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1da177e4 LT |
1 | /* |
2 | * Port for PPC64 David Engebretsen, IBM Corp. | |
3 | * Contains common pci routines for ppc64 platform, pSeries and iSeries brands. | |
4 | * | |
5 | * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM | |
6 | * Rework, based on alpha PCI code. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #undef DEBUG | |
15 | ||
1da177e4 LT |
16 | #include <linux/kernel.h> |
17 | #include <linux/pci.h> | |
18 | #include <linux/string.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/bootmem.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/list.h> | |
b2ad7b5e | 23 | #include <linux/syscalls.h> |
6e99e458 | 24 | #include <linux/irq.h> |
3d5134ee | 25 | #include <linux/vmalloc.h> |
1da177e4 LT |
26 | |
27 | #include <asm/processor.h> | |
28 | #include <asm/io.h> | |
29 | #include <asm/prom.h> | |
30 | #include <asm/pci-bridge.h> | |
31 | #include <asm/byteorder.h> | |
1da177e4 | 32 | #include <asm/machdep.h> |
d387899f | 33 | #include <asm/ppc-pci.h> |
1da177e4 | 34 | |
1da177e4 | 35 | unsigned long pci_probe_only = 1; |
1da177e4 | 36 | |
1da177e4 LT |
37 | /* pci_io_base -- the base address from which io bars are offsets. |
38 | * This is the lowest I/O base address (so bar values are always positive), | |
39 | * and it *must* be the start of ISA space if an ISA bus exists because | |
3d5134ee BH |
40 | * ISA drivers use hard coded offsets. If no ISA bus exists nothing |
41 | * is mapped on the first 64K of IO space | |
1da177e4 | 42 | */ |
3d5134ee | 43 | unsigned long pci_io_base = ISA_IO_BASE; |
1da177e4 LT |
44 | EXPORT_SYMBOL(pci_io_base); |
45 | ||
4267292b PM |
46 | static u32 get_int_prop(struct device_node *np, const char *name, u32 def) |
47 | { | |
a7f67bdf | 48 | const u32 *prop; |
4267292b PM |
49 | int len; |
50 | ||
e2eb6392 | 51 | prop = of_get_property(np, name, &len); |
4267292b PM |
52 | if (prop && len >= 4) |
53 | return *prop; | |
54 | return def; | |
55 | } | |
56 | ||
ad892a63 | 57 | static unsigned int pci_parse_of_flags(u32 addr0, int bridge) |
4267292b PM |
58 | { |
59 | unsigned int flags = 0; | |
60 | ||
61 | if (addr0 & 0x02000000) { | |
d79e743e PM |
62 | flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY; |
63 | flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64; | |
64 | flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M; | |
4267292b | 65 | if (addr0 & 0x40000000) |
d79e743e PM |
66 | flags |= IORESOURCE_PREFETCH |
67 | | PCI_BASE_ADDRESS_MEM_PREFETCH; | |
ad892a63 BH |
68 | /* Note: We don't know whether the ROM has been left enabled |
69 | * by the firmware or not. We mark it as disabled (ie, we do | |
70 | * not set the IORESOURCE_ROM_ENABLE flag) for now rather than | |
71 | * do a config space read, it will be force-enabled if needed | |
72 | */ | |
73 | if (!bridge && (addr0 & 0xff) == 0x30) | |
74 | flags |= IORESOURCE_READONLY; | |
4267292b | 75 | } else if (addr0 & 0x01000000) |
d79e743e | 76 | flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO; |
ad892a63 BH |
77 | if (flags) |
78 | flags |= IORESOURCE_SIZEALIGN; | |
4267292b PM |
79 | return flags; |
80 | } | |
81 | ||
4267292b PM |
82 | |
83 | static void pci_parse_of_addrs(struct device_node *node, struct pci_dev *dev) | |
84 | { | |
85 | u64 base, size; | |
86 | unsigned int flags; | |
87 | struct resource *res; | |
