Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * drivers/s390/sysinfo.c | |
3 | * | |
4 | * Copyright (C) 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation | |
5 | * Author(s): Ulrich Weigand (Ulrich.Weigand@de.ibm.com) | |
6 | */ | |
7 | ||
1da177e4 LT |
8 | #include <linux/kernel.h> |
9 | #include <linux/mm.h> | |
10 | #include <linux/proc_fs.h> | |
11 | #include <linux/init.h> | |
31ee4b2f | 12 | #include <linux/delay.h> |
1da177e4 | 13 | #include <asm/ebcdic.h> |
aa24f7f0 | 14 | #include <asm/sysinfo.h> |
1da177e4 | 15 | |
31ee4b2f MS |
16 | /* Sigh, math-emu. Don't ask. */ |
17 | #include <asm/sfp-util.h> | |
18 | #include <math-emu/soft-fp.h> | |
19 | #include <math-emu/single.h> | |
20 | ||
0fee644a | 21 | static inline int stsi_0(void) |
1da177e4 LT |
22 | { |
23 | int rc = stsi (NULL, 0, 0, 0); | |
0fee644a | 24 | return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28); |
1da177e4 LT |
25 | } |
26 | ||
0fee644a | 27 | static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len) |
1da177e4 | 28 | { |
0fee644a MS |
29 | if (stsi(info, 1, 1, 1) == -ENOSYS) |
30 | return len; | |
31 | ||
32 | EBCASC(info->manufacturer, sizeof(info->manufacturer)); | |
33 | EBCASC(info->type, sizeof(info->type)); | |
34 | EBCASC(info->model, sizeof(info->model)); | |
35 | EBCASC(info->sequence, sizeof(info->sequence)); | |
36 | EBCASC(info->plant, sizeof(info->plant)); | |
37 | EBCASC(info->model_capacity, sizeof(info->model_capacity)); | |
cbce70e6 MS |
38 | EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap)); |
39 | EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap)); | |
0fee644a MS |
40 | len += sprintf(page + len, "Manufacturer: %-16.16s\n", |
41 | info->manufacturer); | |
42 | len += sprintf(page + len, "Type: %-4.4s\n", | |
43 | info->type); | |
44 | if (info->model[0] != '\0') | |
45 | /* | |
46 | * Sigh: the model field has been renamed with System z9 | |
47 | * to model_capacity and a new model field has been added | |
48 | * after the plant field. To avoid confusing older programs | |
49 | * the "Model:" prints "model_capacity model" or just | |
50 | * "model_capacity" if the model string is empty . | |
51 | */ | |
52 | len += sprintf(page + len, | |
53 | "Model: %-16.16s %-16.16s\n", | |
54 | info->model_capacity, info->model); | |
55 | else | |
56 | len += sprintf(page + len, "Model: %-16.16s\n", | |
57 | info->model_capacity); | |
58 | len += sprintf(page + len, "Sequence Code: %-16.16s\n", | |
59 | info->sequence); | |
60 | len += sprintf(page + len, "Plant: %-4.4s\n", | |
61 | info->plant); | |
cbce70e6 MS |
62 | len += sprintf(page + len, "Model Capacity: %-16.16s %08u\n", |
63 | info->model_capacity, *(u32 *) info->model_cap_rating); | |
64 | if (info->model_perm_cap[0] != '\0') | |
65 | len += sprintf(page + len, | |
66 | "Model Perm. Capacity: %-16.16s %08u\n", | |
67 | info->model_perm_cap, | |
68 | *(u32 *) info->model_perm_cap_rating); | |
69 | if (info->model_temp_cap[0] != '\0') | |
70 | len += sprintf(page + len, | |
71 | "Model Temp. Capacity: %-16.16s %08u\n", | |
72 | info->model_temp_cap, | |
73 | *(u32 *) info->model_temp_cap_rating); | |
0fee644a | 74 | return len; |
1da177e4 LT |
75 | } |
76 | ||
0fee644a MS |
77 | #if 0 /* Currently unused */ |
78 | static int stsi_1_2_1(struct sysinfo_1_2_1 *info, char *page, int len) | |
1da177e4 | 79 | { |
0fee644a MS |
