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> |
1da177e4 | 14 | #include <asm/ebcdic.h> |
aa24f7f0 | 15 | #include <asm/sysinfo.h> |
6bcac508 | 16 | #include <asm/cpcmd.h> |
1da177e4 | 17 | |
31ee4b2f MS |
18 | /* Sigh, math-emu. Don't ask. */ |
19 | #include <asm/sfp-util.h> | |
20 | #include <math-emu/soft-fp.h> | |
21 | #include <math-emu/single.h> | |
22 | ||
0fee644a | 23 | static inline int stsi_0(void) |
1da177e4 | 24 | { |
94f5b09d | 25 | int rc = stsi(NULL, 0, 0, 0); |
0fee644a | 26 | return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28); |
1da177e4 LT |
27 | } |
28 | ||
0fee644a | 29 | static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len) |
1da177e4 | 30 | { |
0fee644a MS |
31 | if (stsi(info, 1, 1, 1) == -ENOSYS) |
32 | return len; | |
33 | ||
34 | EBCASC(info->manufacturer, sizeof(info->manufacturer)); | |
35 | EBCASC(info->type, sizeof(info->type)); | |
36 | EBCASC(info->model, sizeof(info->model)); | |
37 | EBCASC(info->sequence, sizeof(info->sequence)); | |
38 | EBCASC(info->plant, sizeof(info->plant)); | |
39 | EBCASC(info->model_capacity, sizeof(info->model_capacity)); | |
cbce70e6 MS |
40 | EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap)); |
41 | EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap)); | |
0fee644a MS |
42 | len += sprintf(page + len, "Manufacturer: %-16.16s\n", |
43 | info->manufacturer); | |
44 | len += sprintf(page + len, "Type: %-4.4s\n", | |
45 | info->type); | |
46 | if (info->model[0] != '\0') | |
47 | /* | |
48 | * Sigh: the model field has been renamed with System z9 | |
49 | * to model_capacity and a new model field has been added | |
50 | * after the plant field. To avoid confusing older programs | |
51 | * the "Model:" prints "model_capacity model" or just | |
52 | * "model_capacity" if the model string is empty . | |
53 | */ | |
54 | len += sprintf(page + len, | |
55 | "Model: %-16.16s %-16.16s\n", | |
56 | info->model_capacity, info->model); | |
57 | else | |
58 | len += sprintf(page + len, "Model: %-16.16s\n", | |
59 | info->model_capacity); | |
60 | len += sprintf(page + len, "Sequence Code: %-16.16s\n", | |
61 | info->sequence); | |
62 | len += sprintf(page + len, "Plant: %-4.4s\n", | |
63 | info->plant); | |
cbce70e6 MS |
64 | len += sprintf(page + len, "Model Capacity: %-16.16s %08u\n", |
65 | info->model_capacity, *(u32 *) info->model_cap_rating); | |
66 | if (info->model_perm_cap[0] != '\0') | |
67 | len += sprintf(page + len, | |
68 | "Model Perm. Capacity: %-16.16s %08u\n", | |
69 | info->model_perm_cap, | |
70 | *(u32 *) info->model_perm_cap_rating); | |
71 | if (info->model_temp_cap[0] != '\0') | |
72 | len += sprintf(page + len, | |
73 | "Model Temp. Capacity: %-16.16s %08u\n", | |
74 | info->model_temp_cap, | |
75 | *(u32 *) info->model_temp_cap_rating); | |
0fee644a | 76 | return len; |
1da177e4 LT |
77 | } |
78 | ||
0fee644a | 79 | static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len) |
1da177e4 | 80 | { |
0fee644a MS |
81 | struct sysinfo_1_2_2_extension *ext; |
82 | int i; | |
83 | ||
84 | if (stsi(info, 1, 2, 2) == -ENOSYS) | |
85 | return len; | |
86 | ext = (struct sysinfo_1_2_2_extension *) | |
87 | ((unsigned long) info + info->acc_offset); | |
88 | ||
89 | len += sprintf(page + len, "\n"); | |
90 | len += sprintf(page + len, "CPUs Total: %d\n", | |
91 | info->cpus_total); | |
92 | len += sprintf(page + len, "CPUs Configured: %d\n", | |
93 | info->cpus_configured); | |
94 | len += sprintf(page + len, "CPUs Standby: %d\n", | |
95 | info->cpus_standby); | |
96 | len += sprintf(page + len, "CPUs Reserved: %d\n", | |
97 | info->cpus_reserved); | |
98 | ||
99 | if (info->format == 1) { | |
100 | /* | |
101 | * Sigh 2. According to the specification the alternate | |
102 | * capability field is a 32 bit floating point number | |
103 | * if the higher order 8 bits are not zero. Printing | |
104 | * a floating point number in the kernel is a no-no, | |
