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 <asm/ebcdic.h>
  13
  14 struct sysinfo_1_1_1 {
  15         char reserved_0[32];
  16         char manufacturer[16];
  17         char type[4];
  18         char reserved_1[12];
  19         char model_capacity[16];
  20         char sequence[16];
  21         char plant[4];
  22         char model[16];
  23 };
  24
  25 struct sysinfo_1_2_1 {
  26         char reserved_0[80];
  27         char sequence[16];
  28         char plant[4];
  29         char reserved_1[2];
  30         unsigned short cpu_address;
  31 };
  32
  33 struct sysinfo_1_2_2 {
  34         char format;
  35         char reserved_0[1];
  36         unsigned short acc_offset;
  37         char reserved_1[24];
  38         unsigned int secondary_capability;
  39         unsigned int capability;
  40         unsigned short cpus_total;
  41         unsigned short cpus_configured;
  42         unsigned short cpus_standby;
  43         unsigned short cpus_reserved;
  44         unsigned short adjustment[0];
  45 };
  46
  47 struct sysinfo_1_2_2_extension {
  48         unsigned int alt_capability;
  49         unsigned short alt_adjustment[0];
  50 };
  51
  52 struct sysinfo_2_2_1 {
  53         char reserved_0[80];
  54         char sequence[16];
  55         char plant[4];
  56         unsigned short cpu_id;
  57         unsigned short cpu_address;
  58 };
  59
  60 struct sysinfo_2_2_2 {
  61         char reserved_0[32];
  62         unsigned short lpar_number;
  63         char reserved_1;
  64         unsigned char characteristics;
  65         unsigned short cpus_total;
  66         unsigned short cpus_configured;
  67         unsigned short cpus_standby;
  68         unsigned short cpus_reserved;
  69         char name[8];
  70         unsigned int caf;
  71         char reserved_2[16];
  72         unsigned short cpus_dedicated;
  73         unsigned short cpus_shared;
  74 };
  75
  76 #define LPAR_CHAR_DEDICATED     (1 << 7)
  77 #define LPAR_CHAR_SHARED        (1 << 6)
  78 #define LPAR_CHAR_LIMITED       (1 << 5)
  79
  80 struct sysinfo_3_2_2 {
  81         char reserved_0[31];
  82         unsigned char count;
  83         struct {
  84                 char reserved_0[4];
  85                 unsigned short cpus_total;
  86                 unsigned short cpus_configured;
  87                 unsigned short cpus_standby;
  88                 unsigned short cpus_reserved;
  89                 char name[8];
  90                 unsigned int caf;
  91                 char cpi[16];
  92                 char reserved_1[24];
  93
  94         } vm[8];
  95 };
  96
  97 static inline int stsi(void *sysinfo, int fc, int sel1, int sel2)
  98 {
  99         register int r0 asm("0") = (fc << 28) | sel1;
 100         register int r1 asm("1") = sel2;
 101
 102         asm volatile(
 103                 "   stsi 0(%2)\n"
 104                 "0: jz   2f\n"
 105                 "1: lhi  %0,%3\n"
 106                 "2:\n"
 107                 EX_TABLE(0b,1b)
 108                 : "+d" (r0) : "d" (r1), "a" (sysinfo), "K" (-ENOSYS)
 109                 : "cc", "memory" );
 110         return r0;
 111 }
 112
 113 static inline int stsi_0(void)
 114 {
 115         int rc = stsi (NULL, 0, 0, 0);
 116         return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28);
 117 }
 118
 119 static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len)
 120 {
 121         if (stsi(info, 1, 1, 1) == -ENOSYS)
 122                 return len;
 123
 124         EBCASC(info->manufacturer, sizeof(info->manufacturer));
 125         EBCASC(info->type, sizeof(info->type));
 126         EBCASC(info->model, sizeof(info->model));
 127         EBCASC(info->sequence, sizeof(info->sequence));
 128         EBCASC(info->plant, sizeof(info->plant));
 129         EBCASC(info->model_capacity, sizeof(info->model_capacity));
 130         len += sprintf(page + len, "Manufacturer:         %-16.16s\n",
 131                        info->manufacturer);
 132         len += sprintf(page + len, "Type:                 %-4.4s\n",
 133                        info->type);
 134         if (info->model[0] != '\0')
 135                 /*
 136                  * Sigh: the model field has been renamed with System z9
 137                  * to model_capacity and a new model field has been added
 138                  * after the plant field. To avoid confusing older programs
 139                  * the "Model:" prints "model_capacity model" or just
 140                  * "model_capacity" if the model string is empty .
