1175 lines
31 KiB
C
1175 lines
31 KiB
C
/*
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* Low-Level PCI Support for PC -- Routing of Interrupts
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*
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* (c) 1999--2000 Martin Mares <mj@ucw.cz>
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*/
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#include <linux/config.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/dmi.h>
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#include <asm/io.h>
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#include <asm/smp.h>
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#include <asm/io_apic.h>
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#include <asm/hw_irq.h>
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#include <linux/acpi.h>
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#include "pci.h"
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#define PIRQ_SIGNATURE (('$' << 0) + ('P' << 8) + ('I' << 16) + ('R' << 24))
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#define PIRQ_VERSION 0x0100
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static int broken_hp_bios_irq9;
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static int acer_tm360_irqrouting;
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static struct irq_routing_table *pirq_table;
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static int pirq_enable_irq(struct pci_dev *dev);
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/*
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* Never use: 0, 1, 2 (timer, keyboard, and cascade)
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* Avoid using: 13, 14 and 15 (FP error and IDE).
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* Penalize: 3, 4, 6, 7, 12 (known ISA uses: serial, floppy, parallel and mouse)
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*/
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unsigned int pcibios_irq_mask = 0xfff8;
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static int pirq_penalty[16] = {
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1000000, 1000000, 1000000, 1000, 1000, 0, 1000, 1000,
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0, 0, 0, 0, 1000, 100000, 100000, 100000
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};
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struct irq_router {
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char *name;
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u16 vendor, device;
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int (*get)(struct pci_dev *router, struct pci_dev *dev, int pirq);
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int (*set)(struct pci_dev *router, struct pci_dev *dev, int pirq, int new);
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};
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struct irq_router_handler {
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u16 vendor;
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int (*probe)(struct irq_router *r, struct pci_dev *router, u16 device);
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};
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int (*pcibios_enable_irq)(struct pci_dev *dev) = NULL;
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void (*pcibios_disable_irq)(struct pci_dev *dev) = NULL;
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/*
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* Check passed address for the PCI IRQ Routing Table signature
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* and perform checksum verification.
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*/
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static inline struct irq_routing_table * pirq_check_routing_table(u8 *addr)
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{
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struct irq_routing_table *rt;
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int i;
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u8 sum;
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rt = (struct irq_routing_table *) addr;
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if (rt->signature != PIRQ_SIGNATURE ||
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rt->version != PIRQ_VERSION ||
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rt->size % 16 ||
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rt->size < sizeof(struct irq_routing_table))
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return NULL;
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sum = 0;
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for (i=0; i < rt->size; i++)
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sum += addr[i];
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if (!sum) {
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DBG("PCI: Interrupt Routing Table found at 0x%p\n", rt);
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return rt;
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}
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return NULL;
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}
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/*
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* Search 0xf0000 -- 0xfffff for the PCI IRQ Routing Table.
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*/
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static struct irq_routing_table * __init pirq_find_routing_table(void)
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{
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u8 *addr;
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struct irq_routing_table *rt;
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if (pirq_table_addr) {
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rt = pirq_check_routing_table((u8 *) __va(pirq_table_addr));
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if (rt)
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return rt;
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printk(KERN_WARNING "PCI: PIRQ table NOT found at pirqaddr\n");
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}
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for(addr = (u8 *) __va(0xf0000); addr < (u8 *) __va(0x100000); addr += 16) {
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rt = pirq_check_routing_table(addr);
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if (rt)
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return rt;
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}
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return NULL;
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}
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/*
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* If we have a IRQ routing table, use it to search for peer host
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* bridges. It's a gross hack, but since there are no other known
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* ways how to get a list of buses, we have to go this way.
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*/
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static void __init pirq_peer_trick(void)
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{
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struct irq_routing_table *rt = pirq_table;
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u8 busmap[256];
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int i;
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struct irq_info *e;
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memset(busmap, 0, sizeof(busmap));
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for(i=0; i < (rt->size - sizeof(struct irq_routing_table)) / sizeof(struct irq_info); i++) {
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e = &rt->slots[i];
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#ifdef DEBUG
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{
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int j;
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DBG("%02x:%02x slot=%02x", e->bus, e->devfn/8, e->slot);
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for(j=0; j<4; j++)
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DBG(" %d:%02x/%04x", j, e->irq[j].link, e->irq[j].bitmap);
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DBG("\n");
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}
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#endif
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busmap[e->bus] = 1;
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}
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for(i = 1; i < 256; i++) {
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if (!busmap[i] || pci_find_bus(0, i))
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continue;
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if (pci_scan_bus(i, &pci_root_ops, NULL))
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printk(KERN_INFO "PCI: Discovered primary peer bus %02x [IRQ]\n", i);
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}
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pcibios_last_bus = -1;
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}
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/*
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* Code for querying and setting of IRQ routes on various interrupt routers.