105 | * always print the number as 32 bit unsigned integer. | |
31ee4b2f | 106 | * The user-space needs to know about the strange |
0fee644a MS |
107 | * encoding of the alternate cpu capability. |
108 | */ | |
109 | len += sprintf(page + len, "Capability: %u %u\n", | |
110 | info->capability, ext->alt_capability); | |
111 | for (i = 2; i <= info->cpus_total; i++) | |
112 | len += sprintf(page + len, | |
113 | "Adjustment %02d-way: %u %u\n", | |
114 | i, info->adjustment[i-2], | |
115 | ext->alt_adjustment[i-2]); | |
116 | ||
117 | } else { | |
118 | len += sprintf(page + len, "Capability: %u\n", | |
119 | info->capability); | |
120 | for (i = 2; i <= info->cpus_total; i++) | |
121 | len += sprintf(page + len, | |
122 | "Adjustment %02d-way: %u\n", | |
123 | i, info->adjustment[i-2]); | |
124 | } | |
125 | ||
126 | if (info->secondary_capability != 0) | |
127 | len += sprintf(page + len, "Secondary Capability: %d\n", | |
128 | info->secondary_capability); | |
0fee644a | 129 | return len; |
1da177e4 LT |
130 | } |
131 | ||
0fee644a | 132 | static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len) |
1da177e4 | 133 | { |
0fee644a MS |
134 | if (stsi(info, 2, 2, 2) == -ENOSYS) |
135 | return len; | |
136 | ||
94f5b09d | 137 | EBCASC(info->name, sizeof(info->name)); |
0fee644a MS |
138 | |
139 | len += sprintf(page + len, "\n"); | |
140 | len += sprintf(page + len, "LPAR Number: %d\n", | |
141 | info->lpar_number); | |
142 | ||
143 | len += sprintf(page + len, "LPAR Characteristics: "); | |
144 | if (info->characteristics & LPAR_CHAR_DEDICATED) | |
145 | len += sprintf(page + len, "Dedicated "); | |
146 | if (info->characteristics & LPAR_CHAR_SHARED) | |
147 | len += sprintf(page + len, "Shared "); | |
148 | if (info->characteristics & LPAR_CHAR_LIMITED) | |
149 | len += sprintf(page + len, "Limited "); | |
150 | len += sprintf(page + len, "\n"); | |
151 | ||
152 | len += sprintf(page + len, "LPAR Name: %-8.8s\n", | |
153 | info->name); | |
154 | ||
155 | len += sprintf(page + len, "LPAR Adjustment: %d\n", | |
156 | info->caf); | |
157 | ||
158 | len += sprintf(page + len, "LPAR CPUs Total: %d\n", | |
159 | info->cpus_total); | |
160 | len += sprintf(page + len, "LPAR CPUs Configured: %d\n", | |
161 | info->cpus_configured); | |
162 | len += sprintf(page + len, "LPAR CPUs Standby: %d\n", | |
163 | info->cpus_standby); | |
164 | len += sprintf(page + len, "LPAR CPUs Reserved: %d\n", | |
165 | info->cpus_reserved); | |
166 | len += sprintf(page + len, "LPAR CPUs Dedicated: %d\n", | |
167 | info->cpus_dedicated); | |
168 | len += sprintf(page + len, "LPAR CPUs Shared: %d\n", | |
169 | info->cpus_shared); | |
170 | return len; | |
1da177e4 LT |
171 | } |
172 | ||
0fee644a | 173 | static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len) |
1da177e4 | 174 | { |
0fee644a MS |
175 | int i; |
176 | ||
177 | if (stsi(info, 3, 2, 2) == -ENOSYS) | |
178 | return len; | |
179 | for (i = 0; i < info->count; i++) { | |
94f5b09d HC |
180 | EBCASC(info->vm[i].name, sizeof(info->vm[i].name)); |
181 | EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi)); | |
0fee644a MS |
182 | len += sprintf(page + len, "\n"); |
183 | len += sprintf(page + len, "VM%02d Name: %-8.8s\n", | |
184 | i, info->vm[i].name); | |
185 | len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n", | |
186 | i, info->vm[i].cpi); | |
187 | ||
188 | len += sprintf(page + len, "VM%02d Adjustment: %d\n", | |
189 | i, info->vm[i].caf); | |
190 | ||
191 | len += sprintf(page + len, "VM%02d CPUs Total: %d\n", | |
192 | i, info->vm[i].cpus_total); | |
193 | len += sprintf(page + len, "VM%02d CPUs Configured: %d\n", | |
194 | i, info->vm[i].cpus_configured); | |
195 | len += sprintf(page + len, "VM%02d CPUs Standby: %d\n", | |
196 | i, info->vm[i].cpus_standby); | |
197 | len += sprintf(page + len, "VM%02d CPUs Reserved: %d\n", | |
198 | i, info->vm[i].cpus_reserved); | |
