1fb9aa6f1SThomas Gleixner /* 2fb9aa6f1SThomas Gleixner * Low-Level PCI Support for PC 3fb9aa6f1SThomas Gleixner * 4fb9aa6f1SThomas Gleixner * (c) 1999--2000 Martin Mares <mj@ucw.cz> 5fb9aa6f1SThomas Gleixner */ 6fb9aa6f1SThomas Gleixner 7fb9aa6f1SThomas Gleixner #include <linux/sched.h> 8fb9aa6f1SThomas Gleixner #include <linux/pci.h> 9fb9aa6f1SThomas Gleixner #include <linux/ioport.h> 10fb9aa6f1SThomas Gleixner #include <linux/init.h> 11fb9aa6f1SThomas Gleixner #include <linux/dmi.h> 12fb9aa6f1SThomas Gleixner 13fb9aa6f1SThomas Gleixner #include <asm/acpi.h> 14fb9aa6f1SThomas Gleixner #include <asm/segment.h> 15fb9aa6f1SThomas Gleixner #include <asm/io.h> 16fb9aa6f1SThomas Gleixner #include <asm/smp.h> 17fb9aa6f1SThomas Gleixner 18fb9aa6f1SThomas Gleixner #include "pci.h" 19fb9aa6f1SThomas Gleixner 20fb9aa6f1SThomas Gleixner unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 | 21fb9aa6f1SThomas Gleixner PCI_PROBE_MMCONF; 22fb9aa6f1SThomas Gleixner 23fb9aa6f1SThomas Gleixner static int pci_bf_sort; 24fb9aa6f1SThomas Gleixner int pci_routeirq; 25fb9aa6f1SThomas Gleixner int pcibios_last_bus = -1; 26fb9aa6f1SThomas Gleixner unsigned long pirq_table_addr; 27fb9aa6f1SThomas Gleixner struct pci_bus *pci_root_bus; 28fb9aa6f1SThomas Gleixner struct pci_raw_ops *raw_pci_ops; 29fb9aa6f1SThomas Gleixner 30fb9aa6f1SThomas Gleixner static int pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value) 31fb9aa6f1SThomas Gleixner { 32fb9aa6f1SThomas Gleixner return raw_pci_ops->read(0, bus->number, devfn, where, size, value); 33fb9aa6f1SThomas Gleixner } 34fb9aa6f1SThomas Gleixner 35fb9aa6f1SThomas Gleixner static int pci_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value) 36fb9aa6f1SThomas Gleixner { 37fb9aa6f1SThomas Gleixner return raw_pci_ops->write(0, bus->number, devfn, where, size, value); 38fb9aa6f1SThomas Gleixner } 39fb9aa6f1SThomas Gleixner 40fb9aa6f1SThomas Gleixner struct pci_ops pci_root_ops = { 41fb9aa6f1SThomas Gleixner .read = pci_read, 42fb9aa6f1SThomas Gleixner .write = pci_write, 43fb9aa6f1SThomas Gleixner }; 44fb9aa6f1SThomas Gleixner 45fb9aa6f1SThomas Gleixner /* 46fb9aa6f1SThomas Gleixner * legacy, numa, and acpi all want to call pcibios_scan_root 47fb9aa6f1SThomas Gleixner * from their initcalls. This flag prevents that. 48fb9aa6f1SThomas Gleixner */ 49fb9aa6f1SThomas Gleixner int pcibios_scanned; 50fb9aa6f1SThomas Gleixner 51fb9aa6f1SThomas Gleixner /* 52fb9aa6f1SThomas Gleixner * This interrupt-safe spinlock protects all accesses to PCI 53fb9aa6f1SThomas Gleixner * configuration space. 54fb9aa6f1SThomas Gleixner */ 55fb9aa6f1SThomas Gleixner DEFINE_SPINLOCK(pci_config_lock); 56fb9aa6f1SThomas Gleixner 57fb9aa6f1SThomas Gleixner /* 58fb9aa6f1SThomas Gleixner * Several buggy motherboards address only 16 devices and mirror 59fb9aa6f1SThomas Gleixner * them to next 16 IDs. We try to detect this `feature' on all 60fb9aa6f1SThomas Gleixner * primary buses (those containing host bridges as they are 61fb9aa6f1SThomas Gleixner * expected to be unique) and remove the ghost devices. 