1 /* 2 * Support PCI/PCIe on PowerNV platforms 3 * 4 * Copyright 2011 Benjamin Herrenschmidt, IBM Corp. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12 #undef DEBUG 13 14 #include <linux/kernel.h> 15 #include <linux/pci.h> 16 #include <linux/delay.h> 17 #include <linux/string.h> 18 #include <linux/init.h> 19 #include <linux/bootmem.h> 20 #include <linux/irq.h> 21 #include <linux/io.h> 22 #include <linux/msi.h> 23 24 #include <asm/sections.h> 25 #include <asm/io.h> 26 #include <asm/prom.h> 27 #include <asm/pci-bridge.h> 28 #include <asm/machdep.h> 29 #include <asm/ppc-pci.h> 30 #include <asm/opal.h> 31 #include <asm/iommu.h> 32 #include <asm/tce.h> 33 #include <asm/abs_addr.h> 34 35 #include "powernv.h" 36 #include "pci.h" 37 38 struct resource_wrap { 39 struct list_head link; 40 resource_size_t size; 41 resource_size_t align; 42 struct pci_dev *dev; /* Set if it's a device */ 43 struct pci_bus *bus; /* Set if it's a bridge */ 44 }; 45 46 static int __pe_printk(const char *level, const struct pnv_ioda_pe *pe, 47 struct va_format *vaf) 48 { 49 char pfix[32]; 50 51 if (pe->pdev) 52 strlcpy(pfix, dev_name(&pe->pdev->dev), sizeof(pfix)); 53 else 54 sprintf(pfix, "%04x:%02x ", 55 pci_domain_nr(pe->pbus), pe->pbus->number); 56 return printk("pci %s%s: [PE# %.3d] %pV", level, pfix, pe->pe_number, vaf); 57 } 58 59 #define define_pe_printk_level(func, kern_level) \ 60 static int func(const struct pnv_ioda_pe *pe, const char *fmt, ...) \ 61 { \ 62 struct va_format vaf; \ 63 va_list args; \ 64 int r; \ 65 \ 66 va_start(args, fmt); \ 67 \ 68 vaf.fmt = fmt; \ 69 vaf.va = &args; \ 70 \ 71 r = __pe_printk(kern_level, pe, &vaf); \ 72 va_end(args); \ 73 \ 74 return r; \ 75 } \ 76 77 define_pe_printk_level(pe_err, KERN_ERR); 78 define_pe_printk_level(pe_warn, KERN_WARNING); 79 define_pe_printk_level(pe_info, KERN_INFO); 80 81 82 /* Calculate resource usage & alignment requirement of a single 83 * device. This will also assign all resources within the device 84 * for a given type starting at 0 for the biggest one and then 85 * assigning in decreasing order of size. 86 */ 87 static void __devinit pnv_ioda_calc_dev(struct pci_dev *dev, unsigned int flags, 88 resource_size_t *size, 89 resource_size_t *align) 90 { 91 resource_size_t start; 92 struct resource *r; 93 int i; 94 95 pr_devel(" -> CDR %s\n", pci_name(dev)); 96 97 *size = *align = 0; 98 99 /* Clear the resources out and mark them all unset */ 100 for (i = 0; i <= PCI_ROM_RESOURCE; i++) { 101 r = &dev->resource[i]; 102 if (!(r->flags & flags)) 103 continue; 104 if (r->start) { 105 r->end -= r->start; 106 r->start = 0; 107 } 108 r->flags |= IORESOURCE_UNSET; 109 } 110 111 /* We currently keep all memory resources together, we 112 * will handle prefetch & 64-bit separately in the future 113 * but for now we stick everybody in M32 114 */ 115 start = 0; 116 for (;;) { 117 resource_size_t max_size = 0; 118 int max_no = -1; 119 120 /* Find next biggest resource */ 121 for (i = 0; i <= PCI_ROM_RESOURCE; i++) { 122 r = &dev->resource[i]; 123 if (!(r->flags & IORESOURCE_UNSET) || 124 !(r->flags & flags)) 125 continue; 126 if (resource_size(r) > max_size) { 127 max_size = resource_size(r); 128 max_no = i; 129 } 130 } 131 if (max_no < 0) 132 break; 133 r = &dev->resource[max_no]; 134 if (max_size > *align) 135 *align = max_size; 136 *size += max_size; 137 r->start = start; 138 start += max_size; 139 r->end = r->start + max_size - 1; 140 r->flags &= ~IORESOURCE_UNSET; 141 pr_devel(" -> R%d %016llx..%016llx\n", 142 max_no, r->start, r->end); 143 } 144 pr_devel(" <- CDR %s size=%llx align=%llx\n", 145 pci_name(dev), *size, *align); 146 } 147 148 /* Allocate a resource "wrap" for a given device or bridge and 149 * insert it at the right position in the sorted list 150 */ 151 static void __devinit pnv_ioda_add_wrap(struct list_head *list, 152 struct pci_bus *bus, 153 struct pci_dev *dev, 154 resource_size_t size, 155 resource_size_t align) 156 { 157 struct resource_wrap *w1, *w = kzalloc(sizeof(*w), GFP_KERNEL); 158 159 w->size = size; 160 w->align = align; 161 w->dev = dev; 162 w->bus = bus; 163 164 list_for_each_entry(w1, list, link) { 165 if (w1->align < align) { 166 list_add_tail(&w->link, &w1->link); 167 return; 168 } 169 } 170 list_add_tail(&w->link, list); 171 } 172 173 /* Offset device resources of a given type */ 174 static void __devinit pnv_ioda_offset_dev(struct pci_dev *dev, 175 unsigned int flags, 176 resource_size_t offset) 177 { 178 struct resource *r; 179 int i; 180 181 pr_devel(" -> ODR %s [%x] +%016llx\n", pci_name(dev), flags, offset); 182 183 for (i = 0; i <= PCI_ROM_RESOURCE; i++) { 184 r = &dev->resource[i]; 185 if (r->flags & flags) { 186 dev->resource[i].start += offset; 187 dev->resource[i].end += offset; 188 } 189 } 190 191 pr_devel(" <- ODR %s [%x] +%016llx\n", pci_name(dev), flags, offset); 192 } 193 194 /* Offset bus resources (& all children) of a given type */ 195 static void __devinit