Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
94f5b09d HC |
2 | * Copyright IBM Corp. 2001, 2009 |
3 | * Author(s): Ulrich Weigand <Ulrich.Weigand@de.ibm.com>, | |
4 | * Martin Schwidefsky <schwidefsky@de.ibm.com>, | |
1da177e4 LT |
5 | */ |
6 | ||
1da177e4 LT |
7 | #include <linux/kernel.h> |
8 | #include <linux/mm.h> | |
9 | #include <linux/proc_fs.h> | |
6bcac508 | 10 | #include <linux/seq_file.h> |
1da177e4 | 11 | #include <linux/init.h> |
31ee4b2f | 12 | #include <linux/delay.h> |
6bcac508 | 13 | #include <linux/module.h> |
5a0e3ad6 | 14 | #include <linux/slab.h> |
1da177e4 | 15 | #include <asm/ebcdic.h> |
aa24f7f0 | 16 | #include <asm/sysinfo.h> |
6bcac508 | 17 | #include <asm/cpcmd.h> |
96f4a70d | 18 | #include <asm/topology.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 | 26 | { |
94f5b09d | 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); | |
7aca2eda HC |
78 | if (info->cai) { |
79 | len += sprintf(page + len, | |
80 | "Capacity Adj. Ind.: %d\n", | |
81 | info->cai); | |
82 | len += sprintf(page + len, "Capacity Ch. Reason: %d\n", | |
83 | info->ccr); | |
84 | } | |
0fee644a | 85 | return len; |
1da177e4 LT |
86 | } |
87 | ||
96f4a70d HC |
88 | static int stsi_15_1_x(struct sysinfo_15_1_x *info, char *page, int len) |
89 | { | |
90 | static int max_mnest; | |
91 | int i, rc; | |
92 | ||
93 | len += sprintf(page + len, "\n"); | |
94 | if (!MACHINE_HAS_TOPOLOGY) | |
95 | return len; | |
96 | if (max_mnest) { | |
97 | stsi(info, 15, 1, max_mnest); | |
98 | } else { | |
99 | for (max_mnest = 6; max_mnest > 1; max_mnest--) { | |
100 | rc = stsi(info, 15, 1, max_mnest); | |
101 | if (rc != -ENOSYS) | |
102 | break; | |
103 | } | |
104 | } | |
105 | len += sprintf(page + len, "CPU Topology HW: "); | |
106 | for (i = 0; i < TOPOLOGY_NR_MAG; i++) | |
107 | len += sprintf(page + len, " %d", info->mag[i]); | |
108 | len += sprintf(page + len, "\n"); | |
109 | store_topology(info); | |
110 | len += sprintf(page + len, "CPU Topology SW: "); | |
111 | for (i = 0; i < TOPOLOGY_NR_MAG; i++) | |
112 | len += sprintf(page + len, " %d", info->mag[i]); | |
113 | len += sprintf(page + len, "\n"); | |
114 | return len; | |
115 | } | |
116 | ||
0fee644a | 117 | static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len) |
1da177e4 | 118 | { |
0fee644a MS |
119 | struct sysinfo_1_2_2_extension *ext; |
120 | int i; | |
121 | ||
122 | if (stsi(info, 1, 2, 2) == -ENOSYS) | |
123 | return len; | |
124 | ext = (struct sysinfo_1_2_2_extension *) | |
125 | ((unsigned long) info + info->acc_offset); | |
126 | ||
0fee644a MS |
127 | len += sprintf(page + len, "CPUs Total: %d\n", |
128 | info->cpus_total); | |
129 | len += sprintf(page + len, "CPUs Configured: %d\n", | |
130 | info->cpus_configured); | |
131 | len += sprintf(page + len, "CPUs Standby: %d\n", | |
132 | info->cpus_standby); | |
133 | len += sprintf(page + len, "CPUs Reserved: %d\n", | |
134 | info->cpus_reserved); | |
135 | ||
136 | if (info->format == 1) { | |
137 | /* | |
138 | * Sigh 2. According to the specification the alternate | |
139 | * capability field is a 32 bit floating point number | |
140 | * if the higher order 8 bits are not zero. Printing | |
141 | * a floating point number in the kernel is a no-no, | |
142 | * always print the number as 32 bit unsigned integer. | |
31ee4b2f | 143 | * The user-space needs to know about the strange |
0fee644a MS |
144 | * encoding of the alternate cpu capability. |
145 | */ | |
146 | len += sprintf(page + len, "Capability: %u %u\n", | |
147 | info->capability, ext->alt_capability); | |
148 | for (i = 2; i <= info->cpus_total; i++) | |
149 | len += sprintf(page + len, | |
150 | "Adjustment %02d-way: %u %u\n", | |
151 | i, info->adjustment[i-2], | |
152 | ext->alt_adjustment[i-2]); | |
153 | ||
154 | } else { | |
155 | len += sprintf(page + len, "Capability: %u\n", | |
156 | info->capability); | |
157 | for (i = 2; i <= info->cpus_total; i++) | |
158 | len += sprintf(page + len, | |
159 | "Adjustment %02d-way: %u\n", | |
160 | i, info->adjustment[i-2]); | |
161 | } | |
162 | ||
163 | if (info->secondary_capability != 0) | |
164 | len += sprintf(page + len, "Secondary Capability: %d\n", | |
