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 <asm/ebcdic.h> 15 #include <asm/sysinfo.h> 16 #include <asm/cpcmd.h> 17 18 /* Sigh, math-emu. Don't ask. */ 19 #include <asm/sfp-util.h> 20 #include <math-emu/soft-fp.h> 21 #include <math-emu/single.h> 22 23 static inline int stsi_0(void) 24 { 25 int rc = stsi(NULL, 0, 0, 0); 26 return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28); 27 } 28 29 static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len) 30 { 31 if (stsi(info, 1, 1, 1) == -ENOSYS) 32 return len; 33 34 EBCASC(info->manufacturer, sizeof(info->manufacturer)); 35 EBCASC(info->type, sizeof(info->type)); 36 EBCASC(info->model, sizeof(info->model)); 37 EBCASC(info->sequence, sizeof(info->sequence)); 38 EBCASC(info->plant, sizeof(info->plant)); 39 EBCASC(info->model_capacity, sizeof(info->model_capacity)); 40 EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap)); 41 EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap)); 42 len += sprintf(page + len, "Manufacturer: %-16.16s\n", 43 info->manufacturer); 44 len += sprintf(page + len, "Type: %-4.4s\n", 45 info->type); 46 if (info->model[0] != '\0') 47 /* 48 * Sigh: the model field has been renamed with System z9 49 * to model_capacity and a new model field has been added 50 * after the plant field. To avoid confusing older programs 51 * the "Model:" prints "model_capacity model" or just 52 * "model_capacity" if the model string is empty . 53 */ 54 len += sprintf(page + len, 55 "Model: %-16.16s %-16.16s\n", 56 info->model_capacity, info->model); 57 else 58 len += sprintf(page + len, "Model: %-16.16s\n", 59 info->model_capacity); 60 len += sprintf(page + len, "Sequence Code: %-16.16s\n", 61 info->sequence); 62 len += sprintf(page + len, "Plant: %-4.4s\n", 63 info->plant); 64 len += sprintf(page + len, "Model Capacity: %-16.16s %08u\n", 65 info->model_capacity, *(u32 *) info->model_cap_rating); 66 if (info->model_perm_cap[0] != '\0') 67 len += sprintf(page + len, 68 "Model Perm. Capacity: %-16.16s %08u\n", 69 info->model_perm_cap, 70 *(u32 *) info->model_perm_cap_rating); 71 if (info->model_temp_cap[0] != '\0') 72 len += sprintf(page + len, 73 "Model Temp. Capacity: %-16.16s %08u\n", 74 info->model_temp_cap, 75 *(u32 *) info->model_temp_cap_rating); 76 return len; 77 } 78 79 static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len) 80 { 81 struct sysinfo_1_2_2_extension *ext; 82 int i; 83 84 if (stsi(info, 1, 2, 2) == -ENOSYS) 85 return len; 86 ext = (struct sysinfo_1_2_2_extension *) 87 ((unsigned long) info + info->acc_offset); 88 89 len += sprintf(page + len, "\n"); 90 len += sprintf(page + len, "CPUs Total: %d\n", 91 info->cpus_total); 92 len += sprintf(page + len, "CPUs Configured: %d\n", 93 info->cpus_configured); 94 len += sprintf(page + len, "CPUs Standby: %d\n", 95 info->cpus_standby); 96 len += sprintf(page + len, "CPUs Reserved: %d\n", 97 info->cpus_reserved); 98 99 if (info->format == 1) { 100 /* 101 * Sigh 2. According to the specification the alternate 102 * capability field is a 32 bit floating point number 103 * if the higher order 8 bits are not zero. Printing 104 * a floating point number in the kernel is a no-no, 105 * always print the number as 32 bit unsigned integer. 106 * The user-space needs to know about the strange 107 * encoding of the alternate cpu capability. 108 */ 109 len += sprintf(page + len, "Capability: %u %u\n", 110 info->capability, ext->alt_capability); 111 for (i = 2; i <= info->cpus_total; i++) 112 len += sprintf(page + len, 113 "Adjustment %02d-way: %u %u\n", 114 i, info->adjustment[i-2], 115 ext->alt_adjustment[i-2]); 116 117 } else { 118 len += sprintf(page + len, "Capability: %u\n", 119 info->capability); 120 for (i = 2; i <= info->cpus_total; i++) 121 len += sprintf(page + len, 122 "Adjustment %02d-way: %u\n", 123 i, info->adjustment[i-2]); 124 } 125 126 if (info->secondary_capability != 0) 127 len += sprintf(page + len, "Secondary Capability: %d\n", 128 info->secondary_capability); 129 return len; 130 } 131 132 static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len) 133 { 134 if (stsi(info, 2, 2, 2) == -ENOSYS) 135 return len; 136 137 EBCASC(info->name, sizeof(info->name)); 