pnv_ioda_offset_bus(struct pci_bus *bus, 196 unsigned int flags, 197 resource_size_t offset) 198 { 199 struct resource *r; 200 struct pci_dev *dev; 201 struct pci_bus *cbus; 202 int i; 203 204 pr_devel(" -> OBR %s [%x] +%016llx\n", 205 bus->self ? pci_name(bus->self) : "root", flags, offset); 206 207 pci_bus_for_each_resource(bus, r, i) { 208 if (r && (r->flags & flags)) { 209 r->start += offset; 210 r->end += offset; 211 } 212 } 213 list_for_each_entry(dev, &bus->devices, bus_list) 214 pnv_ioda_offset_dev(dev, flags, offset); 215 list_for_each_entry(cbus, &bus->children, node) 216 pnv_ioda_offset_bus(cbus, flags, offset); 217 218 pr_devel(" <- OBR %s [%x]\n", 219 bus->self ? pci_name(bus->self) : "root", flags); 220 } 221 222 /* This is the guts of our IODA resource allocation. This is called 223 * recursively for each bus in the system. It calculates all the 224 * necessary size and requirements for children and assign them 225 * resources such that: 226 * 227 * - Each function fits in it's own contiguous set of IO/M32 228 * segment 229 * 230 * - All segments behind a P2P bridge are contiguous and obey 231 * alignment constraints of those bridges 232 */ 233 static void __devinit pnv_ioda_calc_bus(struct pci_bus *bus, unsigned int flags, 234 resource_size_t *size, 235 resource_size_t *align) 236 { 237 struct pci_controller *hose = pci_bus_to_host(bus); 238 struct pnv_phb *phb = hose->private_data; 239 resource_size_t dev_size, dev_align, start; 240 resource_size_t min_align, min_balign; 241 struct pci_dev *cdev; 242 struct pci_bus *cbus; 243 struct list_head head; 244 struct resource_wrap *w; 245 unsigned int bres; 246 247 *size = *align = 0; 248 249 pr_devel("-> CBR %s [%x]\n", 250 bus->self ? pci_name(bus->self) : "root", flags); 251 252 /* Calculate alignment requirements based on the type 253 * of resource we are working on 254 */ 255 if (flags & IORESOURCE_IO) { 256 bres = 0; 257 min_align = phb->ioda.io_segsize; 258 min_balign = 0x1000; 259 } else { 260 bres = 1; 261 min_align = phb->ioda.m32_segsize; 262 min_balign = 0x100000; 263 } 264 265 /* Gather all our children resources ordered by alignment */ 266 INIT_LIST_HEAD(&head); 267 268 /* - Busses */ 269 list_for_each_entry(cbus, &bus->children, node) { 270 pnv_ioda_calc_bus(cbus, flags, &dev_size, &dev_align); 271 pnv_ioda_add_wrap(&head, cbus, NULL, dev_size, dev_align); 272 } 273 274 /* - Devices */ 275 list_for_each_entry(cdev, &bus->devices, bus_list) { 276 pnv_ioda_calc_dev(cdev, flags, &dev_size, &dev_align); 277 /* Align them to segment size */ 278 if (dev_align < min_align) 279 dev_align = min_align; 280 pnv_ioda_add_wrap(&head, NULL, cdev, dev_size, dev_align); 281 } 282 if (list_empty(&head)) 283 goto empty; 284 285 /* Now we can do two things: assign offsets to them within that 286 * level and get our total alignment & size requirements. The 287 * assignment algorithm is going to be uber-trivial for now, we 288 * can try to be smarter later at filling out holes. 289 */ 290 if (bus->self) { 291 /* No offset for downstream bridges */ 292 start = 0; 293 } else { 294 /* Offset from the root */ 295 if (flags & IORESOURCE_IO) 296 /* Don't hand out IO 0 */ 297 start = hose->io_resource.start + 0x1000; 298 else 299 start = hose->mem_resources[0].start; 300 } 301 while(!list_empty(&head)) { 302 w = list_first_entry(&head, struct resource_wrap, link); 303 list_del(&w->link); 304 if (w->size) { 305 if (start) { 306 start = ALIGN(start, w->align); 307 if (w->dev) 308 pnv_ioda_offset_dev(w->dev,flags,start); 309 else if (w->bus) 310 pnv_ioda_offset_bus(w->bus,flags,start); 311 } 312 if (w->align > *align) 313 *align = w->align; 314 } 315 start += w->size; 316 kfree(w); 317 } 318 *size = start; 319 320 /* Align and setup bridge resources */ 321 *align = max_t(resource_size_t, *align, 322 max_t(resource_size_t, min_align, min_balign)); 323 *size = ALIGN(*size, 324 max_t(resource_size_t, min_align, min_balign)); 325 empty: 326 /* Only setup P2P's, not the PHB itself */ 327 if (bus->self) { 328 struct resource *res = bus->resource[bres]; 329 330 if (WARN_ON(res == NULL)) 331 return; 332 333 /* 334 * FIXME: We should probably export and call 335 * pci_bridge_check_ranges() to properly re-initialize 336 * the PCI portion of the flags here, and to detect 337 * what the bridge actually supports. 