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*/
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void eisa_set_level_irq(unsigned int irq)
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{
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unsigned char mask = 1 << (irq & 7);
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unsigned int port = 0x4d0 + (irq >> 3);
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unsigned char val;
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static u16 eisa_irq_mask;
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if (irq >= 16 || (1 << irq) & eisa_irq_mask)
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return;
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eisa_irq_mask |= (1 << irq);
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printk("PCI: setting IRQ %u as level-triggered\n", irq);
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val = inb(port);
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if (!(val & mask)) {
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DBG(" -> edge");
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outb(val | mask, port);
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}
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}
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/*
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* Common IRQ routing practice: nybbles in config space,
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* offset by some magic constant.
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*/
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static unsigned int read_config_nybble(struct pci_dev *router, unsigned offset, unsigned nr)
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{
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u8 x;
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unsigned reg = offset + (nr >> 1);
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pci_read_config_byte(router, reg, &x);
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return (nr & 1) ? (x >> 4) : (x & 0xf);
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}
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static void write_config_nybble(struct pci_dev *router, unsigned offset, unsigned nr, unsigned int val)
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{
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u8 x;
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unsigned reg = offset + (nr >> 1);
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pci_read_config_byte(router, reg, &x);
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x = (nr & 1) ? ((x & 0x0f) | (val << 4)) : ((x & 0xf0) | val);
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pci_write_config_byte(router, reg, x);
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}
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/*
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* ALI pirq entries are damn ugly, and completely undocumented.
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* This has been figured out from pirq tables, and it's not a pretty
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* picture.
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*/
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static int pirq_ali_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
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{
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static unsigned char irqmap[16] = { 0, 9, 3, 10, 4, 5, 7, 6, 1, 11, 0, 12, 0, 14, 0, 15 };
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return irqmap[read_config_nybble(router, 0x48, pirq-1)];
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}
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static int pirq_ali_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
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{
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static unsigned char irqmap[16] = { 0, 8, 0, 2, 4, 5, 7, 6, 0, 1, 3, 9, 11, 0, 13, 15 };
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unsigned int val = irqmap[irq];
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if (val) {
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write_config_nybble(router, 0x48, pirq-1, val);
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return 1;
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}
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return 0;
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}
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/*
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* The Intel PIIX4 pirq rules are fairly simple: "pirq" is
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* just a pointer to the config space.
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*/
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static int pirq_piix_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
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{
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u8 x;
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pci_read_config_byte(router, pirq, &x);
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return (x < 16) ? x : 0;
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}
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static int pirq_piix_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
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{
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pci_write_config_byte(router, pirq, irq);
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return 1;
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}
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/*
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* The VIA pirq rules are nibble-based, like ALI,
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* but without the ugly irq number munging.
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* However, PIRQD is in the upper instead of lower 4 bits.
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*/
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static int pirq_via_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
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{
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return read_config_nybble(router, 0x55, pirq == 4 ? 5 : pirq);
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}
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static int pirq_via_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
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{
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write_config_nybble(router, 0x55, pirq == 4 ? 5 : pirq, irq);
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return 1;
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}
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/*
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* The VIA pirq rules are nibble-based, like ALI,
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* but without the ugly irq number munging.
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* However, for 82C586, nibble map is different .
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*/
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static int pirq_via586_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
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{
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static unsigned int pirqmap[4] = { 3, 2, 5, 1 };
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return read_config_nybble(router, 0x55, pirqmap[pirq-1]);
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}
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static int pirq_via586_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
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{
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static unsigned int pirqmap[4] = { 3, 2, 5, 1 };
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write_config_nybble(router, 0x55, pirqmap[pirq-1], irq);
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return 1;
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}
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/*
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* ITE 8330G pirq rules are nibble-based
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* FIXME: pirqmap may be { 1, 0, 3, 2 },
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* 2+3 are both mapped to irq 9 on my system
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*/
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static int pirq_ite_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
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{
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static unsigned char pirqmap[4] = { 1, 0, 2, 3 };
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return read_config_nybble(router,0x43, pirqmap[pirq-1]);
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}
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static int pirq_ite_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
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{
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static unsigned char pirqmap[4] = { 1, 0, 2, 3 };
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write_config_nybble(router, 0x43, pirqmap[pirq-1], irq);
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return 1;
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}
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/*
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* OPTI: high four bits are nibble pointer..
