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 #include <asm/topology.h> 19 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 25 static inline int stsi_0(void) 26 { 27 int rc = stsi(NULL, 0, 0, 0); 28 return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28); 29 } 30 31 static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len) 32 { 33 if (stsi(info, 1, 1, 1) == -ENOSYS) 34 return len; 35 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)); 42 EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap)); 43 EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap)); 44 len += sprintf(page + len, "Manufacturer: %-16.16s\n", 45 info->manufacturer); 46 len += sprintf(page + len, "Type: %-4.4s\n", 47 info->type); 48 if (info->model[0] != '\0') 49 /* 50 * Sigh: the model field has been renamed with System z9 51 * to model_capacity and a new model field has been added 52 * after the plant field. To avoid confusing older programs 53 * the "Model:" prints "model_capacity model" or just 54 * "model_capacity" if the model string is empty . 55 */ 56 len += sprintf(page + len, 57 "Model: %-16.16s %-16.16s\n", 58 info->model_capacity, info->model); 59 else 60 len += sprintf(page + len, "Model: %-16.16s\n", 61 info->model_capacity); 62 len += sprintf(page + len, "Sequence Code: %-16.16s\n", 63 info->sequence); 64 len += sprintf(page + len, "Plant: %-4.4s\n", 65 info->plant); 66 len += sprintf(page + len, "Model Capacity: %-16.16s %08u\n", 67 info->model_capacity, *(u32 *) info->model_cap_rating); 68 if (info->model_perm_cap[0] != '\0') 69 len += sprintf(page + len, 70 "Model Perm. Capacity: %-16.16s %08u\n", 71 info->model_perm_cap, 72 *(u32 *) info->model_perm_cap_rating); 73 if (info->model_temp_cap[0] != '\0') 74 len += sprintf(page + len, 75 "Model Temp. Capacity: %-16.16s %08u\n", 76 info->model_temp_cap, 77 *(u32 *) info->model_temp_cap_rating); 78 if (info->cai) { 79 len += sprintf(page + len, 80 "Capacity Adj. Ind.: %d\n", 81 info->cai); 82 len += sprintf(page + len, "Capacity Ch. Reason: %d\n", 83 info->ccr); 84 } 85 return len; 86 } 87 88 static int stsi_15_1_x(struct sysinfo_15_1_x *info, char *page, int len) 89 { 90 static int max_mnest; 91 int i, rc; 92 93 len += sprintf(page + len, "\n"); 94 if (!MACHINE_HAS_TOPOLOGY) 95 return len; 96 if (max_mnest) { 97 stsi(info, 15, 1, max_mnest); 98 } else { 99 for (max_mnest = 6; max_mnest > 1; max_mnest--) { 100 rc = stsi(info, 15, 1, max_mnest); 101 if (rc != -ENOSYS) 102 break; 103 } 104 } 105 len += sprintf(page + len, "CPU Topology HW: "); 106 for (i = 0; i < TOPOLOGY_NR_MAG; i++) 107 len += sprintf(page + len, " %d", info->mag[i]); 108 len += sprintf(page + len, "\n"); 109 store_topology(info); 110 len += sprintf(page + len, "CPU Topology SW: "); 111 for (i = 0; i < TOPOLOGY_NR_MAG; i++) 112 len += sprintf(page + len, " %d", info->mag[i]); 113 len += sprintf(page + len, "\n"); 114 return len; 115 } 116 117 static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len) 118 { 119 struct sysinfo_1_2_2_extension *ext; 120 int i; 121 122 if (stsi(info, 1, 2, 2) == -ENOSYS) 123 return len; 124 ext = (struct sysinfo_1_2_2_extension *) 125 ((unsigned long) info + info->acc_offset); 126 127 len += sprintf(page + len, "CPUs Total: %d\n", 128 info->cpus_total); 129 len += sprintf(page + len, "CPUs Configured: %d\n", 130 info->cpus_configured); 131 len += sprintf(page + len, "CPUs Standby: %d\n", 132 info->cpus_standby); 133 len += sprintf(page + len, "CPUs Reserved: %d\n", 134 info->cpus_reserved); 135 136 if (info->format == 1) { 137 /* 138 * Sigh 2. According to the specification the alternate 139 * capability field is a 32 bit floating point number 140 * if the higher order 8 bits are not zero. Printing 141 * a floating point number in the kernel is a no-no, 142 * always print the number as 32 bit unsigned integer. 143 * The user-space needs to know about the strange 144 * encoding of the alternate cpu capability. 