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> |
5a0e3ad6 | 14 | #include <linux/slab.h> |
1da177e4 | 15 | #include <asm/ebcdic.h> |
aa24f7f0 | 16 | #include <asm/sysinfo.h> |
6bcac508 | 17 | #include <asm/cpcmd.h> |
96f4a70d | 18 | #include <asm/topology.h> |
1da177e4 | 19 | |
31ee4b2f MS |
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 | ||
0fee644a | 25 | static inline int stsi_0(void) |
1da177e4 | 26 | { |
94f5b09d | 27 | int rc = stsi(NULL, 0, 0, 0); |
0facaa17 | 28 | |
0fee644a | 29 | return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28); |
1da177e4 LT |
30 | } |
31 | ||
0facaa17 | 32 | static void stsi_1_1_1(struct seq_file *m, struct sysinfo_1_1_1 *info) |
1da177e4 | 33 | { |
0fee644a | 34 | if (stsi(info, 1, 1, 1) == -ENOSYS) |
0facaa17 | 35 | return; |
0fee644a MS |
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)); | |
cbce70e6 MS |
42 | EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap)); |
43 | EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap)); | |
0facaa17 HC |
44 | seq_printf(m, "Manufacturer: %-16.16s\n", info->manufacturer); |
45 | seq_printf(m, "Type: %-4.4s\n", info->type); | |
46 | /* | |
47 | * Sigh: the model field has been renamed with System z9 | |
48 | * to model_capacity and a new model field has been added | |
49 | * after the plant field. To avoid confusing older programs | |
50 | * the "Model:" prints "model_capacity model" or just | |
51 | * "model_capacity" if the model string is empty . | |
52 | */ | |
53 | seq_printf(m, "Model: %-16.16s", info->model_capacity); | |
0fee644a | 54 | if (info->model[0] != '\0') |
0facaa17 HC |
55 | seq_printf(m, " %-16.16s", info->model); |
56 | seq_putc(m, '\n'); | |
57 | seq_printf(m, "Sequence Code: %-16.16s\n", info->sequence); | |
58 | seq_printf(m, "Plant: %-4.4s\n", info->plant); | |
59 | seq_printf(m, "Model Capacity: %-16.16s %08u\n", | |
60 | info->model_capacity, *(u32 *) info->model_cap_rating); | |
cbce70e6 | 61 | if (info->model_perm_cap[0] != '\0') |
0facaa17 HC |
62 | seq_printf(m, "Model Perm. Capacity: %-16.16s %08u\n", |
63 | info->model_perm_cap, | |
64 | *(u32 *) info->model_perm_cap_rating); | |
cbce70e6 | 65 | if (info->model_temp_cap[0] != '\0') |
0facaa17 HC |
66 | seq_printf(m, "Model Temp. Capacity: %-16.16s %08u\n", |
67 | info->model_temp_cap, | |
68 | *(u32 *) info->model_temp_cap_rating); | |
7aca2eda | 69 | if (info->cai) { |
0facaa17 HC |
70 | seq_printf(m, "Capacity Adj. Ind.: %d\n", info->cai); |
71 | seq_printf(m, "Capacity Ch. Reason: %d\n", info->ccr); | |
7aca2eda | 72 | } |
1da177e4 LT |
73 | } |
74 | ||
0facaa17 | 75 | static void stsi_15_1_x(struct seq_file *m, struct sysinfo_15_1_x *info) |
96f4a70d HC |
76 | { |
77 | static int max_mnest; | |
78 | int i, rc; | |
79 | ||
0facaa17 | 80 | seq_putc(m, '\n'); |
96f4a70d | 81 | if (!MACHINE_HAS_TOPOLOGY) |
0facaa17 | 82 | return; |
96f4a70d HC |
83 | if (max_mnest) { |
84 | stsi(info, 15, 1, max_mnest); | |
85 | } else { | |
86 | for (max_mnest = 6; max_mnest > 1; max_mnest--) { | |