a7f67bdf JK |
88 | const u32 *addrs; |
89 | u32 i; | |
4267292b PM |
90 | int proplen; |
91 | ||
e2eb6392 | 92 | addrs = of_get_property(node, "assigned-addresses", &proplen); |
4267292b PM |
93 | if (!addrs) |
94 | return; | |
b0494bc8 | 95 | pr_debug(" parse addresses (%d bytes) @ %p\n", proplen, addrs); |
4267292b | 96 | for (; proplen >= 20; proplen -= 20, addrs += 5) { |
ad892a63 | 97 | flags = pci_parse_of_flags(addrs[0], 0); |
4267292b PM |
98 | if (!flags) |
99 | continue; | |
327e22df JL |
100 | base = of_read_number(&addrs[1], 2); |
101 | size = of_read_number(&addrs[3], 2); | |
4267292b PM |
102 | if (!size) |
103 | continue; | |
104 | i = addrs[0] & 0xff; | |
b0494bc8 BH |
105 | pr_debug(" base: %llx, size: %llx, i: %x\n", |
106 | (unsigned long long)base, | |
107 | (unsigned long long)size, i); | |
1beb6a7d | 108 | |
4267292b PM |
109 | if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) { |
110 | res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2]; | |
111 | } else if (i == dev->rom_base_reg) { | |
112 | res = &dev->resource[PCI_ROM_RESOURCE]; | |
113 | flags |= IORESOURCE_READONLY | IORESOURCE_CACHEABLE; | |
114 | } else { | |
115 | printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i); | |
116 | continue; | |
117 | } | |
118 | res->start = base; | |
119 | res->end = base + size - 1; | |
120 | res->flags = flags; | |
121 | res->name = pci_name(dev); | |
4267292b PM |
122 | } |
123 | } | |
124 | ||
ead83717 JR |
125 | struct pci_dev *of_create_pci_dev(struct device_node *node, |
126 | struct pci_bus *bus, int devfn) | |
4267292b PM |
127 | { |
128 | struct pci_dev *dev; | |
129 | const char *type; | |
130 | ||
bab41e9b | 131 | dev = alloc_pci_dev(); |
4267292b PM |
132 | if (!dev) |
133 | return NULL; | |
e2eb6392 | 134 | type = of_get_property(node, "device_type", NULL); |
4267292b PM |
135 | if (type == NULL) |
136 | type = ""; | |
137 | ||
b0494bc8 | 138 | pr_debug(" create device, devfn: %x, type: %s\n", devfn, type); |
1beb6a7d | 139 | |
4267292b PM |
140 | dev->bus = bus; |
141 | dev->sysdata = node; | |
142 | dev->dev.parent = bus->bridge; | |
143 | dev->dev.bus = &pci_bus_type; | |
144 | dev->devfn = devfn; | |
145 | dev->multifunction = 0; /* maybe a lie? */ | |
146 | ||
147 | dev->vendor = get_int_prop(node, "vendor-id", 0xffff); | |
148 | dev->device = get_int_prop(node, "device-id", 0xffff); | |
149 | dev->subsystem_vendor = get_int_prop(node, "subsystem-vendor-id", 0); | |
150 | dev->subsystem_device = get_int_prop(node, "subsystem-id", 0); | |
151 | ||
9d17a5c6 | 152 | dev->cfg_size = pci_cfg_space_size(dev); |
4267292b | 153 | |
420b5eea | 154 | dev_set_name(&dev->dev, "%04x:%02x:%02x.%d", pci_domain_nr(bus), |
4267292b PM |
155 | dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn)); |
156 | dev->class = get_int_prop(node, "class-code", 0); | |
b8a3a521 | 157 | dev->revision = get_int_prop(node, "revision-id", 0); |
4267292b | 158 | |
b0494bc8 BH |
159 | pr_debug(" class: 0x%x\n", dev->class); |
160 | pr_debug(" revision: 0x%x\n", dev->revision); | |
1beb6a7d | 161 | |
4267292b | 162 | dev->current_state = 4; /* unknown power state */ |
bb63ab13 | 163 | dev->error_state = pci_channel_io_normal; |
8f2ea1fd | 164 | dev->dma_mask = 0xffffffff; |
4267292b | 165 | |
bb53bb3d | 166 | if (!strcmp(type, "pci") || !strcmp(type, "pciex")) { |
4267292b PM |
