1 /* 2 * Copyright IBM Corp. 2001, 2009 3 * Author(s): Ulrich Weigand <Ulrich.Weigand@de.ibm.com>, 4 * Martin Schwidefsky <schwidefsky@de.ibm.com>, 5 */ 6 7 #include <linux/kernel.h> 8 #include <linux/mm.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 19 /* Sigh, math-emu. Don't ask. */ 20 #include <asm/sfp-util.h> 21 #include <math-emu/soft-fp.h> 22 #include <math-emu/single.h> 23 24 static inline int stsi_0(void) 25 { 26 int rc = stsi(NULL, 0, 0, 0); 27 return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28); 28 } 29 30 static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len) 31 { 32 if (stsi(info, 1, 1, 1) == -ENOSYS) 33 return len; 34 35 EBCASC(info->manufacturer, sizeof(info->manufacturer)); 36 EBCASC(info->type, sizeof(info->type)); 37 EBCASC(info->model, sizeof(info->model)); 38 EBCASC(info->sequence, sizeof(info->sequence)); 39 EBCASC(info->plant, sizeof(info->plant)); 40 EBCASC(info->model_capacity, sizeof(info->model_capacity)); 41 EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap)); 42 EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap)); 43 len += sprintf(page + len, "Manufacturer: %-16.16s\n", 44 info->manufacturer); 45 len += sprintf(page + len, "Type: %-4.4s\n", 46 info->type); 47 if (info->model[0] != '\0') 48 /* 49 * Sigh: the model field has been renamed with System z9 50 * to model_capacity and a new model field has been added 51 * after the plant field. To avoid confusing older programs 52 * the "Model:" prints "model_capacity model" or just 53 * "model_capacity" if the model string is empty . 54 */ 55 len += sprintf(page + len, 56 "Model: %-16.16s %-16.16s\n", 57 info->model_capacity, info->model); 58 else 59 len += sprintf(page + len, "Model: %-16.16s\n", 60 info->model_capacity); 61 len += sprintf(page + len, "Sequence Code: %-16.16s\n", 62 info->sequence); 63 len += sprintf(page + len, "Plant: %-4.4s\n", 64 info->plant); 65 len += sprintf(page + len, "Model Capacity: %-16.16s %08u\n", 66 info->model_capacity, *(u32 *) info->model_cap_rating); 67 if (info->model_perm_cap[0] != '\0') 68 len += sprintf(page + len, 69 "Model Perm. Capacity: %-16.16s %08u\n", 70 info->model_perm_cap, 71 *(u32 *) info->model_perm_cap_rating); 72 if (info->model_temp_cap[0] != '\0') 73 len += sprintf(page + len, 74 "Model Temp. Capacity: %-16.16s %08u\n", 75 info->model_temp_cap, 76 *(u32 *) info->model_temp_cap_rating); 77 return len; 78 } 79 80 static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len) 81 { 82 struct sysinfo_1_2_2_extension *ext; 83 int i; 84 85 if (stsi(info, 1, 2, 2) == -ENOSYS) 86 return len; 87 ext = (struct sysinfo_1_2_2_extension *) 88 ((unsigned long) info + info->acc_offset); 89 90 len += sprintf(page + len, "\n"); 91 len += sprintf(page + len, "CPUs Total: %d\n", 92 info->cpus_total); 93 len += sprintf(page + len, "CPUs Configured: %d\n", 94 info->cpus_configured); 95 len += sprintf(page + len, "CPUs Standby: %d\n", 96 info->cpus_standby); 97 len += sprintf(page + len, "CPUs Reserved: %d\n", 98 info->cpus_reserved); 99 100 if (info->format == 1) { 101 /* 102 * Sigh 2. According to the specification the alternate 103 * capability field is a 32 bit floating point number 104 * if the higher order 8 bits are not zero. Printing 105 * a floating point number in the kernel is a no-no, 106 * always print the number as 32 bit unsigned integer. 107 * The user-space needs to know about the strange 108 * encoding of the alternate cpu capability. 109 */ 110 len += sprintf(page + len, "Capability: %u %u\n", 111 info->capability, ext->alt_capability); 112 for (i = 2; i <= info->cpus_total; i++) 113 len += sprintf(page + len, 114 "Adjustment %02d-way: %u %u\n", 115 i, info->adjustment[i-2], 116 ext->alt_adjustment[i-2]); 117 118 } else { 119 len += sprintf(page + len, "Capability: %u\n", 120 info->capability); 121 for (i = 2; i <= info->cpus_total; i++) 122 len += sprintf(page + len, 123 "Adjustment %02d-way: %u\n", 124 i, info->adjustment[i-2]); 125 } 126 127 if (info->secondary_capability != 0) 128 len += sprintf(page + len, "Secondary Capability: %d\n", 129 info->secondary_capability); 130 return len; 131 } 132 133 static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len) 