87 | rc = stsi(info, 15, 1, max_mnest); | |
88 | if (rc != -ENOSYS) | |
89 | break; | |
90 | } | |
91 | } | |
0facaa17 | 92 | seq_printf(m, "CPU Topology HW: "); |
96f4a70d | 93 | for (i = 0; i < TOPOLOGY_NR_MAG; i++) |
0facaa17 HC |
94 | seq_printf(m, " %d", info->mag[i]); |
95 | seq_putc(m, '\n'); | |
8d11e021 | 96 | #ifdef CONFIG_SCHED_MC |
96f4a70d | 97 | store_topology(info); |
0facaa17 | 98 | seq_printf(m, "CPU Topology SW: "); |
96f4a70d | 99 | for (i = 0; i < TOPOLOGY_NR_MAG; i++) |
0facaa17 HC |
100 | seq_printf(m, " %d", info->mag[i]); |
101 | seq_putc(m, '\n'); | |
8d11e021 | 102 | #endif |
96f4a70d HC |
103 | } |
104 | ||
0facaa17 | 105 | static void stsi_1_2_2(struct seq_file *m, struct sysinfo_1_2_2 *info) |
1da177e4 | 106 | { |
0fee644a MS |
107 | struct sysinfo_1_2_2_extension *ext; |
108 | int i; | |
109 | ||
110 | if (stsi(info, 1, 2, 2) == -ENOSYS) | |
0facaa17 | 111 | return; |
0fee644a MS |
112 | ext = (struct sysinfo_1_2_2_extension *) |
113 | ((unsigned long) info + info->acc_offset); | |
0facaa17 HC |
114 | seq_printf(m, "CPUs Total: %d\n", info->cpus_total); |
115 | seq_printf(m, "CPUs Configured: %d\n", info->cpus_configured); | |
116 | seq_printf(m, "CPUs Standby: %d\n", info->cpus_standby); | |
117 | seq_printf(m, "CPUs Reserved: %d\n", info->cpus_reserved); | |
118 | /* | |
119 | * Sigh 2. According to the specification the alternate | |
120 | * capability field is a 32 bit floating point number | |
121 | * if the higher order 8 bits are not zero. Printing | |
122 | * a floating point number in the kernel is a no-no, | |
123 | * always print the number as 32 bit unsigned integer. | |
124 | * The user-space needs to know about the strange | |
125 | * encoding of the alternate cpu capability. | |
126 | */ | |
127 | seq_printf(m, "Capability: %u", info->capability); | |
128 | if (info->format == 1) | |
129 | seq_printf(m, " %u", ext->alt_capability); | |
130 | seq_putc(m, '\n'); | |
131 | for (i = 2; i <= info->cpus_total; i++) { | |
132 | seq_printf(m, "Adjustment %02d-way: %u", | |
133 | i, info->adjustment[i-2]); | |
134 | if (info->format == 1) | |
135 | seq_printf(m, " %u", ext->alt_adjustment[i-2]); | |
136 | seq_putc(m, '\n'); | |
0fee644a | 137 | } |
0facaa17 HC |
138 | if (info->secondary_capability) |
139 | seq_printf(m, "Secondary Capability: %d\n", | |
140 | info->secondary_capability); | |
1da177e4 LT |
141 | } |
142 | ||
0facaa17 | 143 | static void stsi_2_2_2(struct seq_file *m, struct sysinfo_2_2_2 *info) |
1da177e4 | 144 | { |
0fee644a | 145 | if (stsi(info, 2, 2, 2) == -ENOSYS) |
0facaa17 | 146 | return; |
94f5b09d | 147 | EBCASC(info->name, sizeof(info->name)); |
0facaa17 HC |
148 | seq_putc(m, '\n'); |
149 | seq_printf(m, "LPAR Number: %d\n", info->lpar_number); | |
150 | seq_printf(m, "LPAR Characteristics: "); | |
0fee644a | 151 | if (info->characteristics & LPAR_CHAR_DEDICATED) |
0facaa17 | 152 | seq_printf(m, "Dedicated "); |
0fee644a | 153 | if (info->characteristics & LPAR_CHAR_SHARED) |
0facaa17 | 154 | seq_printf(m, "Shared "); |
