diff options
Diffstat (limited to 'arch/i386/pci/irq.c')
| -rw-r--r-- | arch/i386/pci/irq.c | 1119 |
1 files changed, 1119 insertions, 0 deletions
diff --git a/arch/i386/pci/irq.c b/arch/i386/pci/irq.c new file mode 100644 index 0000000..1128451 --- /dev/null +++ b/arch/i386/pci/irq.c @@ -0,0 +1,1119 @@ +/* + * Low-Level PCI Support for PC -- Routing of Interrupts + * + * (c) 1999--2000 Martin Mares <mj@ucw.cz> + */ + +#include <linux/config.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/dmi.h> +#include <asm/io.h> +#include <asm/smp.h> +#include <asm/io_apic.h> +#include <asm/hw_irq.h> +#include <linux/acpi.h> + +#include "pci.h" + +#define PIRQ_SIGNATURE (('$' << 0) + ('P' << 8) + ('I' << 16) + ('R' << 24)) +#define PIRQ_VERSION 0x0100 + +static int broken_hp_bios_irq9; +static int acer_tm360_irqrouting; + +static struct irq_routing_table *pirq_table; + +static int pirq_enable_irq(struct pci_dev *dev); + +/* + * Never use: 0, 1, 2 (timer, keyboard, and cascade) + * Avoid using: 13, 14 and 15 (FP error and IDE). + * Penalize: 3, 4, 6, 7, 12 (known ISA uses: serial, floppy, parallel and mouse) + */ +unsigned int pcibios_irq_mask = 0xfff8; + +static int pirq_penalty[16] = { + 1000000, 1000000, 1000000, 1000, 1000, 0, 1000, 1000, + 0, 0, 0, 0, 1000, 100000, 100000, 100000 +}; + +struct irq_router { + char *name; + u16 vendor, device; + int (*get)(struct pci_dev *router, struct pci_dev *dev, int pirq); + int (*set)(struct pci_dev *router, struct pci_dev *dev, int pirq, int new); +}; + +struct irq_router_handler { + u16 vendor; + int (*probe)(struct irq_router *r, struct pci_dev *router, u16 device); +}; + +int (*pcibios_enable_irq)(struct pci_dev *dev) = NULL; + +/* + * Search 0xf0000 -- 0xfffff for the PCI IRQ Routing Table. + */ + +static struct irq_routing_table * __init pirq_find_routing_table(void) +{ + u8 *addr; + struct irq_routing_table *rt; + int i; + u8 sum; + + for(addr = (u8 *) __va(0xf0000); addr < (u8 *) __va(0x100000); addr += 16) { + rt = (struct irq_routing_table *) addr; + if (rt->signature != PIRQ_SIGNATURE || + rt->version != PIRQ_VERSION || + rt->size % 16 || + rt->size < sizeof(struct irq_routing_table)) + continue; + sum = 0; + for(i=0; i<rt->size; i++) + sum += addr[i]; + if (!sum) { + DBG("PCI: Interrupt Routing Table found at 0x%p\n", rt); + return rt; + } + } + return NULL; +} + +/* + * If we have a IRQ routing table, use it to search for peer host + * bridges. It's a gross hack, but since there are no other known + * ways how to get a list of buses, we have to go this way. + */ + +static void __init pirq_peer_trick(void) +{ + struct irq_routing_table *rt = pirq_table; + u8 busmap[256]; + int i; + struct irq_info *e; + + memset(busmap, 0, sizeof(busmap)); + for(i=0; i < (rt->size - sizeof(struct irq_routing_table)) / sizeof(struct irq_info); i++) { + e = &rt->slots[i]; +#ifdef DEBUG + { + int j; + DBG("%02x:%02x slot=%02x", e->bus, e->devfn/8, e->slot); + for(j=0; j<4; j++) + DBG(" %d:%02x/%04x", j, e->irq[j].link, e->irq[j].bitmap); + DBG("\n"); + } +#endif + busmap[e->bus] = 1; + } + for(i = 1; i < 256; i++) { + if (!busmap[i] || pci_find_bus(0, i)) + continue; + if (pci_scan_bus(i, &pci_root_ops, NULL)) + printk(KERN_INFO "PCI: Discovered primary peer bus %02x [IRQ]\n", i); + } + pcibios_last_bus = -1; +} + +/* + * Code for querying and setting of IRQ routes on various interrupt routers. + */ + +void eisa_set_level_irq(unsigned int irq) +{ + unsigned char mask = 1 << (irq & 7); + unsigned int port = 0x4d0 + (irq >> 3); + unsigned char val; + static u16 eisa_irq_mask; + + if (irq >= 16 || (1 << irq) & eisa_irq_mask) + return; + + eisa_irq_mask |= (1 << irq); + printk("PCI: setting IRQ %u as level-triggered\n", irq); + val = inb(port); + if (!