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Paul Mackerrase05b3b42006-01-15 22:05:47 +11001/*
2 * Common pmac/prep/chrp pci routines. -- Cort
3 */
4
Paul Mackerrase05b3b42006-01-15 22:05:47 +11005#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>
Benjamin Herrenschmidt6e99e452006-07-10 04:44:42 -070014#include <linux/irq.h>
Benjamin Herrenschmidtf90bb152006-11-11 17:24:51 +110015#include <linux/list.h>
Stephen Rothwell66524b22007-12-21 15:52:43 +110016#include <linux/of.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090017#include <linux/slab.h>
Paul Mackerrase05b3b42006-01-15 22:05:47 +110018
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>
Milton Millerc3bd5172009-01-08 02:19:46 +000024#include <asm/ppc-pci.h>
Paul Mackerrase05b3b42006-01-15 22:05:47 +110025#include <asm/byteorder.h>
Paul Mackerrase05b3b42006-01-15 22:05:47 +110026#include <asm/uaccess.h>
27#include <asm/machdep.h>
28
29#undef DEBUG
30
Paul Mackerrase05b3b42006-01-15 22:05:47 +110031unsigned long isa_io_base = 0;
Paul Mackerrase05b3b42006-01-15 22:05:47 +110032unsigned long pci_dram_offset = 0;
33int pcibios_assign_bus_offset = 1;
34
35void pcibios_make_OF_bus_map(void);
36
Paul Mackerrase05b3b42006-01-15 22:05:47 +110037static void fixup_cpc710_pci64(struct pci_dev* dev);
Paul Mackerrase05b3b42006-01-15 22:05:47 +110038static u8* pci_to_OF_bus_map;
Paul Mackerrase05b3b42006-01-15 22:05:47 +110039
40/* By default, we don't re-assign bus numbers. We do this only on
41 * some pmacs
42 */
Benjamin Herrenschmidtfc3fb712007-12-20 14:54:46 +110043static int pci_assign_all_buses;
Paul Mackerrase05b3b42006-01-15 22:05:47 +110044
Paul Mackerrase05b3b42006-01-15 22:05:47 +110045static int pci_bus_count;
46
Benjamin Herrenschmidt7b6b5742008-10-13 17:51:46 +000047/* This will remain NULL for now, until isa-bridge.c is made common
48 * to both 32-bit and 64-bit.
49 */
50struct pci_dev *isa_bridge_pcidev;
51EXPORT_SYMBOL_GPL(isa_bridge_pcidev);
52
Paul Mackerrase05b3b42006-01-15 22:05:47 +110053static void
John Rigby4a015c32008-10-07 13:00:20 -060054fixup_hide_host_resource_fsl(struct pci_dev *dev)
Kumar Gala2052d6d2007-07-25 00:44:11 -050055{
56 int i, class = dev->class >> 8;
57
John Rigby4a015c32008-10-07 13:00:20 -060058 if ((class == PCI_CLASS_PROCESSOR_POWERPC ||
59 class == PCI_CLASS_BRIDGE_OTHER) &&
Kumar Gala2052d6d2007-07-25 00:44:11 -050060 (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}
69DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MOTOROLA, PCI_ANY_ID, fixup_hide_host_resource_fsl);
70DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID, fixup_hide_host_resource_fsl);
71
72static void
Paul Mackerrase05b3b42006-01-15 22:05:47 +110073fixup_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}
83DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CPC710_PCI64, fixup_cpc710_pci64);
84
Paul Mackerrase05b3b42006-01-15 22:05:47 +110085/*
86 * Functions below are used on OpenFirmware machines.