338 */ 339 res->start = 0; 340 res->flags = (*size) ? flags : 0; 341 res->end = (*size) ? (*size - 1) : 0; 342 } 343 344 pr_devel("<- CBR %s [%x] *size=%016llx *align=%016llx\n", 345 bus->self ? pci_name(bus->self) : "root", flags,*size,*align); 346 } 347 348 static struct pci_dn *pnv_ioda_get_pdn(struct pci_dev *dev) 349 { 350 struct device_node *np; 351 352 np = pci_device_to_OF_node(dev); 353 if (!np) 354 return NULL; 355 return PCI_DN(np); 356 } 357 358 static void __devinit pnv_ioda_setup_pe_segments(struct pci_dev *dev) 359 { 360 struct pci_controller *hose = pci_bus_to_host(dev->bus); 361 struct pnv_phb *phb = hose->private_data; 362 struct pci_dn *pdn = pnv_ioda_get_pdn(dev); 363 unsigned int pe, i; 364 resource_size_t pos; 365 struct resource io_res; 366 struct resource m32_res; 367 struct pci_bus_region region; 368 int rc; 369 370 /* Anything not referenced in the device-tree gets PE#0 */ 371 pe = pdn ? pdn->pe_number : 0; 372 373 /* Calculate the device min/max */ 374 io_res.start = m32_res.start = (resource_size_t)-1; 375 io_res.end = m32_res.end = 0; 376 io_res.flags = IORESOURCE_IO; 377 m32_res.flags = IORESOURCE_MEM; 378 379 for (i = 0; i <= PCI_ROM_RESOURCE; i++) { 380 struct resource *r = NULL; 381 if (dev->resource[i].flags & IORESOURCE_IO) 382 r = &io_res; 383 if (dev->resource[i].flags & IORESOURCE_MEM) 384 r = &m32_res; 385 if (!r) 386 continue; 387 if (dev->resource[i].start < r->start) 388 r->start = dev->resource[i].start; 389 if (dev->resource[i].end > r->end) 390 r->end = dev->resource[i].end; 391 } 392 393 /* Setup IO segments */ 394 if (io_res.start < io_res.end) { 395 pcibios_resource_to_bus(dev, ®ion, &io_res); 396 pos = region.start; 397 i = pos / phb->ioda.io_segsize; 398 while(i < phb->ioda.total_pe && pos <= region.end) { 399 if (phb->ioda.io_segmap[i]) { 400 pr_err("%s: Trying to use IO seg #%d which is" 401 " already used by PE# %d\n", 402 pci_name(dev), i, 403 phb->ioda.io_segmap[i]); 404 /* XXX DO SOMETHING TO DISABLE DEVICE ? */ 405 break; 406 } 407 phb->ioda.io_segmap[i] = pe; 408 rc = opal_pci_map_pe_mmio_window(phb->opal_id, pe, 409 OPAL_IO_WINDOW_TYPE, 410 0, i); 411 if (rc != OPAL_SUCCESS) { 412 pr_err("%s: OPAL error %d setting up mapping" 413 " for IO seg# %d\n", 414 pci_name(dev), rc, i); 415 /* XXX DO SOMETHING TO DISABLE DEVICE ? */ 416 break; 417 } 418 pos += phb->ioda.io_segsize; 419 i++; 420 }; 421 } 422 423 /* Setup M32 segments */ 424 if (m32_res.start < m32_res.end) { 425 pcibios_resource_to_bus(dev, ®ion, &m32_res); 426 pos = region.start; 427 i = pos / phb->ioda.m32_segsize; 428 while(i < phb->ioda.total_pe && pos <= region.end) { 429 if (phb->ioda.m32_segmap[i]) { 430 pr_err("%s: Trying to use M32 seg #%d which is" 431 " already used by PE# %d\n", 432 pci_name(dev), i, 433 phb->ioda.m32_segmap[i]); 434 /* XXX DO SOMETHING TO DISABLE DEVICE ? */ 435 break; 436 } 437 phb->ioda.m32_segmap[i] = pe; 438 rc = opal_pci_map_pe_mmio_window(phb->opal_id, pe, 439 OPAL_M32_WINDOW_TYPE, 440 0, i); 441 if (rc != OPAL_SUCCESS) { 442 pr_err("%s: OPAL error %d setting up mapping" 443 " for M32 seg# %d\n", 444 pci_name(dev), rc, i); 445 /* XXX DO SOMETHING TO DISABLE DEVICE ? */ 446 break; 447 } 448 pos += phb->ioda.m32_segsize; 449 i++; 450 } 451 } 452 } 453 454 /* Check if a resource still fits in the total IO or M32 range 455 * for a given PHB 456 */ 457 static int __devinit pnv_ioda_resource_fit(struct pci_controller *hose, 458 struct resource *r) 459 { 460 struct resource *bounds; 461 462 if (r->flags & IORESOURCE_IO) 463 bounds = &hose->io_resource; 464 else if (r->flags & IORESOURCE_MEM) 465 bounds = &hose->mem_resources[0]; 466 else 467 return 1; 468 469 if (r->start >= bounds->start && r->end <= bounds->end) 470 return 1; 471 r->flags = 0; 472 return 0; 473 } 474 475 static void __devinit pnv_ioda_update_resources(struct pci_bus *bus) 476 { 477 struct pci_controller *hose = pci_bus_to_host(bus); 478 struct pci_bus *cbus; 479 struct pci_dev *cdev; 480 unsigned int i; 481 482 /* We used to clear all device enables here. However it looks like 483 * clearing MEM enable causes Obsidian (IPR SCS) to go bonkers, 484 * and shoot fatal errors to the PHB which in turns fences itself 485 * and we can't recover from that ... yet. So for now, let's leave 486 * the enables as-is and hope for the best. 487 */ 488 489 /* Check if bus resources fit in our IO or M32 range */ 490 for (i = 0; bus->self && (i < 2); i++) { 491 struct resource *r = bus->resource[i]; 492 if (r && !pnv_ioda_resource_fit(hose, r)) 493 pr_err("%s: Bus %d resource %d disabled, no room\n", 494 pci_name(bus->self), bus->number, i); 495 } 496 497 /* Update self if it's not a PHB */ 498 if (bus->self) 499 pci_setup_bridge(bus); 500 501 /* Update child devices */ 502 list_for_each_entry(cdev, &bus->devices, bus_list) { 503 /* Check if resource fits, if not, disabled it */ 504 for (i = 0; i <= PCI_ROM_RESOURCE; i++) { 505 struct resource *r = &cdev->resource[i]; 506 if (!pnv_ioda_resource_fit(hose, r)) 507 pr_err("%s: Resource %d disabled, no room\n", 508 pci_name(cdev), i); 509 } 510 511 /* Assign segments */ 512 pnv_ioda_setup_pe_segments(cdev); 513 514 /* Update HW BARs */ 515 for (i = 0; i <= PCI_ROM_RESOURCE; i++) 516 pci_update_resource(cdev, i); 517 } 518 519 /* Update child busses */ 520 list_for_each_entry(cbus, &bus->children, node) 521 pnv_ioda_update_resources(cbus); 522 } 523 524 static int __devinit pnv_ioda_alloc_pe(struct pnv_phb *phb) 525 { 526 unsigned long pe; 527 528 do { 529 pe = find_next_zero_bit(phb->ioda.pe_alloc, 530 phb->ioda.total_pe, 0); 