 141                  */
 142                 len += sprintf(page + len,
 143                                "Model:                %-16.16s %-16.16s\n",
 144                                info->model_capacity, info->model);
 145         else
 146                 len += sprintf(page + len, "Model:                %-16.16s\n",
 147                                info->model_capacity);
 148         len += sprintf(page + len, "Sequence Code:        %-16.16s\n",
 149                        info->sequence);
 150         len += sprintf(page + len, "Plant:                %-4.4s\n",
 151                        info->plant);
 152         len += sprintf(page + len, "Model Capacity:       %-16.16s\n",
 153                        info->model_capacity);
 154         return len;
 155 }
 156
 157 #if 0 /* Currently unused */
 158 static int stsi_1_2_1(struct sysinfo_1_2_1 *info, char *page, int len)
 159 {
 160         if (stsi(info, 1, 2, 1) == -ENOSYS)
 161                 return len;
 162
 163         len += sprintf(page + len, "\n");
 164         EBCASC(info->sequence, sizeof(info->sequence));
 165         EBCASC(info->plant, sizeof(info->plant));
 166         len += sprintf(page + len, "Sequence Code of CPU: %-16.16s\n",
 167                        info->sequence);
 168         len += sprintf(page + len, "Plant of CPU:         %-16.16s\n",
 169                        info->plant);
 170         return len;
 171 }
 172 #endif
 173
 174 static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len)
 175 {
 176         struct sysinfo_1_2_2_extension *ext;
 177         int i;
 178
 179         if (stsi(info, 1, 2, 2) == -ENOSYS)
 180                 return len;
 181         ext = (struct sysinfo_1_2_2_extension *)
 182                 ((unsigned long) info + info->acc_offset);
 183
 184         len += sprintf(page + len, "\n");
 185         len += sprintf(page + len, "CPUs Total:           %d\n",
 186                        info->cpus_total);
 187         len += sprintf(page + len, "CPUs Configured:      %d\n",
 188                        info->cpus_configured);
 189         len += sprintf(page + len, "CPUs Standby:         %d\n",
 190                        info->cpus_standby);
 191         len += sprintf(page + len, "CPUs Reserved:        %d\n",
 192                        info->cpus_reserved);
 193
 194         if (info->format == 1) {
 195                 /*
 196                  * Sigh 2. According to the specification the alternate
 197                  * capability field is a 32 bit floating point number
 198                  * if the higher order 8 bits are not zero. Printing
 199                  * a floating point number in the kernel is a no-no,
 200                  * always print the number as 32 bit unsigned integer.
 201                  * The user-space needs to know about the stange
 202                  * encoding of the alternate cpu capability.
 203                  */
 204                 len += sprintf(page + len, "Capability:           %u %u\n",
 205                                info->capability, ext->alt_capability);
 206                 for (i = 2; i <= info->cpus_total; i++)
 207                         len += sprintf(page + len,
 208                                        "Adjustment %02d-way:    %u %u\n",
 209                                        i, info->adjustment[i-2],
 210                                        ext->alt_adjustment[i-2]);
 211
 212         } else {
 213                 len += sprintf(page + len, "Capability:           %u\n",
 214                                info->capability);
 215                 for (i = 2; i <= info->cpus_total; i++)
 216                         len += sprintf(page + len,
 217                                        "Adjustment %02d-way:    %u\n",
 218                                        i, info->adjustment[i-2]);
 219         }
 220
 221         if (info->secondary_capability != 0)
 222                 len += sprintf(page + len, "Secondary Capability: %d\n",
 223                                info->secondary_capability);
 224
 225         return len;
 226 }
 227
 228 #if 0 /* Currently unused */
 229 static int stsi_2_2_1(struct sysinfo_2_2_1 *info, char *page, int len)
 230 {
 231         if (stsi(info, 2, 2, 1) == -ENOSYS)
 232                 return len;
 233
 234         len += sprintf(page + len, "\n");
 235         EBCASC (info->sequence, sizeof(info->sequence));
 236         EBCASC (info->plant, sizeof(info->plant));
 237         len += sprintf(page + len, "Sequence Code of logical CPU: %-16.16s\n",
 238                        info->sequence);
 239         len += sprintf(page + len, "Plant of logical CPU: %-16.16s\n",