(val & mask)) { + DBG(" -> edge"); + outb(val | mask, port); + } +} + +/* + * Common IRQ routing practice: nybbles in config space, + * offset by some magic constant. + */ +static unsigned int read_config_nybble(struct pci_dev *router, unsigned offset, unsigned nr) +{ + u8 x; + unsigned reg = offset + (nr >> 1); + + pci_read_config_byte(router, reg, &x); + return (nr & 1) ? (x >> 4) : (x & 0xf); +} + +static void write_config_nybble(struct pci_dev *router, unsigned offset, unsigned nr, unsigned int val) +{ + u8 x; + unsigned reg = offset + (nr >> 1); + + pci_read_config_byte(router, reg, &x); + x = (nr & 1) ? ((x & 0x0f) | (val << 4)) : ((x & 0xf0) | val); + pci_write_config_byte(router, reg, x); +} + +/* + * ALI pirq entries are damn ugly, and completely undocumented. + * This has been figured out from pirq tables, and it's not a pretty + * picture. + */ +static int pirq_ali_get(struct pci_dev *router, struct pci_dev *dev, int pirq) +{ + static unsigned char irqmap[16] = { 0, 9, 3, 10, 4, 5, 7, 6, 1, 11, 0, 12, 0, 14, 0, 15 }; + + return irqmap[read_config_nybble(router, 0x48, pirq-1)]; +} + +static int pirq_ali_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) +{ + static unsigned char irqmap[16] = { 0, 8, 0, 2, 4, 5, 7, 6, 0, 1, 3, 9, 11, 0, 13, 15 }; + unsigned int val = irqmap[irq]; + + if (val) { + write_config_nybble(router, 0x48, pirq-1, val); + return 1; + } + return 0; +} + +/* + * The Intel PIIX4 pirq rules are fairly simple: "pirq" is + * just a pointer to the config space. + */ +static int pirq_piix_get(struct pci_dev *router, struct pci_dev *dev, int pirq) +{ + u8 x; + + pci_read_config_byte(router, pirq, &x); + return (x < 16) ? x : 0; +} + +static int pirq_piix_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) +{ + pci_write_config_byte(router, pirq, irq); + return 1; +} + +/* + * The VIA pirq rules are nibble-based, like ALI, + * but without the ugly irq number munging. + * However, PIRQD is in the upper instead of lower 4 bits. + */ +static int pirq_via_get(struct pci_dev *router, struct pci_dev *dev, int pirq) +{ + return read_config_nybble(router, 0x55, pirq == 4 ? 5 : pirq); +} + +static int pirq_via_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) +{ + write_config_nybble(router, 0x55, pirq == 4 ? 5 : pirq, irq); + return 1; +} + +/* + * ITE 8330G pirq rules are nibble-based + * FIXME: pirqmap may be { 1, 0, 3, 2 }, + * 2+3 are both mapped to irq 9 on my system + */ +static int pirq_ite_get(struct pci_dev *router, struct pci_dev *dev, int pirq) +{ + static unsigned char pirqmap[4] = { 1, 0, 2, 3 }; + return read_config_nybble(router,0x43, pirqmap[pirq-1]); +} + +static int pirq_ite_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) +{ + static unsigned char pirqmap[4] = { 1, 0, 2, 3 }; + write_config_nybble(router, 0x43, pirqmap[pirq-1], irq); + return 1; +} + +/* + * OPTI: high four bits are nibble pointer.. + * I wonder what the low bits do? + */ +static int pirq_opti_get(struct pci_dev *router, struct pci_dev *dev, int pirq) +{ + return read_config_nybble(router, 0xb8, pirq >> 4); +} + +static int pirq_opti_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) +{ + write_config_nybble(router, 0xb8, pirq >> 4, irq); + return 1; +} + +/* + * Cyrix: nibble offset 0x5C + * 0x5C bits 7:4 is INTB bits 3:0 is INTA + * 0x5D bits 7:4 is INTD bits 3:0 is INTC + */ +static int pirq_cyrix_get(struct pci_dev *router, struct pci_dev *dev, int pirq) +{ + return read_config_nybble(router, 0x5C, (pirq-1)^1); +} + +static int pirq_cyrix_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) +{ + write_config_nybble(router, 0x5C, (pirq-1)^1, irq); + return 1; +} + +/* + * PIRQ routing for SiS 85C503 router used in several SiS chipsets. + * We have to deal with the following issues here: + * - vendors have different ideas about the meaning of link values + * - some onboard devices (integrated in the