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Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs
[linux/fpc-iii.git] / arch / s390 / kernel / sysinfo.c
bloba0ffc7717ed62994609a66b22202982b1c867dba
1 /*
2 * Copyright IBM Corp. 2001, 2009
3 * Author(s): Ulrich Weigand <Ulrich.Weigand@de.ibm.com>,
4 * Martin Schwidefsky <schwidefsky@de.ibm.com>,
5 */
6
7 #include <linux/kernel.h>
8 #include <linux/mm.h>
9 #include <linux/proc_fs.h>
10 #include <linux/seq_file.h>
11 #include <linux/init.h>
12 #include <linux/delay.h>
13 #include <linux/module.h>
14 #include <linux/slab.h>
15 #include <asm/ebcdic.h>
16 #include <asm/sysinfo.h>
17 #include <asm/cpcmd.h>
18
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
24 static inline int stsi_0(void)
25 {
26 int rc = stsi(NULL, 0, 0, 0);
27 return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28);
28 }
29
30 static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len)
31 {
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));
41 EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
42 EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
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);
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);
77 return len;
78 }
79
80 static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len)
81 {
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.
107 * The user-space needs to know about the strange
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);
130 return len;
131 }
132
133 static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len)
134 {
135 if (stsi(info, 2, 2, 2) == -ENOSYS)
136 return len;
137
138 EBCASC(info->name, sizeof(info->name));
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;
172 }
173
174 static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len)
175 {
176 int i;
177
178 if (stsi(info, 3, 2, 2) == -ENOSYS)
179 return len;
180 for (i = 0; i < info->count; i++) {
181 EBCASC(info->vm[i].name, sizeof(info->vm[i].name));
182 EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi));
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);
200 }
201 return len;
202 }
203
204 static int proc_read_sysinfo(char *page, char **start,
205 off_t off, int count,
206 int *eof, void *data)
207 {
208 unsigned long info = get_zeroed_page(GFP_KERNEL);
209 int level, len;
210
211 if (!info)
212 return 0;
213
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);
218
219 if (level >= 1)
220 len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len);
221
222 if (level >= 2)
223 len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len);
224
225 if (level >= 3)
226 len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len);
227
228 free_page(info);
229 return len;
230 }
231
232 static __init int create_proc_sysinfo(void)
233 {
234 create_proc_read_entry("sysinfo", 0444, NULL,
235 proc_read_sysinfo, NULL);
236 return 0;
237 }
238 device_initcall(create_proc_sysinfo);
239
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 }
352 subsys_initcall(create_proc_service_level);
353
354 /*
355 * Bogomips calculation based on cpu capability.
356 */
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
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 */
422 void __cpuinit calibrate_delay(void)
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 }
Linux with added FPC-III support