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* I wonder what the low bits do?
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*/
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static int pirq_opti_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
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{
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return read_config_nybble(router, 0xb8, pirq >> 4);
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}
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static int pirq_opti_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
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{
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write_config_nybble(router, 0xb8, pirq >> 4, irq);
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return 1;
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}
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/*
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* Cyrix: nibble offset 0x5C
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* 0x5C bits 7:4 is INTB bits 3:0 is INTA
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* 0x5D bits 7:4 is INTD bits 3:0 is INTC
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*/
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static int pirq_cyrix_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
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{
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return read_config_nybble(router, 0x5C, (pirq-1)^1);
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}
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static int pirq_cyrix_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
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{
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write_config_nybble(router, 0x5C, (pirq-1)^1, irq);
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return 1;
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}
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/*
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* PIRQ routing for SiS 85C503 router used in several SiS chipsets.
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* We have to deal with the following issues here:
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* - vendors have different ideas about the meaning of link values
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* - some onboard devices (integrated in the chipset) have special
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* links and are thus routed differently (i.e. not via PCI INTA-INTD)
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* - different revision of the router have a different layout for
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* the routing registers, particularly for the onchip devices
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*
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* For all routing registers the common thing is we have one byte
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* per routeable link which is defined as:
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* bit 7 IRQ mapping enabled (0) or disabled (1)
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* bits [6:4] reserved (sometimes used for onchip devices)
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* bits [3:0] IRQ to map to
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* allowed: 3-7, 9-12, 14-15
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* reserved: 0, 1, 2, 8, 13
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*
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* The config-space registers located at 0x41/0x42/0x43/0x44 are
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* always used to route the normal PCI INT A/B/C/D respectively.
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* Apparently there are systems implementing PCI routing table using
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* link values 0x01-0x04 and others using 0x41-0x44 for PCI INTA..D.
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* We try our best to handle both link mappings.
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*
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* Currently (2003-05-21) it appears most SiS chipsets follow the
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* definition of routing registers from the SiS-5595 southbridge.
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* According to the SiS 5595 datasheets the revision id's of the
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* router (ISA-bridge) should be 0x01 or 0xb0.
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*
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* Furthermore we've also seen lspci dumps with revision 0x00 and 0xb1.
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* Looks like these are used in a number of SiS 5xx/6xx/7xx chipsets.
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* They seem to work with the current routing code. However there is
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* some concern because of the two USB-OHCI HCs (original SiS 5595
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* had only one). YMMV.
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*
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* Onchip routing for router rev-id 0x01/0xb0 and probably 0x00/0xb1:
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*
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* 0x61: IDEIRQ:
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* bits [6:5] must be written 01
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* bit 4 channel-select primary (0), secondary (1)
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*
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* 0x62: USBIRQ:
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* bit 6 OHCI function disabled (0), enabled (1)
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*
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* 0x6a: ACPI/SCI IRQ: bits 4-6 reserved
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*
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* 0x7e: Data Acq. Module IRQ - bits 4-6 reserved
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*
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* We support USBIRQ (in addition to INTA-INTD) and keep the
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* IDE, ACPI and DAQ routing untouched as set by the BIOS.
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*
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* Currently the only reported exception is the new SiS 65x chipset
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* which includes the SiS 69x southbridge. Here we have the 85C503
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* router revision 0x04 and there are changes in the register layout
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* mostly related to the different USB HCs with USB 2.0 support.
