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 #ifdef CONFIG_SCHED_MC 110 store_topology(info); 111 len += sprintf(page + len, "CPU Topology SW: "); 112 for (i = 0; i < TOPOLOGY_NR_MAG; i++) 113 len += sprintf(page + len, " %d", info->mag[i]); 114 len += sprintf(page + len, "\n"); 115 #endif 116 return len; 117 } 118 119 static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len) 120 { 121 struct sysinfo_1_2_2_extension *ext; 122 int i; 123 124 if (stsi(info, 1, 2, 2) == -ENOSYS) 125 return len; 126 ext = (struct sysinfo_1_2_2_extension *) 127 ((unsigned long) info + info->acc_offset); 128 129 len += sprintf(page + len, "CPUs Total: %d\n", 130 info->cpus_total); 131 len += sprintf(page + len, "CPUs Configured: %d\n", 132 info->cpus_configured); 133 len += sprintf(page + len, "CPUs Standby: %d\n", 134 info->cpus_standby); 135 len += sprintf(page + len, "CPUs Reserved: %d\n", 136 info->cpus_reserved); 137 138 if (info->format == 1) { 139 /* 140 * Sigh 2. According to the specification the alternate 141 * capability field is a 32 bit floating point number 142 * if the higher order 8 bits are not zero. Printing 143 * a floating point number in the kernel is a no-no, 144 * always print the number as 32 bit unsigned integer. 145 * The user-space needs to know about the strange 146 * encoding of the alternate cpu capability. 147 */ 148 len += sprintf(page + len, "Capability: %u %u\n", 149 info->capability, ext->alt_capability); 150 for (i = 2; i <= info->cpus_total; i++) 151 len += sprintf(page + len, 152 "Adjustment %02d-way: %u %u\n", 153 i, info->adjustment[i-2], 154 ext->alt_adjustment[i-2]); 155 156 } else { 157 len += sprintf(page + len, "Capability: %u\n", 158 info->capability); 159 for (i = 2; i <= info->cpus_total; i++) 160 len += sprintf(page + len, 161 "Adjustment %02d-way: %u\n", 162 i, info->adjustment[i-2]); 163 } 164 165 if (info->secondary_capability != 0) 166 len += sprintf(page + len, "Secondary Capability: %d\n", 167 info->secondary_capability); 168 return len; 169 } 170 171 static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len) 172 { 173 if (stsi(info, 2, 2, 2) == -ENOSYS) 174 return len; 175 176 EBCASC(info->name, sizeof(info->name)); 177 178 len += sprintf(page + len, "\n"); 179 len += sprintf(page + len, "LPAR Number: %d\n", 180 info->lpar_number); 181 182 len += sprintf(page + len, "LPAR Characteristics: "); 183 if (info->characteristics & LPAR_CHAR_DEDICATED) 184 len += sprintf(page + len, "Dedicated "); 185 if (info->characteristics & LPAR_CHAR_SHARED) 186 len += sprintf(page + len, "Shared "); 187 if (info->characteristics & LPAR_CHAR_LIMITED) 188 len += sprintf(page + len, "Limited "); 189 len += sprintf(page + len, "\n"); 190 191 len += sprintf(page + len, "LPAR Name: %-8.8s\n", 192 info->name); 193 194 len += sprintf(page + len, "LPAR Adjustment: %d\n", 195 info->caf); 196 197 len += sprintf(page + len, "LPAR CPUs Total: %d\n", 198 info->cpus_total); 199 len += sprintf(page + len, "LPAR CPUs Configured: %d\n", 200 info->cpus_configured); 201 len += sprintf(page + len, "LPAR CPUs Standby: %d\n", 202 info->cpus_standby); 203 len += sprintf(page + len, "LPAR CPUs Reserved: %d\n", 204 info->cpus_reserved); 205 len += sprintf(page + len, "LPAR CPUs Dedicated: %d\n", 206 info->cpus_dedicated); 207 len += sprintf(page + len, "LPAR CPUs Shared: %d\n", 208 info->cpus_shared); 209 return len; 210 } 211 212 static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len) 213 { 214 int i; 215 216 if (stsi(info, 3, 2, 2) == -ENOSYS) 217 return