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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Robert Richtere27cf3a2008-07-11 12:18:41 +02002 * numaq_32.c - Low-level PCI access for NUMA-Q machines
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 */
4
5#include <linux/pci.h>
6#include <linux/init.h>
7#include <linux/nodemask.h>
Andi Kleenc7e844f2008-02-04 16:48:03 +01008#include <mach_apic.h>
Yinghai Lud49c4282008-06-08 18:31:54 -07009#include <asm/mpspec.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include "pci.h"
11
Andi Kleenc7e844f2008-02-04 16:48:03 +010012#define XQUAD_PORTIO_BASE 0xfe400000
13#define XQUAD_PORTIO_QUAD 0x40000 /* 256k per quad. */
14
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#define BUS2QUAD(global) (mp_bus_id_to_node[global])
Alexey Starikovskiye129cb42008-03-11 22:55:42 +030016
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#define BUS2LOCAL(global) (mp_bus_id_to_local[global])
Alexey Starikovskiy6079d2d2008-03-11 19:45:48 +030018
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#define QUADLOCAL2BUS(quad,local) (quad_local_to_mp_bus_id[quad][local])
20
Glauber de Oliveira Costa4cedb332008-03-19 14:26:14 -030021/* Where the IO area was mapped on multiquad, always 0 otherwise */
22void *xquad_portio;
Glauber de Oliveira Costa4cedb332008-03-19 14:26:14 -030023EXPORT_SYMBOL(xquad_portio);
Glauber de Oliveira Costa4cedb332008-03-19 14:26:14 -030024
Andi Kleenc7e844f2008-02-04 16:48:03 +010025#define XQUAD_PORT_ADDR(port, quad) (xquad_portio + (XQUAD_PORTIO_QUAD*quad) + port)
26
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#define PCI_CONF1_MQ_ADDRESS(bus, devfn, reg) \
28 (0x80000000 | (BUS2LOCAL(bus) << 16) | (devfn << 8) | (reg & ~3))
29
Andi Kleenc7e844f2008-02-04 16:48:03 +010030static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070039static 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;
Andi Kleenc7e844f2008-02-04 16:48:03 +010043 void *adr __iomem = XQUAD_PORT_ADDR(0xcfc, BUS2QUAD(bus));
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45 if (!value || (bus >= MAX_MP_BUSSES) || (devfn > 255) || (reg > 255))
46 return -EINVAL;
47
48 spin_lock_irqsave(&pci_config_lock, flags);
49
Andi Kleenc7e844f2008-02-04 16:48:03 +010050 write_cf8(bus, devfn, reg);
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
52 switch (len) {
53 case 1:
Andi Kleenc7e844f2008-02-04 16:48:03 +010054 if (xquad_portio)
55 *value = readb(adr + (reg & 3));
56 else
57 *value = inb(0xCFC + (reg & 3));
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 break;
59 case 2:
Andi Kleenc7e844f2008-02-04 16:48:03 +010060 if (xquad_portio)
61 *value = readw(adr + (reg & 2));
62 else
63 *value = inw(0xCFC + (reg & 2));
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 break;
65 case 4:
Andi Kleenc7e844f2008-02-04 16:48:03 +010066 if (xquad_portio)
67 *value = readl(adr);
68 else
69 *value = inl(0xCFC);
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 break;
71 }
72
73 spin_unlock_irqrestore(&pci_config_lock, flags);
74
75 return 0;
76}
77
78static 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;
Andi Kleenc7e844f2008-02-04 16:48:03 +010082 void *adr __iomem = XQUAD_PORT_ADDR(0xcfc, BUS2QUAD(bus));
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
84 if ((bus >= MAX_MP_BUSSES) || (devfn > 255) || (reg > 255))
85 return -EINVAL;
86
87 spin_lock_irqsave(&pci_config_lock, flags);
88
Andi Kleenc7e844f2008-02-04 16:48:03 +010089 write_cf8(bus, devfn, reg);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
91 switch (len) {
92 case 1:
Andi Kleenc7e844f2008-02-04 16:48:03 +010093 if (xquad_portio)
94 writeb(value, adr + (reg & 3));
95 else
96 outb((u8)value, 0xCFC + (reg & 3));
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 break;
98 case 2:
Andi Kleenc7e844f2008-02-04 16:48:03 +010099 if (xquad_portio)
100 writew(value, adr + (reg & 2));
101 else
102 outw((u16)value, 0xCFC + (reg & 2));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 break;
104 case 4:
Andi Kleenc7e844f2008-02-04 16:48:03 +0100105 if (xquad_portio)
106 writel(value, adr + reg);
107 else
108 outl((u32)value, 0xCFC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 break;
110 }
111
112 spin_unlock_irqrestore(&pci_config_lock, flags);
113
114 return 0;
115}
116
117#undef PCI_CONF1_MQ_ADDRESS
118
119static struct pci_raw_ops pci_direct_conf1_mq = {
120 .read = pci_conf1_mq_read,
121 .write = pci_conf1_mq_write
122};
123
124
125static 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
Bjorn Helgaas12c0b202008-07-23 17:00:13 -0600134 dev_info(&d->dev, "searching for i450NX host bridges\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 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);
Bjorn Helgaas12c0b202008-07-23 17:00:13 -0600140 dev_dbg(&d->dev, "i450NX PXB %d: %02x/%02x/%02x\n",
141 pxb, busno, suba, subb);
Muli Ben-Yehuda73c59af2007-08-10 13:01:19 -0700142 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 }
151 pcibios_last_bus = -1;
152}
153DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx);
154
Robert Richtere27cf3a2008-07-11 12:18:41 +0200155int __init pci_numaq_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156{
157 int quad;
158
Yinghai Lud49c4282008-06-08 18:31:54 -0700159 if (!found_numaq)
160 return 0;
161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 raw_pci_ops = &pci_direct_conf1_mq;
163
164 if (pcibios_scanned++)
165 return 0;
166
167 pci_root_bus = pcibios_scan_root(0);
Rajesh Shahc431ada2005-04-28 00:25:45 -0700168 if (pci_root_bus)
169 pci_bus_add_devices(pci_root_bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 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);
Muli Ben-Yehuda73c59af2007-08-10 13:01:19 -0700176 pci_scan_bus_with_sysdata(QUADLOCAL2BUS(quad, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 }
178 return 0;
179}