0fee644a | 155 | if (info->characteristics & LPAR_CHAR_LIMITED) |
0facaa17 HC |
156 | seq_printf(m, "Limited "); |
157 | seq_putc(m, '\n'); | |
158 | seq_printf(m, "LPAR Name: %-8.8s\n", info->name); | |
159 | seq_printf(m, "LPAR Adjustment: %d\n", info->caf); | |
160 | seq_printf(m, "LPAR CPUs Total: %d\n", info->cpus_total); | |
161 | seq_printf(m, "LPAR CPUs Configured: %d\n", info->cpus_configured); | |
162 | seq_printf(m, "LPAR CPUs Standby: %d\n", info->cpus_standby); | |
163 | seq_printf(m, "LPAR CPUs Reserved: %d\n", info->cpus_reserved); | |
164 | seq_printf(m, "LPAR CPUs Dedicated: %d\n", info->cpus_dedicated); | |
165 | seq_printf(m, "LPAR CPUs Shared: %d\n", info->cpus_shared); | |
1da177e4 LT |
166 | } |
167 | ||
0facaa17 | 168 | static void stsi_3_2_2(struct seq_file *m, struct sysinfo_3_2_2 *info) |
1da177e4 | 169 | { |
0fee644a MS |
170 | int i; |
171 | ||
172 | if (stsi(info, 3, 2, 2) == -ENOSYS) | |
0facaa17 | 173 | return; |
0fee644a | 174 | for (i = 0; i < info->count; i++) { |
94f5b09d HC |
175 | EBCASC(info->vm[i].name, sizeof(info->vm[i].name)); |
176 | EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi)); | |
0facaa17 HC |
177 | seq_putc(m, '\n'); |
178 | seq_printf(m, "VM%02d Name: %-8.8s\n", i, info->vm[i].name); | |
179 | seq_printf(m, "VM%02d Control Program: %-16.16s\n", i, info->vm[i].cpi); | |
180 | seq_printf(m, "VM%02d Adjustment: %d\n", i, info->vm[i].caf); | |
181 | seq_printf(m, "VM%02d CPUs Total: %d\n", i, info->vm[i].cpus_total); | |
182 | seq_printf(m, "VM%02d CPUs Configured: %d\n", i, info->vm[i].cpus_configured); | |
183 | seq_printf(m, "VM%02d CPUs Standby: %d\n", i, info->vm[i].cpus_standby); | |
184 | seq_printf(m, "VM%02d CPUs Reserved: %d\n", i, info->vm[i].cpus_reserved); | |
1da177e4 | 185 | } |
1da177e4 LT |
186 | } |
187 | ||
0facaa17 | 188 | static int sysinfo_show(struct seq_file *m, void *v) |
1da177e4 | 189 | { |
0facaa17 HC |
190 | void *info = (void *)get_zeroed_page(GFP_KERNEL); |
191 | int level; | |
94f5b09d | 192 | |
1da177e4 LT |
193 | if (!info) |
194 | return 0; | |
0fee644a MS |
195 | level = stsi_0(); |
196 | if (level >= 1) | |
0facaa17 | 197 | stsi_1_1_1(m, info); |
0fee644a | 198 | if (level >= 1) |
0facaa17 | 199 | stsi_15_1_x(m, info); |
96f4a70d | 200 | if (level >= 1) |
0facaa17 | 201 | stsi_1_2_2(m, info); |
0fee644a | 202 | if (level >= 2) |
0facaa17 | 203 | stsi_2_2_2(m, info); |
0fee644a | 204 | if (level >= 3) |
0facaa17 HC |
205 | stsi_3_2_2(m, info); |
206 | free_page((unsigned long)info); | |
207 | return 0; | |
208 | } | |
1da177e4 | 209 | |
0facaa17 HC |
210 | static int sysinfo_open(struct inode *inode, struct file *file) |
211 | { | |
212 | return single_open(file, sysinfo_show, NULL); | |
1da177e4 LT |
213 | } |
214 | ||
0facaa17 HC |
215 | static const struct file_operations sysinfo_fops = { |
216 | .open = sysinfo_open, | |
217 | .read = seq_read, | |
218 | .llseek = seq_lseek, | |
219 | .release = single_release, | |
220 | }; | |
221 | ||
222 | static int __init sysinfo_create_proc(void) | |