chipset) have special + * links and are thus routed differently (i.e. not via PCI INTA-INTD) + * - different revision of the router have a different layout for + * the routing registers, particularly for the onchip devices + * + * For all routing registers the common thing is we have one byte + * per routeable link which is defined as: + * bit 7 IRQ mapping enabled (0) or disabled (1) + * bits [6:4] reserved (sometimes used for onchip devices) + * bits [3:0] IRQ to map to + * allowed: 3-7, 9-12, 14-15 + * reserved: 0, 1, 2, 8, 13 + * + * The config-space registers located at 0x41/0x42/0x43/0x44 are + * always used to route the normal PCI INT A/B/C/D respectively. + * Apparently there are systems implementing PCI routing table using + * link values 0x01-0x04 and others using 0x41-0x44 for PCI INTA..D. + * We try our best to handle both link mappings. + * + * Currently (2003-05-21) it appears most SiS chipsets follow the + * definition of routing registers from the SiS-5595 southbridge. + * According to the SiS 5595 datasheets the revision id's of the + * router (ISA-bridge) should be 0x01 or 0xb0. + * + * Furthermore we've also seen lspci dumps with revision 0x00 and 0xb1. + * Looks like these are used in a number of SiS 5xx/6xx/7xx chipsets. + * They seem to work with the current routing code. However there is + * some concern because of the two USB-OHCI HCs (original SiS 5595 + * had only one). YMMV. + * + * Onchip routing for router rev-id 0x01/0xb0 and probably 0x00/0xb1: + * + * 0x61: IDEIRQ: + * bits [6:5] must be written 01 + * bit 4 channel-select primary (0), secondary (1) + * + * 0x62: USBIRQ: + * bit 6 OHCI function disabled (0), enabled (1) + * + * 0x6a: ACPI/SCI IRQ: bits 4-6 reserved + * + * 0x7e: Data Acq. Module IRQ - bits 4-6 reserved + * + * We support USBIRQ (in addition to INTA-INTD) and keep the + * IDE, ACPI and DAQ routing untouched as set by the BIOS. + * + * Currently the only reported exception is the new SiS 65x chipset + * which includes the SiS 69x southbridge. Here we have the 85C503 + * router revision 0x04 and there are changes in the register layout + * mostly related to the different USB HCs with USB 2.0 support. + * + * Onchip routing for router rev-id 0x04 (try-and-error observation) + * + * 0x60/0x61/0x62/0x63: 1xEHCI and 3xOHCI (companion) USB-HCs + * bit 6-4 are probably unused, not like 5595 + */ + +#define PIRQ_SIS_IRQ_MASK 0x0f +#define PIRQ_SIS_IRQ_DISABLE 0x80 +#define PIRQ_SIS_USB_ENABLE 0x40 + +static int pirq_sis_get(struct pci_dev *router, struct pci_dev *dev, int pirq) +{ + u8 x; + int reg; + + reg = pirq; + if (reg >= 0x01 && reg <= 0x04) + reg += 0x40; + pci_read_config_byte(router, reg, &x); + return (x & PIRQ_SIS_IRQ_DISABLE) ? 0 : (x & PIRQ_SIS_IRQ_MASK); +} + +static int pirq_sis_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) +{ + u8 x; + int reg; + + reg = pirq; + if (reg >= 0x01 && reg <= 0x04) + reg += 0x40; + pci_read_config_byte(router, reg, &x); + x &= ~(PIRQ_SIS_IRQ_MASK | PIRQ_SIS_IRQ_DISABLE); + x |= irq ? irq: PIRQ_SIS_IRQ_DISABLE; + pci_write_config_byte(router, reg, x); + return 1; +} + + +/* + * VLSI: nibble offset 0x74 - educated guess due to routing table and + * config space of VLSI 82C534 PCI-bridge/router (1004:0102) + * Tested on HP OmniBook 800 covering PIRQ 1, 2, 4, 8 for onboard + * devices, PIRQ 3 for non-pci(!) soundchip and (untested) PIRQ 6 + * for the busbridge to the docking station. + */ + +static int pirq_vlsi_get(struct pci_dev *router, struct pci_dev *dev, int pirq) +{ + if (pirq > 8) { + printk(KERN_INFO "VLSI router pirq escape (%d)\n", pirq); + return 0; + } + return read_config_nybble(router, 0x74, pirq-1); +} + +static int pirq_vlsi_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) +{ + if (pirq > 8) { + printk(KERN_INFO "VLSI router pirq escape (%d)\n", pirq); + return 0; + } + write_config_nybble(router, 0x74, pirq-1, irq); + return 1; +} + +/* + * ServerWorks: PCI interrupts mapped to system IRQ lines through Index + * and Redirect I/O registers (0x0c00 and 0x0c01). The Index register + * format is (PCIIRQ## | 0x10), e.g.: PCIIRQ10=0x1a. The Redirect + * register is a straight binary coding of desired PIC IRQ (low nibble). + * + * The 'link' value in the PIRQ table is already in the correct format + * for the Index register. There are some special index values: + * 0x00 for ACPI (SCI), 0x01 for USB, 0x02 for IDE0, 0x04 for IDE1, + * and 0x03 for SMBus. + */ +static int pirq_serverworks_get(struct pci_dev *router, struct pci_dev *dev, int pirq) +{ + outb_p(pirq, 0xc00); + return inb(0xc01) & 0xf; +} + +static int pirq_serverworks_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) +{ + outb_p(pirq, 0xc00); + outb_p(irq, 0xc01); + return 1; +} + +/* Support for AMD756 PCI IRQ Routing + * Jhon H. Caicedo <jhcaiced@osso.org.co> + * Jun/21/2001 0.2.0 Release, fixed to use "nybble" functions... (jhcaiced) + * Jun/19/2001 Alpha Release 0.1.0 (jhcaiced) + * The AMD756 pirq rules are nibble-based + * offset 0x56 0-3 PIRQA 4-7 PIRQB + * offset 0x57 0-3 PIRQC 4-7 PIRQD + */ +static int pirq_amd756_get(struct pci_dev *router, struct pci_dev *dev, int pirq) +{ + u8 irq; + irq = 0; + if (pirq <= 4) + { + irq = read_config_nybble(router, 0x56, pirq - 1); + } + printk(KERN_INFO "AMD756: dev %04x:%04x, router pirq : %d get irq : %2d\n", + dev->vendor, dev->device, pirq, irq); + return irq; +} + +static int pirq_amd756_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) +{ + printk(KERN_INFO "AMD756: dev %04x:%04x, router pirq : %d SET irq : %2d\n", + dev->vendor, dev->device, pirq, irq); + if (pirq <= 4) + { + write_config_nybble(router, 0x56, pirq - 1, irq); + } + return 1; +} + +#ifdef CONFIG_PCI_BIOS + +static int pirq_bios_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) +{ + struct pci_dev *bridge; + int pin = pci_get_interrupt_pin(dev, &bridge); + return pcibios_set_irq_routing(bridge, pin, irq); +} + +#endif + +static __init int intel_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) +{ + static struct pci_device_id pirq_440gx[] = { + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443GX_0) }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443GX_2) }, + { }, + }; + + /* 440GX has a proprietary PIRQ router -- don't use it */ + if (pci_dev_present(pirq_440gx)) + return 0; + + switch(device) + { + case PCI_DEVICE_ID_INTEL_82371FB_0: + case PCI_DEVICE_ID_INTEL_82371SB_0: + case PCI_DEVICE_ID_INTEL_82371AB_0: + case PCI_DEVICE_ID_INTEL_82371MX: + case PCI_DEVICE_ID_INTEL_82443MX_0: + case PCI_DEVICE_ID_INTEL_82801AA_0: + case PCI_DEVICE_ID_INTEL_82801AB_0: + case PCI_DEVICE_ID_INTEL_82801BA_0: + case PCI_DEVICE_ID_INTEL_82801BA_10: + case PCI_DEVICE_ID_INTEL_82801CA_0: + case PCI_DEVICE_ID_INTEL_82801CA_12: + case PCI_DEVICE_ID_INTEL_82801DB_0: + case PCI_DEVICE_ID_INTEL_82801E_0: + case PCI_DEVICE_ID_INTEL_82801EB_0: + case PCI_DEVICE_ID_INTEL_ESB_1: + case PCI_DEVICE_ID_INTEL_ICH6_0: + case PCI_DEVICE_ID_INTEL_ICH6_1: + case PCI_DEVICE_ID_INTEL_ICH7_0: + case PCI_DEVICE_ID_INTEL_ICH7_1: + r->name = "PIIX/ICH"; + r->get = pirq_piix_get; + r->set = pirq_piix_set; + return 1; + } + return 0; +} + +static __init int via_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) +{ + /* FIXME: We should move some of the quirk fixup stuff here */ + switch(device) + { + case PCI_DEVICE_ID_VIA_82C586_0: + case PCI_DEVICE_ID_VIA_82C596: + case PCI_DEVICE_ID_VIA_82C686: + case PCI_DEVICE_ID_VIA_8231: + /* FIXME: add new ones for 8233/5 */ + r->name = "VIA"; + r->get = pirq_via_get; + r->set = pirq_via_set; + return 1; + } + return 0; +} + +static __init int vlsi_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) +{ + switch(device) + { + case PCI_DEVICE_ID_VLSI_82C534: + r->name = "VLSI 82C534"; + r->get = pirq_vlsi_get; + r->set = pirq_vlsi_set; + return 1; + } + return 0; +} + + +static __init int serverworks_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) +{ + switch(device) + { + case PCI_DEVICE_ID_SERVERWORKS_OSB4: + case PCI_DEVICE_ID_SERVERWORKS_CSB5: + r->name = "ServerWorks"; + r->get = pirq_serverworks_get; + r->set = pirq_serverworks_set; + return 1; + } + return 0; +} + +static __init int sis_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) +{ + if (device != PCI_DEVICE_ID_SI_503) + return 0; + + r->name = "SIS"; + r->get = pirq_sis_get; + r->set = pirq_sis_set; + return 1; +} + +static __init int cyrix_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) +{ + switch(device) + { + case PCI_DEVICE_ID_CYRIX_5520: + r->name = "NatSemi"; + r->get = pirq_cyrix_get; + r->set = pirq_cyrix_set; + return 1; + } + return 0; +} + +static __init int opti_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) +{ + switch(device) + { + case PCI_DEVICE_ID_OPTI_82C700: + r->name = "OPTI"; + r->get = pirq_opti_get; + r->set = pirq_opti_set; + return 1; + } + return 0; +} + +static __init int ite_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) +{ + switch(device) + { + case PCI_DEVICE_ID_ITE_IT8330G_0: + r->name = "ITE"; + r->get = pirq_ite_get; + r->set = pirq_ite_set; + return 1; + } + return 0; +} + +static __init int ali_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) +{ + switch(device) + { + case PCI_DEVICE_ID_AL_M1533: + case PCI_DEVICE_ID_AL_M1563: + printk("PCI: Using ALI IRQ Router\n"); + r->name = "ALI"; + r->get = pirq_ali_get; + r->set = pirq_ali_set; + return 1; + } + return 0; +} + +static __init int amd_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) +{ + switch(device) + { + case PCI_DEVICE_ID_AMD_VIPER_740B: + r->name = "AMD756"; + break; + case PCI_DEVICE_ID_AMD_VIPER_7413: + r->name = "AMD766"; + break; + case PCI_DEVICE_ID_AMD_VIPER_7443: + r->name = "AMD768"; + break; + default: + return 0; + } + r->get = pirq_amd756_get; + r->set = pirq_amd756_set; + return 1; +} + +static __initdata struct irq_router_handler pirq_routers[] = { + { PCI_VENDOR_ID_INTEL, intel_router_probe }, + { PCI_VENDOR_ID_AL, ali_router_probe }, + { PCI_VENDOR_ID_ITE, ite_router_probe }, + { PCI_VENDOR_ID_VIA, via_router_probe }, + { PCI_VENDOR_ID_OPTI, opti_router_probe }, + { PCI_VENDOR_ID_SI, sis_router_probe }, + { PCI_VENDOR_ID_CYRIX, cyrix_router_probe }, + { PCI_VENDOR_ID_VLSI, vlsi_router_probe }, + { PCI_VENDOR_ID_SERVERWORKS, serverworks_router_probe }, + { PCI_VENDOR_ID_AMD, amd_router_probe }, + /* Someone with docs needs to add the ATI Radeon IGP */ + { 0, NULL } +}; +static struct irq_router pirq_router; +static struct pci_dev *pirq_router_dev; + + +/* + * FIXME: should we have an option to say "generic for + * chipset" ? + */ + +static void __init pirq_find_router(struct irq_router *r) +{ + struct irq_routing_table *rt = pirq_table; + struct irq_router_handler *h; + +#ifdef CONFIG_PCI_BIOS + if (!rt->signature) { + printk(KERN_INFO "PCI: Using BIOS for IRQ routing\n"); + r->set = pirq_bios_set; + r->name = "BIOS"; + return; + } +#endif + + /* Default unless a driver reloads it */ + r->name = "default"; + r->get = NULL; + r->set = NULL; + + DBG("PCI: Attempting to find IRQ router for %04x:%04x\n", + rt->rtr_vendor, rt->rtr_device); + + pirq_router_dev = pci_find_slot(rt->rtr_bus, rt->rtr_devfn); + if (!pirq_router_dev) { + DBG("PCI: Interrupt router not found at %02x:%02x\n", rt->rtr_bus, rt->rtr_devfn); + return; + } + + for( h = pirq_routers; h->vendor; h++) { + /* First look for a router match */ + if (rt->rtr_vendor == h->vendor && h->probe(r, pirq_router_dev, rt->rtr_device)) + break; + /* Fall