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Commit | Line | Data |
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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 |
19 | unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 | |
20 | PCI_PROBE_MMCONF; | |
21 | ||
e3f2baeb | 22 | unsigned int pci_early_dump_regs; |
2b290da0 | 23 | static int pci_bf_sort; |
1da177e4 | 24 | int pci_routeirq; |
a9322f64 | 25 | int noioapicquirk; |
41b9eb26 SA |
26 | #ifdef CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS |
27 | int noioapicreroute = 0; | |
28 | #else | |
9197979b | 29 | int noioapicreroute = 1; |
41b9eb26 | 30 | #endif |
1da177e4 | 31 | int pcibios_last_bus = -1; |
120bb424 | 32 | unsigned long pirq_table_addr; |
33 | struct pci_bus *pci_root_bus; | |
1da177e4 | 34 | struct pci_raw_ops *raw_pci_ops; |
b6ce068a MW |
35 | struct pci_raw_ops *raw_pci_ext_ops; |
36 | ||
37 | int 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 | ||
47 | int 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 | |
57 | static 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 | ||
63 | static 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 | ||
69 | struct 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 | */ | |
78 | int pcibios_scanned; | |
79 | ||
80 | /* | |
81 | * This interrupt-safe spinlock protects all accesses to PCI | |
82 | * configuration space. | |
83 | */ | |
84 | DEFINE_SPINLOCK(pci_config_lock); | |
85 | ||
13a6ddb0 YL |
86 | static 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 | 93 | static 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 | ||
125 | void __init dmi_check_skip_isa_align(void) | |
126 | { | |
127 | dmi_check_system(can_skip_pciprobe_dmi_table); | |
128 | } | |
129 | ||
bb71ad88 GH |
130 | static 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 | 150 | void __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 | 167 | static 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 | 180 | static 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 | 189 | static 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 |
376 | void __init dmi_check_pciprobe(void) |
377 | { | |
378 | dmi_check_system(pciprobe_dmi_table); | |
379 | } | |
380 | ||
1da177e4 LT |
381 | struct 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 | ||