1 /* mdesc.c: Sun4V machine description handling.
3 * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
5 #include <linux/kernel.h>
6 #include <linux/types.h>
7 #include <linux/memblock.h>
8 #include <linux/log2.h>
9 #include <linux/list.h>
10 #include <linux/slab.h>
12 #include <linux/miscdevice.h>
13 #include <linux/bootmem.h>
14 #include <linux/export.h>
15 #include <linux/refcount.h>
17 #include <asm/cpudata.h>
18 #include <asm/hypervisor.h>
19 #include <asm/mdesc.h>
21 #include <linux/uaccess.h>
22 #include <asm/oplib.h>
25 /* Unlike the OBP device tree, the machine description is a full-on
26 * DAG. An arbitrary number of ARCs are possible from one
27 * node to other nodes and thus we can't use the OBP device_node
28 * data structure to represent these nodes inside of the kernel.
30 * Actually, it isn't even a DAG, because there are back pointers
31 * which create cycles in the graph.
33 * mdesc_hdr and mdesc_elem describe the layout of the data structure
34 * we get from the Hypervisor.
37 u32 version; /* Transport version */
38 u32 node_sz; /* node block size */
39 u32 name_sz; /* name block size */
40 u32 data_sz; /* data block size */
41 } __attribute__((aligned(16)));
45 #define MD_LIST_END 0x00
47 #define MD_NODE_END 0x45
49 #define MD_PROP_ARC 0x61
50 #define MD_PROP_VAL 0x76
51 #define MD_PROP_STR 0x73
52 #define MD_PROP_DATA 0x64
65 struct mdesc_mem_ops {
66 struct mdesc_handle *(*alloc)(unsigned int mdesc_size);
67 void (*free)(struct mdesc_handle *handle);
71 struct list_head list;
72 struct mdesc_mem_ops *mops;
75 unsigned int handle_size;
76 struct mdesc_hdr mdesc;
79 typedef int (*mdesc_node_info_get_f)(struct mdesc_handle *, u64,
80 union md_node_info *);
81 typedef void (*mdesc_node_info_rel_f)(union md_node_info *);
82 typedef bool (*mdesc_node_match_f)(union md_node_info *, union md_node_info *);
86 mdesc_node_info_get_f get_info;
87 mdesc_node_info_rel_f rel_info;
88 mdesc_node_match_f node_match;
91 static int get_vdev_port_node_info(struct mdesc_handle *md, u64 node,
92 union md_node_info *node_info);
93 static void rel_vdev_port_node_info(union md_node_info *node_info);
94 static bool vdev_port_node_match(union md_node_info *a_node_info,
95 union md_node_info *b_node_info);
97 static int get_ds_port_node_info(struct mdesc_handle *md, u64 node,
98 union md_node_info *node_info);
99 static void rel_ds_port_node_info(union md_node_info *node_info);
100 static bool ds_port_node_match(union md_node_info *a_node_info,
101 union md_node_info *b_node_info);
103 /* supported node types which can be registered */
104 static 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}
112 static 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)
131 for (i = 0; md_node_ops_table[i].name != NULL; i++) {
132 if (strcmp(md_node_ops_table[i].name, node_name) == 0) {
134 *get_info_f = md_node_ops_table[i].get_info;
137 *rel_info_f = md_node_ops_table[i].rel_info;
140 *match_f = md_node_ops_table[i].node_match;
147 static void mdesc_handle_init(struct mdesc_handle *hp,
148 unsigned int handle_size,
151 BUG_ON(((unsigned long)&hp->mdesc) & (16UL - 1));
153 memset(hp, 0, handle_size);
154 INIT_LIST_HEAD(&hp->list);
155 hp->self_base = base;
156 refcount_set(&hp->refcnt, 1);
157 hp->handle_size = handle_size;
160 static struct mdesc_handle * __init mdesc_memblock_alloc(unsigned int mdesc_size)