167 | /* a PCI-PCI bridge */ |
168 | dev->hdr_type = PCI_HEADER_TYPE_BRIDGE; | |
169 | dev->rom_base_reg = PCI_ROM_ADDRESS1; | |
170 | } else if (!strcmp(type, "cardbus")) { | |
171 | dev->hdr_type = PCI_HEADER_TYPE_CARDBUS; | |
172 | } else { | |
173 | dev->hdr_type = PCI_HEADER_TYPE_NORMAL; | |
174 | dev->rom_base_reg = PCI_ROM_ADDRESS; | |
0ebfff14 | 175 | /* Maybe do a default OF mapping here */ |
4267292b | 176 | dev->irq = NO_IRQ; |
4267292b PM |
177 | } |
178 | ||
179 | pci_parse_of_addrs(node, dev); | |
180 | ||
b0494bc8 | 181 | pr_debug(" adding to system ...\n"); |
1beb6a7d | 182 | |
4267292b PM |
183 | pci_device_add(dev, bus); |
184 | ||
4267292b PM |
185 | return dev; |
186 | } | |
ead83717 | 187 | EXPORT_SYMBOL(of_create_pci_dev); |
4267292b | 188 | |
8b8da358 BH |
189 | static void __devinit __of_scan_bus(struct device_node *node, |
190 | struct pci_bus *bus, int rescan_existing) | |
4267292b | 191 | { |
85e99b9f | 192 | struct device_node *child; |
a7f67bdf | 193 | const u32 *reg; |
4267292b PM |
194 | int reglen, devfn; |
195 | struct pci_dev *dev; | |
196 | ||
b0494bc8 BH |
197 | pr_debug("of_scan_bus(%s) bus no %d... \n", |
198 | node->full_name, bus->number); | |
1beb6a7d | 199 | |
bf5e2ba2 | 200 | /* Scan direct children */ |
85e99b9f | 201 | for_each_child_of_node(node, child) { |
b0494bc8 | 202 | pr_debug(" * %s\n", child->full_name); |
e2eb6392 | 203 | reg = of_get_property(child, "reg", ®len); |
4267292b PM |
204 | if (reg == NULL || reglen < 20) |
205 | continue; | |
206 | devfn = (reg[0] >> 8) & 0xff; | |
1beb6a7d | 207 | |
4267292b PM |
208 | /* create a new pci_dev for this device */ |
209 | dev = of_create_pci_dev(child, bus, devfn); | |
210 | if (!dev) | |
211 | continue; | |
b0494bc8 | 212 | pr_debug(" dev header type: %x\n", dev->hdr_type); |
bf5e2ba2 BH |
213 | } |
214 | ||
8b8da358 BH |
215 | /* Apply all fixups necessary. We don't fixup the bus "self" |
216 | * for an existing bridge that is being rescanned | |
217 | */ | |
218 | if (!rescan_existing) | |
219 | pcibios_setup_bus_self(bus); | |
220 | pcibios_setup_bus_devices(bus); | |
1beb6a7d | 221 | |
bf5e2ba2 BH |
222 | /* Now scan child busses */ |
223 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
4267292b | 224 | if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || |
bf5e2ba2 BH |
225 | dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { |
226 | struct device_node *child = pci_device_to_OF_node(dev); | |
227 | if (dev) | |
228 | of_scan_pci_bridge(child, dev); | |
229 | } | |
4267292b | 230 | } |
4267292b | 231 | } |
8b8da358 BH |
232 | |
233 | void __devinit of_scan_bus(struct device_node *node, | |
234 | struct pci_bus *bus) | |
235 | { | |
236 | __of_scan_bus(node, bus, 0); | |
237 | } | |
238 | EXPORT_SYMBOL_GPL(of_scan_bus); | |
239 | ||
240 | void __devinit of_rescan_bus(struct device_node *node, | |
241 | struct pci_bus *bus) | |
242 | { | |
243 | __of_scan_bus(node, bus, 1); | |
244 | } | |
245 | EXPORT_SYMBOL_GPL(of_rescan_bus); | |
4267292b | 246 | |
ead83717 | 247 | void __devinit of_scan_pci_bridge(struct device_node *node, |
bf5e2ba2 | 248 | struct pci_dev *dev) |
4267292b PM |
249 | { |
250 | struct pci_bus *bus; | |
a7f67bdf | 251 | const u32 *busrange, *ranges; |
4267292b PM |
252 | int len, i, mode; |
253 | struct resource *res; | |
254 | unsigned int flags; | |
255 | u64 size; | |
256 | ||
