2 * Copyright IBM Corp. 2001, 2009
3 * Author(s): Ulrich Weigand <Ulrich.Weigand@de.ibm.com>,
4 * Martin Schwidefsky <schwidefsky@de.ibm.com>,
7 #include <linux/kernel.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>
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>
25 static inline int stsi_0(void)
27 int rc = stsi(NULL, 0, 0, 0);
28 return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28);
31 static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len)
33 if (stsi(info, 1, 1, 1) == -ENOSYS)
36 EBCASC(info->manufacturer, sizeof(info->manufacturer));
37 EBCASC(info->type, sizeof(info->type));
38 EBCASC(info->model, sizeof(info->model));
39 EBCASC(info->sequence, sizeof(info->sequence));
40 EBCASC(info->plant, sizeof(info->plant));
41 EBCASC(info->model_capacity, sizeof(info->model_capacity));
42 EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
43 EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
44 len += sprintf(page + len, "Manufacturer: %-16.16s\n",
46 len += sprintf(page + len, "Type: %-4.4s\n",
48 if (info->model[0] != '\0')
50 * Sigh: the model field has been renamed with System z9
51 * to model_capacity and a new model field has been added
52 * after the plant field. To avoid confusing older programs
53 * the "Model:" prints "model_capacity model" or just
54 * "model_capacity" if the model string is empty .
56 len += sprintf(page + len,
57 "Model: %-16.16s %-16.16s\n",
58 info->model_capacity, info->model);
60 len += sprintf(page + len, "Model: %-16.16s\n",
61 info->model_capacity);
62 len += sprintf(page + len, "Sequence Code: %-16.16s\n",
64 len += sprintf(page + len, "Plant: %-4.4s\n",
66 len += sprintf(page + len, "Model Capacity: %-16.16s %08u\n",
67 info->model_capacity, *(u32 *) info->model_cap_rating);
68 if (info->model_perm_cap[0] != '\0')
69 len += sprintf(page + len,
70 "Model Perm. Capacity: %-16.16s %08u\n",
72 *(u32 *) info->model_perm_cap_rating);
73 if (info->model_temp_cap[0] != '\0')
74 len += sprintf(page + len,
75 "Model Temp. Capacity: %-16.16s %08u\n",
77 *(u32 *) info->model_temp_cap_rating);
79 len += sprintf(page + len,
80 "Capacity Adj. Ind.: %d\n",
82 len += sprintf(page + len, "Capacity Ch. Reason: %d\n",
88 static int stsi_15_1_x(struct sysinfo_15_1_x *info, char *page, int len)
93 len += sprintf(page + len, "\n");
94 if (!MACHINE_HAS_TOPOLOGY)
97 stsi(info, 15, 1, max_mnest);
99 for (max_mnest = 6; max_mnest > 1; max_mnest--) {
100 rc = stsi(info, 15, 1, max_mnest);
105 len += sprintf(page + len, "CPU Topology HW: ");
106 for (i = 0; i < TOPOLOGY_NR_MAG; i++)
107 len += sprintf(page + len, " %d", info->mag[i]);
108 len += sprintf(page + len, "\n");
109 store_topology(info);
110 len += sprintf(page + len, "CPU Topology SW: ");
111 for (i = 0; i < TOPOLOGY_NR_MAG; i++)
112 len += sprintf(page + len, " %d", info->mag[i]);
113 len += sprintf(page + len, "\n");
117 static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len)
119 struct sysinfo_1_2_2_extension *ext;
122 if (stsi(info, 1, 2, 2) == -ENOSYS)
124 ext = (struct sysinfo_1_2_2_extension *)
125 ((unsigned long) info + info->acc_offset);
127 len += sprintf(page + len, "CPUs Total: %d\n",
129 len += sprintf(page + len, "CPUs Configured: %d\n",
130 info->cpus_configured);
131 len += sprintf(page + len, "CPUs Standby: %d\n",
133 len += sprintf(page + len, "CPUs Reserved: %d\n",
134 info->cpus_reserved);
136 if (info->format == 1) {
138 * Sigh 2. According to the specification the alternate
139 * capability field is a 32 bit floating point number
140 * if the higher order 8 bits are not zero. Printing
141 * a floating point number in the kernel is a no-no,
142 * always print the number as 32 bit unsigned integer.
