Commit | Line | Data |
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1da177e4 LT |
1 | #include <linux/sysdev.h> |
2 | #include <linux/cpu.h> | |
3 | #include <linux/smp.h> | |
4 | #include <linux/percpu.h> | |
5 | #include <linux/init.h> | |
6 | #include <linux/sched.h> | |
7 | #include <linux/module.h> | |
8 | #include <linux/nodemask.h> | |
9 | #include <linux/cpumask.h> | |
10 | #include <linux/notifier.h> | |
11 | ||
12 | #include <asm/current.h> | |
13 | #include <asm/processor.h> | |
14 | #include <asm/cputable.h> | |
1ababe11 | 15 | #include <asm/firmware.h> |
1da177e4 LT |
16 | #include <asm/hvcall.h> |
17 | #include <asm/prom.h> | |
1da177e4 | 18 | #include <asm/machdep.h> |
2249ca9d | 19 | #include <asm/smp.h> |
1da177e4 | 20 | |
b950bdd0 BH |
21 | #ifdef CONFIG_PPC64 |
22 | #include <asm/paca.h> | |
23 | #include <asm/lppaca.h> | |
24 | #endif | |
25 | ||
1da177e4 LT |
26 | static DEFINE_PER_CPU(struct cpu, cpu_devices); |
27 | ||
124c27d3 NL |
28 | static DEFINE_PER_CPU(struct kobject *, cache_toplevel); |
29 | ||
b950bdd0 BH |
30 | /* |
31 | * SMT snooze delay stuff, 64-bit only for now | |
32 | */ | |
33 | ||
34 | #ifdef CONFIG_PPC64 | |
1da177e4 | 35 | |
0ddd3e7d AB |
36 | /* Time in microseconds we delay before sleeping in the idle loop */ |
37 | DEFINE_PER_CPU(unsigned long, smt_snooze_delay) = { 100 }; | |
1da177e4 | 38 | |
4a0b2b4d AK |
39 | static ssize_t store_smt_snooze_delay(struct sys_device *dev, |
40 | struct sysdev_attribute *attr, | |
41 | const char *buf, | |
1da177e4 LT |
42 | size_t count) |
43 | { | |
44 | struct cpu *cpu = container_of(dev, struct cpu, sysdev); | |
45 | ssize_t ret; | |
46 | unsigned long snooze; | |
47 | ||
48 | ret = sscanf(buf, "%lu", &snooze); | |
49 | if (ret != 1) | |
50 | return -EINVAL; | |
51 | ||
52 | per_cpu(smt_snooze_delay, cpu->sysdev.id) = snooze; | |
53 | ||
54 | return count; | |
55 | } | |
56 | ||
4a0b2b4d AK |
57 | static ssize_t show_smt_snooze_delay(struct sys_device *dev, |
58 | struct sysdev_attribute *attr, | |
59 | char *buf) | |
1da177e4 LT |
60 | { |
61 | struct cpu *cpu = container_of(dev, struct cpu, sysdev); | |
62 | ||
63 | return sprintf(buf, "%lu\n", per_cpu(smt_snooze_delay, cpu->sysdev.id)); | |
64 | } | |
65 | ||
66 | static SYSDEV_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay, | |
67 | store_smt_snooze_delay); | |
68 | ||
69 | /* Only parse OF options if the matching cmdline option was not specified */ | |
70 | static int smt_snooze_cmdline; | |
71 | ||
72 | static int __init smt_setup(void) | |
73 | { | |
74 | struct device_node *options; | |
a7f67bdf | 75 | const unsigned int *val; |
1da177e4 LT |
76 | unsigned int cpu; |
77 | ||
78 | if (!cpu_has_feature(CPU_FTR_SMT)) | |
69ed3324 | 79 | return -ENODEV; |
1da177e4 | 80 | |
8c8dc322 | 81 | options = of_find_node_by_path("/options"); |
1da177e4 | 82 | if (!options) |
69ed3324 | 83 | return -ENODEV; |
1da177e4 | 84 | |
e2eb6392 | 85 | val = of_get_property(options, "ibm,smt-snooze-delay", NULL); |
1da177e4 | 86 | if (!smt_snooze_cmdline && val) { |
0e551954 | 87 | for_each_possible_cpu(cpu) |
1da177e4 LT |
88 | per_cpu(smt_snooze_delay, cpu) = *val; |
89 | } | |
90 | ||
8c8dc322 | 91 | of_node_put(options); |
69ed3324 | 92 | return 0; |
1da177e4 LT |
93 | } |
94 | __initcall(smt_setup); | |
95 | ||
96 | static int __init setup_smt_snooze_delay(char *str) | |
97 | { | |
98 | unsigned int cpu; | |
99 | int snooze; | |
100 | ||
101 | if (!cpu_has_feature(CPU_FTR_SMT)) | |
102 | return 1; | |
103 | ||
104 | smt_snooze_cmdline = 1; | |
105 | ||
106 | if (get_option(&str, &snooze)) { | |
0e551954 | 107 | for_each_possible_cpu(cpu) |
1da177e4 LT |
108 | per_cpu(smt_snooze_delay, cpu) = snooze; |
109 | } | |
110 | ||
111 | return 1; | |
112 | } | |
113 | __setup("smt-snooze-delay=", setup_smt_snooze_delay); | |
114 | ||
b950bdd0 | 115 | #endif /* CONFIG_PPC64 */ |
180a3362 | 116 | |
1da177e4 LT |
117 | /* |
118 | * Enabling PMCs will slow partition context switch times so we only do | |
119 | * it the first time we write to the PMCs. | |
120 | */ | |
121 | ||
122 | static DEFINE_PER_CPU(char, pmcs_enabled); | |
123 | ||
b950bdd0 | 124 | void ppc_enable_pmcs(void) |
1da177e4 | 125 | { |
1da177e4 LT |
126 | /* Only need to enable them once */ |
127 | if (__get_cpu_var(pmcs_enabled)) | |
128 | return; | |
129 | ||
130 | __get_cpu_var(pmcs_enabled) = 1; | |
131 | ||
180a3362 ME |
132 | if (ppc_md.enable_pmcs) |
