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