1 /* 2 * 64-bit pSeries and RS/6000 setup code. 3 * 4 * Copyright (C) 1995 Linus Torvalds 5 * Adapted from 'alpha' version by Gary Thomas 6 * Modified by Cort Dougan (cort@cs.nmt.edu) 7 * Modified by PPC64 Team, IBM Corp 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License 11 * as published by the Free Software Foundation; either version 12 * 2 of the License, or (at your option) any later version. 13 */ 14 15 /* 16 * bootup setup stuff.. 17 */ 18 19 #include <linux/cpu.h> 20 #include <linux/errno.h> 21 #include <linux/sched.h> 22 #include <linux/kernel.h> 23 #include <linux/mm.h> 24 #include <linux/stddef.h> 25 #include <linux/unistd.h> 26 #include <linux/user.h> 27 #include <linux/tty.h> 28 #include <linux/major.h> 29 #include <linux/interrupt.h> 30 #include <linux/reboot.h> 31 #include <linux/init.h> 32 #include <linux/ioport.h> 33 #include <linux/console.h> 34 #include <linux/pci.h> 35 #include <linux/utsname.h> 36 #include <linux/adb.h> 37 #include <linux/export.h> 38 #include <linux/delay.h> 39 #include <linux/irq.h> 40 #include <linux/seq_file.h> 41 #include <linux/root_dev.h> 42 #include <linux/of.h> 43 #include <linux/of_pci.h> 44 45 #include <asm/mmu.h> 46 #include <asm/processor.h> 47 #include <asm/io.h> 48 #include <asm/pgtable.h> 49 #include <asm/prom.h> 50 #include <asm/rtas.h> 51 #include <asm/pci-bridge.h> 52 #include <asm/iommu.h> 53 #include <asm/dma.h> 54 #include <asm/machdep.h> 55 #include <asm/irq.h> 56 #include <asm/time.h> 57 #include <asm/nvram.h> 58 #include <asm/pmc.h> 59 #include <asm/xics.h> 60 #include <asm/xive.h> 61 #include <asm/ppc-pci.h> 62 #include <asm/i8259.h> 63 #include <asm/udbg.h> 64 #include <asm/smp.h> 65 #include <asm/firmware.h> 66 #include <asm/eeh.h> 67 #include <asm/reg.h> 68 #include <asm/plpar_wrappers.h> 69 #include <asm/kexec.h> 70 #include <asm/isa-bridge.h> 71 #include <asm/security_features.h> 72 73 #include "pseries.h" 74 75 int CMO_PrPSP = -1; 76 int CMO_SecPSP = -1; 77 unsigned long CMO_PageSize = (ASM_CONST(1) << IOMMU_PAGE_SHIFT_4K); 78 EXPORT_SYMBOL(CMO_PageSize); 79 80 int fwnmi_active; /* TRUE if an FWNMI handler is present */ 81 82 static void pSeries_show_cpuinfo(struct seq_file *m) 83 { 84 struct device_node *root; 85 const char *model = ""; 86 87 root = of_find_node_by_path("/"); 88 if (root) 89 model = of_get_property(root, "model", NULL); 90 seq_printf(m, "machine\t\t: CHRP %s\n", model); 91 of_node_put(root); 92 if (radix_enabled()) 93 seq_printf(m, "MMU\t\t: Radix\n"); 94 else 95 seq_printf(m, "MMU\t\t: Hash\n"); 96 } 97 98 /* Initialize firmware assisted non-maskable interrupts if 99 * the firmware supports this feature. 100 */ 101 static void __init fwnmi_init(void) 102 { 103 unsigned long system_reset_addr, machine_check_addr; 104 105 int ibm_nmi_register = rtas_token("ibm,nmi-register"); 106 if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE) 107 return; 108 109 /* If the kernel's not linked at zero we point the firmware at low 110 * addresses anyway, and use a trampoline to get to the real code. */ 111 system_reset_addr = __pa(system_reset_fwnmi) - PHYSICAL_START; 112 machine_check_addr = __pa(machine_check_fwnmi) - PHYSICAL_START; 113 114 if (0 == rtas_call(ibm_nmi_register, 2, 1, NULL, system_reset_addr, 115 machine_check_addr)) 116 fwnmi_active = 1; 117 } 118 119 static void pseries_8259_cascade(struct irq_desc *desc) 120 { 121 struct irq_chip *chip = irq_desc_get_chip(desc); 122 unsigned int cascade_irq = i8259_irq(); 123 124 if (cascade_irq) 125 generic_handle_irq(cascade_irq); 126 127 chip->irq_eoi(&desc->irq_data); 128 } 129 130 static void __init pseries_setup_i8259_cascade(void) 