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/export.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 #include <asm/fpu/api.h> 20 21 int topology_max_mnest; 22 23 static inline int __stsi(void *sysinfo, int fc, int sel1, int sel2, int *lvl) 24 { 25 register int r0 asm("0") = (fc << 28) | sel1; 26 register int r1 asm("1") = sel2; 27 int rc = 0; 28 29 asm volatile( 30 " stsi 0(%3)\n" 31 "0: jz 2f\n" 32 "1: lhi %1,%4\n" 33 "2:\n" 34 EX_TABLE(0b, 1b) 35 : "+d" (r0), "+d" (rc) 36 : "d" (r1), "a" (sysinfo), "K" (-EOPNOTSUPP) 37 : "cc", "memory"); 38 *lvl = ((unsigned int) r0) >> 28; 39 return rc; 40 } 41 42 /* 43 * stsi - store system information 44 * 45 * Returns the current configuration level if function code 0 was specified. 46 * Otherwise returns 0 on success or a negative value on error. 47 */ 48 int stsi(void *sysinfo, int fc, int sel1, int sel2) 49 { 50 int lvl, rc; 51 52 rc = __stsi(sysinfo, fc, sel1, sel2, &lvl); 53 if (rc) 54 return rc; 55 return fc ? 0 : lvl; 56 } 57 EXPORT_SYMBOL(stsi); 58 59 static bool convert_ext_name(unsigned char encoding, char *name, size_t len) 60 { 61 switch (encoding) { 62 case 1: /* EBCDIC */ 63 EBCASC(name, len); 64 break; 65 case 2: /* UTF-8 */ 66 break; 67 default: 68 return false; 69 } 70 return true; 71 } 72 73 static void stsi_1_1_1(struct seq_file *m, struct sysinfo_1_1_1 *info) 74 { 75 int i; 76 77 if (stsi(info, 1, 1, 1)) 78 return; 79 EBCASC(info->manufacturer, sizeof(info->manufacturer)); 80 EBCASC(info->type, sizeof(info->type)); 81 EBCASC(info->model, sizeof(info->model)); 82 EBCASC(info->sequence, sizeof(info->sequence)); 83 EBCASC(info->plant, sizeof(info->plant)); 84 EBCASC(info->model_capacity, sizeof(info->model_capacity)); 85 EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap)); 86 EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap)); 87 seq_printf(m, "Manufacturer: %-16.16s\n", info->manufacturer); 88 seq_printf(m, "Type: %-4.4s\n", info->type); 89 /* 90 * Sigh: the model field has been renamed with System z9 91 * to model_capacity and a new model field has been added 92 * after the plant field. To avoid confusing older programs 93 * the "Model:" prints "model_capacity model" or just 94 * "model_capacity" if the model string is empty . 95 */ 96 seq_printf(m, "Model: %-16.16s", info->model_capacity); 97 if (info->model[0] != '\0') 98 seq_printf(m, " %-16.16s", info->model); 99 seq_putc(m, '\n'); 100 seq_printf(m, "Sequence Code: %-16.16s\n", info->sequence); 101 seq_printf(m, "Plant: %-4.4s\n", info->plant); 102 seq_printf(m, "Model Capacity: %-16.16s %08u\n", 103 info->model_capacity, info->model_cap_rating); 104 if (info->model_perm_cap_rating) 105 seq_printf(m, "Model Perm. Capacity: %-16.16s %08u\n", 106 info->model_perm_cap, 107 info->model_perm_cap_rating); 108 if (info->model_temp_cap_rating) 109 seq_printf(m, "Model Temp. Capacity: %-16.16s %08u\n", 110 info->model_temp_cap, 111 info->model_temp_cap_rating); 112 if (info->ncr) 113 seq_printf(m, "Nominal Cap. Rating: %08u\n", info->ncr); 114 if (info->npr) 115 seq_printf(m, "Nominal Perm. Rating: %08u\n", info->npr); 116 if (info->ntr) 117 seq_printf(m, "Nominal Temp. Rating: %08u\n", info->ntr); 118 if (info->cai) { 119 seq_printf(m, "Capacity Adj. Ind.: %d\n", info->cai); 120 seq_printf(m, "Capacity Ch. Reason: %d\n", info->ccr); 121 seq_printf(m, "Capacity Transient: %d\n", info->t); 122 } 123 if (info->p) { 124 for (i = 1; i <= ARRAY_SIZE(info->typepct); i++) { 125 seq_printf(m, "Type %d Percentage: %d\n", 126 i, info->typepct[i - 1]); 127 } 128 } 129 } 130 131 static void stsi_15_1_x(struct seq_file *m, struct sysinfo_15_1_x *info) 132 { 133 int i; 134 135 seq_putc(m, '\n'); 136 if (!MACHINE_HAS_TOPOLOGY) 137 return; 138 if (stsi(info, 15, 1, topology_max_mnest)) 139 return; 140 seq_printf(m, "CPU Topology HW: "); 141 for (i = 0; i < TOPOLOGY_NR_MAG; i++) 142 seq_printf(m, " %d", info->mag[i]); 143 seq_putc(m, '\n'); 144 #ifdef CONFIG_SCHED_TOPOLOGY 145 store_topology(info); 146 seq_printf(m, "CPU Topology SW: "); 147 for (i = 0; i < TOPOLOGY_NR_MAG; i++) 148 seq_printf(m, " %d", info->mag[i]); 149 seq_putc(m, '\n'); 150 #endif 151 } 152 153 static void stsi_1_2_2(struct seq_file *m, struct sysinfo_1_2_2 *info) 154 { 155 struct sysinfo_1_2_2_extension *ext; 156 int i; 157 158 if (stsi(info, 1, 2, 2)) 159 return; 160 ext = (struct sysinfo_1_2_2_extension *) 161 ((unsigned long) info + info->acc_offset); 162 seq_printf(m, "CPUs Total: %d\n", info->cpus_total); 163 seq_printf(m, "CPUs Configured: %d\n", info->cpus_configured); 164 seq_printf(m, "CPUs Standby: %d\n", info->cpus_standby); 165 seq_printf(m, "CPUs Reserved: %d\n", info->cpus_reserved); 166 if (info->mt_installed) { 167 seq_printf(m, "CPUs G-MTID: %d\n", info->mt_gtid); 168 seq_printf(m, "CPUs S-MTID: %d\n", info->mt_stid); 169 } 170 /* 171 * Sigh 2. According to the specification the alternate 172 * capability field is a 32 bit floating point number 173 * if the higher order 8 bits are not zero. Printing 174 * a floating point number in the kernel is a no-no, 175 * always print the number as 32 bit unsigned integer. 176 * The user-space needs to know about the strange 177 * encoding of the alternate cpu capability. 178 */ 179 seq_printf(m, "Capability: %u", info->capability); 180 if (info->format == 1) 181 seq_printf(m, " %u", ext->alt_capability); 182 seq_putc(m, '\n'); 183 if (info->nominal_cap) 184 seq_printf(m, "Nominal Capability: %d\n", info->nominal_cap); 185 if (info->secondary_cap) 186 seq_printf(m, "Secondary Capability: %d\n", info->secondary_cap); 187 for (i = 2; i <= info->cpus_total; i++) { 188 seq_printf(m, "Adjustment %02d-way: %u", 189 i, info->adjustment[i-2]); 190 if (info->format == 1) 191 seq_printf(m, " %u", ext->alt_adjustment[i-2]); 192 seq_putc(m, '\n'); 193 } 194 } 195 196 static void stsi_2_2_2(struct seq_file *m, struct sysinfo_2_2_2 *info) 197 { 198 if (stsi(info, 2, 2, 2)) 199 return; 200 EBCASC(info->name, sizeof(info->name)); 201 seq_putc(m, '\n'); 202 seq_printf(m, "LPAR Number: %d\n", info->lpar_number); 203 seq_printf(m, "LPAR Characteristics: "); 204 if (info->characteristics & LPAR_CHAR_DEDICATED) 205 seq_printf(m, "Dedicated "); 206 if (info->characteristics & LPAR_CHAR_SHARED) 207 seq_printf(m, "Shared "); 208 if (info->characteristics & LPAR_CHAR_LIMITED) 209 seq_printf(m, "Limited "); 210 seq_putc(m, '\n'); 211 seq_printf(m, "LPAR Name: %-8.8s\n", info->name); 212 seq_printf(m, "LPAR Adjustment: %d\n", info->caf); 213 seq_printf(m, "LPAR CPUs Total: %d\n", info->cpus_total); 214 seq_printf(m, "LPAR CPUs Configured: %d\n", info->cpus_configured); 215 seq_printf(m, "LPAR CPUs Standby: %d\n", info->cpus_standby); 216 seq_printf(m, "LPAR CPUs Reserved: %d\n", info->cpus_reserved); 217 seq_printf(m, "LPAR CPUs Dedicated: %d\n", info->cpus_dedicated); 218 seq_printf(m, "LPAR CPUs Shared: %d\n", info->cpus_shared); 219 if (info->mt_installed) { 220 seq_printf(m, "LPAR CPUs G-MTID: %d\n", info->mt_gtid); 221 seq_printf(m, "LPAR CPUs S-MTID: %d\n", info->mt_stid); 222 seq_printf(m, "LPAR CPUs PS-MTID: %d\n", info->mt_psmtid); 223 } 224 if (convert_ext_name(info->vsne, info->ext_name, sizeof(info->ext_name))) { 225 seq_printf(m, "LPAR Extended Name: %-.256s\n", info->ext_name); 226 seq_printf(m, "LPAR UUID: %pUb\n", &info->uuid); 227 } 228 } 229 230 static void print_ext_name(struct seq_file *m, int lvl, 231 struct sysinfo_3_2_2 *info) 232 { 233 size_t len = sizeof(info->ext_names[lvl]); 234 235 if (!convert_ext_name(info->vm[lvl].evmne, info->ext_names[lvl], len)) 236 return; 237 seq_printf(m, "VM%02d Extended Name: %-.256s\n", lvl, 238 info->ext_names[lvl]); 239 } 240 241 static void print_uuid(struct seq_file *m, int i, struct sysinfo_3_2_2 *info) 242 { 243 if (!memcmp(&info->vm[i].uuid, &NULL_UUID_BE, sizeof(uuid_be))) 244 return; 245 seq_printf(m, "VM%02d UUID: %pUb\n", i, &info->vm[i].uuid); 246 } 247 248 static void stsi_3_2_2(struct seq_file *m, struct sysinfo_3_2_2 *info) 249 { 250 int i; 251 252 if (stsi(info, 3, 2, 2)) 253 return; 254 for (i = 0; i < info->count; i++) { 255 EBCASC(info->vm[i].name, sizeof(info->vm[i].name)); 256 EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi)); 257 seq_putc(m, '\n'); 258 seq_printf(m, "VM%02d Name: %-8.8s\n", i, info->vm[i].name); 259 seq_printf(m, "VM%02d Control Program: %-16.16s\n", i, info->vm[i].cpi); 260 seq_printf(m, "VM%02d Adjustment: %d\n", i, info->vm[i].caf); 261 seq_printf(m, "VM%02d CPUs Total: %d\n", i, info->vm[i].cpus_total); 262 seq_printf(m, "VM%02d CPUs Configured: %d\n", i, info->vm[i].cpus_configured); 263 seq_printf(m, "VM%02d CPUs Standby: %d\n", i, info->vm[i].cpus_standby); 264 seq_printf(m, "VM%02d CPUs Reserved: %d\n", i, info->vm[i].cpus_reserved); 265 print_ext_name(m, i, info); 266 print_uuid(m, i, info); 267 } 268 } 269 270 static int sysinfo_show(struct seq_file *m, void *v) 271 { 272 void *info = (void *)get_zeroed_page(GFP_KERNEL); 273 int level; 274 275 if (!info) 276 return 0; 277 level = stsi(NULL, 0, 0, 0); 278 if (level >= 1) 279 stsi_1_1_1(m, info); 280 if (level >= 1) 281 stsi_15_1_x(m, info); 282 if (level >= 1) 283 stsi_1_2_2(m, info); 284 if (level >= 2) 285 stsi_2_2_2(m, info); 286 if (level >= 3) 287 stsi_3_2_2(m, info); 288 free_page((unsigned long)info); 289 return 0; 290 } 291 292 static int sysinfo_open(struct inode *inode, struct file *file) 293 { 294 return single_open(file, sysinfo_show, NULL); 295 } 296 297 static const struct file_operations sysinfo_fops = { 298 .open = sysinfo_open, 299 .read = seq_read, 300 .llseek = seq_lseek, 301 .release = single_release, 302 }; 303 304 static int __init sysinfo_create_proc(void) 305 { 306 proc_create("sysinfo", 0444, NULL, &sysinfo_fops); 307 return 0; 308 } 309 device_initcall(sysinfo_create_proc); 310 311 /* 312 * Service levels interface. 313 */ 314 315 static DECLARE_RWSEM(service_level_sem); 316 static LIST_HEAD(service_level_list); 317 318 int register_service_level(struct service_level *slr) 319 { 320 struct service_level *ptr; 321 322 down_write(&service_level_sem); 323 list_for_each_entry(ptr, &service_level_list, list) 324 if (ptr == slr) { 325 up_write(&service_level_sem); 326 return -EEXIST; 327 } 328 list_add_tail(&slr->list, &service_level_list); 329 up_write(&service_level_sem); 330 return 0; 331 } 332 EXPORT_SYMBOL(register_service_level); 333 334 int unregister_service_level(struct service_level *slr) 335 { 336 struct service_level *ptr, *next; 337 int rc = -ENOENT; 338 339 down_write(&service_level_sem); 340 list_for_each_entry_safe(ptr, next, &service_level_list, list) { 341 if (ptr != slr) 342 continue; 343 list_del(&ptr->list); 344 rc = 0; 345 break; 346 } 347 up_write(&service_level_sem); 348 return rc; 349 } 350 EXPORT_SYMBOL(unregister_service_level); 351 352 static void *service_level_start(struct seq_file *m, loff_t *pos) 353 { 354 down_read(&service_level_sem); 355 return seq_list_start(&service_level_list, *pos); 