162 unsigned int handle_size, alloc_size;
163 struct mdesc_handle *hp;
166 handle_size = (sizeof(struct mdesc_handle) -
167 sizeof(struct mdesc_hdr) +
169 alloc_size = PAGE_ALIGN(handle_size);
171 paddr = memblock_alloc(alloc_size, PAGE_SIZE);
176 mdesc_handle_init(hp, handle_size, hp);
181 static void __init mdesc_memblock_free(struct mdesc_handle *hp)
183 unsigned int alloc_size;
186 BUG_ON(refcount_read(&hp->refcnt) != 0);
187 BUG_ON(!list_empty(&hp->list));
189 alloc_size = PAGE_ALIGN(hp->handle_size);
191 free_bootmem_late(start, alloc_size);
194 static struct mdesc_mem_ops memblock_mdesc_ops = {
195 .alloc = mdesc_memblock_alloc,
196 .free = mdesc_memblock_free,
199 static struct mdesc_handle *mdesc_kmalloc(unsigned int mdesc_size)
201 unsigned int handle_size;
202 struct mdesc_handle *hp;
206 handle_size = (sizeof(struct mdesc_handle) -
207 sizeof(struct mdesc_hdr) +
209 base = kmalloc(handle_size + 15, GFP_KERNEL | __GFP_RETRY_MAYFAIL);
213 addr = (unsigned long)base;
214 addr = (addr + 15UL) & ~15UL;
215 hp = (struct mdesc_handle *) addr;
217 mdesc_handle_init(hp, handle_size, base);
222 static void mdesc_kfree(struct mdesc_handle *hp)
224 BUG_ON(refcount_read(&hp->refcnt) != 0);
225 BUG_ON(!list_empty(&hp->list));
227 kfree(hp->self_base);
230 static struct mdesc_mem_ops kmalloc_mdesc_memops = {
231 .alloc = mdesc_kmalloc,
235 static struct mdesc_handle *mdesc_alloc(unsigned int mdesc_size,
236 struct mdesc_mem_ops *mops)
238 struct mdesc_handle *hp = mops->alloc(mdesc_size);
246 static void mdesc_free(struct mdesc_handle *hp)
251 static struct mdesc_handle *cur_mdesc;
252 static LIST_HEAD(mdesc_zombie_list);
253 static DEFINE_SPINLOCK(mdesc_lock);
255 struct mdesc_handle *mdesc_grab(void)
257 struct mdesc_handle *hp;
260 spin_lock_irqsave(&mdesc_lock, flags);
263 refcount_inc(&hp->refcnt);
264 spin_unlock_irqrestore(&mdesc_lock, flags);
268 EXPORT_SYMBOL(mdesc_grab);
270 void mdesc_release(struct mdesc_handle *hp)
274 spin_lock_irqsave(&mdesc_lock, flags);
275 if (refcount_dec_and_test(&hp->refcnt)) {
276 list_del_init(&hp->list);
279 spin_unlock_irqrestore(&mdesc_lock, flags);
281 EXPORT_SYMBOL(mdesc_release);
283 static DEFINE_MUTEX(mdesc_mutex);
284 static struct mdesc_notifier_client *client_list;
286 void mdesc_register_notifier(struct mdesc_notifier_client *client)
288 bool supported = false;
292 mutex_lock(&mdesc_mutex);
294 /* check to see if the node is supported for registration */
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) {
303 pr_err("MD: %s node not supported\n", client->node_name);
304 mutex_unlock(&mdesc_mutex);
308 client->next = client_list;
309 client_list = client;
311 mdesc_for_each_node_by_name(cur_mdesc, node, client->node_name)
312 client->add(cur_mdesc, node, client->node_name);
314 mutex_unlock(&mdesc_mutex);
317 static const u64 *parent_cfg_handle(struct mdesc_handle *hp, u64 node)
323 mdesc_for_each_arc(a, hp, node, MDESC_ARC_TYPE_BACK) {
326 target = mdesc_arc_target(hp, a);
327 id = mdesc_get_property(hp, target,
336 static int get_vdev_port_node_info(struct mdesc_handle *md, u64 node,
337 union md_node_info *node_info)
339 const u64 *parent_cfg_hdlp;
344 * Virtual device nodes are distinguished by:
347 * 3. parent node "cfg-handle" property
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);
353 if (!idp || !name || !parent_cfg_hdlp)
