1 /* 2 * PowerPC64 LPAR Configuration Information Driver 3 * 4 * Dave Engebretsen engebret@us.ibm.com 5 * Copyright (c) 2003 Dave Engebretsen 6 * Will Schmidt willschm@us.ibm.com 7 * SPLPAR updates, Copyright (c) 2003 Will Schmidt IBM Corporation. 8 * seq_file updates, Copyright (c) 2004 Will Schmidt IBM Corporation. 9 * Nathan Lynch nathanl@austin.ibm.com 10 * Added lparcfg_write, Copyright (C) 2004 Nathan Lynch IBM Corporation. 11 * 12 * This program is free software; you can redistribute it and/or 13 * modify it under the terms of the GNU General Public License 14 * as published by the Free Software Foundation; either version 15 * 2 of the License, or (at your option) any later version. 16 * 17 * This driver creates a proc file at /proc/ppc64/lparcfg which contains 18 * keyword - value pairs that specify the configuration of the partition. 19 */ 20 21 #include <linux/module.h> 22 #include <linux/types.h> 23 #include <linux/errno.h> 24 #include <linux/proc_fs.h> 25 #include <linux/init.h> 26 #include <linux/seq_file.h> 27 #include <linux/slab.h> 28 #include <asm/uaccess.h> 29 #include <asm/lppaca.h> 30 #include <asm/hvcall.h> 31 #include <asm/firmware.h> 32 #include <asm/rtas.h> 33 #include <asm/time.h> 34 #include <asm/prom.h> 35 #include <asm/vdso_datapage.h> 36 #include <asm/vio.h> 37 #include <asm/mmu.h> 38 #include <asm/machdep.h> 39 40 41 /* 42 * This isn't a module but we expose that to userspace 43 * via /proc so leave the definitions here 44 */ 45 #define MODULE_VERS "1.9" 46 #define MODULE_NAME "lparcfg" 47 48 /* #define LPARCFG_DEBUG */ 49 50 /* 51 * Track sum of all purrs across all processors. This is used to further 52 * calculate usage values by different applications 53 */ 54 static unsigned long get_purr(void) 55 { 56 unsigned long sum_purr = 0; 57 int cpu; 58 59 for_each_possible_cpu(cpu) { 60 struct cpu_usage *cu; 61 62 cu = &per_cpu(cpu_usage_array, cpu); 63 sum_purr += cu->current_tb; 64 } 65 return sum_purr; 66 } 67 68 /* 69 * Methods used to fetch LPAR data when running on a pSeries platform. 70 */ 71 72 struct hvcall_ppp_data { 73 u64 entitlement; 74 u64 unallocated_entitlement; 75 u16 group_num; 76 u16 pool_num; 77 u8 capped; 78 u8 weight; 79 u8 unallocated_weight; 80 u16 active_procs_in_pool; 81 u16 active_system_procs; 82 u16 phys_platform_procs; 83 u32 max_proc_cap_avail; 84 u32 entitled_proc_cap_avail; 85 }; 86 87 /* 88 * H_GET_PPP hcall returns info in 4 parms. 89 * entitled_capacity,unallocated_capacity, 90 * aggregation, resource_capability). 91 * 92 * R4 = Entitled Processor Capacity Percentage. 93 * R5 = Unallocated Processor Capacity Percentage. 94 * R6 (AABBCCDDEEFFGGHH). 95 * XXXX - reserved (0) 96 * XXXX - reserved (0) 97 * XXXX - Group Number 98 * XXXX - Pool Number. 99 * R7 (IIJJKKLLMMNNOOPP). 100 * XX - reserved. (0) 101 * XX - bit 0-6 reserved (0). bit 7 is Capped indicator. 102 * XX - variable processor Capacity Weight 103 * XX - Unallocated Variable Processor Capacity Weight. 104 * XXXX - Active processors in Physical Processor Pool. 105 * XXXX - Processors active on platform. 106 * R8 (QQQQRRRRRRSSSSSS). if ibm,partition-performance-parameters-level >= 1 107 * XXXX - Physical platform procs allocated to virtualization. 