1da177e4 | 199 | } |
0fee644a | 200 | return len; |
1da177e4 LT |
201 | } |
202 | ||
1da177e4 | 203 | static int proc_read_sysinfo(char *page, char **start, |
94f5b09d HC |
204 | off_t off, int count, |
205 | int *eof, void *data) | |
1da177e4 | 206 | { |
94f5b09d | 207 | unsigned long info = get_zeroed_page(GFP_KERNEL); |
0fee644a | 208 | int level, len; |
94f5b09d | 209 | |
1da177e4 LT |
210 | if (!info) |
211 | return 0; | |
212 | ||
0fee644a MS |
213 | len = 0; |
214 | level = stsi_0(); | |
215 | if (level >= 1) | |
216 | len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len); | |
1da177e4 | 217 | |
0fee644a MS |
218 | if (level >= 1) |
219 | len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len); | |
1da177e4 | 220 | |
0fee644a MS |
221 | if (level >= 2) |
222 | len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len); | |
1da177e4 | 223 | |
0fee644a MS |
224 | if (level >= 3) |
225 | len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len); | |
1da177e4 | 226 | |
94f5b09d HC |
227 | free_page(info); |
228 | return len; | |
1da177e4 LT |
229 | } |
230 | ||
231 | static __init int create_proc_sysinfo(void) | |
232 | { | |
0fee644a MS |
233 | create_proc_read_entry("sysinfo", 0444, NULL, |
234 | proc_read_sysinfo, NULL); | |
1da177e4 LT |
235 | return 0; |
236 | } | |
94f5b09d | 237 | device_initcall(create_proc_sysinfo); |
1da177e4 | 238 | |
6bcac508 MS |
239 | /* |
240 | * Service levels interface. | |
241 | */ | |
242 | ||
243 | static DECLARE_RWSEM(service_level_sem); | |
244 | static LIST_HEAD(service_level_list); | |
245 | ||
246 | int register_service_level(struct service_level *slr) | |
247 | { | |
248 | struct service_level *ptr; | |
249 | ||
250 | down_write(&service_level_sem); | |
251 | list_for_each_entry(ptr, &service_level_list, list) | |
252 | if (ptr == slr) { | |
253 | up_write(&service_level_sem); | |
254 | return -EEXIST; | |
255 | } | |
256 | list_add_tail(&slr->list, &service_level_list); | |
257 | up_write(&service_level_sem); | |
258 | return 0; | |
259 | } | |
260 | EXPORT_SYMBOL(register_service_level); | |
261 | ||
262 | int unregister_service_level(struct service_level *slr) | |
263 | { | |
264 | struct service_level *ptr, *next; | |
265 | int rc = -ENOENT; | |
266 | ||
267 | down_write(&service_level_sem); | |
268 | list_for_each_entry_safe(ptr, next, &service_level_list, list) { | |
269 | if (ptr != slr) | |
270 | continue; | |
271 | list_del(&ptr->list); | |
272 | rc = 0; | |
273 | break; | |
274 | } | |
275 | up_write(&service_level_sem); | |
276 | return rc; | |
277 | } | |
278 | EXPORT_SYMBOL(unregister_service_level); | |
279 | ||
280 | static void *service_level_start(struct seq_file *m, loff_t *pos) | |
281 | { | |
282 | down_read(&service_level_sem); | |
283 | return seq_list_start(&service_level_list, *pos); | |
284 | } | |
285 | ||
286 | static void *service_level_next(struct seq_file *m, void *p, loff_t *pos) | |
287 | { | |
288 | return seq_list_next(p, &service_level_list, pos); | |
289 | } | |
290 | ||
291 | static void service_level_stop(struct seq_file *m, void *p) | |
292 | { | |
293 | up_read(&service_level_sem); | |
294 | } | |
295 | ||
296 | static int service_level_show(struct seq_file *m, void *p) | |
297 | { | |
298 | struct service_level *slr; | |
299 | ||
300 | slr = list_entry(p, struct service_level, list); | |
301 | slr->seq_print(m, slr); | |
302 | return 0; | |
303 | } | |
304 | ||
305 | static const struct seq_operations service_level_seq_ops = { | |
306 | .start = service_level_start, | |
307 | .next = service_level_next, | |
308 | .stop = service_level_stop, | |
309 | .show = service_level_show | |
310 | }; | |
311 | ||
312 | static int service_level_open(struct inode *inode, struct file *file) | |
313 | { | |
314 | return seq_open(file, &service_level_seq_ops); | |
315 | } | |
316 | ||
317 | static const struct file_operations service_level_ops = { | |
