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 int topology_max_mnest; 26 27 /* 28 * stsi - store system information 29 * 30 * Returns the current configuration level if function code 0 was specified. 31 * Otherwise returns 0 on success or a negative value on error. 32 */ 33 int stsi(void *sysinfo, int fc, int sel1, int sel2) 34 { 35 register int r0 asm("0") = (fc << 28) | sel1; 36 register int r1 asm("1") = sel2; 37 int rc = 0; 38 39 asm volatile( 40 " stsi 0(%3)\n" 41 "0: jz 2f\n" 42 "1: lhi %1,%4\n" 43 "2:\n" 44 EX_TABLE(0b, 1b) 45 : "+d" (r0), "+d" (rc) 46 : "d" (r1), "a" (sysinfo), "K" (-EOPNOTSUPP) 47 : "cc", "memory"); 48 if (rc) 49 return rc; 50 return fc ? 0 : ((unsigned int) r0) >> 28; 51 } 52 EXPORT_SYMBOL(stsi); 53 54 static void stsi_1_1_1(struct seq_file *m, struct sysinfo_1_1_1 *info) 55 { 56 int i; 57 58 if (stsi(info, 1, 1, 1)) 59 return; 60 EBCASC(info->manufacturer, sizeof(info->manufacturer)); 61 EBCASC(info->type, sizeof(info->type)); 62 EBCASC(info->model, sizeof(info->model)); 63 EBCASC(info->sequence, sizeof(info->sequence)); 64 EBCASC(info->plant, sizeof(info->plant)); 65 EBCASC(info->model_capacity, sizeof(info->model_capacity)); 66 EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap)); 67 EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap)); 68 seq_printf(m, "Manufacturer: %-16.16s\n", info->manufacturer); 69 seq_printf(m, "Type: %-4.4s\n", info->type); 70 /* 71 * Sigh: the model field has been renamed with System z9 72 * to model_capacity and a new model field has been added 73 * after the plant field. To avoid confusing older programs 74 * the "Model:" prints "model_capacity model" or just 75 * "model_capacity" if the model string is empty . 76 */ 77 seq_printf(m, "Model: %-16.16s", info->model_capacity); 78 if (info->model[0] != '\0') 79 seq_printf(m, " %-16.16s", info->model); 80 seq_putc(m, '\n'); 81 seq_printf(m, "Sequence Code: %-16.16s\n", info->sequence); 82 seq_printf(m, "Plant: %-4.4s\n", info->plant); 83 seq_printf(m, "Model Capacity: %-16.16s %08u\n", 84 info->model_capacity, info->model_cap_rating); 85 if (info->model_perm_cap_rating) 86 seq_printf(m, "Model Perm. Capacity: %-16.16s %08u\n", 87 info->model_perm_cap, 88 info->model_perm_cap_rating); 89 if (info->model_temp_cap_rating) 90 seq_printf(m, "Model Temp. Capacity: %-16.16s %08u\n", 91 info->model_temp_cap, 92 info->model_temp_cap_rating); 93 if (info->ncr) 94 seq_printf(m, "Nominal Cap. Rating: %08u\n", info->ncr); 95 if (info->npr) 96 seq_printf(m, "Nominal Perm. Rating: %08u\n", info->npr); 97 if (info->ntr) 98 seq_printf(m, "Nominal Temp. Rating: %08u\n", info->ntr); 99 if (info->cai) { 100 seq_printf(m, "Capacity Adj. Ind.: %d\n", info->cai); 101 seq_printf(m, "Capacity Ch. Reason: %d\n", info->ccr); 102 seq_printf(m, "Capacity Transient: %d\n", info->t); 103 } 104 if (info->p) { 105 for (i = 1; i <= ARRAY_SIZE(info->typepct); i++) { 106 seq_printf(m, "Type %d Percentage: %d\n", 107 i, info->typepct[i - 1]); 108 } 109 } 110 } 111 112 static void stsi_15_1_x(struct seq_file *m, struct sysinfo_15_1_x *info) 113 { 114 int i; 115 116 seq_putc(m, '\n'); 117 if (!MACHINE_HAS_TOPOLOGY) 118 return; 119 if (stsi(info, 15, 1, topology_max_mnest)) 120 return; 121 seq_printf(m, "CPU Topology HW: "); 122 for (i = 0; i < TOPOLOGY_NR_MAG; i++) 123 seq_printf(m, " %d", info->mag[i]); 124 seq_putc(m, '\n'); 125 #ifdef CONFIG_SCHED_TOPOLOGY 126 store_topology(info); 127 seq_printf(m, "CPU Topology SW: "); 128 for (i = 0; i < TOPOLOGY_NR_MAG; i++) 129 seq_printf(m, " %d", info->mag[i]); 130 seq_putc(m, '\n'); 131 #endif 132 } 133 134 static void stsi_1_2_2(struct seq_file *m, struct sysinfo_1_2_2 *info) 135 { 136 struct sysinfo_1_2_2_extension *ext; 137 int i; 138 139 if (stsi(info, 1, 2, 2)) 140 return; 141 ext = (struct sysinfo_1_2_2_extension *) 142 ((unsigned long) info + info->acc_offset); 143 seq_printf(m, "CPUs Total: %d\n", info->cpus_total); 144 seq_printf(m, "CPUs Configured: %d\n", info->cpus_configured); 145 seq_printf(m, "CPUs Standby: %d\n", info->cpus_standby); 146 seq_printf(m, "CPUs Reserved: %d\n", info->cpus_reserved); 147 /* 148 * Sigh 2. According to the specification the alternate 149 * capability field is a 32 bit floating point number 150 * if the higher order 8 bits are not zero. Printing 151 * a floating point number in the kernel is a no-no, 152 * always print the number as 32 bit unsigned integer. 153 * The user-space needs to know about the strange 154 * encoding of the alternate cpu capability. 155 */ 156 seq_printf(m, "Capability: %u", info->capability); 157 if (info->format == 1) 158 seq_printf(m, " %u", ext->alt_capability); 159 seq_putc(m, '\n'); 160 if (info->nominal_cap) 161 seq_printf(m, "Nominal Capability: %d\n", info->nominal_cap); 162 if (info->secondary_cap) 163 seq_printf(m, "Secondary Capability: %d\n", info->secondary_cap); 164 for (i = 2; i <= info->cpus_total; i++) { 165 seq_printf(m, "Adjustment %02d-way: %u", 166 i, info->adjustment[i-2]); 167 if (info->format == 1) 168 seq_printf(m, " %u", ext->alt_adjustment[i-2]); 169 seq_putc(m, '\n'); 170 } 171 } 172 173 static void stsi_2_2_2(struct seq_file *m, struct sysinfo_2_2_2 *info) 174 { 175 if (stsi(info, 2, 2, 2)) 176 return; 177 EBCASC(info->name, sizeof(info->name)); 178 seq_putc(m, '\n'); 179 seq_printf(m, "LPAR Number: %d\n", info->lpar_number); 180 seq_printf(m, "LPAR Characteristics: "); 181 if (info->characteristics & LPAR_CHAR_DEDICATED) 182 seq_printf(m, "Dedicated "); 183 if (info->characteristics & LPAR_CHAR_SHARED) 184 seq_printf(m, "Shared "); 185 if (info->characteristics & LPAR_CHAR_LIMITED) 186 seq_printf(m, "Limited "); 187 seq_putc(m, '\n'); 188 seq_printf(m, "LPAR Name: %-8.8s\n", info->name); 189 seq_printf(m, "LPAR Adjustment: %d\n", info->caf); 190 seq_printf(m, "LPAR CPUs Total: %d\n", info->cpus_total); 191 seq_printf(m, "LPAR CPUs Configured: %d\n", info->cpus_configured); 192 seq_printf(m, "LPAR CPUs Standby: %d\n", info->cpus_standby); 193 seq_printf(m, "LPAR CPUs Reserved: %d\n", info->cpus_reserved); 194 seq_printf(m, "LPAR CPUs Dedicated: %d\n", info->cpus_dedicated); 195 seq_printf(m, "LPAR CPUs Shared: %d\n", info->cpus_shared); 196 if (info->mt_installed & 0x80) { 197 seq_printf(m, "LPAR CPUs G-MTID: %d\n", 198 info->mt_general & 0x1f); 199 seq_printf(m, "LPAR CPUs S-MTID: %d\n", 200 info->mt_installed & 0x1f); 201 seq_printf(m, "LPAR CPUs PS-MTID: %d\n", 202 info->mt_psmtid & 0x1f); 203 } 204 } 205 206 static void print_ext_name(struct seq_file *m, int lvl, 207 struct sysinfo_3_2_2 *info) 208 { 209 if (info->vm[lvl].ext_name_encoding == 0) 210 return; 211 if (info->ext_names[lvl][0] == 0) 212 return; 213 switch (info->vm[lvl].ext_name_encoding) { 214 case 1: /* EBCDIC */ 215 EBCASC(info->ext_names[lvl], sizeof(info->ext_names[lvl])); 216 break; 217 case 2: /* UTF-8 */ 218 break; 219 default: 220 return; 221 } 222 seq_printf(m, "VM%02d Extended Name: %-.256s\n", lvl, 223 