131 { 132 struct device_node *np, *old, *found = NULL; 133 unsigned int cascade; 134 const u32 *addrp; 135 unsigned long intack = 0; 136 int naddr; 137 138 for_each_node_by_type(np, "interrupt-controller") { 139 if (of_device_is_compatible(np, "chrp,iic")) { 140 found = np; 141 break; 142 } 143 } 144 145 if (found == NULL) { 146 printk(KERN_DEBUG "pic: no ISA interrupt controller\n"); 147 return; 148 } 149 150 cascade = irq_of_parse_and_map(found, 0); 151 if (!cascade) { 152 printk(KERN_ERR "pic: failed to map cascade interrupt"); 153 return; 154 } 155 pr_debug("pic: cascade mapped to irq %d\n", cascade); 156 157 for (old = of_node_get(found); old != NULL ; old = np) { 158 np = of_get_parent(old); 159 of_node_put(old); 160 if (np == NULL) 161 break; 162 if (strcmp(np->name, "pci") != 0) 163 continue; 164 addrp = of_get_property(np, "8259-interrupt-acknowledge", NULL); 165 if (addrp == NULL) 166 continue; 167 naddr = of_n_addr_cells(np); 168 intack = addrp[naddr-1]; 169 if (naddr > 1) 170 intack |= ((unsigned long)addrp[naddr-2]) << 32; 171 } 172 if (intack) 173 printk(KERN_DEBUG "pic: PCI 8259 intack at 0x%016lx\n", intack); 174 i8259_init(found, intack); 175 of_node_put(found); 176 irq_set_chained_handler(cascade, pseries_8259_cascade); 177 } 178 179 static void __init pseries_init_irq(void) 180 { 181 /* Try using a XIVE if available, otherwise use a XICS */ 182 if (!xive_spapr_init()) { 183 xics_init(); 184 pseries_setup_i8259_cascade(); 185 } 186 } 187 188 static void pseries_lpar_enable_pmcs(void) 189 { 190 unsigned long set, reset; 191 192 set = 1UL << 63; 193 reset = 0; 194 plpar_hcall_norets(H_PERFMON, set, reset); 195 } 196 197 static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *data) 198 { 199 struct of_reconfig_data *rd = data; 200 struct device_node *parent, *np = rd->dn; 201 struct pci_dn *pdn; 202 int err = NOTIFY_OK; 203 204 switch (action) { 205 case OF_RECONFIG_ATTACH_NODE: 206 parent = of_get_parent(np); 207 pdn = parent ? PCI_DN(parent) : NULL; 208 if (pdn) 209 pci_add_device_node_info(pdn->phb, np); 210 211 of_node_put(parent); 212 break; 213 case OF_RECONFIG_DETACH_NODE: 214 pdn = PCI_DN(np); 215 if (pdn) 216 list_del(&pdn->list); 217 break; 218 default: 219 err = NOTIFY_DONE; 220 break; 221 } 222 return err; 223 } 224 225 static struct notifier_block pci_dn_reconfig_nb = { 226 .notifier_call = pci_dn_reconfig_notifier, 227 }; 228 229 struct kmem_cache *dtl_cache; 230 231 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 232 /* 233 * Allocate space for the dispatch trace log for all possible cpus 234 * and register the buffers with the hypervisor. This is used for 235 * computing time stolen by the hypervisor. 236 */ 237 static int alloc_dispatch_logs(void) 238 { 239 int cpu, ret; 240 struct paca_struct *pp; 241 struct dtl_entry *dtl; 242 243 if (!firmware_has_feature(FW_FEATURE_SPLPAR)) 244 return 0; 245 246 if (!dtl_cache) 247 return 0; 248 249 for_each_possible_cpu(cpu) { 250 pp = paca_ptrs[cpu]; 251 dtl = kmem_cache_alloc(dtl_cache, GFP_KERNEL); 252 if (!dtl) { 253 pr_warn("Failed to allocate dispatch trace log for cpu %d\n", 254 cpu); 255 pr_warn("Stolen time statistics will be unreliable\n"); 256 break; 257 } 258 259 pp->dtl_ridx = 0; 260 pp->dispatch_log = dtl; 261 pp->dispatch_log_end = dtl + N_DISPATCH_LOG; 262 pp->dtl_curr = dtl; 263 } 264 265 /* Register the DTL for the current (boot) cpu */ 266 dtl = get_paca()->dispatch_log; 267 get_paca()->dtl_ridx = 0; 268 get_paca()->dtl_curr = dtl; 269 get_paca()->lppaca_ptr->dtl_idx = 0; 270 271 /* hypervisor reads buffer length from this field */ 272 