Commit | Line | Data |
---|---|---|
e05b3b4a PM |
1 | /* |
2 | * Common pmac/prep/chrp pci routines. -- Cort | |
3 | */ | |
4 | ||
e05b3b4a PM |
5 | #include <linux/kernel.h> |
6 | #include <linux/pci.h> | |
7 | #include <linux/delay.h> | |
8 | #include <linux/string.h> | |
9 | #include <linux/init.h> | |
10 | #include <linux/capability.h> | |
11 | #include <linux/sched.h> | |
12 | #include <linux/errno.h> | |
13 | #include <linux/bootmem.h> | |
6e99e458 | 14 | #include <linux/irq.h> |
f90bb153 | 15 | #include <linux/list.h> |
66524b22 | 16 | #include <linux/of.h> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
e05b3b4a PM |
18 | |
19 | #include <asm/processor.h> | |
20 | #include <asm/io.h> | |
21 | #include <asm/prom.h> | |
22 | #include <asm/sections.h> | |
23 | #include <asm/pci-bridge.h> | |
c3bd517d | 24 | #include <asm/ppc-pci.h> |
e05b3b4a | 25 | #include <asm/byteorder.h> |
e05b3b4a PM |
26 | #include <asm/uaccess.h> |
27 | #include <asm/machdep.h> | |
28 | ||
29 | #undef DEBUG | |
30 | ||
e05b3b4a | 31 | unsigned long isa_io_base = 0; |
e05b3b4a PM |
32 | unsigned long pci_dram_offset = 0; |
33 | int pcibios_assign_bus_offset = 1; | |
34 | ||
35 | void pcibios_make_OF_bus_map(void); | |
36 | ||
e05b3b4a | 37 | static void fixup_cpc710_pci64(struct pci_dev* dev); |
e05b3b4a | 38 | static u8* pci_to_OF_bus_map; |
e05b3b4a PM |
39 | |
40 | /* By default, we don't re-assign bus numbers. We do this only on | |
41 | * some pmacs | |
42 | */ | |
fc3fb71c | 43 | static int pci_assign_all_buses; |
e05b3b4a | 44 | |
e05b3b4a PM |
45 | static int pci_bus_count; |
46 | ||
7b6b574c BH |
47 | /* This will remain NULL for now, until isa-bridge.c is made common |
48 | * to both 32-bit and 64-bit. | |
49 | */ | |
50 | struct pci_dev *isa_bridge_pcidev; | |
51 | EXPORT_SYMBOL_GPL(isa_bridge_pcidev); | |
52 | ||
2052d6d2 | 53 | static void |
4a015c37 | 54 | fixup_hide_host_resource_fsl(struct pci_dev *dev) |
2052d6d2 KG |
55 | { |
56 | int i, class = dev->class >> 8; | |
57 | ||
4a015c37 JR |
58 | if ((class == PCI_CLASS_PROCESSOR_POWERPC || |
59 | class == PCI_CLASS_BRIDGE_OTHER) && | |
2052d6d2 KG |
60 | (dev->hdr_type == PCI_HEADER_TYPE_NORMAL) && |
61 | (dev->bus->parent == NULL)) { | |
62 | for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { | |
63 | dev->resource[i].start = 0; | |
64 | dev->resource[i].end = 0; | |
65 | dev->resource[i].flags = 0; | |
66 | } | |
67 | } | |
68 | } | |
69 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MOTOROLA, PCI_ANY_ID, fixup_hide_host_resource_fsl); | |
70 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID, fixup_hide_host_resource_fsl); | |
71 | ||
e05b3b4a PM |
72 | static void |
73 | fixup_cpc710_pci64(struct pci_dev* dev) | |
74 | { | |
75 | /* Hide the PCI64 BARs from the kernel as their content doesn't | |
76 | * fit well in the resource management | |
77 | */ | |
78 | dev->resource[0].start = dev->resource[0].end = 0; | |
79 | dev->resource[0].flags = 0; | |
80 | dev->resource[1].start = dev->resource[1].end = 0; | |
81 | dev->resource[1].flags = 0; | |
82 | } | |
83 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CPC710_PCI64, fixup_cpc710_pci64); | |
84 | ||
e05b3b4a PM |
85 | /* |
86 | * Functions below are used on OpenFirmware machines. | |
87 | */ | |
88 | static void | |
89 | make_one_node_map(struct device_node* node, u8 pci_bus) | |
90 | { | |
a7f67bdf | 91 | const int *bus_range; |