info->ext_names[lvl]); 224 } 225 226 static void print_uuid(struct seq_file *m, int i, struct sysinfo_3_2_2 *info) 227 { 228 if (!memcmp(&info->vm[i].uuid, &NULL_UUID_BE, sizeof(uuid_be))) 229 return; 230 seq_printf(m, "VM%02d UUID: %pUb\n", i, &info->vm[i].uuid); 231 } 232 233 static void stsi_3_2_2(struct seq_file *m, struct sysinfo_3_2_2 *info) 234 { 235 int i; 236 237 if (stsi(info, 3, 2, 2)) 238 return; 239 for (i = 0; i < info->count; i++) { 240 EBCASC(info->vm[i].name, sizeof(info->vm[i].name)); 241 EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi)); 242 seq_putc(m, '\n'); 243 seq_printf(m, "VM%02d Name: %-8.8s\n", i, info->vm[i].name); 244 seq_printf(m, "VM%02d Control Program: %-16.16s\n", i, info->vm[i].cpi); 245 seq_printf(m, "VM%02d Adjustment: %d\n", i, info->vm[i].caf); 246 seq_printf(m, "VM%02d CPUs Total: %d\n", i, info->vm[i].cpus_total); 247 seq_printf(m, "VM%02d CPUs Configured: %d\n", i, info->vm[i].cpus_configured); 248 seq_printf(m, "VM%02d CPUs Standby: %d\n", i, info->vm[i].cpus_standby); 249 seq_printf(m, "VM%02d CPUs Reserved: %d\n", i, info->vm[i].cpus_reserved); 250 print_ext_name(m, i, info); 251 print_uuid(m, i, info); 252 } 253 } 254 255 static int sysinfo_show(struct seq_file *m, void *v) 256 { 257 void *info = (void *)get_zeroed_page(GFP_KERNEL); 258 int level; 259 260 if (!info) 261 return 0; 262 level = stsi(NULL, 0, 0, 0); 263 if (level >= 1) 264 stsi_1_1_1(m, info); 265 if (level >= 1) 266 stsi_15_1_x(m, info); 267 if (level >= 1) 268 stsi_1_2_2(m, info); 269 if (level >= 2) 270 stsi_2_2_2(m, info); 271 if (level >= 3) 272 stsi_3_2_2(m, info); 273 free_page((unsigned long)info); 274 return 0; 275 } 276 277 static int sysinfo_open(struct inode *inode, struct file *file) 278 { 279 return single_open(file, sysinfo_show, NULL); 280 } 281 282 static const struct file_operations sysinfo_fops = { 283 .open = sysinfo_open, 284 .read = seq_read, 285 .llseek = seq_lseek, 286 .release = single_release, 287 }; 288 289 static int __init sysinfo_create_proc(void) 290 { 291 proc_create("sysinfo", 0444, NULL, &sysinfo_fops); 292 return 0; 293 } 294 device_initcall(sysinfo_create_proc); 295 296 /* 297 * Service levels interface. 298 */ 299 300 static DECLARE_RWSEM(service_level_sem); 301 static LIST_HEAD(service_level_list); 302 303 int register_service_level(struct service_level *slr) 304 { 305 struct service_level *ptr; 306 307 down_write(&service_level_sem); 308 list_for_each_entry(ptr, &service_level_list, list) 309 if (ptr == slr) { 310 up_write(&service_level_sem); 311 return -EEXIST; 312 } 313 list_add_tail(&slr->list, &service_level_list); 314 up_write(&service_level_sem); 315 return 0; 316 } 317 EXPORT_SYMBOL(register_service_level); 318 319 int unregister_service_level(struct service_level *slr) 320 { 321 struct service_level *ptr, *next; 322 int rc = -ENOENT; 323 324 down_write(&service_level_sem); 325 list_for_each_entry_safe(ptr, next, &service_level_list, list) { 326 if (ptr != slr) 327 continue; 328 list_del(&ptr->list); 329 rc = 0; 330 break; 331 } 332 up_write(&service_level_sem); 333 return rc; 334 } 335 EXPORT_SYMBOL(unregister_service_level); 336 337 static void *service_level_start(struct seq_file *m, loff_t *pos) 338 { 339 down_read(&service_level_sem); 340 return seq_list_start(&service_level_list, *pos); 341 } 342 343 static void *service_level_next(struct seq_file *m, void *p, loff_t *pos) 344 { 345 return seq_list_next(p, &service_level_list, pos); 346 } 