1da177e4 | 223 | { |
0facaa17 | 224 | proc_create("sysinfo", 0444, NULL, &sysinfo_fops); |
1da177e4 LT |
225 | return 0; |
226 | } | |
0facaa17 | 227 | device_initcall(sysinfo_create_proc); |
1da177e4 | 228 | |
6bcac508 MS |
229 | /* |
230 | * Service levels interface. | |
231 | */ | |
232 | ||
233 | static DECLARE_RWSEM(service_level_sem); | |
234 | static LIST_HEAD(service_level_list); | |
235 | ||
236 | int register_service_level(struct service_level *slr) | |
237 | { | |
238 | struct service_level *ptr; | |
239 | ||
240 | down_write(&service_level_sem); | |
241 | list_for_each_entry(ptr, &service_level_list, list) | |
242 | if (ptr == slr) { | |
243 | up_write(&service_level_sem); | |
244 | return -EEXIST; | |
245 | } | |
246 | list_add_tail(&slr->list, &service_level_list); | |
247 | up_write(&service_level_sem); | |
248 | return 0; | |
249 | } | |
250 | EXPORT_SYMBOL(register_service_level); | |
251 | ||
252 | int unregister_service_level(struct service_level *slr) | |
253 | { | |
254 | struct service_level *ptr, *next; | |
255 | int rc = -ENOENT; | |
256 | ||
257 | down_write(&service_level_sem); | |
258 | list_for_each_entry_safe(ptr, next, &service_level_list, list) { | |
259 | if (ptr != slr) | |
260 | continue; | |
261 | list_del(&ptr->list); | |
262 | rc = 0; | |
263 | break; | |
264 | } | |
265 | up_write(&service_level_sem); | |
266 | return rc; | |
267 | } | |
268 | EXPORT_SYMBOL(unregister_service_level); | |
269 | ||
270 | static void *service_level_start(struct seq_file *m, loff_t *pos) | |
271 | { | |
272 | down_read(&service_level_sem); | |
273 | return seq_list_start(&service_level_list, *pos); | |
274 | } | |
275 | ||
276 | static void *service_level_next(struct seq_file *m, void *p, loff_t *pos) | |
277 | { | |
278 | return seq_list_next(p, &service_level_list, pos); | |
279 | } | |
280 | ||
281 | static void service_level_stop(struct seq_file *m, void *p) | |
282 | { | |
283 | up_read(&service_level_sem); | |
284 | } | |
285 | ||
286 | static int service_level_show(struct seq_file *m, void *p) | |
287 | { | |
288 | struct service_level *slr; | |
289 | ||
290 | slr = list_entry(p, struct service_level, list); | |
291 | slr->seq_print(m, slr); | |
292 | return 0; | |
293 | } | |
294 | ||
295 | static const struct seq_operations service_level_seq_ops = { | |
296 | .start = service_level_start, | |
297 | .next = service_level_next, | |
298 | .stop = service_level_stop, | |
299 | .show = service_level_show | |
300 | }; | |
301 | ||
302 | static int service_level_open(struct inode *inode, struct file *file) | |
303 | { | |
304 | return seq_open(file, &service_level_seq_ops); | |
305 | } | |
306 | ||
307 | static const struct file_operations service_level_ops = { | |
308 | .open = service_level_open, | |
309 | .read = seq_read, | |
310 | .llseek = seq_lseek, | |
311 | .release = seq_release | |
312 | }; | |
313 | ||
314 | static void service_level_vm_print(struct seq_file *m, | |
315 | struct service_level *slr) | |
316 | { | |
317 | char *query_buffer, *str; | |
