?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Full support for Ginger Console
[linux-ginger.git] / arch / s390 / kernel / sysinfo.c
blobb5e75e1061c82d35b40b63594f1889ce07d0453b
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 <asm/ebcdic.h>
15 #include <asm/sysinfo.h>
16 #include <asm/cpcmd.h>
17
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
23 static inline int stsi_0(void)
24 {
25 int rc = stsi(NULL, 0, 0, 0);
26 return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28);
27 }
28
29 static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len)
30 {
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));
40 EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
41 EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
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);
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);
76 return len;
77 }
78
79 static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len)
80 {
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.
106 * The user-space needs to know about the strange
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);
129 return len;
130 }
131
132 static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len)
133 {
134 if (stsi(info, 2, 2, 2) == -ENOSYS)
135 return len;
136
137 EBCASC(info->name, sizeof(info->name));
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;
171 }
172
173 static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len)
174 {
175 int i;
176
177 if (stsi(info, 3, 2, 2) == -ENOSYS)
178 return len;
179 for (i = 0; i < info->count; i++) {
180 EBCASC(info->vm[i].name, sizeof(info->vm[i].name));
181 EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi));
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);
199 }
200 return len;
201 }
202
203 static int proc_read_sysinfo(char *page, char **start,
204 off_t off, int count,
205 int *eof, void *data)
206 {
207 unsigned long info = get_zeroed_page(GFP_KERNEL);
208 int level, len;
209
210 if (!info)
211 return 0;
212
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);
217
218 if (level >= 1)
219 len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len);
220
221 if (level >= 2)
222 len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len);
223
224 if (level >= 3)
225 len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len);
226
227 free_page(info);
228 return len;
229 }
230
231 static __init int create_proc_sysinfo(void)
232 {
233 create_proc_read_entry("sysinfo", 0444, NULL,
234 proc_read_sysinfo, NULL);
235 return 0;
236 }
237 device_initcall(create_proc_sysinfo);
238
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 }
351 subsys_initcall(create_proc_service_level);
352
353 /*
354 * Bogomips calculation based on cpu capability.
355 */
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
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 */
421 void __cpuinit calibrate_delay(void)
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 }
Linux for Ginger Game Console