back to a device match */ + if (pirq_router_dev->vendor == h->vendor && h->probe(r, pirq_router_dev, pirq_router_dev->device)) + break; + } + printk(KERN_INFO "PCI: Using IRQ router %s [%04x/%04x] at %s\n", + pirq_router.name, + pirq_router_dev->vendor, + pirq_router_dev->device, + pci_name(pirq_router_dev)); +} + +static struct irq_info *pirq_get_info(struct pci_dev *dev) +{ + struct irq_routing_table *rt = pirq_table; + int entries = (rt->size - sizeof(struct irq_routing_table)) / sizeof(struct irq_info); + struct irq_info *info; + + for (info = rt->slots; entries--; info++) + if (info->bus == dev->bus->number && PCI_SLOT(info->devfn) == PCI_SLOT(dev->devfn)) + return info; + return NULL; +} + +static int pcibios_lookup_irq(struct pci_dev *dev, int assign) +{ + u8 pin; + struct irq_info *info; + int i, pirq, newirq; + int irq = 0; + u32 mask; + struct irq_router *r = &pirq_router; + struct pci_dev *dev2 = NULL; + char *msg = NULL; + + /* Find IRQ pin */ + pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin); + if (!pin) { + DBG(" -> no interrupt pin\n"); + return 0; + } + pin = pin - 1; + + /* Find IRQ routing entry */ + + if (!pirq_table) + return 0; + + DBG("IRQ for %s[%c]", pci_name(dev), 'A' + pin); + info = pirq_get_info(dev); + if (!info) { + DBG(" -> not found in routing table\n"); + return 0; + } + pirq = info->irq[pin].link; + mask = info->irq[pin].bitmap; + if (!pirq) { + DBG(" -> not routed\n"); + return 0; + } + DBG(" -> PIRQ %02x, mask %04x, excl %04x", pirq, mask, pirq_table->exclusive_irqs); + mask &= pcibios_irq_mask; + + /* Work around broken HP Pavilion Notebooks which assign USB to + IRQ 9 even though it is actually wired to IRQ 11 */ + + if (broken_hp_bios_irq9 && pirq == 0x59 && dev->irq == 9) { + dev->irq = 11; + pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 11); + r->set(pirq_router_dev, dev, pirq, 11); + } + + /* same for Acer Travelmate 360, but with CB and irq 11 -> 10 */ + if (acer_tm360_irqrouting && dev->irq == 11 && dev->vendor == PCI_VENDOR_ID_O2) { + pirq = 0x68; + mask = 0x400; + dev->irq = r->get(pirq_router_dev, dev, pirq); + pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq); + } + + /* + * Find the best IRQ to assign: use the one + * reported by the device if possible. + */ + newirq = dev->irq; + if (!((1 << newirq) & mask)) { + if ( pci_probe & PCI_USE_PIRQ_MASK) newirq = 0; + else printk(KERN_WARNING "PCI: IRQ %i for device %s doesn't match PIRQ mask - try pci=usepirqmask\n", newirq, pci_name(dev)); + } + if (!newirq && assign) { + for (i = 0; i < 16; i++) { + if (!(mask & (1 << i))) + continue; + if (pirq_penalty[i] < pirq_penalty[newirq] && can_request_irq(i, SA_SHIRQ)) + newirq = i; + } + } + DBG(" -> newirq=%d", newirq); + + /* Check if it is hardcoded */ + if ((pirq & 0xf0) == 0xf0) { + irq = pirq & 0xf; + DBG(" -> hardcoded IRQ %d\n", irq); + msg = "Hardcoded"; + } else if ( r->get && (irq = r->get(pirq_router_dev, dev, pirq)) && \ + ((!(pci_probe & PCI_USE_PIRQ_MASK)) || ((1 << irq) & mask)) ) { + DBG(" -> got IRQ %d\n", irq); + msg = "Found"; + } else if (newirq && r->set && (dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) { + DBG(" -> assigning IRQ %d", newirq); + if (r->set(pirq_router_dev, dev, pirq, newirq)) { + eisa_set_level_irq(newirq); + DBG(" ... OK\n"); + msg = "Assigned"; + irq = newirq; + } + } + + if (!irq) { + DBG(" ... failed\n"); + if (newirq && mask == (1 << newirq)) { + msg = "Guessed"; + irq = newirq; + } else + return 0; + } + printk(KERN_INFO "PCI: %s IRQ %d for device %s\n", msg, irq, pci_name(dev)); + + /* Update IRQ for all devices with the same pirq value */ + while ((dev2 = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev2)) != NULL) { + pci_read_config_byte(dev2, PCI_INTERRUPT_PIN, &pin); + if (!pin) + continue; + pin--; + info = pirq_get_info(dev2); + if (!info) + continue; + if (info->irq[pin].link == pirq) { + /* We refuse to override the dev->irq information. Give a warning! */ + if ( dev2->irq && dev2->irq != irq && \ + (!