dtl->enqueue_to_dispatch_time = cpu_to_be32(DISPATCH_LOG_BYTES); 273 ret = register_dtl(hard_smp_processor_id(), __pa(dtl)); 274 if (ret) 275 pr_err("WARNING: DTL registration of cpu %d (hw %d) failed " 276 "with %d\n", smp_processor_id(), 277 hard_smp_processor_id(), ret); 278 get_paca()->lppaca_ptr->dtl_enable_mask = 2; 279 280 return 0; 281 } 282 #else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ 283 static inline int alloc_dispatch_logs(void) 284 { 285 return 0; 286 } 287 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ 288 289 static int alloc_dispatch_log_kmem_cache(void) 290 { 291 dtl_cache = kmem_cache_create("dtl", DISPATCH_LOG_BYTES, 292 DISPATCH_LOG_BYTES, 0, NULL); 293 if (!dtl_cache) { 294 pr_warn("Failed to create dispatch trace log buffer cache\n"); 295 pr_warn("Stolen time statistics will be unreliable\n"); 296 return 0; 297 } 298 299 return alloc_dispatch_logs(); 300 } 301 machine_early_initcall(pseries, alloc_dispatch_log_kmem_cache); 302 303 static void pseries_lpar_idle(void) 304 { 305 /* 306 * Default handler to go into low thread priority and possibly 307 * low power mode by ceding processor to hypervisor 308 */ 309 310 /* Indicate to hypervisor that we are idle. */ 311 get_lppaca()->idle = 1; 312 313 /* 314 * Yield the processor to the hypervisor. We return if 315 * an external interrupt occurs (which are driven prior 316 * to returning here) or if a prod occurs from another 317 * processor. When returning here, external interrupts 318 * are enabled. 319 */ 320 cede_processor(); 321 322 get_lppaca()->idle = 0; 323 } 324 325 /* 326 * Enable relocation on during exceptions. This has partition wide scope and 327 * may take a while to complete, if it takes longer than one second we will 328 * just give up rather than wasting any more time on this - if that turns out 329 * to ever be a problem in practice we can move this into a kernel thread to 330 * finish off the process later in boot. 331 */ 332 void pseries_enable_reloc_on_exc(void) 333 { 334 long rc; 335 unsigned int delay, total_delay = 0; 336 337 while (1) { 338 rc = enable_reloc_on_exceptions(); 339 if (!H_IS_LONG_BUSY(rc)) { 340 if (rc == H_P2) { 341 pr_info("Relocation on exceptions not" 342 " supported\n"); 343 } else if (rc != H_SUCCESS) { 344 pr_warn("Unable to enable relocation" 345 " on exceptions: %ld\n", rc); 346 } 347 break; 348 } 349 350 delay = get_longbusy_msecs(rc); 351 total_delay += delay; 352 if (total_delay > 1000) { 353 pr_warn("Warning: Giving up waiting to enable " 354 "relocation on exceptions (%u msec)!\n", 355 total_delay); 356 return; 357 } 358 359 mdelay(delay); 360 } 361 } 362 EXPORT_SYMBOL(pseries_enable_reloc_on_exc); 363 364 void pseries_disable_reloc_on_exc(void) 365 { 366 long rc; 367 368 while (1) { 369 rc = disable_reloc_on_exceptions(); 370 if (!H_IS_LONG_BUSY(rc)) 371 break; 372 mdelay(get_longbusy_msecs(rc)); 373 } 374 if (rc != H_SUCCESS) 375 pr_warn("Warning: Failed to disable relocation on exceptions: %ld\n", 376 rc); 377 } 378 EXPORT_SYMBOL(pseries_disable_reloc_on_exc); 379 380 #ifdef CONFIG_KEXEC_CORE 381 static void pSeries_machine_kexec(struct kimage *image) 382 { 383 if (firmware_has_feature(FW_FEATURE_SET_MODE)) 384 pseries_disable_reloc_on_exc(); 385 386 default_machine_kexec(image); 387 } 388 #endif 389 390 #ifdef __LITTLE_ENDIAN__ 391 void pseries_big_endian_exceptions(void) 392 { 393 long rc; 394 395 while (1) { 396 rc = enable_big_endian_exceptions(); 397 if (!H_IS_LONG_BUSY(rc)) 398 break; 399 mdelay(get_longbusy_msecs(rc)); 400 } 401 402 /* 403 * At this point it is unlikely panic() will get anything 404 * out to the user, since this is called very late in kexec 405 * but at least this will stop us from continuing on further 406 * and creating an even more difficult to debug situation. 