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x86/PCI: initialize PCI bus node numbers early
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CommitLineData
1da177e4
LT
1/*
2 * Low-Level PCI Support for PC
3 *
4 * (c) 1999--2000 Martin Mares <mj@ucw.cz>
5 */
6
7#include <linux/sched.h>
8#include <linux/pci.h>
9#include <linux/ioport.h>
10#include <linux/init.h>
8c4b2cf9 11#include <linux/dmi.h>
1da177e4
LT
12
13#include <asm/acpi.h>
14#include <asm/segment.h>
15#include <asm/io.h>
16#include <asm/smp.h>
82487711 17#include <asm/pci_x86.h>
1da177e4 18
1da177e4
LT
19unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 |
20 PCI_PROBE_MMCONF;
21
e3f2baeb 22unsigned int pci_early_dump_regs;
2b290da0 23static int pci_bf_sort;
1da177e4 24int pci_routeirq;
a9322f64 25int noioapicquirk;
41b9eb26
SA
26#ifdef CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS
27int noioapicreroute = 0;
28#else
9197979b 29int noioapicreroute = 1;
41b9eb26 30#endif
1da177e4 31int pcibios_last_bus = -1;
120bb424 32unsigned long pirq_table_addr;
33struct pci_bus *pci_root_bus;
1da177e4 34struct pci_raw_ops *raw_pci_ops;
b6ce068a
MW
35struct pci_raw_ops *raw_pci_ext_ops;
36
37int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
38 int reg, int len, u32 *val)
39{
beef3129 40 if (domain == 0 && reg < 256 && raw_pci_ops)
b6ce068a
MW
41 return raw_pci_ops->read(domain, bus, devfn, reg, len, val);
42 if (raw_pci_ext_ops)
43 return raw_pci_ext_ops->read(domain, bus, devfn, reg, len, val);
44 return -EINVAL;
45}
46
47int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
48 int reg, int len, u32 val)
49{
beef3129 50 if (domain == 0 && reg < 256 && raw_pci_ops)
b6ce068a
MW
51 return raw_pci_ops->write(domain, bus, devfn, reg, len, val);
52 if (raw_pci_ext_ops)
53 return raw_pci_ext_ops->write(domain, bus, devfn, reg, len, val);
54 return -EINVAL;
55}
1da177e4
LT
56
57static int pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value)
58{
b6ce068a 59 return raw_pci_read(pci_domain_nr(bus), bus->number,
a79e4198 60 devfn, where, size, value);
1da177e4
LT
61}
62
63static int pci_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value)
64{
b6ce068a 65 return raw_pci_write(pci_domain_nr(bus), bus->number,
a79e4198 66 devfn, where, size, value);
1da177e4
LT
67}
68
69struct pci_ops pci_root_ops = {
70 .read = pci_read,
71 .write = pci_write,
72};
73
74/*
75 * legacy, numa, and acpi all want to call pcibios_scan_root
76 * from their initcalls. This flag prevents that.
77 */
78int pcibios_scanned;
79
80/*
81 * This interrupt-safe spinlock protects all accesses to PCI
82 * configuration space.
83 */
84DEFINE_SPINLOCK(pci_config_lock);
85
13a6ddb0
YL
86static int __devinit can_skip_ioresource_align(const struct dmi_system_id *d)
87{
88 pci_probe |= PCI_CAN_SKIP_ISA_ALIGN;
89 printk(KERN_INFO "PCI: %s detected, can skip ISA alignment\n", d->ident);
90 return 0;
91}
92
821508d4 93static const struct dmi_system_id can_skip_pciprobe_dmi_table[] __devinitconst = {
13a6ddb0
YL
94/*
95 * Systems where PCI IO resource ISA alignment can be skipped
96 * when the ISA enable bit in the bridge control is not set
97 */
98 {
99 .callback = can_skip_ioresource_align,
100 .ident = "IBM System x3800",
101 .matches = {
102 DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
103 DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
104 },
105 },
106 {
107 .callback = can_skip_ioresource_align,
108 .ident = "IBM System x3850",
109 .matches = {
110 DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
111 DMI_MATCH(DMI_PRODUCT_NAME, "x3850"),
112 },
113 },
114 {
115 .callback = can_skip_ioresource_align,
116 .ident = "IBM System x3950",
117 .matches = {
118 DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
119 DMI_MATCH(DMI_PRODUCT_NAME, "x3950"),
120 },
121 },
122 {}
123};
124
125void __init dmi_check_skip_isa_align(void)
126{
127 dmi_check_system(can_skip_pciprobe_dmi_table);
128}
129
bb71ad88
GH
130static void __devinit pcibios_fixup_device_resources(struct pci_dev *dev)
131{
132 struct resource *rom_r = &dev->resource[PCI_ROM_RESOURCE];
133
134 if (pci_probe & PCI_NOASSIGN_ROMS) {
135 if (rom_r->parent)
136 return;
137 if (rom_r->start) {
138 /* we deal with BIOS assigned ROM later */
139 return;
140 }
141 rom_r->start = rom_r->end = rom_r->flags = 0;
142 }
143}
144
1da177e4
LT
145/*
146 * Called after each bus is probed, but before its children
147 * are examined.
