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 static int max_mnest; 115 int i, rc; 116 117 seq_putc(m, '\n'); 118 if (!MACHINE_HAS_TOPOLOGY) 119 return; 120 if (stsi(info, 15, 1, topology_max_mnest)) 121 return; 122 seq_printf(m, "CPU Topology HW: "); 123 for (i = 0; i < TOPOLOGY_NR_MAG; i++) 124 seq_printf(m, " %d", info->mag[i]); 125 seq_putc(m, '\n'); 126 #ifdef CONFIG_SCHED_MC 127 store_topology(info); 128 seq_printf(m, "CPU Topology SW: "); 129 for (i = 0; i < TOPOLOGY_NR_MAG; i++) 130 seq_printf(m, " %d", info->mag[i]); 131 seq_putc(m, '\n'); 132 #endif 133 } 134 135 static void stsi_1_2_2(struct seq_file *m, struct sysinfo_1_2_2 *info) 136 { 137 struct sysinfo_1_2_2_extension *ext; 138 int i; 139 140 if (stsi(info, 1, 2, 2)) 141 return; 142 ext = (struct sysinfo_1_2_2_extension *) 143 ((unsigned long) info + info->acc_offset); 144 seq_printf(m, "CPUs Total: %d\n", info->cpus_total); 145 seq_printf(m, "CPUs Configured: %d\n", info->cpus_configured); 146 seq_printf(m, "CPUs Standby: %d\n", info->cpus_standby); 147 seq_printf(m, "CPUs Reserved: %d\n", info->cpus_reserved); 148 /* 149 * Sigh 2. According to the specification the alternate 150 * capability field is a 32 bit floating point number 151 * if the higher order 8 bits are not zero. Printing 152 * a floating point number in the kernel is a no-no, 153 * always print the number as 32 bit unsigned integer. 154 * The user-space needs to know about the strange 155 * encoding of the alternate cpu capability. 156 */ 157 seq_printf(m, "Capability: %u", info->capability); 158 if (info->format == 1) 159 seq_printf(m, " %u", ext->alt_capability); 160 seq_putc(m, '\n'); 161 if (info->nominal_cap) 162 seq_printf(m, "Nominal Capability: %d\n", info->nominal_cap); 163 if (info->secondary_cap) 164 seq_printf(m, "Secondary Capability: %d\n", info->secondary_cap); 165 for (i = 2; i <= info->cpus_total; i++) { 166 seq_printf(m, "Adjustment %02d-way: %u", 167 i, info->adjustment[i-2]); 168 if (info->format == 1) 169 seq_printf(m, " %u", ext->alt_adjustment[i-2]); 170 seq_putc(m, '\n'); 171 } 172 } 173 174 static void stsi_2_2_2(struct seq_file *m, struct sysinfo_2_2_2 *info) 175 { 176 if (stsi(info, 2, 2, 2)) 177 return; 178 EBCASC(info->name, sizeof(info->name)); 179 seq_putc(m, '\n'); 180 seq_printf(m, "LPAR Number: %d\n", info->lpar_number); 181 seq_printf(m, "LPAR Characteristics: "); 182 if (info->characteristics & LPAR_CHAR_DEDICATED) 183 seq_printf(m, "Dedicated "); 184 if (info->characteristics & LPAR_CHAR_SHARED) 185 seq_printf(m, "Shared "); 186 if (info->characteristics & LPAR_CHAR_LIMITED) 187 seq_printf(m, "Limited "); 188 seq_putc(m, '\n'); 189 seq_printf(m, "LPAR Name: %-8.8s\n", info->name); 190 seq_printf(m, "LPAR Adjustment: %d\n", info->caf); 191 seq_printf(m, "LPAR CPUs Total: %d\n", info->cpus_total); 192 seq_printf(m, "LPAR CPUs Configured: %d\n", info->cpus_configured); 193 seq_printf(m, "LPAR CPUs Standby: %d\n", info->cpus_standby); 194 seq_printf(m, "LPAR CPUs Reserved: %d\n", info->cpus_reserved); 195 seq_printf(m, "LPAR CPUs Dedicated: %d\n", info->cpus_dedicated); 196 seq_printf(m, "LPAR CPUs Shared: %d\n", info->cpus_shared); 197 if (info->mt_installed & 0x80) { 198 seq_printf(m, "LPAR CPUs G-MTID: %d\n", 199 info->mt_general & 0x1f); 200 seq_printf(m, "LPAR CPUs S-MTID: %d\n", 201 info->mt_installed & 0x1f); 202 seq_printf(m, "LPAR CPUs PS-MTID: %d\n", 203 info->mt_psmtid & 0x1f); 204 } 205 } 206 207 static void print_ext_name(struct seq_file *m, int lvl, 208 struct sysinfo_3_2_2 *info) 209 { 210 if (info->vm[lvl].ext_name_encoding == 0) 211 return; 212 if (info->ext_names[lvl][0] == 