407 * 408 * There is a known problem when kdump'ing, if cpus are offline 409 * the above call will fail. Rather than panicking again, keep 410 * going and hope the kdump kernel is also little endian, which 411 * it usually is. 412 */ 413 if (rc && !kdump_in_progress()) 414 panic("Could not enable big endian exceptions"); 415 } 416 417 void pseries_little_endian_exceptions(void) 418 { 419 long rc; 420 421 while (1) { 422 rc = enable_little_endian_exceptions(); 423 if (!H_IS_LONG_BUSY(rc)) 424 break; 425 mdelay(get_longbusy_msecs(rc)); 426 } 427 if (rc) { 428 ppc_md.progress("H_SET_MODE LE exception fail", 0); 429 panic("Could not enable little endian exceptions"); 430 } 431 } 432 #endif 433 434 static void __init find_and_init_phbs(void) 435 { 436 struct device_node *node; 437 struct pci_controller *phb; 438 struct device_node *root = of_find_node_by_path("/"); 439 440 for_each_child_of_node(root, node) { 441 if (node->type == NULL || (strcmp(node->type, "pci") != 0 && 442 strcmp(node->type, "pciex") != 0)) 443 continue; 444 445 phb = pcibios_alloc_controller(node); 446 if (!phb) 447 continue; 448 rtas_setup_phb(phb); 449 pci_process_bridge_OF_ranges(phb, node, 0); 450 isa_bridge_find_early(phb); 451 phb->controller_ops = pseries_pci_controller_ops; 452 } 453 454 of_node_put(root); 455 456 /* 457 * PCI_PROBE_ONLY and PCI_REASSIGN_ALL_BUS can be set via properties 458 * in chosen. 459 */ 460 of_pci_check_probe_only(); 461 } 462 463 static void init_cpu_char_feature_flags(struct h_cpu_char_result *result) 464 { 465 /* 466 * The features below are disabled by default, so we instead look to see 467 * if firmware has *enabled* them, and set them if so. 468 */ 469 if (result->character & H_CPU_CHAR_SPEC_BAR_ORI31) 470 security_ftr_set(SEC_FTR_SPEC_BAR_ORI31); 471 472 if (result->character & H_CPU_CHAR_BCCTRL_SERIALISED) 473 security_ftr_set(SEC_FTR_BCCTRL_SERIALISED); 474 475 if (result->character & H_CPU_CHAR_L1D_FLUSH_ORI30) 476 security_ftr_set(SEC_FTR_L1D_FLUSH_ORI30); 477 478 if (result->character & H_CPU_CHAR_L1D_FLUSH_TRIG2) 479 security_ftr_set(SEC_FTR_L1D_FLUSH_TRIG2); 480 481 if (result->character & H_CPU_CHAR_L1D_THREAD_PRIV) 482 security_ftr_set(SEC_FTR_L1D_THREAD_PRIV); 483 484 if (result->character & H_CPU_CHAR_COUNT_CACHE_DISABLED) 485 security_ftr_set(SEC_FTR_COUNT_CACHE_DISABLED); 486 487 /* 488 * The features below are enabled by default, so we instead look to see 489 * if firmware has *disabled* them, and clear them if so. 490 */ 491 if (!(result->behaviour & H_CPU_BEHAV_FAVOUR_SECURITY)) 492 security_ftr_clear(SEC_FTR_FAVOUR_SECURITY); 493 494 if (!(result->behaviour & H_CPU_BEHAV_L1D_FLUSH_PR)) 495 security_ftr_clear(SEC_FTR_L1D_FLUSH_PR); 496 497 if (!(result->behaviour & H_CPU_BEHAV_BNDS_CHK_SPEC_BAR)) 498 security_ftr_clear(SEC_FTR_BNDS_CHK_SPEC_BAR); 499 } 500 501 void pseries_setup_rfi_flush(void) 502 { 503 struct h_cpu_char_result result; 504 enum l1d_flush_type types; 505 bool enable; 506 long rc; 507 508 /* 509 * Set features to the defaults assumed by init_cpu_char_feature_flags() 510 * so it can set/clear again any features that might have changed after 511 * migration, and in case the hypercall fails and it is not even called. 512 */ 513 powerpc_security_features = SEC_FTR_DEFAULT; 514 515 rc = plpar_get_cpu_characteristics(&result); 516 if (rc == H_SUCCESS) 517 init_cpu_char_feature_flags(&result); 518 519 /* 520 * We're the guest so this doesn't apply to us, clear it to simplify 521 * handling of it elsewhere. 