143 * The user-space needs to know about the strange
144 * encoding of the alternate cpu capability.
146 len += sprintf(page + len, "Capability: %u %u\n",
147 info->capability, ext->alt_capability);
148 for (i = 2; i <= info->cpus_total; i++)
149 len += sprintf(page + len,
150 "Adjustment %02d-way: %u %u\n",
151 i, info->adjustment[i-2],
152 ext->alt_adjustment[i-2]);
155 len += sprintf(page + len, "Capability: %u\n",
157 for (i = 2; i <= info->cpus_total; i++)
158 len += sprintf(page + len,
159 "Adjustment %02d-way: %u\n",
160 i, info->adjustment[i-2]);
163 if (info->secondary_capability != 0)
164 len += sprintf(page + len, "Secondary Capability: %d\n",
165 info->secondary_capability);
169 static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len)
171 if (stsi(info, 2, 2, 2) == -ENOSYS)
174 EBCASC(info->name, sizeof(info->name));
176 len += sprintf(page + len, "\n");
177 len += sprintf(page + len, "LPAR Number: %d\n",
180 len += sprintf(page + len, "LPAR Characteristics: ");
181 if (info->characteristics & LPAR_CHAR_DEDICATED)
182 len += sprintf(page + len, "Dedicated ");
183 if (info->characteristics & LPAR_CHAR_SHARED)
184 len += sprintf(page + len, "Shared ");
185 if (info->characteristics & LPAR_CHAR_LIMITED)
186 len += sprintf(page + len, "Limited ");
187 len += sprintf(page + len, "\n");
189 len += sprintf(page + len, "LPAR Name: %-8.8s\n",
192 len += sprintf(page + len, "LPAR Adjustment: %d\n",
195 len += sprintf(page + len, "LPAR CPUs Total: %d\n",
197 len += sprintf(page + len, "LPAR CPUs Configured: %d\n",
198 info->cpus_configured);
199 len += sprintf(page + len, "LPAR CPUs Standby: %d\n",
201 len += sprintf(page + len, "LPAR CPUs Reserved: %d\n",
202 info->cpus_reserved);
203 len += sprintf(page + len, "LPAR CPUs Dedicated: %d\n",
204 info->cpus_dedicated);
205 len += sprintf(page + len, "LPAR CPUs Shared: %d\n",
210 static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len)
214 if (stsi(info, 3, 2, 2) == -ENOSYS)
216 for (i = 0; i < info->count; i++) {
217 EBCASC(info->vm[i].name, sizeof(info->vm[i].name));
218 EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi));
219 len += sprintf(page + len, "\n");
220 len += sprintf(page + len, "VM%02d Name: %-8.8s\n",
221 i, info->vm[i].name);
222 len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n",
225 len += sprintf(page + len, "VM%02d Adjustment: %d\n",
228 len += sprintf(page + len, "VM%02d CPUs Total: %d\n",
229 i, info->vm[i].cpus_total);
230 len += sprintf(page + len, "VM%02d CPUs Configured: %d\n",
231 i, info->vm[i].cpus_configured);
232 len += sprintf(page + len, "VM%02d CPUs Standby: %d\n",
233 i, info->vm[i].cpus_standby);
234 len += sprintf(page + len, "VM%02d CPUs Reserved: %d\n",
235 i, info->vm[i].cpus_reserved);
240 static int proc_read_sysinfo(char *page, char **start,
241 off_t off, int count,
242 int *eof, void *data)
244 unsigned long info = get_zeroed_page(GFP_KERNEL);
253 len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len);
256 len = stsi_15_1_x((struct sysinfo_15_1_x *) info, page, len);
259 len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len);
262 len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len);
265 len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len);
271 static __init int create_proc_sysinfo(void)
273 create_proc_read_entry("sysinfo", 0444, NULL,
274 proc_read_sysinfo, NULL);
277 device_initcall(create_proc_sysinfo);
280 * Service levels interface.