133 | ppc_md.enable_pmcs(); | |
1da177e4 | 134 | } |
b950bdd0 | 135 | EXPORT_SYMBOL(ppc_enable_pmcs); |
1da177e4 LT |
136 | |
137 | /* XXX convert to rusty's on_one_cpu */ | |
138 | static unsigned long run_on_cpu(unsigned long cpu, | |
139 | unsigned long (*func)(unsigned long), | |
140 | unsigned long arg) | |
141 | { | |
142 | cpumask_t old_affinity = current->cpus_allowed; | |
143 | unsigned long ret; | |
144 | ||
145 | /* should return -EINVAL to userspace */ | |
146 | if (set_cpus_allowed(current, cpumask_of_cpu(cpu))) | |
147 | return 0; | |
148 | ||
149 | ret = func(arg); | |
150 | ||
151 | set_cpus_allowed(current, old_affinity); | |
152 | ||
153 | return ret; | |
154 | } | |
155 | ||
156 | #define SYSFS_PMCSETUP(NAME, ADDRESS) \ | |
157 | static unsigned long read_##NAME(unsigned long junk) \ | |
158 | { \ | |
159 | return mfspr(ADDRESS); \ | |
160 | } \ | |
161 | static unsigned long write_##NAME(unsigned long val) \ | |
162 | { \ | |
b950bdd0 | 163 | ppc_enable_pmcs(); \ |
1da177e4 LT |
164 | mtspr(ADDRESS, val); \ |
165 | return 0; \ | |
166 | } \ | |
4a0b2b4d AK |
167 | static ssize_t show_##NAME(struct sys_device *dev, \ |
168 | struct sysdev_attribute *attr, \ | |
169 | char *buf) \ | |
1da177e4 LT |
170 | { \ |
171 | struct cpu *cpu = container_of(dev, struct cpu, sysdev); \ | |
172 | unsigned long val = run_on_cpu(cpu->sysdev.id, read_##NAME, 0); \ | |
173 | return sprintf(buf, "%lx\n", val); \ | |
174 | } \ | |
3ff6eecc | 175 | static ssize_t __used \ |
4a0b2b4d AK |
176 | store_##NAME(struct sys_device *dev, struct sysdev_attribute *attr, \ |
177 | const char *buf, size_t count) \ | |
1da177e4 LT |
178 | { \ |
179 | struct cpu *cpu = container_of(dev, struct cpu, sysdev); \ | |
180 | unsigned long val; \ | |
181 | int ret = sscanf(buf, "%lx", &val); \ | |
182 | if (ret != 1) \ | |
183 | return -EINVAL; \ | |
184 | run_on_cpu(cpu->sysdev.id, write_##NAME, val); \ | |
185 | return count; \ | |
186 | } | |
187 | ||
6529c13d OJ |
188 | |
189 | /* Let's define all possible registers, we'll only hook up the ones | |
190 | * that are implemented on the current processor | |
191 | */ | |
192 | ||
b950bdd0 BH |
193 | #ifdef CONFIG_PPC64 |
194 | #define HAS_PPC_PMC_CLASSIC 1 | |
195 | #define HAS_PPC_PMC_IBM 1 | |
196 | #define HAS_PPC_PMC_PA6T 1 | |
197 | #elif CONFIG_6xx | |
198 | #define HAS_PPC_PMC_CLASSIC 1 | |
199 | #define HAS_PPC_PMC_IBM 1 | |
200 | #define HAS_PPC_PMC_G4 1 | |
201 | #endif | |
202 | ||
203 | ||
204 | #ifdef HAS_PPC_PMC_CLASSIC | |
1da177e4 LT |
205 | SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0); |
206 | SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1); | |
1da177e4 LT |
207 | SYSFS_PMCSETUP(pmc1, SPRN_PMC1); |
208 | SYSFS_PMCSETUP(pmc2, SPRN_PMC2); | |
209 | SYSFS_PMCSETUP(pmc3, SPRN_PMC3); | |
210 | SYSFS_PMCSETUP(pmc4, SPRN_PMC4); | |
211 | SYSFS_PMCSETUP(pmc5, SPRN_PMC5); | |
212 | SYSFS_PMCSETUP(pmc6, SPRN_PMC6); | |
b950bdd0 BH |
213 | |
214 | #ifdef HAS_PPC_PMC_G4 | |
215 | SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2); | |
216 | #endif | |
217 | ||
218 | #ifdef CONFIG_PPC64 | |
1da177e4 LT |
219 | SYSFS_PMCSETUP(pmc7, SPRN_PMC7); |
220 | SYSFS_PMCSETUP(pmc8, SPRN_PMC8); | |
b950bdd0 BH |
221 | |
222 | SYSFS_PMCSETUP(mmcra, SPRN_MMCRA); | |
1da177e4 | 223 | SYSFS_PMCSETUP(purr, SPRN_PURR); |
f050982a | 224 | SYSFS_PMCSETUP(spurr, SPRN_SPURR); |
4c198557 | 225 | SYSFS_PMCSETUP(dscr, SPRN_DSCR); |
1da177e4 | 226 | |
b950bdd0 BH |
227 | static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra); |
228 | static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL); | |
229 | static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr); | |
230 | static SYSDEV_ATTR(purr, 0600, show_purr, store_purr); | |
231 | #endif /* CONFIG_PPC64 */ | |
232 | ||
233 | #ifdef HAS_PPC_PMC_PA6T | |
25fc530e OJ |
234 | SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0); |
235 | SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1); | |
236 | SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2); | |
237 | SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3); | |
238 | SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4); | |
239 | SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5); | |
2e1957fd OJ |
240 | #ifdef CONFIG_DEBUG_KERNEL |
241 | SYSFS_PMCSETUP(hid0, SPRN_HID0); | |
242 | SYSFS_PMCSETUP(hid1, SPRN_HID1); | |
243 | SYSFS_PMCSETUP(hid4, SPRN_HID4); | |
