17568cb4eSPaul Mackerras /* 27568cb4eSPaul Mackerras * Port for PPC64 David Engebretsen, IBM Corp. 37568cb4eSPaul Mackerras * Contains common pci routines for ppc64 platform, pSeries and iSeries brands. 47568cb4eSPaul Mackerras * 57568cb4eSPaul Mackerras * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM 67568cb4eSPaul Mackerras * Rework, based on alpha PCI code. 77568cb4eSPaul Mackerras * 87568cb4eSPaul Mackerras * This program is free software; you can redistribute it and/or 97568cb4eSPaul Mackerras * modify it under the terms of the GNU General Public License 107568cb4eSPaul Mackerras * as published by the Free Software Foundation; either version 117568cb4eSPaul Mackerras * 2 of the License, or (at your option) any later version. 127568cb4eSPaul Mackerras */ 137568cb4eSPaul Mackerras 147568cb4eSPaul Mackerras #undef DEBUG 157568cb4eSPaul Mackerras 167568cb4eSPaul Mackerras #include <linux/kernel.h> 177568cb4eSPaul Mackerras #include <linux/pci.h> 187568cb4eSPaul Mackerras #include <linux/string.h> 197568cb4eSPaul Mackerras #include <linux/init.h> 207568cb4eSPaul Mackerras #include <linux/bootmem.h> 217568cb4eSPaul Mackerras #include <linux/mm.h> 227568cb4eSPaul Mackerras #include <linux/list.h> 237568cb4eSPaul Mackerras #include <linux/syscalls.h> 246e99e458SBenjamin Herrenschmidt #include <linux/irq.h> 253d5134eeSBenjamin Herrenschmidt #include <linux/vmalloc.h> 267568cb4eSPaul Mackerras 277568cb4eSPaul Mackerras #include <asm/processor.h> 287568cb4eSPaul Mackerras #include <asm/io.h> 297568cb4eSPaul Mackerras #include <asm/prom.h> 307568cb4eSPaul Mackerras #include <asm/pci-bridge.h> 317568cb4eSPaul Mackerras #include <asm/byteorder.h> 327568cb4eSPaul Mackerras #include <asm/machdep.h> 337568cb4eSPaul Mackerras #include <asm/ppc-pci.h> 347568cb4eSPaul Mackerras 357568cb4eSPaul Mackerras unsigned long pci_probe_only = 1; 367568cb4eSPaul Mackerras 377568cb4eSPaul Mackerras /* pci_io_base -- the base address from which io bars are offsets. 387568cb4eSPaul Mackerras * This is the lowest I/O base address (so bar values are always positive), 397568cb4eSPaul Mackerras * and it *must* be the start of ISA space if an ISA bus exists because 403d5134eeSBenjamin Herrenschmidt * ISA drivers use hard coded offsets. If no ISA bus exists nothing 413d5134eeSBenjamin Herrenschmidt * is mapped on the first 64K of IO space 427568cb4eSPaul Mackerras */ 433d5134eeSBenjamin Herrenschmidt unsigned long pci_io_base = ISA_IO_BASE; 447568cb4eSPaul Mackerras EXPORT_SYMBOL(pci_io_base); 457568cb4eSPaul Mackerras 467568cb4eSPaul Mackerras static int __init pcibios_init(void) 477568cb4eSPaul Mackerras { 487568cb4eSPaul Mackerras struct pci_controller *hose, *tmp; 497568cb4eSPaul Mackerras 503fd94c6bSBenjamin Herrenschmidt printk(KERN_INFO "PCI: Probing PCI hardware\n"); 513fd94c6bSBenjamin Herrenschmidt 5253280323SBenjamin Herrenschmidt /* For now, override phys_mem_access_prot. If we need it,g 537568cb4eSPaul Mackerras * later, we may move that initialization to each ppc_md 547568cb4eSPaul Mackerras */ 557568cb4eSPaul Mackerras ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot; 