62fb9aa6f1SThomas Gleixner */ 63fb9aa6f1SThomas Gleixner 64fb9aa6f1SThomas Gleixner static void __devinit pcibios_fixup_ghosts(struct pci_bus *b) 65fb9aa6f1SThomas Gleixner { 66fb9aa6f1SThomas Gleixner struct list_head *ln, *mn; 67fb9aa6f1SThomas Gleixner struct pci_dev *d, *e; 68fb9aa6f1SThomas Gleixner int mirror = PCI_DEVFN(16,0); 69fb9aa6f1SThomas Gleixner int seen_host_bridge = 0; 70fb9aa6f1SThomas Gleixner int i; 71fb9aa6f1SThomas Gleixner 72fb9aa6f1SThomas Gleixner DBG("PCI: Scanning for ghost devices on bus %d\n", b->number); 73fb9aa6f1SThomas Gleixner list_for_each(ln, &b->devices) { 74fb9aa6f1SThomas Gleixner d = pci_dev_b(ln); 75fb9aa6f1SThomas Gleixner if ((d->class >> 8) == PCI_CLASS_BRIDGE_HOST) 76fb9aa6f1SThomas Gleixner seen_host_bridge++; 77fb9aa6f1SThomas Gleixner for (mn=ln->next; mn != &b->devices; mn=mn->next) { 78fb9aa6f1SThomas Gleixner e = pci_dev_b(mn); 79fb9aa6f1SThomas Gleixner if (e->devfn != d->devfn + mirror || 80fb9aa6f1SThomas Gleixner e->vendor != d->vendor || 81fb9aa6f1SThomas Gleixner e->device != d->device || 82fb9aa6f1SThomas Gleixner e->class != d->class) 83fb9aa6f1SThomas Gleixner continue; 84fb9aa6f1SThomas Gleixner for(i=0; i<PCI_NUM_RESOURCES; i++) 85fb9aa6f1SThomas Gleixner if (e->resource[i].start != d->resource[i].start || 86fb9aa6f1SThomas Gleixner e->resource[i].end != d->resource[i].end || 87fb9aa6f1SThomas Gleixner e->resource[i].flags != d->resource[i].flags) 88fb9aa6f1SThomas Gleixner continue; 89fb9aa6f1SThomas Gleixner break; 90fb9aa6f1SThomas Gleixner } 91fb9aa6f1SThomas Gleixner if (mn == &b->devices) 92fb9aa6f1SThomas Gleixner return; 93fb9aa6f1SThomas Gleixner } 94fb9aa6f1SThomas Gleixner if (!seen_host_bridge) 95fb9aa6f1SThomas Gleixner return; 96fb9aa6f1SThomas Gleixner printk(KERN_WARNING "PCI: Ignoring ghost devices on bus %02x\n", b->number); 97fb9aa6f1SThomas Gleixner 98fb9aa6f1SThomas Gleixner ln = &b->devices; 99fb9aa6f1SThomas Gleixner while (ln->next != &b->devices) { 100fb9aa6f1SThomas Gleixner d = pci_dev_b(ln->next); 101fb9aa6f1SThomas Gleixner if (d->devfn >= mirror) { 102fb9aa6f1SThomas Gleixner list_del(&d->global_list); 103fb9aa6f1SThomas Gleixner list_del(&d->bus_list); 104fb9aa6f1SThomas Gleixner kfree(d); 105fb9aa6f1SThomas Gleixner } else 106fb9aa6f1SThomas Gleixner ln = ln->next; 107fb9aa6f1SThomas Gleixner } 108fb9aa6f1SThomas Gleixner } 109fb9aa6f1SThomas Gleixner 110fb9aa6f1SThomas Gleixner /* 111fb9aa6f1SThomas Gleixner * Called after each bus is probed, but before its children 112fb9aa6f1SThomas Gleixner * are examined. 113fb9aa6f1SThomas Gleixner */ 114fb9aa6f1SThomas Gleixner 115fb9aa6f1SThomas Gleixner void __devinit pcibios_fixup_bus(struct pci_bus *b) 116fb9aa6f1SThomas Gleixner { 117fb9aa6f1SThomas Gleixner pcibios_fixup_ghosts(b); 118fb9aa6f1SThomas Gleixner pci_read_bridge_bases(b); 119fb9aa6f1SThomas Gleixner } 120fb9aa6f1SThomas Gleixner 121fb9aa6f1SThomas Gleixner /* 122fb9aa6f1SThomas Gleixner * Only use DMI information to set this if nothing was passed 123fb9aa6f1SThomas Gleixner * on the kernel command line (which was parsed earlier). 