531 if (pe >= phb->ioda.total_pe) 532 return IODA_INVALID_PE; 533 } while(test_and_set_bit(pe, phb->ioda.pe_alloc)); 534 535 phb->ioda.pe_array[pe].pe_number = pe; 536 return pe; 537 } 538 539 static void __devinit pnv_ioda_free_pe(struct pnv_phb *phb, int pe) 540 { 541 WARN_ON(phb->ioda.pe_array[pe].pdev); 542 543 memset(&phb->ioda.pe_array[pe], 0, sizeof(struct pnv_ioda_pe)); 544 clear_bit(pe, phb->ioda.pe_alloc); 545 } 546 547 /* Currently those 2 are only used when MSIs are enabled, this will change 548 * but in the meantime, we need to protect them to avoid warnings 549 */ 550 #ifdef CONFIG_PCI_MSI 551 static struct pnv_ioda_pe * __devinit __pnv_ioda_get_one_pe(struct pci_dev *dev) 552 { 553 struct pci_controller *hose = pci_bus_to_host(dev->bus); 554 struct pnv_phb *phb = hose->private_data; 555 struct pci_dn *pdn = pnv_ioda_get_pdn(dev); 556 557 if (!pdn) 558 return NULL; 559 if (pdn->pe_number == IODA_INVALID_PE) 560 return NULL; 561 return &phb->ioda.pe_array[pdn->pe_number]; 562 } 563 564 static struct pnv_ioda_pe * __devinit pnv_ioda_get_pe(struct pci_dev *dev) 565 { 566 struct pnv_ioda_pe *pe = __pnv_ioda_get_one_pe(dev); 567 568 while (!pe && dev->bus->self) { 569 dev = dev->bus->self; 570 pe = __pnv_ioda_get_one_pe(dev); 571 if (pe) 572 pe = pe->bus_pe; 573 } 574 return pe; 575 } 576 #endif /* CONFIG_PCI_MSI */ 577 578 static int __devinit pnv_ioda_configure_pe(struct pnv_phb *phb, 579 struct pnv_ioda_pe *pe) 580 { 581 struct pci_dev *parent; 582 uint8_t bcomp, dcomp, fcomp; 583 long rc, rid_end, rid; 584 585 /* Bus validation ? */ 586 if (pe->pbus) { 587 int count; 588 589 dcomp = OPAL_IGNORE_RID_DEVICE_NUMBER; 590 fcomp = OPAL_IGNORE_RID_FUNCTION_NUMBER; 591 parent = pe->pbus->self; 592 count = pe->pbus->busn_res.end - pe->pbus->busn_res.start + 1; 593 switch(count) { 594 case 1: bcomp = OpalPciBusAll; break; 595 case 2: bcomp = OpalPciBus7Bits; break; 596 case 4: bcomp = OpalPciBus6Bits; break; 597 case 8: bcomp = OpalPciBus5Bits; break; 598 case 16: bcomp = OpalPciBus4Bits; break; 599 case 32: bcomp = OpalPciBus3Bits; break; 600 default: 601 pr_err("%s: Number of subordinate busses %d" 602 " unsupported\n", 603 pci_name(pe->pbus->self), count); 604 /* Do an exact match only */ 605 bcomp = OpalPciBusAll; 606 } 607 rid_end = pe->rid + (count << 8); 608 } else { 609 parent = pe->pdev->bus->self; 610 bcomp = OpalPciBusAll; 611 dcomp = OPAL_COMPARE_RID_DEVICE_NUMBER; 612 fcomp = OPAL_COMPARE_RID_FUNCTION_NUMBER; 613 rid_end = pe->rid + 1; 614 } 615 616 /* Associate PE in PELT */ 617 rc = opal_pci_set_pe(phb->opal_id, pe->pe_number, pe->rid, 618 bcomp, dcomp, fcomp, OPAL_MAP_PE); 619 if (rc) { 620 pe_err(pe, "OPAL error %ld trying to setup PELT table\n", rc); 621 return -ENXIO; 622 } 623 opal_pci_eeh_freeze_clear(phb->opal_id, pe->pe_number, 624 OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); 625 626 /* Add to all parents PELT-V */ 627 while (parent) { 628 struct pci_dn *pdn = pnv_ioda_get_pdn(parent); 629 if (pdn && pdn->pe_number != IODA_INVALID_PE) { 630 rc = opal_pci_set_peltv(phb->opal_id, pdn->pe_number, 631 pe->pe_number, OPAL_ADD_PE_TO_DOMAIN); 632 /* XXX What to do in case of error ? */ 633 } 634 parent = parent->bus->self; 635 } 636 /* Setup reverse map */ 637 for (rid = pe->rid; rid < rid_end; rid++) 638 phb->ioda.pe_rmap[rid] = pe->pe_number; 639 640 /* Setup one MVTs on IODA1 */ 641 if (phb->type == PNV_PHB_IODA1) { 642 pe->mve_number = pe->pe_number; 643 rc = opal_pci_set_mve(phb->opal_id, pe->mve_number, 644 pe->pe_number); 645 if (rc) { 646 pe_err(pe, "OPAL error %ld setting up MVE %d\n", 647 rc, pe->mve_number); 648 pe->mve_number = -1; 649 } else { 650 rc = opal_pci_set_mve_enable(phb->opal_id, 651 pe->mve_number, OPAL_ENABLE_MVE); 652 if (rc) { 653 pe_err(pe, "OPAL error %ld enabling MVE %d\n", 654 rc, pe->mve_number); 655 pe->mve_number = -1; 656 } 657 } 658 } else if (phb->type == PNV_PHB_IODA2) 659 pe->mve_number = 0; 660 661 return 0; 662 } 663 664 static void __devinit pnv_ioda_link_pe_by_weight(struct pnv_phb *phb, 665 struct pnv_ioda_pe *pe) 666 { 667 struct pnv_ioda_pe *lpe; 668 669 list_for_each_entry(lpe, &phb->ioda.pe_list, link) { 670 if (lpe->dma_weight < pe->dma_weight) { 671 list_add_tail(&pe->link, &lpe->link); 672 return; 673 } 674 } 675 list_add_tail(&pe->link, &phb->ioda.pe_list); 676 } 677 678 static unsigned int pnv_ioda_dma_weight(struct pci_dev *dev) 679 { 680 /* This is quite simplistic. The "base" weight of a device 681 * is 10. 