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/iseries/hv_lp_config.h> 30#include <asm/lppaca.h> 31#include <asm/hvcall.h> 32#include <asm/firmware.h> 33#include <asm/rtas.h> 34#include <asm/system.h> 35#include <asm/time.h> 36#include <asm/prom.h> 37#include <asm/vdso_datapage.h> 38#include <asm/vio.h> 39#include <asm/mmu.h> 40 41#define MODULE_VERS "1.9" 42#define MODULE_NAME "lparcfg" 43 44/* #define LPARCFG_DEBUG */ 45 46static struct proc_dir_entry *proc_ppc64_lparcfg; 47 48/* 49 * Track sum of all purrs across all processors. This is used to further 50 * calculate usage values by different applications 51 */ 52static unsigned long get_purr(void) 53{ 54 unsigned long sum_purr = 0; 55 int cpu; 56 57 for_each_possible_cpu(cpu) { 58 if (firmware_has_feature(FW_FEATURE_ISERIES)) 59 sum_purr += lppaca[cpu].emulated_time_base; 60 else { 61 struct cpu_usage *cu; 62 63 cu = &per_cpu(cpu_usage_array, cpu); 64 sum_purr += cu->current_tb; 65 } 66 } 67 return sum_purr; 68} 69 70#ifdef CONFIG_PPC_ISERIES 71 72/* 73 * Methods used to fetch LPAR data when running on an iSeries platform. 74 */ 75static int iseries_lparcfg_data(struct seq_file *m, void *v) 76{ 77 unsigned long pool_id; 78 int shared, entitled_capacity, max_entitled_capacity; 79 int processors, max_processors; 80 unsigned long purr = get_purr(); 81 82 shared = (int)(local_paca->lppaca_ptr->shared_proc); 83 84 seq_printf(m, "system_active_processors=%d\n", 85 (int)HvLpConfig_getSystemPhysicalProcessors()); 86 87 seq_printf(m, "system_potential_processors=%d\n", 88 (int)HvLpConfig_getSystemPhysicalProcessors()); 89 90 processors = (int)HvLpConfig_getPhysicalProcessors(); 91 seq_printf(m, "partition_active_processors=%d\n", processors); 92 93 max_processors = (int)HvLpConfig_getMaxPhysicalProcessors(); 94 seq_printf(m, "partition_potential_processors=%d\n", max_processors); 95 96 if (shared) { 97 entitled_capacity = HvLpConfig_getSharedProcUnits(); 98 max_entitled_capacity = HvLpConfig_getMaxSharedProcUnits(); 99 } else { 100 entitled_capacity = processors * 100; 101 max_entitled_capacity = max_processors * 100; 102 } 103 seq_printf(m, "partition_entitled_capacity=%d\n", entitled_capacity); 104 105 seq_printf(m, "partition_max_entitled_capacity=%d\n", 106 max_entitled_capacity); 107 108 if (shared) { 109 pool_id = HvLpConfig_getSharedPoolIndex(); 110 seq_printf(m, "pool=%d\n", (int)pool_id); 111 seq_printf(m, "pool_capacity=%d\n", 112 (int)(HvLpConfig_getNumProcsInSharedPool(pool_id) * 113 100)); 114 seq_printf(m, "purr=%ld\n", purr); 115 } 116 117 seq_printf(m, "shared_processor_mode=%d\n", shared); 118 119 return 0; 120} 121 122#else /* CONFIG_PPC_ISERIES */ 123 124static int iseries_lparcfg_data(struct seq_file *m, void *v) 125{ 126 return 0; 127} 128 129#endif /* CONFIG_PPC_ISERIES */ 130 131#ifdef CONFIG_PPC_PSERIES 132/* 133 * Methods used to fetch LPAR data when running on a pSeries platform. 