PCI/PCIe: Clear Root PME Status bits early during system resume
[deliverable/linux.git] / arch / x86 / pci / common.c
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>
5a0e3ad6 12#include <linux/slab.h>
1da177e4
LT
13
14#include <asm/acpi.h>
15#include <asm/segment.h>
16#include <asm/io.h>
17#include <asm/smp.h>
82487711 18#include <asm/pci_x86.h>
1da177e4 19
1da177e4
LT
20unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 |
21 PCI_PROBE_MMCONF;
22
e3f2baeb 23unsigned int pci_early_dump_regs;
2b290da0 24static int pci_bf_sort;
1da177e4 25int pci_routeirq;
a9322f64 26int noioapicquirk;
41b9eb26
SA
27#ifdef CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS
28int noioapicreroute = 0;
29#else
9197979b 30int noioapicreroute = 1;
41b9eb26 31#endif
1da177e4 32int pcibios_last_bus = -1;
120bb424 33unsigned long pirq_table_addr;
34struct pci_bus *pci_root_bus;
1da177e4 35struct pci_raw_ops *raw_pci_ops;
b6ce068a
MW
36struct pci_raw_ops *raw_pci_ext_ops;
37
38int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
39 int reg, int len, u32 *val)
40{
beef3129 41 if (domain == 0 && reg < 256 && raw_pci_ops)
b6ce068a
MW
42 return raw_pci_ops->read(domain, bus, devfn, reg, len, val);
43 if (raw_pci_ext_ops)
44 return raw_pci_ext_ops->read(domain, bus, devfn, reg, len, val);
45 return -EINVAL;
46}
47
48int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
49 int reg, int len, u32 val)
50{
beef3129 51 if (domain == 0 && reg < 256 && raw_pci_ops)
b6ce068a
MW
52 return raw_pci_ops->write(domain, bus, devfn, reg, len, val);
53 if (raw_pci_ext_ops)
54 return raw_pci_ext_ops->write(domain, bus, devfn, reg, len, val);
55 return -EINVAL;
56}
1da177e4
LT
57
58static int pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value)
59{
b6ce068a 60 return raw_pci_read(pci_domain_nr(bus), bus->number,
a79e4198 61 devfn, where, size, value);
1da177e4
LT
62}
63
64static int pci_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value)
65{
b6ce068a 66 return raw_pci_write(pci_domain_nr(bus), bus->number,
a79e4198 67 devfn, where, size, value);
1da177e4
LT
68}
69
70struct pci_ops pci_root_ops = {
71 .read = pci_read,
72 .write = pci_write,
73};
74
1da177e4
LT
75/*
76 * This interrupt-safe spinlock protects all accesses to PCI
77 * configuration space.
78 */
d19f61f0 79DEFINE_RAW_SPINLOCK(pci_config_lock);
1da177e4 80
13a6ddb0
YL
81static int __devinit can_skip_ioresource_align(const struct dmi_system_id *d)
82{
83 pci_probe |= PCI_CAN_SKIP_ISA_ALIGN;
84 printk(KERN_INFO "PCI: %s detected, can skip ISA alignment\n", d->ident);
85 return 0;
86}
87
821508d4 88static const struct dmi_system_id can_skip_pciprobe_dmi_table[] __devinitconst = {
13a6ddb0
YL
89/*
90 * Systems where PCI IO resource ISA alignment can be skipped
91 * when the ISA enable bit in the bridge control is not set
92 */
93 {
94 .callback = can_skip_ioresource_align,
95 .ident = "IBM System x3800",
96 .matches = {
97 DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
98 DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
99 },
100 },
101 {
102 .callback = can_skip_ioresource_align,
103 .ident = "IBM System x3850",
104 .matches = {
105 DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
106 DMI_MATCH(DMI_PRODUCT_NAME, "x3850"),
107 },
108 },
109 {
110 .callback = can_skip_ioresource_align,
111 .ident = "IBM System x3950",
112 .matches = {
113 DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
114 DMI_MATCH(DMI_PRODUCT_NAME, "x3950"),
115 },
116 },
117 {}
118};
119
120void __init dmi_check_skip_isa_align(void)
121{
122 dmi_check_system(can_skip_pciprobe_dmi_table);
123}
124
bb71ad88
GH
125static void __devinit pcibios_fixup_device_resources(struct pci_dev *dev)
126{
127 struct resource *rom_r = &dev->resource[PCI_ROM_RESOURCE];
7bd1c365
MH
128 struct resource *bar_r;
129 int bar;
130
131 if (pci_probe & PCI_NOASSIGN_BARS) {
132 /*
133 * If the BIOS did not assign the BAR, zero out the
134 * resource so the kernel doesn't attmept to assign
135 * it later on in pci_assign_unassigned_resources
136 */
137 for (bar = 0; bar <= PCI_STD_RESOURCE_END; bar++) {
138 bar_r = &dev->resource[bar];
139 if (bar_r->start == 0 && bar_r->end != 0) {
140 bar_r->flags = 0;
141 bar_r->end = 0;
142 }
143 }
144 }
bb71ad88
GH
145
146 if (pci_probe & PCI_NOASSIGN_ROMS) {
147 if (rom_r->parent)
148 return;
149 if (rom_r->start) {
150 /* we deal with BIOS assigned ROM later */
151 return;
152 }
153 rom_r->start = rom_r->end = rom_r->flags = 0;
154 }
155}
156
1da177e4
LT
157/*
158 * Called after each bus is probed, but before its children
159 * are examined.
