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 #include <asm/topology.h>
19
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
25 int topology_max_mnest;
26
27 /*
28 * stsi - store system information
29 *
30 * Returns the current configuration level if function code 0 was specified.
31 * Otherwise returns 0 on success or a negative value on error.
32 */
stsi(void * sysinfo,int fc,int sel1,int sel2)33 int stsi(void *sysinfo, int fc, int sel1, int sel2)
34 {
35 register int r0 asm("0") = (fc << 28) | sel1;
36 register int r1 asm("1") = sel2;
37 int rc = 0;
38
39 asm volatile(
40 " stsi 0(%3)\n"
41 "0: jz 2f\n"
42 "1: lhi %1,%4\n"
43 "2:\n"
44 EX_TABLE(0b, 1b)
45 : "+d" (r0), "+d" (rc)
46 : "d" (r1), "a" (sysinfo), "K" (-EOPNOTSUPP)
47 : "cc", "memory");
48 if (rc)
49 return rc;
50 return fc ? 0 : ((unsigned int) r0) >> 28;
51 }
52 EXPORT_SYMBOL(stsi);
53
stsi_1_1_1(struct seq_file * m,struct sysinfo_1_1_1 * info)54 static void stsi_1_1_1(struct seq_file *m, struct sysinfo_1_1_1 *info)
55 {
56 int i;
57
58 if (stsi(info, 1, 1, 1))
59 return;
60 EBCASC(info->manufacturer, sizeof(info->manufacturer));
61 EBCASC(info->type, sizeof(info->type));
62 EBCASC(info->model, sizeof(info->model));
63 EBCASC(info->sequence, sizeof(info->sequence));
64 EBCASC(info->plant, sizeof(info->plant));
65 EBCASC(info->model_capacity, sizeof(info->model_capacity));
66 EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
67 EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
68 seq_printf(m, "Manufacturer: %-16.16s\n", info->manufacturer);
69 seq_printf(m, "Type: %-4.4s\n", info->type);
70 /*
71 * Sigh: the model field has been renamed with System z9
72 * to model_capacity and a new model field has been added
73 * after the plant field. To avoid confusing older programs
74 * the "Model:" prints "model_capacity model" or just
75 * "model_capacity" if the model string is empty .
76 */
77 seq_printf(m, "Model: %-16.16s", info->model_capacity);
78 if (info->model[0] != '\0')
79 seq_printf(m, " %-16.16s", info->model);
80 seq_putc(m, '\n');
81 seq_printf(m, "Sequence Code: %-16.16s\n", info->sequence);
82 seq_printf(m, "Plant: %-4.4s\n", info->plant);
83 seq_printf(m, "Model Capacity: %-16.16s %08u\n",
84 info->model_capacity, info->model_cap_rating);
85 if (info->model_perm_cap_rating)
86 seq_printf(m, "Model Perm. Capacity: %-16.16s %08u\n",
87 info->model_perm_cap,
88 info->model_perm_cap_rating);
89 if (info->model_temp_cap_rating)
90 seq_printf(m, "Model Temp. Capacity: %-16.16s %08u\n",
91 info->model_temp_cap,
92 info->model_temp_cap_rating);
93 if (info->ncr)
94 seq_printf(m, "Nominal Cap. Rating: %08u\n", info->ncr);
95 if (info->npr)
96 seq_printf(m, "Nominal Perm. Rating: %08u\n", info->npr);
97 if (info->ntr)
98 seq_printf(m, "Nominal Temp. Rating: %08u\n", info->ntr);
99 if (info->cai) {
100 seq_printf(m, "Capacity Adj. Ind.: %d\n", info->cai);
101 seq_printf(m, "Capacity Ch. Reason: %d\n", info->ccr);
102 seq_printf(m, "Capacity Transient: %d\n", info->t);
103 }
104 if (info->p) {
105 for (i = 1; i <= ARRAY_SIZE(info->typepct); i++) {
106 seq_printf(m, "Type %d Percentage: %d\n",
107 i, info->typepct[i - 1]);
108 }
109 }
110 }
111
stsi_15_1_x(struct seq_file * m,struct sysinfo_15_1_x * info)112 static void stsi_15_1_x(struct seq_file *m, struct sysinfo_15_1_x *info)