148 */
149
0bb1be3e 150void __devinit pcibios_fixup_bus(struct pci_bus *b)
1da177e4 151{
bb71ad88
GH
152 struct pci_dev *dev;
153
0e94ecd0
YL
154 /* root bus? */
155 if (!b->parent)
156 x86_pci_root_bus_res_quirks(b);
1da177e4 157 pci_read_bridge_bases(b);
bb71ad88
GH
158 list_for_each_entry(dev, &b->devices, bus_list)
159 pcibios_fixup_device_resources(dev);
1da177e4
LT
160}
161
6b4b78fe
MD
162/*
163 * Only use DMI information to set this if nothing was passed
164 * on the kernel command line (which was parsed earlier).
165 */
166
1855256c 167static int __devinit set_bf_sort(const struct dmi_system_id *d)
6b4b78fe
MD
168{
169 if (pci_bf_sort == pci_bf_sort_default) {
170 pci_bf_sort = pci_dmi_bf;
171 printk(KERN_INFO "PCI: %s detected, enabling pci=bfsort.\n", d->ident);
172 }
173 return 0;
174}
175
8c4b2cf9
BK
176/*
177 * Enable renumbering of PCI bus# ranges to reach all PCI busses (Cardbus)
178 */
179#ifdef __i386__
1855256c 180static int __devinit assign_all_busses(const struct dmi_system_id *d)
8c4b2cf9
BK
181{
182 pci_probe |= PCI_ASSIGN_ALL_BUSSES;
183 printk(KERN_INFO "%s detected: enabling PCI bus# renumbering"
184 " (pci=assign-busses)\n", d->ident);
185 return 0;
186}
187#endif
188
821508d4 189static const struct dmi_system_id __devinitconst pciprobe_dmi_table[] = {
6b4b78fe 190#ifdef __i386__
8c4b2cf9
BK
191/*
192 * Laptops which need pci=assign-busses to see Cardbus cards
193 */
8c4b2cf9
BK
194 {
195 .callback = assign_all_busses,
196 .ident = "Samsung X20 Laptop",
197 .matches = {
198 DMI_MATCH(DMI_SYS_VENDOR, "Samsung Electronics"),
199 DMI_MATCH(DMI_PRODUCT_NAME, "SX20S"),
200 },
201 },
202#endif /* __i386__ */
6b4b78fe
MD
203 {
204 .callback = set_bf_sort,
205 .ident = "Dell PowerEdge 1950",
206 .matches = {
207 DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
208 DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1950"),
209 },
210 },
211 {
212 .callback = set_bf_sort,
213 .ident = "Dell PowerEdge 1955",
214 .matches = {
215 DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
216 DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1955"),
217 },
218 },
219 {
220 .callback = set_bf_sort,
221 .ident = "Dell PowerEdge 2900",
222 .matches = {
223 DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
224 DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2900"),
225 },
226 },
227 {
228 .callback = set_bf_sort,
229 .ident = "Dell PowerEdge 2950",
230 .matches = {
231 DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
232 DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2950"),
233 },
234 },
f7a9dae7
MD
235 {
236 .callback = set_bf_sort,
237 .ident = "Dell PowerEdge R900",
238 .matches = {
239 DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
240 DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge R900"),
241 },
242 },
f52383d3
AG
243 {
244 .callback = set_bf_sort,
245 .ident = "HP ProLiant BL20p G3",
246 .matches = {
247 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
248 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G3"),
249 },
250 },
251 {
252 .callback = set_bf_sort,
253 .ident = "HP ProLiant BL20p G4",
254 .matches = {
255 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
256 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G4"),
257 },
258 },
259 {
260 .callback = set_bf_sort,
261 .ident = "HP ProLiant BL30p G1",
262 .matches = {
263 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
264 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL30p G1"),
265 },
266 },
267 {
268 .callback = set_bf_sort,
269 .ident = "HP ProLiant BL25p G1",
270 .matches = {
271 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
272 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL25p G1"),
273 },
274 },
275 {
276 .callback = set_bf_sort,