b0494bc8 | 257 | pr_debug("of_scan_pci_bridge(%s)\n", node->full_name); |
1beb6a7d | 258 | |
4267292b | 259 | /* parse bus-range property */ |
e2eb6392 | 260 | busrange = of_get_property(node, "bus-range", &len); |
4267292b | 261 | if (busrange == NULL || len != 8) { |
1beb6a7d | 262 | printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n", |
4267292b PM |
263 | node->full_name); |
264 | return; | |
265 | } | |
e2eb6392 | 266 | ranges = of_get_property(node, "ranges", &len); |
4267292b | 267 | if (ranges == NULL) { |
1beb6a7d | 268 | printk(KERN_DEBUG "Can't get ranges for PCI-PCI bridge %s\n", |
4267292b PM |
269 | node->full_name); |
270 | return; | |
271 | } | |
272 | ||
273 | bus = pci_add_new_bus(dev->bus, dev, busrange[0]); | |
274 | if (!bus) { | |
275 | printk(KERN_ERR "Failed to create pci bus for %s\n", | |
276 | node->full_name); | |
277 | return; | |
278 | } | |
279 | ||
280 | bus->primary = dev->bus->number; | |
281 | bus->subordinate = busrange[1]; | |
282 | bus->bridge_ctl = 0; | |
283 | bus->sysdata = node; | |
284 | ||
285 | /* parse ranges property */ | |
286 | /* PCI #address-cells == 3 and #size-cells == 2 always */ | |
287 | res = &dev->resource[PCI_BRIDGE_RESOURCES]; | |
288 | for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) { | |
289 | res->flags = 0; | |
290 | bus->resource[i] = res; | |
291 | ++res; | |
292 | } | |
293 | i = 1; | |
294 | for (; len >= 32; len -= 32, ranges += 8) { | |
ad892a63 | 295 | flags = pci_parse_of_flags(ranges[0], 1); |
327e22df | 296 | size = of_read_number(&ranges[6], 2); |
4267292b PM |
297 | if (flags == 0 || size == 0) |
298 | continue; | |
299 | if (flags & IORESOURCE_IO) { | |
300 | res = bus->resource[0]; | |
301 | if (res->flags) { | |
302 | printk(KERN_ERR "PCI: ignoring extra I/O range" | |
303 | " for bridge %s\n", node->full_name); | |
304 | continue; | |
305 | } | |
306 | } else { | |
307 | if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) { | |
308 | printk(KERN_ERR "PCI: too many memory ranges" | |
309 | " for bridge %s\n", node->full_name); | |
310 | continue; | |
311 | } | |
312 | res = bus->resource[i]; | |
313 | ++i; | |
314 | } | |
327e22df | 315 | res->start = of_read_number(&ranges[1], 2); |
4267292b PM |
316 | res->end = res->start + size - 1; |
317 | res->flags = flags; | |
4267292b PM |
318 | } |
319 | sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus), | |
320 | bus->number); | |
b0494bc8 | 321 | pr_debug(" bus name: %s\n", bus->name); |
4267292b PM |
322 | |
323 | mode = PCI_PROBE_NORMAL; | |
324 | if (ppc_md.pci_probe_mode) | |
325 | mode = ppc_md.pci_probe_mode(bus); | |
b0494bc8 | 326 | pr_debug(" probe mode: %d\n", mode); |
1beb6a7d | 327 | |
4267292b PM |
328 | if (mode == PCI_PROBE_DEVTREE) |
329 | of_scan_bus(node, bus); | |
330 | else if (mode == PCI_PROBE_NORMAL) | |
331 | pci_scan_child_bus(bus); | |
332 | } | |
ead83717 | 333 | EXPORT_SYMBOL(of_scan_pci_bridge); |
4267292b | 334 | |
ead83717 | 335 | void __devinit scan_phb(struct pci_controller *hose) |
4267292b PM |
336 | { |
337 | struct pci_bus *bus; | |
44ef3390 | 338 | struct device_node *node = hose->dn; |
53280323 | 339 | int mode; |
4267292b | 340 | |
b0494bc8 BH |
341 | pr_debug("PCI: Scanning PHB %s\n", |
342 | node ? node->full_name : "<NO NAME>"); | |
1beb6a7d | 343 | |
3fd94c6b | 344 | /* Create an empty bus for the toplevel */ |