124fb9aa6f1SThomas Gleixner */ 125fb9aa6f1SThomas Gleixner 12619ad7ae4SLinus Torvalds static int __devinit set_bf_sort(const struct dmi_system_id *d) 127fb9aa6f1SThomas Gleixner { 128fb9aa6f1SThomas Gleixner if (pci_bf_sort == pci_bf_sort_default) { 129fb9aa6f1SThomas Gleixner pci_bf_sort = pci_dmi_bf; 130fb9aa6f1SThomas Gleixner printk(KERN_INFO "PCI: %s detected, enabling pci=bfsort.\n", d->ident); 131fb9aa6f1SThomas Gleixner } 132fb9aa6f1SThomas Gleixner return 0; 133fb9aa6f1SThomas Gleixner } 134fb9aa6f1SThomas Gleixner 135fb9aa6f1SThomas Gleixner /* 136fb9aa6f1SThomas Gleixner * Enable renumbering of PCI bus# ranges to reach all PCI busses (Cardbus) 137fb9aa6f1SThomas Gleixner */ 138fb9aa6f1SThomas Gleixner #ifdef __i386__ 13919ad7ae4SLinus Torvalds static int __devinit assign_all_busses(const struct dmi_system_id *d) 140fb9aa6f1SThomas Gleixner { 141fb9aa6f1SThomas Gleixner pci_probe |= PCI_ASSIGN_ALL_BUSSES; 142fb9aa6f1SThomas Gleixner printk(KERN_INFO "%s detected: enabling PCI bus# renumbering" 143fb9aa6f1SThomas Gleixner " (pci=assign-busses)\n", d->ident); 144fb9aa6f1SThomas Gleixner return 0; 145fb9aa6f1SThomas Gleixner } 146fb9aa6f1SThomas Gleixner #endif 147fb9aa6f1SThomas Gleixner 148fb9aa6f1SThomas Gleixner static struct dmi_system_id __devinitdata pciprobe_dmi_table[] = { 149fb9aa6f1SThomas Gleixner #ifdef __i386__ 150fb9aa6f1SThomas Gleixner /* 151fb9aa6f1SThomas Gleixner * Laptops which need pci=assign-busses to see Cardbus cards 152fb9aa6f1SThomas Gleixner */ 153fb9aa6f1SThomas Gleixner { 154fb9aa6f1SThomas Gleixner .callback = assign_all_busses, 155fb9aa6f1SThomas Gleixner .ident = "Samsung X20 Laptop", 156fb9aa6f1SThomas Gleixner .matches = { 157fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_SYS_VENDOR, "Samsung Electronics"), 158fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_PRODUCT_NAME, "SX20S"), 159fb9aa6f1SThomas Gleixner }, 160fb9aa6f1SThomas Gleixner }, 161fb9aa6f1SThomas Gleixner #endif /* __i386__ */ 162fb9aa6f1SThomas Gleixner { 163fb9aa6f1SThomas Gleixner .callback = set_bf_sort, 164fb9aa6f1SThomas Gleixner .ident = "Dell PowerEdge 1950", 165fb9aa6f1SThomas Gleixner .matches = { 166fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_SYS_VENDOR, "Dell"), 167fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1950"), 168fb9aa6f1SThomas Gleixner }, 169fb9aa6f1SThomas Gleixner }, 170fb9aa6f1SThomas Gleixner { 171fb9aa6f1SThomas Gleixner .callback = set_bf_sort, 172fb9aa6f1SThomas Gleixner .ident = "Dell PowerEdge 1955", 173fb9aa6f1SThomas Gleixner .matches = { 174fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_SYS_VENDOR, "Dell"), 175fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1955"), 176fb9aa6f1SThomas Gleixner }, 177fb9aa6f1SThomas Gleixner }, 178fb9aa6f1SThomas Gleixner { 179fb9aa6f1SThomas Gleixner .callback = set_bf_sort, 180fb9aa6f1SThomas Gleixner .ident = "Dell PowerEdge 2900", 181fb9aa6f1SThomas Gleixner .matches = { 182fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_SYS_VENDOR, "Dell"), 183fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2900"), 