len; 218 for (i = 0; i < info->count; i++) { 219 EBCASC(info->vm[i].name, sizeof(info->vm[i].name)); 220 EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi)); 221 len += sprintf(page + len, "\n"); 222 len += sprintf(page + len, "VM%02d Name: %-8.8s\n", 223 i, info->vm[i].name); 224 len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n", 225 i, info->vm[i].cpi); 226 227 len += sprintf(page + len, "VM%02d Adjustment: %d\n", 228 i, info->vm[i].caf); 229 230 len += sprintf(page + len, "VM%02d CPUs Total: %d\n", 231 i, info->vm[i].cpus_total); 232 len += sprintf(page + len, "VM%02d CPUs Configured: %d\n", 233 i, info->vm[i].cpus_configured); 234 len += sprintf(page + len, "VM%02d CPUs Standby: %d\n", 235 i, info->vm[i].cpus_standby); 236 len += sprintf(page + len, "VM%02d CPUs Reserved: %d\n", 237 i, info->vm[i].cpus_reserved); 238 } 239 return len; 240 } 241 242 static int proc_read_sysinfo(char *page, char **start, 243 off_t off, int count, 244 int *eof, void *data) 245 { 246 unsigned long info = get_zeroed_page(GFP_KERNEL); 247 int level, len; 248 249 if (!info) 250 return 0; 251 252 len = 0; 253 level = stsi_0(); 254 if (level >= 1) 255 len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len); 256 257 if (level >= 1) 258 len = stsi_15_1_x((struct sysinfo_15_1_x *) info, page, len); 259 260 if (level >= 1) 261 len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len); 262 263 if (level >= 2) 264 len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len); 265 266 if (level >= 3) 267 len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len); 268 269 free_page(info); 270 return len; 271 } 272 273 static __init int create_proc_sysinfo(void) 274 { 275 create_proc_read_entry("sysinfo", 0444, NULL, 276 proc_read_sysinfo, NULL); 277 return 0; 278 } 279 device_initcall(create_proc_sysinfo); 280 281 /* 282 * Service levels interface. 283 */ 284 285 static DECLARE_RWSEM(service_level_sem); 286 static LIST_HEAD(service_level_list); 287 288 int register_service_level(struct service_level *slr) 289 { 290 struct service_level *ptr; 291 292 down_write(&service_level_sem); 293 list_for_each_entry(ptr, &service_level_list, list) 294 if (ptr == slr) { 295 up_write(&service_level_sem); 296 return -EEXIST; 297 } 298 list_add_tail(&slr->list, &service_level_list); 299 up_write(&service_level_sem); 300 return 0; 301 } 302 EXPORT_SYMBOL(register_service_level); 303 304 int unregister_service_level(struct service_level *slr) 305 { 306 struct service_level *ptr, *next; 307 int rc = -ENOENT; 308 309 down_write(&service_level_sem); 310 list_for_each_entry_safe(ptr, next, &service_level_list, list) { 311 if (ptr != slr) 312 continue; 313 list_del(&ptr->list); 314 rc = 0; 315 break; 316 } 317 up_write(&service_level_sem); 318 return rc; 319 } 320 EXPORT_SYMBOL(unregister_service_level); 321 322 static void *service_level_start(struct seq_file *m, loff_t *pos) 323 { 324 down_read(&service_level_sem); 325 return seq_list_start(&service_level_list, *pos); 326 } 327 328 static void *service_level_next(struct seq_file *m, void *p, loff_t *pos) 329 { 330 return seq_list_next(p, &service_level_list, pos); 331 } 332 333 static void service_level_stop(struct seq_file *m, void *p) 334 { 335 up_read(&service_level_sem); 336 } 337 338 static int service_level_show(struct seq_file *m, void *p) 339 { 340 struct service_level *slr; 341 342 slr = list_entry(p, struct service_level, list); 343 slr->seq_print(m, slr); 344 return 0; 345 } 346 347 static const struct seq_operations service_level_seq_ops = { 348 .start = service_level_start, 349 .next = service_level_next, 350 .stop = service_level_stop, 351 .show = service_level_show 352 }; 353 354 static int service_level_open(struct inode *inode, struct file *file) 355 { 356 return seq_open(file, &service_level_seq_ops); 357 } 358 359 static const struct file_operations service_level_ops = { 360 .open = service_level_open, 361 .read = seq_read, 362 .llseek = seq_lseek, 363 .release = seq_release 364 }; 365 366 static void service_level_vm_print(struct seq_file *m, 367 struct service_level *slr) 368 { 369 char *query_buffer, *str; 370 371 query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA); 372 if (!query_buffer) 373 return; 374 cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL); 375 str = strchr(query_buffer, '\n'); 376 if (str) 377 *str = 0; 378 seq_printf(m, "VM: %s\n", query_buffer); 379 kfree(query_buffer); 380 } 381 382 static struct service_level service_level_vm = { 383 .seq_print = service_level_vm_print 384 }; 385 386 static __init int create_proc_service_level(void) 387 { 388 proc_create("service_levels", 0, NULL, &service_level_ops); 389 if (MACHINE_IS_VM) 390 register_service_level(&service_level_vm); 391 return 0; 392 } 393 subsys_initcall(create_proc_service_level); 394 395 /* 396 * Bogomips calculation based on cpu capability. 397 */ 398 int get_cpu_capability(unsigned int *capability) 399 { 400 struct sysinfo_1_2_2 *info; 401 int rc; 402 403 info = (void *) get_zeroed_page(GFP_KERNEL); 404 if (!info) 405 return -ENOMEM; 406 rc = stsi(info, 1, 2, 2); 407 if (rc == -ENOSYS) 408 goto out; 409 rc = 0; 410 *capability = info->capability; 411 out: 412 free_page((unsigned long) info); 413 return rc; 414 } 415 416 /* 417 * CPU capability might have changed. Therefore recalculate loops_per_jiffy. 418 */ 419 void s390_adjust_jiffies(void) 420 { 421 struct sysinfo_1_2_2 *info; 422 const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */ 423 FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR); 424 FP_DECL_EX; 425 unsigned int capability; 426 427 info = (void *) get_zeroed_page(GFP_KERNEL); 428 if (!info) 429 return; 430 431 if (stsi(info, 1, 2, 2) != -ENOSYS) { 432 /* 433 * Major sigh. The cpu capability encoding is "special". 434 * If the first 9 bits of info->capability are 0 then it 435 * is a 32 bit unsigned integer in the range 0 .. 2^23. 436 * If the first 9 bits are != 0 then it is a 32 bit float. 437 * In addition a lower value indicates a proportionally 438 * higher cpu capacity. Bogomips are the other way round. 439 * To get to a halfway suitable number we divide 1e7 440 * by the cpu capability number. Yes, that means a floating 441 * point division .. math-emu here we come :-) 442 */ 443 FP_UNPACK_SP(SA, &fmil); 444 if ((info->capability >> 23) == 0) 445 FP_FROM_INT_S(SB, info->capability, 32, int); 446 else 447 FP_UNPACK_SP(SB, &info->capability); 448 FP_DIV_S(SR, SA, SB); 449 FP_TO_INT_S(capability, SR, 32, 0); 450 } else 451 /* 452 * Really old machine without stsi block for basic 453 * cpu information. Report 42.0 bogomips. 454 */ 455 capability = 42; 456 loops_per_jiffy = capability * (500000/HZ); 457 free_page((unsigned long) info); 458 } 459 460 /* 461 * calibrate the delay loop 462 */ 463 void __cpuinit calibrate_delay(void) 464 { 465 s390_adjust_jiffies(); 466 /* Print the good old Bogomips line .. */ 467 printk(KERN_DEBUG "Calibrating delay loop (skipped)... " 468 "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ), 469 (loops_per_jiffy/(5000/HZ)) % 100); 470 } 471