244 | SYSFS_PMCSETUP(hid5, SPRN_HID5); | |
245 | SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0); | |
246 | SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1); | |
247 | SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2); | |
248 | SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3); | |
249 | SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4); | |
250 | SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5); | |
251 | SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6); | |
252 | SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7); | |
253 | SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8); | |
254 | SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9); | |
255 | SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT); | |
256 | SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR); | |
257 | SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR); | |
258 | SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR); | |
259 | SYSFS_PMCSETUP(der, SPRN_PA6T_DER); | |
260 | SYSFS_PMCSETUP(mer, SPRN_PA6T_MER); | |
261 | SYSFS_PMCSETUP(ber, SPRN_PA6T_BER); | |
262 | SYSFS_PMCSETUP(ier, SPRN_PA6T_IER); | |
263 | SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER); | |
264 | SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR); | |
265 | SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0); | |
266 | SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1); | |
267 | SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2); | |
268 | SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3); | |
269 | #endif /* CONFIG_DEBUG_KERNEL */ | |
b950bdd0 | 270 | #endif /* HAS_PPC_PMC_PA6T */ |
6529c13d | 271 | |
b950bdd0 | 272 | #ifdef HAS_PPC_PMC_IBM |
6529c13d OJ |
273 | static struct sysdev_attribute ibm_common_attrs[] = { |
274 | _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), | |
275 | _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), | |
276 | }; | |
b950bdd0 BH |
277 | #endif /* HAS_PPC_PMC_G4 */ |
278 | ||
279 | #ifdef HAS_PPC_PMC_G4 | |
280 | static struct sysdev_attribute g4_common_attrs[] = { | |
281 | _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), | |
282 | _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), | |
283 | _SYSDEV_ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2), | |
284 | }; | |
285 | #endif /* HAS_PPC_PMC_G4 */ | |
6529c13d | 286 | |
b950bdd0 | 287 | static struct sysdev_attribute classic_pmc_attrs[] = { |
6529c13d OJ |
288 | _SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1), |
289 | _SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2), | |
290 | _SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3), | |
291 | _SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4), | |
292 | _SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5), | |
293 | _SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6), | |
b950bdd0 | 294 | #ifdef CONFIG_PPC64 |
6529c13d OJ |
295 | _SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7), |
296 | _SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8), | |
b950bdd0 | 297 | #endif |
6529c13d OJ |
298 | }; |
299 | ||
b950bdd0 | 300 | #ifdef HAS_PPC_PMC_PA6T |
6529c13d OJ |
301 | static struct sysdev_attribute pa6t_attrs[] = { |
302 | _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), | |
303 | _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), | |
304 | _SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0), | |
305 | _SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1), | |
306 | _SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2), | |
307 | _SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3), | |
308 | _SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4), | |
309 | _SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5), | |
2e1957fd OJ |
310 | #ifdef CONFIG_DEBUG_KERNEL |
311 | _SYSDEV_ATTR(hid0, 0600, show_hid0, store_hid0), | |
312 | _SYSDEV_ATTR(hid1, 0600, show_hid1, store_hid1), | |
313 | _SYSDEV_ATTR(hid4, 0600, show_hid4, store_hid4), | |
314 | _SYSDEV_ATTR(hid5, 0600, show_hid5, store_hid5), | |
315 | _SYSDEV_ATTR(ima0, 0600, show_ima0, store_ima0), | |
316 | _SYSDEV_ATTR(ima1, 0600, show_ima1, store_ima1), | |
317 | _SYSDEV_ATTR(ima2, 0600, show_ima2, store_ima2), | |
318 | _SYSDEV_ATTR(ima3, 0600, show_ima3, store_ima3), | |
319 | _SYSDEV_ATTR(ima4, 0600, show_ima4, store_ima4), | |