108 * XXXXXX - Max procs capacity % available to the partitions pool. 109 * XXXXXX - Entitled procs capacity % available to the 110 * partitions pool. 111 */ 112 static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data) 113 { 114 unsigned long rc; 115 unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; 116 117 rc = plpar_hcall9(H_GET_PPP, retbuf); 118 119 ppp_data->entitlement = retbuf[0]; 120 ppp_data->unallocated_entitlement = retbuf[1]; 121 122 ppp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff; 123 ppp_data->pool_num = retbuf[2] & 0xffff; 124 125 ppp_data->capped = (retbuf[3] >> 6 * 8) & 0x01; 126 ppp_data->weight = (retbuf[3] >> 5 * 8) & 0xff; 127 ppp_data->unallocated_weight = (retbuf[3] >> 4 * 8) & 0xff; 128 ppp_data->active_procs_in_pool = (retbuf[3] >> 2 * 8) & 0xffff; 129 ppp_data->active_system_procs = retbuf[3] & 0xffff; 130 131 ppp_data->phys_platform_procs = retbuf[4] >> 6 * 8; 132 ppp_data->max_proc_cap_avail = (retbuf[4] >> 3 * 8) & 0xffffff; 133 ppp_data->entitled_proc_cap_avail = retbuf[4] & 0xffffff; 134 135 return rc; 136 } 137 138 static unsigned h_pic(unsigned long *pool_idle_time, 139 unsigned long *num_procs) 140 { 141 unsigned long rc; 142 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 143 144 rc = plpar_hcall(H_PIC, retbuf); 145 146 *pool_idle_time = retbuf[0]; 147 *num_procs = retbuf[1]; 148 149 return rc; 150 } 151 152 /* 153 * parse_ppp_data 154 * Parse out the data returned from h_get_ppp and h_pic 155 */ 156 static void parse_ppp_data(struct seq_file *m) 157 { 158 struct hvcall_ppp_data ppp_data; 159 struct device_node *root; 160 const __be32 *perf_level; 161 int rc; 162 163 rc = h_get_ppp(&ppp_data); 164 if (rc) 165 return; 166 167 seq_printf(m, "partition_entitled_capacity=%lld\n", 168 ppp_data.entitlement); 169 seq_printf(m, "group=%d\n", ppp_data.group_num); 170 seq_printf(m, "system_active_processors=%d\n", 171 ppp_data.active_system_procs); 172 173 /* pool related entries are appropriate for shared configs */ 174 if (lppaca_shared_proc(get_lppaca())) { 175 unsigned long pool_idle_time, pool_procs; 176 177 seq_printf(m, "pool=%d\n", ppp_data.pool_num); 178 179 /* report pool_capacity in percentage */ 180 seq_printf(m, "pool_capacity=%d\n", 181 ppp_data.active_procs_in_pool * 100); 182 183 h_pic(&pool_idle_time, &pool_procs); 184 seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time); 185 seq_printf(m, "pool_num_procs=%ld\n", pool_procs); 186 } 187 188 seq_printf(m, "unallocated_capacity_weight=%d\n", 189 ppp_data.unallocated_weight); 190 seq_printf(m, "capacity_weight=%d\n", ppp_data.weight); 191 seq_printf(m, "capped=%d\n", ppp_data.capped); 192 seq_printf(m, "unallocated_capacity=%lld\n", 193 ppp_data.unallocated_entitlement); 194 195 /* The last bits of information returned from h_get_ppp are only 196 * valid if the ibm,partition-performance-parameters-level 197 * property is >= 1. 198 */ 199 root = of_find_node_by_path("/"); 200 if (root) { 201 perf_level = of_get_property(root, 202 "ibm,partition-performance-parameters-level", 203 NULL); 204 if (perf_level && (be32_to_cpup(perf_level) >= 1)) { 205 seq_printf(m, 206 "physical_procs_allocated_to_virtualization=%d\n", 207 ppp_data.phys_platform_procs); 208 seq_printf(m, "max_proc_capacity_available=%d\n", 209 ppp_data.max_proc_cap_avail); 210 seq_printf(m, "entitled_proc_capacity_available=%d\n", 211 ppp_data.entitled_proc_cap_avail); 212 } 213 214 of_node_put(root); 215 } 216 } 217 218 /** 219 * parse_mpp_data 220 * Parse out data returned from h_get_mpp 221 */ 222 static void parse_mpp_data(struct seq_file *m) 223 { 224 struct hvcall_mpp_data mpp_data; 225 int rc; 226 227 rc = h_get_mpp(&mpp_data); 228 if (rc) 229 return; 230 231 seq_printf(m, "entitled_memory=%ld\n", mpp_data.entitled_mem); 232 233 if (mpp_data.mapped_mem != -1) 234 