522 */ 523 security_ftr_clear(SEC_FTR_L1D_FLUSH_HV); 524 525 types = L1D_FLUSH_FALLBACK; 526 527 if (security_ftr_enabled(SEC_FTR_L1D_FLUSH_TRIG2)) 528 types |= L1D_FLUSH_MTTRIG; 529 530 if (security_ftr_enabled(SEC_FTR_L1D_FLUSH_ORI30)) 531 types |= L1D_FLUSH_ORI; 532 533 enable = security_ftr_enabled(SEC_FTR_FAVOUR_SECURITY) && \ 534 security_ftr_enabled(SEC_FTR_L1D_FLUSH_PR); 535 536 setup_rfi_flush(types, enable); 537 setup_barrier_nospec(); 538 } 539 540 #ifdef CONFIG_PCI_IOV 541 enum rtas_iov_fw_value_map { 542 NUM_RES_PROPERTY = 0, /* Number of Resources */ 543 LOW_INT = 1, /* Lowest 32 bits of Address */ 544 START_OF_ENTRIES = 2, /* Always start of entry */ 545 APERTURE_PROPERTY = 2, /* Start of entry+ to Aperture Size */ 546 WDW_SIZE_PROPERTY = 4, /* Start of entry+ to Window Size */ 547 NEXT_ENTRY = 7 /* Go to next entry on array */ 548 }; 549 550 enum get_iov_fw_value_index { 551 BAR_ADDRS = 1, /* Get Bar Address */ 552 APERTURE_SIZE = 2, /* Get Aperture Size */ 553 WDW_SIZE = 3 /* Get Window Size */ 554 }; 555 556 resource_size_t pseries_get_iov_fw_value(struct pci_dev *dev, int resno, 557 enum get_iov_fw_value_index value) 558 { 559 const int *indexes; 560 struct device_node *dn = pci_device_to_OF_node(dev); 561 int i, num_res, ret = 0; 562 563 indexes = of_get_property(dn, "ibm,open-sriov-vf-bar-info", NULL); 564 if (!indexes) 565 return 0; 566 567 /* 568 * First element in the array is the number of Bars 569 * returned. Search through the list to find the matching 570 * bar 571 */ 572 num_res = of_read_number(&indexes[NUM_RES_PROPERTY], 1); 573 if (resno >= num_res) 574 return 0; /* or an errror */ 575 576 i = START_OF_ENTRIES + NEXT_ENTRY * resno; 577 switch (value) { 578 case BAR_ADDRS: 579 ret = of_read_number(&indexes[i], 2); 580 break; 581 case APERTURE_SIZE: 582 ret = of_read_number(&indexes[i + APERTURE_PROPERTY], 2); 583 break; 584 case WDW_SIZE: 585 ret = of_read_number(&indexes[i + WDW_SIZE_PROPERTY], 2); 586 break; 587 } 588 589 return ret; 590 } 591 592 void of_pci_set_vf_bar_size(struct pci_dev *dev, const int *indexes) 593 { 594 struct resource *res; 595 resource_size_t base, size; 596 int i, r, num_res; 597 598 num_res = of_read_number(&indexes[NUM_RES_PROPERTY], 1); 599 num_res = min_t(int, num_res, PCI_SRIOV_NUM_BARS); 600 for (i = START_OF_ENTRIES, r = 0; r < num_res && r < PCI_SRIOV_NUM_BARS; 601 i += NEXT_ENTRY, r++) { 602 res = &dev->resource[r + PCI_IOV_RESOURCES]; 603 base = of_read_number(&indexes[i], 2); 604 size = of_read_number(&indexes[i + APERTURE_PROPERTY], 2); 605 res->flags = pci_parse_of_flags(of_read_number 606 (&indexes[i + LOW_INT], 1), 0); 607 res->flags |= (IORESOURCE_MEM_64 | IORESOURCE_PCI_FIXED); 608 res->name = pci_name(dev); 609 res->start = base; 610 res->end = base + size - 1; 611 } 612 } 613 614 void of_pci_parse_iov_addrs(struct pci_dev *dev, const int *indexes) 615 { 616 struct resource *res, *root, *conflict; 617 resource_size_t base, size; 618 int i, r, num_res; 619 620 /* 621 * First element in the array is the number of Bars 622 * returned. Search through the list to find the matching 623 * bars assign them from firmware into resources structure. 