device create: misc: convert device_create_drvdata to device_create
[linux-2.6.git] / drivers / s390 / sysinfo.c
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
8 #include <linux/kernel.h>
9 #include <linux/mm.h>
10 #include <linux/proc_fs.h>
11 #include <linux/init.h>
12 #include <linux/delay.h>
13 #include <asm/ebcdic.h>
14 #include <asm/sysinfo.h>
15
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
21 static inline int stsi_0(void)
22 {
23         int rc = stsi (NULL, 0, 0, 0);
24         return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28);
25 }
26
27 static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len)
28 {
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));
38         EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
39         EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
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);
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);
74         return len;
75 }
76
77 #if 0 /* Currently unused */
78 static int stsi_1_2_1(struct sysinfo_1_2_1 *info, char *page, int len)
79 {
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;
91 }
92 #endif
93
94 static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len)
95 {
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.
121                  * The user-space needs to know about the strange
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;
146 }
147
148 #if 0 /* Currently unused */
149 static int stsi_2_2_1(struct sysinfo_2_2_1 *info, char *page, int len)
150 {
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;
162 }
163 #endif
164
165 static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len)
166 {
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;
204 }
205
206 static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len)
207 {
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);
232         }
233         return len;
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 {
241         unsigned long info = get_zeroed_page (GFP_KERNEL);
242         int level, len;
243         
244         if (!info)
245                 return 0;
246
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);
251
252         if (level >= 1)
253                 len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len);
254
255         if (level >= 2)
256                 len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len);
257
258         if (level >= 3)
259                 len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len);
260
261         free_page (info);
262         return len;
263 }
264
265 static __init int create_proc_sysinfo(void)
266 {
267         create_proc_read_entry("sysinfo", 0444, NULL,
268                                proc_read_sysinfo, NULL);
269         return 0;
270 }
271
272 __initcall(create_proc_sysinfo);
273
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
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  */
339 void __cpuinit calibrate_delay(void)
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 }