seq_printf(m, "mapped_entitled_memory=%ld\n", 235 mpp_data.mapped_mem); 236 237 seq_printf(m, "entitled_memory_group_number=%d\n", mpp_data.group_num); 238 seq_printf(m, "entitled_memory_pool_number=%d\n", mpp_data.pool_num); 239 240 seq_printf(m, "entitled_memory_weight=%d\n", mpp_data.mem_weight); 241 seq_printf(m, "unallocated_entitled_memory_weight=%d\n", 242 mpp_data.unallocated_mem_weight); 243 seq_printf(m, "unallocated_io_mapping_entitlement=%ld\n", 244 mpp_data.unallocated_entitlement); 245 246 if (mpp_data.pool_size != -1) 247 seq_printf(m, "entitled_memory_pool_size=%ld bytes\n", 248 mpp_data.pool_size); 249 250 seq_printf(m, "entitled_memory_loan_request=%ld\n", 251 mpp_data.loan_request); 252 253 seq_printf(m, "backing_memory=%ld bytes\n", mpp_data.backing_mem); 254 } 255 256 /** 257 * parse_mpp_x_data 258 * Parse out data returned from h_get_mpp_x 259 */ 260 static void parse_mpp_x_data(struct seq_file *m) 261 { 262 struct hvcall_mpp_x_data mpp_x_data; 263 264 if (!firmware_has_feature(FW_FEATURE_XCMO)) 265 return; 266 if (h_get_mpp_x(&mpp_x_data)) 267 return; 268 269 seq_printf(m, "coalesced_bytes=%ld\n", mpp_x_data.coalesced_bytes); 270 271 if (mpp_x_data.pool_coalesced_bytes) 272 seq_printf(m, "pool_coalesced_bytes=%ld\n", 273 mpp_x_data.pool_coalesced_bytes); 274 if (mpp_x_data.pool_purr_cycles) 275 seq_printf(m, "coalesce_pool_purr=%ld\n", mpp_x_data.pool_purr_cycles); 276 if (mpp_x_data.pool_spurr_cycles) 277 seq_printf(m, "coalesce_pool_spurr=%ld\n", mpp_x_data.pool_spurr_cycles); 278 } 279 280 #define SPLPAR_CHARACTERISTICS_TOKEN 20 281 #define SPLPAR_MAXLENGTH 1026*(sizeof(char)) 282 283 /* 284 * parse_system_parameter_string() 285 * Retrieve the potential_processors, max_entitled_capacity and friends 286 * through the get-system-parameter rtas call. Replace keyword strings as 287 * necessary. 288 */ 289 static void parse_system_parameter_string(struct seq_file *m) 290 { 291 int call_status; 292 293 unsigned char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL); 294 if (!local_buffer) { 295 printk(KERN_ERR "%s %s kmalloc failure at line %d\n", 296 __FILE__, __func__, __LINE__); 297 return; 298 } 299 300 spin_lock(&rtas_data_buf_lock); 301 memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH); 302 call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1, 303 NULL, 304 SPLPAR_CHARACTERISTICS_TOKEN, 305 __pa(rtas_data_buf), 306 RTAS_DATA_BUF_SIZE); 307 memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH); 308 local_buffer[SPLPAR_MAXLENGTH - 1] = '\0'; 309 spin_unlock(&rtas_data_buf_lock); 310 311 if (call_status != 0) { 312 printk(KERN_INFO 313 "%s %s Error calling get-system-parameter (0x%x)\n", 314 __FILE__, __func__, call_status); 315 } else { 316 int splpar_strlen; 317 int idx, w_idx; 318 char *workbuffer = kzalloc(SPLPAR_MAXLENGTH, GFP_KERNEL); 319 if (!workbuffer) { 320 printk(KERN_ERR "%s %s kmalloc failure at line %d\n", 321 __FILE__, __func__, __LINE__); 322 kfree(local_buffer); 323 return; 324 } 325 #ifdef LPARCFG_DEBUG 326 printk(KERN_INFO "success calling get-system-parameter\n"); 327 #endif 328 splpar_strlen = local_buffer[0] * 256 + local_buffer[1]; 329 local_buffer += 2; /* step over strlen value */ 330 331 w_idx = 0; 332 idx = 0; 333 while ((*local_buffer) && (idx < splpar_strlen)) { 334 workbuffer[w_idx++] = local_buffer[idx++]; 335 if ((local_buffer[idx] == ',') 336 || (local_buffer[idx] == '\0')) { 337 workbuffer[w_idx] = '\0'; 338 if (w_idx) { 339 /* avoid the empty string */ 340 seq_printf(m, "%s\n", workbuffer); 