Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[linux-2.6] / arch / x86 / pci / numaq_32.c
1 /*
2  * numaq_32.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 <asm/mpspec.h>
10 #include <asm/pci_x86.h>
11
12 #define XQUAD_PORTIO_BASE 0xfe400000
13 #define XQUAD_PORTIO_QUAD 0x40000  /* 256k per quad. */
14
15 #define BUS2QUAD(global) (mp_bus_id_to_node[global])
16
17 #define BUS2LOCAL(global) (mp_bus_id_to_local[global])
18
19 #define QUADLOCAL2BUS(quad,local) (quad_local_to_mp_bus_id[quad][local])
20
21 /* Where the IO area was mapped on multiquad, always 0 otherwise */
22 void *xquad_portio;
23 EXPORT_SYMBOL(xquad_portio);
24
25 #define XQUAD_PORT_ADDR(port, quad) (xquad_portio + (XQUAD_PORTIO_QUAD*quad) + port)
26
27 #define PCI_CONF1_MQ_ADDRESS(bus, devfn, reg) \
28         (0x80000000 | (BUS2LOCAL(bus) << 16) | (devfn << 8) | (reg & ~3))
29
30 static void write_cf8(unsigned bus, unsigned devfn, unsigned reg)
31 {
32         unsigned val = PCI_CONF1_MQ_ADDRESS(bus, devfn, reg);
33         if (xquad_portio)
34                 writel(val, XQUAD_PORT_ADDR(0xcf8, BUS2QUAD(bus)));
35         else
36                 outl(val, 0xCF8);
37 }
38
39 static int pci_conf1_mq_read(unsigned int seg, unsigned int bus,
40                              unsigned int devfn, int reg, int len, u32 *value)
41 {
42         unsigned long flags;
43         void *adr __iomem = XQUAD_PORT_ADDR(0xcfc, BUS2QUAD(bus));
44
45         if (!value || (bus >= MAX_MP_BUSSES) || (devfn > 255) || (reg > 255))
46                 return -EINVAL;
47
48         spin_lock_irqsave(&pci_config_lock, flags);
49
50         write_cf8(bus, devfn, reg);
51
52         switch (len) {
53         case 1:
54                 if (xquad_portio)
55                         *value = readb(adr + (reg & 3));
56                 else
57                         *value = inb(0xCFC + (reg & 3));
58                 break;
59         case 2:
60                 if (xquad_portio)
61                         *value = readw(adr + (reg & 2));
62                 else
63                         *value = inw(0xCFC + (reg & 2));
64                 break;
65         case 4:
66                 if (xquad_portio)
67                         *value = readl(adr);
68                 else
69                         *value = inl(0xCFC);
70                 break;
71         }
72
73         spin_unlock_irqrestore(&pci_config_lock, flags);
74
75         return 0;
76 }
77
78 static int pci_conf1_mq_write(unsigned int seg, unsigned int bus,
79                               unsigned int devfn, int reg, int len, u32 value)
80 {
81         unsigned long flags;
82         void *adr __iomem = XQUAD_PORT_ADDR(0xcfc, BUS2QUAD(bus));
83
84         if ((bus >= MAX_MP_BUSSES) || (devfn > 255) || (reg > 255)) 
85                 return -EINVAL;
86
87         spin_lock_irqsave(&pci_config_lock, flags);
88
89         write_cf8(bus, devfn, reg);
90
91         switch (len) {
92         case 1:
93                 if (xquad_portio)
94                         writeb(value, adr + (reg & 3));
95                 else
96                         outb((u8)value, 0xCFC + (reg & 3));
97                 break;
98         case 2:
99                 if (xquad_portio)
100                         writew(value, adr + (reg & 2));
101                 else
102                         outw((u16)value, 0xCFC + (reg & 2));
103                 break;
104         case 4:
105                 if (xquad_portio)
106                         writel(value, adr + reg);
107                 else
108                         outl((u32)value, 0xCFC);
109                 break;
110         }
111
112         spin_unlock_irqrestore(&pci_config_lock, flags);
113
114         return 0;
115 }
116
117 #undef PCI_CONF1_MQ_ADDRESS
118
119 static struct pci_raw_ops pci_direct_conf1_mq = {
120         .read   = pci_conf1_mq_read,
121         .write  = pci_conf1_mq_write
122 };
123
124
125 static void __devinit pci_fixup_i450nx(struct pci_dev *d)
126 {
127         /*
128          * i450NX -- Find and scan all secondary buses on all PXB's.
129          */
130         int pxb, reg;
131         u8 busno, suba, subb;
132         int quad = BUS2QUAD(d->bus->number);
133
134         dev_info(&d->dev, "searching for i450NX host bridges\n");
135         reg = 0xd0;
136         for(pxb=0; pxb<2; pxb++) {
137                 pci_read_config_byte(d, reg++, &busno);
138                 pci_read_config_byte(d, reg++, &suba);
139                 pci_read_config_byte(d, reg++, &subb);
140                 dev_dbg(&d->dev, "i450NX PXB %d: %02x/%02x/%02x\n",
141                         pxb, busno, suba, subb);
142                 if (busno) {
143                         /* Bus A */
144                         pci_scan_bus_with_sysdata(QUADLOCAL2BUS(quad, busno));
145                 }
146                 if (suba < subb) {
147                         /* Bus B */
148                         pci_scan_bus_with_sysdata(QUADLOCAL2BUS(quad, suba+1));
149                 }
150         }
151         pcibios_last_bus = -1;
152 }
153 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx);
154
155 int __init pci_numaq_init(void)
156 {
157         int quad;
158
159         if (!found_numaq)
160                 return 0;
161
162         raw_pci_ops = &pci_direct_conf1_mq;
163
164         if (pcibios_scanned++)
165                 return 0;
166
167         pci_root_bus = pcibios_scan_root(0);
168         if (pci_root_bus)
169                 pci_bus_add_devices(pci_root_bus);
170         if (num_online_nodes() > 1)
171                 for_each_online_node(quad) {
172                         if (quad == 0)
173                                 continue;
174                         printk("Scanning PCI bus %d for quad %d\n", 
175                                 QUADLOCAL2BUS(quad,0), quad);
176                         pci_scan_bus_with_sysdata(QUADLOCAL2BUS(quad, 0));
177                 }
178         return 0;
179 }