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;
363 static void rel_vdev_port_node_info(union md_node_info *node_info)
365 if (node_info && node_info->vdev_port.name) {
366 kfree_const(node_info->vdev_port.name);
367 node_info->vdev_port.name = NULL;
371 static bool vdev_port_node_match(union md_node_info *a_node_info,
372 union md_node_info *b_node_info)
374 if (a_node_info->vdev_port.id != b_node_info->vdev_port.id)
377 if (a_node_info->vdev_port.parent_cfg_hdl !=
378 b_node_info->vdev_port.parent_cfg_hdl)
381 if (strncmp(a_node_info->vdev_port.name,
382 b_node_info->vdev_port.name, MDESC_MAX_STR_LEN) != 0)
388 static int get_ds_port_node_info(struct mdesc_handle *md, u64 node,
389 union md_node_info *node_info)
393 /* DS port nodes use the "id" property to distinguish them */
394 idp = mdesc_get_property(md, node, "id", NULL);
398 node_info->ds_port.id = *idp;
403 static void rel_ds_port_node_info(union md_node_info *node_info)
407 static bool ds_port_node_match(union md_node_info *a_node_info,
408 union md_node_info *b_node_info)
410 if (a_node_info->ds_port.id != b_node_info->ds_port.id)
416 /* Run 'func' on nodes which are in A but not in B. */
417 static 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))
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;
434 * Find the get_info, rel_info and node_match ops for the given
437 mdesc_get_node_ops(name, &get_info_func, &rel_info_func,
440 /* If we didn't find a match, the node type is not supported */
441 if (!get_info_func || !rel_info_func || !node_match_func) {
442 pr_err("MD: %s node type is not supported\n", name);
446 mdesc_for_each_node_by_name(a, a_node, name) {
449 rv = get_info_func(a, a_node, &a_node_info);
451 pr_err("MD: Cannot find 1 or more required match properties for %s node.\n",
456 /* Check each node in B for node matching a_node */
457 mdesc_for_each_node_by_name(b, b_node, name) {
458 rv = get_info_func(b, b_node, &b_node_info);
462 if (node_match_func(&a_node_info, &b_node_info)) {
464 rel_info_func(&b_node_info);
468 rel_info_func(&b_node_info);
471 rel_info_func(&a_node_info);
474 func(a, a_node, name);
478 static void notify_one(struct mdesc_notifier_client *p,
479 struct mdesc_handle *old_hp,
480 struct mdesc_handle *new_hp)
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);
486 static void mdesc_notify_clients(struct mdesc_handle *old_hp,
487 struct mdesc_handle *new_hp)
489 struct mdesc_notifier_client *p = client_list;
492 notify_one(p, old_hp, new_hp);
497 void mdesc_update(void)
499 unsigned long len, real_len, status;
500 struct mdesc_handle *hp, *orig_hp;
503 mutex_lock(&mdesc_mutex);
505 (void) sun4v_mach_desc(0UL, 0UL, &len);
507 hp = mdesc_alloc(len, &kmalloc_mdesc_memops);
509 printk(KERN_ERR "MD: mdesc alloc fails\n");
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",
517 refcount_dec(&hp->refcnt);
522 spin_lock_irqsave(&mdesc_lock, flags);
525 spin_unlock_irqrestore(&mdesc_lock, flags);
527 mdesc_notify_clients(orig_hp, hp);
529 spin_lock_irqsave(&mdesc_lock, flags);
530 if (refcount_dec_and_test(&orig_hp->refcnt))
533 list_add(&orig_hp->list, &mdesc_zombie_list);
534 spin_unlock_irqrestore(&mdesc_lock, flags);
537 mutex_unlock(&mdesc_mutex);
540 u64 mdesc_get_node(struct mdesc_handle *hp, const char *node_name,
541 union md_node_info *node_info)