134 { 135 if (stsi(info, 2, 2, 2) == -ENOSYS) 136 return len; 137 138 EBCASC(info->name, sizeof(info->name)); 139 140 len += sprintf(page + len, "\n"); 141 len += sprintf(page + len, "LPAR Number: %d\n", 142 info->lpar_number); 143 144 len += sprintf(page + len, "LPAR Characteristics: "); 145 if (info->characteristics & LPAR_CHAR_DEDICATED) 146 len += sprintf(page + len, "Dedicated "); 147 if (info->characteristics & LPAR_CHAR_SHARED) 148 len += sprintf(page + len, "Shared "); 149 if (info->characteristics & LPAR_CHAR_LIMITED) 150 len += sprintf(page + len, "Limited "); 151 len += sprintf(page + len, "\n"); 152 153 len += sprintf(page + len, "LPAR Name: %-8.8s\n", 154 info->name); 155 156 len += sprintf(page + len, "LPAR Adjustment: %d\n", 157 info->caf); 158 159 len += sprintf(page + len, "LPAR CPUs Total: %d\n", 160 info->cpus_total); 161 len += sprintf(page + len, "LPAR CPUs Configured: %d\n", 162 info->cpus_configured); 163 len += sprintf(page + len, "LPAR CPUs Standby: %d\n", 164 info->cpus_standby); 165 len += sprintf(page + len, "LPAR CPUs Reserved: %d\n", 166 info->cpus_reserved); 167 len += sprintf(page + len, "LPAR CPUs Dedicated: %d\n", 168 info->cpus_dedicated); 169 len += sprintf(page + len, "LPAR CPUs Shared: %d\n", 170 info->cpus_shared); 171 return len; 172 } 173 174 static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len) 175 { 176 int i; 177 178 if (stsi(info, 3, 2, 2) == -ENOSYS) 179 return len; 180 for (i = 0; i < info->count; i++) { 181 EBCASC(info->vm[i].name, sizeof(info->vm[i].name)); 182 EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi)); 183 len += sprintf(page + len, "\n"); 184 len += sprintf(page + len, "VM%02d Name: %-8.8s\n", 185 i, info->vm[i].name); 186 len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n", 187 i, info->vm[i].cpi); 188 189 len += sprintf(page + len, "VM%02d Adjustment: %d\n", 190 i, info->vm[i].caf); 191 192 len += sprintf(page + len, "VM%02d CPUs Total: %d\n", 193 i, info->vm[i].cpus_total); 194 len += sprintf(page + len, "VM%02d CPUs Configured: %d\n", 195 i, info->vm[i].cpus_configured); 196 len += sprintf(page + len, "VM%02d CPUs Standby: %d\n", 197 i, info->vm[i].cpus_standby); 198 len += sprintf(page + len, "VM%02d CPUs Reserved: %d\n", 199 i, info->vm[i].cpus_reserved); 200 } 201 return len; 202 } 203 204 static int proc_read_sysinfo(char *page, char **start, 205 off_t off, int count, 206 int *eof, void *data) 207 { 208 unsigned long info = get_zeroed_page(GFP_KERNEL); 209 int level, len; 210 211 if (!info) 212 return 0; 213 214 len = 0; 215 level = stsi_0(); 216 if (level >= 1) 217 len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len); 218 219 if (level >= 1) 220 len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len); 221 222 if (level >= 2) 223 len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len); 224 225 if (level >= 3) 226 len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len); 227 228 free_page(info); 229 return len; 230 } 231 232 static __init int create_proc_sysinfo(void) 233 { 234 create_proc_read_entry("sysinfo", 0444, NULL, 235 proc_read_sysinfo, NULL); 236 return 0; 237 } 238 device_initcall(create_proc_sysinfo); 239 240 /* 241 * Service levels interface. 242 */ 243 244 static DECLARE_RWSEM(service_level_sem); 245 static LIST_HEAD(service_level_list); 246 247 int register_service_level(struct service_level *slr) 248 { 249 struct service_level *ptr; 250 251 down_write(&service_level_sem); 252 list_for_each_entry(ptr, &service_level_list, list) 253 if (ptr == slr) { 254 up_write(&service_level_sem); 255 return -EEXIST; 256 } 257 list_add_tail(&slr->list, &service_level_list); 258 up_write(&service_level_sem); 259 return 0; 260 } 261 EXPORT_SYMBOL(register_service_level); 262 263 int unregister_service_level(struct service_level *slr) 264 { 265 struct service_level *ptr, *next; 266 int rc = -ENOENT; 267 268 down_write(&service_level_sem); 269 list_for_each_entry_safe(ptr, next, &service_level_list, list) { 270 if (ptr != slr) 271 continue; 272 list_del(&ptr->list); 273 rc = 0; 274 break; 275 } 276 up_write(&service_level_sem); 277 return rc; 278 } 279 EXPORT_SYMBOL(unregister_service_level); 280 281 static void *service_level_start(struct