134 */ 135/** 136 * h_get_mpp 137 * H_GET_MPP hcall returns info in 7 parms 138 */ 139int h_get_mpp(struct hvcall_mpp_data *mpp_data) 140{ 141 int rc; 142 unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; 143 144 rc = plpar_hcall9(H_GET_MPP, retbuf); 145 146 mpp_data->entitled_mem = retbuf[0]; 147 mpp_data->mapped_mem = retbuf[1]; 148 149 mpp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff; 150 mpp_data->pool_num = retbuf[2] & 0xffff; 151 152 mpp_data->mem_weight = (retbuf[3] >> 7 * 8) & 0xff; 153 mpp_data->unallocated_mem_weight = (retbuf[3] >> 6 * 8) & 0xff; 154 mpp_data->unallocated_entitlement = retbuf[3] & 0xffffffffffff; 155 156 mpp_data->pool_size = retbuf[4]; 157 mpp_data->loan_request = retbuf[5]; 158 mpp_data->backing_mem = retbuf[6]; 159 160 return rc; 161} 162EXPORT_SYMBOL(h_get_mpp); 163 164struct hvcall_ppp_data { 165 u64 entitlement; 166 u64 unallocated_entitlement; 167 u16 group_num; 168 u16 pool_num; 169 u8 capped; 170 u8 weight; 171 u8 unallocated_weight; 172 u16 active_procs_in_pool; 173 u16 active_system_procs; 174 u16 phys_platform_procs; 175 u32 max_proc_cap_avail; 176 u32 entitled_proc_cap_avail; 177}; 178 179static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data) 180{ 181 unsigned long rc; 182 unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; 183 184 rc = plpar_hcall9(H_GET_PPP, retbuf); 185 186 ppp_data->entitlement = retbuf[0]; 187 ppp_data->unallocated_entitlement = retbuf[1]; 188 189 ppp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff; 190 ppp_data->pool_num = retbuf[2] & 0xffff; 191 192 ppp_data->capped = (retbuf[3] >> 6 * 8) & 0x01; 193 ppp_data->weight = (retbuf[3] >> 5 * 8) & 0xff; 194 ppp_data->unallocated_weight = (retbuf[3] >> 4 * 8) & 0xff; 195 ppp_data->active_procs_in_pool = (retbuf[3] >> 2 * 8) & 0xffff; 196 ppp_data->active_system_procs = retbuf[3] & 0xffff; 197 198 ppp_data->phys_platform_procs = retbuf[4] >> 6 * 8; 199 ppp_data->max_proc_cap_avail = (retbuf[4] >> 3 * 8) & 0xffffff; 200 ppp_data->entitled_proc_cap_avail = retbuf[4] & 0xffffff; 201 202 return rc; 203} 204 205static unsigned h_pic(unsigned long *pool_idle_time, 206 unsigned long *num_procs) 207{ 208 unsigned long rc; 209 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 210 211 rc = plpar_hcall(H_PIC, retbuf); 212 213 *pool_idle_time = retbuf[0]; 214 *num_procs = retbuf[1]; 215 216 return rc; 217} 218 219/* 220 * parse_ppp_data 221 * Parse out the data returned from h_get_ppp and h_pic 222 */ 223static void parse_ppp_data(struct seq_file *m) 224{ 225 struct hvcall_ppp_data ppp_data; 226 struct device_node *root; 227 const int *perf_level; 228 int rc; 229 230 rc = h_get_ppp(&ppp_data); 231 if (rc) 232 return; 233 234 seq_printf(m, "partition_entitled_capacity=%lld\n", 235 ppp_data.entitlement); 236 seq_printf(m, "group=%d\n", ppp_data.group_num); 237 seq_printf(m, "system_active_processors=%d\n", 238 ppp_data.active_system_procs); 239 240 /* pool related entries are apropriate for shared configs */ 241 if (lppaca[0].shared_proc) { 242 unsigned long pool_idle_time, pool_procs; 243 244 seq_printf(m, "pool=%d\n", ppp_data.pool_num); 245 246 /* report pool_capacity in percentage */ 247 seq_printf(m, "pool_capacity=%d\n", 248 ppp_data.active_procs_in_pool * 100); 249 250 h_pic(&pool_idle_time, &pool_procs); 251 seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time); 252 seq_printf(m, "pool_num_procs=%ld\n", pool_procs); 253 } 254 255 seq_printf(m, "unallocated_capacity_weight=%d\n", 256 ppp_data.unallocated_weight); 257 seq_printf(m, "capacity_weight=%d\n", ppp_data.weight); 258 seq_printf(m, "capped=%d\n", ppp_data.capped); 259 seq_printf(m, "unallocated_capacity=%lld\n", 260 ppp_data.unallocated_entitlement); 261 262 /* The last bits of information returned from h_get_ppp are only 263 * valid if the ibm,partition-performance-parameters-level 264 * property is >= 1. 265 */ 266 root = of_find_node_by_path("/"); 267 if (root) { 268 perf_level = of_get_property(root, 269 "ibm,partition-performance-parameters-level", 270 NULL); 271 if (perf_level && (*perf_level >= 1)) { 272 seq_printf(m, 273 "physical_procs_allocated_to_virtualization=%d\n", 274 ppp_data.phys_platform_procs); 275 seq_printf(m, "max_proc_capacity_available=%d\n", 276 ppp_data.max_proc_cap_avail); 277 seq_printf(m, "entitled_proc_capacity_available=%d\n", 278 ppp_data.entitled_proc_cap_avail); 279 } 280 281 of_node_put(root); 282 } 283} 284 285/** 286 * parse_mpp_data 287 * Parse out data returned from h_get_mpp 288 */ 289static void parse_mpp_data(struct seq_file *m) 290{ 291 struct hvcall_mpp_data mpp_data; 292 int rc; 293 294 rc = h_get_mpp(&mpp_data); 295 if (rc) 296 return; 297 298 seq_printf(m, "entitled_memory=%ld\n", mpp_data.entitled_mem); 299 300 if (mpp_data.mapped_mem != -1) 301 seq_printf(m, "mapped_entitled_memory=%ld\n", 302 mpp_data.mapped_mem); 303 304 seq_printf(m, "entitled_memory_group_number=%d\n", mpp_data.group_num); 305 seq_printf(m, "entitled_memory_pool_number=%d\n", mpp_data.pool_num); 306 307 seq_printf(m, "entitled_memory_weight=%d\n", mpp_data.mem_weight); 308 seq_printf(m, "unallocated_entitled_memory_weight=%d\n", 309 mpp_data.unallocated_mem_weight); 310 seq_printf(m, "unallocated_io_mapping_entitlement=%ld\n", 311 mpp_data.unallocated_entitlement); 312 313 if (mpp_data.pool_size != -1) 314 seq_printf(m, "entitled_memory_pool_size=%ld bytes\n", 315 mpp_data.pool_size); 316 317 seq_printf(m, "entitled_memory_loan_request=%ld\n", 318 mpp_data.loan_request); 319 320 seq_printf(m, "backing_memory=%ld bytes\n", mpp_data.backing_mem); 321} 322 323#define SPLPAR_CHARACTERISTICS_TOKEN 20 324#define SPLPAR_MAXLENGTH 1026*(sizeof(char)) 325 326/* 327 * parse_system_parameter_string() 328 * Retrieve the potential_processors, max_entitled_capacity and friends 329 * through the get-system-parameter rtas call. Replace keyword strings as 330 * necessary. 331 */ 332static void parse_system_parameter_string(struct seq_file *m) 333{ 334 int call_status; 335 336 unsigned char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL); 337 if (!local_buffer) { 338 printk(KERN_ERR "%s %s kmalloc failure at line %d\n", 339 __FILE__, __func__, __LINE__); 340 return; 341 } 342 343 spin_lock(&rtas_data_buf_lock); 344 memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH); 345 call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1, 346 NULL, 347 SPLPAR_CHARACTERISTICS_TOKEN, 348 __pa(rtas_data_buf), 349 RTAS_DATA_BUF_SIZE); 