318 | .open = service_level_open, | |
319 | .read = seq_read, | |
320 | .llseek = seq_lseek, | |
321 | .release = seq_release | |
322 | }; | |
323 | ||
324 | static void service_level_vm_print(struct seq_file *m, | |
325 | struct service_level *slr) | |
326 | { | |
327 | char *query_buffer, *str; | |
328 | ||
329 | query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA); | |
330 | if (!query_buffer) | |
331 | return; | |
332 | cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL); | |
333 | str = strchr(query_buffer, '\n'); | |
334 | if (str) | |
335 | *str = 0; | |
336 | seq_printf(m, "VM: %s\n", query_buffer); | |
337 | kfree(query_buffer); | |
338 | } | |
339 | ||
340 | static struct service_level service_level_vm = { | |
341 | .seq_print = service_level_vm_print | |
342 | }; | |
343 | ||
344 | static __init int create_proc_service_level(void) | |
345 | { | |
346 | proc_create("service_levels", 0, NULL, &service_level_ops); | |
347 | if (MACHINE_IS_VM) | |
348 | register_service_level(&service_level_vm); | |
349 | return 0; | |
350 | } | |
6bcac508 MS |
351 | subsys_initcall(create_proc_service_level); |
352 | ||
353 | /* | |
354 | * Bogomips calculation based on cpu capability. | |
355 | */ | |
2fc2d1e9 HC |
356 | int get_cpu_capability(unsigned int *capability) |
357 | { | |
358 | struct sysinfo_1_2_2 *info; | |
359 | int rc; | |
360 | ||
361 | info = (void *) get_zeroed_page(GFP_KERNEL); | |
362 | if (!info) | |
363 | return -ENOMEM; | |
364 | rc = stsi(info, 1, 2, 2); | |
365 | if (rc == -ENOSYS) | |
366 | goto out; | |
367 | rc = 0; | |
368 | *capability = info->capability; | |
369 | out: | |
370 | free_page((unsigned long) info); | |
371 | return rc; | |
372 | } | |
373 | ||
31ee4b2f MS |
374 | /* |
375 | * CPU capability might have changed. Therefore recalculate loops_per_jiffy. | |
376 | */ | |
377 | void s390_adjust_jiffies(void) | |
378 | { | |
379 | struct sysinfo_1_2_2 *info; | |
380 | const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */ | |
381 | FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR); | |
382 | FP_DECL_EX; | |
383 | unsigned int capability; | |
384 | ||
385 | info = (void *) get_zeroed_page(GFP_KERNEL); | |
386 | if (!info) | |
387 | return; | |
388 | ||
389 | if (stsi(info, 1, 2, 2) != -ENOSYS) { | |
390 | /* | |
391 | * Major sigh. The cpu capability encoding is "special". | |
392 | * If the first 9 bits of info->capability are 0 then it | |
393 | * is a 32 bit unsigned integer in the range 0 .. 2^23. | |
394 | * If the first 9 bits are != 0 then it is a 32 bit float. | |
395 | * In addition a lower value indicates a proportionally | |
396 | * higher cpu capacity. Bogomips are the other way round. | |
397 | * To get to a halfway suitable number we divide 1e7 | |
398 | * by the cpu capability number. Yes, that means a floating | |
399 | * point division .. math-emu here we come :-) | |
400 | */ | |
401 | FP_UNPACK_SP(SA, &fmil); | |
402 | if ((info->capability >> 23) == 0) | |
403 | FP_FROM_INT_S(SB, info->capability, 32, int); | |
404 | else | |
405 | FP_UNPACK_SP(SB, &info->capability); | |
406 | FP_DIV_S(SR, SA, SB); | |
407 | FP_TO_INT_S(capability, SR, 32, 0); | |
408 | } else | |
409 | /* | |
410 | * Really old machine without stsi block for basic | |
411 | * cpu information. Report 42.0 bogomips. | |
412 | */ | |
413 | capability = 42; | |
414 | loops_per_jiffy = capability * (500000/HZ); | |
415 | free_page((unsigned long) info); | |
416 | } | |
417 | ||
418 | /* | |
419 | * calibrate the delay loop | |
420 | */ | |
6c81c32f | 421 | void __cpuinit calibrate_delay(void) |
31ee4b2f MS |
422 | { |
423 | s390_adjust_jiffies(); | |
424 | /* Print the good old Bogomips line .. */ | |
425 | printk(KERN_DEBUG "Calibrating delay loop (skipped)... " | |
426 | "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ), | |
427 | (loops_per_jiffy/(5000/HZ)) % 100); | |
428 | } |