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;
550 if (hp == NULL || node_name == NULL || node_info == NULL)
551 return MDESC_NODE_NULL;
553 /* Find the ops for the given node name */
554 mdesc_get_node_ops(node_name, &get_info_func, &rel_info_func,
557 /* If we didn't find ops for the given node name, it is not supported */
558 if (!get_info_func || !rel_info_func || !node_match_func) {
559 pr_err("MD: %s node is not supported\n", node_name);
563 mdesc_for_each_node_by_name(hp, hp_node, node_name) {
564 rv = get_info_func(hp, hp_node, &hp_node_info);
568 if (node_match_func(node_info, &hp_node_info))
571 rel_info_func(&hp_node_info);
574 rel_info_func(&hp_node_info);
578 EXPORT_SYMBOL(mdesc_get_node);
580 int mdesc_get_node_info(struct mdesc_handle *hp, u64 node,
581 const char *node_name, union md_node_info *node_info)
583 mdesc_node_info_get_f get_info_func;
586 if (hp == NULL || node == MDESC_NODE_NULL ||
587 node_name == NULL || node_info == NULL)
590 /* Find the get_info op for the given node name */
591 mdesc_get_node_ops(node_name, &get_info_func, NULL, NULL);
593 /* If we didn't find a get_info_func, the node name is not supported */
594 if (get_info_func == NULL) {
595 pr_err("MD: %s node is not supported\n", node_name);
599 rv = get_info_func(hp, node, node_info);
601 pr_err("MD: Cannot find 1 or more required match properties for %s node.\n",
608 EXPORT_SYMBOL(mdesc_get_node_info);
610 static struct mdesc_elem *node_block(struct mdesc_hdr *mdesc)
612 return (struct mdesc_elem *) (mdesc + 1);
615 static void *name_block(struct mdesc_hdr *mdesc)
617 return ((void *) node_block(mdesc)) + mdesc->node_sz;
620 static void *data_block(struct mdesc_hdr *mdesc)
622 return ((void *) name_block(mdesc)) + mdesc->name_sz;
625 u64 mdesc_node_by_name(struct mdesc_handle *hp,
626 u64 from_node, const char *name)
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;
633 if (from_node == MDESC_NODE_NULL) {
635 } else if (from_node >= last_node) {
636 return MDESC_NODE_NULL;
638 ret = ep[from_node].d.val;
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))
648 if (ret >= last_node)
649 ret = MDESC_NODE_NULL;
652 EXPORT_SYMBOL(mdesc_node_by_name);
654 const void *mdesc_get_property(struct mdesc_handle *hp, u64 node,
655 const char *name, int *lenp)
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;
662 if (node == MDESC_NODE_NULL || node >= last_node)
665 ep = node_block(&hp->mdesc) + node;
667 for (; ep->tag != MD_NODE_END; ep++) {
679 val = data + ep->d.data.data_offset;
680 len = ep->d.data.data_len;
689 if (!strcmp(names + ep->name_offset, name)) {
698 EXPORT_SYMBOL(mdesc_get_property);
700 u64 mdesc_next_arc(struct mdesc_handle *hp, u64 from, const char *arc_type)
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;
706 if (from == MDESC_NODE_NULL || from >= last_node)
707 return MDESC_NODE_NULL;
712 for (; ep->tag != MD_NODE_END; ep++) {
713 if (ep->tag != MD_PROP_ARC)
716 if (strcmp(names + ep->name_offset, arc_type))
722 return MDESC_NODE_NULL;
724 EXPORT_SYMBOL(mdesc_next_arc);
726 u64 mdesc_arc_target(struct mdesc_handle *hp, u64 arc)
728 struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
734 EXPORT_SYMBOL(mdesc_arc_target);
736 const char *mdesc_node_name(struct mdesc_handle *hp, u64 node)
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;
742 if (node == MDESC_NODE_NULL || node >= last_node)