803d4573 | 345 | bus = pci_create_bus(hose->parent, hose->first_busno, hose->ops, node); |
4267292b PM |
346 | if (bus == NULL) { |
347 | printk(KERN_ERR "Failed to create bus for PCI domain %04x\n", | |
348 | hose->global_number); | |
349 | return; | |
350 | } | |
351 | bus->secondary = hose->first_busno; | |
352 | hose->bus = bus; | |
353 | ||
3fd94c6b | 354 | /* Get some IO space for the new PHB */ |
9ccc4fd2 | 355 | pcibios_map_io_space(bus); |
3d5134ee | 356 | |
3fd94c6b | 357 | /* Wire up PHB bus resources */ |
53280323 | 358 | pcibios_setup_phb_resources(hose); |
4267292b | 359 | |
3fd94c6b | 360 | /* Get probe mode and perform scan */ |
4267292b | 361 | mode = PCI_PROBE_NORMAL; |
1beb6a7d | 362 | if (node && ppc_md.pci_probe_mode) |
4267292b | 363 | mode = ppc_md.pci_probe_mode(bus); |
b0494bc8 | 364 | pr_debug(" probe mode: %d\n", mode); |
4267292b PM |
365 | if (mode == PCI_PROBE_DEVTREE) { |
366 | bus->subordinate = hose->last_busno; | |
367 | of_scan_bus(node, bus); | |
368 | } | |
99a565ba | 369 | |
4267292b PM |
370 | if (mode == PCI_PROBE_NORMAL) |
371 | hose->last_busno = bus->subordinate = pci_scan_child_bus(bus); | |
4267292b PM |
372 | } |
373 | ||
1da177e4 LT |
374 | static int __init pcibios_init(void) |
375 | { | |
376 | struct pci_controller *hose, *tmp; | |
1da177e4 | 377 | |
3fd94c6b BH |
378 | printk(KERN_INFO "PCI: Probing PCI hardware\n"); |
379 | ||
53280323 | 380 | /* For now, override phys_mem_access_prot. If we need it,g |
1da177e4 LT |
381 | * later, we may move that initialization to each ppc_md |
382 | */ | |
383 | ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot; | |
384 | ||
3fd94c6b BH |
385 | if (pci_probe_only) |
386 | ppc_pci_flags |= PPC_PCI_PROBE_ONLY; | |
1da177e4 | 387 | |
1fd0f525 BH |
388 | /* On ppc64, we always enable PCI domains and we keep domain 0 |
389 | * backward compatible in /proc for video cards | |
390 | */ | |
391 | ppc_pci_flags |= PPC_PCI_ENABLE_PROC_DOMAINS | PPC_PCI_COMPAT_DOMAIN_0; | |
392 | ||
1da177e4 | 393 | /* Scan all of the recorded PCI controllers. */ |
92eb4602 | 394 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { |
4267292b | 395 | scan_phb(hose); |
92eb4602 JR |
396 | pci_bus_add_devices(hose->bus); |
397 | } | |
1da177e4 | 398 | |
3fd94c6b BH |
399 | /* Call common code to handle resource allocation */ |
400 | pcibios_resource_survey(); | |
1da177e4 | 401 | |
e884e9c5 | 402 | printk(KERN_DEBUG "PCI: Probing PCI hardware done\n"); |
1da177e4 LT |
403 | |
404 | return 0; | |
405 | } | |
406 | ||
407 | subsys_initcall(pcibios_init); | |
408 | ||
3d5134ee BH |
409 | #ifdef CONFIG_HOTPLUG |
410 | ||
411 | int pcibios_unmap_io_space(struct pci_bus *bus) | |
1da177e4 | 412 | { |
3d5134ee | 413 | struct pci_controller *hose; |
1da177e4 | 414 | |
3d5134ee | 415 | WARN_ON(bus == NULL); |
de821204 | 416 | |
3d5134ee BH |
417 | /* If this is not a PHB, we only flush the hash table over |
418 | * the area mapped by this bridge. We don't play with the PTE | |
419 | * mappings since we might have to deal with sub-page alignemnts | |
420 | * so flushing the hash table is the only sane way to make sure | |
421 | * that no hash entries are covering that removed bridge area | |
422 | * while still allowing other busses overlapping those pages | |
94491685 BH |
423 | * |
424 | * Note: If we ever support P2P hotplug on Book3E, we'll have | |