184fb9aa6f1SThomas Gleixner }, 185fb9aa6f1SThomas Gleixner }, 186fb9aa6f1SThomas Gleixner { 187fb9aa6f1SThomas Gleixner .callback = set_bf_sort, 188fb9aa6f1SThomas Gleixner .ident = "Dell PowerEdge 2950", 189fb9aa6f1SThomas Gleixner .matches = { 190fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_SYS_VENDOR, "Dell"), 191fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2950"), 192fb9aa6f1SThomas Gleixner }, 193fb9aa6f1SThomas Gleixner }, 194fb9aa6f1SThomas Gleixner { 195fb9aa6f1SThomas Gleixner .callback = set_bf_sort, 196fb9aa6f1SThomas Gleixner .ident = "Dell PowerEdge R900", 197fb9aa6f1SThomas Gleixner .matches = { 198fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_SYS_VENDOR, "Dell"), 199fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge R900"), 200fb9aa6f1SThomas Gleixner }, 201fb9aa6f1SThomas Gleixner }, 202fb9aa6f1SThomas Gleixner { 203fb9aa6f1SThomas Gleixner .callback = set_bf_sort, 204fb9aa6f1SThomas Gleixner .ident = "HP ProLiant BL20p G3", 205fb9aa6f1SThomas Gleixner .matches = { 206fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_SYS_VENDOR, "HP"), 207fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G3"), 208fb9aa6f1SThomas Gleixner }, 209fb9aa6f1SThomas Gleixner }, 210fb9aa6f1SThomas Gleixner { 211fb9aa6f1SThomas Gleixner .callback = set_bf_sort, 212fb9aa6f1SThomas Gleixner .ident = "HP ProLiant BL20p G4", 213fb9aa6f1SThomas Gleixner .matches = { 214fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_SYS_VENDOR, "HP"), 215fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G4"), 216fb9aa6f1SThomas Gleixner }, 217fb9aa6f1SThomas Gleixner }, 218fb9aa6f1SThomas Gleixner { 219fb9aa6f1SThomas Gleixner .callback = set_bf_sort, 220fb9aa6f1SThomas Gleixner .ident = "HP ProLiant BL30p G1", 221fb9aa6f1SThomas Gleixner .matches = { 222fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_SYS_VENDOR, "HP"), 223fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL30p G1"), 224fb9aa6f1SThomas Gleixner }, 225fb9aa6f1SThomas Gleixner }, 226fb9aa6f1SThomas Gleixner { 227fb9aa6f1SThomas Gleixner .callback = set_bf_sort, 228fb9aa6f1SThomas Gleixner .ident = "HP ProLiant BL25p G1", 229fb9aa6f1SThomas Gleixner .matches = { 230fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_SYS_VENDOR, "HP"), 231fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL25p G1"), 232fb9aa6f1SThomas Gleixner }, 233fb9aa6f1SThomas Gleixner }, 234fb9aa6f1SThomas Gleixner { 235fb9aa6f1SThomas Gleixner .callback = set_bf_sort, 236fb9aa6f1SThomas Gleixner .ident = "HP ProLiant BL35p G1", 237fb9aa6f1SThomas Gleixner .matches = { 238fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_SYS_VENDOR, "HP"), 239fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL35p G1"), 240fb9aa6f1SThomas Gleixner }, 241fb9aa6f1SThomas Gleixner }, 242fb9aa6f1SThomas Gleixner { 243fb9aa6f1SThomas Gleixner .callback = set_bf_sort, 244fb9aa6f1SThomas Gleixner .ident = "HP ProLiant BL45p G1", 245fb9aa6f1SThomas Gleixner .matches = { 246fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_SYS_VENDOR, "HP"), 247fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G1"), 248fb9aa6f1SThomas Gleixner }, 249fb9aa6f1SThomas Gleixner }, 250fb9aa6f1SThomas Gleixner { 251fb9aa6f1SThomas Gleixner .callback = set_bf_sort, 252fb9aa6f1SThomas Gleixner .ident = "HP ProLiant BL45p G2", 253fb9aa6f1SThomas Gleixner .matches = { 254fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_SYS_VENDOR, "HP"), 255fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G2"), 256fb9aa6f1SThomas Gleixner }, 257fb9aa6f1SThomas Gleixner }, 258fb9aa6f1SThomas Gleixner { 259fb9aa6f1SThomas Gleixner .callback = set_bf_sort, 260fb9aa6f1SThomas Gleixner .ident = "HP ProLiant BL460c G1", 261fb9aa6f1SThomas Gleixner .matches = { 262fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_SYS_VENDOR, "HP"), 263fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL460c G1"), 264fb9aa6f1SThomas Gleixner }, 265fb9aa6f1SThomas Gleixner }, 266fb9aa6f1SThomas Gleixner { 267fb9aa6f1SThomas Gleixner .callback = set_bf_sort, 268fb9aa6f1SThomas Gleixner .ident = "HP ProLiant BL465c G1", 269fb9aa6f1SThomas Gleixner .matches = { 270fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_SYS_VENDOR, "HP"), 271fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL465c G1"), 272fb9aa6f1SThomas Gleixner }, 273fb9aa6f1SThomas Gleixner }, 274fb9aa6f1SThomas Gleixner { 275fb9aa6f1SThomas Gleixner .callback = set_bf_sort, 276fb9aa6f1SThomas Gleixner .ident = "HP ProLiant BL480c G1", 277fb9aa6f1SThomas Gleixner .matches = { 278fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_SYS_VENDOR, "HP"), 279fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL480c G1"), 280fb9aa6f1SThomas Gleixner }, 281fb9aa6f1SThomas Gleixner }, 282fb9aa6f1SThomas Gleixner { 283fb9aa6f1SThomas Gleixner .callback = set_bf_sort, 284fb9aa6f1SThomas Gleixner .ident = "HP ProLiant BL685c G1", 285fb9aa6f1SThomas Gleixner .matches = { 286fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_SYS_VENDOR, "HP"), 287fb9aa6f1SThomas Gleixner DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL685c G1"), 288fb9aa6f1SThomas Gleixner }, 289fb9aa6f1SThomas Gleixner }, 2905b1ea82fSJuha Laiho #ifdef __i386__ 2915b1ea82fSJuha Laiho { 2925b1ea82fSJuha Laiho .callback = assign_all_busses, 2935b1ea82fSJuha Laiho .ident = "Compaq EVO N800c", 2945b1ea82fSJuha Laiho .matches = { 2955b1ea82fSJuha Laiho DMI_MATCH(DMI_SYS_VENDOR, "Compaq"), 2965b1ea82fSJuha Laiho DMI_MATCH(DMI_PRODUCT_NAME, "EVO N800c"), 2975b1ea82fSJuha Laiho }, 2985b1ea82fSJuha Laiho }, 2995b1ea82fSJuha Laiho #endif 300fb9aa6f1SThomas Gleixner {} 301fb9aa6f1SThomas Gleixner }; 302fb9aa6f1SThomas Gleixner 303fb9aa6f1SThomas Gleixner struct pci_bus * __devinit pcibios_scan_root(int busnum) 304fb9aa6f1SThomas Gleixner { 305fb9aa6f1SThomas Gleixner struct pci_bus *bus = NULL; 306fb9aa6f1SThomas Gleixner struct pci_sysdata *sd; 307fb9aa6f1SThomas Gleixner 308fb9aa6f1SThomas Gleixner dmi_check_system(pciprobe_dmi_table); 309fb9aa6f1SThomas Gleixner 310fb9aa6f1SThomas Gleixner while ((bus = pci_find_next_bus(bus)) != NULL) { 311fb9aa6f1SThomas Gleixner if (bus->number == busnum) { 312fb9aa6f1SThomas Gleixner /* Already scanned */ 313fb9aa6f1SThomas Gleixner return bus; 314fb9aa6f1SThomas Gleixner } 315fb9aa6f1SThomas Gleixner } 316fb9aa6f1SThomas Gleixner 317fb9aa6f1SThomas Gleixner /* Allocate per-root-bus (not per bus) arch-specific data. 318fb9aa6f1SThomas Gleixner * TODO: leak; this memory is never freed. 