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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * drivers/s390/sysinfo.c | |
3 | * | |
6bcac508 MS |
4 | * Copyright IBM Corp. 2001, 2008 |
5 | * Author(s): Ulrich Weigand (Ulrich.Weigand@de.ibm.com) | |
6 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
1da177e4 LT |
7 | */ |
8 | ||
1da177e4 LT |
9 | #include <linux/kernel.h> |
10 | #include <linux/mm.h> | |
11 | #include <linux/proc_fs.h> | |
6bcac508 | 12 | #include <linux/seq_file.h> |
1da177e4 | 13 | #include <linux/init.h> |
31ee4b2f | 14 | #include <linux/delay.h> |
6bcac508 | 15 | #include <linux/module.h> |
1da177e4 | 16 | #include <asm/ebcdic.h> |
aa24f7f0 | 17 | #include <asm/sysinfo.h> |
6bcac508 | 18 | #include <asm/cpcmd.h> |
1da177e4 | 19 | |
31ee4b2f MS |
20 | /* Sigh, math-emu. Don't ask. */ |
21 | #include <asm/sfp-util.h> | |
22 | #include <math-emu/soft-fp.h> | |
23 | #include <math-emu/single.h> | |
24 | ||
0fee644a | 25 | static inline int stsi_0(void) |
1da177e4 LT |
26 | { |
27 | int rc = stsi (NULL, 0, 0, 0); | |
0fee644a | 28 | return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28); |
1da177e4 LT |
29 | } |
30 | ||
0fee644a | 31 | static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len) |
1da177e4 | 32 | { |
0fee644a MS |
33 | if (stsi(info, 1, 1, 1) == -ENOSYS) |
34 | return len; | |
35 | ||
36 | EBCASC(info->manufacturer, sizeof(info->manufacturer)); | |
37 | EBCASC(info->type, sizeof(info->type)); | |
38 | EBCASC(info->model, sizeof(info->model)); | |
39 | EBCASC(info->sequence, sizeof(info->sequence)); | |
40 | EBCASC(info->plant, sizeof(info->plant)); | |
41 | EBCASC(info->model_capacity, sizeof(info->model_capacity)); | |
cbce70e6 MS |
42 | EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap)); |
43 | EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap)); | |
0fee644a MS |
44 | len += sprintf(page + len, "Manufacturer: %-16.16s\n", |
45 | info->manufacturer); | |
46 | len += sprintf(page + len, "Type: %-4.4s\n", | |
47 | info->type); | |
48 | if (info->model[0] != '\0') | |
49 | /* | |
50 | * Sigh: the model field has been renamed with System z9 | |
51 | * to model_capacity and a new model field has been added | |
52 | * after the plant field. To avoid confusing older programs | |
53 | * the "Model:" prints "model_capacity model" or just | |
54 | * "model_capacity" if the model string is empty . | |
55 | */ | |
56 | len += sprintf(page + len, | |
57 | "Model: %-16.16s %-16.16s\n", | |
58 | info->model_capacity, info->model); | |
59 | else | |
60 | len += sprintf(page + len, "Model: %-16.16s\n", | |
61 | info->model_capacity); | |
62 | len += sprintf(page + len, "Sequence Code: %-16.16s\n", | |
63 | info->sequence); | |
64 | len += sprintf(page + len, "Plant: %-4.4s\n", | |
65 | info->plant); | |
cbce70e6 MS |
66 | len += sprintf(page + len, "Model Capacity: %-16.16s %08u\n", |
67 | info->model_capacity, *(u32 *) info->model_cap_rating); | |
68 | if (info->model_perm_cap[0] != '\0') | |
69 | len += sprintf(page + len, | |
70 | "Model Perm. Capacity: %-16.16s %08u\n", | |
71 | info->model_perm_cap, | |
72 | *(u32 *) info->model_perm_cap_rating); | |
73 | if (info->model_temp_cap[0] != '\0') | |
74 | len += sprintf(page + len, | |
75 | "Model Temp. Capacity: %-16.16s %08u\n", | |
76 | info->model_temp_cap, | |
77 | *(u32 *) info->model_temp_cap_rating); | |
0fee644a | 78 | return len; |
1da177e4 LT |
79 | } |
80 | ||
0fee644a MS |
81 | #if 0 /* Currently unused */ |