350 memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH); 351 spin_unlock(&rtas_data_buf_lock); 352 353 if (call_status != 0) { 354 printk(KERN_INFO 355 "%s %s Error calling get-system-parameter (0x%x)\n", 356 __FILE__, __func__, call_status); 357 } else { 358 int splpar_strlen; 359 int idx, w_idx; 360 char *workbuffer = kzalloc(SPLPAR_MAXLENGTH, GFP_KERNEL); 361 if (!workbuffer) { 362 printk(KERN_ERR "%s %s kmalloc failure at line %d\n", 363 __FILE__, __func__, __LINE__); 364 kfree(local_buffer); 365 return; 366 } 367#ifdef LPARCFG_DEBUG 368 printk(KERN_INFO "success calling get-system-parameter\n"); 369#endif 370 splpar_strlen = local_buffer[0] * 256 + local_buffer[1]; 371 local_buffer += 2; /* step over strlen value */ 372 373 w_idx = 0; 374 idx = 0; 375 while ((*local_buffer) && (idx < splpar_strlen)) { 376 workbuffer[w_idx++] = local_buffer[idx++]; 377 if ((local_buffer[idx] == ',') 378 || (local_buffer[idx] == '\0')) { 379 workbuffer[w_idx] = '\0'; 380 if (w_idx) { 381 /* avoid the empty string */ 382 seq_printf(m, "%s\n", workbuffer); 383 } 384 memset(workbuffer, 0, SPLPAR_MAXLENGTH); 385 idx++; /* skip the comma */ 386 w_idx = 0; 387 } else if (local_buffer[idx] == '=') { 388 /* code here to replace workbuffer contents 389 with different keyword strings */ 390 if (0 == strcmp(workbuffer, "MaxEntCap")) { 391 strcpy(workbuffer, 392 "partition_max_entitled_capacity"); 393 w_idx = strlen(workbuffer); 394 } 395 if (0 == strcmp(workbuffer, "MaxPlatProcs")) { 396 strcpy(workbuffer, 397 "system_potential_processors"); 398 w_idx = strlen(workbuffer); 399 } 400 } 401 } 402 kfree(workbuffer); 403 local_buffer -= 2; /* back up over strlen value */ 404 } 405 kfree(local_buffer); 406} 407 408/* Return the number of processors in the system. 409 * This function reads through the device tree and counts 410 * the virtual processors, this does not include threads. 411 */ 412static int lparcfg_count_active_processors(void) 413{ 414 struct device_node *cpus_dn = NULL; 415 int count = 0; 416 417 while ((cpus_dn = of_find_node_by_type(cpus_dn, "cpu"))) { 418#ifdef LPARCFG_DEBUG 419 printk(KERN_ERR "cpus_dn %p\n", cpus_dn); 420#endif 421 count++; 422 } 423 return count; 424} 425 426static void pseries_cmo_data(struct seq_file *m) 427{ 428 int cpu; 429 unsigned long cmo_faults = 0; 430 unsigned long cmo_fault_time = 0; 431 432 seq_printf(m, "cmo_enabled=%d\n", firmware_has_feature(FW_FEATURE_CMO)); 433 434 if (!firmware_has_feature(FW_FEATURE_CMO)) 435 return; 436 437 for_each_possible_cpu(cpu) { 438 cmo_faults += lppaca[cpu].cmo_faults; 439 cmo_fault_time += lppaca[cpu].cmo_fault_time; 440 } 441 442 seq_printf(m, "cmo_faults=%lu\n", cmo_faults); 443 seq_printf(m, "cmo_fault_time_usec=%lu\n", 444 cmo_fault_time / tb_ticks_per_usec); 445 seq_printf(m, "cmo_primary_psp=%d\n", cmo_get_primary_psp()); 446 seq_printf(m, "cmo_secondary_psp=%d\n", cmo_get_secondary_psp()); 447 seq_printf(m, "cmo_page_size=%lu\n", cmo_get_page_size()); 448} 449 450static void splpar_dispatch_data(struct seq_file *m) 451{ 452 int cpu; 453 unsigned long dispatches = 0; 454 unsigned long dispatch_dispersions = 0; 455 456 for_each_possible_cpu(cpu) { 457 dispatches += lppaca[cpu].yield_count; 458 dispatch_dispersions += lppaca[cpu].dispersion_count; 459 } 460 461 seq_printf(m, "dispatches=%lu\n", dispatches); 462 seq_printf(m, "dispatch_dispersions=%lu\n", dispatch_dispersions); 463} 464 465static void parse_em_data(struct seq_file *m) 466{ 467 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 468 469 if (plpar_hcall(H_GET_EM_PARMS, retbuf) == H_SUCCESS) 470 seq_printf(m, "power_mode_data=%016lx\n", retbuf[0]); 471} 472 473static int pseries_lparcfg_data(struct seq_file *m, void *v) 474{ 475 int partition_potential_processors; 476 int partition_active_processors; 477 struct device_node *rtas_node; 478 const int *lrdrp = NULL; 479 480 rtas_node = of_find_node_by_path("/rtas"); 481 if (rtas_node) 482 lrdrp = of_get_property(rtas_node, "ibm,lrdr-capacity", NULL); 483 484 if (lrdrp == NULL) { 485 partition_potential_processors = vdso_data->processorCount; 486 } else { 487 partition_potential_processors = *(lrdrp + 4); 488 } 489 of_node_put(rtas_node); 490 491 partition_active_processors = lparcfg_count_active_processors(); 492 493 if (firmware_has_feature(FW_FEATURE_SPLPAR)) { 494 /* this call handles the ibm,get-system-parameter contents */ 495 parse_system_parameter_string(m); 496 parse_ppp_data(m); 497 parse_mpp_data(m); 498 pseries_cmo_data(m); 499 splpar_dispatch_data(m); 500 501 seq_printf(m, "purr=%ld\n", get_purr()); 502 } else { /* non SPLPAR case */ 503 504 seq_printf(m, "system_active_processors=%d\n", 505 partition_potential_processors); 506 507 seq_printf(m, "system_potential_processors=%d\n", 508 partition_potential_processors); 509 510 seq_printf(m, "partition_max_entitled_capacity=%d\n", 511 partition_potential_processors * 100); 512 513 seq_printf(m, "partition_entitled_capacity=%d\n", 514 partition_active_processors * 100); 515 } 516 517 seq_printf(m, "partition_active_processors=%d\n", 518 partition_active_processors); 519 520 seq_printf(m, "partition_potential_processors=%d\n", 521 partition_potential_processors); 522 523 seq_printf(m, "shared_processor_mode=%d\n", lppaca[0].shared_proc); 524 525 seq_printf(m, "slb_size=%d\n", mmu_slb_size); 526 527 parse_em_data(m); 528 529 return 0; 530} 531 532static ssize_t update_ppp(u64 *entitlement, u8 *weight) 533{ 534 struct hvcall_ppp_data ppp_data; 535 u8 new_weight; 536 u64 new_entitled; 537 ssize_t retval; 538 539 /* Get our current parameters */ 540 retval = h_get_ppp(&ppp_data); 541 if (retval) 542 return retval; 543 544 if (entitlement) { 545 new_weight = ppp_data.weight; 546 new_entitled = *entitlement; 547 } else if (weight) { 548 new_weight = *weight; 549 new_entitled = ppp_data.entitlement; 550 } else 551 return -EINVAL; 552 553 pr_debug("%s: current_entitled = %llu, current_weight = %u\n", 554 __func__, ppp_data.entitlement, ppp_data.weight); 555 556 pr_debug("%s: new_entitled = %llu, new_weight = %u\n", 557 __func__, new_entitled, new_weight); 558 559 retval = plpar_hcall_norets(H_SET_PPP, new_entitled, new_weight); 560 return retval; 561} 562 563/** 564 * update_mpp 565 * 566 * Update the memory entitlement and weight for the partition. Caller must 567 * specify either a new entitlement or weight, not both, to be updated 568 * since the h_set_mpp call takes both entitlement and weight as parameters. 