746 if (ep->tag != MD_NODE)
749 return names + ep->name_offset;
751 EXPORT_SYMBOL(mdesc_node_name);
753 static u64 max_cpus = 64;
755 static void __init report_platform_properties(void)
757 struct mdesc_handle *hp = mdesc_grab();
758 u64 pn = mdesc_node_by_name(hp, MDESC_NODE_NULL, "platform");
762 if (pn == MDESC_NODE_NULL) {
763 prom_printf("No platform node in machine-description.\n");
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);
772 v = mdesc_get_property(hp, pn, "hostid", NULL);
774 printk("PLATFORM: hostid [%08llx]\n", *v);
775 v = mdesc_get_property(hp, pn, "serial#", NULL);
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);
782 printk("PLATFORM: mac-address [%llx]\n", *v);
783 v = mdesc_get_property(hp, pn, "watchdog-resolution", NULL);
785 printk("PLATFORM: watchdog-resolution [%llu ms]\n", *v);
786 v = mdesc_get_property(hp, pn, "watchdog-max-timeout", NULL);
788 printk("PLATFORM: watchdog-max-timeout [%llu ms]\n", *v);
789 v = mdesc_get_property(hp, pn, "max-cpus", NULL);
792 printk("PLATFORM: max-cpus [%llu]\n", max_cpus);
801 if (max_cpu > NR_CPUS)
806 for (i = 0; i < max_cpu; i++)
807 set_cpu_possible(i, true);
814 static void fill_in_one_cache(cpuinfo_sparc *c, struct mdesc_handle *hp, u64 mp)
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);
822 type = mdesc_get_property(hp, mp, "type", &type_len);
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;
836 c->ecache_size = *size;
837 c->ecache_line_size = *line_size;
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);
851 if (!strcmp(name, "cache"))
852 fill_in_one_cache(c, hp, target);
857 static void find_back_node_value(struct mdesc_handle *hp, u64 node,
859 void (*func)(struct mdesc_handle *, u64, int),
864 /* Since we have an estimate of recursion depth, do a sanity check. */
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);
872 if (!strcmp(srch_val, name))
875 find_back_node_value(hp, n, srch_val, func, val, depth-1);
879 static void __mark_core_id(struct mdesc_handle *hp, u64 node,
882 const u64 *id = mdesc_get_property(hp, node, "id", NULL);
884 if (*id < num_possible_cpus())
885 cpu_data(*id).core_id = core_id;
888 static void __mark_max_cache_id(struct mdesc_handle *hp, u64 node,
891 const u64 *id = mdesc_get_property(hp, node, "id", NULL);
893 if (*id < num_possible_cpus()) {
894 cpu_data(*id).max_cache_id = max_cache_id;
897 * On systems without explicit socket descriptions socket
900 cpu_data(*id).sock_id = max_cache_id;
904 static void mark_core_ids(struct mdesc_handle *hp, u64 mp,
907 find_back_node_value(hp, mp, "cpu", __mark_core_id, core_id, 10);
910 static void mark_max_cache_ids(struct mdesc_handle *hp, u64 mp,
913 find_back_node_value(hp, mp, "cpu", __mark_max_cache_id,
917 static void set_core_ids(struct mdesc_handle *hp)
924 /* Identify unique cores by looking for cpus backpointed to by
925 * level 1 instruction caches.
927 mdesc_for_each_node_by_name(hp, mp, "cache") {
932 level = mdesc_get_property(hp, mp, "level", NULL);
936 type = mdesc_get_property(hp, mp, "type", &len);
937 if (!of_find_in_proplist(type, "instn", len))
940 mark_core_ids(hp, mp, idx);
945 static int set_max_cache_ids_by_cache(struct mdesc_handle *hp, int level)
952 * Identify unique highest level of shared cache by looking for cpus
953 * backpointed to by shared level N caches.