113 {
114 static int max_mnest;
115 int i, rc;
116
117 seq_putc(m, '\n');
118 if (!MACHINE_HAS_TOPOLOGY)
119 return;
120 if (stsi(info, 15, 1, topology_max_mnest))
121 return;
122 seq_printf(m, "CPU Topology HW: ");
123 for (i = 0; i < TOPOLOGY_NR_MAG; i++)
124 seq_printf(m, " %d", info->mag[i]);
125 seq_putc(m, '\n');
126 #ifdef CONFIG_SCHED_MC
127 store_topology(info);
128 seq_printf(m, "CPU Topology SW: ");
129 for (i = 0; i < TOPOLOGY_NR_MAG; i++)
130 seq_printf(m, " %d", info->mag[i]);
131 seq_putc(m, '\n');
132 #endif
133 }
134
stsi_1_2_2(struct seq_file * m,struct sysinfo_1_2_2 * info)135 static void stsi_1_2_2(struct seq_file *m, struct sysinfo_1_2_2 *info)
136 {
137 struct sysinfo_1_2_2_extension *ext;
138 int i;
139
140 if (stsi(info, 1, 2, 2))
141 return;
142 ext = (struct sysinfo_1_2_2_extension *)
143 ((unsigned long) info + info->acc_offset);
144 seq_printf(m, "CPUs Total: %d\n", info->cpus_total);
145 seq_printf(m, "CPUs Configured: %d\n", info->cpus_configured);
146 seq_printf(m, "CPUs Standby: %d\n", info->cpus_standby);
147 seq_printf(m, "CPUs Reserved: %d\n", info->cpus_reserved);
148 /*
149 * Sigh 2. According to the specification the alternate
150 * capability field is a 32 bit floating point number
151 * if the higher order 8 bits are not zero. Printing
152 * a floating point number in the kernel is a no-no,
153 * always print the number as 32 bit unsigned integer.
154 * The user-space needs to know about the strange
155 * encoding of the alternate cpu capability.
156 */
157 seq_printf(m, "Capability: %u", info->capability);
158 if (info->format == 1)
159 seq_printf(m, " %u", ext->alt_capability);
160 seq_putc(m, '\n');
161 if (info->nominal_cap)
162 seq_printf(m, "Nominal Capability: %d\n", info->nominal_cap);
163 if (info->secondary_cap)
164 seq_printf(m, "Secondary Capability: %d\n", info->secondary_cap);
165 for (i = 2; i <= info->cpus_total; i++) {
166 seq_printf(m, "Adjustment %02d-way: %u",
167 i, info->adjustment[i-2]);
168 if (info->format == 1)
169 seq_printf(m, " %u", ext->alt_adjustment[i-2]);
170 seq_putc(m, '\n');
171 }
172 }
173
stsi_2_2_2(struct seq_file * m,struct sysinfo_2_2_2 * info)174 static void stsi_2_2_2(struct seq_file *m, struct sysinfo_2_2_2 *info)
175 {
176 if (stsi(info, 2, 2, 2))
177 return;
178 EBCASC(info->name, sizeof(info->name));
179 seq_putc(m, '\n');
180 seq_printf(m, "LPAR Number: %d\n", info->lpar_number);
181 seq_printf(m, "LPAR Characteristics: ");
182 if (info->characteristics & LPAR_CHAR_DEDICATED)
183 seq_printf(m, "Dedicated ");
184 if (info->characteristics & LPAR_CHAR_SHARED)
185 seq_printf(m, "Shared ");
186 if (info->characteristics & LPAR_CHAR_LIMITED)
187 seq_printf(m, "Limited ");
188 seq_putc(m, '\n');
189 seq_printf(m, "LPAR Name: %-8.8s\n", info->name);
190 seq_printf(m, "LPAR Adjustment: %d\n", info->caf);
191 seq_printf(m, "LPAR CPUs Total: %d\n", info->cpus_total);
192 seq_printf(m, "LPAR CPUs Configured: %d\n", info->cpus_configured);
193 seq_printf(m, "LPAR CPUs Standby: %d\n", info->cpus_standby);
194 seq_printf(m, "LPAR CPUs Reserved: %d\n", info->cpus_reserved);
195 seq_printf(m, "LPAR CPUs Dedicated: %d\n", info->cpus_dedicated);
196 seq_printf(m, "LPAR CPUs Shared: %d\n", info->cpus_shared);