319fb9aa6f1SThomas Gleixner * It's arguable whether it's worth the trouble to care. 320fb9aa6f1SThomas Gleixner */ 321fb9aa6f1SThomas Gleixner sd = kzalloc(sizeof(*sd), GFP_KERNEL); 322fb9aa6f1SThomas Gleixner if (!sd) { 323fb9aa6f1SThomas Gleixner printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum); 324fb9aa6f1SThomas Gleixner return NULL; 325fb9aa6f1SThomas Gleixner } 326fb9aa6f1SThomas Gleixner 327fb9aa6f1SThomas Gleixner printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busnum); 328fb9aa6f1SThomas Gleixner 329fb9aa6f1SThomas Gleixner return pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd); 330fb9aa6f1SThomas Gleixner } 331fb9aa6f1SThomas Gleixner 332fb9aa6f1SThomas Gleixner extern u8 pci_cache_line_size; 333fb9aa6f1SThomas Gleixner 334fb9aa6f1SThomas Gleixner static int __init pcibios_init(void) 335fb9aa6f1SThomas Gleixner { 336fb9aa6f1SThomas Gleixner struct cpuinfo_x86 *c = &boot_cpu_data; 337fb9aa6f1SThomas Gleixner 338fb9aa6f1SThomas Gleixner if (!raw_pci_ops) { 339fb9aa6f1SThomas Gleixner printk(KERN_WARNING "PCI: System does not support PCI\n"); 340fb9aa6f1SThomas Gleixner return 0; 341fb9aa6f1SThomas Gleixner } 342fb9aa6f1SThomas Gleixner 343fb9aa6f1SThomas Gleixner /* 344fb9aa6f1SThomas Gleixner * Assume PCI cacheline size of 32 bytes for all x86s except K7/K8 345fb9aa6f1SThomas Gleixner * and P4. It's also good for 386/486s (which actually have 16) 346fb9aa6f1SThomas Gleixner * as quite a few PCI devices do not support smaller values. 347fb9aa6f1SThomas Gleixner */ 348fb9aa6f1SThomas Gleixner pci_cache_line_size = 32 >> 2; 349fb9aa6f1SThomas Gleixner if (c->x86 >= 6 && c->x86_vendor == X86_VENDOR_AMD) 350fb9aa6f1SThomas Gleixner pci_cache_line_size = 64 >> 2; /* K7 & K8 */ 351fb9aa6f1SThomas Gleixner else if (c->x86 > 6 && c->x86_vendor == X86_VENDOR_INTEL) 352fb9aa6f1SThomas Gleixner pci_cache_line_size = 128 >> 2; /* P4 */ 353fb9aa6f1SThomas Gleixner 354fb9aa6f1SThomas Gleixner pcibios_resource_survey(); 355fb9aa6f1SThomas Gleixner 356fb9aa6f1SThomas Gleixner if (pci_bf_sort >= pci_force_bf) 357fb9aa6f1SThomas Gleixner pci_sort_breadthfirst(); 358fb9aa6f1SThomas Gleixner #ifdef CONFIG_PCI_BIOS 359fb9aa6f1SThomas Gleixner if ((pci_probe & PCI_BIOS_SORT) && !(pci_probe & PCI_NO_SORT)) 360fb9aa6f1SThomas Gleixner pcibios_sort(); 361fb9aa6f1SThomas Gleixner #endif 362fb9aa6f1SThomas Gleixner return 0; 363fb9aa6f1SThomas Gleixner } 364fb9aa6f1SThomas Gleixner 365fb9aa6f1SThomas Gleixner subsys_initcall(pcibios_init); 366fb9aa6f1SThomas Gleixner 367fb9aa6f1SThomas Gleixner char * __devinit pcibios_setup(char *str) 368fb9aa6f1SThomas Gleixner { 369fb9aa6f1SThomas Gleixner if (!strcmp(str, "off")) { 370fb9aa6f1SThomas Gleixner