165 | info->secondary_capability); | |
0fee644a | 166 | return len; |
1da177e4 LT |
167 | } |
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 | ||
94f5b09d | 174 | EBCASC(info->name, sizeof(info->name)); |
0fee644a MS |
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++) { | |
94f5b09d HC |
217 | EBCASC(info->vm[i].name, sizeof(info->vm[i].name)); |
218 | EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi)); | |
0fee644a MS |
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 | ||
1da177e4 | 240 | static int proc_read_sysinfo(char *page, char **start, |
94f5b09d HC |
241 | off_t off, int count, |
242 | int *eof, void *data) | |
1da177e4 | 243 | { |
94f5b09d | 244 | unsigned long info = get_zeroed_page(GFP_KERNEL); |
0fee644a | 245 | int level, len; |
94f5b09d | 246 | |
1da177e4 LT |
247 | if (!info) |
248 | return 0; | |
249 | ||
0fee644a MS |
250 | len = 0; |
251 | level = stsi_0(); | |
252 | if (level >= 1) | |
253 | len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len); | |
1da177e4 | 254 | |
0fee644a | 255 | if (level >= 1) |
96f4a70d HC |
256 | len = stsi_15_1_x((struct sysinfo_15_1_x *) info, page, len); |
257 | ||
258 | if (level >= 1) | |
0fee644a | 259 | len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len); |
1da177e4 | 260 | |
0fee644a MS |
261 | if (level >= 2) |
262 | len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len); | |
1da177e4 | 263 | |
0fee644a MS |
264 | if (level >= 3) |
265 | len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len); | |
1da177e4 | 266 | |
94f5b09d HC |
267 | free_page(info); |
268 | return len; | |
1da177e4 LT |
269 | } |
270 | ||
271 | static __init int create_proc_sysinfo(void) | |
272 | { | |
0fee644a MS |
273 | create_proc_read_entry("sysinfo", 0444, NULL, |
274 | proc_read_sysinfo, NULL); | |
1da177e4 LT |
275 | return 0; |
276 | } | |
94f5b09d | 277 | device_initcall(create_proc_sysinfo); |
1da177e4 | 278 | |
6bcac508 MS |
279 | /* |
280 | * Service levels interface. | |
281 | */ | |
282 | ||
283 | static DECLARE_RWSEM(service_level_sem); | |
284 | static LIST_HEAD(service_level_list); | |
285 | ||
286 | int register_service_level(struct service_level *slr) | |
287 | { | |
288 | struct service_level *ptr; | |
289 | ||
290 | down_write(&service_level_sem); | |
291 | list_for_each_entry(ptr, &service_level_list, list) | |
292 | if (ptr == slr) { | |
293 | up_write(&service_level_sem); | |
294 | return -EEXIST; | |
295 | } | |
296 | list_add_tail(&slr->list, &service_level_list); | |
297 | up_write(&service_level_sem); | |
298 | return 0; | |
299 | } | |
300 | EXPORT_SYMBOL(register_service_level); | |
301 | ||
302 | int unregister_service_level(struct service_level *slr) | |
303 | { | |
304 | struct service_level *ptr, *next; | |
305 | int rc = -ENOENT; | |
306 | ||
307 | down_write(&service_level_sem); | |
308 | list_for_each_entry_safe(ptr, next, &service_level_list, list) { | |
309 | if (ptr != slr) | |
310 | continue; | |
311 | list_del(&ptr->list); | |
312 | rc = 0; | |
313 | break; | |
314 | } | |
315 | up_write(&service_level_sem); | |
316 | return rc; | |
317 | } | |
318 | EXPORT_SYMBOL(unregister_service_level); | |
319 | ||
320 | static void *service_level_start(struct seq_file *m, loff_t *pos) | |
321 | { | |
322 | down_read(&service_level_sem); | |
323 | return seq_list_start(&service_level_list, *pos); | |
324 | } | |
325 | ||
326 | static void *service_level_next(struct seq_file *m, void *p, loff_t *pos) | |
327 | { | |
328 | return seq_list_next(p, &service_level_list, pos); | |
329 | } | |
330 | ||
331 | static void service_level_stop(struct seq_file *m, void *p) | |
332 | { | |
333 | up_read(&service_level_sem); | |
334 | } | |
335 | ||
336 | static int service_level_show(struct seq_file *m, void *p) | |
337 | { | |
338 | struct service_level *slr; | |
339 | ||
340 | slr = list_entry(p, struct service_level, list); | |
341 | slr->seq_print(m, slr); | |
342 | return 0; | |
343 | } | |
344 | ||
345 | static const struct seq_operations service_level_seq_ops = { | |
346 | .start = service_level_start, | |
347 | .next = service_level_next, | |
348 | .stop = service_level_stop, | |