87 */
88static void
89make_one_node_map(struct device_node* node, u8 pci_bus)
90{
Jeremy Kerra7f67bd2006-07-12 15:35:54 +100091 const int *bus_range;
Paul Mackerrase05b3b42006-01-15 22:05:47 +110092 int len;
93
94 if (pci_bus >= pci_bus_count)
95 return;
Stephen Rothwelle2eb6392007-04-03 22:26:41 +100096 bus_range = of_get_property(node, "bus-range", &len);
Paul Mackerrase05b3b42006-01-15 22:05:47 +110097 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
Stephen Rothwell66524b22007-12-21 15:52:43 +1100104 for_each_child_of_node(node, node) {
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100105 struct pci_dev* dev;
Jeremy Kerra7f67bd2006-07-12 15:35:54 +1000106 const unsigned int *class_code, *reg;
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100107
Stephen Rothwelle2eb6392007-04-03 22:26:41 +1000108 class_code = of_get_property(node, "class-code", NULL);
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100109 if (!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
110 (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS))
111 continue;
Stephen Rothwelle2eb6392007-04-03 22:26:41 +1000112 reg = of_get_property(node, "reg", NULL);
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100113 if (!reg)
114 continue;
Alan Coxab462762007-04-23 14:47:59 +0100115 dev = pci_get_bus_and_slot(pci_bus, ((reg[0] >> 8) & 0xff));
116 if (!dev || !dev->subordinate) {
117 pci_dev_put(dev);
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100118 continue;
Alan Coxab462762007-04-23 14:47:59 +0100119 }
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100120 make_one_node_map(node, dev->subordinate->number);
Alan Coxab462762007-04-23 14:47:59 +0100121 pci_dev_put(dev);
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100122 }
123}
124
125void
126pcibios_make_OF_bus_map(void)
127{
128 int i;
Kumar Galaa4c9e322007-06-27 13:09:43 -0500129 struct pci_controller *hose, *tmp;
Jeremy Kerra7f67bd2006-07-12 15:35:54 +1000130 struct property *map_prop;
Stephen Rothwell8c8dc322007-04-24 13:50:55 +1000131 struct device_node *dn;
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100132
Robert P. J. Day5cbded52006-12-13 00:35:56 -0800133 pci_to_OF_bus_map = kmalloc(pci_bus_count, GFP_KERNEL);
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100134 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 */
Kumar Galaa4c9e322007-06-27 13:09:43 -0500146 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
Stephen Rothwell44ef3392007-12-10 14:33:21 +1100147 struct device_node* node = hose->dn;
148
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100149 if (!node)
150 continue;
151 make_one_node_map(node, hose->first_busno);
152 }
Stephen Rothwell8c8dc322007-04-24 13:50:55 +1000153 dn = of_find_node_by_path("/");
154 map_prop = of_find_property(dn, "pci-OF-bus-map", NULL);
Jeremy Kerra7f67bd2006-07-12 15:35:54 +1000155 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 }
Stephen Rothwell8c8dc322007-04-24 13:50:55 +1000159 of_node_put(dn);
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100160#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
170typedef int (*pci_OF_scan_iterator)(struct device_node* node, void* data);
171
172static struct device_node*
Stephen Rothwell66524b22007-12-21 15:52:43 +1100173scan_OF_pci_childs(struct device_node *parent, pci_OF_scan_iterator filter, void* data)
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100174{
Stephen Rothwell66524b22007-12-21 15:52:43 +1100175 struct device_node *node;
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100176 struct device_node* sub_node;
177
Stephen Rothwell66524b22007-12-21 15:52:43 +1100178 for_each_child_of_node(parent, node) {
Jeremy Kerra7f67bd2006-07-12 15:35:54 +1000179 const unsigned int *class_code;
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100180
Stephen Rothwell66524b22007-12-21 15:52:43 +1100181 if (filter(node, data)) {
182 of_node_put(node);