pci_probe = 0; 371fb9aa6f1SThomas Gleixner return NULL; 372fb9aa6f1SThomas Gleixner } else if (!strcmp(str, "bfsort")) { 373fb9aa6f1SThomas Gleixner pci_bf_sort = pci_force_bf; 374fb9aa6f1SThomas Gleixner return NULL; 375fb9aa6f1SThomas Gleixner } else if (!strcmp(str, "nobfsort")) { 376fb9aa6f1SThomas Gleixner pci_bf_sort = pci_force_nobf; 377fb9aa6f1SThomas Gleixner return NULL; 378fb9aa6f1SThomas Gleixner } 379fb9aa6f1SThomas Gleixner #ifdef CONFIG_PCI_BIOS 380fb9aa6f1SThomas Gleixner else if (!strcmp(str, "bios")) { 381fb9aa6f1SThomas Gleixner pci_probe = PCI_PROBE_BIOS; 382fb9aa6f1SThomas Gleixner return NULL; 383fb9aa6f1SThomas Gleixner } else if (!strcmp(str, "nobios")) { 384fb9aa6f1SThomas Gleixner pci_probe &= ~PCI_PROBE_BIOS; 385fb9aa6f1SThomas Gleixner return NULL; 386fb9aa6f1SThomas Gleixner } else if (!strcmp(str, "nosort")) { 387fb9aa6f1SThomas Gleixner pci_probe |= PCI_NO_SORT; 388fb9aa6f1SThomas Gleixner return NULL; 389fb9aa6f1SThomas Gleixner } else if (!strcmp(str, "biosirq")) { 390fb9aa6f1SThomas Gleixner pci_probe |= PCI_BIOS_IRQ_SCAN; 391fb9aa6f1SThomas Gleixner return NULL; 392fb9aa6f1SThomas Gleixner } else if (!strncmp(str, "pirqaddr=", 9)) { 393fb9aa6f1SThomas Gleixner pirq_table_addr = simple_strtoul(str+9, NULL, 0); 394fb9aa6f1SThomas Gleixner return NULL; 395fb9aa6f1SThomas Gleixner } 396fb9aa6f1SThomas Gleixner #endif 397fb9aa6f1SThomas Gleixner #ifdef CONFIG_PCI_DIRECT 398fb9aa6f1SThomas Gleixner else if (!strcmp(str, "conf1")) { 399fb9aa6f1SThomas Gleixner pci_probe = PCI_PROBE_CONF1 | PCI_NO_CHECKS; 400fb9aa6f1SThomas Gleixner return NULL; 401fb9aa6f1SThomas Gleixner } 402fb9aa6f1SThomas Gleixner else if (!strcmp(str, "conf2")) { 403fb9aa6f1SThomas Gleixner pci_probe = PCI_PROBE_CONF2 | PCI_NO_CHECKS; 404fb9aa6f1SThomas Gleixner return NULL; 405fb9aa6f1SThomas Gleixner } 406fb9aa6f1SThomas Gleixner #endif 407fb9aa6f1SThomas Gleixner #ifdef CONFIG_PCI_MMCONFIG 408fb9aa6f1SThomas Gleixner else if (!strcmp(str, "nommconf")) { 409fb9aa6f1SThomas Gleixner pci_probe &= ~PCI_PROBE_MMCONF; 410fb9aa6f1SThomas Gleixner return NULL; 411fb9aa6f1SThomas Gleixner } 412fb9aa6f1SThomas Gleixner #endif 413fb9aa6f1SThomas Gleixner else if (!strcmp(str, "noacpi")) { 414fb9aa6f1SThomas Gleixner acpi_noirq_set(); 415fb9aa6f1SThomas Gleixner return NULL; 416fb9aa6f1SThomas Gleixner } 417fb9aa6f1SThomas Gleixner else if (!strcmp(str, "noearly")) { 418fb9aa6f1SThomas Gleixner pci_probe |= PCI_PROBE_NOEARLY; 419fb9aa6f1SThomas Gleixner return NULL; 420fb9aa6f1SThomas Gleixner } 421fb9aa6f1SThomas Gleixner #ifndef CONFIG_X86_VISWS 422fb9aa6f1SThomas Gleixner else if (!strcmp(str, "usepirqmask")) { 423fb9aa6f1SThomas Gleixner pci_probe |= PCI_USE_PIRQ_MASK; 424fb9aa6f1SThomas Gleixner return NULL; 425fb9aa6f1SThomas Gleixner } else if (!strncmp(str, "irqmask=", 8)) { 426fb9aa6f1SThomas Gleixner pcibios_irq_mask = simple_strtol(str+8, NULL, 0); 427fb9aa6f1SThomas Gleixner return NULL; 428fb9aa6f1SThomas Gleixner } else if (!strncmp(str, "lastbus=", 8)) { 429fb9aa6f1SThomas Gleixner pcibios_last_bus = simple_strtol(str+8, NULL, 0); 430fb9aa6f1SThomas Gleixner return NULL; 431fb9aa6f1SThomas Gleixner } 432fb9aa6f1SThomas Gleixner #endif 433fb9aa6f1SThomas Gleixner else if (!strcmp(str, "rom")) { 434fb9aa6f1SThomas Gleixner pci_probe |= PCI_ASSIGN_ROMS; 435fb9aa6f1SThomas Gleixner return NULL; 436fb9aa6f1SThomas Gleixner } else if (!strcmp(str, "assign-busses")) { 437fb9aa6f1SThomas Gleixner pci_probe |= PCI_ASSIGN_ALL_BUSSES; 438fb9aa6f1SThomas Gleixner return NULL; 43962f420f8SGary Hade } else if (!strcmp(str, "use_crs")) { 44062f420f8SGary Hade pci_probe |= PCI_USE__CRS; 44162f420f8SGary Hade return NULL; 442fb9aa6f1SThomas Gleixner } else if (!strcmp(str, "routeirq")) { 443fb9aa6f1SThomas Gleixner pci_routeirq = 1; 444fb9aa6f1SThomas Gleixner return NULL; 445fb9aa6f1SThomas Gleixner } 446fb9aa6f1SThomas Gleixner return str; 447fb9aa6f1SThomas Gleixner } 448fb9aa6f1SThomas Gleixner 449fb9aa6f1SThomas Gleixner unsigned int pcibios_assign_all_busses(void) 450fb9aa6f1SThomas Gleixner { 451fb9aa6f1SThomas Gleixner return (pci_probe & PCI_ASSIGN_ALL_BUSSES) ? 1 : 0; 452fb9aa6f1SThomas Gleixner } 453fb9aa6f1SThomas Gleixner 454fb9aa6f1SThomas Gleixner int pcibios_enable_device(struct pci_dev *dev, int mask) 455fb9aa6f1SThomas Gleixner { 456fb9aa6f1SThomas Gleixner int err; 457fb9aa6f1SThomas Gleixner 458fb9aa6f1SThomas Gleixner if ((err = pcibios_enable_resources(dev, mask)) < 0) 459fb9aa6f1SThomas Gleixner return err; 460fb9aa6f1SThomas Gleixner 461fb9aa6f1SThomas Gleixner if (!dev->msi_enabled) 462fb9aa6f1SThomas Gleixner return pcibios_enable_irq(dev); 463fb9aa6f1SThomas Gleixner return 0; 464fb9aa6f1SThomas Gleixner } 465fb9aa6f1SThomas Gleixner 466fb9aa6f1SThomas Gleixner void pcibios_disable_device (struct pci_dev *dev) 467fb9aa6f1SThomas Gleixner { 468fb9aa6f1SThomas Gleixner if (!dev->msi_enabled && pcibios_disable_irq) 469fb9aa6f1SThomas Gleixner pcibios_disable_irq(dev); 470fb9aa6f1SThomas Gleixner } 471fb9aa6f1SThomas Gleixner 472fb9aa6f1SThomas Gleixner struct pci_bus *pci_scan_bus_with_sysdata(int busno) 473fb9aa6f1SThomas Gleixner { 474fb9aa6f1SThomas Gleixner struct pci_bus *bus = NULL; 475fb9aa6f1SThomas Gleixner struct pci_sysdata *sd; 476fb9aa6f1SThomas Gleixner 477fb9aa6f1SThomas Gleixner /* 478fb9aa6f1SThomas Gleixner * Allocate per-root-bus (not per bus) arch-specific data. 479fb9aa6f1SThomas Gleixner * TODO: leak; this memory is never freed. 480fb9aa6f1SThomas Gleixner * It's arguable whether it's worth the trouble to care. 481fb9aa6f1SThomas Gleixner */ 482fb9aa6f1SThomas Gleixner sd = kzalloc(sizeof(*sd), GFP_KERNEL); 483fb9aa6f1SThomas Gleixner if (!sd) { 484fb9aa6f1SThomas Gleixner printk(KERN_ERR "PCI: OOM, skipping PCI bus %02x\n", busno); 485fb9aa6f1SThomas Gleixner return NULL; 486fb9aa6f1SThomas Gleixner } 487fb9aa6f1SThomas Gleixner sd->node = -1; 488fb9aa6f1SThomas Gleixner bus = pci_scan_bus(busno, &pci_root_ops, sd); 489fb9aa6f1SThomas Gleixner if (!bus) 490fb9aa6f1SThomas Gleixner kfree(sd); 491fb9aa6f1SThomas Gleixner 492fb9aa6f1SThomas Gleixner return bus; 493fb9aa6f1SThomas Gleixner } 494