2 * numa.c - Low-level PCI access for NUMA-Q machines
6 #include <linux/init.h>
7 #include <linux/nodemask.h>
11 #define XQUAD_PORTIO_BASE 0xfe400000
12 #define XQUAD_PORTIO_QUAD 0x40000 /* 256k per quad. */
14 int mp_bus_id_to_node[MAX_MP_BUSSES];
15 #define BUS2QUAD(global) (mp_bus_id_to_node[global])
17 int mp_bus_id_to_local[MAX_MP_BUSSES];
18 #define BUS2LOCAL(global) (mp_bus_id_to_local[global])
20 void mpc_oem_bus_info(struct mpc_config_bus *m, char *name,
21 struct mpc_config_translation *translation)
23 int quad = translation->trans_quad;
24 int local = translation->trans_local;
26 mp_bus_id_to_node[m->mpc_busid] = quad;
27 mp_bus_id_to_local[m->mpc_busid] = local;
28 printk(KERN_INFO "Bus #%d is %s (node %d)\n",
29 m->mpc_busid, name, quad);
32 int quad_local_to_mp_bus_id [NR_CPUS/4][4];
33 #define QUADLOCAL2BUS(quad,local) (quad_local_to_mp_bus_id[quad][local])
34 void mpc_oem_pci_bus(struct mpc_config_bus *m,
35 struct mpc_config_translation *translation)
37 int quad = translation->trans_quad;
38 int local = translation->trans_local;
40 quad_local_to_mp_bus_id[quad][local] = m->mpc_busid;
43 /* Where the IO area was mapped on multiquad, always 0 otherwise */
45 #ifdef CONFIG_X86_NUMAQ
46 EXPORT_SYMBOL(xquad_portio);
49 #define XQUAD_PORT_ADDR(port, quad) (xquad_portio + (XQUAD_PORTIO_QUAD*quad) + port)
51 #define PCI_CONF1_MQ_ADDRESS(bus, devfn, reg) \
52 (0x80000000 | (BUS2LOCAL(bus) << 16) | (devfn << 8) | (reg & ~3))
54 static void write_cf8(unsigned bus, unsigned devfn, unsigned reg)
56 unsigned val = PCI_CONF1_MQ_ADDRESS(bus, devfn, reg);
58 writel(val, XQUAD_PORT_ADDR(0xcf8, BUS2QUAD(bus)));
63 static int pci_conf1_mq_read(unsigned int seg, unsigned int bus,
64 unsigned int devfn, int reg, int len, u32 *value)
67 void *adr __iomem = XQUAD_PORT_ADDR(0xcfc, BUS2QUAD(bus));
69 if (!value || (bus >= MAX_MP_BUSSES) || (devfn > 255) || (reg > 255))
72 spin_lock_irqsave(&pci_config_lock, flags);
74 write_cf8(bus, devfn, reg);
79 *value = readb(adr + (reg & 3));
81 *value = inb(0xCFC + (reg & 3));
85 *value = readw(adr + (reg & 2));
87 *value = inw(0xCFC + (reg & 2));
97 spin_unlock_irqrestore(&pci_config_lock, flags);
102 static int pci_conf1_mq_write(unsigned int seg, unsigned int bus,
103 unsigned int devfn, int reg, int len, u32 value)
106 void *adr __iomem = XQUAD_PORT_ADDR(0xcfc, BUS2QUAD(bus));
108 if ((bus >= MAX_MP_BUSSES) || (devfn > 255) || (reg > 255))
111 spin_lock_irqsave(&pci_config_lock, flags);
113 write_cf8(bus, devfn, reg);
118 writeb(value, adr + (reg & 3));
120 outb((u8)value, 0xCFC + (reg & 3));
124 writew(value, adr + (reg & 2));
126 outw((u16)value, 0xCFC + (reg & 2));
130 writel(value, adr + reg);
132 outl((u32)value, 0xCFC);
136 spin_unlock_irqrestore(&pci_config_lock, flags);
141 #undef PCI_CONF1_MQ_ADDRESS
143 static struct pci_raw_ops pci_direct_conf1_mq = {
144 .read = pci_conf1_mq_read,
145 .write = pci_conf1_mq_write
149 static void __devinit pci_fixup_i450nx(struct pci_dev *d)
152 * i450NX -- Find and scan all secondary buses on all PXB's.
155 u8 busno, suba, subb;
156 int quad = BUS2QUAD(d->bus->number);
158 printk("PCI: Searching for i450NX host bridges on %s\n", pci_name(d));
160 for(pxb=0; pxb<2; pxb++) {
161 pci_read_config_byte(d, reg++, &busno);
162 pci_read_config_byte(d, reg++, &suba);
163 pci_read_config_byte(d, reg++, &subb);
164 DBG("i450NX PXB %d: %02x/%02x/%02x\n", pxb, busno, suba, subb);
167 pci_scan_bus_with_sysdata(QUADLOCAL2BUS(quad, busno));
171 pci_scan_bus_with_sysdata(QUADLOCAL2BUS(quad, suba+1));
174 pcibios_last_bus = -1;
176 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx);
178 static int __init pci_numa_init(void)
182 raw_pci_ops = &pci_direct_conf1_mq;
184 if (pcibios_scanned++)
187 pci_root_bus = pcibios_scan_root(0);
189 pci_bus_add_devices(pci_root_bus);
190 if (num_online_nodes() > 1)
191 for_each_online_node(quad) {
194 printk("Scanning PCI bus %d for quad %d\n",
195 QUADLOCAL2BUS(quad,0), quad);
196 pci_scan_bus_with_sysdata(QUADLOCAL2BUS(quad, 0));
201 subsys_initcall(pci_numa_init);