567568cb4eSPaul Mackerras 573fd94c6bSBenjamin Herrenschmidt if (pci_probe_only) 583fd94c6bSBenjamin Herrenschmidt ppc_pci_flags |= PPC_PCI_PROBE_ONLY; 597568cb4eSPaul Mackerras 601fd0f525SBenjamin Herrenschmidt /* On ppc64, we always enable PCI domains and we keep domain 0 611fd0f525SBenjamin Herrenschmidt * backward compatible in /proc for video cards 621fd0f525SBenjamin Herrenschmidt */ 631fd0f525SBenjamin Herrenschmidt ppc_pci_flags |= PPC_PCI_ENABLE_PROC_DOMAINS | PPC_PCI_COMPAT_DOMAIN_0; 641fd0f525SBenjamin Herrenschmidt 657568cb4eSPaul Mackerras /* Scan all of the recorded PCI controllers. */ 6692eb4602SJohn Rose list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { 67*b5d937deSGrant Likely pcibios_scan_phb(hose); 6892eb4602SJohn Rose pci_bus_add_devices(hose->bus); 6992eb4602SJohn Rose } 707568cb4eSPaul Mackerras 713fd94c6bSBenjamin Herrenschmidt /* Call common code to handle resource allocation */ 723fd94c6bSBenjamin Herrenschmidt pcibios_resource_survey(); 737568cb4eSPaul Mackerras 74e884e9c5SOlof Johansson printk(KERN_DEBUG "PCI: Probing PCI hardware done\n"); 757568cb4eSPaul Mackerras 767568cb4eSPaul Mackerras return 0; 777568cb4eSPaul Mackerras } 787568cb4eSPaul Mackerras 797568cb4eSPaul Mackerras subsys_initcall(pcibios_init); 807568cb4eSPaul Mackerras 813d5134eeSBenjamin Herrenschmidt #ifdef CONFIG_HOTPLUG 823d5134eeSBenjamin Herrenschmidt 833d5134eeSBenjamin Herrenschmidt int pcibios_unmap_io_space(struct pci_bus *bus) 847568cb4eSPaul Mackerras { 853d5134eeSBenjamin Herrenschmidt struct pci_controller *hose; 867568cb4eSPaul Mackerras 873d5134eeSBenjamin Herrenschmidt WARN_ON(bus == NULL); 88de821204SBenjamin Herrenschmidt 893d5134eeSBenjamin Herrenschmidt /* If this is not a PHB, we only flush the hash table over 903d5134eeSBenjamin Herrenschmidt * the area mapped by this bridge. We don't play with the PTE 913d5134eeSBenjamin Herrenschmidt * mappings since we might have to deal with sub-page alignemnts 923d5134eeSBenjamin Herrenschmidt * so flushing the hash table is the only sane way to make sure 933d5134eeSBenjamin Herrenschmidt * that no hash entries are covering that removed bridge area 943d5134eeSBenjamin Herrenschmidt * while still allowing other busses overlapping those pages 9594491685SBenjamin Herrenschmidt * 9694491685SBenjamin Herrenschmidt * Note: If we ever support P2P hotplug on Book3E, we'll have 9794491685SBenjamin Herrenschmidt * to do an appropriate TLB flush here too 98de821204SBenjamin Herrenschmidt */ 993d5134eeSBenjamin Herrenschmidt if (bus->self) { 100ce7a35c7SKumar Gala #ifdef CONFIG_PPC_STD_MMU_64 1013d5134eeSBenjamin Herrenschmidt struct resource *res = bus->resource[0]; 102ce7a35c7SKumar Gala #endif 1033d5134eeSBenjamin Herrenschmidt 104b0494bc8SBenjamin Herrenschmidt pr_debug("IO unmapping for PCI-PCI bridge %s\n", 1053d5134eeSBenjamin Herrenschmidt pci_name(bus->self)); 1063d5134eeSBenjamin Herrenschmidt 10794491685SBenjamin Herrenschmidt #ifdef CONFIG_PPC_STD_MMU_64 1083d5134eeSBenjamin Herrenschmidt __flush_hash_table_range(&init_mm, res->start + _IO_BASE, 109b30115eaSBenjamin