e05b3b4a PM |
92 | int len; |
93 | ||
94 | if (pci_bus >= pci_bus_count) | |
95 | return; | |
e2eb6392 | 96 | bus_range = of_get_property(node, "bus-range", &len); |
e05b3b4a PM |
97 | if (bus_range == NULL || len < 2 * sizeof(int)) { |
98 | printk(KERN_WARNING "Can't get bus-range for %s, " | |
99 | "assuming it starts at 0\n", node->full_name); | |
100 | pci_to_OF_bus_map[pci_bus] = 0; | |
101 | } else | |
102 | pci_to_OF_bus_map[pci_bus] = bus_range[0]; | |
103 | ||
66524b22 | 104 | for_each_child_of_node(node, node) { |
e05b3b4a | 105 | struct pci_dev* dev; |
a7f67bdf | 106 | const unsigned int *class_code, *reg; |
e05b3b4a | 107 | |
e2eb6392 | 108 | class_code = of_get_property(node, "class-code", NULL); |
e05b3b4a PM |
109 | if (!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI && |
110 | (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS)) | |
111 | continue; | |
e2eb6392 | 112 | reg = of_get_property(node, "reg", NULL); |
e05b3b4a PM |
113 | if (!reg) |
114 | continue; | |
ab462768 AC |
115 | dev = pci_get_bus_and_slot(pci_bus, ((reg[0] >> 8) & 0xff)); |
116 | if (!dev || !dev->subordinate) { | |
117 | pci_dev_put(dev); | |
e05b3b4a | 118 | continue; |
ab462768 | 119 | } |
e05b3b4a | 120 | make_one_node_map(node, dev->subordinate->number); |
ab462768 | 121 | pci_dev_put(dev); |
e05b3b4a PM |
122 | } |
123 | } | |
124 | ||
125 | void | |
126 | pcibios_make_OF_bus_map(void) | |
127 | { | |
128 | int i; | |
a4c9e328 | 129 | struct pci_controller *hose, *tmp; |
a7f67bdf | 130 | struct property *map_prop; |
8c8dc322 | 131 | struct device_node *dn; |
e05b3b4a | 132 | |
5cbded58 | 133 | pci_to_OF_bus_map = kmalloc(pci_bus_count, GFP_KERNEL); |
e05b3b4a PM |
134 | if (!pci_to_OF_bus_map) { |
135 | printk(KERN_ERR "Can't allocate OF bus map !\n"); | |
136 | return; | |
137 | } | |
138 | ||
139 | /* We fill the bus map with invalid values, that helps | |
140 | * debugging. | |
141 | */ | |
142 | for (i=0; i<pci_bus_count; i++) | |
143 | pci_to_OF_bus_map[i] = 0xff; | |
144 | ||
145 | /* For each hose, we begin searching bridges */ | |
a4c9e328 | 146 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { |
44ef3390 SR |
147 | struct device_node* node = hose->dn; |
148 | ||
e05b3b4a PM |
149 | if (!node) |
150 | continue; | |
151 | make_one_node_map(node, hose->first_busno); | |
152 | } | |
8c8dc322 SR |
153 | dn = of_find_node_by_path("/"); |
154 | map_prop = of_find_property(dn, "pci-OF-bus-map", NULL); | |
a7f67bdf JK |
155 | if (map_prop) { |
156 | BUG_ON(pci_bus_count > map_prop->length); | |
157 | memcpy(map_prop->value, pci_to_OF_bus_map, pci_bus_count); | |
158 | } | |
8c8dc322 | 159 | of_node_put(dn); |
e05b3b4a PM |
160 | #ifdef DEBUG |
161 | printk("PCI->OF bus map:\n"); | |
162 | for (i=0; i<pci_bus_count; i++) { | |
163 | if (pci_to_OF_bus_map[i] == 0xff) | |
164 | continue; | |
165 | printk("%d -> %d\n", i, pci_to_OF_bus_map[i]); | |
166 | } | |
167 | #endif | |
168 | } | |
169 | ||
170 | typedef int (*pci_OF_scan_iterator)(struct device_node* node, void* data); | |
171 | ||
172 | static struct device_node* | |
66524b22 | 173 | scan_OF_pci_childs(struct device_node *parent, pci_OF_scan_iterator filter, void* data) |
e05b3b4a | 174 | { |
66524b22 | 175 | struct device_node *node; |
e05b3b4a PM |
176 | struct device_node* sub_node; |
177 | ||
66524b22 | 178 | for_each_child_of_node(parent, node) { |