425 | * to do an appropriate TLB flush here too | |
3d5134ee BH |
426 | */ |
427 | if (bus->self) { | |
428 | struct resource *res = bus->resource[0]; | |
1da177e4 | 429 | |
b0494bc8 BH |
430 | pr_debug("IO unmapping for PCI-PCI bridge %s\n", |
431 | pci_name(bus->self)); | |
de821204 | 432 | |
94491685 | 433 | #ifdef CONFIG_PPC_STD_MMU_64 |
3d5134ee | 434 | __flush_hash_table_range(&init_mm, res->start + _IO_BASE, |
b30115ea | 435 | res->end + _IO_BASE + 1); |
94491685 | 436 | #endif |
3d5134ee BH |
437 | return 0; |
438 | } | |
1da177e4 | 439 | |
3d5134ee BH |
440 | /* Get the host bridge */ |
441 | hose = pci_bus_to_host(bus); | |
1da177e4 | 442 | |
3d5134ee BH |
443 | /* Check if we have IOs allocated */ |
444 | if (hose->io_base_alloc == 0) | |
445 | return 0; | |
de821204 | 446 | |
b0494bc8 BH |
447 | pr_debug("IO unmapping for PHB %s\n", hose->dn->full_name); |
448 | pr_debug(" alloc=0x%p\n", hose->io_base_alloc); | |
1da177e4 | 449 | |
3d5134ee BH |
450 | /* This is a PHB, we fully unmap the IO area */ |
451 | vunmap(hose->io_base_alloc); | |
1da177e4 | 452 | |
3d5134ee | 453 | return 0; |
1da177e4 | 454 | } |
3d5134ee | 455 | EXPORT_SYMBOL_GPL(pcibios_unmap_io_space); |
1da177e4 | 456 | |
3d5134ee | 457 | #endif /* CONFIG_HOTPLUG */ |
1da177e4 | 458 | |
3d5134ee | 459 | int __devinit pcibios_map_io_space(struct pci_bus *bus) |
1da177e4 | 460 | { |
3d5134ee BH |
461 | struct vm_struct *area; |
462 | unsigned long phys_page; | |
463 | unsigned long size_page; | |
464 | unsigned long io_virt_offset; | |
465 | struct pci_controller *hose; | |
de821204 | 466 | |
3d5134ee | 467 | WARN_ON(bus == NULL); |
31e92e0a | 468 | |
3d5134ee BH |
469 | /* If this not a PHB, nothing to do, page tables still exist and |
470 | * thus HPTEs will be faulted in when needed | |
471 | */ | |
472 | if (bus->self) { | |
b0494bc8 BH |
473 | pr_debug("IO mapping for PCI-PCI bridge %s\n", |
474 | pci_name(bus->self)); | |
9477e455 | 475 | pr_debug(" virt=0x%016llx...0x%016llx\n", |
b0494bc8 BH |
476 | bus->resource[0]->start + _IO_BASE, |
477 | bus->resource[0]->end + _IO_BASE); | |
3d5134ee | 478 | return 0; |
1da177e4 LT |
479 | } |
480 | ||
3d5134ee BH |
481 | /* Get the host bridge */ |
482 | hose = pci_bus_to_host(bus); | |
483 | phys_page = _ALIGN_DOWN(hose->io_base_phys, PAGE_SIZE); | |
484 | size_page = _ALIGN_UP(hose->pci_io_size, PAGE_SIZE); | |
1da177e4 | 485 | |
3d5134ee BH |
486 | /* Make sure IO area address is clear */ |
487 | hose->io_base_alloc = NULL; | |
1da177e4 | 488 | |
3d5134ee BH |
489 | /* If there's no IO to map on that bus, get away too */ |
490 | if (hose->pci_io_size == 0 || hose->io_base_phys == 0) | |
491 | return 0; | |
1da177e4 | 492 | |
3d5134ee BH |
493 | /* Let's allocate some IO space for that guy. We don't pass |
494 | * VM_IOREMAP because we don't care about alignment tricks that | |
495 | * the core does in that case. Maybe we should due to stupid card | |
496 | * with incomplete address decoding but I'd rather not deal with | |
497 | * those outside of the reserved 64K legacy region. | |
498 | */ | |
499 | area = __get_vm_area(size_page, 0, PHB_IO_BASE, PHB_IO_END); | |
500 | if (area == NULL) | |
501 | return -ENOMEM; | |
502 | hose->io_base_alloc = area->addr; | |
503 | hose->io_base_virt = (void __iomem *)(area->addr + | |
504 | hose->io_base_phys - phys_page); | |
505 | ||