0 means no DMA is to be accounted for it. 682 */ 683 684 /* If it's a bridge, no DMA */ 685 if (dev->hdr_type != PCI_HEADER_TYPE_NORMAL) 686 return 0; 687 688 /* Reduce the weight of slow USB controllers */ 689 if (dev->class == PCI_CLASS_SERIAL_USB_UHCI || 690 dev->class == PCI_CLASS_SERIAL_USB_OHCI || 691 dev->class == PCI_CLASS_SERIAL_USB_EHCI) 692 return 3; 693 694 /* Increase the weight of RAID (includes Obsidian) */ 695 if ((dev->class >> 8) == PCI_CLASS_STORAGE_RAID) 696 return 15; 697 698 /* Default */ 699 return 10; 700 } 701 702 static struct pnv_ioda_pe * __devinit pnv_ioda_setup_dev_PE(struct pci_dev *dev) 703 { 704 struct pci_controller *hose = pci_bus_to_host(dev->bus); 705 struct pnv_phb *phb = hose->private_data; 706 struct pci_dn *pdn = pnv_ioda_get_pdn(dev); 707 struct pnv_ioda_pe *pe; 708 int pe_num; 709 710 if (!pdn) { 711 pr_err("%s: Device tree node not associated properly\n", 712 pci_name(dev)); 713 return NULL; 714 } 715 if (pdn->pe_number != IODA_INVALID_PE) 716 return NULL; 717 718 /* PE#0 has been pre-set */ 719 if (dev->bus->number == 0) 720 pe_num = 0; 721 else 722 pe_num = pnv_ioda_alloc_pe(phb); 723 if (pe_num == IODA_INVALID_PE) { 724 pr_warning("%s: Not enough PE# available, disabling device\n", 725 pci_name(dev)); 726 return NULL; 727 } 728 729 /* NOTE: We get only one ref to the pci_dev for the pdn, not for the 730 * pointer in the PE data structure, both should be destroyed at the 731 * same time. However, this needs to be looked at more closely again 732 * once we actually start removing things (Hotplug, SR-IOV, ...) 733 * 734 * At some point we want to remove the PDN completely anyways 735 */ 736 pe = &phb->ioda.pe_array[pe_num]; 737 pci_dev_get(dev); 738 pdn->pcidev = dev; 739 pdn->pe_number = pe_num; 740 pe->pdev = dev; 741 pe->pbus = NULL; 742 pe->tce32_seg = -1; 743 pe->mve_number = -1; 744 pe->rid = dev->bus->number << 8 | pdn->devfn; 745 746 pe_info(pe, "Associated device to PE\n"); 747 748 if (pnv_ioda_configure_pe(phb, pe)) { 749 /* XXX What do we do here ? */ 750 if (pe_num) 751 pnv_ioda_free_pe(phb, pe_num); 752 pdn->pe_number = IODA_INVALID_PE; 753 pe->pdev = NULL; 754 pci_dev_put(dev); 755 return NULL; 756 } 757 758 /* Assign a DMA weight to the device */ 759 pe->dma_weight = pnv_ioda_dma_weight(dev); 760 if (pe->dma_weight != 0) { 761 phb->ioda.dma_weight += pe->dma_weight; 762 phb->ioda.dma_pe_count++; 763 } 764 765 /* Link the PE */ 766 pnv_ioda_link_pe_by_weight(phb, pe); 767 768 return pe; 769 } 770 771 static void pnv_ioda_setup_same_PE(struct pci_bus *bus, struct pnv_ioda_pe *pe) 772 { 773 struct pci_dev *dev; 774 775 list_for_each_entry(dev, &bus->devices, bus_list) { 776 struct pci_dn *pdn = pnv_ioda_get_pdn(dev); 777 778 if (pdn == NULL) { 779 pr_warn("%s: No device node associated with device !\n", 780 pci_name(dev)); 781 continue; 782 } 783 pci_dev_get(dev); 784 pdn->pcidev = dev; 785 pdn->pe_number = pe->pe_number; 786 pe->dma_weight += pnv_ioda_dma_weight(dev); 787 if (dev->subordinate) 788 pnv_ioda_setup_same_PE(dev->subordinate, pe); 789 } 790 } 791 792 static void __devinit pnv_ioda_setup_bus_PE(struct pci_dev *dev, 793 struct pnv_ioda_pe *ppe) 794 { 795 struct pci_controller *hose = pci_bus_to_host(dev->bus); 796 struct pnv_phb *phb = hose->private_data; 797 struct pci_bus *bus = dev->subordinate; 798 struct pnv_ioda_pe *pe; 799 int pe_num; 800 801 if (!bus) { 802 pr_warning("%s: Bridge without a subordinate bus !\n", 803 pci_name(dev)); 804 return; 805 } 806 pe_num = pnv_ioda_alloc_pe(phb); 807 if (pe_num == IODA_INVALID_PE) { 808 pr_warning("%s: Not enough PE# available, disabling bus\n", 809 pci_name(dev)); 810 return; 811 } 812 813 pe = &phb->ioda.pe_array[pe_num]; 814 ppe->bus_pe = pe; 815 pe->pbus = bus; 816 pe->pdev = NULL; 817 pe->tce32_seg = -1; 818 pe->mve_number = -1; 819 pe->rid = bus->busn_res.start << 8; 820 pe->dma_weight = 0; 821 822 pe_info(pe, "Secondary busses %pR associated with PE\n", 823 &bus->busn_res); 824 825 if (pnv_ioda_configure_pe(phb, pe)) { 826 /* XXX What do we do here ? */ 827 if (pe_num) 828 pnv_ioda_free_pe(phb, pe_num); 829 pe->pbus = NULL; 830 return; 831 } 832 833 /* Associate it with all child devices */ 834 pnv_ioda_setup_same_PE(bus, pe); 835 836 /* Account for one DMA PE if at least one DMA capable device exist 837 * below the bridge 838 */ 839 if (pe->dma_weight != 0) { 840 phb->ioda.dma_weight += pe->dma_weight; 841 phb->ioda.dma_pe_count++; 842 } 843 844 /* Link the PE */ 845 pnv_ioda_link_pe_by_weight(phb, pe); 846 } 847 848 static void __devinit pnv_ioda_setup_PEs(struct pci_bus *bus) 849 { 850 struct pci_dev *dev; 851 struct pnv_ioda_pe *pe; 852 853 list_for_each_entry(dev, &bus->devices, bus_list) { 854 pe = pnv_ioda_setup_dev_PE(dev); 855 if (pe == NULL) 856 continue; 857 /* Leaving the PCIe domain ... single PE# */ 858 if (dev->pcie_type == PCI_EXP_TYPE_PCI_BRIDGE) 859 pnv_ioda_setup_bus_PE(dev, pe); 860 else if (dev->subordinate) 861 pnv_ioda_setup_PEs(dev->subordinate); 862 } 863 } 864 865 static void __devinit pnv_pci_ioda_dma_dev_setup(struct pnv_phb *phb, 866 struct pci_dev *dev) 867 { 868 /* We delay DMA setup after we have assigned all PE# */ 869 } 870 871 static void __devinit pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe, 872 struct pci_bus *bus) 873 { 874 struct pci_dev *dev; 875 876 list_for_each_entry(dev, &bus->devices, bus_list) { 877 set_iommu_table_base(&dev->dev, &pe->tce32_table); 