82 | static int stsi_1_2_1(struct sysinfo_1_2_1 *info, char *page, int len) | |
1da177e4 | 83 | { |
0fee644a MS |
84 | if (stsi(info, 1, 2, 1) == -ENOSYS) |
85 | return len; | |
86 | ||
87 | len += sprintf(page + len, "\n"); | |
88 | EBCASC(info->sequence, sizeof(info->sequence)); | |
89 | EBCASC(info->plant, sizeof(info->plant)); | |
90 | len += sprintf(page + len, "Sequence Code of CPU: %-16.16s\n", | |
91 | info->sequence); | |
92 | len += sprintf(page + len, "Plant of CPU: %-16.16s\n", | |
93 | info->plant); | |
94 | return len; | |
1da177e4 | 95 | } |
0fee644a | 96 | #endif |
1da177e4 | 97 | |
0fee644a | 98 | static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len) |
1da177e4 | 99 | { |
0fee644a MS |
100 | struct sysinfo_1_2_2_extension *ext; |
101 | int i; | |
102 | ||
103 | if (stsi(info, 1, 2, 2) == -ENOSYS) | |
104 | return len; | |
105 | ext = (struct sysinfo_1_2_2_extension *) | |
106 | ((unsigned long) info + info->acc_offset); | |
107 | ||
108 | len += sprintf(page + len, "\n"); | |
109 | len += sprintf(page + len, "CPUs Total: %d\n", | |
110 | info->cpus_total); | |
111 | len += sprintf(page + len, "CPUs Configured: %d\n", | |
112 | info->cpus_configured); | |
113 | len += sprintf(page + len, "CPUs Standby: %d\n", | |
114 | info->cpus_standby); | |
115 | len += sprintf(page + len, "CPUs Reserved: %d\n", | |
116 | info->cpus_reserved); | |
117 | ||
118 | if (info->format == 1) { | |
119 | /* | |
120 | * Sigh 2. According to the specification the alternate | |
121 | * capability field is a 32 bit floating point number | |
122 | * if the higher order 8 bits are not zero. Printing | |
123 | * a floating point number in the kernel is a no-no, | |
124 | * always print the number as 32 bit unsigned integer. | |
31ee4b2f | 125 | * The user-space needs to know about the strange |
0fee644a MS |
126 | * encoding of the alternate cpu capability. |
127 | */ | |
128 | len += sprintf(page + len, "Capability: %u %u\n", | |
129 | info->capability, ext->alt_capability); | |
130 | for (i = 2; i <= info->cpus_total; i++) | |
131 | len += sprintf(page + len, | |
132 | "Adjustment %02d-way: %u %u\n", | |
133 | i, info->adjustment[i-2], | |
134 | ext->alt_adjustment[i-2]); | |
135 | ||
136 | } else { | |
137 | len += sprintf(page + len, "Capability: %u\n", | |
138 | info->capability); | |
139 | for (i = 2; i <= info->cpus_total; i++) | |
140 | len += sprintf(page + len, | |
141 | "Adjustment %02d-way: %u\n", | |
142 | i, info->adjustment[i-2]); | |
143 | } | |
144 | ||
145 | if (info->secondary_capability != 0) | |
146 | len += sprintf(page + len, "Secondary Capability: %d\n", | |
147 | info->secondary_capability); | |
148 | ||
149 | return len; | |
1da177e4 LT |
150 | } |
151 | ||
0fee644a MS |
152 | #if 0 /* Currently unused */ |
153 | static int stsi_2_2_1(struct sysinfo_2_2_1 *info, char *page, int len) | |
1da177e4 | 154 | { |
0fee644a MS |
155 | if (stsi(info, 2, 2, 1) == -ENOSYS) |
156 | return len; | |
157 | ||
158 | len += sprintf(page + len, "\n"); | |
159 | EBCASC (info->sequence, sizeof(info->sequence)); | |
160 | EBCASC (info->plant, sizeof(info->plant)); | |
161 | len += sprintf(page + len, "Sequence Code of logical CPU: %-16.16s\n", | |
162 | info->sequence); | |
163 | len += sprintf(page + len, "Plant of logical CPU: %-16.16s\n", | |
164 | info->plant); | |
165 | return len; | |
1da177e4 | 166 | } |
0fee644a | 167 | #endif |
1da177e4 | 168 | |
0fee644a | 169 | static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len) |