seq_file *m, loff_t *pos) 282 { 283 down_read(&service_level_sem); 284 return seq_list_start(&service_level_list, *pos); 285 } 286 287 static void *service_level_next(struct seq_file *m, void *p, loff_t *pos) 288 { 289 return seq_list_next(p, &service_level_list, pos); 290 } 291 292 static void service_level_stop(struct seq_file *m, void *p) 293 { 294 up_read(&service_level_sem); 295 } 296 297 static int service_level_show(struct seq_file *m, void *p) 298 { 299 struct service_level *slr; 300 301 slr = list_entry(p, struct service_level, list); 302 slr->seq_print(m, slr); 303 return 0; 304 } 305 306 static const struct seq_operations service_level_seq_ops = { 307 .start = service_level_start, 308 .next = service_level_next, 309 .stop = service_level_stop, 310 .show = service_level_show 311 }; 312 313 static int service_level_open(struct inode *inode, struct file *file) 314 { 315 return seq_open(file, &service_level_seq_ops); 316 } 317 318 static const struct file_operations service_level_ops = { 319 .open = service_level_open, 320 .read = seq_read, 321 .llseek = seq_lseek, 322 .release = seq_release 323 }; 324 325 static void service_level_vm_print(struct seq_file *m, 326 struct service_level *slr) 327 { 328 char *query_buffer, *str; 329 330 query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA); 331 if (!query_buffer) 332 return; 333 cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL); 334 str = strchr(query_buffer, '\n'); 335 if (str) 336 *str = 0; 337 seq_printf(m, "VM: %s\n", query_buffer); 338 kfree(query_buffer); 339 } 340 341 static struct service_level service_level_vm = { 342 .seq_print = service_level_vm_print 343 }; 344 345 static __init int create_proc_service_level(void) 346 { 347 proc_create("service_levels", 0, NULL, &service_level_ops); 348 if (MACHINE_IS_VM) 349 register_service_level(&service_level_vm); 350 return 0; 351 } 352 subsys_initcall(create_proc_service_level); 353 354 /* 355 * Bogomips calculation based on cpu capability. 356 */ 357 int get_cpu_capability(unsigned int *capability) 358 { 359 struct sysinfo_1_2_2 *info; 360 int rc; 361 362 info = (void *) get_zeroed_page(GFP_KERNEL); 363 if (!info) 364 return -ENOMEM; 365 rc = stsi(info, 1, 2, 2); 366 if (rc == -ENOSYS) 367 goto out; 368 rc = 0; 369 *capability = info->capability; 370 out: 371 free_page((unsigned long) info); 372 return rc; 373 } 374 375 /* 376 * CPU capability might have changed. Therefore recalculate loops_per_jiffy. 377 */ 378 void s390_adjust_jiffies(void) 379 { 380 struct sysinfo_1_2_2 *info; 381 const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */ 382 FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR); 383 FP_DECL_EX; 384 unsigned int capability; 385 386 info = (void *) get_zeroed_page(GFP_KERNEL); 387 if (!info) 388 return; 389 390 if (stsi(info, 1, 2, 2) != -ENOSYS) { 391 /* 392 * Major sigh. The cpu capability encoding is "special". 393 * If the first 9 bits of info->capability are 0 then it 394 * is a 32 bit unsigned integer in the range 0 .. 2^23. 395 * If the first 9 bits are != 0 then it is a 32 bit float. 396 * In addition a lower value indicates a proportionally 397 * higher cpu capacity. Bogomips are the other way round. 398 * To get to a halfway suitable number we divide 1e7 399 * by the cpu capability number. Yes, that means a floating 400 * point division .. math-emu here we come :-) 401 */ 402 FP_UNPACK_SP(SA, &fmil); 403 if ((info->capability >> 23) == 0) 404 FP_FROM_INT_S(SB, info->capability, 32, int); 405 else 406 FP_UNPACK_SP(SB, &info->capability); 407 FP_DIV_S(SR, SA, SB); 408 FP_TO_INT_S(capability, SR, 32, 0); 409 } else 410 /* 411 * Really old machine without stsi block for basic 412 * cpu information. Report 42.0 bogomips. 413 */ 414 capability = 42; 415 loops_per_jiffy = capability * (500000/HZ); 416 free_page((unsigned long) info); 417 } 418 419 /* 420 * calibrate the delay loop 421 */ 422 void __cpuinit calibrate_delay(void) 423 { 424 s390_adjust_jiffies(); 425 /* Print the good old Bogomips line .. */ 426 printk(KERN_DEBUG "Calibrating delay loop (skipped)... " 427 "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ), 428 (loops_per_jiffy/(5000/HZ)) % 100); 429 } 430