356 } 357 358 static void *service_level_next(struct seq_file *m, void *p, loff_t *pos) 359 { 360 return seq_list_next(p, &service_level_list, pos); 361 } 362 363 static void service_level_stop(struct seq_file *m, void *p) 364 { 365 up_read(&service_level_sem); 366 } 367 368 static int service_level_show(struct seq_file *m, void *p) 369 { 370 struct service_level *slr; 371 372 slr = list_entry(p, struct service_level, list); 373 slr->seq_print(m, slr); 374 return 0; 375 } 376 377 static const struct seq_operations service_level_seq_ops = { 378 .start = service_level_start, 379 .next = service_level_next, 380 .stop = service_level_stop, 381 .show = service_level_show 382 }; 383 384 static int service_level_open(struct inode *inode, struct file *file) 385 { 386 return seq_open(file, &service_level_seq_ops); 387 } 388 389 static const struct file_operations service_level_ops = { 390 .open = service_level_open, 391 .read = seq_read, 392 .llseek = seq_lseek, 393 .release = seq_release 394 }; 395 396 static void service_level_vm_print(struct seq_file *m, 397 struct service_level *slr) 398 { 399 char *query_buffer, *str; 400 401 query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA); 402 if (!query_buffer) 403 return; 404 cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL); 405 str = strchr(query_buffer, '\n'); 406 if (str) 407 *str = 0; 408 seq_printf(m, "VM: %s\n", query_buffer); 409 kfree(query_buffer); 410 } 411 412 static struct service_level service_level_vm = { 413 .seq_print = service_level_vm_print 414 }; 415 416 static __init int create_proc_service_level(void) 417 { 418 proc_create("service_levels", 0, NULL, &service_level_ops); 419 if (MACHINE_IS_VM) 420 register_service_level(&service_level_vm); 421 return 0; 422 } 423 subsys_initcall(create_proc_service_level); 424 425 /* 426 * CPU capability might have changed. Therefore recalculate loops_per_jiffy. 427 */ 428 void s390_adjust_jiffies(void) 429 { 430 struct sysinfo_1_2_2 *info; 431 unsigned long capability; 432 struct kernel_fpu fpu; 433 434 info = (void *) get_zeroed_page(GFP_KERNEL); 435 if (!info) 436 return; 437 438 if (stsi(info, 1, 2, 2) == 0) { 439 /* 440 * Major sigh. The cpu capability encoding is "special". 441 * If the first 9 bits of info->capability are 0 then it 442 * is a 32 bit unsigned integer in the range 0 .. 2^23. 443 * If the first 9 bits are != 0 then it is a 32 bit float. 444 * In addition a lower value indicates a proportionally 445 * higher cpu capacity. Bogomips are the other way round. 446 * To get to a halfway suitable number we divide 1e7 447 * by the cpu capability number. Yes, that means a floating 448 * point division .. 449 */ 450 kernel_fpu_begin(&fpu, KERNEL_FPR); 451 asm volatile( 452 " sfpc %3\n" 453 " l %0,%1\n" 454 " tmlh %0,0xff80\n" 455 " jnz 0f\n" 456 " cefbr %%f2,%0\n" 457 " j 1f\n" 458 "0: le %%f2,%1\n" 459 "1: cefbr %%f0,%2\n" 460 " debr %%f0,%%f2\n" 461 " cgebr %0,5,%%f0\n" 462 : "=&d" (capability) 463 : "Q" (info->capability), "d" (10000000), "d" (0) 464 : "cc" 465 ); 466 kernel_fpu_end(&fpu, KERNEL_FPR); 467 } else 468 /* 469 * Really old machine without stsi block for basic 470 * cpu information. Report 42.0 bogomips. 471 */ 472 capability = 42; 473 loops_per_jiffy = capability * (500000/HZ); 474 free_page((unsigned long) info); 475 } 476 477 /* 478 * calibrate the delay loop 479 */ 480 void calibrate_delay(void) 481 { 482 s390_adjust_jiffies(); 483 /* Print the good old Bogomips line .. */ 484 printk(KERN_DEBUG "Calibrating delay loop (skipped)... " 485 "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ), 486 (loops_per_jiffy/(5000/HZ)) % 100); 487 } 488