1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Synopsys DesignWare PCIe host controller driver 4 * 5 * Copyright (C) 2013 Samsung Electronics Co., Ltd. 6 * http://www.samsung.com 7 * 8 * Author: Jingoo Han <jg1.han@samsung.com> 9 */ 10 11 #include <linux/irqchip/chained_irq.h> 12 #include <linux/irqdomain.h> 13 #include <linux/of_address.h> 14 #include <linux/of_pci.h> 15 #include <linux/pci_regs.h> 16 #include <linux/platform_device.h> 17 18 #include "../../pci.h" 19 #include "pcie-designware.h" 20 21 static struct pci_ops dw_pcie_ops; 22 23 static int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size, 24 u32 *val) 25 { 26 struct dw_pcie *pci; 27 28 if (pp->ops->rd_own_conf) 29 return pp->ops->rd_own_conf(pp, where, size, val); 30 31 pci = to_dw_pcie_from_pp(pp); 32 return dw_pcie_read(pci->dbi_base + where, size, val); 33 } 34 35 static int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size, 36 u32 val) 37 { 38 struct dw_pcie *pci; 39 40 if (pp->ops->wr_own_conf) 41 return pp->ops->wr_own_conf(pp, where, size, val); 42 43 pci = to_dw_pcie_from_pp(pp); 44 return dw_pcie_write(pci->dbi_base + where, size, val); 45 } 46 47 static void dw_msi_ack_irq(struct irq_data *d) 48 { 49 irq_chip_ack_parent(d); 50 } 51 52 static void dw_msi_mask_irq(struct irq_data *d) 53 { 54 pci_msi_mask_irq(d); 55 irq_chip_mask_parent(d); 56 } 57 58 static void dw_msi_unmask_irq(struct irq_data *d) 59 { 60 pci_msi_unmask_irq(d); 61 irq_chip_unmask_parent(d); 62 } 63 64 static struct irq_chip dw_pcie_msi_irq_chip = { 65 .name = "PCI-MSI", 66 .irq_ack = dw_msi_ack_irq, 67 .irq_mask = dw_msi_mask_irq, 68 .irq_unmask = dw_msi_unmask_irq, 69 }; 70 71 static struct msi_domain_info dw_pcie_msi_domain_info = { 72 .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | 73 MSI_FLAG_PCI_MSIX | MSI_FLAG_MULTI_PCI_MSI), 74 .chip = &dw_pcie_msi_irq_chip, 75 }; 76 77 /* MSI int handler */ 78 irqreturn_t dw_handle_msi_irq(struct pcie_port *pp) 79 { 80 int i, pos, irq; 81 u32 val, num_ctrls; 82 irqreturn_t ret = IRQ_NONE; 83 84 num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL; 85 86 for (i = 0; i < num_ctrls; i++) { 87 dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_STATUS + 88 (i * MSI_REG_CTRL_BLOCK_SIZE), 89 4, &val); 90 if (!val) 91 continue; 92 93 ret = IRQ_HANDLED; 94 pos = 0; 95 while ((pos = find_next_bit((unsigned long *) &val, 96 MAX_MSI_IRQS_PER_CTRL, 97 pos)) != MAX_MSI_IRQS_PER_CTRL) { 98 irq = irq_find_mapping(pp->irq_domain, 99 (i * MAX_MSI_IRQS_PER_CTRL) + 100 pos); 101 generic_handle_irq(irq); 102 dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_STATUS + 103 (i * MSI_REG_CTRL_BLOCK_SIZE), 104 4, 1 << pos); 105 pos++; 106 } 107 } 108 109 return ret; 110 } 111 112 /* Chained MSI interrupt service routine */ 113 static void dw_chained_msi_isr(struct irq_desc *desc) 114 { 115 struct irq_chip *chip = irq_desc_get_chip(desc); 116 struct pcie_port *pp; 117 118 chained_irq_enter(chip, desc); 119 120 pp = irq_desc_get_handler_data(desc); 121 dw_handle_msi_irq(pp); 122 123 chained_irq_exit(chip, desc); 124 } 125 126 static void dw_pci_setup_msi_msg(struct irq_data *data, struct msi_msg *msg) 127 { 128 struct pcie_port *pp = irq_data_get_irq_chip_data(data); 129 struct dw_pcie *pci = to_dw_pcie_from_pp(pp); 130 u64 msi_target; 131 132 if (pp->ops->get_msi_addr) 