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100183 return node;
Stephen Rothwell66524b22007-12-21 15:52:43 +1100184 }
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100185
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 */
Stephen Rothwelle2eb6392007-04-03 22:26:41 +1000191 class_code = of_get_property(node, "class-code", NULL);
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100192 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;
Stephen Rothwell66524b22007-12-21 15:52:43 +1100196 sub_node = scan_OF_pci_childs(node, filter, data);
197 if (sub_node) {
198 of_node_put(node);
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100199 return sub_node;
Stephen Rothwell66524b22007-12-21 15:52:43 +1100200 }
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100201 }
202 return NULL;
203}
204
Benjamin Herrenschmidtdae48282006-12-11 14:09:07 +1100205static struct device_node *scan_OF_for_pci_dev(struct device_node *parent,
206 unsigned int devfn)
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100207{
Tom Arbucklef8178692009-02-11 10:41:48 +0000208 struct device_node *np, *cnp;
Benjamin Herrenschmidtdae48282006-12-11 14:09:07 +1100209 const u32 *reg;
210 unsigned int psize;
211
Stephen Rothwell85e99b92008-01-03 15:13:37 +1100212 for_each_child_of_node(parent, np) {
Stephen Rothwelle2eb6392007-04-03 22:26:41 +1000213 reg = of_get_property(np, "reg", &psize);
Tom Arbucklef8178692009-02-11 10:41:48 +0000214 if (reg && psize >= 4 && ((reg[0] >> 8) & 0xff) == devfn)
Benjamin Herrenschmidtdae48282006-12-11 14:09:07 +1100215 return np;
Tom Arbucklef8178692009-02-11 10:41:48 +0000216
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 }
Benjamin Herrenschmidtdae48282006-12-11 14:09:07 +1100225 }
226 return NULL;
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100227}
228
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100229
Benjamin Herrenschmidtdae48282006-12-11 14:09:07 +1100230static struct device_node *scan_OF_for_pci_bus(struct pci_bus *bus)
231{
232 struct device_node *parent, *np;
233
234 /* Are we a root bus ? */
235 if (bus->self == NULL || bus->parent == NULL) {
Kumar Gala0b1d40c2007-06-27 10:27:33 -0500236 struct pci_controller *hose = pci_bus_to_host(bus);
Benjamin Herrenschmidtdae48282006-12-11 14:09:07 +1100237 if (hose == NULL)
238 return NULL;
Stephen Rothwell44ef3392007-12-10 14:33:21 +1100239 return of_node_get(hose->dn);
Benjamin Herrenschmidtdae48282006-12-11 14:09:07 +1100240 }
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
Benjamin Herrenschmidtdae48282006-12-11 14:09:07 +1100251 return np;
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100252}
253
254/*
255 * Scans the OF tree for a device node matching a PCI device
256 */
257struct device_node *
258pci_busdev_to_OF_node(struct pci_bus *bus, int devfn)
259{
Benjamin Herrenschmidtdae48282006-12-11 14:09:07 +1100260 struct device_node *parent, *np;
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100261
Benjamin Herrenschmidtb0494bc2008-10-27 19:48:22 +0000262 pr_debug("pci_busdev_to_OF_node(%d,0x%x)\n", bus->number, devfn);
Benjamin Herrenschmidtdae48282006-12-11 14:09:07 +1100263 parent = scan_OF_for_pci_bus(bus);
264 if (parent == NULL)
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100265 return NULL;
Benjamin Herrenschmidtb0494bc2008-10-27 19:48:22 +0000266 pr_debug(" parent is %s\n", parent ? parent->full_name : "<NULL>");
Benjamin Herrenschmidtdae48282006-12-11 14:09:07 +1100267 np = scan_OF_for_pci_dev(parent, devfn);
268 of_node_put(parent);
Benjamin Herrenschmidtb0494bc2008-10-27 19:48:22 +0000269 pr_debug(" result is %s\n", np ? np->full_name : "<NULL>");
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100270
Benjamin Herrenschmidtdae48282006-12-11 14:09:07 +1100271 /* XXX most callers don't release the returned node
272 * mostly because ppc64 doesn't increase the refcount,
273 * we need to fix that.