Herrenschmidt res->end + _IO_BASE + 1); 11094491685SBenjamin Herrenschmidt #endif 1113d5134eeSBenjamin Herrenschmidt return 0; 1127568cb4eSPaul Mackerras } 1137568cb4eSPaul Mackerras 1143d5134eeSBenjamin Herrenschmidt /* Get the host bridge */ 1153d5134eeSBenjamin Herrenschmidt hose = pci_bus_to_host(bus); 1163d5134eeSBenjamin Herrenschmidt 1173d5134eeSBenjamin Herrenschmidt /* Check if we have IOs allocated */ 1183d5134eeSBenjamin Herrenschmidt if (hose->io_base_alloc == 0) 1193d5134eeSBenjamin Herrenschmidt return 0; 1203d5134eeSBenjamin Herrenschmidt 121b0494bc8SBenjamin Herrenschmidt pr_debug("IO unmapping for PHB %s\n", hose->dn->full_name); 122b0494bc8SBenjamin Herrenschmidt pr_debug(" alloc=0x%p\n", hose->io_base_alloc); 1233d5134eeSBenjamin Herrenschmidt 1243d5134eeSBenjamin Herrenschmidt /* This is a PHB, we fully unmap the IO area */ 1253d5134eeSBenjamin Herrenschmidt vunmap(hose->io_base_alloc); 1263d5134eeSBenjamin Herrenschmidt 1273d5134eeSBenjamin Herrenschmidt return 0; 1283d5134eeSBenjamin Herrenschmidt } 1293d5134eeSBenjamin Herrenschmidt EXPORT_SYMBOL_GPL(pcibios_unmap_io_space); 1303d5134eeSBenjamin Herrenschmidt 1313d5134eeSBenjamin Herrenschmidt #endif /* CONFIG_HOTPLUG */ 1323d5134eeSBenjamin Herrenschmidt 1333d5134eeSBenjamin Herrenschmidt int __devinit pcibios_map_io_space(struct pci_bus *bus) 1347568cb4eSPaul Mackerras { 1353d5134eeSBenjamin Herrenschmidt struct vm_struct *area; 1363d5134eeSBenjamin Herrenschmidt unsigned long phys_page; 1373d5134eeSBenjamin Herrenschmidt unsigned long size_page; 1387568cb4eSPaul Mackerras unsigned long io_virt_offset; 1393d5134eeSBenjamin Herrenschmidt struct pci_controller *hose; 1407568cb4eSPaul Mackerras 1413d5134eeSBenjamin Herrenschmidt WARN_ON(bus == NULL); 142de821204SBenjamin Herrenschmidt 1433d5134eeSBenjamin Herrenschmidt /* If this not a PHB, nothing to do, page tables still exist and 1443d5134eeSBenjamin Herrenschmidt * thus HPTEs will be faulted in when needed 1453d5134eeSBenjamin Herrenschmidt */ 1463d5134eeSBenjamin Herrenschmidt if (bus->self) { 147b0494bc8SBenjamin Herrenschmidt pr_debug("IO mapping for PCI-PCI bridge %s\n", 1483d5134eeSBenjamin Herrenschmidt pci_name(bus->self)); 1499477e455SStephen Rothwell pr_debug(" virt=0x%016llx...0x%016llx\n", 1503d5134eeSBenjamin Herrenschmidt bus->resource[0]->start + _IO_BASE, 1513d5134eeSBenjamin Herrenschmidt bus->resource[0]->end + _IO_BASE); 1527568cb4eSPaul Mackerras return 0; 1537568cb4eSPaul Mackerras } 1547568cb4eSPaul Mackerras 1553d5134eeSBenjamin Herrenschmidt /* Get the host bridge */ 1563d5134eeSBenjamin Herrenschmidt hose = pci_bus_to_host(bus); 1573d5134eeSBenjamin Herrenschmidt phys_page = _ALIGN_DOWN(hose->io_base_phys, PAGE_SIZE); 1583d5134eeSBenjamin Herrenschmidt size_page = _ALIGN_UP(hose->pci_io_size, PAGE_SIZE); 1597568cb4eSPaul Mackerras 1603d5134eeSBenjamin Herrenschmidt /* Make sure IO area address is clear */ 1613d5134eeSBenjamin Herrenschmidt hose->io_base_alloc = NULL; 1627568cb4eSPaul Mackerras 1633d5134eeSBenjamin Herrenschmidt /* If there's no IO to map on that bus, get away too */ 1643d5134eeSBenjamin