624 */ 625 num_res = of_read_number(&indexes[NUM_RES_PROPERTY], 1); 626 for (i = START_OF_ENTRIES, r = 0; r < num_res && r < PCI_SRIOV_NUM_BARS; 627 i += NEXT_ENTRY, r++) { 628 res = &dev->resource[r + PCI_IOV_RESOURCES]; 629 base = of_read_number(&indexes[i], 2); 630 size = of_read_number(&indexes[i + WDW_SIZE_PROPERTY], 2); 631 res->name = pci_name(dev); 632 res->start = base; 633 res->end = base + size - 1; 634 root = &iomem_resource; 635 dev_dbg(&dev->dev, 636 "pSeries IOV BAR %d: trying firmware assignment %pR\n", 637 r + PCI_IOV_RESOURCES, res); 638 conflict = request_resource_conflict(root, res); 639 if (conflict) { 640 dev_info(&dev->dev, 641 "BAR %d: %pR conflicts with %s %pR\n", 642 r + PCI_IOV_RESOURCES, res, 643 conflict->name, conflict); 644 res->flags |= IORESOURCE_UNSET; 645 } 646 } 647 } 648 649 static void pseries_pci_fixup_resources(struct pci_dev *pdev) 650 { 651 const int *indexes; 652 struct device_node *dn = pci_device_to_OF_node(pdev); 653 654 /*Firmware must support open sriov otherwise dont configure*/ 655 indexes = of_get_property(dn, "ibm,open-sriov-vf-bar-info", NULL); 656 if (!indexes) 657 return; 658 /* Assign the addresses from device tree*/ 659 of_pci_set_vf_bar_size(pdev, indexes); 660 } 661 662 static void pseries_pci_fixup_iov_resources(struct pci_dev *pdev) 663 { 664 const int *indexes; 665 struct device_node *dn = pci_device_to_OF_node(pdev); 666 667 if (!pdev->is_physfn || pdev->is_added) 668 return; 669 /*Firmware must support open sriov otherwise dont configure*/ 670 indexes = of_get_property(dn, "ibm,open-sriov-vf-bar-info", NULL); 671 if (!indexes) 672 return; 673 /* Assign the addresses from device tree*/ 674 of_pci_parse_iov_addrs(pdev, indexes); 675 } 676 677 static resource_size_t pseries_pci_iov_resource_alignment(struct pci_dev *pdev, 678 int resno) 679 { 680 const __be32 *reg; 681 struct device_node *dn = pci_device_to_OF_node(pdev); 682 683 /*Firmware must support open sriov otherwise report regular alignment*/ 684 reg = of_get_property(dn, "ibm,is-open-sriov-pf", NULL); 685 if (!reg) 686 return pci_iov_resource_size(pdev, resno); 687 688 if (!pdev->is_physfn) 689 return 0; 690 return pseries_get_iov_fw_value(pdev, 691 resno - PCI_IOV_RESOURCES, 692 APERTURE_SIZE); 693 } 694 #endif 695 696 static void __init pSeries_setup_arch(void) 697 { 698 set_arch_panic_timeout(10, ARCH_PANIC_TIMEOUT); 699 700 /* Discover PIC type and setup ppc_md accordingly */ 701 smp_init_pseries(); 702 703 704 /* openpic global configuration register (64-bit format). */ 705 /* openpic Interrupt Source Unit pointer (64-bit format). */ 706 /* python0 facility area (mmio) (64-bit format) REAL address. */ 707 708 /* init to some ~sane value until calibrate_delay() runs */ 709 loops_per_jiffy = 50000000; 710 711 fwnmi_init(); 712 713 pseries_setup_rfi_flush(); 714 setup_stf_barrier(); 715 716 /* By default, only probe PCI (can be overridden by rtas_pci) */ 717 pci_add_flags(PCI_PROBE_ONLY); 718 719 /* Find and initialize PCI host bridges */ 720 init_pci_config_tokens(); 721 find_and_init_phbs(); 722 of_reconfig_notifier_register(&pci_dn_reconfig_nb); 723 724 pSeries_nvram_init(); 725 726 if (firmware_has_feature(FW_FEATURE_LPAR)) { 727 vpa_init(boot_cpuid); 728 ppc_md.power_save = pseries_lpar_idle; 729 ppc_md.enable_pmcs = pseries_lpar_enable_pmcs; 730 #ifdef CONFIG_PCI_IOV 731 ppc_md.pcibios_fixup_resources = 732 pseries_pci_fixup_resources; 733 ppc_md.pcibios_fixup_sriov = 734 pseries_pci_fixup_iov_resources; 735 ppc_md.pcibios_iov_resource_alignment = 736 pseries_pci_iov_resource_alignment; 737 #endif 738 } else { 739 /* No special idle routine */ 740 ppc_md.enable_pmcs = power4_enable_pmcs; 741 } 742 743 ppc_md.pcibios_root_bridge_prepare = pseries_root_bridge_prepare; 744 } 745 746 static void pseries_panic(char *str) 747 { 748 panic_flush_kmsg_end(); 749 rtas_os_term(str); 750 } 751 752 static int __init pSeries_init_panel(void) 753 { 754 /* Manually leave the kernel version on the panel. */ 755 #ifdef __BIG_ENDIAN__ 756 ppc_md.progress("Linux ppc64\n", 0); 