197 if (info->mt_installed & 0x80) {
198 seq_printf(m, "LPAR CPUs G-MTID: %d\n",
199 info->mt_general & 0x1f);
200 seq_printf(m, "LPAR CPUs S-MTID: %d\n",
201 info->mt_installed & 0x1f);
202 seq_printf(m, "LPAR CPUs PS-MTID: %d\n",
203 info->mt_psmtid & 0x1f);
204 }
205 }
206
print_ext_name(struct seq_file * m,int lvl,struct sysinfo_3_2_2 * info)207 static void print_ext_name(struct seq_file *m, int lvl,
208 struct sysinfo_3_2_2 *info)
209 {
210 if (info->vm[lvl].ext_name_encoding == 0)
211 return;
212 if (info->ext_names[lvl][0] == 0)
213 return;
214 switch (info->vm[lvl].ext_name_encoding) {
215 case 1: /* EBCDIC */
216 EBCASC(info->ext_names[lvl], sizeof(info->ext_names[lvl]));
217 break;
218 case 2: /* UTF-8 */
219 break;
220 default:
221 return;
222 }
223 seq_printf(m, "VM%02d Extended Name: %-.256s\n", lvl,
224 info->ext_names[lvl]);
225 }
226
print_uuid(struct seq_file * m,int i,struct sysinfo_3_2_2 * info)227 static void print_uuid(struct seq_file *m, int i, struct sysinfo_3_2_2 *info)
228 {
229 if (!memcmp(&info->vm[i].uuid, &NULL_UUID_BE, sizeof(uuid_be)))
230 return;
231 seq_printf(m, "VM%02d UUID: %pUb\n", i, &info->vm[i].uuid);
232 }
233
stsi_3_2_2(struct seq_file * m,struct sysinfo_3_2_2 * info)234 static void stsi_3_2_2(struct seq_file *m, struct sysinfo_3_2_2 *info)
235 {
236 int i;
237
238 if (stsi(info, 3, 2, 2))
239 return;
240 for (i = 0; i < info->count; i++) {
241 EBCASC(info->vm[i].name, sizeof(info->vm[i].name));
242 EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi));
243 seq_putc(m, '\n');
244 seq_printf(m, "VM%02d Name: %-8.8s\n", i, info->vm[i].name);
245 seq_printf(m, "VM%02d Control Program: %-16.16s\n", i, info->vm[i].cpi);
246 seq_printf(m, "VM%02d Adjustment: %d\n", i, info->vm[i].caf);
247 seq_printf(m, "VM%02d CPUs Total: %d\n", i, info->vm[i].cpus_total);
248 seq_printf(m, "VM%02d CPUs Configured: %d\n", i, info->vm[i].cpus_configured);
249 seq_printf(m, "VM%02d CPUs Standby: %d\n", i, info->vm[i].cpus_standby);
250 seq_printf(m, "VM%02d CPUs Reserved: %d\n", i, info->vm[i].cpus_reserved);
251 print_ext_name(m, i, info);
252 print_uuid(m, i, info);
253 }
254 }
255
sysinfo_show(struct seq_file * m,void * v)256 static int sysinfo_show(struct seq_file *m, void *v)
257 {
258 void *info = (void *)get_zeroed_page(GFP_KERNEL);
259 int level;
260
261 if (!info)
262 return 0;
263 level = stsi(NULL, 0, 0, 0);
264 if (level >= 1)
265 stsi_1_1_1(m, info);
266 if (level >= 1)
267 stsi_15_1_x(m, info);
268 if (level >= 1)
269 stsi_1_2_2(m, info);
270 if (level >= 2)
271 stsi_2_2_2(m, info);
272 if (level >= 3)
273 stsi_3_2_2(m, info);
274 free_page((unsigned long)info);
275 return 0;
276 }
277
sysinfo_open(struct inode * inode,struct file * file)278 static int sysinfo_open(struct inode *inode, struct file *file)
279 {
280 return single_open(file, sysinfo_show, NULL);
281 }
282
283 static const struct file_operations sysinfo_fops = {
284 .open = sysinfo_open,
285 .read = seq_read,
286 .llseek = seq_lseek,
287 .release = single_release,
288 };
289
sysinfo_create_proc(void)290 static int __init sysinfo_create_proc(void)
291 {
292 proc_create("sysinfo", 0444, NULL, &sysinfo_fops);
293 return 0;
294 }
295 device_initcall(sysinfo_create_proc);
296
297 /*
298 * Service levels interface.