138 139 len += sprintf(page + len, "\n"); 140 len += sprintf(page + len, "LPAR Number: %d\n", 141 info->lpar_number); 142 143 len += sprintf(page + len, "LPAR Characteristics: "); 144 if (info->characteristics & LPAR_CHAR_DEDICATED) 145 len += sprintf(page + len, "Dedicated "); 146 if (info->characteristics & LPAR_CHAR_SHARED) 147 len += sprintf(page + len, "Shared "); 148 if (info->characteristics & LPAR_CHAR_LIMITED) 149 len += sprintf(page + len, "Limited "); 150 len += sprintf(page + len, "\n"); 151 152 len += sprintf(page + len, "LPAR Name: %-8.8s\n", 153 info->name); 154 155 len += sprintf(page + len, "LPAR Adjustment: %d\n", 156 info->caf); 157 158 len += sprintf(page + len, "LPAR CPUs Total: %d\n", 159 info->cpus_total); 160 len += sprintf(page + len, "LPAR CPUs Configured: %d\n", 161 info->cpus_configured); 162 len += sprintf(page + len, "LPAR CPUs Standby: %d\n", 163 info->cpus_standby); 164 len += sprintf(page + len, "LPAR CPUs Reserved: %d\n", 165 info->cpus_reserved); 166 len += sprintf(page + len, "LPAR CPUs Dedicated: %d\n", 167 info->cpus_dedicated); 168 len += sprintf(page + len, "LPAR CPUs Shared: %d\n", 169 info->cpus_shared); 170 return len; 171 } 172 173 static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len) 174 { 175 int i; 176 177 if (stsi(info, 3, 2, 2) == -ENOSYS) 178 return len; 179 for (i = 0; i < info->count; i++) { 180 EBCASC(info->vm[i].name, sizeof(info->vm[i].name)); 181 EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi)); 182 len += sprintf(page + len, "\n"); 183 len += sprintf(page + len, "VM%02d Name: %-8.8s\n", 184 i, info->vm[i].name); 185 len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n", 186 i, info->vm[i].cpi); 187 188 len += sprintf(page + len, "VM%02d Adjustment: %d\n", 189 i, info->vm[i].caf); 190 191 len += sprintf(page + len, "VM%02d CPUs Total: %d\n", 192 i, info->vm[i].cpus_total); 193 len += sprintf(page + len, "VM%02d CPUs Configured: %d\n", 194 i, info->vm[i].cpus_configured); 195 len += sprintf(page + len, "VM%02d CPUs Standby: %d\n", 196 i, info->vm[i].cpus_standby); 197 len += sprintf(page + len, "VM%02d CPUs Reserved: %d\n", 198 i, info->vm[i].cpus_reserved); 199 } 200 return len; 201 } 202 203 static int proc_read_sysinfo(char *page, char **start, 204 off_t off, int count, 205 int *eof, void *data) 206 { 207 unsigned long info = get_zeroed_page(GFP_KERNEL); 208 int level, len; 209 210 if (!info) 211 return 0; 212 213 len = 0; 214 level = stsi_0(); 215 if (level >= 1) 216 len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len); 217 218 if (level >= 1) 219 len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len); 220 221 if (level >= 2) 222 len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len); 223 224 if (level >= 3) 225 len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len); 226 227 free_page(info); 228 return len; 229 } 230 231 static __init int create_proc_sysinfo(void) 232 { 233 create_proc_read_entry("sysinfo", 0444, NULL, 234 proc_read_sysinfo, NULL); 235 return 0; 236 } 237 device_initcall(create_proc_sysinfo); 238 239 /* 240 * Service levels interface. 241 */ 242 243 static DECLARE_RWSEM(service_level_sem); 244 static LIST_HEAD(service_level_list); 245 246 int register_service_level(struct service_level *slr) 247 { 248 struct service_level *ptr; 249 250 down_write(&service_level_sem); 251 list_for_each_entry(ptr, &service_level_list, list) 252 if (ptr == slr) { 253 up_write(&service_level_sem); 254 return -EEXIST; 255 } 256 list_add_tail(&slr->list, &service_level_list); 257 up_write(&service_level_sem); 258 return 0; 259 } 260 EXPORT_SYMBOL(register_service_level); 261 262 int unregister_service_level(struct service_level *slr) 263 { 264 struct service_level *ptr, *next; 265 int rc = -ENOENT; 266 267 down_write(&service_level_sem); 268 list_for_each_entry_safe(ptr, next, &service_level_list, list) { 269 if (ptr != slr) 270 continue; 271 list_del(&ptr->list); 272 rc = 0; 273 break; 274 } 275 up_write(&service_level_sem); 276 return rc; 277 } 278 EXPORT_SYMBOL(unregister_service_level); 279 280 static void *service_level_start(struct seq_file *m, loff_t *pos) 281 { 