878 if (dev->subordinate) 879 pnv_ioda_setup_bus_dma(pe, dev->subordinate); 880 } 881 } 882 883 static void __devinit pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb, 884 struct pnv_ioda_pe *pe, 885 unsigned int base, 886 unsigned int segs) 887 { 888 889 struct page *tce_mem = NULL; 890 const __be64 *swinvp; 891 struct iommu_table *tbl; 892 unsigned int i; 893 int64_t rc; 894 void *addr; 895 896 /* 256M DMA window, 4K TCE pages, 8 bytes TCE */ 897 #define TCE32_TABLE_SIZE ((0x10000000 / 0x1000) * 8) 898 899 /* XXX FIXME: Handle 64-bit only DMA devices */ 900 /* XXX FIXME: Provide 64-bit DMA facilities & non-4K TCE tables etc.. */ 901 /* XXX FIXME: Allocate multi-level tables on PHB3 */ 902 903 /* We shouldn't already have a 32-bit DMA associated */ 904 if (WARN_ON(pe->tce32_seg >= 0)) 905 return; 906 907 /* Grab a 32-bit TCE table */ 908 pe->tce32_seg = base; 909 pe_info(pe, " Setting up 32-bit TCE table at %08x..%08x\n", 910 (base << 28), ((base + segs) << 28) - 1); 911 912 /* XXX Currently, we allocate one big contiguous table for the 913 * TCEs. We only really need one chunk per 256M of TCE space 914 * (ie per segment) but that's an optimization for later, it 915 * requires some added smarts with our get/put_tce implementation 916 */ 917 tce_mem = alloc_pages_node(phb->hose->node, GFP_KERNEL, 918 get_order(TCE32_TABLE_SIZE * segs)); 919 if (!tce_mem) { 920 pe_err(pe, " Failed to allocate a 32-bit TCE memory\n"); 921 goto fail; 922 } 923 addr = page_address(tce_mem); 924 memset(addr, 0, TCE32_TABLE_SIZE * segs); 925 926 /* Configure HW */ 927 for (i = 0; i < segs; i++) { 928 rc = opal_pci_map_pe_dma_window(phb->opal_id, 929 pe->pe_number, 930 base + i, 1, 931 __pa(addr) + TCE32_TABLE_SIZE * i, 932 TCE32_TABLE_SIZE, 0x1000); 933 if (rc) { 934 pe_err(pe, " Failed to configure 32-bit TCE table," 935 " err %ld\n", rc); 936 goto fail; 937 } 938 } 939 940 /* Setup linux iommu table */ 941 tbl = &pe->tce32_table; 942 pnv_pci_setup_iommu_table(tbl, addr, TCE32_TABLE_SIZE * segs, 943 base << 28); 944 945 /* OPAL variant of P7IOC SW invalidated TCEs */ 946 swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL); 947 if (swinvp) { 948 /* We need a couple more fields -- an address and a data 949 * to or. Since the bus is only printed out on table free 950 * errors, and on the first pass the data will be a relative 951 * bus number, print that out instead. 952 */ 953 tbl->it_busno = 0; 954 tbl->it_index = (unsigned long)ioremap(be64_to_cpup(swinvp), 8); 955 tbl->it_type = TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE 956 | TCE_PCI_SWINV_PAIR; 957 } 958 iommu_init_table(tbl, phb->hose->node); 959 960 if (pe->pdev) 961 set_iommu_table_base(&pe->pdev->dev, tbl); 962 else 963 pnv_ioda_setup_bus_dma(pe, pe->pbus); 964 965 return; 966 fail: 967 /* XXX Failure: Try to fallback to 64-bit only ? */ 968 if (pe->tce32_seg >= 0) 969 pe->tce32_seg = -1; 970 if (tce_mem) 971 __free_pages(tce_mem, get_order(TCE32_TABLE_SIZE * segs)); 972 } 973 974 static void __devinit pnv_ioda_setup_dma(struct pnv_phb *phb) 975 { 976 struct pci_controller *hose = phb->hose; 977 unsigned int residual, remaining, segs, tw, base; 978 struct pnv_ioda_pe *pe; 979 980 /* If we have more PE# than segments available, hand out one 981 * per PE until we run out and let the rest fail. If not, 982 * then we assign at least one segment per PE, plus more based 983 * on the amount of devices under that PE 984 */ 985 if (phb->ioda.dma_pe_count > phb->ioda.tce32_count) 986 residual = 0; 987 else 988 residual = phb->ioda.tce32_count - 989 phb->ioda.dma_pe_count; 990 991 pr_info("PCI: Domain %04x has %ld available 32-bit DMA segments\n", 992 hose->global_number, phb->ioda.tce32_count); 993 pr_info("PCI: %d PE# for a total weight of %d\n", 994 phb->ioda.dma_pe_count, phb->ioda.dma_weight); 995 996 /* Walk our PE list and configure their DMA segments, hand them 997 * out one base segment plus any residual segments based on 998 * weight 999 */ 1000 remaining = phb->ioda.tce32_count; 1001 tw = phb->ioda.dma_weight; 1002 base = 0; 1003 list_for_each_entry(pe, &phb->ioda.pe_list, link) { 1004 if (!pe->dma_weight) 1005 continue; 1006 if (!remaining) { 1007 pe_warn(pe, "No DMA32 resources available\n"); 1008 continue; 1009 } 1010 segs = 1; 1011 if (residual) { 1012 segs += ((pe->dma_weight * residual) + (tw / 2)) / tw; 1013 if (segs > remaining) 1014 segs = remaining; 1015 } 1016 pe_info(pe, "DMA weight %d, assigned %d DMA32 segments\n", 1017 pe->dma_weight, segs); 1018 pnv_pci_ioda_setup_dma_pe(phb, pe, base, segs); 1019 remaining -= segs; 1020 base += segs; 1021 } 1022 } 1023 1024 #ifdef CONFIG_PCI_MSI 1025 static int pnv_pci_ioda_msi_setup(struct pnv_phb *phb, struct pci_dev *dev, 1026 unsigned int hwirq, unsigned int is_64, 1027 struct msi_msg *msg) 1028 { 1029 struct pnv_ioda_pe *pe = pnv_ioda_get_pe(dev); 1030 unsigned int xive_num = hwirq - phb->msi_base; 1031 uint64_t