283 static DECLARE_RWSEM(service_level_sem);
284 static LIST_HEAD(service_level_list);
286 int register_service_level(struct service_level *slr)
288 struct service_level *ptr;
290 down_write(&service_level_sem);
291 list_for_each_entry(ptr, &service_level_list, list)
293 up_write(&service_level_sem);
296 list_add_tail(&slr->list, &service_level_list);
297 up_write(&service_level_sem);
300 EXPORT_SYMBOL(register_service_level);
302 int unregister_service_level(struct service_level *slr)
304 struct service_level *ptr, *next;
307 down_write(&service_level_sem);
308 list_for_each_entry_safe(ptr, next, &service_level_list, list) {
311 list_del(&ptr->list);
315 up_write(&service_level_sem);
318 EXPORT_SYMBOL(unregister_service_level);
320 static void *service_level_start(struct seq_file *m, loff_t *pos)
322 down_read(&service_level_sem);
323 return seq_list_start(&service_level_list, *pos);
326 static void *service_level_next(struct seq_file *m, void *p, loff_t *pos)
328 return seq_list_next(p, &service_level_list, pos);
331 static void service_level_stop(struct seq_file *m, void *p)
333 up_read(&service_level_sem);
336 static int service_level_show(struct seq_file *m, void *p)
338 struct service_level *slr;
340 slr = list_entry(p, struct service_level, list);
341 slr->seq_print(m, slr);
345 static const struct seq_operations service_level_seq_ops = {
346 .start = service_level_start,
347 .next = service_level_next,
348 .stop = service_level_stop,
349 .show = service_level_show
352 static int service_level_open(struct inode *inode, struct file *file)
354 return seq_open(file, &service_level_seq_ops);
357 static const struct file_operations service_level_ops = {
358 .open = service_level_open,
361 .release = seq_release
364 static void service_level_vm_print(struct seq_file *m,
365 struct service_level *slr)
367 char *query_buffer, *str;
369 query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA);
372 cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL);
373 str = strchr(query_buffer, '\n');
376 seq_printf(m, "VM: %s\n", query_buffer);
380 static struct service_level service_level_vm = {
381 .seq_print = service_level_vm_print
384 static __init int create_proc_service_level(void)
386 proc_create("service_levels", 0, NULL, &service_level_ops);
388 register_service_level(&service_level_vm);
391 subsys_initcall(create_proc_service_level);
394 * Bogomips calculation based on cpu capability.
396 int get_cpu_capability(unsigned int *capability)
398 struct sysinfo_1_2_2 *info;
401 info = (void *) get_zeroed_page(GFP_KERNEL);
404 rc = stsi(info, 1, 2, 2);
408 *capability = info->capability;
410 free_page((unsigned long) info);
415 * CPU capability might have changed. Therefore recalculate loops_per_jiffy.
417 void s390_adjust_jiffies(void)
419 struct sysinfo_1_2_2 *info;
420 const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */
421 FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
423 unsigned int capability;
425 info = (void *) get_zeroed_page(GFP_KERNEL);
429 if (stsi(info, 1, 2, 2) != -ENOSYS) {
431 * Major sigh. The cpu capability encoding is "special".
432 * If the first 9 bits of info->capability are 0 then it
433 * is a 32 bit unsigned integer in the range 0 .. 2^23.
434 * If the first 9 bits are != 0 then it is a 32 bit float.
435 * In addition a lower value indicates a proportionally
436 * higher cpu capacity. Bogomips are the other way round.
437 * To get to a halfway suitable number we divide 1e7
438 * by the cpu capability number. Yes, that means a floating
439 * point division .. math-emu here we come :-)
441 FP_UNPACK_SP(SA, &fmil);
442 if ((info->capability >> 23) == 0)
443 FP_FROM_INT_S(SB, info->capability, 32, int);
445 FP_UNPACK_SP(SB, &info->capability);
446 FP_DIV_S(SR, SA, SB);
447 FP_TO_INT_S(capability, SR, 32, 0);
450 * Really old machine without stsi block for basic
451 * cpu information. Report 42.0 bogomips.
454 loops_per_jiffy = capability * (500000/HZ);
455 free_page((unsigned long) info);
459 * calibrate the delay loop
461 void __cpuinit calibrate_delay(void)
463 s390_adjust_jiffies();
464 /* Print the good old Bogomips line .. */
465 printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
466 "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
467 (loops_per_jiffy/(5000/HZ)) % 100);