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*
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* Onchip routing for router rev-id 0x04 (try-and-error observation)
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*
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* 0x60/0x61/0x62/0x63: 1xEHCI and 3xOHCI (companion) USB-HCs
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* bit 6-4 are probably unused, not like 5595
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*/
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#define PIRQ_SIS_IRQ_MASK 0x0f
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#define PIRQ_SIS_IRQ_DISABLE 0x80
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#define PIRQ_SIS_USB_ENABLE 0x40
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static int pirq_sis_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
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{
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u8 x;
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int reg;
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reg = pirq;
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if (reg >= 0x01 && reg <= 0x04)
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reg += 0x40;
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pci_read_config_byte(router, reg, &x);
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return (x & PIRQ_SIS_IRQ_DISABLE) ? 0 : (x & PIRQ_SIS_IRQ_MASK);
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}
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static int pirq_sis_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
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{
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u8 x;
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int reg;
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reg = pirq;
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if (reg >= 0x01 && reg <= 0x04)
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reg += 0x40;
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pci_read_config_byte(router, reg, &x);
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x &= ~(PIRQ_SIS_IRQ_MASK | PIRQ_SIS_IRQ_DISABLE);
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x |= irq ? irq: PIRQ_SIS_IRQ_DISABLE;
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pci_write_config_byte(router, reg, x);
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return 1;
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}
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/*
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* VLSI: nibble offset 0x74 - educated guess due to routing table and
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* config space of VLSI 82C534 PCI-bridge/router (1004:0102)
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* Tested on HP OmniBook 800 covering PIRQ 1, 2, 4, 8 for onboard
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* devices, PIRQ 3 for non-pci(!) soundchip and (untested) PIRQ 6
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* for the busbridge to the docking station.
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*/
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static int pirq_vlsi_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
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{
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if (pirq > 8) {
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printk(KERN_INFO "VLSI router pirq escape (%d)\n", pirq);
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return 0;
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}
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return read_config_nybble(router, 0x74, pirq-1);
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}
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static int pirq_vlsi_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
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{
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if (pirq > 8) {
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printk(KERN_INFO "VLSI router pirq escape (%d)\n", pirq);
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return 0;
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}
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write_config_nybble(router, 0x74, pirq-1, irq);
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return 1;
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}
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/*
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* ServerWorks: PCI interrupts mapped to system IRQ lines through Index
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* and Redirect I/O registers (0x0c00 and 0x0c01). The Index register
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* format is (PCIIRQ## | 0x10), e.g.: PCIIRQ10=0x1a. The Redirect
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* register is a straight binary coding of desired PIC IRQ (low nibble).
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*
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* The 'link' value in the PIRQ table is already in the correct format
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* for the Index register. There are some special index values:
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* 0x00 for ACPI (SCI), 0x01 for USB, 0x02 for IDE0, 0x04 for IDE1,
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* and 0x03 for SMBus.
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*/
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static int pirq_serverworks_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
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{
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outb_p(pirq, 0xc00);
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return inb(0xc01) & 0xf;
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}
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static int pirq_serverworks_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
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{
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outb_p(pirq, 0xc00);
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outb_p(irq, 0xc01);
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return 1;
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}
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/* Support for AMD756 PCI IRQ Routing
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* Jhon H. Caicedo <jhcaiced@osso.org.co>
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* 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:
|
|
case PCI_DEVICE_ID_INTEL_ICH7_30:
|
|
case PCI_DEVICE_ID_INTEL_ICH7_31:
|
|
case PCI_DEVICE_ID_INTEL_ESB2_0:
|
|
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 */
|
|
|
|
if (router->device == PCI_DEVICE_ID_VIA_82C686 &&
|
|
device == PCI_DEVICE_ID_VIA_82C586_0) {
|
|
/* Asus k7m bios wrongly reports 82C686A as 586-compatible */
|
|
device = PCI_DEVICE_ID_VIA_82C686;
|
|
}
|
|
|
|
switch(device)
|
|
{
|
|
case PCI_DEVICE_ID_VIA_82C586_0:
|
|
r->name = "VIA";
|
|
r->get = pirq_via586_get;
|
|
r->set = pirq_via586_set;
|
|
return 1;
|
|
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, int active)
|
|
{
|
|
/*
|
|
* 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) {
|
|
if (active)
|
|
pirq_penalty[irq] += 1000;
|
|
else
|
|
pirq_penalty[irq] += 100;
|
|
}
|
|
}
|
|
|
|
void pcibios_penalize_isa_irq(int irq, int active)
|
|
{
|
|
#ifdef CONFIG_ACPI_PCI
|
|
if (!acpi_noirq)
|
|
acpi_penalize_isa_irq(irq, active);
|
|
else
|
|
#endif
|
|
pirq_penalize_isa_irq(irq, active);
|
|
}
|
|
|
|
static int pirq_enable_irq(struct pci_dev *dev)
|
|
{
|
|
u8 pin;
|
|
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);
|
|
}
|
|
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;
|
|
}
|