1da177e4 | 170 | { |
0fee644a MS |
171 | if (stsi(info, 2, 2, 2) == -ENOSYS) |
172 | return len; | |
173 | ||
174 | EBCASC (info->name, sizeof(info->name)); | |
175 | ||
176 | len += sprintf(page + len, "\n"); | |
177 | len += sprintf(page + len, "LPAR Number: %d\n", | |
178 | info->lpar_number); | |
179 | ||
180 | len += sprintf(page + len, "LPAR Characteristics: "); | |
181 | if (info->characteristics & LPAR_CHAR_DEDICATED) | |
182 | len += sprintf(page + len, "Dedicated "); | |
183 | if (info->characteristics & LPAR_CHAR_SHARED) | |
184 | len += sprintf(page + len, "Shared "); | |
185 | if (info->characteristics & LPAR_CHAR_LIMITED) | |
186 | len += sprintf(page + len, "Limited "); | |
187 | len += sprintf(page + len, "\n"); | |
188 | ||
189 | len += sprintf(page + len, "LPAR Name: %-8.8s\n", | |
190 | info->name); | |
191 | ||
192 | len += sprintf(page + len, "LPAR Adjustment: %d\n", | |
193 | info->caf); | |
194 | ||
195 | len += sprintf(page + len, "LPAR CPUs Total: %d\n", | |
196 | info->cpus_total); | |
197 | len += sprintf(page + len, "LPAR CPUs Configured: %d\n", | |
198 | info->cpus_configured); | |
199 | len += sprintf(page + len, "LPAR CPUs Standby: %d\n", | |
200 | info->cpus_standby); | |
201 | len += sprintf(page + len, "LPAR CPUs Reserved: %d\n", | |
202 | info->cpus_reserved); | |
203 | len += sprintf(page + len, "LPAR CPUs Dedicated: %d\n", | |
204 | info->cpus_dedicated); | |
205 | len += sprintf(page + len, "LPAR CPUs Shared: %d\n", | |
206 | info->cpus_shared); | |
207 | return len; | |
1da177e4 LT |
208 | } |
209 | ||
0fee644a | 210 | static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len) |
1da177e4 | 211 | { |
0fee644a MS |
212 | int i; |
213 | ||
214 | if (stsi(info, 3, 2, 2) == -ENOSYS) | |
215 | return len; | |
216 | for (i = 0; i < info->count; i++) { | |
217 | EBCASC (info->vm[i].name, sizeof(info->vm[i].name)); | |
218 | EBCASC (info->vm[i].cpi, sizeof(info->vm[i].cpi)); | |
219 | len += sprintf(page + len, "\n"); | |
220 | len += sprintf(page + len, "VM%02d Name: %-8.8s\n", | |
221 | i, info->vm[i].name); | |
222 | len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n", | |
223 | i, info->vm[i].cpi); | |
224 | ||
225 | len += sprintf(page + len, "VM%02d Adjustment: %d\n", | |
226 | i, info->vm[i].caf); | |
227 | ||
228 | len += sprintf(page + len, "VM%02d CPUs Total: %d\n", | |
229 | i, info->vm[i].cpus_total); | |
230 | len += sprintf(page + len, "VM%02d CPUs Configured: %d\n", | |
231 | i, info->vm[i].cpus_configured); | |
232 | len += sprintf(page + len, "VM%02d CPUs Standby: %d\n", | |
233 | i, info->vm[i].cpus_standby); | |
234 | len += sprintf(page + len, "VM%02d CPUs Reserved: %d\n", | |
235 | i, info->vm[i].cpus_reserved); | |
1da177e4 | 236 | } |
0fee644a | 237 | return len; |
1da177e4 LT |
238 | } |
239 | ||
240 | ||
241 | static int proc_read_sysinfo(char *page, char **start, | |
242 | off_t off, int count, | |
243 | int *eof, void *data) | |
244 | { | |
0fee644a MS |
245 | unsigned long info = get_zeroed_page (GFP_KERNEL); |
246 | int level, len; | |
1da177e4 LT |
247 | |
248 | if (!info) | |
249 | return 0; | |
250 | ||
0fee644a MS |
251 | len = 0; |
252 | level = stsi_0(); | |
253 | if (level >= 1) | |
254 | len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len); | |
1da177e4 | 255 | |
0fee644a MS |
256 | if (level >= 1) |
257 | len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len); | |
1da177e4 | 258 | |
0fee644a MS |
259 | if (level >= 2) |
