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> |
1da177e4 | 18 | |
31ee4b2f MS |
19 | /* Sigh, math-emu. Don't ask. */ |
20 | #include <asm/sfp-util.h> | |
21 | #include <math-emu/soft-fp.h> | |
22 | #include <math-emu/single.h> | |
23 | ||
0fee644a | 24 | static inline int stsi_0(void) |
1da177e4 | 25 | { |
94f5b09d | 26 | int rc = stsi(NULL, 0, 0, 0); |
0fee644a | 27 | return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28); |
1da177e4 LT |
28 | } |
29 | ||
0fee644a | 30 | static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len) |
1da177e4 | 31 | { |
0fee644a MS |
32 | if (stsi(info, 1, 1, 1) == -ENOSYS) |
33 | return len; | |
34 | ||
35 | EBCASC(info->manufacturer, sizeof(info->manufacturer)); | |
36 | EBCASC(info->type, sizeof(info->type)); | |
37 | EBCASC(info->model, sizeof(info->model)); | |
38 | EBCASC(info->sequence, sizeof(info->sequence)); | |
39 | EBCASC(info->plant, sizeof(info->plant)); | |
40 | EBCASC(info->model_capacity, sizeof(info->model_capacity)); | |
cbce70e6 MS |
41 | EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap)); |
42 | EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap)); | |
0fee644a MS |
43 | len += sprintf(page + len, "Manufacturer: %-16.16s\n", |
44 | info->manufacturer); | |
45 | len += sprintf(page + len, "Type: %-4.4s\n", | |
46 | info->type); | |
47 | if (info->model[0] != '\0') | |
48 | /* | |
49 | * Sigh: the model field has been renamed with System z9 | |
50 | * to model_capacity and a new model field has been added | |
51 | * after the plant field. To avoid confusing older programs | |
52 | * the "Model:" prints "model_capacity model" or just | |
53 | * "model_capacity" if the model string is empty . | |
54 | */ | |
55 | len += sprintf(page + len, | |
56 | "Model: %-16.16s %-16.16s\n", | |
57 | info->model_capacity, info->model); | |
58 | else | |
59 | len += sprintf(page + len, "Model: %-16.16s\n", | |
60 | info->model_capacity); | |
61 | len += sprintf(page + len, "Sequence Code: %-16.16s\n", | |
62 | info->sequence); | |
63 | len += sprintf(page + len, "Plant: %-4.4s\n", | |
64 | info->plant); | |
cbce70e6 MS |
65 | len += sprintf(page + len, "Model Capacity: %-16.16s %08u\n", |
66 | info->model_capacity, *(u32 *) info->model_cap_rating); | |
67 | if (info->model_perm_cap[0] != '\0') | |
68 | len += sprintf(page + len, | |
69 | "Model Perm. Capacity: %-16.16s %08u\n", | |
70 | info->model_perm_cap, | |
71 | *(u32 *) info->model_perm_cap_rating); | |
72 | if (info->model_temp_cap[0] != '\0') | |
73 | len += sprintf(page + len, | |
74 | "Model Temp. Capacity: %-16.16s %08u\n", | |
75 | info->model_temp_cap, | |
76 | *(u32 *) info->model_temp_cap_rating); | |
0fee644a | 77 | return len; |
1da177e4 LT |
78 | } |
79 | ||
0fee644a | 80 | static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len) |
1da177e4 | 81 | { |
0fee644a MS |
82 | struct sysinfo_1_2_2_extension *ext; |
83 | int i; | |
84 | ||
85 | if (stsi(info, 1, 2, 2) == -ENOSYS) | |
86 | return len; | |
87 | ext = (struct sysinfo_1_2_2_extension *) | |
88 | ((unsigned long) info + info->acc_offset); | |
89 | ||
90 | len += sprintf(page + len, "\n"); | |
91 | len += sprintf(page + len, "CPUs Total: %d\n", | |
92 | info->cpus_total); | |
93 | len += sprintf(page + len, "CPUs Configured: %d\n", | |
94 | info->cpus_configured); | |
95 | len += sprintf(page + len, "CPUs Standby: %d\n", | |
96 | info->cpus_standby); | |
97 | len += sprintf(page + len, "CPUs Reserved: %d\n", | |
98 | info->cpus_reserved); | |
99 | ||
100 | if (info->format == 1) { | |
101 | /* | |
102 | * Sigh 2. According to the specification the alternate | |
103 | * capability field is a 32 bit floating point number | |
104 | * if the higher order 8 bits are not zero. Printing | |
105 | * a floating point number in the kernel is a no-no, | |
106 | * always print the number as 32 bit unsigned integer. | |
