in_one_cpu, NULL, mask);
1242 smp_fill_in_sib_core_maps();
1245 /* mdesc_open() - Grab a reference to mdesc_handle when /dev/mdesc is
1246 * opened. Hold this reference until /dev/mdesc is closed to ensure
1247 * mdesc data structure is not released underneath us. Store the
1248 * pointer to mdesc structure in private_data for read and seek to use
1250 static int mdesc_open(struct inode *inode, struct file *file)
1252 struct mdesc_handle *hp = mdesc_grab();
1257 file->private_data = hp;
1262 static ssize_t mdesc_read(struct file *file, char __user *buf,
1263 size_t len, loff_t *offp)
1265 struct mdesc_handle *hp = file->private_data;
1266 unsigned char *mdesc;
1267 int bytes_left, count = len;
1269 if (*offp >= hp->handle_size)
1272 bytes_left = hp->handle_size - *offp;
1273 if (count > bytes_left)
1276 mdesc = (unsigned char *)&hp->mdesc;
1278 if (!copy_to_user(buf, mdesc, count)) {
1286 static loff_t mdesc_llseek(struct file *file, loff_t offset, int whence)
1288 struct mdesc_handle *hp = file->private_data;
1290 return no_seek_end_llseek_size(file, offset, whence, hp->handle_size);
1293 /* mdesc_close() - /dev/mdesc is being closed, release the reference to
1296 static int mdesc_close(struct inode *inode, struct file *file)
1298 mdesc_release(file->private_data);
1302 static const struct file_operations mdesc_fops = {
1305 .llseek = mdesc_llseek,
1306 .release = mdesc_close,
1307 .owner = THIS_MODULE,
1310 static struct miscdevice mdesc_misc = {
1311 .minor = MISC_DYNAMIC_MINOR,
1313 .fops = &mdesc_fops,
1316 static int __init mdesc_misc_init(void)
1318 return misc_register(&mdesc_misc);
1321 __initcall(mdesc_misc_init);
1323 void __init sun4v_mdesc_init(void)
1325 struct mdesc_handle *hp;
1326 unsigned long len, real_len, status;
1328 (void) sun4v_mach_desc(0UL, 0UL, &len);
1330 printk("MDESC: Size is %lu bytes.\n", len);
1332 hp = mdesc_alloc(len, &memblock_mdesc_ops);
1334 prom_printf("MDESC: alloc of %lu bytes failed.\n", len);
1338 status = sun4v_mach_desc(__pa(&hp->mdesc), len, &real_len);
1339 if (status != HV_EOK || real_len > len) {
1340 prom_printf("sun4v_mach_desc fails, err(%lu), "
1341 "len(%lu), real_len(%lu)\n",
1342 status, len, real_len);
1350 report_platform_properties();