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> | |
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 | ||
2b290da0 | 23 | static int pci_bf_sort; |
1da177e4 LT |
24 | int pci_routeirq; |
25 | int pcibios_last_bus = -1; | |
120bb424 | 26 | unsigned long pirq_table_addr; |
27 | struct pci_bus *pci_root_bus; | |
1da177e4 | 28 | struct pci_raw_ops *raw_pci_ops; |
b6ce068a MW |
29 | struct pci_raw_ops *raw_pci_ext_ops; |
30 | ||
31 | int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn, | |
32 | int reg, int len, u32 *val) | |
33 | { | |
34 | if (reg < 256 && raw_pci_ops) | |
35 | return raw_pci_ops->read(domain, bus, devfn, reg, len, val); | |
36 | if (raw_pci_ext_ops) | |
37 | return raw_pci_ext_ops->read(domain, bus, devfn, reg, len, val); | |
38 | return -EINVAL; | |
39 | } | |
40 | ||
41 | int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn, | |
42 | int reg, int len, u32 val) | |
43 | { | |
44 | if (reg < 256 && raw_pci_ops) | |
45 | return raw_pci_ops->write(domain, bus, devfn, reg, len, val); | |
46 | if (raw_pci_ext_ops) | |
47 | return raw_pci_ext_ops->write(domain, bus, devfn, reg, len, val); | |
48 | return -EINVAL; | |
49 | } | |
1da177e4 LT |
50 | |
51 | static int pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value) | |
52 | { | |
b6ce068a | 53 | return raw_pci_read(pci_domain_nr(bus), bus->number, |
a79e4198 | 54 | devfn, where, size, value); |
1da177e4 LT |
55 | } |
56 | ||
57 | static int pci_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value) | |
58 | { | |
b6ce068a | 59 | return raw_pci_write(pci_domain_nr(bus), bus->number, |
a79e4198 | 60 | devfn, where, size, value); |
1da177e4 LT |
61 | } |
62 | ||
63 | struct pci_ops pci_root_ops = { | |
64 | .read = pci_read, | |
65 | .write = pci_write, | |
66 | }; | |
67 | ||
68 | /* | |
69 | * legacy, numa, and acpi all want to call pcibios_scan_root | |
70 | * from their initcalls. This flag prevents that. | |
71 | */ | |
72 | int pcibios_scanned; | |
73 | ||
74 | /* | |
75 | * This interrupt-safe spinlock protects all accesses to PCI | |
76 | * configuration space. | |
77 | */ | |
78 | DEFINE_SPINLOCK(pci_config_lock); | |
79 | ||
13a6ddb0 YL |
80 | static int __devinit can_skip_ioresource_align(const struct dmi_system_id *d) |
81 | { | |
82 | pci_probe |= PCI_CAN_SKIP_ISA_ALIGN; | |
83 | printk(KERN_INFO "PCI: %s detected, can skip ISA alignment\n", d->ident); | |
84 | return 0; | |
85 | } | |
86 | ||
87 | static struct dmi_system_id can_skip_pciprobe_dmi_table[] __devinitdata = { | |
88 | /* | |
89 | * Systems where PCI IO resource ISA alignment can be skipped | |
90 | * when the ISA enable bit in the bridge control is not set | |
91 | */ | |
92 | { | |
93 | .callback = can_skip_ioresource_align, | |
94 | .ident = "IBM System x3800", | |
95 | .matches = { | |
96 | DMI_MATCH(DMI_SYS_VENDOR, "IBM"), | |
97 | DMI_MATCH(DMI_PRODUCT_NAME, "x3800"), | |
98 | }, | |
99 | }, | |
100 | { | |
101 | .callback = can_skip_ioresource_align, | |
102 | .ident = "IBM System x3850", | |
103 | .matches = { | |
104 | DMI_MATCH(DMI_SYS_VENDOR, "IBM"), | |
105 | DMI_MATCH(DMI_PRODUCT_NAME, "x3850"), | |
106 | }, | |
107 | }, | |
108 | { | |
109 | .callback = can_skip_ioresource_align, | |
110 | .ident = "IBM System x3950", | |
111 | .matches = { | |
112 | DMI_MATCH(DMI_SYS_VENDOR, "IBM"), | |
113 | DMI_MATCH(DMI_PRODUCT_NAME, "x3950"), | |
114 | }, | |
115 | }, | |
116 | {} | |
117 | }; | |
118 | ||
119 | void __init dmi_check_skip_isa_align(void) | |
120 | { | |
121 | dmi_check_system(can_skip_pciprobe_dmi_table); | |
122 | } | |
123 | ||
1da177e4 LT |
124 | /* |
125 | * Called after each bus is probed, but before its children | |
126 | * are examined. | |
127 | */ | |
128 | ||
129 | void __devinit pcibios_fixup_bus(struct pci_bus *b) | |
130 | { | |
1da177e4 LT |
131 | pci_read_bridge_bases(b); |
132 | } | |
133 | ||
6b4b78fe MD |
134 | /* |
135 | * Only use DMI information to set this if nothing was passed | |
136 | * on the kernel command line (which was parsed earlier). | |
137 | */ | |
138 | ||