133 msi_target = pp->ops->get_msi_addr(pp); 134 else 135 msi_target = (u64)pp->msi_data; 136 137 msg->address_lo = lower_32_bits(msi_target); 138 msg->address_hi = upper_32_bits(msi_target); 139 140 if (pp->ops->get_msi_data) 141 msg->data = pp->ops->get_msi_data(pp, data->hwirq); 142 else 143 msg->data = data->hwirq; 144 145 dev_dbg(pci->dev, "msi#%d address_hi %#x address_lo %#x\n", 146 (int)data->hwirq, msg->address_hi, msg->address_lo); 147 } 148 149 static int dw_pci_msi_set_affinity(struct irq_data *irq_data, 150 const struct cpumask *mask, bool force) 151 { 152 return -EINVAL; 153 } 154 155 static void dw_pci_bottom_mask(struct irq_data *data) 156 { 157 struct pcie_port *pp = irq_data_get_irq_chip_data(data); 158 unsigned int res, bit, ctrl; 159 unsigned long flags; 160 161 raw_spin_lock_irqsave(&pp->lock, flags); 162 163 if (pp->ops->msi_clear_irq) { 164 pp->ops->msi_clear_irq(pp, data->hwirq); 165 } else { 166 ctrl = data->hwirq / MAX_MSI_IRQS_PER_CTRL; 167 res = ctrl * MSI_REG_CTRL_BLOCK_SIZE; 168 bit = data->hwirq % MAX_MSI_IRQS_PER_CTRL; 169 170 pp->irq_status[ctrl] &= ~(1 << bit); 171 dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, 172 pp->irq_status[ctrl]); 173 } 174 175 raw_spin_unlock_irqrestore(&pp->lock, flags); 176 } 177 178 static void dw_pci_bottom_unmask(struct irq_data *data) 179 { 180 struct pcie_port *pp = irq_data_get_irq_chip_data(data); 181 unsigned int res, bit, ctrl; 182 unsigned long flags; 183 184 raw_spin_lock_irqsave(&pp->lock, flags); 185 186 if (pp->ops->msi_set_irq) { 187 pp->ops->msi_set_irq(pp, data->hwirq); 188 } else { 189 ctrl = data->hwirq / MAX_MSI_IRQS_PER_CTRL; 190 res = ctrl * MSI_REG_CTRL_BLOCK_SIZE; 191 bit = data->hwirq % MAX_MSI_IRQS_PER_CTRL; 192 193 pp->irq_status[ctrl] |= 1 << bit; 194 dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, 195 pp->irq_status[ctrl]); 196 } 197 198 raw_spin_unlock_irqrestore(&pp->lock, flags); 199 } 200 201 static void dw_pci_bottom_ack(struct irq_data *d) 202 { 203 struct msi_desc *msi = irq_data_get_msi_desc(d); 204 struct pcie_port *pp; 205 206 pp = msi_desc_to_pci_sysdata(msi); 207 208 if (pp->ops->msi_irq_ack) 209 pp->ops->msi_irq_ack(d->hwirq, pp); 210 } 211 212 static struct irq_chip dw_pci_msi_bottom_irq_chip = { 213 .name = "DWPCI-MSI", 214 .irq_ack = dw_pci_bottom_ack, 215 .irq_compose_msi_msg = dw_pci_setup_msi_msg, 216 .irq_set_affinity = dw_pci_msi_set_affinity, 217 .irq_mask = dw_pci_bottom_mask, 218 .irq_unmask = dw_pci_bottom_unmask, 219 }; 220 221 static int dw_pcie_irq_domain_alloc(struct irq_domain *domain, 222 unsigned int virq, unsigned int nr_irqs, 223 void *args) 224 { 225 struct pcie_port *pp = domain->host_data; 226 unsigned long flags; 227 u32 i; 228 int bit; 229 230 raw_spin_lock_irqsave(&pp->lock, flags); 231 232 bit = bitmap_find_free_region(pp->msi_irq_in_use, pp->num_vectors, 233 order_base_2(nr_irqs)); 234 235 raw_spin_unlock_irqrestore(&pp->lock, flags); 236 237 if (bit < 0) 238 return -ENOSPC; 239 240 for (i = 0; i < nr_irqs; i++) 241 irq_domain_set_info(domain, virq + i, bit + i, 242 &dw_pci_msi_bottom_irq_chip, 243 pp, handle_edge_irq, 244 NULL, NULL); 245 246 return 0; 247 } 248 249 static void dw_pcie_irq_domain_free(struct irq_domain *domain, 250 unsigned int virq, unsigned int nr_irqs) 251 { 252 struct irq_data *data = irq_domain_get_irq_data(domain, virq); 253 struct pcie_port *pp = irq_data_get_irq_chip_data(data); 254 unsigned long flags; 255 256 raw_spin_lock_irqsave(&pp->lock, flags); 257 258 bitmap_release_region(pp->msi_irq_in_use, data->hwirq, 259 order_base_2(nr_irqs)); 260 261 raw_spin_unlock_irqrestore(&pp->lock, flags); 262 } 263 264 static const struct irq_domain_ops dw_pcie_msi_domain_ops = { 265 .alloc = dw_pcie_irq_domain_alloc, 266 .free = dw_pcie_irq_domain_free, 267 }; 268 269 int dw_pcie_allocate_domains(struct pcie_port *pp) 270 { 271 struct dw_pcie *pci = to_dw_pcie_from_pp(pp); 272 struct fwnode_handle *fwnode = of_node_to_fwnode(pci->dev->of_node); 273 274 pp->irq_domain = irq_domain_create_linear(fwnode, pp->num_vectors, 275 &dw_pcie_msi_domain_ops, pp); 276 if (!pp->irq_domain) { 277 dev_err(pci->dev, "Failed to create IRQ domain\n"); 278 return -ENOMEM; 279 } 280 281 pp->msi_domain = pci_msi_create_irq_domain(fwnode, 282 &dw_pcie_msi_domain_info, 283 pp->irq_domain); 284 if (!pp->msi_domain) { 285 dev_err(pci->dev, "Failed to create MSI domain\n"); 286 irq_domain_remove(pp->irq_domain); 287 return -ENOMEM; 288 } 289 290 return 0; 291 } 292 293 void dw_pcie_free_msi(struct pcie_port *pp) 294 { 295 irq_set_chained_handler(pp->msi_irq, NULL); 296 irq_set_handler_data(pp->msi_irq, NULL); 297 298 irq_domain_remove(pp->msi_domain); 299 irq_domain_remove(pp->irq_domain); 300 } 301 302 void dw_pcie_msi_init(struct pcie_port *pp) 303 { 304 struct dw_pcie *pci = to_dw_pcie_from_pp(pp); 305 struct device *dev = pci->dev; 306 struct page *page; 307 u64 msi_target; 308 309 page = alloc_page(GFP_KERNEL); 310 pp->msi_data = dma_map_page(dev, page, 0, PAGE_SIZE, DMA_FROM_DEVICE); 311 if (dma_mapping_error(dev, pp->msi_data)) { 312 dev_err(dev, "Failed to map MSI data\n"); 313 __free_page(page); 314 return; 315 } 316 msi_target = (u64)pp->msi_data; 317 318 /* Program the msi_data */ 319 dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4, 320 lower_32_bits(msi_target)); 321 dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4, 322 upper_32_bits(msi_target)); 323 } 324 325 int dw_pcie_host_init(struct pcie_port *pp) 326 { 327 struct dw_pcie *pci = to_dw_pcie_from_pp(pp); 328 struct device *dev = pci->dev; 329 struct device_node *np = dev->of_node; 330 struct platform_device *pdev = to_platform_device(dev); 331 struct resource_entry *win, *tmp; 332 struct pci_bus *bus, *child; 333 struct pci_host_bridge *bridge; 334 struct resource *cfg_res; 335 int ret; 336 337 raw_spin_lock_init(&pci->pp.lock); 338 339 cfg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config"); 340 if (cfg_res) { 341 pp->cfg0_size = resource_size(cfg_res) >> 1; 342 pp->cfg1_size = resource_size(cfg_res) >> 1; 343 pp->cfg0_base = cfg_res->start; 344 pp->cfg1_base = cfg_res->start + pp->cfg0_size; 345 } else if (!pp->va_cfg0_base) { 346 dev_err(dev, "Missing *config* reg space\n"); 347 } 348 349 bridge = pci_alloc_host_bridge(0); 350 if (!bridge) 351 return -ENOMEM; 352 353 ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, 354 &bridge->windows, &pp->io_base); 355 if (ret) 356 return ret; 357 358 ret = devm_request_pci_bus_resources(dev, &bridge->windows); 359 if (ret) 360 goto error; 361 362 /* Get the I/O and memory ranges from DT */ 363 resource_list_for_each_entry_safe(win, tmp, &bridge->windows) { 