569 */ 570static ssize_t update_mpp(u64 *entitlement, u8 *weight) 571{ 572 struct hvcall_mpp_data mpp_data; 573 u64 new_entitled; 574 u8 new_weight; 575 ssize_t rc; 576 577 if (entitlement) { 578 /* Check with vio to ensure the new memory entitlement 579 * can be handled. 580 */ 581 rc = vio_cmo_entitlement_update(*entitlement); 582 if (rc) 583 return rc; 584 } 585 586 rc = h_get_mpp(&mpp_data); 587 if (rc) 588 return rc; 589 590 if (entitlement) { 591 new_weight = mpp_data.mem_weight; 592 new_entitled = *entitlement; 593 } else if (weight) { 594 new_weight = *weight; 595 new_entitled = mpp_data.entitled_mem; 596 } else 597 return -EINVAL; 598 599 pr_debug("%s: current_entitled = %lu, current_weight = %u\n", 600 __func__, mpp_data.entitled_mem, mpp_data.mem_weight); 601 602 pr_debug("%s: new_entitled = %llu, new_weight = %u\n", 603 __func__, new_entitled, new_weight); 604 605 rc = plpar_hcall_norets(H_SET_MPP, new_entitled, new_weight); 606 return rc; 607} 608 609/* 610 * Interface for changing system parameters (variable capacity weight 611 * and entitled capacity). Format of input is "param_name=value"; 612 * anything after value is ignored. Valid parameters at this time are 613 * "partition_entitled_capacity" and "capacity_weight". We use 614 * H_SET_PPP to alter parameters. 615 * 616 * This function should be invoked only on systems with 617 * FW_FEATURE_SPLPAR. 618 */ 619static ssize_t lparcfg_write(struct file *file, const char __user * buf, 620 size_t count, loff_t * off) 621{ 622 int kbuf_sz = 64; 623 char kbuf[kbuf_sz]; 624 char *tmp; 625 u64 new_entitled, *new_entitled_ptr = &new_entitled; 626 u8 new_weight, *new_weight_ptr = &new_weight; 627 ssize_t retval; 628 629 if (!firmware_has_feature(FW_FEATURE_SPLPAR) || 630 firmware_has_feature(FW_FEATURE_ISERIES)) 631 return -EINVAL; 632 633 if (count > kbuf_sz) 634 return -EINVAL; 635 636 if (copy_from_user(kbuf, buf, count)) 637 return -EFAULT; 638 639 kbuf[count - 1] = '\0'; 640 tmp = strchr(kbuf, '='); 641 if (!tmp) 642 return -EINVAL; 643 644 *tmp++ = '\0'; 645 646 if (!strcmp(kbuf, "partition_entitled_capacity")) { 647 char *endp; 648 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10); 649 if (endp == tmp) 650 return -EINVAL; 651 652 retval = update_ppp(new_entitled_ptr, NULL); 653 } else if (!strcmp(kbuf, "capacity_weight")) { 654 char *endp; 655 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10); 656 if (endp == tmp) 657 return -EINVAL; 658 659 retval = update_ppp(NULL, new_weight_ptr); 660 } else if (!strcmp(kbuf, "entitled_memory")) { 661 char *endp; 662 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10); 663 if (endp == tmp) 664 return -EINVAL; 665 666 retval = update_mpp(new_entitled_ptr, NULL); 667 } else if (!strcmp(kbuf, "entitled_memory_weight")) { 668 char *endp; 669 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10); 670 if (endp == tmp) 671 return -EINVAL; 672 