Merge branches 'release', 'asus', 'sony-laptop' and 'thinkpad' into release
[pandora-kernel.git] / arch / x86 / pci / numa.c
1 /*
2  * numa.c - Low-level PCI access for NUMA-Q machines
3  */
4
5 #include <linux/pci.h>
6 #include <linux/init.h>
7 #include <linux/nodemask.h>
8 #include <mach_apic.h>
9 #include "pci.h"
10
11 #define XQUAD_PORTIO_BASE 0xfe400000
12 #define XQUAD_PORTIO_QUAD 0x40000  /* 256k per quad. */
13
14 #define BUS2QUAD(global) (mp_bus_id_to_node[global])
15 #define BUS2LOCAL(global) (mp_bus_id_to_local[global])
16 #define QUADLOCAL2BUS(quad,local) (quad_local_to_mp_bus_id[quad][local])
17
18 extern void *xquad_portio;    /* Where the IO area was mapped */
19 #define XQUAD_PORT_ADDR(port, quad) (xquad_portio + (XQUAD_PORTIO_QUAD*quad) + port)
20
21 #define PCI_CONF1_MQ_ADDRESS(bus, devfn, reg) \
22         (0x80000000 | (BUS2LOCAL(bus) << 16) | (devfn << 8) | (reg & ~3))
23
24 static void write_cf8(unsigned bus, unsigned devfn, unsigned reg)
25 {
26         unsigned val = PCI_CONF1_MQ_ADDRESS(bus, devfn, reg);
27         if (xquad_portio)
28                 writel(val, XQUAD_PORT_ADDR(0xcf8, BUS2QUAD(bus)));
29         else
30                 outl(val, 0xCF8);
31 }
32
33 static int pci_conf1_mq_read(unsigned int seg, unsigned int bus,
34                              unsigned int devfn, int reg, int len, u32 *value)
35 {
36         unsigned long flags;
37         void *adr __iomem = XQUAD_PORT_ADDR(0xcfc, BUS2QUAD(bus));
38
39         if (!value || (bus >= MAX_MP_BUSSES) || (devfn > 255) || (reg > 255))
40                 return -EINVAL;
41
42         spin_lock_irqsave(&pci_config_lock, flags);
43
44         write_cf8(bus, devfn, reg);
45
46         switch (len) {
47         case 1:
48                 if (xquad_portio)
49                         *value = readb(adr + (reg & 3));
50                 else
51                         *value = inb(0xCFC + (reg & 3));
52                 break;
53         case 2:
54                 if (xquad_portio)
55                         *value = readw(adr + (reg & 2));
56                 else
57                         *value = inw(0xCFC + (reg & 2));
58                 break;
59         case 4:
60                 if (xquad_portio)
61                         *value = readl(adr);
62                 else
63                         *value = inl(0xCFC);
64                 break;
65         }
66
67         spin_unlock_irqrestore(&pci_config_lock, flags);
68
69         return 0;
70 }
71
72 static int pci_conf1_mq_write(unsigned int seg, unsigned int bus,
73                               unsigned int devfn, int reg, int len, u32 value)
74 {
75         unsigned long flags;
76         void *adr __iomem = XQUAD_PORT_ADDR(0xcfc, BUS2QUAD(bus));
77
78         if ((bus >= MAX_MP_BUSSES) || (devfn > 255) || (reg > 255)) 
79                 return -EINVAL;
80
81         spin_lock_irqsave(&pci_config_lock, flags);
82
83         write_cf8(bus, devfn, reg);
84
85         switch (len) {
86         case 1:
87                 if (xquad_portio)
88                         writeb(value, adr + (reg & 3));
89                 else
90                         outb((u8)value, 0xCFC + (reg & 3));
91                 break;
92         case 2:
93                 if (xquad_portio)
94                         writew(value, adr + (reg & 2));
95                 else
96                         outw((u16)value, 0xCFC + (reg & 2));
97                 break;
98         case 4:
99                 if (xquad_portio)
100                         writel(value, adr + reg);
101                 else
102                         outl((u32)value, 0xCFC);
103                 break;
104         }
105
106         spin_unlock_irqrestore(&pci_config_lock, flags);
107
108         return 0;
109 }
110
111 #undef PCI_CONF1_MQ_ADDRESS
112
113 static struct pci_raw_ops pci_direct_conf1_mq = {
114         .read   = pci_conf1_mq_read,
115         .write  = pci_conf1_mq_write
116 };
117
118
119 static void __devinit pci_fixup_i450nx(struct pci_dev *d)
120 {
121         /*
122          * i450NX -- Find and scan all secondary buses on all PXB's.
123          */
124         int pxb, reg;
125         u8 busno, suba, subb;
126         int quad = BUS2QUAD(d->bus->number);
127
128         printk("PCI: Searching for i450NX host bridges on %s\n", pci_name(d));
129         reg = 0xd0;
130         for(pxb=0; pxb<2; pxb++) {
131                 pci_read_config_byte(d, reg++, &busno);
132                 pci_read_config_byte(d, reg++, &suba);
133                 pci_read_config_byte(d, reg++, &subb);
134                 DBG("i450NX PXB %d: %02x/%02x/%02x\n", pxb, busno, suba, subb);
135                 if (busno) {
136                         /* Bus A */
137                         pci_scan_bus_with_sysdata(QUADLOCAL2BUS(quad, busno));
138                 }
139                 if (suba < subb) {
140                         /* Bus B */
141                         pci_scan_bus_with_sysdata(QUADLOCAL2BUS(quad, suba+1));
142                 }
143         }
144         pcibios_last_bus = -1;
145 }
146 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx);
147
148 static int __init pci_numa_init(void)
149 {
150         int quad;
151
152         raw_pci_ops = &pci_direct_conf1_mq;
153
154         if (pcibios_scanned++)
155                 return 0;
156
157         pci_root_bus = pcibios_scan_root(0);
158         if (pci_root_bus)
159                 pci_bus_add_devices(pci_root_bus);
160         if (num_online_nodes() > 1)
161                 for_each_online_node(quad) {
162                         if (quad == 0)
163                                 continue;
164                         printk("Scanning PCI bus %d for quad %d\n", 
165                                 QUADLOCAL2BUS(quad,0), quad);
166                         pci_scan_bus_with_sysdata(QUADLOCAL2BUS(quad, 0));
167                 }
168         return 0;
169 }
170
171 subsys_initcall(pci_numa_init);