(pci_probe & PCI_USE_PIRQ_MASK) || \ + ((1 << dev2->irq) & mask)) ) { +#ifndef CONFIG_PCI_MSI + printk(KERN_INFO "IRQ routing conflict for %s, have irq %d, want irq %d\n", + pci_name(dev2), dev2->irq, irq); +#endif + continue; + } + dev2->irq = irq; + pirq_penalty[irq]++; + if (dev != dev2) + printk(KERN_INFO "PCI: Sharing IRQ %d with %s\n", irq, pci_name(dev2)); + } + } + return 1; +} + +static void __init pcibios_fixup_irqs(void) +{ + struct pci_dev *dev = NULL; + u8 pin; + + DBG("PCI: IRQ fixup\n"); + while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { + /* + * If the BIOS has set an out of range IRQ number, just ignore it. + * Also keep track of which IRQ's are already in use. + */ + if (dev->irq >= 16) { + DBG("%s: ignoring bogus IRQ %d\n", pci_name(dev), dev->irq); + dev->irq = 0; + } + /* If the IRQ is already assigned to a PCI device, ignore its ISA use penalty */ + if (pirq_penalty[dev->irq] >= 100 && pirq_penalty[dev->irq] < 100000) + pirq_penalty[dev->irq] = 0; + pirq_penalty[dev->irq]++; + } + + dev = NULL; + while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { + pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin); +#ifdef CONFIG_X86_IO_APIC + /* + * Recalculate IRQ numbers if we use the I/O APIC. + */ + if (io_apic_assign_pci_irqs) + { + int irq; + + if (pin) { + pin--; /* interrupt pins are numbered starting from 1 */ + irq = IO_APIC_get_PCI_irq_vector(dev->bus->number, PCI_SLOT(dev->devfn), pin); + /* + * Busses behind bridges are typically not listed in the MP-table. + * In this case we have to look up the IRQ based on the parent bus, + * parent slot, and pin number. The SMP code detects such bridged + * busses itself so we should get into this branch reliably. + */ + if (irq < 0 && dev->bus->parent) { /* go back to the bridge */ + struct pci_dev * bridge = dev->bus->self; + + pin = (pin + PCI_SLOT(dev->devfn)) % 4; + irq = IO_APIC_get_PCI_irq_vector(bridge->bus->number, + PCI_SLOT(bridge->devfn), pin); + if (irq >= 0) + printk(KERN_WARNING "PCI: using PPB %s[%c] to get irq %d\n", + pci_name(bridge), 'A' + pin, irq); + } + if (irq >= 0) { + if (use_pci_vector() && + !platform_legacy_irq(irq)) + irq = IO_APIC_VECTOR(irq); + + printk(KERN_INFO "PCI->APIC IRQ transform: %s[%c] -> IRQ %d\n", + pci_name(dev), 'A' + pin, irq); + dev->irq = irq; + } + } + } +#endif + /* + * Still no IRQ? Try to lookup one... + */ + if (pin && !dev->irq) + pcibios_lookup_irq(dev, 0); + } +} + +/* + * Work around broken HP Pavilion Notebooks which assign USB to + * IRQ 9 even though it is actually wired to IRQ 11 + */ +static int __init fix_broken_hp_bios_irq9(struct dmi_system_id *d) +{ + if (!broken_hp_bios_irq9) { + broken_hp_bios_irq9 = 1; + printk(KERN_INFO "%s detected - fixing broken IRQ routing\n", d->ident); + } + return 0; +} + +/* + * Work around broken Acer TravelMate 360 Notebooks which assign + * Cardbus to IRQ 11 even though it is actually wired to IRQ 10 + */ +static int __init fix_acer_tm360_irqrouting(struct dmi_system_id *d) +{ + if (!acer_tm360_irqrouting) { + acer_tm360_irqrouting = 1; + printk(KERN_INFO "%s detected - fixing broken IRQ routing\n", d->ident); + } + return 0; +} + +static struct dmi_system_id __initdata pciirq_dmi_table[] = { + { + .callback = fix_broken_hp_bios_irq9, + .ident = "HP Pavilion N5400 Series Laptop", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_BIOS_VERSION, "GE.M1.03"), + DMI_MATCH(DMI_PRODUCT_VERSION, "HP Pavilion Notebook Model GE"), + DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"), + }, + }, + { + .callback = fix_acer_tm360_irqrouting, + .ident = "Acer TravelMate 36x