addr64; 1032 uint32_t addr32, data; 1033 int rc; 1034 1035 /* No PE assigned ? bail out ... no MSI for you ! */ 1036 if (pe == NULL) 1037 return -ENXIO; 1038 1039 /* Check if we have an MVE */ 1040 if (pe->mve_number < 0) 1041 return -ENXIO; 1042 1043 /* Assign XIVE to PE */ 1044 rc = opal_pci_set_xive_pe(phb->opal_id, pe->pe_number, xive_num); 1045 if (rc) { 1046 pr_warn("%s: OPAL error %d setting XIVE %d PE\n", 1047 pci_name(dev), rc, xive_num); 1048 return -EIO; 1049 } 1050 1051 if (is_64) { 1052 rc = opal_get_msi_64(phb->opal_id, pe->mve_number, xive_num, 1, 1053 &addr64, &data); 1054 if (rc) { 1055 pr_warn("%s: OPAL error %d getting 64-bit MSI data\n", 1056 pci_name(dev), rc); 1057 return -EIO; 1058 } 1059 msg->address_hi = addr64 >> 32; 1060 msg->address_lo = addr64 & 0xfffffffful; 1061 } else { 1062 rc = opal_get_msi_32(phb->opal_id, pe->mve_number, xive_num, 1, 1063 &addr32, &data); 1064 if (rc) { 1065 pr_warn("%s: OPAL error %d getting 32-bit MSI data\n", 1066 pci_name(dev), rc); 1067 return -EIO; 1068 } 1069 msg->address_hi = 0; 1070 msg->address_lo = addr32; 1071 } 1072 msg->data = data; 1073 1074 pr_devel("%s: %s-bit MSI on hwirq %x (xive #%d)," 1075 " address=%x_%08x data=%x PE# %d\n", 1076 pci_name(dev), is_64 ? "64" : "32", hwirq, xive_num, 1077 msg->address_hi, msg->address_lo, data, pe->pe_number); 1078 1079 return 0; 1080 } 1081 1082 static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) 1083 { 1084 unsigned int bmap_size; 1085 const __be32 *prop = of_get_property(phb->hose->dn, 1086 "ibm,opal-msi-ranges", NULL); 1087 if (!prop) { 1088 /* BML Fallback */ 1089 prop = of_get_property(phb->hose->dn, "msi-ranges", NULL); 1090 } 1091 if (!prop) 1092 return; 1093 1094 phb->msi_base = be32_to_cpup(prop); 1095 phb->msi_count = be32_to_cpup(prop + 1); 1096 bmap_size = BITS_TO_LONGS(phb->msi_count) * sizeof(unsigned long); 1097 phb->msi_map = zalloc_maybe_bootmem(bmap_size, GFP_KERNEL); 1098 if (!phb->msi_map) { 1099 pr_err("PCI %d: Failed to allocate MSI bitmap !\n", 1100 phb->hose->global_number); 1101 return; 1102 } 1103 phb->msi_setup = pnv_pci_ioda_msi_setup; 1104 phb->msi32_support = 1; 1105 pr_info(" Allocated bitmap for %d MSIs (base IRQ 0x%x)\n", 1106 phb->msi_count, phb->msi_base); 1107 } 1108 #else 1109 static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) { } 1110 #endif /* CONFIG_PCI_MSI */ 1111 1112 /* This is the starting point of our IODA specific resource 1113 * allocation process 1114 */ 1115 static void __devinit pnv_pci_ioda_fixup_phb(struct pci_controller *hose) 1116 { 1117 resource_size_t size, align; 1118 struct pci_bus *child; 1119 1120 /* Associate PEs per functions */ 1121 pnv_ioda_setup_PEs(hose->bus); 1122 1123 /* Calculate all resources */ 1124 pnv_ioda_calc_bus(hose->bus, IORESOURCE_IO, &size, &align); 1125 pnv_ioda_calc_bus(hose->bus, IORESOURCE_MEM, &size, &align); 1126 1127 /* Apply then to HW */ 1128 pnv_ioda_update_resources(hose->bus); 1129 1130 /* Setup DMA */ 1131 pnv_ioda_setup_dma(hose->private_data); 1132 1133 /* Configure PCI Express settings */ 1134 list_for_each_entry(child, &hose->bus->children, node) { 1135 struct pci_dev *self = child->self; 1136 if (!self) 1137 continue; 1138 pcie_bus_configure_settings(child, self->pcie_mpss); 1139 } 1140 } 1141 1142 /* Prevent enabling devices for which we couldn't properly 1143 * assign a PE 1144 */ 1145 static int __devinit pnv_pci_enable_device_hook(struct pci_dev *dev) 1146 { 1147 struct pci_dn *pdn = pnv_ioda_get_pdn(dev); 1148 1149 if (!pdn || pdn->pe_number == IODA_INVALID_PE) 1150 return -EINVAL; 1151 return 0; 1152 } 1153 1154 static u32 pnv_ioda_bdfn_to_pe(struct pnv_phb *phb, struct pci_bus *bus, 1155 u32 devfn) 1156 { 1157 return phb->ioda.pe_rmap[(bus->number << 8) | devfn]; 1158 } 1159 1160 void __init pnv_pci_init_ioda1_phb(struct device_node *np) 1161 { 1162 struct pci_controller *hose; 1163 static int primary = 1; 1164 struct pnv_phb *phb; 1165 unsigned long size, m32map_off, iomap_off, pemap_off; 1166 const u64 *prop64; 1167 u64 phb_id; 1168 void *aux; 1169 long rc; 1170 1171 pr_info(" Initializing IODA OPAL PHB %s\n", np->full_name); 1172 1173 prop64 = of_get_property(np, "ibm,opal-phbid", NULL); 1174 if (!prop64) { 1175 pr_err(" Missing \"ibm,opal-phbid\" property !\n"); 1176 return; 1177 } 1178 phb_id = be64_to_cpup(prop64); 1179 pr_debug(" PHB-ID : 0x%016llx\n", phb_id); 1180 1181 phb = alloc_bootmem(sizeof(struct pnv_phb)); 1182 if (phb) { 1183 memset(phb, 0, sizeof(struct pnv_phb)); 1184 phb->hose = hose = pcibios_alloc_controller(np); 1185 } 1186 if (!phb || !phb->hose) { 1187 pr_err("PCI: Failed to allocate PCI controller for %s\n", 1188 np->full_name); 1189 return; 1190 } 1191 1192 spin_lock_init(&phb->lock); 1193 /* XXX Use device-tree */ 1194 hose->first_busno = 0; 1195 hose->last_busno = 0xff; 1196 hose->private_data = phb; 1197 phb->opal_id = phb_id; 1198 phb->type = PNV_PHB_IODA1; 1199 1200 /* Detect specific models for error handling */ 1201 if (of_device_is_compatible(np, "ibm,p7ioc-pciex")) 1202 phb->model = PNV_PHB_MODEL_P7IOC; 1203 else 1204 phb->model = PNV_PHB_MODEL_UNKNOWN; 1205 1206 /* We parse "ranges" now since we need to deduce the register base 1207 * from the IO base 1208 */ 1209 pci_process_bridge_OF_ranges(phb->hose, np, primary); 1210 primary = 0; 1211 1212 /* Magic formula from Milton */ 1213 phb->regs = of_iomap(np, 0); 1214 if (phb->regs == NULL) 1215 pr_err(" Failed to map registers !