160 */
161
0bb1be3e 162void __devinit pcibios_fixup_bus(struct pci_bus *b)
1da177e4 163{
bb71ad88
GH
164 struct pci_dev *dev;
165
0e94ecd0
YL
166 /* root bus? */
167 if (!b->parent)
168 x86_pci_root_bus_res_quirks(b);
1da177e4 169 pci_read_bridge_bases(b);
bb71ad88
GH
170 list_for_each_entry(dev, &b->devices, bus_list)
171 pcibios_fixup_device_resources(dev);
1da177e4
LT
172}
173
6b4b78fe
MD
174/*
175 * Only use DMI information to set this if nothing was passed
176 * on the kernel command line (which was parsed earlier).
177 */
178
1855256c 179static int __devinit set_bf_sort(const struct dmi_system_id *d)
6b4b78fe
MD
180{
181 if (pci_bf_sort == pci_bf_sort_default) {
182 pci_bf_sort = pci_dmi_bf;
183 printk(KERN_INFO "PCI: %s detected, enabling pci=bfsort.\n", d->ident);
184 }
185 return 0;
186}
187
8c4b2cf9
BK
188/*
189 * Enable renumbering of PCI bus# ranges to reach all PCI busses (Cardbus)
190 */
191#ifdef __i386__
1855256c 192static int __devinit assign_all_busses(const struct dmi_system_id *d)
8c4b2cf9
BK
193{
194 pci_probe |= PCI_ASSIGN_ALL_BUSSES;
195 printk(KERN_INFO "%s detected: enabling PCI bus# renumbering"
196 " (pci=assign-busses)\n", d->ident);
197 return 0;
198}
199#endif
200
821508d4 201static const struct dmi_system_id __devinitconst pciprobe_dmi_table[] = {
6b4b78fe 202#ifdef __i386__
8c4b2cf9
BK
203/*
204 * Laptops which need pci=assign-busses to see Cardbus cards
205 */
8c4b2cf9
BK
206 {
207 .callback = assign_all_busses,
208 .ident = "Samsung X20 Laptop",
209 .matches = {
210 DMI_MATCH(DMI_SYS_VENDOR, "Samsung Electronics"),
211 DMI_MATCH(DMI_PRODUCT_NAME, "SX20S"),
212 },
213 },
214#endif /* __i386__ */
6b4b78fe
MD
215 {
216 .callback = set_bf_sort,
217 .ident = "Dell PowerEdge 1950",
218 .matches = {
219 DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
220 DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1950"),
221 },
222 },
223 {
224 .callback = set_bf_sort,
225 .ident = "Dell PowerEdge 1955",
226 .matches = {
227 DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
228 DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1955"),
229 },
230 },
231 {
232 .callback = set_bf_sort,
233 .ident = "Dell PowerEdge 2900",
234 .matches = {
235 DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
236 DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2900"),
237 },
238 },
239 {
240 .callback = set_bf_sort,
241 .ident = "Dell PowerEdge 2950",
242 .matches = {
243 DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
244 DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2950"),
245 },
246 },
f7a9dae7
MD
247 {
248 .callback = set_bf_sort,
249 .ident = "Dell PowerEdge R900",
250 .matches = {
251 DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
252 DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge R900"),
253 },
254 },
f52383d3
AG
255 {
256 .callback = set_bf_sort,
257 .ident = "HP ProLiant BL20p G3",
258 .matches = {
259 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
260 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G3"),
261 },
262 },
263 {
264 .callback = set_bf_sort,
265 .ident = "HP ProLiant BL20p G4",
266 .matches = {
267 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
268 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G4"),
269 },
270 },
271 {
272 .callback = set_bf_sort,
273 .ident = "HP ProLiant BL30p G1",
274 .matches = {
275 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
276 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL30p G1"),
277 },
278 },
279 {
280 .callback = set_bf_sort,
281 .ident = "HP ProLiant BL25p G1",
282 .matches = {
283 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
284 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL25p G1"),
285 },
286 },
287 {
288 .callback = set_bf_sort,