673 retval = update_mpp(NULL, new_weight_ptr); 674 } else 675 return -EINVAL; 676 677 if (retval == H_SUCCESS || retval == H_CONSTRAINED) { 678 retval = count; 679 } else if (retval == H_BUSY) { 680 retval = -EBUSY; 681 } else if (retval == H_HARDWARE) { 682 retval = -EIO; 683 } else if (retval == H_PARAMETER) { 684 retval = -EINVAL; 685 } 686 687 return retval; 688} 689 690#else /* CONFIG_PPC_PSERIES */ 691 692static int pseries_lparcfg_data(struct seq_file *m, void *v) 693{ 694 return 0; 695} 696 697static ssize_t lparcfg_write(struct file *file, const char __user * buf, 698 size_t count, loff_t * off) 699{ 700 return -EINVAL; 701} 702 703#endif /* CONFIG_PPC_PSERIES */ 704 705static int lparcfg_data(struct seq_file *m, void *v) 706{ 707 struct device_node *rootdn; 708 const char *model = ""; 709 const char *system_id = ""; 710 const char *tmp; 711 const unsigned int *lp_index_ptr; 712 unsigned int lp_index = 0; 713 714 seq_printf(m, "%s %s\n", MODULE_NAME, MODULE_VERS); 715 716 rootdn = of_find_node_by_path("/"); 717 if (rootdn) { 718 tmp = of_get_property(rootdn, "model", NULL); 719 if (tmp) { 720 model = tmp; 721 /* Skip "IBM," - see platforms/iseries/dt.c */ 722 if (firmware_has_feature(FW_FEATURE_ISERIES)) 723 model += 4; 724 } 725 tmp = of_get_property(rootdn, "system-id", NULL); 726 if (tmp) { 727 system_id = tmp; 728 /* Skip "IBM," - see platforms/iseries/dt.c */ 729 if (firmware_has_feature(FW_FEATURE_ISERIES)) 730 system_id += 4; 731 } 732 lp_index_ptr = of_get_property(rootdn, "ibm,partition-no", 733 NULL); 734 if (lp_index_ptr) 735 lp_index = *lp_index_ptr; 736 of_node_put(rootdn); 737 } 738 seq_printf(m, "serial_number=%s\n", system_id); 739 seq_printf(m, "system_type=%s\n", model); 740 seq_printf(m, "partition_id=%d\n", (int)lp_index); 741 742 if (firmware_has_feature(FW_FEATURE_ISERIES)) 743 return iseries_lparcfg_data(m, v); 744 return pseries_lparcfg_data(m, v); 745} 746 747static int lparcfg_open(struct inode *inode, struct file *file) 748{ 749 return single_open(file, lparcfg_data, NULL); 750} 751 752static const struct file_operations lparcfg_fops = { 753 .owner = THIS_MODULE, 754 .read = seq_read, 755 .write = lparcfg_write, 756 .open = lparcfg_open, 757 .release = single_release, 758}; 759 760static int __init lparcfg_init(void) 761{ 762 struct proc_dir_entry *ent; 763 mode_t mode = S_IRUSR | S_IRGRP | S_IROTH; 764 765 /* Allow writing if we have FW_FEATURE_SPLPAR */ 766 if (firmware_has_feature(FW_FEATURE_SPLPAR) && 767 !firmware_has_feature(FW_FEATURE_ISERIES)) 768 mode |= S_IWUSR; 769 770 ent = proc_create("powerpc/lparcfg", mode, NULL, &lparcfg_fops); 771 if (!ent) { 772 printk(KERN_ERR "Failed to create powerpc/lparcfg\n"); 773 return -EIO; 774 } 775 776 proc_ppc64_lparcfg = ent; 777 return 0; 778} 779 780static void __exit lparcfg_cleanup(void) 781{ 782 if (proc_ppc64_lparcfg) 783 remove_proc_entry("lparcfg", proc_ppc64_lparcfg->parent); 784} 785 786module_init(lparcfg_init); 787module_exit(lparcfg_cleanup); 788MODULE_DESCRIPTION("Interface for LPAR configuration data"); 789MODULE_AUTHOR("Dave Engebretsen"); 790MODULE_LICENSE("GPL"); 791