Herrenschmidt if (hose->pci_io_size == 0 || hose->io_base_phys == 0) 1653d5134eeSBenjamin Herrenschmidt return 0; 1663d5134eeSBenjamin Herrenschmidt 1673d5134eeSBenjamin Herrenschmidt /* Let's allocate some IO space for that guy. We don't pass 1683d5134eeSBenjamin Herrenschmidt * VM_IOREMAP because we don't care about alignment tricks that 1693d5134eeSBenjamin Herrenschmidt * the core does in that case. Maybe we should due to stupid card 1703d5134eeSBenjamin Herrenschmidt * with incomplete address decoding but I'd rather not deal with 1713d5134eeSBenjamin Herrenschmidt * those outside of the reserved 64K legacy region. 1723d5134eeSBenjamin Herrenschmidt */ 1733d5134eeSBenjamin Herrenschmidt area = __get_vm_area(size_page, 0, PHB_IO_BASE, PHB_IO_END); 1743d5134eeSBenjamin Herrenschmidt if (area == NULL) 1753d5134eeSBenjamin Herrenschmidt return -ENOMEM; 1763d5134eeSBenjamin Herrenschmidt hose->io_base_alloc = area->addr; 1773d5134eeSBenjamin Herrenschmidt hose->io_base_virt = (void __iomem *)(area->addr + 1783d5134eeSBenjamin Herrenschmidt hose->io_base_phys - phys_page); 1793d5134eeSBenjamin Herrenschmidt 180b0494bc8SBenjamin Herrenschmidt pr_debug("IO mapping for PHB %s\n", hose->dn->full_name); 1819477e455SStephen Rothwell pr_debug(" phys=0x%016llx, virt=0x%p (alloc=0x%p)\n", 1823d5134eeSBenjamin Herrenschmidt hose->io_base_phys, hose->io_base_virt, hose->io_base_alloc); 183bcba0778SStephen Rothwell pr_debug(" size=0x%016llx (alloc=0x%016lx)\n", 1843d5134eeSBenjamin Herrenschmidt hose->pci_io_size, size_page); 1853d5134eeSBenjamin Herrenschmidt 1863d5134eeSBenjamin Herrenschmidt /* Establish the mapping */ 1873d5134eeSBenjamin Herrenschmidt if (__ioremap_at(phys_page, area->addr, size_page, 1883d5134eeSBenjamin Herrenschmidt _PAGE_NO_CACHE | _PAGE_GUARDED) == NULL) 1893d5134eeSBenjamin Herrenschmidt return -ENOMEM; 1903d5134eeSBenjamin Herrenschmidt 1913d5134eeSBenjamin Herrenschmidt /* Fixup hose IO resource */ 1923d5134eeSBenjamin Herrenschmidt io_virt_offset = (unsigned long)hose->io_base_virt - _IO_BASE; 1933d5134eeSBenjamin Herrenschmidt hose->io_resource.start += io_virt_offset; 1943d5134eeSBenjamin Herrenschmidt hose->io_resource.end += io_virt_offset; 1953d5134eeSBenjamin Herrenschmidt 196518fdae2SJoe Perches pr_debug(" hose->io_resource=%pR\n", &hose->io_resource); 1977568cb4eSPaul Mackerras 1987568cb4eSPaul Mackerras return 0; 1997568cb4eSPaul Mackerras } 2003d5134eeSBenjamin Herrenschmidt EXPORT_SYMBOL_GPL(pcibios_map_io_space); 2017568cb4eSPaul Mackerras 2020ed2c722SGrant Likely void __devinit pcibios_setup_phb_io_space(struct pci_controller *hose) 2030ed2c722SGrant Likely { 2040ed2c722SGrant Likely pcibios_map_io_space(hose->bus); 2050ed2c722SGrant Likely } 2060ed2c722SGrant Likely 2077568cb4eSPaul Mackerras #define IOBASE_BRIDGE_NUMBER 0 2087568cb4eSPaul Mackerras #define IOBASE_MEMORY 1 2097568cb4eSPaul Mackerras #define IOBASE_IO 2 2107568cb4eSPaul Mackerras #define IOBASE_ISA_IO 3 2117568cb4eSPaul Mackerras #define IOBASE_ISA_MEM 4 2127568cb4eSPaul Mackerras 2137568cb4eSPaul Mackerras long sys_pciconfig_iobase(long which, unsigned