364 switch (resource_type(win->res)) { 365 case IORESOURCE_IO: 366 ret = pci_remap_iospace(win->res, pp->io_base); 367 if (ret) { 368 dev_warn(dev, "Error %d: failed to map resource %pR\n", 369 ret, win->res); 370 resource_list_destroy_entry(win); 371 } else { 372 pp->io = win->res; 373 pp->io->name = "I/O"; 374 pp->io_size = resource_size(pp->io); 375 pp->io_bus_addr = pp->io->start - win->offset; 376 } 377 break; 378 case IORESOURCE_MEM: 379 pp->mem = win->res; 380 pp->mem->name = "MEM"; 381 pp->mem_size = resource_size(pp->mem); 382 pp->mem_bus_addr = pp->mem->start - win->offset; 383 break; 384 case 0: 385 pp->cfg = win->res; 386 pp->cfg0_size = resource_size(pp->cfg) >> 1; 387 pp->cfg1_size = resource_size(pp->cfg) >> 1; 388 pp->cfg0_base = pp->cfg->start; 389 pp->cfg1_base = pp->cfg->start + pp->cfg0_size; 390 break; 391 case IORESOURCE_BUS: 392 pp->busn = win->res; 393 break; 394 } 395 } 396 397 if (!pci->dbi_base) { 398 pci->dbi_base = devm_pci_remap_cfgspace(dev, 399 pp->cfg->start, 400 resource_size(pp->cfg)); 401 if (!pci->dbi_base) { 402 dev_err(dev, "Error with ioremap\n"); 403 ret = -ENOMEM; 404 goto error; 405 } 406 } 407 408 pp->mem_base = pp->mem->start; 409 410 if (!pp->va_cfg0_base) { 411 pp->va_cfg0_base = devm_pci_remap_cfgspace(dev, 412 pp->cfg0_base, pp->cfg0_size); 413 if (!pp->va_cfg0_base) { 414 dev_err(dev, "Error with ioremap in function\n"); 415 ret = -ENOMEM; 416 goto error; 417 } 418 } 419 420 if (!pp->va_cfg1_base) { 421 pp->va_cfg1_base = devm_pci_remap_cfgspace(dev, 422 pp->cfg1_base, 423 pp->cfg1_size); 424 if (!pp->va_cfg1_base) { 425 dev_err(dev, "Error with ioremap\n"); 426 ret = -ENOMEM; 427 goto error; 428 } 429 } 430 431 ret = of_property_read_u32(np, "num-viewport", &pci->num_viewport); 432 if (ret) 433 pci->num_viewport = 2; 434 435 if (IS_ENABLED(CONFIG_PCI_MSI)) { 436 /* 437 * If a specific SoC driver needs to change the 438 * default number of vectors, it needs to implement 439 * the set_num_vectors callback. 440 */ 441 if (!pp->ops->set_num_vectors) { 442 pp->num_vectors = MSI_DEF_NUM_VECTORS; 443 } else { 444 pp->ops->set_num_vectors(pp); 445 446 if (pp->num_vectors > MAX_MSI_IRQS || 447 pp->num_vectors == 0) { 448 dev_err(dev, 449 "Invalid number of vectors\n"); 450 goto error; 451 } 452 } 453 454 if (!pp->ops->msi_host_init) { 455 ret = dw_pcie_allocate_domains(pp); 456 if (ret) 457 goto error; 458 459 if (pp->msi_irq) 460 irq_set_chained_handler_and_data(pp->msi_irq, 461 dw_chained_msi_isr, 462 pp); 463 } else { 464 ret = pp->ops->msi_host_init(pp); 465 if (ret < 0) 466 goto error; 467 } 468 } 469 470 if (pp->ops->host_init) { 471 ret = pp->ops->host_init(pp); 472 if (ret) 473 goto error; 474 } 475 476 pp->root_bus_nr = pp->busn->start; 477 478 bridge->dev.parent = dev; 479 bridge->sysdata = pp; 480 bridge->busnr = pp->root_bus_nr; 481 bridge->ops = &dw_pcie_ops; 482 bridge->map_irq = of_irq_parse_and_map_pci; 483 bridge->swizzle_irq = pci_common_swizzle; 484 485 ret = pci_scan_root_bus_bridge(bridge); 486 if (ret) 487 goto error; 488 489 bus = bridge->bus; 490 491 if (pp->ops->scan_bus) 492 pp->ops->scan_bus(pp); 493 494 pci_bus_size_bridges(bus); 495 pci_bus_assign_resources(bus); 496 497 list_for_each_entry(child, &bus->children, node) 498 pcie_bus_configure_settings(child); 499 500 pci_bus_add_devices(bus); 501 