277 .ident = "HP ProLiant BL35p G1",
278 .matches = {
279 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
280 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL35p G1"),
281 },
282 },
283 {
284 .callback = set_bf_sort,
285 .ident = "HP ProLiant BL45p G1",
286 .matches = {
287 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
288 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G1"),
289 },
290 },
291 {
292 .callback = set_bf_sort,
293 .ident = "HP ProLiant BL45p G2",
294 .matches = {
295 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
296 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G2"),
297 },
298 },
299 {
300 .callback = set_bf_sort,
301 .ident = "HP ProLiant BL460c G1",
302 .matches = {
303 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
304 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL460c G1"),
305 },
306 },
307 {
308 .callback = set_bf_sort,
309 .ident = "HP ProLiant BL465c G1",
310 .matches = {
311 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
312 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL465c G1"),
313 },
314 },
315 {
316 .callback = set_bf_sort,
317 .ident = "HP ProLiant BL480c G1",
318 .matches = {
319 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
320 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL480c G1"),
321 },
322 },
323 {
324 .callback = set_bf_sort,
325 .ident = "HP ProLiant BL685c G1",
326 .matches = {
327 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
328 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL685c G1"),
329 },
330 },
8f8ae1a7
MS
331 {
332 .callback = set_bf_sort,
8d64c781 333 .ident = "HP ProLiant DL360",
8f8ae1a7
MS
334 .matches = {
335 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
8d64c781 336 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL360"),
8f8ae1a7
MS
337 },
338 },
339 {
340 .callback = set_bf_sort,
8d64c781 341 .ident = "HP ProLiant DL380",
8f8ae1a7
MS
342 .matches = {
343 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
8d64c781 344 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL380"),
8f8ae1a7
MS
345 },
346 },
5b1ea82f
JL
347#ifdef __i386__
348 {
349 .callback = assign_all_busses,
350 .ident = "Compaq EVO N800c",
351 .matches = {
352 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
353 DMI_MATCH(DMI_PRODUCT_NAME, "EVO N800c"),
354 },
355 },
356#endif
c82bc5ad
MS
357 {
358 .callback = set_bf_sort,
739db07f 359 .ident = "HP ProLiant DL385 G2",
c82bc5ad
MS
360 .matches = {
361 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
739db07f 362 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL385 G2"),
c82bc5ad
MS
363 },
364 },
365 {
366 .callback = set_bf_sort,
739db07f 367 .ident = "HP ProLiant DL585 G2",
c82bc5ad
MS
368 .matches = {
369 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
739db07f 370 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL585 G2"),
c82bc5ad
MS
371 },
372 },
8c4b2cf9
BK
373 {}
374};
1da177e4 375
0df18ff3
YL
376void __init dmi_check_pciprobe(void)
377{
378 dmi_check_system(pciprobe_dmi_table);
379}
380
1da177e4
LT
381struct pci_bus * __devinit pcibios_scan_root(int busnum)
382{
383 struct pci_bus *bus = NULL;
08f1c192 384 struct pci_sysdata *sd;
1da177e4
LT
385
386 while ((bus = pci_find_next_bus(bus)) != NULL) {
387 if (bus->number == busnum) {
388 /* Already scanned */
389 return bus;
390 }
391 }
392
08f1c192
MBY
393 /* Allocate per-root-bus (not per bus) arch-specific data.
394 * TODO: leak; this memory is never freed.
395 * It's arguable whether it's worth the trouble to care.
396 */
397 sd = kzalloc(sizeof(*sd), GFP_KERNEL);
398 if (!sd) {
399 printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum);
400 return NULL;
401 }
402
871d5f8d
YL
403 sd->node = get_mp_bus_to_node(busnum);
404