80 | if (stsi(info, 1, 2, 1) == -ENOSYS) |
81 | return len; | |
82 | ||
83 | len += sprintf(page + len, "\n"); | |
84 | EBCASC(info->sequence, sizeof(info->sequence)); | |
85 | EBCASC(info->plant, sizeof(info->plant)); | |
86 | len += sprintf(page + len, "Sequence Code of CPU: %-16.16s\n", | |
87 | info->sequence); | |
88 | len += sprintf(page + len, "Plant of CPU: %-16.16s\n", | |
89 | info->plant); | |
90 | return len; | |
1da177e4 | 91 | } |
0fee644a | 92 | #endif |
1da177e4 | 93 | |
0fee644a | 94 | static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len) |
1da177e4 | 95 | { |
0fee644a MS |
96 | struct sysinfo_1_2_2_extension *ext; |
97 | int i; | |
98 | ||
99 | if (stsi(info, 1, 2, 2) == -ENOSYS) | |
100 | return len; | |
101 | ext = (struct sysinfo_1_2_2_extension *) | |
102 | ((unsigned long) info + info->acc_offset); | |
103 | ||
104 | len += sprintf(page + len, "\n"); | |
105 | len += sprintf(page + len, "CPUs Total: %d\n", | |
106 | info->cpus_total); | |
107 | len += sprintf(page + len, "CPUs Configured: %d\n", | |
108 | info->cpus_configured); | |
109 | len += sprintf(page + len, "CPUs Standby: %d\n", | |
110 | info->cpus_standby); | |
111 | len += sprintf(page + len, "CPUs Reserved: %d\n", | |
112 | info->cpus_reserved); | |
113 | ||
114 | if (info->format == 1) { | |
115 | /* | |
116 | * Sigh 2. According to the specification the alternate | |
117 | * capability field is a 32 bit floating point number | |
118 | * if the higher order 8 bits are not zero. Printing | |
119 | * a floating point number in the kernel is a no-no, | |
120 | * always print the number as 32 bit unsigned integer. | |
31ee4b2f | 121 | * The user-space needs to know about the strange |
0fee644a MS |
122 | * encoding of the alternate cpu capability. |
123 | */ | |
124 | len += sprintf(page + len, "Capability: %u %u\n", | |
125 | info->capability, ext->alt_capability); | |
126 | for (i = 2; i <= info->cpus_total; i++) | |
127 | len += sprintf(page + len, | |
128 | "Adjustment %02d-way: %u %u\n", | |
129 | i, info->adjustment[i-2], | |
130 | ext->alt_adjustment[i-2]); | |
131 | ||
132 | } else { | |
133 | len += sprintf(page + len, "Capability: %u\n", | |
134 | info->capability); | |
135 | for (i = 2; i <= info->cpus_total; i++) | |
136 | len += sprintf(page + len, | |
137 | "Adjustment %02d-way: %u\n", | |
138 | i, info->adjustment[i-2]); | |
139 | } | |
140 | ||
141 | if (info->secondary_capability != 0) | |
142 | len += sprintf(page + len, "Secondary Capability: %d\n", | |
143 | info->secondary_capability); | |
144 | ||
145 | return len; | |
1da177e4 LT |
146 | } |
147 | ||
0fee644a MS |
148 | #if 0 /* Currently unused */ |
149 | static int stsi_2_2_1(struct sysinfo_2_2_1 *info, char *page, int len) | |
1da177e4 | 150 | { |
0fee644a MS |
151 | if (stsi(info, 2, 2, 1) == -ENOSYS) |
152 | return len; | |
153 | ||
154 | len += sprintf(page + len, "\n"); | |
155 | EBCASC (info->sequence, sizeof(info->sequence)); | |
156 | EBCASC (info->plant, sizeof(info->plant)); | |
157 | len += sprintf(page + len, "Sequence Code of logical CPU: %-16.16s\n", | |
158 | info->sequence); | |
159 | len += sprintf(page + len, "Plant of logical CPU: %-16.16s\n", | |
160 | info->plant); | |
161 | return len; | |
1da177e4 | 162 | } |
0fee644a | 163 | #endif |
1da177e4 | 164 | |
0fee644a | 165 | static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len) |