318 | ||
319 | query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA); | |
320 | if (!query_buffer) | |
321 | return; | |
322 | cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL); | |
323 | str = strchr(query_buffer, '\n'); | |
324 | if (str) | |
325 | *str = 0; | |
326 | seq_printf(m, "VM: %s\n", query_buffer); | |
327 | kfree(query_buffer); | |
328 | } | |
329 | ||
330 | static struct service_level service_level_vm = { | |
331 | .seq_print = service_level_vm_print | |
332 | }; | |
333 | ||
334 | static __init int create_proc_service_level(void) | |
335 | { | |
336 | proc_create("service_levels", 0, NULL, &service_level_ops); | |
337 | if (MACHINE_IS_VM) | |
338 | register_service_level(&service_level_vm); | |
339 | return 0; | |
340 | } | |
6bcac508 MS |
341 | subsys_initcall(create_proc_service_level); |
342 | ||
31ee4b2f MS |
343 | /* |
344 | * CPU capability might have changed. Therefore recalculate loops_per_jiffy. | |
345 | */ | |
346 | void s390_adjust_jiffies(void) | |
347 | { | |
348 | struct sysinfo_1_2_2 *info; | |
349 | const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */ | |
350 | FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR); | |
351 | FP_DECL_EX; | |
352 | unsigned int capability; | |
353 | ||
354 | info = (void *) get_zeroed_page(GFP_KERNEL); | |
355 | if (!info) | |
356 | return; | |
357 | ||
358 | if (stsi(info, 1, 2, 2) != -ENOSYS) { | |
359 | /* | |
360 | * Major sigh. The cpu capability encoding is "special". | |
361 | * If the first 9 bits of info->capability are 0 then it | |
362 | * is a 32 bit unsigned integer in the range 0 .. 2^23. | |
363 | * If the first 9 bits are != 0 then it is a 32 bit float. | |
364 | * In addition a lower value indicates a proportionally | |
365 | * higher cpu capacity. Bogomips are the other way round. | |
366 | * To get to a halfway suitable number we divide 1e7 | |
367 | * by the cpu capability number. Yes, that means a floating | |
368 | * point division .. math-emu here we come :-) | |
369 | */ | |
370 | FP_UNPACK_SP(SA, &fmil); | |
371 | if ((info->capability >> 23) == 0) | |
5b479a79 | 372 | FP_FROM_INT_S(SB, (long) info->capability, 64, long); |
31ee4b2f MS |
373 | else |
374 | FP_UNPACK_SP(SB, &info->capability); | |
375 | FP_DIV_S(SR, SA, SB); | |
376 | FP_TO_INT_S(capability, SR, 32, 0); | |
377 | } else | |
378 | /* | |
379 | * Really old machine without stsi block for basic | |
380 | * cpu information. Report 42.0 bogomips. | |
381 | */ | |
382 | capability = 42; | |
383 | loops_per_jiffy = capability * (500000/HZ); | |
384 | free_page((unsigned long) info); | |
385 | } | |
386 | ||
387 | /* | |
388 | * calibrate the delay loop | |
389 | */ | |
6c81c32f | 390 | void __cpuinit calibrate_delay(void) |
31ee4b2f MS |
391 | { |
392 | s390_adjust_jiffies(); | |
393 | /* Print the good old Bogomips line .. */ | |
394 | printk(KERN_DEBUG "Calibrating delay loop (skipped)... " | |
395 | "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ), | |
396 | (loops_per_jiffy/(5000/HZ)) % 100); | |
397 | } |