757 #else 758 ppc_md.progress("Linux ppc64le\n", 0); 759 #endif 760 ppc_md.progress(init_utsname()->version, 0); 761 762 return 0; 763 } 764 machine_arch_initcall(pseries, pSeries_init_panel); 765 766 static int pseries_set_dabr(unsigned long dabr, unsigned long dabrx) 767 { 768 return plpar_hcall_norets(H_SET_DABR, dabr); 769 } 770 771 static int pseries_set_xdabr(unsigned long dabr, unsigned long dabrx) 772 { 773 /* Have to set at least one bit in the DABRX according to PAPR */ 774 if (dabrx == 0 && dabr == 0) 775 dabrx = DABRX_USER; 776 /* PAPR says we can only set kernel and user bits */ 777 dabrx &= DABRX_KERNEL | DABRX_USER; 778 779 return plpar_hcall_norets(H_SET_XDABR, dabr, dabrx); 780 } 781 782 static int pseries_set_dawr(unsigned long dawr, unsigned long dawrx) 783 { 784 /* PAPR says we can't set HYP */ 785 dawrx &= ~DAWRX_HYP; 786 787 return plpar_set_watchpoint0(dawr, dawrx); 788 } 789 790 #define CMO_CHARACTERISTICS_TOKEN 44 791 #define CMO_MAXLENGTH 1026 792 793 void pSeries_coalesce_init(void) 794 { 795 struct hvcall_mpp_x_data mpp_x_data; 796 797 if (firmware_has_feature(FW_FEATURE_CMO) && !h_get_mpp_x(&mpp_x_data)) 798 powerpc_firmware_features |= FW_FEATURE_XCMO; 799 else 800 powerpc_firmware_features &= ~FW_FEATURE_XCMO; 801 } 802 803 /** 804 * fw_cmo_feature_init - FW_FEATURE_CMO is not stored in ibm,hypertas-functions, 805 * handle that here. (Stolen from parse_system_parameter_string) 806 */ 807 static void pSeries_cmo_feature_init(void) 808 { 809 char *ptr, *key, *value, *end; 810 int call_status; 811 int page_order = IOMMU_PAGE_SHIFT_4K; 812 813 pr_debug(" -> fw_cmo_feature_init()\n"); 814 spin_lock(&rtas_data_buf_lock); 815 memset(rtas_data_buf, 0, RTAS_DATA_BUF_SIZE); 816 call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1, 817 NULL, 818 CMO_CHARACTERISTICS_TOKEN, 819 __pa(rtas_data_buf), 820 RTAS_DATA_BUF_SIZE); 821 822 if (call_status != 0) { 823 spin_unlock(&rtas_data_buf_lock); 824 pr_debug("CMO not available\n"); 825 pr_debug(" <- fw_cmo_feature_init()\n"); 826 return; 827 } 828 829 end = rtas_data_buf + CMO_MAXLENGTH - 2; 830 ptr = rtas_data_buf + 2; /* step over strlen value */ 831 key = value = ptr; 832 833 while (*ptr && (ptr <= end)) { 834 /* Separate the key and value by replacing '=' with '\0' and 835 * point the value at the string after the '=' 836 */ 837 if (ptr[0] == '=') { 838 ptr[0] = '\0'; 839 value = ptr + 1; 840 } else if (ptr[0] == '\0' || ptr[0] == ',') { 841 /* Terminate the string containing the key/value pair */ 842 ptr[0] = '\0'; 843 844 if (key == value) { 845 pr_debug("Malformed key/value pair\n"); 846 /* Never found a '=', end processing */ 847 break; 848 } 849 850 if (0 == strcmp(key, "CMOPageSize")) 851 page_order = simple_strtol(value, NULL, 10); 852 else if (0 == strcmp(key, "PrPSP")) 853 CMO_PrPSP = simple_strtol(value, NULL, 10); 854 else if (0 == strcmp(key, "SecPSP")) 855 CMO_SecPSP = simple_strtol(value, NULL, 10); 856 value = key = ptr + 1; 857 } 858 ptr++; 859 } 860 861 /* Page size is returned as the power of 2 of the page size, 862 * convert to the page size in bytes before returning 863 */ 864 CMO_PageSize = 1 << page_order; 865 pr_debug("CMO_PageSize = %lu\n", CMO_PageSize); 866 867 if (CMO_PrPSP != -1 || CMO_SecPSP != -1) { 868 pr_info("CMO enabled\n"); 869 pr_debug("CMO enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP, 870 CMO_SecPSP); 871 powerpc_firmware_features |= FW_FEATURE_CMO; 872 pSeries_coalesce_init(); 873 } else 874 pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP, 875 CMO_SecPSP); 876 spin_unlock(&rtas_data_buf_lock); 877 pr_debug(" <- fw_cmo_feature_init()\n"); 