282 down_read(&service_level_sem); 283 return seq_list_start(&service_level_list, *pos); 284 } 285 286 static void *service_level_next(struct seq_file *m, void *p, loff_t *pos) 287 { 288 return seq_list_next(p, &service_level_list, pos); 289 } 290 291 static void service_level_stop(struct seq_file *m, void *p) 292 { 293 up_read(&service_level_sem); 294 } 295 296 static int service_level_show(struct seq_file *m, void *p) 297 { 298 struct service_level *slr; 299 300 slr = list_entry(p, struct service_level, list); 301 slr->seq_print(m, slr); 302 return 0; 303 } 304 305 static const struct seq_operations service_level_seq_ops = { 306 .start = service_level_start, 307 .next = service_level_next, 308 .stop = service_level_stop, 309 .show = service_level_show 310 }; 311 312 static int service_level_open(struct inode *inode, struct file *file) 313 { 314 return seq_open(file, &service_level_seq_ops); 315 } 316 317 static const struct file_operations service_level_ops = { 318 .open = service_level_open, 319 .read = seq_read, 320 .llseek = seq_lseek, 321 .release = seq_release 322 }; 323 324 static void service_level_vm_print(struct seq_file *m, 325 struct service_level *slr) 326 { 327 char *query_buffer, *str; 328 329 query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA); 330 if (!query_buffer) 331 return; 332 cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL); 333 str = strchr(query_buffer, '\n'); 334 if (str) 335 *str = 0; 336 seq_printf(m, "VM: %s\n", query_buffer); 337 kfree(query_buffer); 338 } 339 340 static struct service_level service_level_vm = { 341 .seq_print = service_level_vm_print 342 }; 343 344 static __init int create_proc_service_level(void) 345 { 346 proc_create("service_levels", 0, NULL, &service_level_ops); 347 if (MACHINE_IS_VM) 348 register_service_level(&service_level_vm); 349 return 0; 350 } 351 subsys_initcall(create_proc_service_level); 352 353 /* 354 * Bogomips calculation based on cpu capability. 355 */ 356 int get_cpu_capability(unsigned int *capability) 357 { 358 struct sysinfo_1_2_2 *info; 359 int rc; 360 361 info = (void *) get_zeroed_page(GFP_KERNEL); 362 if (!info) 363 return -ENOMEM; 364 rc = stsi(info, 1, 2, 2); 365 if (rc == -ENOSYS) 366 goto out; 367 rc = 0; 368 *capability = info->capability; 369 out: 370 free_page((unsigned long) info); 371 return rc; 372 } 373 374 /* 375 * CPU capability might have changed. Therefore recalculate loops_per_jiffy. 376 */ 377 void s390_adjust_jiffies(void) 378 { 379 struct sysinfo_1_2_2 *info; 380 const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */ 381 FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR); 382 FP_DECL_EX; 383 unsigned int capability; 384 385 info = (void *) get_zeroed_page(GFP_KERNEL); 386 if (!info) 387 return; 388 389 if (stsi(info, 1, 2, 2) != -ENOSYS) { 390 /* 391 * Major sigh. The cpu capability encoding is "special". 392 * If the first 9 bits of info->capability are 0 then it 393 * is a 32 bit unsigned integer in the range 0 .. 2^23. 394 * If the first 9 bits are != 0 then it is a 32 bit float. 395 * In addition a lower value indicates a proportionally 396 * higher cpu capacity. Bogomips are the other way round. 397 * To get to a halfway suitable number we divide 1e7 398 * by the cpu capability number. Yes, that means a floating 399 * point division .. math-emu here we come :-) 400 */ 401 FP_UNPACK_SP(SA, &fmil); 402 if ((info->capability >> 23) == 0) 403 FP_FROM_INT_S(SB, info->capability, 32, int); 404 else 405 FP_UNPACK_SP(SB, &info->capability); 406 FP_DIV_S(SR, SA, SB); 407 FP_TO_INT_S(capability, SR, 32, 0); 408 } else 409 /* 410 * Really old machine without stsi block for basic 411 * cpu information. Report 42.0 bogomips. 412 */ 413 capability = 42; 414 loops_per_jiffy = capability * (500000/HZ); 415 free_page((unsigned long) info); 416 } 417 418 /* 419 * calibrate the delay loop 420 */ 421 void __cpuinit calibrate_delay(void) 422 { 423 s390_adjust_jiffies(); 424 /* Print the good old Bogomips line .. */ 425 printk(KERN_DEBUG "Calibrating delay loop (skipped)... " 426 "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ), 427 (loops_per_jiffy/(5000/HZ)) % 100); 428 } 429