\n"); 1216 1217 1218 /* XXX This is hack-a-thon. This needs to be changed so that: 1219 * - we obtain stuff like PE# etc... from device-tree 1220 * - we properly re-allocate M32 ourselves 1221 * (the OFW one isn't very good) 1222 */ 1223 1224 /* Initialize more IODA stuff */ 1225 phb->ioda.total_pe = 128; 1226 1227 phb->ioda.m32_size = resource_size(&hose->mem_resources[0]); 1228 /* OFW Has already off top 64k of M32 space (MSI space) */ 1229 phb->ioda.m32_size += 0x10000; 1230 1231 phb->ioda.m32_segsize = phb->ioda.m32_size / phb->ioda.total_pe; 1232 phb->ioda.m32_pci_base = hose->mem_resources[0].start - 1233 hose->pci_mem_offset; 1234 phb->ioda.io_size = hose->pci_io_size; 1235 phb->ioda.io_segsize = phb->ioda.io_size / phb->ioda.total_pe; 1236 phb->ioda.io_pci_base = 0; /* XXX calculate this ? */ 1237 1238 /* Allocate aux data & arrays */ 1239 size = _ALIGN_UP(phb->ioda.total_pe / 8, sizeof(unsigned long)); 1240 m32map_off = size; 1241 size += phb->ioda.total_pe; 1242 iomap_off = size; 1243 size += phb->ioda.total_pe; 1244 pemap_off = size; 1245 size += phb->ioda.total_pe * sizeof(struct pnv_ioda_pe); 1246 aux = alloc_bootmem(size); 1247 memset(aux, 0, size); 1248 phb->ioda.pe_alloc = aux; 1249 phb->ioda.m32_segmap = aux + m32map_off; 1250 phb->ioda.io_segmap = aux + iomap_off; 1251 phb->ioda.pe_array = aux + pemap_off; 1252 set_bit(0, phb->ioda.pe_alloc); 1253 1254 INIT_LIST_HEAD(&phb->ioda.pe_list); 1255 1256 /* Calculate how many 32-bit TCE segments we have */ 1257 phb->ioda.tce32_count = phb->ioda.m32_pci_base >> 28; 1258 1259 /* Clear unusable m64 */ 1260 hose->mem_resources[1].flags = 0; 1261 hose->mem_resources[1].start = 0; 1262 hose->mem_resources[1].end = 0; 1263 hose->mem_resources[2].flags = 0; 1264 hose->mem_resources[2].start = 0; 1265 hose->mem_resources[2].end = 0; 1266 1267 #if 0 1268 rc = opal_pci_set_phb_mem_window(opal->phb_id, 1269 window_type, 1270 window_num, 1271 starting_real_address, 1272 starting_pci_address, 1273 segment_size); 1274 #endif 1275 1276 pr_info(" %d PE's M32: 0x%x [segment=0x%x] IO: 0x%x [segment=0x%x]\n", 1277 phb->ioda.total_pe, 1278 phb->ioda.m32_size, phb->ioda.m32_segsize, 1279 phb->ioda.io_size, phb->ioda.io_segsize); 1280 1281 if (phb->regs) { 1282 pr_devel(" BUID = 0x%016llx\n", in_be64(phb->regs + 0x100)); 1283 pr_devel(" PHB2_CR = 0x%016llx\n", in_be64(phb->regs + 0x160)); 1284 pr_devel(" IO_BAR = 0x%016llx\n", in_be64(phb->regs + 0x170)); 1285 pr_devel(" IO_BAMR = 0x%016llx\n", in_be64(phb->regs + 0x178)); 1286 pr_devel(" IO_SAR = 0x%016llx\n", in_be64(phb->regs + 0x180)); 1287 pr_devel(" M32_BAR = 0x%016llx\n", in_be64(phb->regs + 0x190)); 1288 pr_devel(" M32_BAMR = 0x%016llx\n", in_be64(phb->regs + 0x198)); 1289 pr_devel(" M32_SAR = 0x%016llx\n", in_be64(phb->regs + 0x1a0)); 1290 } 1291 phb->hose->ops = &pnv_pci_ops; 1292 1293 /* Setup RID -> PE mapping function */ 1294 phb->bdfn_to_pe = pnv_ioda_bdfn_to_pe; 1295 1296 /* Setup TCEs */ 1297 phb->dma_dev_setup = pnv_pci_ioda_dma_dev_setup; 1298 1299 /* Setup MSI support */ 1300 pnv_pci_init_ioda_msis(phb); 1301 1302 /* We set both PCI_PROBE_ONLY and PCI_REASSIGN_ALL_RSRC. This is an 1303 * odd combination which essentially means that we skip all resource 1304 * fixups and assignments in the generic code, and do it all 1305 * ourselves here 1306 */ 1307 ppc_md.pcibios_fixup_phb = pnv_pci_ioda_fixup_phb; 1308 ppc_md.pcibios_enable_device_hook = pnv_pci_enable_device_hook; 1309 pci_add_flags(PCI_PROBE_ONLY | PCI_REASSIGN_ALL_RSRC); 1310 1311 /* Reset IODA tables to a clean state */ 1312 rc = opal_pci_reset(phb_id, OPAL_PCI_IODA_TABLE_RESET, OPAL_ASSERT_RESET); 1313 if (rc) 1314 pr_warning(" OPAL Error %ld performing IODA table reset !\n", rc); 1315 opal_pci_set_pe(phb_id, 0, 0, 7, 1, 1 , OPAL_MAP_PE); 1316 } 1317 1318 void __init pnv_pci_init_ioda_hub(struct device_node *np) 1319 { 1320 struct device_node *phbn; 1321 const u64 *prop64; 1322 u64 hub_id; 1323 1324 pr_info("Probing IODA IO-Hub %s\n", np->full_name); 1325 1326 prop64 = of_get_property(np, "ibm,opal-hubid", NULL); 1327 if (!prop64) { 1328 pr_err(" Missing \"ibm,opal-hubid\" property !\n"); 1329 return; 1330 } 1331 hub_id = be64_to_cpup(prop64); 1332 pr_devel(" HUB-ID : 0x%016llx\n", hub_id); 1333 1334 /* Count child PHBs */ 1335 for_each_child_of_node(np, phbn) { 1336 /* Look for IODA1 PHBs */ 1337 if (of_device_is_compatible(phbn, "ibm,ioda-phb")) 1338 pnv_pci_init_ioda1_phb(phbn); 1339 } 1340 } 1341