31ee4b2f | 107 | * The user-space needs to know about the strange |
0fee644a MS |
108 | * encoding of the alternate cpu capability. |
109 | */ | |
110 | len += sprintf(page + len, "Capability: %u %u\n", | |
111 | info->capability, ext->alt_capability); | |
112 | for (i = 2; i <= info->cpus_total; i++) | |
113 | len += sprintf(page + len, | |
114 | "Adjustment %02d-way: %u %u\n", | |
115 | i, info->adjustment[i-2], | |
116 | ext->alt_adjustment[i-2]); | |
117 | ||
118 | } else { | |
119 | len += sprintf(page + len, "Capability: %u\n", | |
120 | info->capability); | |
121 | for (i = 2; i <= info->cpus_total; i++) | |
122 | len += sprintf(page + len, | |
123 | "Adjustment %02d-way: %u\n", | |
124 | i, info->adjustment[i-2]); | |
125 | } | |
126 | ||
127 | if (info->secondary_capability != 0) | |
128 | len += sprintf(page + len, "Secondary Capability: %d\n", | |
129 | info->secondary_capability); | |
0fee644a | 130 | return len; |
1da177e4 LT |
131 | } |
132 | ||
0fee644a | 133 | static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len) |
1da177e4 | 134 | { |
0fee644a MS |
135 | if (stsi(info, 2, 2, 2) == -ENOSYS) |
136 | return len; | |
137 | ||
94f5b09d | 138 | EBCASC(info->name, sizeof(info->name)); |
0fee644a MS |
139 | |
140 | len += sprintf(page + len, "\n"); | |
141 | len += sprintf(page + len, "LPAR Number: %d\n", | |
142 | info->lpar_number); | |
143 | ||
144 | len += sprintf(page + len, "LPAR Characteristics: "); | |
145 | if (info->characteristics & LPAR_CHAR_DEDICATED) | |
146 | len += sprintf(page + len, "Dedicated "); | |
147 | if (info->characteristics & LPAR_CHAR_SHARED) | |
148 | len += sprintf(page + len, "Shared "); | |
149 | if (info->characteristics & LPAR_CHAR_LIMITED) | |
150 | len += sprintf(page + len, "Limited "); | |
151 | len += sprintf(page + len, "\n"); | |
152 | ||
153 | len += sprintf(page + len, "LPAR Name: %-8.8s\n", | |
154 | info->name); | |
155 | ||
156 | len += sprintf(page + len, "LPAR Adjustment: %d\n", | |
157 | info->caf); | |
158 | ||
159 | len += sprintf(page + len, "LPAR CPUs Total: %d\n", | |
160 | info->cpus_total); | |
161 | len += sprintf(page + len, "LPAR CPUs Configured: %d\n", | |
162 | info->cpus_configured); | |
163 | len += sprintf(page + len, "LPAR CPUs Standby: %d\n", | |
164 | info->cpus_standby); | |
165 | len += sprintf(page + len, "LPAR CPUs Reserved: %d\n", | |
166 | info->cpus_reserved); | |
167 | len += sprintf(page + len, "LPAR CPUs Dedicated: %d\n", | |
168 | info->cpus_dedicated); | |
169 | len += sprintf(page + len, "LPAR CPUs Shared: %d\n", | |
170 | info->cpus_shared); | |
171 | return len; | |
1da177e4 LT |
172 | } |
173 | ||
0fee644a | 174 | static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len) |
1da177e4 | 175 | { |
0fee644a MS |
176 | int i; |
177 | ||
178 | if (stsi(info, 3, 2, 2) == -ENOSYS) | |
179 | return len; | |
180 | for (i = 0; i < info->count; i++) { | |
94f5b09d HC |
181 | EBCASC(info->vm[i].name, sizeof(info->vm[i].name)); |
182 | EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi)); | |
0fee644a MS |
183 | len += sprintf(page + len, "\n"); |
184 | len += sprintf(page + len, "VM%02d Name: %-8.8s\n", | |
185 | i, info->vm[i].name); | |
186 | len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n", | |
187 | i, info->vm[i].cpi); | |
188 | ||
189 | len += sprintf(page + len, "VM%02d Adjustment: %d\n", | |
190 | i, info->vm[i].caf); | |
191 | ||
192 | len += sprintf(page + len, "VM%02d CPUs Total: %d\n", | |
193 | i, info->vm[i].cpus_total); | |
194 | len += sprintf(page + len, "VM%02d CPUs Configured: %d\n", | |
195 | i, info->vm[i].cpus_configured); | |
196 | len += sprintf(page + len, "VM%02d CPUs Standby: %d\n", | |
197 | i, info->vm[i].cpus_standby); | |
198 | len += sprintf(page + len, "VM%02d CPUs Reserved: %d\n", | |
199 | i, info->vm[i].cpus_reserved); | |
1da177e4 | 200 | } |
0fee644a | 201 | return len; |
