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> |
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 | */ | |
79 | DEFINE_SPINLOCK(pci_config_lock); | |
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]; | |
128 | ||
129 | if (pci_probe & PCI_NOASSIGN_ROMS) { | |
130 | if (rom_r->parent) | |
131 | return; | |
132 | if (rom_r->start) { | |
133 | /* we deal with BIOS assigned ROM later */ | |
134 | return; | |
135 | } | |
136 | rom_r->start = rom_r->end = rom_r->flags = 0; | |
137 | } | |
138 | } | |
139 | ||
1da177e4 LT |
140 | /* |
141 | * Called after each bus is probed, but before its children | |
142 | * are examined. | |
143 | */ | |
144 | ||
0bb1be3e | 145 | void __devinit pcibios_fixup_bus(struct pci_bus *b) |
1da177e4 | 146 | { |
bb71ad88 GH |
147 | struct pci_dev *dev; |
148 | ||
0e94ecd0 YL |
149 | /* root bus? */ |
150 | if (!b->parent) | |
151 | x86_pci_root_bus_res_quirks(b); | |
1da177e4 | 152 | pci_read_bridge_bases(b); |
bb71ad88 GH |
153 | list_for_each_entry(dev, &b->devices, bus_list) |
154 | pcibios_fixup_device_resources(dev); | |
1da177e4 LT |
155 | } |
156 | ||
6b4b78fe MD |
157 | /* |
158 | * Only use DMI information to set this if nothing was passed | |
159 | * on the kernel command line (which was parsed earlier). | |
160 | */ | |
161 | ||
1855256c | 162 | static int __devinit set_bf_sort(const struct dmi_system_id *d) |
6b4b78fe MD |
163 | { |
164 | if (pci_bf_sort == pci_bf_sort_default) { | |
165 | pci_bf_sort = pci_dmi_bf; | |
166 | printk(KERN_INFO "PCI: %s detected, enabling pci=bfsort.\n", d->ident); | |
167 | } | |
168 | return 0; | |
169 | } | |
170 | ||
8c4b2cf9 BK |
171 | /* |
172 | * Enable renumbering of PCI bus# ranges to reach all PCI busses (Cardbus) | |
173 | */ | |
174 | #ifdef __i386__ | |
1855256c | 175 | static int __devinit assign_all_busses(const struct dmi_system_id *d) |
8c4b2cf9 BK |
176 | { |
177 | pci_probe |= PCI_ASSIGN_ALL_BUSSES; | |
178 | printk(KERN_INFO "%s detected: enabling PCI bus# renumbering" | |
179 | " (pci=assign-busses)\n", d->ident); | |
180 | return 0; | |
181 | } | |
182 | #endif | |
183 | ||
821508d4 | 184 | static const struct dmi_system_id __devinitconst pciprobe_dmi_table[] = { |
6b4b78fe | 185 | #ifdef __i386__ |
8c4b2cf9 BK |
186 | /* |
187 | * Laptops which need pci=assign-busses to see Cardbus cards | |
188 | */ | |
8c4b2cf9 BK |
189 | { |
190 | .callback = assign_all_busses, | |
191 | .ident = "Samsung X20 Laptop", | |
192 | .matches = { | |
193 | DMI_MATCH(DMI_SYS_VENDOR, "Samsung Electronics"), | |
194 | DMI_MATCH(DMI_PRODUCT_NAME, "SX20S"), | |
195 | }, | |
196 | }, | |
197 | #endif /* __i386__ */ | |
6b4b78fe MD |
198 | { |
199 | .callback = set_bf_sort, | |
200 | .ident = "Dell PowerEdge 1950", | |
201 | .matches = { | |
202 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
203 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1950"), | |
204 | }, | |
205 | }, | |
206 | { | |
207 | .callback = set_bf_sort, | |
208 | .ident = "Dell PowerEdge 1955", | |
209 | .matches = { | |
210 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
211 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1955"), | |
212 | }, | |
213 | }, | |
214 | { | |
215 | .callback = set_bf_sort, | |
216 | .ident = "Dell PowerEdge 2900", | |
217 | .matches = { | |
218 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
219 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2900"), | |
220 | }, | |
221 | }, | |
222 | { | |
223 | .callback = set_bf_sort, | |
224 | .ident = "Dell PowerEdge 2950", | |
225 | .matches = { | |
226 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
227 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2950"), | |
228 | }, | |
229 | }, | |
f7a9dae7 MD |
230 | { |
231 | .callback = set_bf_sort, | |
232 | .ident = "Dell PowerEdge R900", | |
233 | .matches = { | |
234 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
235 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge R900"), | |
236 | }, | |
237 | }, | |
f52383d3 AG |
238 | { |
239 | .callback = set_bf_sort, | |
240 | .ident = "HP ProLiant BL20p G3", | |
241 | .matches = { | |
242 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
243 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G3"), | |
244 | }, | |
245 | }, | |
246 | { | |
247 | .callback = set_bf_sort, | |
248 | .ident = "HP ProLiant BL20p G4", | |
249 | .matches = { | |
250 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
251 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G4"), | |
252 | }, | |
253 | }, | |
254 | { | |
255 | .callback = set_bf_sort, | |
256 | .ident = "HP ProLiant BL30p G1", | |
257 | .matches = { | |
258 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
259 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL30p G1"), | |