return 0; 502 503 error: 504 pci_free_host_bridge(bridge); 505 return ret; 506 } 507 508 static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus, 509 u32 devfn, int where, int size, u32 *val) 510 { 511 int ret, type; 512 u32 busdev, cfg_size; 513 u64 cpu_addr; 514 void __iomem *va_cfg_base; 515 struct dw_pcie *pci = to_dw_pcie_from_pp(pp); 516 517 if (pp->ops->rd_other_conf) 518 return pp->ops->rd_other_conf(pp, bus, devfn, where, size, val); 519 520 busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) | 521 PCIE_ATU_FUNC(PCI_FUNC(devfn)); 522 523 if (bus->parent->number == pp->root_bus_nr) { 524 type = PCIE_ATU_TYPE_CFG0; 525 cpu_addr = pp->cfg0_base; 526 cfg_size = pp->cfg0_size; 527 va_cfg_base = pp->va_cfg0_base; 528 } else { 529 type = PCIE_ATU_TYPE_CFG1; 530 cpu_addr = pp->cfg1_base; 531 cfg_size = pp->cfg1_size; 532 va_cfg_base = pp->va_cfg1_base; 533 } 534 535 dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1, 536 type, cpu_addr, 537 busdev, cfg_size); 538 ret = dw_pcie_read(va_cfg_base + where, size, val); 539 if (pci->num_viewport <= 2) 540 dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1, 541 PCIE_ATU_TYPE_IO, pp->io_base, 542 pp->io_bus_addr, pp->io_size); 543 544 return ret; 545 } 546 547 static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus, 548 u32 devfn, int where, int size, u32 val) 549 { 550 int ret, type; 551 u32 busdev, cfg_size; 552 u64 cpu_addr; 553 void __iomem *va_cfg_base; 554 struct dw_pcie *pci = to_dw_pcie_from_pp(pp); 555 556 if (pp->ops->wr_other_conf) 557 return pp->ops->wr_other_conf(pp, bus, devfn, where, size, val); 558 559 busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) | 560 PCIE_ATU_FUNC(PCI_FUNC(devfn)); 561 562 if (bus->parent->number == pp->root_bus_nr) { 563 type = PCIE_ATU_TYPE_CFG0; 564 cpu_addr = pp->cfg0_base; 565 cfg_size = pp->cfg0_size; 566 va_cfg_base = pp->va_cfg0_base; 567 } else { 568 type = PCIE_ATU_TYPE_CFG1; 569 cpu_addr = pp->cfg1_base; 570 cfg_size = pp->cfg1_size; 571 va_cfg_base = pp->va_cfg1_base; 572 } 573 574 dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1, 575 type, cpu_addr, 576 busdev, cfg_size); 577 ret = dw_pcie_write(va_cfg_base + where, size, val); 578 if (pci->num_viewport <= 2) 579 dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1, 580 PCIE_ATU_TYPE_IO, pp->io_base, 581 pp->io_bus_addr, pp->io_size); 582 583 return ret; 584 } 585 586 static int dw_pcie_valid_device(struct pcie_port *pp, struct pci_bus *bus, 587 int dev) 588 { 589 struct dw_pcie *pci = to_dw_pcie_from_pp(pp); 590 591 /* If there is no link, then there is no device */ 592 if (bus->number != pp->root_bus_nr) { 593 if (!dw_pcie_link_up(pci)) 594 return 0; 595 } 596 597 /* Access only one slot on each root port */ 598 if (bus->number == pp->root_bus_nr && dev > 0) 599 return 0; 600 601 return 1; 602 } 603 604 static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where, 605 int size, u32 *val) 606 { 607 struct pcie_port *pp = bus->sysdata; 608 609 if (!dw_pcie_valid_device(pp, bus, PCI_SLOT(devfn))) { 610 *val = 0xffffffff; 611 return PCIBIOS_DEVICE_NOT_FOUND; 612 } 613 614 if (bus->number == pp->root_bus_nr) 615 return dw_pcie_rd_own_conf(pp, where, size, val); 616 617 return dw_pcie_rd_other_conf(pp, bus, devfn, where, size, val); 618 } 619 620 static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn, 