Commit | Line | Data |
---|---|---|
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 | ||
93 | static struct dmi_system_id can_skip_pciprobe_dmi_table[] __devinitdata = { | |
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 | ||
150 | void __devinit pcibios_fixup_bus(struct pci_bus *b) | |
151 | { | |
bb71ad88 GH |
152 | struct pci_dev *dev; |
153 | ||
1da177e4 | 154 | pci_read_bridge_bases(b); |
bb71ad88 GH |
155 | list_for_each_entry(dev, &b->devices, bus_list) |
156 | pcibios_fixup_device_resources(dev); | |
1da177e4 LT |
157 | } |
158 | ||
6b4b78fe MD |
159 | /* |
160 | * Only use DMI information to set this if nothing was passed | |
161 | * on the kernel command line (which was parsed earlier). | |
162 | */ | |
163 | ||
1855256c | 164 | static int __devinit set_bf_sort(const struct dmi_system_id *d) |
6b4b78fe MD |
165 | { |
166 | if (pci_bf_sort == pci_bf_sort_default) { | |
167 | pci_bf_sort = pci_dmi_bf; | |
168 | printk(KERN_INFO "PCI: %s detected, enabling pci=bfsort.\n", d->ident); | |
169 | } | |
170 | return 0; | |
171 | } | |
172 | ||
8c4b2cf9 BK |
173 | /* |
174 | * Enable renumbering of PCI bus# ranges to reach all PCI busses (Cardbus) | |
175 | */ | |
176 | #ifdef __i386__ | |
1855256c | 177 | static int __devinit assign_all_busses(const struct dmi_system_id *d) |
8c4b2cf9 BK |
178 | { |
179 | pci_probe |= PCI_ASSIGN_ALL_BUSSES; | |
180 | printk(KERN_INFO "%s detected: enabling PCI bus# renumbering" | |
181 | " (pci=assign-busses)\n", d->ident); | |
182 | return 0; | |
183 | } | |
184 | #endif | |
185 | ||
6b4b78fe MD |
186 | static struct dmi_system_id __devinitdata pciprobe_dmi_table[] = { |
187 | #ifdef __i386__ | |
8c4b2cf9 BK |
188 | /* |
189 | * Laptops which need pci=assign-busses to see Cardbus cards | |
190 | */ | |
8c4b2cf9 BK |
191 | { |
192 | .callback = assign_all_busses, | |
193 | .ident = "Samsung X20 Laptop", | |
194 | .matches = { | |
195 | DMI_MATCH(DMI_SYS_VENDOR, "Samsung Electronics"), | |
196 | DMI_MATCH(DMI_PRODUCT_NAME, "SX20S"), | |
197 | }, | |
198 | }, | |
199 | #endif /* __i386__ */ | |
6b4b78fe MD |
200 | { |
201 | .callback = set_bf_sort, | |
202 | .ident = "Dell PowerEdge 1950", | |
203 | .matches = { | |
204 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
205 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1950"), | |
206 | }, | |
207 | }, | |
208 | { | |
209 | .callback = set_bf_sort, | |
210 | .ident = "Dell PowerEdge 1955", | |
211 | .matches = { | |
212 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
213 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1955"), | |
214 | }, | |
215 | }, | |
216 | { | |
217 | .callback = set_bf_sort, | |
218 | .ident = "Dell PowerEdge 2900", | |
219 | .matches = { | |
220 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
221 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2900"), | |
222 | }, | |
223 | }, | |
224 | { | |
225 | .callback = set_bf_sort, | |
226 | .ident = "Dell PowerEdge 2950", | |
227 | .matches = { | |
228 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
229 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2950"), | |
230 | }, | |
231 | }, | |
f7a9dae7 MD |
232 | { |
233 | .callback = set_bf_sort, | |
234 | .ident = "Dell PowerEdge R900", | |
235 | .matches = { | |
236 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
237 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge R900"), | |
238 | }, | |
239 | }, | |
f52383d3 AG |
240 | { |
241 | .callback = set_bf_sort, | |
242 | .ident = "HP ProLiant BL20p G3", | |
243 | .matches = { | |
244 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
245 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G3"), | |
246 | }, | |
247 | }, | |
248 | { | |
249 | .callback = set_bf_sort, | |
250 | .ident = "HP ProLiant BL20p G4", | |
251 | .matches = { | |
252 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
253 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G4"), | |
254 | }, | |
255 | }, | |
256 | { | |
257 | .callback = set_bf_sort, | |
258 | .ident = "HP ProLiant BL30p G1", | |
259 | .matches = { | |
260 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
261 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL30p G1"), | |
262 | }, | |
263 | }, | |
264 | { | |
265 | .callback = set_bf_sort, | |
266 | .ident = "HP ProLiant BL25p G1", | |
267 | .matches = { | |
268 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
269 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL25p G1"), | |
270 | }, | |