347 348 static void service_level_stop(struct seq_file *m, void *p) 349 { 350 up_read(&service_level_sem); 351 } 352 353 static int service_level_show(struct seq_file *m, void *p) 354 { 355 struct service_level *slr; 356 357 slr = list_entry(p, struct service_level, list); 358 slr->seq_print(m, slr); 359 return 0; 360 } 361 362 static const struct seq_operations service_level_seq_ops = { 363 .start = service_level_start, 364 .next = service_level_next, 365 .stop = service_level_stop, 366 .show = service_level_show 367 }; 368 369 static int service_level_open(struct inode *inode, struct file *file) 370 { 371 return seq_open(file, &service_level_seq_ops); 372 } 373 374 static const struct file_operations service_level_ops = { 375 .open = service_level_open, 376 .read = seq_read, 377 .llseek = seq_lseek, 378 .release = seq_release 379 }; 380 381 static void service_level_vm_print(struct seq_file *m, 382 struct service_level *slr) 383 { 384 char *query_buffer, *str; 385 386 query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA); 387 if (!query_buffer) 388 return; 389 cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL); 390 str = strchr(query_buffer, '\n'); 391 if (str) 392 *str = 0; 393 seq_printf(m, "VM: %s\n", query_buffer); 394 kfree(query_buffer); 395 } 396 397 static struct service_level service_level_vm = { 398 .seq_print = service_level_vm_print 399 }; 400 401 static __init int create_proc_service_level(void) 402 { 403 proc_create("service_levels", 0, NULL, &service_level_ops); 404 if (MACHINE_IS_VM) 405 register_service_level(&service_level_vm); 406 return 0; 407 } 408 subsys_initcall(create_proc_service_level); 409 410 /* 411 * CPU capability might have changed. Therefore recalculate loops_per_jiffy. 412 */ 413 void s390_adjust_jiffies(void) 414 { 415 struct sysinfo_1_2_2 *info; 416 const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */ 417 FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR); 418 FP_DECL_EX; 419 unsigned int capability; 420 421 info = (void *) get_zeroed_page(GFP_KERNEL); 422 if (!info) 423 return; 424 425 if (stsi(info, 1, 2, 2) == 0) { 426 /* 427 * Major sigh. The cpu capability encoding is "special". 428 * If the first 9 bits of info->capability are 0 then it 429 * is a 32 bit unsigned integer in the range 0 .. 2^23. 430 * If the first 9 bits are != 0 then it is a 32 bit float. 431 * In addition a lower value indicates a proportionally 432 * higher cpu capacity. Bogomips are the other way round. 433 * To get to a halfway suitable number we divide 1e7 434 * by the cpu capability number. Yes, that means a floating 435 * point division .. math-emu here we come :-) 436 */ 437 FP_UNPACK_SP(SA, &fmil); 438 if ((info->capability >> 23) == 0) 439 FP_FROM_INT_S(SB, (long) info->capability, 64, long); 440 else 441 FP_UNPACK_SP(SB, &info->capability); 442 FP_DIV_S(SR, SA, SB); 443 FP_TO_INT_S(capability, SR, 32, 0); 444 } else 445 /* 446 * Really old machine without stsi block for basic 447 * cpu information. Report 42.0 bogomips. 448 */ 449 capability = 42; 450 loops_per_jiffy = capability * (500000/HZ); 451 free_page((unsigned long) info); 452 } 453 454 /* 455 * calibrate the delay loop 456 */ 457 void calibrate_delay(void) 458 { 459 s390_adjust_jiffies(); 460 /* Print the good old Bogomips line .. */ 461 printk(KERN_DEBUG "Calibrating delay loop (skipped)... " 462 "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ), 463 (loops_per_jiffy/(5000/HZ)) % 100); 464 } 465