320 | _SYSDEV_ATTR(ima5, 0600, show_ima5, store_ima5), | |
321 | _SYSDEV_ATTR(ima6, 0600, show_ima6, store_ima6), | |
322 | _SYSDEV_ATTR(ima7, 0600, show_ima7, store_ima7), | |
323 | _SYSDEV_ATTR(ima8, 0600, show_ima8, store_ima8), | |
324 | _SYSDEV_ATTR(ima9, 0600, show_ima9, store_ima9), | |
325 | _SYSDEV_ATTR(imaat, 0600, show_imaat, store_imaat), | |
326 | _SYSDEV_ATTR(btcr, 0600, show_btcr, store_btcr), | |
327 | _SYSDEV_ATTR(pccr, 0600, show_pccr, store_pccr), | |
328 | _SYSDEV_ATTR(rpccr, 0600, show_rpccr, store_rpccr), | |
329 | _SYSDEV_ATTR(der, 0600, show_der, store_der), | |
330 | _SYSDEV_ATTR(mer, 0600, show_mer, store_mer), | |
331 | _SYSDEV_ATTR(ber, 0600, show_ber, store_ber), | |
332 | _SYSDEV_ATTR(ier, 0600, show_ier, store_ier), | |
333 | _SYSDEV_ATTR(sier, 0600, show_sier, store_sier), | |
334 | _SYSDEV_ATTR(siar, 0600, show_siar, store_siar), | |
335 | _SYSDEV_ATTR(tsr0, 0600, show_tsr0, store_tsr0), | |
336 | _SYSDEV_ATTR(tsr1, 0600, show_tsr1, store_tsr1), | |
337 | _SYSDEV_ATTR(tsr2, 0600, show_tsr2, store_tsr2), | |
338 | _SYSDEV_ATTR(tsr3, 0600, show_tsr3, store_tsr3), | |
339 | #endif /* CONFIG_DEBUG_KERNEL */ | |
6529c13d | 340 | }; |
b950bdd0 BH |
341 | #endif /* HAS_PPC_PMC_PA6T */ |
342 | #endif /* HAS_PPC_PMC_CLASSIC */ | |
6529c13d | 343 | |
124c27d3 NL |
344 | struct cache_desc { |
345 | struct kobject kobj; | |
346 | struct cache_desc *next; | |
347 | const char *type; /* Instruction, Data, or Unified */ | |
348 | u32 size; /* total cache size in KB */ | |
349 | u32 line_size; /* in bytes */ | |
350 | u32 nr_sets; /* number of sets */ | |
351 | u32 level; /* e.g. 1, 2, 3... */ | |
352 | u32 associativity; /* e.g. 8-way... 0 is fully associative */ | |
353 | }; | |
354 | ||
355 | DEFINE_PER_CPU(struct cache_desc *, cache_desc); | |
356 | ||
357 | static struct cache_desc *kobj_to_cache_desc(struct kobject *k) | |
358 | { | |
359 | return container_of(k, struct cache_desc, kobj); | |
360 | } | |
361 | ||
362 | static void cache_desc_release(struct kobject *k) | |
363 | { | |
364 | struct cache_desc *desc = kobj_to_cache_desc(k); | |
365 | ||
366 | pr_debug("%s: releasing %s\n", __func__, kobject_name(k)); | |
367 | ||
368 | if (desc->next) | |
369 | kobject_put(&desc->next->kobj); | |
370 | ||
371 | kfree(kobj_to_cache_desc(k)); | |
372 | } | |
373 | ||
374 | static ssize_t cache_desc_show(struct kobject *k, struct attribute *attr, char *buf) | |
375 | { | |
376 | struct kobj_attribute *kobj_attr; | |
377 | ||
378 | kobj_attr = container_of(attr, struct kobj_attribute, attr); | |
379 | ||
380 | return kobj_attr->show(k, kobj_attr, buf); | |
381 | } | |
382 | ||
383 | static struct sysfs_ops cache_desc_sysfs_ops = { | |
384 | .show = cache_desc_show, | |
385 | }; | |
386 | ||
387 | static struct kobj_type cache_desc_type = { | |
388 | .release = cache_desc_release, | |
389 | .sysfs_ops = &cache_desc_sysfs_ops, | |
390 | }; | |
391 | ||
392 | static ssize_t cache_size_show(struct kobject *k, struct kobj_attribute *attr, char *buf) | |
393 | { | |
394 | struct cache_desc *cache = kobj_to_cache_desc(k); | |
395 | ||
396 | return sprintf(buf, "%uK\n", cache->size); | |
397 | } | |
398 | ||
399 | static struct kobj_attribute cache_size_attr = | |
400 | __ATTR(size, 0444, cache_size_show, NULL); | |
401 | ||
402 | static ssize_t cache_line_size_show(struct kobject *k, struct kobj_attribute *attr, char *buf) | |
403 | { | |
404 | struct cache_desc *cache = kobj_to_cache_desc(k); | |
405 | ||
406 | return sprintf(buf, "%u\n", cache->line_size); | |
407 | } | |
408 | ||
409 | static struct kobj_attribute cache_line_size_attr = | |
410 | __ATTR(coherency_line_size, 0444, cache_line_size_show, NULL); | |
411 | ||
412 | static ssize_t cache_nr_sets_show(struct kobject *k, struct kobj_attribute *attr, char *buf) | |
413 | { | |
414 | struct cache_desc *cache = kobj_to_cache_desc(k); | |
415 | ||
416 | return sprintf(buf, "%u\n", cache->nr_sets); | |
417 | } | |
418 | ||
419 | static struct kobj_attribute cache_nr_sets_attr = | |
420 | __ATTR(number_of_sets, 0444, cache_nr_sets_show, NULL); | |
421 | ||
422 | static ssize_t cache_type_show(struct kobject *k, struct kobj_attribute *attr, char *buf) | |
423 | { | |
424 | struct cache_desc *cache = kobj_to_cache_desc(k); | |
425 | ||
426 | return sprintf(buf, "%s\n", cache->type); | |
427 | } | |
428 | ||
429 | static struct kobj_attribute cache_type_attr = | |
430 | __ATTR(type, 0444, cache_type_show, NULL); | |