a7f67bdf | 179 | const unsigned int *class_code; |
e05b3b4a | 180 | |
66524b22 SR |
181 | if (filter(node, data)) { |
182 | of_node_put(node); | |
e05b3b4a | 183 | return node; |
66524b22 | 184 | } |
e05b3b4a PM |
185 | |
186 | /* For PCI<->PCI bridges or CardBus bridges, we go down | |
187 | * Note: some OFs create a parent node "multifunc-device" as | |
188 | * a fake root for all functions of a multi-function device, | |
189 | * we go down them as well. | |
190 | */ | |
e2eb6392 | 191 | class_code = of_get_property(node, "class-code", NULL); |
e05b3b4a PM |
192 | if ((!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI && |
193 | (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS)) && | |
194 | strcmp(node->name, "multifunc-device")) | |
195 | continue; | |
66524b22 SR |
196 | sub_node = scan_OF_pci_childs(node, filter, data); |
197 | if (sub_node) { | |
198 | of_node_put(node); | |
e05b3b4a | 199 | return sub_node; |
66524b22 | 200 | } |
e05b3b4a PM |
201 | } |
202 | return NULL; | |
203 | } | |
204 | ||
dae4828d BH |
205 | static struct device_node *scan_OF_for_pci_dev(struct device_node *parent, |
206 | unsigned int devfn) | |
e05b3b4a | 207 | { |
f8178691 | 208 | struct device_node *np, *cnp; |
dae4828d BH |
209 | const u32 *reg; |
210 | unsigned int psize; | |
211 | ||
85e99b9f | 212 | for_each_child_of_node(parent, np) { |
e2eb6392 | 213 | reg = of_get_property(np, "reg", &psize); |
f8178691 | 214 | if (reg && psize >= 4 && ((reg[0] >> 8) & 0xff) == devfn) |
dae4828d | 215 | return np; |
f8178691 TA |
216 | |
217 | /* Note: some OFs create a parent node "multifunc-device" as | |
218 | * a fake root for all functions of a multi-function device, | |
219 | * we go down them as well. */ | |
220 | if (!strcmp(np->name, "multifunc-device")) { | |
221 | cnp = scan_OF_for_pci_dev(np, devfn); | |
222 | if (cnp) | |
223 | return cnp; | |
224 | } | |
dae4828d BH |
225 | } |
226 | return NULL; | |
e05b3b4a PM |
227 | } |
228 | ||
dae4828d BH |
229 | |
230 | static struct device_node *scan_OF_for_pci_bus(struct pci_bus *bus) | |
e05b3b4a | 231 | { |
dae4828d BH |
232 | struct device_node *parent, *np; |
233 | ||
234 | /* Are we a root bus ? */ | |
235 | if (bus->self == NULL || bus->parent == NULL) { | |
0b1d40c4 | 236 | struct pci_controller *hose = pci_bus_to_host(bus); |
dae4828d BH |
237 | if (hose == NULL) |
238 | return NULL; | |
44ef3390 | 239 | return of_node_get(hose->dn); |
dae4828d BH |
240 | } |
241 | ||
242 | /* not a root bus, we need to get our parent */ | |
243 | parent = scan_OF_for_pci_bus(bus->parent); | |
244 | if (parent == NULL) | |
245 | return NULL; | |
246 | ||
247 | /* now iterate for children for a match */ | |
248 | np = scan_OF_for_pci_dev(parent, bus->self->devfn); | |
249 | of_node_put(parent); | |
250 | ||
dae4828d | 251 | return np; |
e05b3b4a PM |
252 | } |
253 | ||
254 | /* | |
255 | * Scans the OF tree for a device node matching a PCI device | |
256 | */ | |
257 | struct device_node * | |
258 | pci_busdev_to_OF_node(struct pci_bus *bus, int devfn) | |
259 | { | |
dae4828d | 260 | struct device_node *parent, *np; |
e05b3b4a | 261 | |
b0494bc8 | 262 | pr_debug("pci_busdev_to_OF_node(%d,0x%x)\n", bus->number, devfn); |
dae4828d BH |
263 | parent = scan_OF_for_pci_bus(bus); |
264 | if (parent == NULL) | |
e05b3b4a | 265 | return NULL; |
b0494bc8 | 266 | pr_debug(" parent is %s\n", parent ? parent->full_name : "<NULL>"); |