260 | }, | |
261 | }, | |
262 | { | |
263 | .callback = set_bf_sort, | |
264 | .ident = "HP ProLiant BL25p G1", | |
265 | .matches = { | |
266 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
267 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL25p G1"), | |
268 | }, | |
269 | }, | |
270 | { | |
271 | .callback = set_bf_sort, | |
272 | .ident = "HP ProLiant BL35p G1", | |
273 | .matches = { | |
274 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
275 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL35p G1"), | |
276 | }, | |
277 | }, | |
278 | { | |
279 | .callback = set_bf_sort, | |
280 | .ident = "HP ProLiant BL45p G1", | |
281 | .matches = { | |
282 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
283 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G1"), | |
284 | }, | |
285 | }, | |
286 | { | |
287 | .callback = set_bf_sort, | |
288 | .ident = "HP ProLiant BL45p G2", | |
289 | .matches = { | |
290 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
291 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G2"), | |
292 | }, | |
293 | }, | |
294 | { | |
295 | .callback = set_bf_sort, | |
296 | .ident = "HP ProLiant BL460c G1", | |
297 | .matches = { | |
298 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
299 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL460c G1"), | |
300 | }, | |
301 | }, | |
302 | { | |
303 | .callback = set_bf_sort, | |
304 | .ident = "HP ProLiant BL465c G1", | |
305 | .matches = { | |
306 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
307 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL465c G1"), | |
308 | }, | |
309 | }, | |
310 | { | |
311 | .callback = set_bf_sort, | |
312 | .ident = "HP ProLiant BL480c G1", | |
313 | .matches = { | |
314 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
315 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL480c G1"), | |
316 | }, | |
317 | }, | |
318 | { | |
319 | .callback = set_bf_sort, | |
320 | .ident = "HP ProLiant BL685c G1", | |
321 | .matches = { | |
322 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
323 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL685c G1"), | |
324 | }, | |
325 | }, | |
8f8ae1a7 MS |
326 | { |
327 | .callback = set_bf_sort, | |
8d64c781 | 328 | .ident = "HP ProLiant DL360", |
8f8ae1a7 MS |
329 | .matches = { |
330 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
8d64c781 | 331 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL360"), |
8f8ae1a7 MS |
332 | }, |
333 | }, | |
334 | { | |
335 | .callback = set_bf_sort, | |
8d64c781 | 336 | .ident = "HP ProLiant DL380", |
8f8ae1a7 MS |
337 | .matches = { |
338 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
8d64c781 | 339 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL380"), |
8f8ae1a7 MS |
340 | }, |
341 | }, | |
5b1ea82f JL |
342 | #ifdef __i386__ |
343 | { | |
344 | .callback = assign_all_busses, | |
345 | .ident = "Compaq EVO N800c", | |
346 | .matches = { | |
347 | DMI_MATCH(DMI_SYS_VENDOR, "Compaq"), | |
348 | DMI_MATCH(DMI_PRODUCT_NAME, "EVO N800c"), | |
349 | }, | |
350 | }, | |
351 | #endif | |
c82bc5ad MS |
352 | { |
353 | .callback = set_bf_sort, | |
739db07f | 354 | .ident = "HP ProLiant DL385 G2", |
c82bc5ad MS |
355 | .matches = { |
356 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
739db07f | 357 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL385 G2"), |
c82bc5ad MS |
358 | }, |
359 | }, | |
360 | { | |
361 | .callback = set_bf_sort, | |
739db07f | 362 | .ident = "HP ProLiant DL585 G2", |
c82bc5ad MS |
363 | .matches = { |
364 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
739db07f | 365 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL585 G2"), |
c82bc5ad MS |
366 | }, |
367 | }, | |
8c4b2cf9 BK |
368 | {} |
369 | }; | |
1da177e4 | 370 | |
0df18ff3 YL |
371 | void __init dmi_check_pciprobe(void) |
372 | { | |
373 | dmi_check_system(pciprobe_dmi_table); | |
374 | } | |
375 | ||
1da177e4 LT |
376 | struct pci_bus * __devinit pcibios_scan_root(int busnum) |
377 | { | |
378 | struct pci_bus *bus = NULL; | |
08f1c192 | 379 | struct pci_sysdata *sd; |
1da177e4 LT |
380 | |
381 | while ((bus = pci_find_next_bus(bus)) != NULL) { | |
382 | if (bus->number == busnum) { | |
383 | /* Already scanned */ | |
384 | return bus; | |
385 | } | |
386 | } | |
387 | ||
08f1c192 MBY |
388 | /* Allocate per-root-bus (not per bus) arch-specific data. |
389 | * TODO: leak; this memory is never freed. | |
390 | * It's arguable whether it's worth the trouble to care. | |
391 | */ | |
392 | sd = kzalloc(sizeof(*sd), GFP_KERNEL); | |
393 | if (!sd) { | |
394 | printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum); | |
395 | return NULL; | |
396 | } | |
397 | ||
871d5f8d YL |
398 | sd->node = get_mp_bus_to_node(busnum); |
399 |