1da177e4 | 166 | { |
0fee644a MS |
167 | if (stsi(info, 2, 2, 2) == -ENOSYS) |
168 | return len; | |
169 | ||
170 | EBCASC (info->name, sizeof(info->name)); | |
171 | ||
172 | len += sprintf(page + len, "\n"); | |
173 | len += sprintf(page + len, "LPAR Number: %d\n", | |
174 | info->lpar_number); | |
175 | ||
176 | len += sprintf(page + len, "LPAR Characteristics: "); | |
177 | if (info->characteristics & LPAR_CHAR_DEDICATED) | |
178 | len += sprintf(page + len, "Dedicated "); | |
179 | if (info->characteristics & LPAR_CHAR_SHARED) | |
180 | len += sprintf(page + len, "Shared "); | |
181 | if (info->characteristics & LPAR_CHAR_LIMITED) | |
182 | len += sprintf(page + len, "Limited "); | |
183 | len += sprintf(page + len, "\n"); | |
184 | ||
185 | len += sprintf(page + len, "LPAR Name: %-8.8s\n", | |
186 | info->name); | |
187 | ||
188 | len += sprintf(page + len, "LPAR Adjustment: %d\n", | |
189 | info->caf); | |
190 | ||
191 | len += sprintf(page + len, "LPAR CPUs Total: %d\n", | |
192 | info->cpus_total); | |
193 | len += sprintf(page + len, "LPAR CPUs Configured: %d\n", | |
194 | info->cpus_configured); | |
195 | len += sprintf(page + len, "LPAR CPUs Standby: %d\n", | |
196 | info->cpus_standby); | |
197 | len += sprintf(page + len, "LPAR CPUs Reserved: %d\n", | |
198 | info->cpus_reserved); | |
199 | len += sprintf(page + len, "LPAR CPUs Dedicated: %d\n", | |
200 | info->cpus_dedicated); | |
201 | len += sprintf(page + len, "LPAR CPUs Shared: %d\n", | |
202 | info->cpus_shared); | |
203 | return len; | |
1da177e4 LT |
204 | } |
205 | ||
0fee644a | 206 | static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len) |
1da177e4 | 207 | { |
0fee644a MS |
208 | int i; |
209 | ||
210 | if (stsi(info, 3, 2, 2) == -ENOSYS) | |
211 | return len; | |
212 | for (i = 0; i < info->count; i++) { | |
213 | EBCASC (info->vm[i].name, sizeof(info->vm[i].name)); | |
214 | EBCASC (info->vm[i].cpi, sizeof(info->vm[i].cpi)); | |
215 | len += sprintf(page + len, "\n"); | |
216 | len += sprintf(page + len, "VM%02d Name: %-8.8s\n", | |
217 | i, info->vm[i].name); | |
218 | len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n", | |
219 | i, info->vm[i].cpi); | |
220 | ||
221 | len += sprintf(page + len, "VM%02d Adjustment: %d\n", | |
222 | i, info->vm[i].caf); | |
223 | ||
224 | len += sprintf(page + len, "VM%02d CPUs Total: %d\n", | |
225 | i, info->vm[i].cpus_total); | |
226 | len += sprintf(page + len, "VM%02d CPUs Configured: %d\n", | |
227 | i, info->vm[i].cpus_configured); | |
228 | len += sprintf(page + len, "VM%02d CPUs Standby: %d\n", | |
229 | i, info->vm[i].cpus_standby); | |
230 | len += sprintf(page + len, "VM%02d CPUs Reserved: %d\n", | |
231 | i, info->vm[i].cpus_reserved); | |
1da177e4 | 232 | } |
0fee644a | 233 | return len; |
1da177e4 LT |
234 | } |
235 | ||
236 | ||
237 | static int proc_read_sysinfo(char *page, char **start, | |
238 | off_t off, int count, | |
239 | int *eof, void *data) | |
240 | { | |
0fee644a MS |
241 | unsigned long info = get_zeroed_page (GFP_KERNEL); |
242 | int level, len; | |
1da177e4 LT |
243 | |
244 | if (!info) | |
245 | return 0; | |
246 | ||
0fee644a MS |
247 | len = 0; |
248 | level = stsi_0(); | |
249 | if (level >= 1) | |
250 | len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len); | |
1da177e4 | 251 | |
0fee644a MS |
252 | if (level >= 1) |
