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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> | |
17 | ||
18 | #include "pci.h" | |
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 LT |
25 | int pci_routeirq; |
26 | int pcibios_last_bus = -1; | |
120bb424 | 27 | unsigned long pirq_table_addr; |
28 | struct pci_bus *pci_root_bus; | |
1da177e4 | 29 | struct pci_raw_ops *raw_pci_ops; |
b6ce068a MW |
30 | struct pci_raw_ops *raw_pci_ext_ops; |
31 | ||
32 | int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn, | |
33 | int reg, int len, u32 *val) | |
34 | { | |
beef3129 | 35 | if (domain == 0 && reg < 256 && raw_pci_ops) |
b6ce068a MW |
36 | return raw_pci_ops->read(domain, bus, devfn, reg, len, val); |
37 | if (raw_pci_ext_ops) | |
38 | return raw_pci_ext_ops->read(domain, bus, devfn, reg, len, val); | |
39 | return -EINVAL; | |
40 | } | |
41 | ||
42 | int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn, | |
43 | int reg, int len, u32 val) | |
44 | { | |
beef3129 | 45 | if (domain == 0 && reg < 256 && raw_pci_ops) |
b6ce068a MW |
46 | return raw_pci_ops->write(domain, bus, devfn, reg, len, val); |
47 | if (raw_pci_ext_ops) | |
48 | return raw_pci_ext_ops->write(domain, bus, devfn, reg, len, val); | |
49 | return -EINVAL; | |
50 | } | |
1da177e4 LT |
51 | |
52 | static int pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value) | |
53 | { | |
b6ce068a | 54 | return raw_pci_read(pci_domain_nr(bus), bus->number, |
a79e4198 | 55 | devfn, where, size, value); |
1da177e4 LT |
56 | } |
57 | ||
58 | static int pci_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value) | |
59 | { | |
b6ce068a | 60 | return raw_pci_write(pci_domain_nr(bus), bus->number, |
a79e4198 | 61 | devfn, where, size, value); |
1da177e4 LT |
62 | } |
63 | ||
64 | struct pci_ops pci_root_ops = { | |
65 | .read = pci_read, | |
66 | .write = pci_write, | |
67 | }; | |
68 | ||
69 | /* | |
70 | * legacy, numa, and acpi all want to call pcibios_scan_root | |
71 | * from their initcalls. This flag prevents that. | |
72 | */ | |
73 | int pcibios_scanned; | |
74 | ||
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 | ||
88 | static struct dmi_system_id can_skip_pciprobe_dmi_table[] __devinitdata = { | |
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 | ||
145 | void __devinit pcibios_fixup_bus(struct pci_bus *b) | |
146 | { | |
bb71ad88 GH |
147 | struct pci_dev *dev; |
148 | ||
1da177e4 | 149 | pci_read_bridge_bases(b); |
bb71ad88 GH |
150 | list_for_each_entry(dev, &b->devices, bus_list) |
151 | pcibios_fixup_device_resources(dev); | |
1da177e4 LT |
152 | } |
153 | ||
6b4b78fe MD |
154 | /* |
155 | * Only use DMI information to set this if nothing was passed | |
156 | * on the kernel command line (which was parsed earlier). | |
157 | */ | |
158 | ||
1855256c | 159 | static int __devinit set_bf_sort(const struct dmi_system_id *d) |
6b4b78fe MD |
160 | { |
161 | if (pci_bf_sort == pci_bf_sort_default) { | |
162 | pci_bf_sort = pci_dmi_bf; | |
163 | printk(KERN_INFO "PCI: %s detected, enabling pci=bfsort.\n", d->ident); | |
164 | } | |
165 | return 0; | |
166 | } | |
167 | ||
8c4b2cf9 BK |
168 | /* |
169 | * Enable renumbering of PCI bus# ranges to reach all PCI busses (Cardbus) | |
170 | */ | |
171 | #ifdef __i386__ | |
1855256c | 172 | static int __devinit assign_all_busses(const struct dmi_system_id *d) |
8c4b2cf9 BK |
173 | { |
174 | pci_probe |= PCI_ASSIGN_ALL_BUSSES; | |
175 | printk(KERN_INFO "%s detected: enabling PCI bus# renumbering" | |
176 | " (pci=assign-busses)\n", d->ident); | |
177 | return 0; | |
178 | } | |
179 | #endif | |
180 | ||
6b4b78fe MD |
181 | static struct dmi_system_id __devinitdata pciprobe_dmi_table[] = { |