145 */ 146 len += sprintf(page + len, "Capability: %u %u\n", 147 info->capability, ext->alt_capability); 148 for (i = 2; i <= info->cpus_total; i++) 149 len += sprintf(page + len, 150 "Adjustment %02d-way: %u %u\n", 151 i, info->adjustment[i-2], 152 ext->alt_adjustment[i-2]); 153 154 } else { 155 len += sprintf(page + len, "Capability: %u\n", 156 info->capability); 157 for (i = 2; i <= info->cpus_total; i++) 158 len += sprintf(page + len, 159 "Adjustment %02d-way: %u\n", 160 i, info->adjustment[i-2]); 161 } 162 163 if (info->secondary_capability != 0) 164 len += sprintf(page + len, "Secondary Capability: %d\n", 165 info->secondary_capability); 166 return len; 167 } 168 169 static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len) 170 { 171 if (stsi(info, 2, 2, 2) == -ENOSYS) 172 return len; 173 174 EBCASC(info->name, sizeof(info->name)); 175 176 len += sprintf(page + len, "\n"); 177 len += sprintf(page + len, "LPAR Number: %d\n", 178 info->lpar_number); 179 180 len += sprintf(page + len, "LPAR Characteristics: "); 181 if (info->characteristics & LPAR_CHAR_DEDICATED) 182 len += sprintf(page + len, "Dedicated "); 183 if (info->characteristics & LPAR_CHAR_SHARED) 184 len += sprintf(page + len, "Shared "); 185 if (info->characteristics & LPAR_CHAR_LIMITED) 186 len += sprintf(page + len, "Limited "); 187 len += sprintf(page + len, "\n"); 188 189 len += sprintf(page + len, "LPAR Name: %-8.8s\n", 190 info->name); 191 192 len += sprintf(page + len, "LPAR Adjustment: %d\n", 193 info->caf); 194 195 len += sprintf(page + len, "LPAR CPUs Total: %d\n", 196 info->cpus_total); 197 len += sprintf(page + len, "LPAR CPUs Configured: %d\n", 198 info->cpus_configured); 199 len += sprintf(page + len, "LPAR CPUs Standby: %d\n", 200 info->cpus_standby); 201 len += sprintf(page + len, "LPAR CPUs Reserved: %d\n", 202 info->cpus_reserved); 203 len += sprintf(page + len, "LPAR CPUs Dedicated: %d\n", 204 info->cpus_dedicated); 205 len += sprintf(page + len, "LPAR CPUs Shared: %d\n", 206 info->cpus_shared); 207 return len; 208 } 209 210 static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len) 211 { 212 int i; 213 214 if (stsi(info, 3, 2, 2) == -ENOSYS) 215 return len; 216 for (i = 0; i < info->count; i++) { 217 EBCASC(info->vm[i].name, sizeof(info->vm[i].name)); 218 EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi)); 219 len += sprintf(page + len, "\n"); 220 len += sprintf(page + len, "VM%02d Name: %-8.8s\n", 221 i, info->vm[i].name); 222 len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n", 223 i, info->vm[i].cpi); 224 225 len += sprintf(page + len, "VM%02d Adjustment: %d\n", 226 i, info->vm[i].caf); 227 228 len += sprintf(page + len, "VM%02d CPUs Total: %d\n", 229 i, info->vm[i].cpus_total); 230 len += sprintf(page + len, "VM%02d CPUs Configured: %d\n", 231 i, info->vm[i].cpus_configured); 232 len += sprintf(page + len, "VM%02d CPUs Standby: %d\n", 233 i, info->vm[i].cpus_standby); 234 len += sprintf(page + len, "VM%02d CPUs Reserved: %d\n", 235 i, info->vm[i].cpus_reserved); 236 } 237 return len; 238 } 239 240 static int proc_read_sysinfo(char *page, char **start, 241 off_t off, int count, 242 int *eof, void *data) 243 { 244 unsigned long info = get_zeroed_page(GFP_KERNEL); 245 int level, len; 246 247 if (!info) 248 return 0; 249 250 len = 0; 251 level = stsi_0(); 252 if (level >= 1) 253 len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len); 254 255 if (level >= 1) 256 len = stsi_15_1_x((struct sysinfo_15_1_x *) info, page, len); 257 258 if (level >= 1) 259 len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len); 260 261 if (level >= 2) 262 len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len); 263 264 if (level >= 3) 265 len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len); 266 267 free_page(info); 268 return len; 269 } 270 271 static __init int create_proc_sysinfo(void) 272 { 273 create_proc_read_entry("sysinfo", 0444, NULL, 274 proc_read_sysinfo, NULL); 275 return 0; 276 } 277 device_initcall(create_proc_sysinfo); 278 279 /* 280 * Service levels interface. 281 */ 282 283 static DECLARE_RWSEM(service_level_sem); 284 static LIST_HEAD(service_level_list); 285 286 int register_service_level(struct service_level *slr) 287 { 288 struct service_level *ptr; 289 290 down_write(&service_level_sem); 291 list_for_each_entry(ptr, &service_level_list, list) 292 if (ptr == slr) { 293 up_write(&service_level_sem); 294 return -EEXIST; 295 } 296 list_add_tail(&slr->list, &service_level_list); 297 up_write(&service_level_sem); 298 return 0; 299 } 300 EXPORT_SYMBOL(register_service_level); 301 302 int unregister_service_level(struct service_level *slr) 303 { 304 struct service_level *ptr, *next; 305 int rc = -ENOENT; 306 307 down_write(&service_level_sem); 308 list_for_each_entry_safe(ptr, next, &service_level_list, list) { 309 if (ptr != slr) 310 continue; 