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100274 */
Benjamin Herrenschmidtdae48282006-12-11 14:09:07 +1100275 return np;
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100276}
277EXPORT_SYMBOL(pci_busdev_to_OF_node);
278
279struct device_node*
280pci_device_to_OF_node(struct pci_dev *dev)
281{
282 return pci_busdev_to_OF_node(dev->bus, dev->devfn);
283}
284EXPORT_SYMBOL(pci_device_to_OF_node);
285
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100286static int
287find_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 */
295int
296pci_device_from_OF_node(struct device_node* node, u8* bus, u8* devfn)
297{
Jeremy Kerra7f67bd2006-07-12 15:35:54 +1000298 const unsigned int *reg;
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100299 struct pci_controller* hose;
300 struct pci_dev* dev = NULL;
301
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100302 /* Make sure it's really a PCI device */
303 hose = pci_find_hose_for_OF_device(node);
Stephen Rothwell44ef3392007-12-10 14:33:21 +1100304 if (!hose || !hose->dn)
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100305 return -ENODEV;
Stephen Rothwell66524b22007-12-21 15:52:43 +1100306 if (!scan_OF_pci_childs(hose->dn,
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100307 find_OF_pci_device_filter, (void *)node))
308 return -ENODEV;
Stephen Rothwelle2eb6392007-04-03 22:26:41 +1000309 reg = of_get_property(node, "reg", NULL);
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100310 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}
333EXPORT_SYMBOL(pci_device_from_OF_node);
334
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100335/* We create the "pci-OF-bus-map" property now so it appears in the
336 * /proc device tree
337 */
338void __init
339pci_create_OF_bus_map(void)
340{
341 struct property* of_prop;
Stephen Rothwell8c8dc322007-04-24 13:50:55 +1000342 struct device_node *dn;
343
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100344 of_prop = (struct property*) alloc_bootmem(sizeof(struct property) + 256);
Stephen Rothwell8c8dc322007-04-24 13:50:55 +1000345 if (!of_prop)
346 return;
347 dn = of_find_node_by_path("/");
348 if (dn) {
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100349 memset(of_prop, -1, sizeof(struct property) + 256);
350 of_prop->name = "pci-OF-bus-map";
351 of_prop->length = 256;
Stephen Rothwell1a381472007-04-03 10:58:52 +1000352 of_prop->value = &of_prop[1];
Stephen Rothwell8c8dc322007-04-24 13:50:55 +1000353 prom_add_property(dn, of_prop);
354 of_node_put(dn);
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100355 }
356}
357
Grant Likely0ed2c722009-08-28 08:58:16 +0000358void __devinit pcibios_setup_phb_io_space(struct pci_controller *hose)
Benjamin Herrenschmidt53280322008-10-27 19:48:29 +0000359{
Benjamin Herrenschmidt53280322008-10-27 19:48:29 +0000360 unsigned long io_offset;
361 struct resource *res = &hose->io_resource;
362
Benjamin Herrenschmidt53280322008-10-27 19:48:29 +0000363 /* 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;
Benjamin Herrenschmidt53280322008-10-27 19:48:29 +0000367}
368
Benjamin Herrenschmidt3fd94c62007-12-20 14:54:53 +1100369static int __init pcibios_init(void)
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100370{
Kumar Galaa4c9e322007-06-27 13:09:43 -0500371 struct pci_controller *hose, *tmp;
Kumar Galaa4c9e322007-06-27 13:09:43 -0500372 int next_busno = 0;
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100373
374 printk(KERN_INFO "PCI: Probing PCI hardware\n");
375
Benjamin Herrenschmidtfc3fb712007-12-20 14:54:46 +1100376 if (ppc_pci_flags & PPC_PCI_REASSIGN_ALL_BUS)
377 pci_assign_all_buses = 1;
378
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100379 /* Scan all of the recorded PCI controllers. */
Kumar Galaa4c9e322007-06-27 13:09:43 -0500380 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100381 if (pci_assign_all_buses)
382 hose->first_busno = next_busno;
383 hose->last_busno = 0xff;
Grant Likelyb5d937d2011-02-04 11:24:11 -0700384 pcibios_scan_phb(hose);
Benjamin Herrenschmidt53280322008-10-27 19:48:29 +0000385 pci_bus_add_devices(hose->bus);
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100386 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 */
Anton Vorontsov6b82b3e2008-12-09 09:47:29 +0000395 if (pci_assign_all_buses)
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100396 pcibios_make_OF_bus_map();
397
Benjamin Herrenschmidt3fd94c62007-12-20 14:54:53 +1100398 /* Call common code to handle resource allocation */
399 pcibios_resource_survey();
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100400
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
408subsys_initcall(pcibios_init);
409
Kumar Gala0b1d40c2007-06-27 10:27:33 -0500410static struct pci_controller*
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100411pci_bus_to_hose(int bus)
412{
Kumar Galaa4c9e322007-06-27 13:09:43 -0500413 struct pci_controller *hose, *tmp;
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100414
Kumar Galaa4c9e322007-06-27 13:09:43 -0500415 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100416 if (bus >= hose->first_busno && bus <= hose->last_busno)
417 return hose;
418 return NULL;
419}
420
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100421/* 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
427long sys_pciconfig_iobase(long which, unsigned long bus, unsigned long devfn)
428{
429 struct pci_controller* hose;
430 long result = -EOPNOTSUPP;
431
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100432 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
Paul Mackerrase05b3b42006-01-15 22:05:47 +1100452