289 .ident = "HP ProLiant BL35p G1",
290 .matches = {
291 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
292 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL35p G1"),
293 },
294 },
295 {
296 .callback = set_bf_sort,
297 .ident = "HP ProLiant BL45p G1",
298 .matches = {
299 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
300 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G1"),
301 },
302 },
303 {
304 .callback = set_bf_sort,
305 .ident = "HP ProLiant BL45p G2",
306 .matches = {
307 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
308 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G2"),
309 },
310 },
311 {
312 .callback = set_bf_sort,
313 .ident = "HP ProLiant BL460c G1",
314 .matches = {
315 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
316 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL460c G1"),
317 },
318 },
319 {
320 .callback = set_bf_sort,
321 .ident = "HP ProLiant BL465c G1",
322 .matches = {
323 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
324 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL465c G1"),
325 },
326 },
327 {
328 .callback = set_bf_sort,
329 .ident = "HP ProLiant BL480c G1",
330 .matches = {
331 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
332 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL480c G1"),
333 },
334 },
335 {
336 .callback = set_bf_sort,
337 .ident = "HP ProLiant BL685c G1",
338 .matches = {
339 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
340 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL685c G1"),
341 },
342 },
8f8ae1a7
MS
343 {
344 .callback = set_bf_sort,
8d64c781 345 .ident = "HP ProLiant DL360",
8f8ae1a7
MS
346 .matches = {
347 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
8d64c781 348 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL360"),
8f8ae1a7
MS
349 },
350 },
351 {
352 .callback = set_bf_sort,
8d64c781 353 .ident = "HP ProLiant DL380",
8f8ae1a7
MS
354 .matches = {
355 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
8d64c781 356 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL380"),
8f8ae1a7
MS
357 },
358 },
5b1ea82f
JL
359#ifdef __i386__
360 {
361 .callback = assign_all_busses,
362 .ident = "Compaq EVO N800c",
363 .matches = {
364 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
365 DMI_MATCH(DMI_PRODUCT_NAME, "EVO N800c"),
366 },
367 },
368#endif
c82bc5ad
MS
369 {
370 .callback = set_bf_sort,
739db07f 371 .ident = "HP ProLiant DL385 G2",
c82bc5ad
MS
372 .matches = {
373 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
739db07f 374 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL385 G2"),
c82bc5ad
MS
375 },
376 },
377 {
378 .callback = set_bf_sort,
739db07f 379 .ident = "HP ProLiant DL585 G2",
c82bc5ad
MS
380 .matches = {
381 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
739db07f 382 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL585 G2"),
c82bc5ad
MS
383 },
384 },
8c4b2cf9
BK
385 {}
386};
1da177e4 387
0df18ff3
YL
388void __init dmi_check_pciprobe(void)
389{
390 dmi_check_system(pciprobe_dmi_table);
391}
392
1da177e4
LT
393struct pci_bus * __devinit pcibios_scan_root(int busnum)
394{
395 struct pci_bus *bus = NULL;
08f1c192 396 struct pci_sysdata *sd;
1da177e4
LT
397
398 while ((bus = pci_find_next_bus(bus)) != NULL) {
399 if (bus->number == busnum) {
400 /* Already scanned */
401 return bus;
402 }
403 }
404
08f1c192
MBY
405 /* Allocate per-root-bus (not per bus) arch-specific data.
406 * TODO: leak; this memory is never freed.
407 * It's arguable whether it's worth the trouble to care.
408 */
409 sd = kzalloc(sizeof(*sd), GFP_KERNEL);
410 if (!sd) {
411 printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum);
412 return NULL;
413 }
414
871d5f8d
YL
415 sd->node = get_mp_bus_to_node(busnum);
416