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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 436 | giacomo | 1 | /* |
| 2 | * numa.c - Low-level PCI access for NUMA-Q machines |
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| 3 | */ |
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| 4 | |||
| 5 | #include <linux/pci.h> |
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| 6 | #include <linux/init.h> |
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| 7 | #include "pci.h" |
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| 8 | |||
| 9 | #define BUS2QUAD(global) (mp_bus_id_to_node[global]) |
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| 10 | #define BUS2LOCAL(global) (mp_bus_id_to_local[global]) |
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| 11 | #define QUADLOCAL2BUS(quad,local) (quad_local_to_mp_bus_id[quad][local]) |
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| 12 | |||
| 13 | #define PCI_CONF1_MQ_ADDRESS(bus, devfn, reg) \ |
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| 14 | (0x80000000 | (BUS2LOCAL(bus) << 16) | (devfn << 8) | (reg & ~3)) |
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| 15 | |||
| 16 | static int pci_conf1_mq_read (int seg, int bus, int devfn, int reg, int len, u32 *value) |
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| 17 | { |
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| 18 | unsigned long flags; |
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| 19 | |||
| 20 | if (!value || (bus > MAX_MP_BUSSES) || (devfn > 255) || (reg > 255)) |
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| 21 | return -EINVAL; |
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| 22 | |||
| 23 | spin_lock_irqsave(&pci_config_lock, flags); |
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| 24 | |||
| 25 | outl_quad(PCI_CONF1_MQ_ADDRESS(bus, devfn, reg), 0xCF8, BUS2QUAD(bus)); |
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| 26 | |||
| 27 | switch (len) { |
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| 28 | case 1: |
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| 29 | *value = inb_quad(0xCFC + (reg & 3), BUS2QUAD(bus)); |
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| 30 | break; |
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| 31 | case 2: |
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| 32 | *value = inw_quad(0xCFC + (reg & 2), BUS2QUAD(bus)); |
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| 33 | break; |
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| 34 | case 4: |
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| 35 | *value = inl_quad(0xCFC, BUS2QUAD(bus)); |
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| 36 | break; |
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| 37 | } |
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| 38 | |||
| 39 | spin_unlock_irqrestore(&pci_config_lock, flags); |
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| 40 | |||
| 41 | return 0; |
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| 42 | } |
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| 43 | |||
| 44 | static int pci_conf1_mq_write (int seg, int bus, int devfn, int reg, int len, u32 value) |
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| 45 | { |
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| 46 | unsigned long flags; |
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| 47 | |||
| 48 | if ((bus > MAX_MP_BUSSES) || (devfn > 255) || (reg > 255)) |
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| 49 | return -EINVAL; |
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| 50 | |||
| 51 | spin_lock_irqsave(&pci_config_lock, flags); |
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| 52 | |||
| 53 | outl_quad(PCI_CONF1_MQ_ADDRESS(bus, devfn, reg), 0xCF8, BUS2QUAD(bus)); |
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| 54 | |||
| 55 | switch (len) { |
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| 56 | case 1: |
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| 57 | outb_quad((u8)value, 0xCFC + (reg & 3), BUS2QUAD(bus)); |
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| 58 | break; |
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| 59 | case 2: |
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| 60 | outw_quad((u16)value, 0xCFC + (reg & 2), BUS2QUAD(bus)); |
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| 61 | break; |
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| 62 | case 4: |
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| 63 | outl_quad((u32)value, 0xCFC, BUS2QUAD(bus)); |
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| 64 | break; |
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| 65 | } |
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| 66 | |||
| 67 | spin_unlock_irqrestore(&pci_config_lock, flags); |
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| 68 | |||
| 69 | return 0; |
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| 70 | } |
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| 71 | |||
| 72 | #undef PCI_CONF1_MQ_ADDRESS |
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| 73 | |||
| 74 | static struct pci_raw_ops pci_direct_conf1_mq = { |
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| 75 | .read = pci_conf1_mq_read, |
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| 76 | .write = pci_conf1_mq_write |
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| 77 | }; |
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| 78 | |||
| 79 | |||
| 80 | static void __devinit pci_fixup_i450nx(struct pci_dev *d) |
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| 81 | { |
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| 82 | /* |
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| 83 | * i450NX -- Find and scan all secondary buses on all PXB's. |
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| 84 | */ |
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| 85 | int pxb, reg; |
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| 86 | u8 busno, suba, subb; |
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| 87 | int quad = BUS2QUAD(d->bus->number); |
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| 88 | |||
| 89 | printk("PCI: Searching for i450NX host bridges on %s\n", pci_name(d)); |
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| 90 | reg = 0xd0; |
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| 91 | for(pxb=0; pxb<2; pxb++) { |
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| 92 | pci_read_config_byte(d, reg++, &busno); |
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| 93 | pci_read_config_byte(d, reg++, &suba); |
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| 94 | pci_read_config_byte(d, reg++, &subb); |
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| 95 | DBG("i450NX PXB %d: %02x/%02x/%02x\n", pxb, busno, suba, subb); |
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| 96 | if (busno) |
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| 97 | pci_scan_bus(QUADLOCAL2BUS(quad,busno), &pci_root_ops, NULL); /* Bus A */ |
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| 98 | if (suba < subb) |
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| 99 | pci_scan_bus(QUADLOCAL2BUS(quad,suba+1), &pci_root_ops, NULL); /* Bus B */ |
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| 100 | } |
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| 101 | pcibios_last_bus = -1; |
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| 102 | } |
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| 103 | |||
| 104 | struct pci_fixup pcibios_fixups[] = { |
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| 105 | { PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx }, |
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| 106 | }; |
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| 107 | |||
| 108 | static int __init pci_numa_init(void) |
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| 109 | { |
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| 110 | int quad; |
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| 111 | |||
| 112 | raw_pci_ops = &pci_direct_conf1_mq; |
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| 113 | |||
| 114 | if (pcibios_scanned++) |
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| 115 | return 0; |
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| 116 | |||
| 117 | pci_root_bus = pcibios_scan_root(0); |
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| 118 | if (numnodes > 1) { |
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| 119 | for (quad = 1; quad < numnodes; ++quad) { |
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| 120 | printk("Scanning PCI bus %d for quad %d\n", |
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| 121 | QUADLOCAL2BUS(quad,0), quad); |
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| 122 | pci_scan_bus(QUADLOCAL2BUS(quad,0), |
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| 123 | &pci_root_ops, NULL); |
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| 124 | } |
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| 125 | } |
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| 126 | return 0; |
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| 127 | } |
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| 128 | |||
| 129 | subsys_initcall(pci_numa_init); |