341 } 342 memset(workbuffer, 0, SPLPAR_MAXLENGTH); 343 idx++; /* skip the comma */ 344 w_idx = 0; 345 } else if (local_buffer[idx] == '=') { 346 /* code here to replace workbuffer contents 347 with different keyword strings */ 348 if (0 == strcmp(workbuffer, "MaxEntCap")) { 349 strcpy(workbuffer, 350 "partition_max_entitled_capacity"); 351 w_idx = strlen(workbuffer); 352 } 353 if (0 == strcmp(workbuffer, "MaxPlatProcs")) { 354 strcpy(workbuffer, 355 "system_potential_processors"); 356 w_idx = strlen(workbuffer); 357 } 358 } 359 } 360 kfree(workbuffer); 361 local_buffer -= 2; /* back up over strlen value */ 362 } 363 kfree(local_buffer); 364 } 365 366 /* Return the number of processors in the system. 367 * This function reads through the device tree and counts 368 * the virtual processors, this does not include threads. 369 */ 370 static int lparcfg_count_active_processors(void) 371 { 372 struct device_node *cpus_dn = NULL; 373 int count = 0; 374 375 while ((cpus_dn = of_find_node_by_type(cpus_dn, "cpu"))) { 376 #ifdef LPARCFG_DEBUG 377 printk(KERN_ERR "cpus_dn %p\n", cpus_dn); 378 #endif 379 count++; 380 } 381 return count; 382 } 383 384 static void pseries_cmo_data(struct seq_file *m) 385 { 386 int cpu; 387 unsigned long cmo_faults = 0; 388 unsigned long cmo_fault_time = 0; 389 390 seq_printf(m, "cmo_enabled=%d\n", firmware_has_feature(FW_FEATURE_CMO)); 391 392 if (!firmware_has_feature(FW_FEATURE_CMO)) 393 return; 394 395 for_each_possible_cpu(cpu) { 396 cmo_faults += be64_to_cpu(lppaca_of(cpu).cmo_faults); 397 cmo_fault_time += be64_to_cpu(lppaca_of(cpu).cmo_fault_time); 398 } 399 400 seq_printf(m, "cmo_faults=%lu\n", cmo_faults); 401 seq_printf(m, "cmo_fault_time_usec=%lu\n", 402 cmo_fault_time / tb_ticks_per_usec); 403 seq_printf(m, "cmo_primary_psp=%d\n", cmo_get_primary_psp()); 404 seq_printf(m, "cmo_secondary_psp=%d\n", cmo_get_secondary_psp()); 405 seq_printf(m, "cmo_page_size=%lu\n", cmo_get_page_size()); 406 } 407 408 static void splpar_dispatch_data(struct seq_file *m) 409 { 410 int cpu; 411 unsigned long dispatches = 0; 412 unsigned long dispatch_dispersions = 0; 413 414 for_each_possible_cpu(cpu) { 415 dispatches += be32_to_cpu(lppaca_of(cpu).yield_count); 416 dispatch_dispersions += 417 be32_to_cpu(lppaca_of(cpu).dispersion_count); 418 } 419 420 seq_printf(m, "dispatches=%lu\n", dispatches); 421 seq_printf(m, "dispatch_dispersions=%lu\n", dispatch_dispersions); 422 } 423 424 static void parse_em_data(struct seq_file *m) 425 { 426 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 427 428 if (firmware_has_feature(FW_FEATURE_LPAR) && 429 plpar_hcall(H_GET_EM_PARMS, retbuf) == H_SUCCESS) 430 seq_printf(m, "power_mode_data=%016lx\n", retbuf[0]); 431 } 432 433 static int pseries_lparcfg_data(struct seq_file *m, void *v) 434 { 435 int partition_potential_processors; 436 int partition_active_processors; 437 struct device_node *rtas_node; 438 const __be32 *lrdrp = NULL; 439 440 rtas_node = of_find_node_by_path("/rtas"); 441 if (rtas_node) 442 lrdrp = of_get_property(rtas_node, "ibm,lrdr-capacity", NULL); 443 444 if (lrdrp == NULL) { 445 partition_potential_processors = vdso_data->processorCount; 446 } else { 447 partition_potential_processors = be32_to_cpup(lrdrp + 4); 448 } 449 of_node_put(rtas_node); 450 451 partition_active_processors = lparcfg_count_active_processors(); 452 453 if (firmware_has_feature(FW_FEATURE_SPLPAR)) { 454 /* this call handles the ibm,get-system-parameter contents */ 455 parse_system_parameter_string(m); 456 