431 | ||
432 | static ssize_t cache_level_show(struct kobject *k, struct kobj_attribute *attr, char *buf) | |
433 | { | |
434 | struct cache_desc *cache = kobj_to_cache_desc(k); | |
435 | ||
436 | return sprintf(buf, "%u\n", cache->level); | |
437 | } | |
438 | ||
439 | static struct kobj_attribute cache_level_attr = | |
440 | __ATTR(level, 0444, cache_level_show, NULL); | |
441 | ||
442 | static ssize_t cache_assoc_show(struct kobject *k, struct kobj_attribute *attr, char *buf) | |
443 | { | |
444 | struct cache_desc *cache = kobj_to_cache_desc(k); | |
445 | ||
446 | return sprintf(buf, "%u\n", cache->associativity); | |
447 | } | |
448 | ||
449 | static struct kobj_attribute cache_assoc_attr = | |
450 | __ATTR(ways_of_associativity, 0444, cache_assoc_show, NULL); | |
451 | ||
452 | struct cache_desc_info { | |
453 | const char *type; | |
454 | const char *size_prop; | |
455 | const char *line_size_prop; | |
456 | const char *nr_sets_prop; | |
457 | }; | |
458 | ||
459 | /* PowerPC Processor binding says the [di]-cache-* must be equal on | |
460 | * unified caches, so just use d-cache properties. */ | |
461 | static struct cache_desc_info ucache_info = { | |
462 | .type = "Unified", | |
463 | .size_prop = "d-cache-size", | |
464 | .line_size_prop = "d-cache-line-size", | |
465 | .nr_sets_prop = "d-cache-sets", | |
466 | }; | |
467 | ||
468 | static struct cache_desc_info dcache_info = { | |
469 | .type = "Data", | |
470 | .size_prop = "d-cache-size", | |
471 | .line_size_prop = "d-cache-line-size", | |
472 | .nr_sets_prop = "d-cache-sets", | |
473 | }; | |
474 | ||
475 | static struct cache_desc_info icache_info = { | |
476 | .type = "Instruction", | |
477 | .size_prop = "i-cache-size", | |
478 | .line_size_prop = "i-cache-line-size", | |
479 | .nr_sets_prop = "i-cache-sets", | |
480 | }; | |
481 | ||
482 | static struct cache_desc * __cpuinit create_cache_desc(struct device_node *np, struct kobject *parent, int index, int level, struct cache_desc_info *info) | |
483 | { | |
484 | const u32 *cache_line_size; | |
485 | struct cache_desc *new; | |
486 | const u32 *cache_size; | |
487 | const u32 *nr_sets; | |
488 | int rc; | |
489 | ||
490 | new = kzalloc(sizeof(*new), GFP_KERNEL); | |
491 | if (!new) | |
492 | return NULL; | |
493 | ||
494 | rc = kobject_init_and_add(&new->kobj, &cache_desc_type, parent, | |
495 | "index%d", index); | |
496 | if (rc) | |
497 | goto err; | |
498 | ||
499 | /* type */ | |
500 | new->type = info->type; | |
501 | rc = sysfs_create_file(&new->kobj, &cache_type_attr.attr); | |
502 | WARN_ON(rc); | |
503 | ||
504 | /* level */ | |
505 | new->level = level; | |
506 | rc = sysfs_create_file(&new->kobj, &cache_level_attr.attr); | |
507 | WARN_ON(rc); | |
508 | ||
509 | /* size */ | |
510 | cache_size = of_get_property(np, info->size_prop, NULL); | |
511 | if (cache_size) { | |
512 | new->size = *cache_size / 1024; | |
513 | rc = sysfs_create_file(&new->kobj, | |
514 | &cache_size_attr.attr); | |
515 | WARN_ON(rc); | |
516 | } | |
517 | ||
518 | /* coherency_line_size */ | |
519 | cache_line_size = of_get_property(np, info->line_size_prop, NULL); | |
520 | if (cache_line_size) { | |
521 | new->line_size = *cache_line_size; | |
522 | rc = sysfs_create_file(&new->kobj, | |
523 | &cache_line_size_attr.attr); | |
524 | WARN_ON(rc); | |
525 | } | |
526 | ||
527 | /* number_of_sets */ | |
528 | nr_sets = of_get_property(np, info->nr_sets_prop, NULL); | |
529 | if (nr_sets) { | |
530 | new->nr_sets = *nr_sets; | |
531 | rc = sysfs_create_file(&new->kobj, | |
532 | &cache_nr_sets_attr.attr); | |
533 | WARN_ON(rc); | |
534 | } | |
535 | ||
536 | /* ways_of_associativity */ | |
537 | if (new->nr_sets == 1) { | |
538 | /* fully associative */ | |
539 | new->associativity = 0; | |
540 | goto create_assoc; | |
541 | } | |
542 | ||
543 | if (new->nr_sets && new->size && new->line_size) { | |
544 | /* If we have values for all of these we can derive | |
545 | * the associativity. */ | |
546 | new->associativity = | |
547 | ((new->size * 1024) / new->nr_sets) / new->line_size; | |
548 | create_assoc: | |
549 | rc = sysfs_create_file(&new->kobj, | |
550 | &cache_assoc_attr.attr); | |
551 | WARN_ON(rc); | |
552 | } | |
553 | ||
554 | return new; | |
555 | err: | |
556 | kfree(new); | |
557 | return NULL; | |
558 | } | |
559 | ||
560 | static bool cache_is_unified(struct device_node *np) | |
561 | { | |