 240                        info->plant);
 241         return len;
 242 }
 243 #endif
 244
 245 static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len)
 246 {
 247         if (stsi(info, 2, 2, 2) == -ENOSYS)
 248                 return len;
 249
 250         EBCASC (info->name, sizeof(info->name));
 251
 252         len += sprintf(page + len, "\n");
 253         len += sprintf(page + len, "LPAR Number:          %d\n",
 254                        info->lpar_number);
 255
 256         len += sprintf(page + len, "LPAR Characteristics: ");
 257         if (info->characteristics & LPAR_CHAR_DEDICATED)
 258                 len += sprintf(page + len, "Dedicated ");
 259         if (info->characteristics & LPAR_CHAR_SHARED)
 260                 len += sprintf(page + len, "Shared ");
 261         if (info->characteristics & LPAR_CHAR_LIMITED)
 262                 len += sprintf(page + len, "Limited ");
 263         len += sprintf(page + len, "\n");
 264
 265         len += sprintf(page + len, "LPAR Name:            %-8.8s\n",
 266                        info->name);
 267
 268         len += sprintf(page + len, "LPAR Adjustment:      %d\n",
 269                        info->caf);
 270
 271         len += sprintf(page + len, "LPAR CPUs Total:      %d\n",
 272                        info->cpus_total);
 273         len += sprintf(page + len, "LPAR CPUs Configured: %d\n",
 274                        info->cpus_configured);
 275         len += sprintf(page + len, "LPAR CPUs Standby:    %d\n",
 276                        info->cpus_standby);
 277         len += sprintf(page + len, "LPAR CPUs Reserved:   %d\n",
 278                        info->cpus_reserved);
 279         len += sprintf(page + len, "LPAR CPUs Dedicated:  %d\n",
 280                        info->cpus_dedicated);
 281         len += sprintf(page + len, "LPAR CPUs Shared:     %d\n",
 282                        info->cpus_shared);
 283         return len;
 284 }
 285
 286 static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len)
 287 {
 288         int i;
 289
 290         if (stsi(info, 3, 2, 2) == -ENOSYS)
 291                 return len;
 292         for (i = 0; i < info->count; i++) {
 293                 EBCASC (info->vm[i].name, sizeof(info->vm[i].name));
 294                 EBCASC (info->vm[i].cpi, sizeof(info->vm[i].cpi));
 295                 len += sprintf(page + len, "\n");
 296                 len += sprintf(page + len, "VM%02d Name:            %-8.8s\n",
 297                                i, info->vm[i].name);
 298                 len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n",
 299                                i, info->vm[i].cpi);
 300
 301                 len += sprintf(page + len, "VM%02d Adjustment:      %d\n",
 302                                i, info->vm[i].caf);
 303
 304                 len += sprintf(page + len, "VM%02d CPUs Total:      %d\n",
 305                                i, info->vm[i].cpus_total);
 306                 len += sprintf(page + len, "VM%02d CPUs Configured: %d\n",
 307                                i, info->vm[i].cpus_configured);
 308                 len += sprintf(page + len, "VM%02d CPUs Standby:    %d\n",
 309                                i, info->vm[i].cpus_standby);
 310                 len += sprintf(page + len, "VM%02d CPUs Reserved:   %d\n",
 311                                i, info->vm[i].cpus_reserved);
 312         }
 313         return len;
 314 }
 315
 316
 317 static int proc_read_sysinfo(char *page, char **start,
 318                              off_t off, int count,
 319                              int *eof, void *data)
 320 {
 321         unsigned long info = get_zeroed_page (GFP_KERNEL);
 322         int level, len;
 323
 324         if (!info)
 325                 return 0;
 326
 327         len = 0;
 328         level = stsi_0();
 329         if (level >= 1)
 330                 len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len);
 331
 332         if (level >= 1)
 333                 len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len);
 334
 335         if (level >= 2)
 336                 len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len);
 337
 338         if (level >= 3)
 339                 len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len);
 340
 341         free_page (info);
 342         return len;
 343 }
 344
 345 static __init int create_proc_sysinfo(void)
 346 {
 347         create_proc_read_entry("sysinfo", 0444, NULL,
 348                                proc_read_sysinfo, NULL);
 349         return 0;
 350 }
 351
 352 __initcall(create_proc_sysinfo);
 353