parse_ppp_data(m); 457 parse_mpp_data(m); 458 parse_mpp_x_data(m); 459 pseries_cmo_data(m); 460 splpar_dispatch_data(m); 461 462 seq_printf(m, "purr=%ld\n", get_purr()); 463 } else { /* non SPLPAR case */ 464 465 seq_printf(m, "system_active_processors=%d\n", 466 partition_potential_processors); 467 468 seq_printf(m, "system_potential_processors=%d\n", 469 partition_potential_processors); 470 471 seq_printf(m, "partition_max_entitled_capacity=%d\n", 472 partition_potential_processors * 100); 473 474 seq_printf(m, "partition_entitled_capacity=%d\n", 475 partition_active_processors * 100); 476 } 477 478 seq_printf(m, "partition_active_processors=%d\n", 479 partition_active_processors); 480 481 seq_printf(m, "partition_potential_processors=%d\n", 482 partition_potential_processors); 483 484 seq_printf(m, "shared_processor_mode=%d\n", 485 lppaca_shared_proc(get_lppaca())); 486 487 #ifdef CONFIG_PPC_STD_MMU_64 488 seq_printf(m, "slb_size=%d\n", mmu_slb_size); 489 #endif 490 parse_em_data(m); 491 492 return 0; 493 } 494 495 static ssize_t update_ppp(u64 *entitlement, u8 *weight) 496 { 497 struct hvcall_ppp_data ppp_data; 498 u8 new_weight; 499 u64 new_entitled; 500 ssize_t retval; 501 502 /* Get our current parameters */ 503 retval = h_get_ppp(&ppp_data); 504 if (retval) 505 return retval; 506 507 if (entitlement) { 508 new_weight = ppp_data.weight; 509 new_entitled = *entitlement; 510 } else if (weight) { 511 new_weight = *weight; 512 new_entitled = ppp_data.entitlement; 513 } else 514 return -EINVAL; 515 516 pr_debug("%s: current_entitled = %llu, current_weight = %u\n", 517 __func__, ppp_data.entitlement, ppp_data.weight); 518 519 pr_debug("%s: new_entitled = %llu, new_weight = %u\n", 520 __func__, new_entitled, new_weight); 521 522 retval = plpar_hcall_norets(H_SET_PPP, new_entitled, new_weight); 523 return retval; 524 } 525 526 /** 527 * update_mpp 528 * 529 * Update the memory entitlement and weight for the partition. Caller must 530 * specify either a new entitlement or weight, not both, to be updated 531 * since the h_set_mpp call takes both entitlement and weight as parameters. 532 */ 533 static ssize_t update_mpp(u64 *entitlement, u8 *weight) 534 { 535 struct hvcall_mpp_data mpp_data; 536 u64 new_entitled; 537 u8 new_weight; 538 ssize_t rc; 539 540 if (entitlement) { 541 /* Check with vio to ensure the new memory entitlement 542 * can be handled. 543 */ 544 rc = vio_cmo_entitlement_update(*entitlement); 545 if (rc) 546 return rc; 547 } 548 549 rc = h_get_mpp(&mpp_data); 550 if (rc) 551 return rc; 552 553 if (entitlement) { 554 new_weight = mpp_data.mem_weight; 555 new_entitled = *entitlement; 556 } else if (weight) { 557 new_weight = *weight; 558 new_entitled = mpp_data.entitled_mem; 559 } else 560 return -EINVAL; 561 562 pr_debug("%s: current_entitled = %lu, current_weight = %u\n", 563 __func__, mpp_data.entitled_mem, mpp_data.mem_weight); 564 565 pr_debug("%s: new_entitled = %llu, new_weight = %u\n", 566 __func__, new_entitled, new_weight); 567 568 rc = plpar_hcall_norets(H_SET_MPP, new_entitled, new_weight); 569 return rc; 570 } 571 572 /* 573 * Interface for changing system parameters (variable capacity weight 574 * and entitled capacity). Format of input is "param_name=value"; 575 * anything after value is ignored. Valid parameters at this time are 576 * "partition_entitled_capacity" and "capacity_weight". We use 577 * H_SET_PPP to alter parameters. 578 * 579 * This function should be invoked only on systems with 580 * FW_FEATURE_SPLPAR. 