562 | return of_get_property(np, "cache-unified", NULL); | |
563 | } | |
564 | ||
565 | static struct cache_desc * __cpuinit create_cache_index_info(struct device_node *np, struct kobject *parent, int index, int level) | |
566 | { | |
567 | const phandle *next_cache_phandle; | |
568 | struct device_node *next_cache; | |
569 | struct cache_desc *new, **end; | |
570 | ||
571 | pr_debug("%s(node = %s, index = %d)\n", __func__, np->full_name, index); | |
572 | ||
573 | if (cache_is_unified(np)) { | |
574 | new = create_cache_desc(np, parent, index, level, | |
575 | &ucache_info); | |
576 | } else { | |
577 | new = create_cache_desc(np, parent, index, level, | |
578 | &dcache_info); | |
579 | if (new) { | |
580 | index++; | |
581 | new->next = create_cache_desc(np, parent, index, level, | |
582 | &icache_info); | |
583 | } | |
584 | } | |
585 | if (!new) | |
586 | return NULL; | |
587 | ||
588 | end = &new->next; | |
589 | while (*end) | |
590 | end = &(*end)->next; | |
591 | ||
592 | next_cache_phandle = of_get_property(np, "l2-cache", NULL); | |
593 | if (!next_cache_phandle) | |
594 | goto out; | |
595 | ||
596 | next_cache = of_find_node_by_phandle(*next_cache_phandle); | |
597 | if (!next_cache) | |
598 | goto out; | |
599 | ||
600 | *end = create_cache_index_info(next_cache, parent, ++index, ++level); | |
601 | ||
602 | of_node_put(next_cache); | |
603 | out: | |
604 | return new; | |
605 | } | |
606 | ||
607 | static void __cpuinit create_cache_info(struct sys_device *sysdev) | |
608 | { | |
609 | struct kobject *cache_toplevel; | |
610 | struct device_node *np = NULL; | |
611 | int cpu = sysdev->id; | |
612 | ||
613 | cache_toplevel = kobject_create_and_add("cache", &sysdev->kobj); | |
614 | if (!cache_toplevel) | |
615 | return; | |
616 | per_cpu(cache_toplevel, cpu) = cache_toplevel; | |
617 | np = of_get_cpu_node(cpu, NULL); | |
618 | if (np != NULL) { | |
619 | per_cpu(cache_desc, cpu) = | |
620 | create_cache_index_info(np, cache_toplevel, 0, 1); | |
621 | of_node_put(np); | |
622 | } | |
623 | return; | |
624 | } | |
1da177e4 | 625 | |
9ba1984e | 626 | static void __cpuinit register_cpu_online(unsigned int cpu) |
1da177e4 LT |
627 | { |
628 | struct cpu *c = &per_cpu(cpu_devices, cpu); | |
629 | struct sys_device *s = &c->sysdev; | |
6529c13d OJ |
630 | struct sysdev_attribute *attrs, *pmc_attrs; |
631 | int i, nattrs; | |
1da177e4 | 632 | |
b950bdd0 | 633 | #ifdef CONFIG_PPC64 |
ad5cb17f SR |
634 | if (!firmware_has_feature(FW_FEATURE_ISERIES) && |
635 | cpu_has_feature(CPU_FTR_SMT)) | |
1da177e4 | 636 | sysdev_create_file(s, &attr_smt_snooze_delay); |
b950bdd0 | 637 | #endif |
1da177e4 LT |
638 | |
639 | /* PMC stuff */ | |
6529c13d | 640 | switch (cur_cpu_spec->pmc_type) { |
b950bdd0 | 641 | #ifdef HAS_PPC_PMC_IBM |
6529c13d OJ |
642 | case PPC_PMC_IBM: |
643 | attrs = ibm_common_attrs; | |
644 | nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute); | |
b950bdd0 | 645 | pmc_attrs = classic_pmc_attrs; |
6529c13d | 646 | break; |
b950bdd0 BH |
647 | #endif /* HAS_PPC_PMC_IBM */ |
648 | #ifdef HAS_PPC_PMC_G4 | |
649 | case PPC_PMC_G4: | |
650 | attrs = g4_common_attrs; | |
651 | nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute); | |
652 | pmc_attrs = classic_pmc_attrs; | |
653 | break; | |
654 | #endif /* HAS_PPC_PMC_G4 */ | |
655 | #ifdef HAS_PPC_PMC_PA6T | |
6529c13d OJ |
656 | case PPC_PMC_PA6T: |
657 | /* PA Semi starts counting at PMC0 */ | |
658 | attrs = pa6t_attrs; | |
659 | nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute); | |
660 | pmc_attrs = NULL; | |
661 | break; | |
b950bdd0 | 662 | #endif /* HAS_PPC_PMC_PA6T */ |
6529c13d OJ |
663 | default: |
664 | attrs = NULL; | |
665 | nattrs = 0; | |
666 | pmc_attrs = NULL; | |
667 | } | |
668 | ||
669 | for (i = 0; i < nattrs; i++) | |
670 | sysdev_create_file(s, &attrs[i]); | |
1da177e4 | 671 | |
6529c13d OJ |
672 | if (pmc_attrs) |
673 | for (i = 0; i < cur_cpu_spec->num_pmcs; i++) | |
674 | sysdev_create_file(s, &pmc_attrs[i]); | |
1da177e4 | 675 | |
b950bdd0 | 676 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
677 | if (cpu_has_feature(CPU_FTR_MMCRA)) |
678 | sysdev_create_file(s, &attr_mmcra); | |
679 | ||
afd05423 | 680 | if (cpu_has_feature(CPU_FTR_PURR)) |
1da177e4 | 681 | sysdev_create_file(s, &attr_purr); |
4c198557 | 682 | |
f050982a AB |
683 | if (cpu_has_feature(CPU_FTR_SPURR)) |
684 | sysdev_create_file(s, &attr_spurr); | |
685 | ||