621 int where, int size, u32 val) 622 { 623 struct pcie_port *pp = bus->sysdata; 624 625 if (!dw_pcie_valid_device(pp, bus, PCI_SLOT(devfn))) 626 return PCIBIOS_DEVICE_NOT_FOUND; 627 628 if (bus->number == pp->root_bus_nr) 629 return dw_pcie_wr_own_conf(pp, where, size, val); 630 631 return dw_pcie_wr_other_conf(pp, bus, devfn, where, size, val); 632 } 633 634 static struct pci_ops dw_pcie_ops = { 635 .read = dw_pcie_rd_conf, 636 .write = dw_pcie_wr_conf, 637 }; 638 639 static u8 dw_pcie_iatu_unroll_enabled(struct dw_pcie *pci) 640 { 641 u32 val; 642 643 val = dw_pcie_readl_dbi(pci, PCIE_ATU_VIEWPORT); 644 if (val == 0xffffffff) 645 return 1; 646 647 return 0; 648 } 649 650 void dw_pcie_setup_rc(struct pcie_port *pp) 651 { 652 u32 val, ctrl, num_ctrls; 653 struct dw_pcie *pci = to_dw_pcie_from_pp(pp); 654 655 dw_pcie_setup(pci); 656 657 num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL; 658 659 /* Initialize IRQ Status array */ 660 for (ctrl = 0; ctrl < num_ctrls; ctrl++) 661 dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE + 662 (ctrl * MSI_REG_CTRL_BLOCK_SIZE), 663 4, &pp->irq_status[ctrl]); 664 665 /* Setup RC BARs */ 666 dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 0x00000004); 667 dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_1, 0x00000000); 668 669 /* Setup interrupt pins */ 670 dw_pcie_dbi_ro_wr_en(pci); 671 val = dw_pcie_readl_dbi(pci, PCI_INTERRUPT_LINE); 672 val &= 0xffff00ff; 673 val |= 0x00000100; 674 dw_pcie_writel_dbi(pci, PCI_INTERRUPT_LINE, val); 675 dw_pcie_dbi_ro_wr_dis(pci); 676 677 /* Setup bus numbers */ 678 val = dw_pcie_readl_dbi(pci, PCI_PRIMARY_BUS); 679 val &= 0xff000000; 680 val |= 0x00ff0100; 681 dw_pcie_writel_dbi(pci, PCI_PRIMARY_BUS, val); 682 683 /* Setup command register */ 684 val = dw_pcie_readl_dbi(pci, PCI_COMMAND); 685 val &= 0xffff0000; 686 val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | 687 PCI_COMMAND_MASTER | PCI_COMMAND_SERR; 688 dw_pcie_writel_dbi(pci, PCI_COMMAND, val); 689 690 /* 691 * If the platform provides ->rd_other_conf, it means the platform 692 * uses its own address translation component rather than ATU, so 693 * we should not program the ATU here. 694 */ 695 if (!pp->ops->rd_other_conf) { 696 /* Get iATU unroll support */ 697 pci->iatu_unroll_enabled = dw_pcie_iatu_unroll_enabled(pci); 698 dev_dbg(pci->dev, "iATU unroll: %s\n", 699 pci->iatu_unroll_enabled ? "enabled" : "disabled"); 700 701 dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX0, 702 PCIE_ATU_TYPE_MEM, pp->mem_base, 703 pp->mem_bus_addr, pp->mem_size); 704 if (pci->num_viewport > 2) 705 dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX2, 706 PCIE_ATU_TYPE_IO, pp->io_base, 707 pp->io_bus_addr, pp->io_size); 708 } 709 710 dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0); 711 712 /* Enable write permission for the DBI read-only register */ 713 dw_pcie_dbi_ro_wr_en(pci); 714 /* Program correct class for RC */ 715 dw_pcie_wr_own_conf(pp, PCI_CLASS_DEVICE, 2, PCI_CLASS_BRIDGE_PCI); 716 /* Better disable write permission right after the update */ 717 dw_pcie_dbi_ro_wr_dis(pci); 718 719 dw_pcie_rd_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, &val); 720 val |= PORT_LOGIC_SPEED_CHANGE; 721 dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val); 722 } 723