182 | #ifdef __i386__ | |
8c4b2cf9 BK |
183 | /* |
184 | * Laptops which need pci=assign-busses to see Cardbus cards | |
185 | */ | |
8c4b2cf9 BK |
186 | { |
187 | .callback = assign_all_busses, | |
188 | .ident = "Samsung X20 Laptop", | |
189 | .matches = { | |
190 | DMI_MATCH(DMI_SYS_VENDOR, "Samsung Electronics"), | |
191 | DMI_MATCH(DMI_PRODUCT_NAME, "SX20S"), | |
192 | }, | |
193 | }, | |
194 | #endif /* __i386__ */ | |
6b4b78fe MD |
195 | { |
196 | .callback = set_bf_sort, | |
197 | .ident = "Dell PowerEdge 1950", | |
198 | .matches = { | |
199 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
200 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1950"), | |
201 | }, | |
202 | }, | |
203 | { | |
204 | .callback = set_bf_sort, | |
205 | .ident = "Dell PowerEdge 1955", | |
206 | .matches = { | |
207 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
208 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1955"), | |
209 | }, | |
210 | }, | |
211 | { | |
212 | .callback = set_bf_sort, | |
213 | .ident = "Dell PowerEdge 2900", | |
214 | .matches = { | |
215 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
216 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2900"), | |
217 | }, | |
218 | }, | |
219 | { | |
220 | .callback = set_bf_sort, | |
221 | .ident = "Dell PowerEdge 2950", | |
222 | .matches = { | |
223 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
224 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2950"), | |
225 | }, | |
226 | }, | |
f7a9dae7 MD |
227 | { |
228 | .callback = set_bf_sort, | |
229 | .ident = "Dell PowerEdge R900", | |
230 | .matches = { | |
231 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
232 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge R900"), | |
233 | }, | |
234 | }, | |
f52383d3 AG |
235 | { |
236 | .callback = set_bf_sort, | |
237 | .ident = "HP ProLiant BL20p G3", | |
238 | .matches = { | |
239 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
240 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G3"), | |
241 | }, | |
242 | }, | |
243 | { | |
244 | .callback = set_bf_sort, | |
245 | .ident = "HP ProLiant BL20p G4", | |
246 | .matches = { | |
247 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
248 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G4"), | |
249 | }, | |
250 | }, | |
251 | { | |
252 | .callback = set_bf_sort, | |
253 | .ident = "HP ProLiant BL30p G1", | |
254 | .matches = { | |
255 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
256 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL30p G1"), | |
257 | }, | |
258 | }, | |
259 | { | |
260 | .callback = set_bf_sort, | |
261 | .ident = "HP ProLiant BL25p G1", | |
262 | .matches = { | |
263 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
264 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL25p G1"), | |
265 | }, | |
266 | }, | |
267 | { | |
268 | .callback = set_bf_sort, | |
269 | .ident = "HP ProLiant BL35p G1", | |
270 | .matches = { | |
271 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
272 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL35p G1"), | |
273 | }, | |
274 | }, | |
275 | { | |
276 | .callback = set_bf_sort, | |
277 | .ident = "HP ProLiant BL45p G1", | |
278 | .matches = { | |
279 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
280 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G1"), | |
281 | }, | |
282 | }, | |
283 | { | |
284 | .callback = set_bf_sort, | |
285 | .ident = "HP ProLiant BL45p G2", | |
286 | .matches = { | |
287 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
288 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G2"), | |
289 | }, | |
290 | }, | |
