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David S. Millereff34142007-06-02 14:41:44 -07001/* sysfs.c: Toplogy sysfs support code for sparc64.
2 *
3 * Copyright (C) 2007 David S. Miller <davem@davemloft.net>
4 */
Alexey Dobriyan8abf9192009-08-13 10:05:43 +00005#include <linux/sched.h>
David S. Millereff34142007-06-02 14:41:44 -07006#include <linux/sysdev.h>
7#include <linux/cpu.h>
8#include <linux/smp.h>
9#include <linux/percpu.h>
10#include <linux/init.h>
11
Sam Ravnborg6e6ab2e2008-12-26 15:33:07 -080012#include <asm/cpudata.h>
David Millerd887ab32007-06-03 23:38:09 -070013#include <asm/hypervisor.h>
14#include <asm/spitfire.h>
David S. Millereff34142007-06-02 14:41:44 -070015
David Millerd887ab32007-06-03 23:38:09 -070016static DEFINE_PER_CPU(struct hv_mmu_statistics, mmu_stats) __attribute__((aligned(64)));
17
18#define SHOW_MMUSTAT_ULONG(NAME) \
Andi Kleen4a0b2b42008-07-01 18:48:41 +020019static ssize_t show_##NAME(struct sys_device *dev, \
20 struct sysdev_attribute *attr, char *buf) \
David S. Millerd1f253e2007-06-02 20:46:36 -070021{ \
David Millerd887ab32007-06-03 23:38:09 -070022 struct hv_mmu_statistics *p = &per_cpu(mmu_stats, dev->id); \
23 return sprintf(buf, "%lu\n", p->NAME); \
24} \
25static SYSDEV_ATTR(NAME, 0444, show_##NAME, NULL)
26
27SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_8k_tte);
28SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_8k_tte);
29SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_64k_tte);
30SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_64k_tte);
31SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_4mb_tte);
32SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_4mb_tte);
33SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_256mb_tte);
34SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_256mb_tte);
35SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_8k_tte);
36SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_8k_tte);
37SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_64k_tte);
38SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_64k_tte);
39SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_4mb_tte);
40SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_4mb_tte);
41SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_256mb_tte);
42SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_256mb_tte);
43SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_8k_tte);
44SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_8k_tte);
45SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_64k_tte);
46SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_64k_tte);
47SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_4mb_tte);
48SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_4mb_tte);
49SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_256mb_tte);
50SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_256mb_tte);
51SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_8k_tte);
52SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_8k_tte);
53SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_64k_tte);
54SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_64k_tte);
55SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_4mb_tte);
56SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_4mb_tte);
57SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_256mb_tte);
58SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_256mb_tte);
59
60static struct attribute *mmu_stat_attrs[] = {
61 &attr_immu_tsb_hits_ctx0_8k_tte.attr,
62 &attr_immu_tsb_ticks_ctx0_8k_tte.attr,
63 &attr_immu_tsb_hits_ctx0_64k_tte.attr,
64 &attr_immu_tsb_ticks_ctx0_64k_tte.attr,
65 &attr_immu_tsb_hits_ctx0_4mb_tte.attr,
66 &attr_immu_tsb_ticks_ctx0_4mb_tte.attr,
67 &attr_immu_tsb_hits_ctx0_256mb_tte.attr,
68 &attr_immu_tsb_ticks_ctx0_256mb_tte.attr,
69 &attr_immu_tsb_hits_ctxnon0_8k_tte.attr,
70 &attr_immu_tsb_ticks_ctxnon0_8k_tte.attr,
71 &attr_immu_tsb_hits_ctxnon0_64k_tte.attr,
72 &attr_immu_tsb_ticks_ctxnon0_64k_tte.attr,