long in_bus, 2147568cb4eSPaul Mackerras unsigned long in_devfn) 2157568cb4eSPaul Mackerras { 2167568cb4eSPaul Mackerras struct pci_controller* hose; 2177568cb4eSPaul Mackerras struct list_head *ln; 2187568cb4eSPaul Mackerras struct pci_bus *bus = NULL; 2197568cb4eSPaul Mackerras struct device_node *hose_node; 2207568cb4eSPaul Mackerras 2217568cb4eSPaul Mackerras /* Argh ! Please forgive me for that hack, but that's the 2227568cb4eSPaul Mackerras * simplest way to get existing XFree to not lockup on some 2237568cb4eSPaul Mackerras * G5 machines... So when something asks for bus 0 io base 2247568cb4eSPaul Mackerras * (bus 0 is HT root), we return the AGP one instead. 2257568cb4eSPaul Mackerras */ 22671a157e8SGrant Likely if (in_bus == 0 && of_machine_is_compatible("MacRISC4")) { 22716124f10SPaul Mackerras struct device_node *agp; 22816124f10SPaul Mackerras 22916124f10SPaul Mackerras agp = of_find_compatible_node(NULL, NULL, "u3-agp"); 23016124f10SPaul Mackerras if (agp) 2317568cb4eSPaul Mackerras in_bus = 0xf0; 23216124f10SPaul Mackerras of_node_put(agp); 23316124f10SPaul Mackerras } 2347568cb4eSPaul Mackerras 2357568cb4eSPaul Mackerras /* That syscall isn't quite compatible with PCI domains, but it's 2367568cb4eSPaul Mackerras * used on pre-domains setup. We return the first match 2377568cb4eSPaul Mackerras */ 2387568cb4eSPaul Mackerras 2397568cb4eSPaul Mackerras for (ln = pci_root_buses.next; ln != &pci_root_buses; ln = ln->next) { 2407568cb4eSPaul Mackerras bus = pci_bus_b(ln); 241545da94fSBenjamin Herrenschmidt if (in_bus >= bus->number && in_bus <= bus->subordinate) 2427568cb4eSPaul Mackerras break; 2437568cb4eSPaul Mackerras bus = NULL; 2447568cb4eSPaul Mackerras } 245*b5d937deSGrant Likely if (bus == NULL || bus->dev.of_node == NULL) 2467568cb4eSPaul Mackerras return -ENODEV; 2477568cb4eSPaul Mackerras 248*b5d937deSGrant Likely hose_node = bus->dev.of_node; 2497568cb4eSPaul Mackerras hose = PCI_DN(hose_node)->phb; 2507568cb4eSPaul Mackerras 2517568cb4eSPaul Mackerras switch (which) { 2527568cb4eSPaul Mackerras case IOBASE_BRIDGE_NUMBER: 2537568cb4eSPaul Mackerras return (long)hose->first_busno; 2547568cb4eSPaul Mackerras case IOBASE_MEMORY: 2557568cb4eSPaul Mackerras return (long)hose->pci_mem_offset; 2567568cb4eSPaul Mackerras case IOBASE_IO: 2577568cb4eSPaul Mackerras return (long)hose->io_base_phys; 2587568cb4eSPaul Mackerras case IOBASE_ISA_IO: 2597568cb4eSPaul Mackerras return (long)isa_io_base; 2607568cb4eSPaul Mackerras case IOBASE_ISA_MEM: 2617568cb4eSPaul Mackerras return -EINVAL; 2627568cb4eSPaul Mackerras } 2637568cb4eSPaul Mackerras 2647568cb4eSPaul Mackerras return -EOPNOTSUPP; 2657568cb4eSPaul Mackerras } 266357518faSAnton Blanchard 267357518faSAnton Blanchard #ifdef CONFIG_NUMA 268357518faSAnton Blanchard int pcibus_to_node(struct pci_bus *bus) 269357518faSAnton Blanchard { 270357518faSAnton Blanchard struct pci_controller *phb = pci_bus_to_host(bus); 271357518faSAnton Blanchard return phb->node; 272357518faSAnton Blanchard } 273357518faSAnton Blanchard EXPORT_SYMBOL(pcibus_to_node); 274357518faSAnton Blanchard #endif 275