b0494bc8 | 506 | pr_debug("IO mapping for PHB %s\n", hose->dn->full_name); |
9477e455 | 507 | pr_debug(" phys=0x%016llx, virt=0x%p (alloc=0x%p)\n", |
b0494bc8 BH |
508 | hose->io_base_phys, hose->io_base_virt, hose->io_base_alloc); |
509 | pr_debug(" size=0x%016lx (alloc=0x%016lx)\n", | |
510 | hose->pci_io_size, size_page); | |
3d5134ee BH |
511 | |
512 | /* Establish the mapping */ | |
513 | if (__ioremap_at(phys_page, area->addr, size_page, | |
514 | _PAGE_NO_CACHE | _PAGE_GUARDED) == NULL) | |
515 | return -ENOMEM; | |
516 | ||
517 | /* Fixup hose IO resource */ | |
518 | io_virt_offset = (unsigned long)hose->io_base_virt - _IO_BASE; | |
519 | hose->io_resource.start += io_virt_offset; | |
520 | hose->io_resource.end += io_virt_offset; | |
521 | ||
9477e455 | 522 | pr_debug(" hose->io_resource=0x%016llx...0x%016llx\n", |
b0494bc8 | 523 | hose->io_resource.start, hose->io_resource.end); |
1da177e4 LT |
524 | |
525 | return 0; | |
526 | } | |
3d5134ee | 527 | EXPORT_SYMBOL_GPL(pcibios_map_io_space); |
1da177e4 | 528 | |
b2ad7b5e PM |
529 | #define IOBASE_BRIDGE_NUMBER 0 |
530 | #define IOBASE_MEMORY 1 | |
531 | #define IOBASE_IO 2 | |
532 | #define IOBASE_ISA_IO 3 | |
533 | #define IOBASE_ISA_MEM 4 | |
534 | ||
535 | long sys_pciconfig_iobase(long which, unsigned long in_bus, | |
536 | unsigned long in_devfn) | |
537 | { | |
538 | struct pci_controller* hose; | |
539 | struct list_head *ln; | |
540 | struct pci_bus *bus = NULL; | |
541 | struct device_node *hose_node; | |
542 | ||
543 | /* Argh ! Please forgive me for that hack, but that's the | |
544 | * simplest way to get existing XFree to not lockup on some | |
545 | * G5 machines... So when something asks for bus 0 io base | |
546 | * (bus 0 is HT root), we return the AGP one instead. | |
547 | */ | |
16124f10 PM |
548 | if (in_bus == 0 && machine_is_compatible("MacRISC4")) { |
549 | struct device_node *agp; | |
550 | ||
551 | agp = of_find_compatible_node(NULL, NULL, "u3-agp"); | |
552 | if (agp) | |
b2ad7b5e | 553 | in_bus = 0xf0; |
16124f10 PM |
554 | of_node_put(agp); |
555 | } | |
b2ad7b5e PM |
556 | |
557 | /* That syscall isn't quite compatible with PCI domains, but it's | |
558 | * used on pre-domains setup. We return the first match | |
559 | */ | |
560 | ||
561 | for (ln = pci_root_buses.next; ln != &pci_root_buses; ln = ln->next) { | |
562 | bus = pci_bus_b(ln); | |
545da94f | 563 | if (in_bus >= bus->number && in_bus <= bus->subordinate) |
b2ad7b5e PM |
564 | break; |
565 | bus = NULL; | |
566 | } | |
567 | if (bus == NULL || bus->sysdata == NULL) | |
568 | return -ENODEV; | |
569 | ||
570 | hose_node = (struct device_node *)bus->sysdata; | |
571 | hose = PCI_DN(hose_node)->phb; | |
572 | ||
573 | switch (which) { | |
574 | case IOBASE_BRIDGE_NUMBER: | |
575 | return (long)hose->first_busno; | |
576 | case IOBASE_MEMORY: | |
577 | return (long)hose->pci_mem_offset; | |
578 | case IOBASE_IO: | |
579 | return (long)hose->io_base_phys; | |
580 | case IOBASE_ISA_IO: | |
581 | return (long)isa_io_base; | |
582 | case IOBASE_ISA_MEM: | |
583 | return -EINVAL; | |
584 | } | |
585 | ||
586 | return -EOPNOTSUPP; | |
587 | } | |
357518fa AB |
588 | |
589 | #ifdef CONFIG_NUMA | |
590 | int pcibus_to_node(struct pci_bus *bus) | |
591 | { | |
592 | struct pci_controller *phb = pci_bus_to_host(bus); | |
593 | return phb->node; | |
594 | } | |
595 | EXPORT_SYMBOL(pcibus_to_node); | |
596 | #endif |