260 | len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len); | |
1da177e4 | 261 | |
0fee644a MS |
262 | if (level >= 3) |
263 | len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len); | |
1da177e4 | 264 | |
0fee644a | 265 | free_page (info); |
1da177e4 LT |
266 | return len; |
267 | } | |
268 | ||
269 | static __init int create_proc_sysinfo(void) | |
270 | { | |
0fee644a MS |
271 | create_proc_read_entry("sysinfo", 0444, NULL, |
272 | proc_read_sysinfo, NULL); | |
1da177e4 LT |
273 | return 0; |
274 | } | |
275 | ||
276 | __initcall(create_proc_sysinfo); | |
277 | ||
6bcac508 MS |
278 | /* |
279 | * Service levels interface. | |
280 | */ | |
281 | ||
282 | static DECLARE_RWSEM(service_level_sem); | |
283 | static LIST_HEAD(service_level_list); | |
284 | ||
285 | int register_service_level(struct service_level *slr) | |
286 | { | |
287 | struct service_level *ptr; | |
288 | ||
289 | down_write(&service_level_sem); | |
290 | list_for_each_entry(ptr, &service_level_list, list) | |
291 | if (ptr == slr) { | |
292 | up_write(&service_level_sem); | |
293 | return -EEXIST; | |
294 | } | |
295 | list_add_tail(&slr->list, &service_level_list); | |
296 | up_write(&service_level_sem); | |
297 | return 0; | |
298 | } | |
299 | EXPORT_SYMBOL(register_service_level); | |
300 | ||
301 | int unregister_service_level(struct service_level *slr) | |
302 | { | |
303 | struct service_level *ptr, *next; | |
304 | int rc = -ENOENT; | |
305 | ||
306 | down_write(&service_level_sem); | |
307 | list_for_each_entry_safe(ptr, next, &service_level_list, list) { | |
308 | if (ptr != slr) | |
309 | continue; | |
310 | list_del(&ptr->list); | |
311 | rc = 0; | |
312 | break; | |
313 | } | |
314 | up_write(&service_level_sem); | |
315 | return rc; | |
316 | } | |
317 | EXPORT_SYMBOL(unregister_service_level); | |
318 | ||
319 | static void *service_level_start(struct seq_file *m, loff_t *pos) | |
320 | { | |
321 | down_read(&service_level_sem); | |
322 | return seq_list_start(&service_level_list, *pos); | |
323 | } | |
324 | ||
325 | static void *service_level_next(struct seq_file *m, void *p, loff_t *pos) | |
326 | { | |
327 | return seq_list_next(p, &service_level_list, pos); | |
328 | } | |
329 | ||
330 | static void service_level_stop(struct seq_file *m, void *p) | |
331 | { | |
332 | up_read(&service_level_sem); | |
333 | } | |
334 | ||
335 | static int service_level_show(struct seq_file *m, void *p) | |
336 | { | |
337 | struct service_level *slr; | |
338 | ||
339 | slr = list_entry(p, struct service_level, list); | |
340 | slr->seq_print(m, slr); | |
341 | return 0; | |
342 | } | |
343 | ||
344 | static const struct seq_operations service_level_seq_ops = { | |
345 | .start = service_level_start, | |
346 | .next = service_level_next, | |
347 | .stop = service_level_stop, | |
348 | .show = service_level_show | |
349 | }; | |
350 | ||
351 | static int service_level_open(struct inode *inode, struct file *file) | |
352 | { | |
353 | return seq_open(file, &service_level_seq_ops); | |
354 | } | |
355 | ||
356 | static const struct file_operations service_level_ops = { | |
357 | .open = service_level_open, | |
358 | .read = seq_read, | |
359 | .llseek = seq_lseek, | |
360 | .release = seq_release | |
361 | }; | |
362 | ||
363 | static void service_level_vm_print(struct seq_file *m, | |
364 | struct service_level *slr) | |
365 | { | |
366 | char *query_buffer, *str; | |
367 | ||
368 | query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA); | |
369 | if (!query_buffer) | |