955 mdesc_for_each_node_by_name(hp, mp, "cache") {
958 cur_lvl = mdesc_get_property(hp, mp, "level", NULL);
959 if (*cur_lvl != level)
961 mark_max_cache_ids(hp, mp, idx);
968 static void set_sock_ids_by_socket(struct mdesc_handle *hp, u64 mp)
972 mdesc_for_each_node_by_name(hp, mp, "socket") {
975 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
976 u64 t = mdesc_arc_target(hp, a);
980 name = mdesc_node_name(hp, t);
981 if (strcmp(name, "cpu"))
984 id = mdesc_get_property(hp, t, "id", NULL);
985 if (*id < num_possible_cpus())
986 cpu_data(*id).sock_id = idx;
992 static void set_sock_ids(struct mdesc_handle *hp)
997 * Find the highest level of shared cache which pre-T7 is also
1000 if (!set_max_cache_ids_by_cache(hp, 3))
1001 set_max_cache_ids_by_cache(hp, 2);
1003 /* If machine description exposes sockets data use it.*/
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);
1009 static void mark_proc_ids(struct mdesc_handle *hp, u64 mp, int proc_id)
1013 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) {
1014 u64 t = mdesc_arc_target(hp, a);
1018 name = mdesc_node_name(hp, t);
1019 if (strcmp(name, "cpu"))
1022 id = mdesc_get_property(hp, t, "id", NULL);
1024 cpu_data(*id).proc_id = proc_id;
1028 static void __set_proc_ids(struct mdesc_handle *hp, const char *exec_unit_name)
1034 mdesc_for_each_node_by_name(hp, mp, exec_unit_name) {
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))
1043 mark_proc_ids(hp, mp, idx);
1048 static void set_proc_ids(struct mdesc_handle *hp)
1050 __set_proc_ids(hp, "exec_unit");
1051 __set_proc_ids(hp, "exec-unit");
1054 static void get_one_mondo_bits(const u64 *p, unsigned int *mask,
1055 unsigned long def, unsigned long max)
1063 if (!val || val >= 64)
1069 *mask = ((1U << val) * 64U) - 1U;
1073 *mask = ((1U << def) * 64U) - 1U;
1076 static void get_mondo_data(struct mdesc_handle *hp, u64 mp,
1077 struct trap_per_cpu *tb)
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));
1085 val = mdesc_get_property(hp, mp, "q-dev-mondo-#bits", NULL);
1086 get_one_mondo_bits(val, &tb->dev_mondo_qmask, 7, 8);
1088 val = mdesc_get_property(hp, mp, "q-resumable-#bits", NULL);
1089 get_one_mondo_bits(val, &tb->resum_qmask, 6, 7);
1091 val = mdesc_get_property(hp, mp, "q-nonresumable-#bits", NULL);
1092 get_one_mondo_bits(val, &tb->nonresum_qmask, 2, 2);
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);
1103 static void *mdesc_iterate_over_cpus(void *(*func)(struct mdesc_handle *, u64, int, void *), void *arg, cpumask_t *mask)
1105 struct mdesc_handle *hp = mdesc_grab();
1109 mdesc_for_each_node_by_name(hp, mp, "cpu") {
1110 const u64 *id = mdesc_get_property(hp, mp, "id", NULL);
1114 if (cpuid >= NR_CPUS) {
1115 printk(KERN_WARNING "Ignoring CPU %d which is "
1116 ">= NR_CPUS (%d)\n",
1120 if (!cpumask_test_cpu(cpuid, mask))
1124 ret = func(hp, mp, cpuid, arg);
1133 static void *record_one_cpu(struct mdesc_handle *hp, u64 mp, int cpuid,
1138 set_cpu_present(cpuid, true);
1143 void mdesc_populate_present_mask(cpumask_t *mask)
1145 if (tlb_type != hypervisor)
1149 mdesc_iterate_over_cpus(record_one_cpu, NULL, mask);
1152 static void * __init check_one_pgsz(struct mdesc_handle *hp, u64 mp, int cpuid, void *arg)
1154 const u64 *pgsz_prop = mdesc_get_property(hp, mp, "mmu-page-size-list", NULL);
1155 unsigned long *pgsz_mask = arg;
1158 val = (HV_PGSZ_MASK_8K | HV_PGSZ_MASK_64K |
1159 HV_PGSZ_MASK_512K | HV_PGSZ_MASK_4MB);
1170 void __init mdesc_get_page_sizes(cpumask_t *mask, unsigned long *pgsz_mask)
1173 mdesc_iterate_over_cpus(check_one_pgsz, pgsz_mask, mask);
1176 static void *fill_in_one_cpu(struct mdesc_handle *hp, u64 mp, int cpuid,
1179 const u64 *cfreq = mdesc_get_property(hp, mp, "clock-frequency", NULL);
1180 struct trap_per_cpu *tb;
1185 /* On uniprocessor we only want the values for the
1186 * real physical cpu the kernel booted onto, however
1187 * cpu_data() only has one entry at index 0.