581 */ 582 static ssize_t lparcfg_write(struct file *file, const char __user * buf, 583 size_t count, loff_t * off) 584 { 585 int kbuf_sz = 64; 586 char kbuf[kbuf_sz]; 587 char *tmp; 588 u64 new_entitled, *new_entitled_ptr = &new_entitled; 589 u8 new_weight, *new_weight_ptr = &new_weight; 590 ssize_t retval; 591 592 if (!firmware_has_feature(FW_FEATURE_SPLPAR)) 593 return -EINVAL; 594 595 if (count > kbuf_sz) 596 return -EINVAL; 597 598 if (copy_from_user(kbuf, buf, count)) 599 return -EFAULT; 600 601 kbuf[count - 1] = '\0'; 602 tmp = strchr(kbuf, '='); 603 if (!tmp) 604 return -EINVAL; 605 606 *tmp++ = '\0'; 607 608 if (!strcmp(kbuf, "partition_entitled_capacity")) { 609 char *endp; 610 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10); 611 if (endp == tmp) 612 return -EINVAL; 613 614 retval = update_ppp(new_entitled_ptr, NULL); 615 } else if (!strcmp(kbuf, "capacity_weight")) { 616 char *endp; 617 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10); 618 if (endp == tmp) 619 return -EINVAL; 620 621 retval = update_ppp(NULL, new_weight_ptr); 622 } else if (!strcmp(kbuf, "entitled_memory")) { 623 char *endp; 624 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10); 625 if (endp == tmp) 626 return -EINVAL; 627 628 retval = update_mpp(new_entitled_ptr, NULL); 629 } else if (!strcmp(kbuf, "entitled_memory_weight")) { 630 char *endp; 631 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10); 632 if (endp == tmp) 633 return -EINVAL; 634 635 retval = update_mpp(NULL, new_weight_ptr); 636 } else 637 return -EINVAL; 638 639 if (retval == H_SUCCESS || retval == H_CONSTRAINED) { 640 retval = count; 641 } else if (retval == H_BUSY) { 642 retval = -EBUSY; 643 } else if (retval == H_HARDWARE) { 644 retval = -EIO; 645 } else if (retval == H_PARAMETER) { 646 retval = -EINVAL; 647 } 648 649 return retval; 650 } 651 652 static int lparcfg_data(struct seq_file *m, void *v) 653 { 654 struct device_node *rootdn; 655 const char *model = ""; 656 const char *system_id = ""; 657 const char *tmp; 658 const __be32 *lp_index_ptr; 659 unsigned int lp_index = 0; 660 661 seq_printf(m, "%s %s\n", MODULE_NAME, MODULE_VERS); 662 663 rootdn = of_find_node_by_path("/"); 664 if (rootdn) { 665 tmp = of_get_property(rootdn, "model", NULL); 666 if (tmp) 667 model = tmp; 668 tmp = of_get_property(rootdn, "system-id", NULL); 669 if (tmp) 670 system_id = tmp; 671 lp_index_ptr = of_get_property(rootdn, "ibm,partition-no", 672 NULL); 673 if (lp_index_ptr) 674 lp_index = be32_to_cpup(lp_index_ptr); 675 of_node_put(rootdn); 676 } 677 seq_printf(m, "serial_number=%s\n", system_id); 678 seq_printf(m, "system_type=%s\n", model); 679 seq_printf(m, "partition_id=%d\n", (int)lp_index); 680 681 return pseries_lparcfg_data(m, v); 682 } 683 684 static int lparcfg_open(struct inode *inode, struct file *file) 685 { 686 return single_open(file, lparcfg_data, NULL); 687 } 688 689 static const struct file_operations lparcfg_fops = { 690 .read = seq_read, 691 .write = lparcfg_write, 692 .open = lparcfg_open, 693 .release = single_release, 694 .llseek = seq_lseek, 695 }; 696 697 static int __init lparcfg_init(void) 698 { 699 umode_t mode = S_IRUSR | S_IRGRP | S_IROTH; 700 701 /* Allow writing if we have FW_FEATURE_SPLPAR */ 702 if (firmware_has_feature(FW_FEATURE_SPLPAR)) 703 mode |= S_IWUSR; 704 705 if (!proc_create("powerpc/lparcfg", mode, NULL, &lparcfg_fops)) { 706 printk(KERN_ERR "Failed to create powerpc/lparcfg\n"); 707 return -EIO; 708 } 709 return 0; 710 } 711 machine_device_initcall(pseries, lparcfg_init); 712