370 | return; | |
371 | cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL); | |
372 | str = strchr(query_buffer, '\n'); | |
373 | if (str) | |
374 | *str = 0; | |
375 | seq_printf(m, "VM: %s\n", query_buffer); | |
376 | kfree(query_buffer); | |
377 | } | |
378 | ||
379 | static struct service_level service_level_vm = { | |
380 | .seq_print = service_level_vm_print | |
381 | }; | |
382 | ||
383 | static __init int create_proc_service_level(void) | |
384 | { | |
385 | proc_create("service_levels", 0, NULL, &service_level_ops); | |
386 | if (MACHINE_IS_VM) | |
387 | register_service_level(&service_level_vm); | |
388 | return 0; | |
389 | } | |
390 | ||
391 | subsys_initcall(create_proc_service_level); | |
392 | ||
393 | /* | |
394 | * Bogomips calculation based on cpu capability. | |
395 | */ | |
396 | ||
2fc2d1e9 HC |
397 | int get_cpu_capability(unsigned int *capability) |
398 | { | |
399 | struct sysinfo_1_2_2 *info; | |
400 | int rc; | |
401 | ||
402 | info = (void *) get_zeroed_page(GFP_KERNEL); | |
403 | if (!info) | |
404 | return -ENOMEM; | |
405 | rc = stsi(info, 1, 2, 2); | |
406 | if (rc == -ENOSYS) | |
407 | goto out; | |
408 | rc = 0; | |
409 | *capability = info->capability; | |
410 | out: | |
411 | free_page((unsigned long) info); | |
412 | return rc; | |
413 | } | |
414 | ||
31ee4b2f MS |
415 | /* |
416 | * CPU capability might have changed. Therefore recalculate loops_per_jiffy. | |
417 | */ | |
418 | void s390_adjust_jiffies(void) | |
419 | { | |
420 | struct sysinfo_1_2_2 *info; | |
421 | const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */ | |
422 | FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR); | |
423 | FP_DECL_EX; | |
424 | unsigned int capability; | |
425 | ||
426 | info = (void *) get_zeroed_page(GFP_KERNEL); | |
427 | if (!info) | |
428 | return; | |
429 | ||
430 | if (stsi(info, 1, 2, 2) != -ENOSYS) { | |
431 | /* | |
432 | * Major sigh. The cpu capability encoding is "special". | |
433 | * If the first 9 bits of info->capability are 0 then it | |
434 | * is a 32 bit unsigned integer in the range 0 .. 2^23. | |
435 | * If the first 9 bits are != 0 then it is a 32 bit float. | |
436 | * In addition a lower value indicates a proportionally | |
437 | * higher cpu capacity. Bogomips are the other way round. | |
438 | * To get to a halfway suitable number we divide 1e7 | |
439 | * by the cpu capability number. Yes, that means a floating | |
440 | * point division .. math-emu here we come :-) | |
441 | */ | |
442 | FP_UNPACK_SP(SA, &fmil); | |
443 | if ((info->capability >> 23) == 0) | |
444 | FP_FROM_INT_S(SB, info->capability, 32, int); | |
445 | else | |
446 | FP_UNPACK_SP(SB, &info->capability); | |
447 | FP_DIV_S(SR, SA, SB); | |
448 | FP_TO_INT_S(capability, SR, 32, 0); | |
449 | } else | |
450 | /* | |
451 | * Really old machine without stsi block for basic | |
452 | * cpu information. Report 42.0 bogomips. | |
453 | */ | |
454 | capability = 42; | |
455 | loops_per_jiffy = capability * (500000/HZ); | |
456 | free_page((unsigned long) info); | |
457 | } | |
458 | ||
459 | /* | |
460 | * calibrate the delay loop | |
461 | */ | |
6c81c32f | 462 | void __cpuinit calibrate_delay(void) |
31ee4b2f MS |
463 | { |
464 | s390_adjust_jiffies(); | |
465 | /* Print the good old Bogomips line .. */ | |
466 | printk(KERN_DEBUG "Calibrating delay loop (skipped)... " | |
467 | "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ), | |
468 | (loops_per_jiffy/(5000/HZ)) % 100); | |
469 | } |