73 &attr_immu_tsb_hits_ctxnon0_4mb_tte.attr,
74 &attr_immu_tsb_ticks_ctxnon0_4mb_tte.attr,
75 &attr_immu_tsb_hits_ctxnon0_256mb_tte.attr,
76 &attr_immu_tsb_ticks_ctxnon0_256mb_tte.attr,
77 &attr_dmmu_tsb_hits_ctx0_8k_tte.attr,
78 &attr_dmmu_tsb_ticks_ctx0_8k_tte.attr,
79 &attr_dmmu_tsb_hits_ctx0_64k_tte.attr,
80 &attr_dmmu_tsb_ticks_ctx0_64k_tte.attr,
81 &attr_dmmu_tsb_hits_ctx0_4mb_tte.attr,
82 &attr_dmmu_tsb_ticks_ctx0_4mb_tte.attr,
83 &attr_dmmu_tsb_hits_ctx0_256mb_tte.attr,
84 &attr_dmmu_tsb_ticks_ctx0_256mb_tte.attr,
85 &attr_dmmu_tsb_hits_ctxnon0_8k_tte.attr,
86 &attr_dmmu_tsb_ticks_ctxnon0_8k_tte.attr,
87 &attr_dmmu_tsb_hits_ctxnon0_64k_tte.attr,
88 &attr_dmmu_tsb_ticks_ctxnon0_64k_tte.attr,
89 &attr_dmmu_tsb_hits_ctxnon0_4mb_tte.attr,
90 &attr_dmmu_tsb_ticks_ctxnon0_4mb_tte.attr,
91 &attr_dmmu_tsb_hits_ctxnon0_256mb_tte.attr,
92 &attr_dmmu_tsb_ticks_ctxnon0_256mb_tte.attr,
93 NULL,
94};
95
96static struct attribute_group mmu_stat_group = {
97 .attrs = mmu_stat_attrs,
98 .name = "mmu_stats",
99};
100
101/* XXX convert to rusty's on_one_cpu */
102static unsigned long run_on_cpu(unsigned long cpu,
103 unsigned long (*func)(unsigned long),
104 unsigned long arg)
105{
106 cpumask_t old_affinity = current->cpus_allowed;
107 unsigned long ret;
108
109 /* should return -EINVAL to userspace */
110 if (set_cpus_allowed(current, cpumask_of_cpu(cpu)))
111 return 0;
112
113 ret = func(arg);
114
115 set_cpus_allowed(current, old_affinity);
116
117 return ret;
118}
119
120static unsigned long read_mmustat_enable(unsigned long junk)
121{
122 unsigned long ra = 0;
123
124 sun4v_mmustat_info(&ra);
125
126 return ra != 0;
127}
128
129static unsigned long write_mmustat_enable(unsigned long val)
130{
131 unsigned long ra, orig_ra;
132
133 if (val)
134 ra = __pa(&per_cpu(mmu_stats, smp_processor_id()));
135 else
136 ra = 0UL;
137
138 return sun4v_mmustat_conf(ra, &orig_ra);
139}
140
Andi Kleen4a0b2b42008-07-01 18:48:41 +0200141static ssize_t show_mmustat_enable(struct sys_device *s,
142 struct sysdev_attribute *attr, char *buf)
David Millerd887ab32007-06-03 23:38:09 -0700143{
144 unsigned long val = run_on_cpu(s->id, read_mmustat_enable, 0);
145 return sprintf(buf, "%lx\n", val);
146}
147
Andi Kleen4a0b2b42008-07-01 18:48:41 +0200148static ssize_t store_mmustat_enable(struct sys_device *s,
149 struct sysdev_attribute *attr, const char *buf,
150 size_t count)
David Millerd887ab32007-06-03 23:38:09 -0700151{
152 unsigned long val, err;
153 int ret = sscanf(buf, "%ld", &val);
154
155 if (ret != 1)
156 return -EINVAL;
157
158 err = run_on_cpu(s->id, write_mmustat_enable, val);
159 if (err)
160 return -EIO;
161
162 return count;
163}
164
165static SYSDEV_ATTR(mmustat_enable, 0644, show_mmustat_enable, store_mmustat_enable);
166
167static int mmu_stats_supported;
168
169static int register_mmu_stats(struct sys_device *s)
170{
171 if (!mmu_stats_supported)
172 return 0;
173 sysdev_create_file(s, &attr_mmustat_enable);
174 return sysfs_create_group(&s->kobj, &mmu_stat_group);
175}
176
177#ifdef CONFIG_HOTPLUG_CPU
178static void unregister_mmu_stats(struct sys_device *s)
179{
180 if (!mmu_stats_supported)
181 return;
182 sysfs_remove_group(&s->kobj, &mmu_stat_group);
183 sysdev_remove_file(s, &attr_mmustat_enable);
184}
185#endif
186
187#define SHOW_CPUDATA_ULONG_NAME(NAME, MEMBER) \
Andi Kleen4a0b2b42008-07-01 18:48:41 +0200188static ssize_t show_##NAME(struct sys_device *dev, \
189 struct sysdev_attribute *attr, char *buf) \
David Millerd887ab32007-06-03 23:38:09 -0700190{ \
191 cpuinfo_sparc *c = &cpu_data(dev->id); \
David S. Millerd1f253e2007-06-02 20:46:36 -0700192 return sprintf(buf, "%lu\n", c->MEMBER); \
193}
194
David Millerd887ab32007-06-03 23:38:09 -0700195#define SHOW_CPUDATA_UINT_NAME(NAME, MEMBER) \
Andi Kleen4a0b2b42008-07-01 18:48:41 +0200196static ssize_t show_##NAME(struct sys_device *dev, \
197 struct sysdev_attribute *attr, char *buf) \
David S. Millerd1f253e2007-06-02 20:46:36 -0700198{ \
David Millerd887ab32007-06-03 23:38:09 -0700199 cpuinfo_sparc *c = &cpu_data(dev->id); \