291 | { | |
292 | .callback = set_bf_sort, | |
293 | .ident = "HP ProLiant BL460c G1", | |
294 | .matches = { | |
295 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
296 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL460c G1"), | |
297 | }, | |
298 | }, | |
299 | { | |
300 | .callback = set_bf_sort, | |
301 | .ident = "HP ProLiant BL465c G1", | |
302 | .matches = { | |
303 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
304 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL465c G1"), | |
305 | }, | |
306 | }, | |
307 | { | |
308 | .callback = set_bf_sort, | |
309 | .ident = "HP ProLiant BL480c G1", | |
310 | .matches = { | |
311 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
312 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL480c G1"), | |
313 | }, | |
314 | }, | |
315 | { | |
316 | .callback = set_bf_sort, | |
317 | .ident = "HP ProLiant BL685c G1", | |
318 | .matches = { | |
319 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
320 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL685c G1"), | |
321 | }, | |
322 | }, | |
8f8ae1a7 MS |
323 | { |
324 | .callback = set_bf_sort, | |
8d64c781 | 325 | .ident = "HP ProLiant DL360", |
8f8ae1a7 MS |
326 | .matches = { |
327 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
8d64c781 | 328 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL360"), |
8f8ae1a7 MS |
329 | }, |
330 | }, | |
331 | { | |
332 | .callback = set_bf_sort, | |
8d64c781 | 333 | .ident = "HP ProLiant DL380", |
8f8ae1a7 MS |
334 | .matches = { |
335 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
8d64c781 | 336 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL380"), |
8f8ae1a7 MS |
337 | }, |
338 | }, | |
5b1ea82f JL |
339 | #ifdef __i386__ |
340 | { | |
341 | .callback = assign_all_busses, | |
342 | .ident = "Compaq EVO N800c", | |
343 | .matches = { | |
344 | DMI_MATCH(DMI_SYS_VENDOR, "Compaq"), | |
345 | DMI_MATCH(DMI_PRODUCT_NAME, "EVO N800c"), | |
346 | }, | |
347 | }, | |
348 | #endif | |
c82bc5ad MS |
349 | { |
350 | .callback = set_bf_sort, | |
739db07f | 351 | .ident = "HP ProLiant DL385 G2", |
c82bc5ad MS |
352 | .matches = { |
353 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
739db07f | 354 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL385 G2"), |
c82bc5ad MS |
355 | }, |
356 | }, | |
357 | { | |
358 | .callback = set_bf_sort, | |
739db07f | 359 | .ident = "HP ProLiant DL585 G2", |
c82bc5ad MS |
360 | .matches = { |
361 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
739db07f | 362 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL585 G2"), |
c82bc5ad MS |
363 | }, |
364 | }, | |
8c4b2cf9 BK |
365 | {} |
366 | }; | |
1da177e4 | 367 | |
0df18ff3 YL |
368 | void __init dmi_check_pciprobe(void) |
369 | { | |
370 | dmi_check_system(pciprobe_dmi_table); | |
371 | } | |
372 | ||
1da177e4 LT |
373 | struct pci_bus * __devinit pcibios_scan_root(int busnum) |
374 | { | |
375 | struct pci_bus *bus = NULL; | |
08f1c192 | 376 | struct pci_sysdata *sd; |
1da177e4 LT |
377 | |
378 | while ((bus = pci_find_next_bus(bus)) != NULL) { | |
379 | if (bus->number == busnum) { | |
380 | /* Already scanned */ | |
381 | return bus; | |
382 | } | |
383 | } | |
384 | ||
08f1c192 MBY |
385 | /* Allocate per-root-bus (not per bus) arch-specific data. |
386 | * TODO: leak; this memory is never freed. | |
387 | * It's arguable whether it's worth the trouble to care. | |
388 | */ | |
389 | sd = kzalloc(sizeof(*sd), GFP_KERNEL); | |
390 | if (!sd) { | |
391 | printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum); | |
392 | return NULL; | |
393 | } | |
394 | ||
871d5f8d YL |
395 | sd->node = get_mp_bus_to_node(busnum); |
396 | ||