dae4828d BH |
267 | np = scan_OF_for_pci_dev(parent, devfn); |
268 | of_node_put(parent); | |
b0494bc8 | 269 | pr_debug(" result is %s\n", np ? np->full_name : "<NULL>"); |
dae4828d BH |
270 | |
271 | /* XXX most callers don't release the returned node | |
272 | * mostly because ppc64 doesn't increase the refcount, | |
273 | * we need to fix that. | |
e05b3b4a | 274 | */ |
dae4828d | 275 | return np; |
e05b3b4a PM |
276 | } |
277 | EXPORT_SYMBOL(pci_busdev_to_OF_node); | |
278 | ||
279 | struct device_node* | |
280 | pci_device_to_OF_node(struct pci_dev *dev) | |
281 | { | |
282 | return pci_busdev_to_OF_node(dev->bus, dev->devfn); | |
283 | } | |
284 | EXPORT_SYMBOL(pci_device_to_OF_node); | |
285 | ||
e05b3b4a PM |
286 | static int |
287 | find_OF_pci_device_filter(struct device_node* node, void* data) | |
288 | { | |
289 | return ((void *)node == data); | |
290 | } | |
291 | ||
292 | /* | |
293 | * Returns the PCI device matching a given OF node | |
294 | */ | |
295 | int | |
296 | pci_device_from_OF_node(struct device_node* node, u8* bus, u8* devfn) | |
297 | { | |
a7f67bdf | 298 | const unsigned int *reg; |
e05b3b4a PM |
299 | struct pci_controller* hose; |
300 | struct pci_dev* dev = NULL; | |
301 | ||
e05b3b4a PM |
302 | /* Make sure it's really a PCI device */ |
303 | hose = pci_find_hose_for_OF_device(node); | |
44ef3390 | 304 | if (!hose || !hose->dn) |
e05b3b4a | 305 | return -ENODEV; |
66524b22 | 306 | if (!scan_OF_pci_childs(hose->dn, |
e05b3b4a PM |
307 | find_OF_pci_device_filter, (void *)node)) |
308 | return -ENODEV; | |
e2eb6392 | 309 | reg = of_get_property(node, "reg", NULL); |
e05b3b4a PM |
310 | if (!reg) |
311 | return -ENODEV; | |
312 | *bus = (reg[0] >> 16) & 0xff; | |
313 | *devfn = ((reg[0] >> 8) & 0xff); | |
314 | ||
315 | /* Ok, here we need some tweak. If we have already renumbered | |
316 | * all busses, we can't rely on the OF bus number any more. | |
317 | * the pci_to_OF_bus_map is not enough as several PCI busses | |
318 | * may match the same OF bus number. | |
319 | */ | |
320 | if (!pci_to_OF_bus_map) | |
321 | return 0; | |
322 | ||
323 | for_each_pci_dev(dev) | |
324 | if (pci_to_OF_bus_map[dev->bus->number] == *bus && | |
325 | dev->devfn == *devfn) { | |
326 | *bus = dev->bus->number; | |
327 | pci_dev_put(dev); | |
328 | return 0; | |
329 | } | |
330 | ||
331 | return -ENODEV; | |
332 | } | |
333 | EXPORT_SYMBOL(pci_device_from_OF_node); | |
334 | ||
e05b3b4a PM |
335 | /* We create the "pci-OF-bus-map" property now so it appears in the |
336 | * /proc device tree | |
337 | */ | |
338 | void __init | |
339 | pci_create_OF_bus_map(void) | |
340 | { | |
341 | struct property* of_prop; | |
8c8dc322 SR |
342 | struct device_node *dn; |
343 | ||
e05b3b4a | 344 | of_prop = (struct property*) alloc_bootmem(sizeof(struct property) + 256); |
8c8dc322 SR |
345 | if (!of_prop) |
346 | return; | |
347 | dn = of_find_node_by_path("/"); | |
348 | if (dn) { | |
e05b3b4a PM |
349 | memset(of_prop, -1, sizeof(struct property) + 256); |
350 | of_prop->name = "pci-OF-bus-map"; | |
351 | of_prop->length = 256; | |
1a38147e | 352 | of_prop->value = &of_prop[1]; |
8c8dc322 SR |
353 | prom_add_property(dn, of_prop); |
354 | of_node_put(dn); | |
e05b3b4a PM |
355 | } |
356 | } | |
357 | ||
0ed2c722 | 358 | void __devinit pcibios_setup_phb_io_space(struct pci_controller *hose) |
53280323 | 359 | { |
53280323 BH |