1855256c | 139 | static int __devinit set_bf_sort(const struct dmi_system_id *d) |
6b4b78fe MD |
140 | { |
141 | if (pci_bf_sort == pci_bf_sort_default) { | |
142 | pci_bf_sort = pci_dmi_bf; | |
143 | printk(KERN_INFO "PCI: %s detected, enabling pci=bfsort.\n", d->ident); | |
144 | } | |
145 | return 0; | |
146 | } | |
147 | ||
8c4b2cf9 BK |
148 | /* |
149 | * Enable renumbering of PCI bus# ranges to reach all PCI busses (Cardbus) | |
150 | */ | |
151 | #ifdef __i386__ | |
1855256c | 152 | static int __devinit assign_all_busses(const struct dmi_system_id *d) |
8c4b2cf9 BK |
153 | { |
154 | pci_probe |= PCI_ASSIGN_ALL_BUSSES; | |
155 | printk(KERN_INFO "%s detected: enabling PCI bus# renumbering" | |
156 | " (pci=assign-busses)\n", d->ident); | |
157 | return 0; | |
158 | } | |
159 | #endif | |
160 | ||
6b4b78fe MD |
161 | static struct dmi_system_id __devinitdata pciprobe_dmi_table[] = { |
162 | #ifdef __i386__ | |
8c4b2cf9 BK |
163 | /* |
164 | * Laptops which need pci=assign-busses to see Cardbus cards | |
165 | */ | |
8c4b2cf9 BK |
166 | { |
167 | .callback = assign_all_busses, | |
168 | .ident = "Samsung X20 Laptop", | |
169 | .matches = { | |
170 | DMI_MATCH(DMI_SYS_VENDOR, "Samsung Electronics"), | |
171 | DMI_MATCH(DMI_PRODUCT_NAME, "SX20S"), | |
172 | }, | |
173 | }, | |
174 | #endif /* __i386__ */ | |
6b4b78fe MD |
175 | { |
176 | .callback = set_bf_sort, | |
177 | .ident = "Dell PowerEdge 1950", | |
178 | .matches = { | |
179 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
180 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1950"), | |
181 | }, | |
182 | }, | |
183 | { | |
184 | .callback = set_bf_sort, | |
185 | .ident = "Dell PowerEdge 1955", | |
186 | .matches = { | |
187 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
188 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1955"), | |
189 | }, | |
190 | }, | |
191 | { | |
192 | .callback = set_bf_sort, | |
193 | .ident = "Dell PowerEdge 2900", | |
194 | .matches = { | |
195 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
196 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2900"), | |
197 | }, | |
198 | }, | |
199 | { | |
200 | .callback = set_bf_sort, | |
201 | .ident = "Dell PowerEdge 2950", | |
202 | .matches = { | |
203 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
204 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2950"), | |
205 | }, | |
206 | }, | |
f7a9dae7 MD |
207 | { |
208 | .callback = set_bf_sort, | |
209 | .ident = "Dell PowerEdge R900", | |
210 | .matches = { | |
211 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
212 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge R900"), | |
213 | }, | |
214 | }, | |
f52383d3 AG |
215 | { |
216 | .callback = set_bf_sort, | |
217 | .ident = "HP ProLiant BL20p G3", | |
218 | .matches = { | |
219 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
220 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G3"), | |
221 | }, | |
222 | }, | |
223 | { | |
224 | .callback = set_bf_sort, | |
225 | .ident = "HP ProLiant BL20p G4", | |
226 | .matches = { | |
227 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
228 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G4"), | |
229 | }, | |
230 | }, | |
231 | { | |
232 | .callback = set_bf_sort, | |
233 | .ident = "HP ProLiant BL30p G1", | |
234 | .matches = { | |
235 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
236 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL30p G1"), | |
237 | }, | |
238 | }, | |
239 | { | |
240 | .callback = set_bf_sort, | |
241 | .ident = "HP ProLiant BL25p G1", | |
242 | .matches = { | |
243 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
244 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL25p G1"), | |
245 | }, | |
246 | }, | |
247 | { | |
248 | .callback = set_bf_sort, | |
249 | .ident = "HP ProLiant BL35p G1", | |
250 | .matches = { | |
251 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
252 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL35p G1"), | |
253 | }, | |
254 | }, | |
255 | { | |
256 | .callback = set_bf_sort, | |
257 | .ident = "HP ProLiant BL45p G1", | |
258 | .matches = { | |