1189 if (cpuid != real_hard_smp_processor_id())
1194 c = &cpu_data(cpuid);
1195 c->clock_tick = *cfreq;
1197 tb = &trap_block[cpuid];
1198 get_mondo_data(hp, mp, tb);
1200 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
1201 u64 j, t = mdesc_arc_target(hp, a);
1204 t_name = mdesc_node_name(hp, t);
1205 if (!strcmp(t_name, "cache")) {
1206 fill_in_one_cache(c, hp, t);
1210 mdesc_for_each_arc(j, hp, t, MDESC_ARC_TYPE_FWD) {
1211 u64 n = mdesc_arc_target(hp, j);
1214 n_name = mdesc_node_name(hp, n);
1215 if (!strcmp(n_name, "cache"))
1216 fill_in_one_cache(c, hp, n);
1226 void mdesc_fill_in_cpu_data(cpumask_t *mask)
1228 struct mdesc_handle *hp;
1230 mdesc_iterate_over_cpus(fill_in_one_cpu, NULL, mask);
1240 smp_fill_in_sib_core_maps();
1243 /* mdesc_open() - Grab a reference to mdesc_handle when /dev/mdesc is
1244 * opened. Hold this reference until /dev/mdesc is closed to ensure
1245 * mdesc data structure is not released underneath us. Store the
1246 * pointer to mdesc structure in private_data for read and seek to use
1248 static int mdesc_open(struct inode *inode, struct file *file)
1250 struct mdesc_handle *hp = mdesc_grab();
1255 file->private_data = hp;
1260 static ssize_t mdesc_read(struct file *file, char __user *buf,
1261 size_t len, loff_t *offp)
1263 struct mdesc_handle *hp = file->private_data;
1264 unsigned char *mdesc;
1265 int bytes_left, count = len;
1267 if (*offp >= hp->handle_size)
1270 bytes_left = hp->handle_size - *offp;
1271 if (count > bytes_left)
1274 mdesc = (unsigned char *)&hp->mdesc;
1276 if (!copy_to_user(buf, mdesc, count)) {
1284 static loff_t mdesc_llseek(struct file *file, loff_t offset, int whence)
1286 struct mdesc_handle *hp = file->private_data;
1288 return no_seek_end_llseek_size(file, offset, whence, hp->handle_size);
1291 /* mdesc_close() - /dev/mdesc is being closed, release the reference to
1294 static int mdesc_close(struct inode *inode, struct file *file)
1296 mdesc_release(file->private_data);
1300 static const struct file_operations mdesc_fops = {
1303 .llseek = mdesc_llseek,
1304 .release = mdesc_close,
1305 .owner = THIS_MODULE,
1308 static struct miscdevice mdesc_misc = {
1309 .minor = MISC_DYNAMIC_MINOR,
1311 .fops = &mdesc_fops,
1314 static int __init mdesc_misc_init(void)
1316 return misc_register(&mdesc_misc);
1319 __initcall(mdesc_misc_init);
1321 void __init sun4v_mdesc_init(void)
1323 struct mdesc_handle *hp;
1324 unsigned long len, real_len, status;
1326 (void) sun4v_mach_desc(0UL, 0UL, &len);
1328 printk("MDESC: Size is %lu bytes.\n", len);
1330 hp = mdesc_alloc(len, &memblock_mdesc_ops);
1332 prom_printf("MDESC: alloc of %lu bytes failed.\n", len);
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);
1347 report_platform_properties();