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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> |
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 |
20 | unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 | |
21 | PCI_PROBE_MMCONF; | |
22 | ||
e3f2baeb | 23 | unsigned int pci_early_dump_regs; |
2b290da0 | 24 | static int pci_bf_sort; |
1da177e4 | 25 | int pci_routeirq; |
a9322f64 | 26 | int noioapicquirk; |
41b9eb26 SA |
27 | #ifdef CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS |
28 | int noioapicreroute = 0; | |
29 | #else | |
9197979b | 30 | int noioapicreroute = 1; |
41b9eb26 | 31 | #endif |
1da177e4 | 32 | int pcibios_last_bus = -1; |
120bb424 | 33 | unsigned long pirq_table_addr; |
34 | struct pci_bus *pci_root_bus; | |
1da177e4 | 35 | struct pci_raw_ops *raw_pci_ops; |
b6ce068a MW |
36 | struct pci_raw_ops *raw_pci_ext_ops; |
37 | ||
38 | int 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 | ||
48 | int 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 | |
58 | static 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 | ||
64 | static 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 | ||
70 | struct 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 | 79 | DEFINE_RAW_SPINLOCK(pci_config_lock); |
1da177e4 | 80 | |
13a6ddb0 YL |
81 | static 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 | 88 | static 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 | ||
120 | void __init dmi_check_skip_isa_align(void) | |
121 | { | |
122 | dmi_check_system(can_skip_pciprobe_dmi_table); | |
123 | } | |
124 | ||
bb71ad88 GH |
125 | static 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 | 162 | void __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 | 179 | static 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 | 192 | static 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 | 201 | static 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 |
388 | void __init dmi_check_pciprobe(void) |
389 | { | |
390 | dmi_check_system(pciprobe_dmi_table); | |
391 | } | |
392 | ||
1da177e4 LT |
393 | struct 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 | ||