878 } 879 880 /* 881 * Early initialization. Relocation is on but do not reference unbolted pages 882 */ 883 static void __init pseries_init(void) 884 { 885 pr_debug(" -> pseries_init()\n"); 886 887 #ifdef CONFIG_HVC_CONSOLE 888 if (firmware_has_feature(FW_FEATURE_LPAR)) 889 hvc_vio_init_early(); 890 #endif 891 if (firmware_has_feature(FW_FEATURE_XDABR)) 892 ppc_md.set_dabr = pseries_set_xdabr; 893 else if (firmware_has_feature(FW_FEATURE_DABR)) 894 ppc_md.set_dabr = pseries_set_dabr; 895 896 if (firmware_has_feature(FW_FEATURE_SET_MODE)) 897 ppc_md.set_dawr = pseries_set_dawr; 898 899 pSeries_cmo_feature_init(); 900 iommu_init_early_pSeries(); 901 902 pr_debug(" <- pseries_init()\n"); 903 } 904 905 /** 906 * pseries_power_off - tell firmware about how to power off the system. 907 * 908 * This function calls either the power-off rtas token in normal cases 909 * or the ibm,power-off-ups token (if present & requested) in case of 910 * a power failure. If power-off token is used, power on will only be 911 * possible with power button press. If ibm,power-off-ups token is used 912 * it will allow auto poweron after power is restored. 913 */ 914 static void pseries_power_off(void) 915 { 916 int rc; 917 int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups"); 918 919 if (rtas_flash_term_hook) 920 rtas_flash_term_hook(SYS_POWER_OFF); 921 922 if (rtas_poweron_auto == 0 || 923 rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) { 924 rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1); 925 printk(KERN_INFO "RTAS power-off returned %d\n", rc); 926 } else { 927 rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL); 928 printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc); 929 } 930 for (;;); 931 } 932 933 static int __init pSeries_probe(void) 934 { 935 const char *dtype = of_get_property(of_root, "device_type", NULL); 936 937 if (dtype == NULL) 938 return 0; 939 if (strcmp(dtype, "chrp")) 940 return 0; 941 942 /* Cell blades firmware claims to be chrp while it's not. Until this 943 * is fixed, we need to avoid those here. 944 */ 945 if (of_machine_is_compatible("IBM,CPBW-1.0") || 946 of_machine_is_compatible("IBM,CBEA")) 947 return 0; 948 949 pm_power_off = pseries_power_off; 950 951 pr_debug("Machine is%s LPAR !\n", 952 (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not"); 953 954 pseries_init(); 955 956 return 1; 957 } 958 959 static int pSeries_pci_probe_mode(struct pci_bus *bus) 960 { 961 if (firmware_has_feature(FW_FEATURE_LPAR)) 962 return PCI_PROBE_DEVTREE; 963 return PCI_PROBE_NORMAL; 964 } 965 966 struct pci_controller_ops pseries_pci_controller_ops = { 967 .probe_mode = pSeries_pci_probe_mode, 968 }; 969 970 define_machine(pseries) { 971 .name = "pSeries", 972 .probe = pSeries_probe, 973 .setup_arch = pSeries_setup_arch, 974 .init_IRQ = pseries_init_irq, 975 .show_cpuinfo = pSeries_show_cpuinfo, 976 .log_error = pSeries_log_error, 977 .pcibios_fixup = pSeries_final_fixup, 978 .restart = rtas_restart, 979 .halt = rtas_halt, 980 .panic = pseries_panic, 981 .get_boot_time = rtas_get_boot_time, 982 .get_rtc_time = rtas_get_rtc_time, 983 .set_rtc_time = rtas_set_rtc_time, 984 .calibrate_decr = generic_calibrate_decr, 985 .progress = rtas_progress, 986 .system_reset_exception = pSeries_system_reset_exception, 987 .machine_check_exception = pSeries_machine_check_exception, 988 #ifdef CONFIG_KEXEC_CORE 989 .machine_kexec = pSeries_machine_kexec, 990 .kexec_cpu_down = pseries_kexec_cpu_down, 991 #endif 992 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE 993 .memory_block_size = pseries_memory_block_size, 994 #endif 995 }; 996