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 <asm/apic.h>
9 #include <asm/mpspec.h>
10 #include <asm/pci_x86.h>
11 #include <asm/numaq.h>
12
13 #define BUS2QUAD(global) (mp_bus_id_to_node[global])
14
15 #define BUS2LOCAL(global) (mp_bus_id_to_local[global])
16
17 #define QUADLOCAL2BUS(quad,local) (quad_local_to_mp_bus_id[quad][local])
18
19 #define PCI_CONF1_MQ_ADDRESS(bus, devfn, reg) \
20 (0x80000000 | (BUS2LOCAL(bus) << 16) | (devfn << 8) | (reg & ~3))
21
write_cf8(unsigned bus,unsigned devfn,unsigned reg)22 static void write_cf8(unsigned bus, unsigned devfn, unsigned reg)
23 {
24 unsigned val = PCI_CONF1_MQ_ADDRESS(bus, devfn, reg);
25 if (xquad_portio)
26 writel(val, XQUAD_PORT_ADDR(0xcf8, BUS2QUAD(bus)));
27 else
28 outl(val, 0xCF8);
29 }
30
pci_conf1_mq_read(unsigned int seg,unsigned int bus,unsigned int devfn,int reg,int len,u32 * value)31 static int pci_conf1_mq_read(unsigned int seg, unsigned int bus,
32 unsigned int devfn, int reg, int len, u32 *value)
33 {
34 unsigned long flags;
35 void *adr __iomem = XQUAD_PORT_ADDR(0xcfc, BUS2QUAD(bus));
36
37 WARN_ON(seg);
38 if (!value || (bus >= MAX_MP_BUSSES) || (devfn > 255) || (reg > 255))
39 return -EINVAL;
40
41 raw_spin_lock_irqsave(&pci_config_lock, flags);
42
43 write_cf8(bus, devfn, reg);
44
45 switch (len) {
46 case 1:
47 if (xquad_portio)
48 *value = readb(adr + (reg & 3));
49 else
50 *value = inb(0xCFC + (reg & 3));
51 break;
52 case 2:
53 if (xquad_portio)
54 *value = readw(adr + (reg & 2));
55 else
56 *value = inw(0xCFC + (reg & 2));
57 break;
58 case 4:
59 if (xquad_portio)
60 *value = readl(adr);
61 else
62 *value = inl(0xCFC);
63 break;
64 }
65
66 raw_spin_unlock_irqrestore(&pci_config_lock, flags);
67
68 return 0;
69 }
70
pci_conf1_mq_write(unsigned int seg,unsigned int bus,unsigned int devfn,int reg,int len,u32 value)71 static int pci_conf1_mq_write(unsigned int seg, unsigned int bus,
72 unsigned int devfn, int reg, int len, u32 value)
73 {
74 unsigned long flags;
75 void *adr __iomem = XQUAD_PORT_ADDR(0xcfc, BUS2QUAD(bus));
76
77 WARN_ON(seg);
78 if ((bus >= MAX_MP_BUSSES) || (devfn > 255) || (reg > 255))
79 return -EINVAL;
80
81 raw_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 raw_spin_unlock_irqrestore(&pci_config_lock, flags);
107
108 return 0;
109 }
110
111 #undef PCI_CONF1_MQ_ADDRESS
112
113 static const struct pci_raw_ops pci_direct_conf1_mq = {
114 .read = pci_conf1_mq_read,
115 .write = pci_conf1_mq_write
116 };
117
118
pci_fixup_i450nx(struct pci_dev * d)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 dev_info(&d->dev, "searching for i450NX host bridges\n");
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 dev_dbg(&d->dev, "i450NX PXB %d: %02x/%02x/%02x\n",
135 pxb, busno, suba, subb);
136 if (busno) {
137 /* Bus A */
138 pci_scan_bus_with_sysdata(QUADLOCAL2BUS(quad, busno));
139 }
140 if (suba < subb) {
141 /* Bus B */
142 pci_scan_bus_with_sysdata(QUADLOCAL2BUS(quad, suba+1));
143 }
144 }
145 pcibios_last_bus = -1;
146 }
147 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx);
148
pci_numaq_init(void)149 int __init pci_numaq_init(void)
150 {
151 int quad;
152
153 raw_pci_ops = &pci_direct_conf1_mq;
154
155 pci_root_bus = pcibios_scan_root(0);
156 if (num_online_nodes() > 1)
157 for_each_online_node(quad) {
158 if (quad == 0)
159 continue;
160 printk("Scanning PCI bus %d for quad %d\n",
161 QUADLOCAL2BUS(quad,0), quad);
162 pci_scan_bus_with_sysdata(QUADLOCAL2BUS(quad, 0));
163 }
164 return 0;
165 }
166