Laptop", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), + }, + }, + { } +}; + +static int __init pcibios_irq_init(void) +{ + DBG("PCI: IRQ init\n"); + + if (pcibios_enable_irq || raw_pci_ops == NULL) + return 0; + + dmi_check_system(pciirq_dmi_table); + + pirq_table = pirq_find_routing_table(); + +#ifdef CONFIG_PCI_BIOS + if (!pirq_table && (pci_probe & PCI_BIOS_IRQ_SCAN)) + pirq_table = pcibios_get_irq_routing_table(); +#endif + if (pirq_table) { + pirq_peer_trick(); + pirq_find_router(&pirq_router); + if (pirq_table->exclusive_irqs) { + int i; + for (i=0; i<16; i++) + if (!(pirq_table->exclusive_irqs & (1 << i))) + pirq_penalty[i] += 100; + } + /* If we're using the I/O APIC, avoid using the PCI IRQ routing table */ + if (io_apic_assign_pci_irqs) + pirq_table = NULL; + } + + pcibios_enable_irq = pirq_enable_irq; + + pcibios_fixup_irqs(); + return 0; +} + +subsys_initcall(pcibios_irq_init); + + +static void pirq_penalize_isa_irq(int irq) +{ + /* + * If any ISAPnP device reports an IRQ in its list of possible + * IRQ's, we try to avoid assigning it to PCI devices. + */ + if (irq < 16) + pirq_penalty[irq] += 100; +} + +void pcibios_penalize_isa_irq(int irq) +{ +#ifdef CONFIG_ACPI_PCI + if (!acpi_noirq) + acpi_penalize_isa_irq(irq); + else +#endif + pirq_penalize_isa_irq(irq); +} + +static int pirq_enable_irq(struct pci_dev *dev) +{ + u8 pin; + extern int via_interrupt_line_quirk; + struct pci_dev *temp_dev; + + pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin); + if (pin && !pcibios_lookup_irq(dev, 1) && !dev->irq) { + char *msg = ""; + + pin--; /* interrupt pins are numbered starting from 1 */ + + if (io_apic_assign_pci_irqs) { + int irq; + + irq = IO_APIC_get_PCI_irq_vector(dev->bus->number, PCI_SLOT(dev->devfn), pin); + /* + * Busses behind bridges are typically not listed in the MP-table. + * In this case we have to look up the IRQ based on the parent bus, + * parent slot, and pin number. The SMP code detects such bridged + * busses itself so we should get into this branch reliably. + */ + temp_dev = dev; + while (irq < 0 && dev->bus->parent) { /* go back to the bridge */ + struct pci_dev * bridge = dev->bus->self; + + pin = (pin + PCI_SLOT(dev->devfn)) % 4; + irq = IO_APIC_get_PCI_irq_vector(bridge->bus->number, + PCI_SLOT(bridge->devfn), pin); + if (irq >= 0) + printk(KERN_WARNING "PCI: using PPB %s[%c] to get irq %d\n", + pci_name(bridge), 'A' + pin, irq); + dev = bridge; + } + dev = temp_dev; + if (irq >= 0) { +#ifdef CONFIG_PCI_MSI + if (!platform_legacy_irq(irq)) + irq = IO_APIC_VECTOR(irq); +#endif + printk(KERN_INFO "PCI->APIC IRQ transform: %s[%c] -> IRQ %d\n", + pci_name(dev), 'A' + pin, irq); + dev->irq = irq; + return 0; + } else + msg = " Probably buggy MP table."; + } else if (pci_probe & PCI_BIOS_IRQ_SCAN) + msg = ""; + else + msg = " Please try using pci=biosirq."; + + /* With IDE legacy devices the IRQ lookup failure is not a problem.. */ + if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE && !(dev->class & 0x5)) + return 0; + + printk(KERN_WARNING "PCI: No IRQ known for interrupt pin %c of device %s.%s\n", + 'A' + pin, pci_name(dev), msg); + } + /* VIA bridges use interrupt line for apic/pci steering across + the V-Link */ + else if (via_interrupt_line_quirk) + pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq & 15); + return 0; +} + +int pci_vector_resources(int last, int nr_released) +{ + int count = nr_released; + + int next = last; + int offset = (last % 8); + + while (next < FIRST_SYSTEM_VECTOR) { + next += 8; +#ifdef CONFIG_X86_64 + if (next == IA32_SYSCALL_VECTOR) + continue; +#else + if (next == SYSCALL_VECTOR) + continue; +#endif + count++; + if (next >= FIRST_SYSTEM_VECTOR) { + if (offset%8) { + next = FIRST_DEVICE_VECTOR + offset; + offset++; + continue; + } + count--; + } + } + + return count; +} |