4c198557 AB |
686 | if (cpu_has_feature(CPU_FTR_DSCR)) |
687 | sysdev_create_file(s, &attr_dscr); | |
b950bdd0 | 688 | #endif /* CONFIG_PPC64 */ |
124c27d3 NL |
689 | |
690 | create_cache_info(s); | |
1da177e4 LT |
691 | } |
692 | ||
693 | #ifdef CONFIG_HOTPLUG_CPU | |
124c27d3 NL |
694 | static void remove_cache_info(struct sys_device *sysdev) |
695 | { | |
696 | struct kobject *cache_toplevel; | |
697 | struct cache_desc *cache_desc; | |
698 | int cpu = sysdev->id; | |
699 | ||
700 | cache_desc = per_cpu(cache_desc, cpu); | |
f3d3d307 | 701 | if (cache_desc != NULL) |
124c27d3 | 702 | kobject_put(&cache_desc->kobj); |
f3d3d307 | 703 | |
124c27d3 NL |
704 | cache_toplevel = per_cpu(cache_toplevel, cpu); |
705 | if (cache_toplevel != NULL) | |
706 | kobject_put(cache_toplevel); | |
707 | } | |
708 | ||
1da177e4 LT |
709 | static void unregister_cpu_online(unsigned int cpu) |
710 | { | |
711 | struct cpu *c = &per_cpu(cpu_devices, cpu); | |
712 | struct sys_device *s = &c->sysdev; | |
6529c13d OJ |
713 | struct sysdev_attribute *attrs, *pmc_attrs; |
714 | int i, nattrs; | |
1da177e4 | 715 | |
72486f1f | 716 | BUG_ON(!c->hotpluggable); |
1da177e4 | 717 | |
ad5cb17f SR |
718 | if (!firmware_has_feature(FW_FEATURE_ISERIES) && |
719 | cpu_has_feature(CPU_FTR_SMT)) | |
1da177e4 | 720 | sysdev_remove_file(s, &attr_smt_snooze_delay); |
1da177e4 LT |
721 | |
722 | /* PMC stuff */ | |
6529c13d | 723 | switch (cur_cpu_spec->pmc_type) { |
b950bdd0 | 724 | #ifdef HAS_PPC_PMC_IBM |
6529c13d OJ |
725 | case PPC_PMC_IBM: |
726 | attrs = ibm_common_attrs; | |
727 | nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute); | |
b950bdd0 BH |
728 | pmc_attrs = classic_pmc_attrs; |
729 | break; | |
730 | #endif /* HAS_PPC_PMC_IBM */ | |
731 | #ifdef HAS_PPC_PMC_G4 | |
732 | case PPC_PMC_G4: | |
733 | attrs = g4_common_attrs; | |
734 | nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute); | |
735 | pmc_attrs = classic_pmc_attrs; | |
6529c13d | 736 | break; |
b950bdd0 BH |
737 | #endif /* HAS_PPC_PMC_G4 */ |
738 | #ifdef HAS_PPC_PMC_PA6T | |
6529c13d OJ |
739 | case PPC_PMC_PA6T: |
740 | /* PA Semi starts counting at PMC0 */ | |
741 | attrs = pa6t_attrs; | |
742 | nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute); | |
743 | pmc_attrs = NULL; | |
744 | break; | |
b950bdd0 | 745 | #endif /* HAS_PPC_PMC_PA6T */ |
6529c13d OJ |
746 | default: |
747 | attrs = NULL; | |
748 | nattrs = 0; | |
749 | pmc_attrs = NULL; | |
750 | } | |
1da177e4 | 751 | |
6529c13d OJ |
752 | for (i = 0; i < nattrs; i++) |
753 | sysdev_remove_file(s, &attrs[i]); | |
754 | ||
755 | if (pmc_attrs) | |
756 | for (i = 0; i < cur_cpu_spec->num_pmcs; i++) | |
757 | sysdev_remove_file(s, &pmc_attrs[i]); | |
1da177e4 | 758 | |
b950bdd0 | 759 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
760 | if (cpu_has_feature(CPU_FTR_MMCRA)) |
761 | sysdev_remove_file(s, &attr_mmcra); | |
762 | ||
afd05423 | 763 | if (cpu_has_feature(CPU_FTR_PURR)) |
1da177e4 | 764 | sysdev_remove_file(s, &attr_purr); |
4c198557 | 765 | |
f050982a AB |
766 | if (cpu_has_feature(CPU_FTR_SPURR)) |
767 | sysdev_remove_file(s, &attr_spurr); | |
768 | ||
4c198557 AB |
769 | if (cpu_has_feature(CPU_FTR_DSCR)) |
770 | sysdev_remove_file(s, &attr_dscr); | |
b950bdd0 | 771 | #endif /* CONFIG_PPC64 */ |
124c27d3 NL |
772 | |
773 | remove_cache_info(s); | |
1da177e4 LT |
774 | } |
775 | #endif /* CONFIG_HOTPLUG_CPU */ | |
776 | ||
8c78f307 | 777 | static int __cpuinit sysfs_cpu_notify(struct notifier_block *self, |
1da177e4 LT |
778 | unsigned long action, void *hcpu) |
779 | { | |
780 | unsigned int cpu = (unsigned int)(long)hcpu; | |
781 | ||
782 | switch (action) { | |
783 | case CPU_ONLINE: | |
8bb78442 | 784 | case CPU_ONLINE_FROZEN: |
1da177e4 LT |
785 | register_cpu_online(cpu); |
786 | break; | |
787 | #ifdef CONFIG_HOTPLUG_CPU | |
788 | case CPU_DEAD: | |
8bb78442 | 789 | case CPU_DEAD_FROZEN: |
1da177e4 LT |
790 | unregister_cpu_online(cpu); |
791 | break; | |
792 | #endif | |
793 | } | |
794 | return NOTIFY_OK; | |
795 | } | |
796 | ||
8c78f307 | 797 | static struct notifier_block __cpuinitdata sysfs_cpu_nb = { |
1da177e4 LT |
798 | .notifier_call = sysfs_cpu_notify, |
799 | }; | |
800 | ||
0344c6c5 CK |
801 | static DEFINE_MUTEX(cpu_mutex); |
802 | ||
803 | int cpu_add_sysdev_attr(struct sysdev_attribute *attr) | |
804 | { | |
805 | int cpu; | |
806 | ||
807 | mutex_lock(&cpu_mutex); | |
808 | ||