299 */
300
301 static DECLARE_RWSEM(service_level_sem);
302 static LIST_HEAD(service_level_list);
303
register_service_level(struct service_level * slr)304 int register_service_level(struct service_level *slr)
305 {
306 struct service_level *ptr;
307
308 down_write(&service_level_sem);
309 list_for_each_entry(ptr, &service_level_list, list)
310 if (ptr == slr) {
311 up_write(&service_level_sem);
312 return -EEXIST;
313 }
314 list_add_tail(&slr->list, &service_level_list);
315 up_write(&service_level_sem);
316 return 0;
317 }
318 EXPORT_SYMBOL(register_service_level);
319
unregister_service_level(struct service_level * slr)320 int unregister_service_level(struct service_level *slr)
321 {
322 struct service_level *ptr, *next;
323 int rc = -ENOENT;
324
325 down_write(&service_level_sem);
326 list_for_each_entry_safe(ptr, next, &service_level_list, list) {
327 if (ptr != slr)
328 continue;
329 list_del(&ptr->list);
330 rc = 0;
331 break;
332 }
333 up_write(&service_level_sem);
334 return rc;
335 }
336 EXPORT_SYMBOL(unregister_service_level);
337
service_level_start(struct seq_file * m,loff_t * pos)338 static void *service_level_start(struct seq_file *m, loff_t *pos)
339 {
340 down_read(&service_level_sem);
341 return seq_list_start(&service_level_list, *pos);
342 }
343
service_level_next(struct seq_file * m,void * p,loff_t * pos)344 static void *service_level_next(struct seq_file *m, void *p, loff_t *pos)
345 {
346 return seq_list_next(p, &service_level_list, pos);
347 }
348
service_level_stop(struct seq_file * m,void * p)349 static void service_level_stop(struct seq_file *m, void *p)
350 {
351 up_read(&service_level_sem);
352 }
353
service_level_show(struct seq_file * m,void * p)354 static int service_level_show(struct seq_file *m, void *p)
355 {
356 struct service_level *slr;
357
358 slr = list_entry(p, struct service_level, list);
359 slr->seq_print(m, slr);
360 return 0;
361 }
362
363 static const struct seq_operations service_level_seq_ops = {
364 .start = service_level_start,
365 .next = service_level_next,
366 .stop = service_level_stop,
367 .show = service_level_show
368 };
369
service_level_open(struct inode * inode,struct file * file)370 static int service_level_open(struct inode *inode, struct file *file)
371 {
372 return seq_open(file, &service_level_seq_ops);
373 }
374
375 static const struct file_operations service_level_ops = {
376 .open = service_level_open,
377 .read = seq_read,
378 .llseek = seq_lseek,
379 .release = seq_release
380 };
381
service_level_vm_print(struct seq_file * m,struct service_level * slr)382 static void service_level_vm_print(struct seq_file *m,
383 struct service_level *slr)
384 {
385 char *query_buffer, *str;
386
387 query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA);
388 if (!query_buffer)
389 return;
390 cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL);
391 str = strchr(query_buffer, '\n');
392 if (str)
393 *str = 0;
394 seq_printf(m, "VM: %s\n", query_buffer);
395 kfree(query_buffer);
396 }
397
398 static struct service_level service_level_vm = {
399 .seq_print = service_level_vm_print
400 };
401
create_proc_service_level(void)402 static __init int create_proc_service_level(void)
403 {
404 proc_create("service_levels", 0, NULL, &service_level_ops);
405 if (MACHINE_IS_VM)
406 register_service_level(&service_level_vm);
407 return 0;
408 }
409 subsys_initcall(create_proc_service_level);
410
411 /*
412 * CPU capability might have changed. Therefore recalculate loops_per_jiffy.
413 */
s390_adjust_jiffies(void)414 void s390_adjust_jiffies(void)
415 {
416 struct sysinfo_1_2_2 *info;
417 const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */
418 FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
419 FP_DECL_EX;
420 unsigned int capability;
421
422 info = (void *) get_zeroed_page(GFP_KERNEL);
423 if (!info)
424 return;
425
426 if (stsi(info, 1, 2, 2) == 0) {
427 /*
428 * Major sigh. The cpu capability encoding is "special".
429 * If the first 9 bits of info->capability are 0 then it
430 * is a 32 bit unsigned integer in the range 0 .. 2^23.
431 * If the first 9 bits are != 0 then it is a 32 bit float.
432 * In addition a lower value indicates a proportionally
433 * higher cpu capacity. Bogomips are the other way round.
434 * To get to a halfway suitable number we divide 1e7
435 * by the cpu capability number. Yes, that means a floating
436 * point division .. math-emu here we come :-)
437 */
438 FP_UNPACK_SP(SA, &fmil);
439 if ((info->capability >> 23) == 0)
440 FP_FROM_INT_S(SB, (long) info->capability, 64, long);
441 else
442 FP_UNPACK_SP(SB, &info->capability);
443 FP_DIV_S(SR, SA, SB);
444 FP_TO_INT_S(capability, SR, 32, 0);
445 } else
446 /*
447 * Really old machine without stsi block for basic
448 * cpu information. Report 42.0 bogomips.
449 */
450 capability = 42;
451 loops_per_jiffy = capability * (500000/HZ);
452 free_page((unsigned long) info);
453 }
454
455 /*
456 * calibrate the delay loop
457 */
calibrate_delay(void)458 void calibrate_delay(void)
459 {
460 s390_adjust_jiffies();
461 /* Print the good old Bogomips line .. */
462 printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
463 "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
464 (loops_per_jiffy/(5000/HZ)) % 100);
465 }
466