253 | len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len); | |
1da177e4 | 254 | |
0fee644a MS |
255 | if (level >= 2) |
256 | len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len); | |
1da177e4 | 257 | |
0fee644a MS |
258 | if (level >= 3) |
259 | len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len); | |
1da177e4 | 260 | |
0fee644a | 261 | free_page (info); |
1da177e4 LT |
262 | return len; |
263 | } | |
264 | ||
265 | static __init int create_proc_sysinfo(void) | |
266 | { | |
0fee644a MS |
267 | create_proc_read_entry("sysinfo", 0444, NULL, |
268 | proc_read_sysinfo, NULL); | |
1da177e4 LT |
269 | return 0; |
270 | } | |
271 | ||
272 | __initcall(create_proc_sysinfo); | |
273 | ||
2fc2d1e9 HC |
274 | int get_cpu_capability(unsigned int *capability) |
275 | { | |
276 | struct sysinfo_1_2_2 *info; | |
277 | int rc; | |
278 | ||
279 | info = (void *) get_zeroed_page(GFP_KERNEL); | |
280 | if (!info) | |
281 | return -ENOMEM; | |
282 | rc = stsi(info, 1, 2, 2); | |
283 | if (rc == -ENOSYS) | |
284 | goto out; | |
285 | rc = 0; | |
286 | *capability = info->capability; | |
287 | out: | |
288 | free_page((unsigned long) info); | |
289 | return rc; | |
290 | } | |
291 | ||
31ee4b2f MS |
292 | /* |
293 | * CPU capability might have changed. Therefore recalculate loops_per_jiffy. | |
294 | */ | |
295 | void s390_adjust_jiffies(void) | |
296 | { | |
297 | struct sysinfo_1_2_2 *info; | |
298 | const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */ | |
299 | FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR); | |
300 | FP_DECL_EX; | |
301 | unsigned int capability; | |
302 | ||
303 | info = (void *) get_zeroed_page(GFP_KERNEL); | |
304 | if (!info) | |
305 | return; | |
306 | ||
307 | if (stsi(info, 1, 2, 2) != -ENOSYS) { | |
308 | /* | |
309 | * Major sigh. The cpu capability encoding is "special". | |
310 | * If the first 9 bits of info->capability are 0 then it | |
311 | * is a 32 bit unsigned integer in the range 0 .. 2^23. | |
312 | * If the first 9 bits are != 0 then it is a 32 bit float. | |
313 | * In addition a lower value indicates a proportionally | |
314 | * higher cpu capacity. Bogomips are the other way round. | |
315 | * To get to a halfway suitable number we divide 1e7 | |
316 | * by the cpu capability number. Yes, that means a floating | |
317 | * point division .. math-emu here we come :-) | |
318 | */ | |
319 | FP_UNPACK_SP(SA, &fmil); | |
320 | if ((info->capability >> 23) == 0) | |
321 | FP_FROM_INT_S(SB, info->capability, 32, int); | |
322 | else | |
323 | FP_UNPACK_SP(SB, &info->capability); | |
324 | FP_DIV_S(SR, SA, SB); | |
325 | FP_TO_INT_S(capability, SR, 32, 0); | |
326 | } else | |
327 | /* | |
328 | * Really old machine without stsi block for basic | |
329 | * cpu information. Report 42.0 bogomips. | |
330 | */ | |
331 | capability = 42; | |
332 | loops_per_jiffy = capability * (500000/HZ); | |
333 | free_page((unsigned long) info); | |
334 | } | |
335 | ||
336 | /* | |
337 | * calibrate the delay loop | |
338 | */ | |
6c81c32f | 339 | void __cpuinit calibrate_delay(void) |
31ee4b2f MS |
340 | { |
341 | s390_adjust_jiffies(); | |
342 | /* Print the good old Bogomips line .. */ | |
343 | printk(KERN_DEBUG "Calibrating delay loop (skipped)... " | |
344 | "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ), | |
345 | (loops_per_jiffy/(5000/HZ)) % 100); | |
346 | } |