1da177e4 LT |
202 | } |
203 | ||
1da177e4 | 204 | static int proc_read_sysinfo(char *page, char **start, |
94f5b09d HC |
205 | off_t off, int count, |
206 | int *eof, void *data) | |
1da177e4 | 207 | { |
94f5b09d | 208 | unsigned long info = get_zeroed_page(GFP_KERNEL); |
0fee644a | 209 | int level, len; |
94f5b09d | 210 | |
1da177e4 LT |
211 | if (!info) |
212 | return 0; | |
213 | ||
0fee644a MS |
214 | len = 0; |
215 | level = stsi_0(); | |
216 | if (level >= 1) | |
217 | len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len); | |
1da177e4 | 218 | |
0fee644a MS |
219 | if (level >= 1) |
220 | len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len); | |
1da177e4 | 221 | |
0fee644a MS |
222 | if (level >= 2) |
223 | len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len); | |
1da177e4 | 224 | |
0fee644a MS |
225 | if (level >= 3) |
226 | len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len); | |
1da177e4 | 227 | |
94f5b09d HC |
228 | free_page(info); |
229 | return len; | |
1da177e4 LT |
230 | } |
231 | ||
232 | static __init int create_proc_sysinfo(void) | |
233 | { | |
0fee644a MS |
234 | create_proc_read_entry("sysinfo", 0444, NULL, |
235 | proc_read_sysinfo, NULL); | |
1da177e4 LT |
236 | return 0; |
237 | } | |
94f5b09d | 238 | device_initcall(create_proc_sysinfo); |
1da177e4 | 239 | |
6bcac508 MS |
240 | /* |
241 | * Service levels interface. | |
242 | */ | |
243 | ||
244 | static DECLARE_RWSEM(service_level_sem); | |
245 | static LIST_HEAD(service_level_list); | |
246 | ||
247 | int register_service_level(struct service_level *slr) | |
248 | { | |
249 | struct service_level *ptr; | |
250 | ||
251 | down_write(&service_level_sem); | |
252 | list_for_each_entry(ptr, &service_level_list, list) | |
253 | if (ptr == slr) { | |
254 | up_write(&service_level_sem); | |
255 | return -EEXIST; | |
256 | } | |
257 | list_add_tail(&slr->list, &service_level_list); | |
258 | up_write(&service_level_sem); | |
259 | return 0; | |
260 | } | |
261 | EXPORT_SYMBOL(register_service_level); | |
262 | ||
263 | int unregister_service_level(struct service_level *slr) | |
264 | { | |
265 | struct service_level *ptr, *next; | |
266 | int rc = -ENOENT; | |
267 | ||
268 | down_write(&service_level_sem); | |
269 | list_for_each_entry_safe(ptr, next, &service_level_list, list) { | |
270 | if (ptr != slr) | |
271 | continue; | |
272 | list_del(&ptr->list); | |
273 | rc = 0; | |
274 | break; | |
275 | } | |
276 | up_write(&service_level_sem); | |
277 | return rc; | |
278 | } | |
279 | EXPORT_SYMBOL(unregister_service_level); | |
280 | ||
281 | static void *service_level_start(struct seq_file *m, loff_t *pos) | |
282 | { | |
283 | down_read(&service_level_sem); | |
284 | return seq_list_start(&service_level_list, *pos); | |
285 | } | |
286 | ||
287 | static void *service_level_next(struct seq_file *m, void *p, loff_t *pos) | |
288 | { | |
289 | return seq_list_next(p, &service_level_list, pos); | |
290 | } | |
291 | ||
292 | static void service_level_stop(struct seq_file *m, void *p) | |
293 | { | |
294 | up_read(&service_level_sem); | |
295 | } | |
296 | ||
297 | static int service_level_show(struct seq_file *m, void *p) | |
298 | { | |
299 | struct service_level *slr; | |
300 | ||
301 | slr = list_entry(p, struct service_level, list); | |
302 | slr->seq_print(m, slr); | |
303 | return 0; | |
304 | } | |
305 | ||
306 | static const struct seq_operations service_level_seq_ops = { | |
307 | .start = service_level_start, | |
308 | .next = service_level_next, | |
309 | .stop = service_level_stop, | |
310 | .show = service_level_show | |
311 | }; | |
312 | ||
313 | static int service_level_open(struct inode *inode, struct file *file) | |
314 | { | |
315 | return seq_open(file, &service_level_seq_ops); | |
316 | } | |
317 | ||
318 | static const struct file_operations service_level_ops = { | |