809 | for_each_possible_cpu(cpu) { | |
810 | sysdev_create_file(get_cpu_sysdev(cpu), attr); | |
811 | } | |
812 | ||
813 | mutex_unlock(&cpu_mutex); | |
814 | return 0; | |
815 | } | |
816 | EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr); | |
817 | ||
818 | int cpu_add_sysdev_attr_group(struct attribute_group *attrs) | |
819 | { | |
820 | int cpu; | |
821 | struct sys_device *sysdev; | |
6bcc4c01 | 822 | int ret; |
0344c6c5 CK |
823 | |
824 | mutex_lock(&cpu_mutex); | |
825 | ||
826 | for_each_possible_cpu(cpu) { | |
827 | sysdev = get_cpu_sysdev(cpu); | |
6bcc4c01 OJ |
828 | ret = sysfs_create_group(&sysdev->kobj, attrs); |
829 | WARN_ON(ret != 0); | |
0344c6c5 CK |
830 | } |
831 | ||
832 | mutex_unlock(&cpu_mutex); | |
833 | return 0; | |
834 | } | |
835 | EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group); | |
836 | ||
837 | ||
838 | void cpu_remove_sysdev_attr(struct sysdev_attribute *attr) | |
839 | { | |
840 | int cpu; | |
841 | ||
842 | mutex_lock(&cpu_mutex); | |
843 | ||
844 | for_each_possible_cpu(cpu) { | |
845 | sysdev_remove_file(get_cpu_sysdev(cpu), attr); | |
846 | } | |
847 | ||
848 | mutex_unlock(&cpu_mutex); | |
849 | } | |
850 | EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr); | |
851 | ||
852 | void cpu_remove_sysdev_attr_group(struct attribute_group *attrs) | |
853 | { | |
854 | int cpu; | |
855 | struct sys_device *sysdev; | |
856 | ||
857 | mutex_lock(&cpu_mutex); | |
858 | ||
859 | for_each_possible_cpu(cpu) { | |
860 | sysdev = get_cpu_sysdev(cpu); | |
861 | sysfs_remove_group(&sysdev->kobj, attrs); | |
862 | } | |
863 | ||
864 | mutex_unlock(&cpu_mutex); | |
865 | } | |
866 | EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group); | |
867 | ||
868 | ||
1da177e4 LT |
869 | /* NUMA stuff */ |
870 | ||
871 | #ifdef CONFIG_NUMA | |
1da177e4 LT |
872 | static void register_nodes(void) |
873 | { | |
874 | int i; | |
875 | ||
0fc44159 YG |
876 | for (i = 0; i < MAX_NUMNODES; i++) |
877 | register_one_node(i); | |
1da177e4 | 878 | } |
953039c8 JK |
879 | |
880 | int sysfs_add_device_to_node(struct sys_device *dev, int nid) | |
881 | { | |
882 | struct node *node = &node_devices[nid]; | |
883 | return sysfs_create_link(&node->sysdev.kobj, &dev->kobj, | |
884 | kobject_name(&dev->kobj)); | |
885 | } | |
12654f77 | 886 | EXPORT_SYMBOL_GPL(sysfs_add_device_to_node); |
953039c8 JK |
887 | |
888 | void sysfs_remove_device_from_node(struct sys_device *dev, int nid) | |
889 | { | |
890 | struct node *node = &node_devices[nid]; | |
891 | sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj)); | |
892 | } | |
12654f77 | 893 | EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node); |
953039c8 | 894 | |
1da177e4 LT |
895 | #else |
896 | static void register_nodes(void) | |
897 | { | |
898 | return; | |
899 | } | |
953039c8 | 900 | |
1da177e4 LT |
901 | #endif |
902 | ||
903 | /* Only valid if CPU is present. */ | |
00bf6e90 SR |
904 | static ssize_t show_physical_id(struct sys_device *dev, |
905 | struct sysdev_attribute *attr, char *buf) | |
1da177e4 LT |
906 | { |
907 | struct cpu *cpu = container_of(dev, struct cpu, sysdev); | |
908 | ||
909 | return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id)); | |
910 | } | |
911 | static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL); | |
912 | ||
913 | static int __init topology_init(void) | |
914 | { | |
915 | int cpu; | |
1da177e4 LT |
916 | |
917 | register_nodes(); | |
1da177e4 LT |
918 | register_cpu_notifier(&sysfs_cpu_nb); |
919 | ||
0e551954 | 920 | for_each_possible_cpu(cpu) { |
1da177e4 LT |
921 | struct cpu *c = &per_cpu(cpu_devices, cpu); |
922 | ||
1da177e4 LT |
923 | /* |
924 | * For now, we just see if the system supports making | |
925 | * the RTAS calls for CPU hotplug. But, there may be a | |
926 | * more comprehensive way to do this for an individual | |
927 | * CPU. For instance, the boot cpu might never be valid | |
928 | * for hotplugging. | |
929 | */ | |
72486f1f SS |
930 | if (ppc_md.cpu_die) |
931 | c->hotpluggable = 1; | |
1da177e4 | 932 | |
72486f1f | 933 | if (cpu_online(cpu) || c->hotpluggable) { |
76b67ed9 | 934 | register_cpu(c, cpu); |
1da177e4 LT |
935 | |
936 | sysdev_create_file(&c->sysdev, &attr_physical_id); | |
937 | } | |
938 | ||
939 | if (cpu_online(cpu)) | |
940 | register_cpu_online(cpu); | |
941 | } | |
942 | ||
943 | return 0; | |
944 | } | |
e9e77ce8 | 945 | subsys_initcall(topology_init); |