311 list_del(&ptr->list); 312 rc = 0; 313 break; 314 } 315 up_write(&service_level_sem); 316 return rc; 317 } 318 EXPORT_SYMBOL(unregister_service_level); 319 320 static void *service_level_start(struct seq_file *m, loff_t *pos) 321 { 322 down_read(&service_level_sem); 323 return seq_list_start(&service_level_list, *pos); 324 } 325 326 static void *service_level_next(struct seq_file *m, void *p, loff_t *pos) 327 { 328 return seq_list_next(p, &service_level_list, pos); 329 } 330 331 static void service_level_stop(struct seq_file *m, void *p) 332 { 333 up_read(&service_level_sem); 334 } 335 336 static int service_level_show(struct seq_file *m, void *p) 337 { 338 struct service_level *slr; 339 340 slr = list_entry(p, struct service_level, list); 341 slr->seq_print(m, slr); 342 return 0; 343 } 344 345 static const struct seq_operations service_level_seq_ops = { 346 .start = service_level_start, 347 .next = service_level_next, 348 .stop = service_level_stop, 349 .show = service_level_show 350 }; 351 352 static int service_level_open(struct inode *inode, struct file *file) 353 { 354 return seq_open(file, &service_level_seq_ops); 355 } 356 357 static const struct file_operations service_level_ops = { 358 .open = service_level_open, 359 .read = seq_read, 360 .llseek = seq_lseek, 361 .release = seq_release 362 }; 363 364 static void service_level_vm_print(struct seq_file *m, 365 struct service_level *slr) 366 { 367 char *query_buffer, *str; 368 369 query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA); 370 if (!query_buffer) 371 return; 372 cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL); 373 str = strchr(query_buffer, '\n'); 374 if (str) 375 *str = 0; 376 seq_printf(m, "VM: %s\n", query_buffer); 377 kfree(query_buffer); 378 } 379 380 static struct service_level service_level_vm = { 381 .seq_print = service_level_vm_print 382 }; 383 384 static __init int create_proc_service_level(void) 385 { 386 proc_create("service_levels", 0, NULL, &service_level_ops); 387 if (MACHINE_IS_VM) 388 register_service_level(&service_level_vm); 389 return 0; 390 } 391 subsys_initcall(create_proc_service_level); 392 393 /* 394 * Bogomips calculation based on cpu capability. 395 */ 396 int get_cpu_capability(unsigned int *capability) 397 { 398 struct sysinfo_1_2_2 *info; 399 int rc; 400 401 info = (void *) get_zeroed_page(GFP_KERNEL); 402 if (!info) 403 return -ENOMEM; 404 rc = stsi(info, 1, 2, 2); 405 if (rc == -ENOSYS) 406 goto out; 407 rc = 0; 408 *capability = info->capability; 409 out: 410 free_page((unsigned long) info); 411 return rc; 412 } 413 414 /* 415 * CPU capability might have changed. Therefore recalculate loops_per_jiffy. 416 */ 417 void s390_adjust_jiffies(void) 418 { 419 struct sysinfo_1_2_2 *info; 420 const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */ 421 FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR); 422 FP_DECL_EX; 423 unsigned int capability; 424 425 info = (void *) get_zeroed_page(GFP_KERNEL); 426 if (!info) 427 return; 428 429 if (stsi(info, 1, 2, 2) != -ENOSYS) { 430 /* 431 * Major sigh. The cpu capability encoding is "special". 432 * If the first 9 bits of info->capability are 0 then it 433 * is a 32 bit unsigned integer in the range 0 .. 2^23. 434 * If the first 9 bits are != 0 then it is a 32 bit float. 435 * In addition a lower value indicates a proportionally 436 * higher cpu capacity. Bogomips are the other way round. 437 * To get to a halfway suitable number we divide 1e7 438 * by the cpu capability number. Yes, that means a floating 439 * point division .. math-emu here we come :-) 440 */ 441 FP_UNPACK_SP(SA, &fmil); 442 if ((info->capability >> 23) == 0) 443 FP_FROM_INT_S(SB, info->capability, 32, int); 444 else 445 FP_UNPACK_SP(SB, &info->capability); 446 FP_DIV_S(SR, SA, SB); 447 FP_TO_INT_S(capability, SR, 32, 0); 448 } else 449 /* 450 * Really old machine without stsi block for basic 451 * cpu information. Report 42.0 bogomips. 452 */ 453 capability = 42; 454 loops_per_jiffy = capability * (500000/HZ); 455 free_page((unsigned long) info); 456 } 457 458 /* 459 * calibrate the delay loop 460 */ 461 void __cpuinit calibrate_delay(void) 462 { 463 s390_adjust_jiffies(); 464 /* Print the good old Bogomips line .. */ 465 printk(KERN_DEBUG "Calibrating delay loop (skipped)... " 466 "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ), 467 (loops_per_jiffy/(5000/HZ)) % 100); 468 } 469