349 | .show = service_level_show | |
350 | }; | |
351 | ||
352 | static int service_level_open(struct inode *inode, struct file *file) | |
353 | { | |
354 | return seq_open(file, &service_level_seq_ops); | |
355 | } | |
356 | ||
357 | static const struct file_operations service_level_ops = { | |
358 | .open = service_level_open, | |
359 | .read = seq_read, | |
360 | .llseek = seq_lseek, | |
361 | .release = seq_release | |
362 | }; | |
363 | ||
364 | static void service_level_vm_print(struct seq_file *m, | |
365 | struct service_level *slr) | |
366 | { | |
367 | char *query_buffer, *str; | |
368 | ||
369 | query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA); | |
370 | if (!query_buffer) | |
371 | return; | |
372 | cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL); | |
373 | str = strchr(query_buffer, '\n'); | |
374 | if (str) | |
375 | *str = 0; | |
376 | seq_printf(m, "VM: %s\n", query_buffer); | |
377 | kfree(query_buffer); | |
378 | } | |
379 | ||
380 | static struct service_level service_level_vm = { | |
381 | .seq_print = service_level_vm_print | |
382 | }; | |
383 | ||
384 | static __init int create_proc_service_level(void) | |
385 | { | |
386 | proc_create("service_levels", 0, NULL, &service_level_ops); | |
387 | if (MACHINE_IS_VM) | |
388 | register_service_level(&service_level_vm); | |
389 | return 0; | |
390 | } | |
6bcac508 MS |
391 | subsys_initcall(create_proc_service_level); |
392 | ||
393 | /* | |
394 | * Bogomips calculation based on cpu capability. | |
395 | */ | |
2fc2d1e9 HC |
396 | int get_cpu_capability(unsigned int *capability) |
397 | { | |
398 | struct sysinfo_1_2_2 *info; | |
399 | int rc; | |
400 | ||
401 | info = (void *) get_zeroed_page(GFP_KERNEL); | |
402 | if (!info) | |
403 | return -ENOMEM; | |
404 | rc = stsi(info, 1, 2, 2); | |
405 | if (rc == -ENOSYS) | |
406 | goto out; | |
407 | rc = 0; | |
408 | *capability = info->capability; | |
409 | out: | |
410 | free_page((unsigned long) info); | |
411 | return rc; | |
412 | } | |
413 | ||
31ee4b2f MS |
414 | /* |
415 | * CPU capability might have changed. Therefore recalculate loops_per_jiffy. | |
416 | */ | |
417 | void s390_adjust_jiffies(void) | |
418 | { | |
419 | struct sysinfo_1_2_2 *info; | |
420 | const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */ | |
421 | FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR); | |
422 | FP_DECL_EX; | |
423 | unsigned int capability; | |
424 | ||
425 | info = (void *) get_zeroed_page(GFP_KERNEL); | |
426 | if (!info) | |
427 | return; | |
428 | ||
429 | if (stsi(info, 1, 2, 2) != -ENOSYS) { | |
430 | /* | |
431 | * Major sigh. The cpu capability encoding is "special". | |
432 | * If the first 9 bits of info->capability are 0 then it | |
433 | * is a 32 bit unsigned integer in the range 0 .. 2^23. | |
434 | * If the first 9 bits are != 0 then it is a 32 bit float. | |
435 | * In addition a lower value indicates a proportionally | |
436 | * higher cpu capacity. Bogomips are the other way round. | |
437 | * To get to a halfway suitable number we divide 1e7 | |
438 | * by the cpu capability number. Yes, that means a floating | |
439 | * point division .. math-emu here we come :-) | |
440 | */ | |
441 | FP_UNPACK_SP(SA, &fmil); | |
442 | if ((info->capability >> 23) == 0) | |
443 | FP_FROM_INT_S(SB, info->capability, 32, int); | |
444 | else | |
445 | FP_UNPACK_SP(SB, &info->capability); | |
446 | FP_DIV_S(SR, SA, SB); | |
447 | FP_TO_INT_S(capability, SR, 32, 0); | |
448 | } else | |
449 | /* | |
450 | * Really old machine without stsi block for basic | |
451 | * cpu information. Report 42.0 bogomips. | |
452 | */ | |
453 | capability = 42; | |
454 | loops_per_jiffy = capability * (500000/HZ); | |
455 | free_page((unsigned long) info); | |
456 | } | |
457 | ||
458 | /* | |
459 | * calibrate the delay loop | |
460 | */ | |
6c81c32f | 461 | void __cpuinit calibrate_delay(void) |
31ee4b2f MS |
462 | { |
463 | s390_adjust_jiffies(); | |
464 | /* Print the good old Bogomips line .. */ | |
465 | printk(KERN_DEBUG "Calibrating delay loop (skipped)... " | |
466 | "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ), | |
467 | (loops_per_jiffy/(5000/HZ)) % 100); | |
468 | } |