271 | }, | |
272 | { | |
273 | .callback = set_bf_sort, | |
274 | .ident = "HP ProLiant BL35p G1", | |
275 | .matches = { | |
276 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
277 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL35p G1"), | |
278 | }, | |
279 | }, | |
280 | { | |
281 | .callback = set_bf_sort, | |
282 | .ident = "HP ProLiant BL45p G1", | |
283 | .matches = { | |
284 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
285 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G1"), | |
286 | }, | |
287 | }, | |
288 | { | |
289 | .callback = set_bf_sort, | |
290 | .ident = "HP ProLiant BL45p G2", | |
291 | .matches = { | |
292 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
293 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G2"), | |
294 | }, | |
295 | }, | |
296 | { | |
297 | .callback = set_bf_sort, | |
298 | .ident = "HP ProLiant BL460c G1", | |
299 | .matches = { | |
300 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
301 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL460c G1"), | |
302 | }, | |
303 | }, | |
304 | { | |
305 | .callback = set_bf_sort, | |
306 | .ident = "HP ProLiant BL465c G1", | |
307 | .matches = { | |
308 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
309 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL465c G1"), | |
310 | }, | |
311 | }, | |
312 | { | |
313 | .callback = set_bf_sort, | |
314 | .ident = "HP ProLiant BL480c G1", | |
315 | .matches = { | |
316 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
317 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL480c G1"), | |
318 | }, | |
319 | }, | |
320 | { | |
321 | .callback = set_bf_sort, | |
322 | .ident = "HP ProLiant BL685c G1", | |
323 | .matches = { | |
324 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
325 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL685c G1"), | |
326 | }, | |
327 | }, | |
8f8ae1a7 MS |
328 | { |
329 | .callback = set_bf_sort, | |
8d64c781 | 330 | .ident = "HP ProLiant DL360", |
8f8ae1a7 MS |
331 | .matches = { |
332 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
8d64c781 | 333 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL360"), |
8f8ae1a7 MS |
334 | }, |
335 | }, | |
336 | { | |
337 | .callback = set_bf_sort, | |
8d64c781 | 338 | .ident = "HP ProLiant DL380", |
8f8ae1a7 MS |
339 | .matches = { |
340 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
8d64c781 | 341 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL380"), |
8f8ae1a7 MS |
342 | }, |
343 | }, | |
5b1ea82f JL |
344 | #ifdef __i386__ |
345 | { | |
346 | .callback = assign_all_busses, | |
347 | .ident = "Compaq EVO N800c", | |
348 | .matches = { | |
349 | DMI_MATCH(DMI_SYS_VENDOR, "Compaq"), | |
350 | DMI_MATCH(DMI_PRODUCT_NAME, "EVO N800c"), | |
351 | }, | |
352 | }, | |
353 | #endif | |
c82bc5ad MS |
354 | { |
355 | .callback = set_bf_sort, | |
739db07f | 356 | .ident = "HP ProLiant DL385 G2", |
c82bc5ad MS |
357 | .matches = { |
358 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
739db07f | 359 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL385 G2"), |
c82bc5ad MS |
360 | }, |
361 | }, | |
362 | { | |
363 | .callback = set_bf_sort, | |
739db07f | 364 | .ident = "HP ProLiant DL585 G2", |
c82bc5ad MS |
365 | .matches = { |
366 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
739db07f | 367 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL585 G2"), |
c82bc5ad MS |
368 | }, |
369 | }, | |
8c4b2cf9 BK |
370 | {} |
371 | }; | |
1da177e4 | 372 | |
0df18ff3 YL |
373 | void __init dmi_check_pciprobe(void) |
374 | { | |
375 | dmi_check_system(pciprobe_dmi_table); | |
376 | } | |
377 | ||
1da177e4 LT |
378 | struct pci_bus * __devinit pcibios_scan_root(int busnum) |
379 | { | |
380 | struct pci_bus *bus = NULL; | |
08f1c192 | 381 | struct pci_sysdata *sd; |
1da177e4 LT |
382 | |
383 | while ((bus = pci_find_next_bus(bus)) != NULL) { | |
384 | if (bus->number == busnum) { | |
385 | /* Already scanned */ | |
386 | return bus; | |
387 | } | |
388 | } | |
389 | ||
08f1c192 MBY |
390 | /* Allocate per-root-bus (not per bus) arch-specific data. |
391 | * TODO: leak; this memory is never freed. | |
392 | * It's arguable whether it's worth the trouble to care. | |
393 | */ | |
394 | sd = kzalloc(sizeof(*sd), GFP_KERNEL); | |
395 | if (!sd) { | |
396 | printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum); | |
397 | return NULL; | |
398 | } | |
399 | ||
871d5f8d YL |
400 | sd->node = get_mp_bus_to_node(busnum); |
401 |