319 | .open = service_level_open, | |
320 | .read = seq_read, | |
321 | .llseek = seq_lseek, | |
322 | .release = seq_release | |
323 | }; | |
324 | ||
325 | static void service_level_vm_print(struct seq_file *m, | |
326 | struct service_level *slr) | |
327 | { | |
328 | char *query_buffer, *str; | |
329 | ||
330 | query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA); | |
331 | if (!query_buffer) | |
332 | return; | |
333 | cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL); | |
334 | str = strchr(query_buffer, '\n'); | |
335 | if (str) | |
336 | *str = 0; | |
337 | seq_printf(m, "VM: %s\n", query_buffer); | |
338 | kfree(query_buffer); | |
339 | } | |
340 | ||
341 | static struct service_level service_level_vm = { | |
342 | .seq_print = service_level_vm_print | |
343 | }; | |
344 | ||
345 | static __init int create_proc_service_level(void) | |
346 | { | |
347 | proc_create("service_levels", 0, NULL, &service_level_ops); | |
348 | if (MACHINE_IS_VM) | |
349 | register_service_level(&service_level_vm); | |
350 | return 0; | |
351 | } | |
6bcac508 MS |
352 | subsys_initcall(create_proc_service_level); |
353 | ||
354 | /* | |
355 | * Bogomips calculation based on cpu capability. | |
356 | */ | |
2fc2d1e9 HC |
357 | int get_cpu_capability(unsigned int *capability) |
358 | { | |
359 | struct sysinfo_1_2_2 *info; | |
360 | int rc; | |
361 | ||
362 | info = (void *) get_zeroed_page(GFP_KERNEL); | |
363 | if (!info) | |
364 | return -ENOMEM; | |
365 | rc = stsi(info, 1, 2, 2); | |
366 | if (rc == -ENOSYS) | |
367 | goto out; | |
368 | rc = 0; | |
369 | *capability = info->capability; | |
370 | out: | |
371 | free_page((unsigned long) info); | |
372 | return rc; | |
373 | } | |
374 | ||
31ee4b2f MS |
375 | /* |
376 | * CPU capability might have changed. Therefore recalculate loops_per_jiffy. | |
377 | */ | |
378 | void s390_adjust_jiffies(void) | |
379 | { | |
380 | struct sysinfo_1_2_2 *info; | |
381 | const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */ | |
382 | FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR); | |
383 | FP_DECL_EX; | |
384 | unsigned int capability; | |
385 | ||
386 | info = (void *) get_zeroed_page(GFP_KERNEL); | |
387 | if (!info) | |
388 | return; | |
389 | ||
390 | if (stsi(info, 1, 2, 2) != -ENOSYS) { | |
391 | /* | |
392 | * Major sigh. The cpu capability encoding is "special". | |
393 | * If the first 9 bits of info->capability are 0 then it | |
394 | * is a 32 bit unsigned integer in the range 0 .. 2^23. | |
395 | * If the first 9 bits are != 0 then it is a 32 bit float. | |
396 | * In addition a lower value indicates a proportionally | |
397 | * higher cpu capacity. Bogomips are the other way round. | |
398 | * To get to a halfway suitable number we divide 1e7 | |
399 | * by the cpu capability number. Yes, that means a floating | |
400 | * point division .. math-emu here we come :-) | |
401 | */ | |
402 | FP_UNPACK_SP(SA, &fmil); | |
403 | if ((info->capability >> 23) == 0) | |
404 | FP_FROM_INT_S(SB, info->capability, 32, int); | |
405 | else | |
406 | FP_UNPACK_SP(SB, &info->capability); | |
407 | FP_DIV_S(SR, SA, SB); | |
408 | FP_TO_INT_S(capability, SR, 32, 0); | |
409 | } else | |
410 | /* | |
411 | * Really old machine without stsi block for basic | |
412 | * cpu information. Report 42.0 bogomips. | |
413 | */ | |
414 | capability = 42; | |
415 | loops_per_jiffy = capability * (500000/HZ); | |
416 | free_page((unsigned long) info); | |
417 | } | |
418 | ||
419 | /* | |
420 | * calibrate the delay loop | |
421 | */ | |
6c81c32f | 422 | void __cpuinit calibrate_delay(void) |
31ee4b2f MS |
423 | { |
424 | s390_adjust_jiffies(); | |
425 | /* Print the good old Bogomips line .. */ | |
426 | printk(KERN_DEBUG "Calibrating delay loop (skipped)... " | |
427 | "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ), | |
428 | (loops_per_jiffy/(5000/HZ)) % 100); | |
429 | } |