259 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
260 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G1"), | |
261 | }, | |
262 | }, | |
263 | { | |
264 | .callback = set_bf_sort, | |
265 | .ident = "HP ProLiant BL45p G2", | |
266 | .matches = { | |
267 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
268 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G2"), | |
269 | }, | |
270 | }, | |
271 | { | |
272 | .callback = set_bf_sort, | |
273 | .ident = "HP ProLiant BL460c G1", | |
274 | .matches = { | |
275 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
276 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL460c G1"), | |
277 | }, | |
278 | }, | |
279 | { | |
280 | .callback = set_bf_sort, | |
281 | .ident = "HP ProLiant BL465c G1", | |
282 | .matches = { | |
283 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
284 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL465c G1"), | |
285 | }, | |
286 | }, | |
287 | { | |
288 | .callback = set_bf_sort, | |
289 | .ident = "HP ProLiant BL480c G1", | |
290 | .matches = { | |
291 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
292 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL480c G1"), | |
293 | }, | |
294 | }, | |
295 | { | |
296 | .callback = set_bf_sort, | |
297 | .ident = "HP ProLiant BL685c G1", | |
298 | .matches = { | |
299 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
300 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL685c G1"), | |
301 | }, | |
302 | }, | |
8f8ae1a7 MS |
303 | { |
304 | .callback = set_bf_sort, | |
8d64c781 | 305 | .ident = "HP ProLiant DL360", |
8f8ae1a7 MS |
306 | .matches = { |
307 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
8d64c781 | 308 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL360"), |
8f8ae1a7 MS |
309 | }, |
310 | }, | |
311 | { | |
312 | .callback = set_bf_sort, | |
8d64c781 | 313 | .ident = "HP ProLiant DL380", |
8f8ae1a7 MS |
314 | .matches = { |
315 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
8d64c781 | 316 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL380"), |
8f8ae1a7 MS |
317 | }, |
318 | }, | |
5b1ea82f JL |
319 | #ifdef __i386__ |
320 | { | |
321 | .callback = assign_all_busses, | |
322 | .ident = "Compaq EVO N800c", | |
323 | .matches = { | |
324 | DMI_MATCH(DMI_SYS_VENDOR, "Compaq"), | |
325 | DMI_MATCH(DMI_PRODUCT_NAME, "EVO N800c"), | |
326 | }, | |
327 | }, | |
328 | #endif | |
c82bc5ad MS |
329 | { |
330 | .callback = set_bf_sort, | |
a1676072 | 331 | .ident = "HP ProLiant DL360", |
c82bc5ad MS |
332 | .matches = { |
333 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
a1676072 | 334 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL360"), |
c82bc5ad MS |
335 | }, |
336 | }, | |
337 | { | |
338 | .callback = set_bf_sort, | |
a1676072 | 339 | .ident = "HP ProLiant DL380", |
c82bc5ad MS |
340 | .matches = { |
341 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
a1676072 | 342 | DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL380"), |
c82bc5ad MS |
343 | }, |
344 | }, | |
8c4b2cf9 BK |
345 | {} |
346 | }; | |
1da177e4 | 347 | |
0df18ff3 YL |
348 | void __init dmi_check_pciprobe(void) |
349 | { | |
350 | dmi_check_system(pciprobe_dmi_table); | |
351 | } | |
352 | ||
1da177e4 LT |
353 | struct pci_bus * __devinit pcibios_scan_root(int busnum) |
354 | { | |
355 | struct pci_bus *bus = NULL; | |
08f1c192 | 356 | struct pci_sysdata *sd; |
1da177e4 LT |
357 | |
358 | while ((bus = pci_find_next_bus(bus)) != NULL) { | |
359 | if (bus->number == busnum) { | |
360 | /* Already scanned */ | |
361 | return bus; | |
362 | } | |
363 | } | |
364 | ||
08f1c192 MBY |
365 | /* Allocate per-root-bus (not per bus) arch-specific data. |
366 | * TODO: leak; this memory is never freed. | |
367 | * It's arguable whether it's worth the trouble to care. | |
368 | */ | |
369 | sd = kzalloc(sizeof(*sd), GFP_KERNEL); | |
370 | if (!sd) { | |
371 | printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum); | |
372 | return NULL; | |
373 | } | |
374 | ||
871d5f8d YL |
375 | sd->node = get_mp_bus_to_node(busnum); |
376 |