David S. Millerd1f253e2007-06-02 20:46:36 -0700200 return sprintf(buf, "%u\n", c->MEMBER); \
201}
202
David Millerd887ab32007-06-03 23:38:09 -0700203SHOW_CPUDATA_ULONG_NAME(clock_tick, clock_tick);
David Millerd887ab32007-06-03 23:38:09 -0700204SHOW_CPUDATA_UINT_NAME(l1_dcache_size, dcache_size);
205SHOW_CPUDATA_UINT_NAME(l1_dcache_line_size, dcache_line_size);
206SHOW_CPUDATA_UINT_NAME(l1_icache_size, icache_size);
207SHOW_CPUDATA_UINT_NAME(l1_icache_line_size, icache_line_size);
208SHOW_CPUDATA_UINT_NAME(l2_cache_size, ecache_size);
209SHOW_CPUDATA_UINT_NAME(l2_cache_line_size, ecache_line_size);
David S. Millerd1f253e2007-06-02 20:46:36 -0700210
211static struct sysdev_attribute cpu_core_attrs[] = {
212 _SYSDEV_ATTR(clock_tick, 0444, show_clock_tick, NULL),
David S. Millerd1f253e2007-06-02 20:46:36 -0700213 _SYSDEV_ATTR(l1_dcache_size, 0444, show_l1_dcache_size, NULL),
214 _SYSDEV_ATTR(l1_dcache_line_size, 0444, show_l1_dcache_line_size, NULL),
215 _SYSDEV_ATTR(l1_icache_size, 0444, show_l1_icache_size, NULL),
216 _SYSDEV_ATTR(l1_icache_line_size, 0444, show_l1_icache_line_size, NULL),
217 _SYSDEV_ATTR(l2_cache_size, 0444, show_l2_cache_size, NULL),
218 _SYSDEV_ATTR(l2_cache_line_size, 0444, show_l2_cache_line_size, NULL),
219};
220
David Millerd887ab32007-06-03 23:38:09 -0700221static DEFINE_PER_CPU(struct cpu, cpu_devices);
222
David S. Millerd1f253e2007-06-02 20:46:36 -0700223static void register_cpu_online(unsigned int cpu)
224{
225 struct cpu *c = &per_cpu(cpu_devices, cpu);
226 struct sys_device *s = &c->sysdev;
227 int i;
228
229 for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++)
230 sysdev_create_file(s, &cpu_core_attrs[i]);
David Millerd887ab32007-06-03 23:38:09 -0700231
232 register_mmu_stats(s);
David S. Millerd1f253e2007-06-02 20:46:36 -0700233}
234
235#ifdef CONFIG_HOTPLUG_CPU
236static void unregister_cpu_online(unsigned int cpu)
237{
238 struct cpu *c = &per_cpu(cpu_devices, cpu);
239 struct sys_device *s = &c->sysdev;
240 int i;
241
David Millerd887ab32007-06-03 23:38:09 -0700242 unregister_mmu_stats(s);
David S. Millerd1f253e2007-06-02 20:46:36 -0700243 for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++)
244 sysdev_remove_file(s, &cpu_core_attrs[i]);
245}
246#endif
247
248static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
249 unsigned long action, void *hcpu)
250{
251 unsigned int cpu = (unsigned int)(long)hcpu;
252
253 switch (action) {
254 case CPU_ONLINE:
255 case CPU_ONLINE_FROZEN:
256 register_cpu_online(cpu);
257 break;
258#ifdef CONFIG_HOTPLUG_CPU
259 case CPU_DEAD:
260 case CPU_DEAD_FROZEN:
261 unregister_cpu_online(cpu);
262 break;
263#endif
264 }
265 return NOTIFY_OK;
266}
267
268static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
269 .notifier_call = sysfs_cpu_notify,
270};
271
David Millerd887ab32007-06-03 23:38:09 -0700272static void __init check_mmu_stats(void)
273{
274 unsigned long dummy1, err;
275
276 if (tlb_type != hypervisor)
277 return;
278
279 err = sun4v_mmustat_info(&dummy1);
280 if (!err)
281 mmu_stats_supported = 1;
282}
283
David S. Miller919ee672008-04-23 05:40:25 -0700284static void register_nodes(void)
285{
286#ifdef CONFIG_NUMA
287 int i;
288
289 for (i = 0; i < MAX_NUMNODES; i++)
290 register_one_node(i);
291#endif
292}
293
David S. Millereff34142007-06-02 14:41:44 -0700294static int __init topology_init(void)
295{
296 int cpu;
297
David S. Miller919ee672008-04-23 05:40:25 -0700298 register_nodes();
299
David Millerd887ab32007-06-03 23:38:09 -0700300 check_mmu_stats();
301
David S. Millerd1f253e2007-06-02 20:46:36 -0700302 register_cpu_notifier(&sysfs_cpu_nb);
303
David S. Millereff34142007-06-02 14:41:44 -0700304 for_each_possible_cpu(cpu) {
305 struct cpu *c = &per_cpu(cpu_devices, cpu);
306
307 register_cpu(c, cpu);
David S. Millerd1f253e2007-06-02 20:46:36 -0700308 if (cpu_online(cpu))
309 register_cpu_online(cpu);
David S. Millereff34142007-06-02 14:41:44 -0700310 }
311
312 return 0;
313}
314
315subsys_initcall(topology_init);