360 | unsigned long io_offset; |
361 | struct resource *res = &hose->io_resource; | |
362 | ||
53280323 BH |
363 | /* Fixup IO space offset */ |
364 | io_offset = (unsigned long)hose->io_base_virt - isa_io_base; | |
365 | res->start = (res->start + io_offset) & 0xffffffffu; | |
366 | res->end = (res->end + io_offset) & 0xffffffffu; | |
53280323 BH |
367 | } |
368 | ||
3fd94c6b | 369 | static int __init pcibios_init(void) |
e05b3b4a | 370 | { |
a4c9e328 | 371 | struct pci_controller *hose, *tmp; |
a4c9e328 | 372 | int next_busno = 0; |
e05b3b4a PM |
373 | |
374 | printk(KERN_INFO "PCI: Probing PCI hardware\n"); | |
375 | ||
fc3fb71c BH |
376 | if (ppc_pci_flags & PPC_PCI_REASSIGN_ALL_BUS) |
377 | pci_assign_all_buses = 1; | |
378 | ||
e05b3b4a | 379 | /* Scan all of the recorded PCI controllers. */ |
a4c9e328 | 380 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { |
e05b3b4a PM |
381 | if (pci_assign_all_buses) |
382 | hose->first_busno = next_busno; | |
383 | hose->last_busno = 0xff; | |
b5d937de | 384 | pcibios_scan_phb(hose); |
53280323 | 385 | pci_bus_add_devices(hose->bus); |
e05b3b4a PM |
386 | if (pci_assign_all_buses || next_busno <= hose->last_busno) |
387 | next_busno = hose->last_busno + pcibios_assign_bus_offset; | |
388 | } | |
389 | pci_bus_count = next_busno; | |
390 | ||
391 | /* OpenFirmware based machines need a map of OF bus | |
392 | * numbers vs. kernel bus numbers since we may have to | |
393 | * remap them. | |
394 | */ | |
6b82b3e4 | 395 | if (pci_assign_all_buses) |
e05b3b4a PM |
396 | pcibios_make_OF_bus_map(); |
397 | ||
3fd94c6b BH |
398 | /* Call common code to handle resource allocation */ |
399 | pcibios_resource_survey(); | |
e05b3b4a PM |
400 | |
401 | /* Call machine dependent post-init code */ | |
402 | if (ppc_md.pcibios_after_init) | |
403 | ppc_md.pcibios_after_init(); | |
404 | ||
405 | return 0; | |
406 | } | |
407 | ||
408 | subsys_initcall(pcibios_init); | |
409 | ||
0b1d40c4 | 410 | static struct pci_controller* |
e05b3b4a PM |
411 | pci_bus_to_hose(int bus) |
412 | { | |
a4c9e328 | 413 | struct pci_controller *hose, *tmp; |
e05b3b4a | 414 | |
a4c9e328 | 415 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) |
e05b3b4a PM |
416 | if (bus >= hose->first_busno && bus <= hose->last_busno) |
417 | return hose; | |
418 | return NULL; | |
419 | } | |
420 | ||
e05b3b4a PM |
421 | /* Provide information on locations of various I/O regions in physical |
422 | * memory. Do this on a per-card basis so that we choose the right | |
423 | * root bridge. | |
424 | * Note that the returned IO or memory base is a physical address | |
425 | */ | |
426 | ||
427 | long sys_pciconfig_iobase(long which, unsigned long bus, unsigned long devfn) | |
428 | { | |
429 | struct pci_controller* hose; | |
430 | long result = -EOPNOTSUPP; | |
431 | ||
e05b3b4a PM |
432 | hose = pci_bus_to_hose(bus); |
433 | if (!hose) | |
434 | return -ENODEV; | |
435 | ||
436 | switch (which) { | |
437 | case IOBASE_BRIDGE_NUMBER: | |
438 | return (long)hose->first_busno; | |
439 | case IOBASE_MEMORY: | |
440 | return (long)hose->pci_mem_offset; | |
441 | case IOBASE_IO: | |
442 | return (long)hose->io_base_phys; | |
443 | case IOBASE_ISA_IO: | |
444 | return (long)isa_io_base; | |
445 | case IOBASE_ISA_MEM: | |
446 | return (long)isa_mem_base; | |
447 | } | |
448 | ||
449 | return result; | |
450 | } | |
451 | ||
e05b3b4a | 452 |