0) 213 return; 214 switch (info->vm[lvl].ext_name_encoding) { 215 case 1: /* EBCDIC */ 216 EBCASC(info->ext_names[lvl], sizeof(info->ext_names[lvl])); 217 break; 218 case 2: /* UTF-8 */ 219 break; 220 default: 221 return; 222 } 223 seq_printf(m, "VM%02d Extended Name: %-.256s\n", lvl, 224 info->ext_names[lvl]); 225 } 226 227 static void print_uuid(struct seq_file *m, int i, struct sysinfo_3_2_2 *info) 228 { 229 if (!memcmp(&info->vm[i].uuid, &NULL_UUID_BE, sizeof(uuid_be))) 230 return; 231 seq_printf(m, "VM%02d UUID: %pUb\n", i, &info->vm[i].uuid); 232 } 233 234 static void stsi_3_2_2(struct seq_file *m, struct sysinfo_3_2_2 *info) 235 { 236 int i; 237 238 if (stsi(info, 3, 2, 2)) 239 return; 240 for (i = 0; i < info->count; i++) { 241 EBCASC(info->vm[i].name, sizeof(info->vm[i].name)); 242 EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi)); 243 seq_putc(m, '\n'); 244 seq_printf(m, "VM%02d Name: %-8.8s\n", i, info->vm[i].name); 245 seq_printf(m, "VM%02d Control Program: %-16.16s\n", i, info->vm[i].cpi); 246 seq_printf(m, "VM%02d Adjustment: %d\n", i, info->vm[i].caf); 247 seq_printf(m, "VM%02d CPUs Total: %d\n", i, info->vm[i].cpus_total); 248 seq_printf(m, "VM%02d CPUs Configured: %d\n", i, info->vm[i].cpus_configured); 249 seq_printf(m, "VM%02d CPUs Standby: %d\n", i, info->vm[i].cpus_standby); 250 seq_printf(m, "VM%02d CPUs Reserved: %d\n", i, info->vm[i].cpus_reserved); 251 print_ext_name(m, i, info); 252 print_uuid(m, i, info); 253 } 254 } 255 256 static int sysinfo_show(struct seq_file *m, void *v) 257 { 258 void *info = (void *)get_zeroed_page(GFP_KERNEL); 259 int level; 260 261 if (!info) 262 return 0; 263 level = stsi(NULL, 0, 0, 0); 264 if (level >= 1) 265 stsi_1_1_1(m, info); 266 if (level >= 1) 267 stsi_15_1_x(m, info); 268 if (level >= 1) 269 stsi_1_2_2(m, info); 270 if (level >= 2) 271 stsi_2_2_2(m, info); 272 if (level >= 3) 273 stsi_3_2_2(m, info); 274 free_page((unsigned long)info); 275 return 0; 276 } 277 278 static int sysinfo_open(struct inode *inode, struct file *file) 279 { 280 return single_open(file, sysinfo_show, NULL); 281 } 282 283 static const struct file_operations sysinfo_fops = { 284 .open = sysinfo_open, 285 .read = seq_read, 286 .llseek = seq_lseek, 287 .release = single_release, 288 }; 289 290 static int __init sysinfo_create_proc(void) 291 { 292 proc_create("sysinfo", 0444, NULL, &sysinfo_fops); 293 return 0; 294 } 295 device_initcall(sysinfo_create_proc); 296 297 /* 298 * Service levels interface. 299 */ 300 301 static DECLARE_RWSEM(service_level_sem); 302 static LIST_HEAD(service_level_list); 303 304 int register_service_level(struct service_level *slr) 305 { 306 struct service_level *ptr; 307 308 down_write(&service_level_sem); 309 list_for_each_entry(ptr, &service_level_list, list) 310 if (ptr == slr) { 311 up_write(&service_level_sem); 312 return -EEXIST; 313 } 314 list_add_tail(&slr->list, &service_level_list); 315 up_write(&service_level_sem); 316 return 0; 317 } 318 EXPORT_SYMBOL(register_service_level); 319 320 int unregister_service_level(struct service_level *slr) 321 { 322 struct service_level *ptr, *next; 323 int rc = -ENOENT; 324 325 down_write(&service_level_sem); 326 list_for_each_entry_safe(ptr, next, &service_level_list, list) { 327 if (ptr != slr) 328 continue; 329 list_del(&ptr->list); 330 rc = 0; 331 break; 332 } 333 up_write(&service_level_sem); 334 return rc; 335 } 336 EXPORT_SYMBOL(unregister_service_level); 337 338 static void *service_level_start(struct seq_file *m, loff_t *pos) 339 { 340 down_read(&service_level_sem); 341 return seq_list_start(&service_level_list, *pos); 342 } 343 344 static void *service_level_next(struct seq_file *m, void *p, loff_t *pos) 345 { 346 return seq_list_next(p, &service_level_list, pos); 347 } 348 349 static void service_level_stop(struct seq_file *m, void *p) 350 { 351 up_read(&service_level_sem); 352 } 353 354 static int service_level_show(struct seq_file *m, void *p) 355 { 356 struct service_level *slr; 357 358 slr = list_entry(p, struct service_level, list); 359 slr->seq_print(m, slr); 360 return 0; 361 } 362 363 static const struct seq_operations service_level_seq_ops = { 364 .start = service_level_start, 365 .next = service_level_next, 366 .stop = service_level_stop, 367 .show = service_level_show 368 }; 369 370 static int service_level_open(struct inode *inode, struct file *file) 371 { 372 return seq_open(file, &service_level_seq_ops); 373 } 374 375 static const struct file_operations service_level_ops = { 376 .open = service_level_open, 377 .read = seq_read, 378 .llseek = seq_lseek, 379 .release = seq_release 380 }; 381 382 static void service_level_vm_print(struct seq_file *m, 383 struct service_level *slr) 384 { 385 char *query_buffer, *str; 386 387 query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA); 388 if (!query_buffer) 389 return; 390 cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL); 391 str = strchr(query_buffer, '\n'); 392 if (str) 393 *str = 0; 394 seq_printf(m, "VM: %s\n", query_buffer); 395 kfree(query_buffer); 396 } 397 398 static struct service_level service_level_vm = { 399 .seq_print = service_level_vm_print 400 }; 401 402 static __init int create_proc_service_level(void) 403 { 404 proc_create("service_levels", 0, NULL, &service_level_ops); 405 if (MACHINE_IS_VM) 406 register_service_level(&service_level_vm); 407 return 0; 408 } 409 subsys_initcall(create_proc_service_level); 410 411 /* 412 * CPU capability might have changed. Therefore recalculate loops_per_jiffy. 413 */ 414 void s390_adjust_jiffies(void) 415 { 416 struct sysinfo_1_2_2 *info; 417 const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */ 418 FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR); 419 FP_DECL_EX; 420 unsigned int capability; 421 422 info = (void *) get_zeroed_page(GFP_KERNEL); 423 if (!info) 424 return; 425 426 if (stsi(info, 1, 2, 2) == 0) { 427 /* 428 * Major sigh. The cpu capability encoding is "special". 429 * If the first 9 bits of info->capability are 0 then it 430 * is a 32 bit unsigned integer in the range 0 .. 2^23. 431 * If the first 9 bits are != 0 then it is a 32 bit float. 432 * In addition a lower value indicates a proportionally 433 * higher cpu capacity. Bogomips are the other way round. 434 * To get to a halfway suitable number we divide 1e7 435 * by the cpu capability number. Yes, that means a floating 436 * point division .. math-emu here we come :-) 437 */ 438 FP_UNPACK_SP(SA, &fmil); 439 if ((info->capability >> 23) == 0) 440 FP_FROM_INT_S(SB, (long) info->capability, 64, long); 441 else 442 FP_UNPACK_SP(SB, &info->capability); 443 FP_DIV_S(SR, SA, SB); 444 FP_TO_INT_S(capability, SR, 32, 0); 445 } else 446 /* 447 * Really old machine without stsi block for basic 448 * cpu information. Report 42.0 bogomips. 449 */ 450 capability = 42; 451 loops_per_jiffy = capability * (500000/HZ); 452 free_page((unsigned long) info); 453 } 454 455 /* 456 * calibrate the delay loop 457 */ 458 void calibrate_delay(void) 459 { 460 s390_adjust_jiffies(); 461 /* Print the good old Bogomips line .. */ 462 printk(KERN_DEBUG "Calibrating delay loop (skipped)... " 463 "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ), 464 (loops_per_jiffy/(5000/HZ)) % 100); 465 } 466