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14#include <linux/kernel.h>
15#include <linux/mm.h>
16#include <linux/pci.h>
17#include <linux/init.h>
18#include <linux/types.h>
19#include <linux/dma-debug.h>
20#include <linux/io.h>
21#include <linux/mutex.h>
22#include <linux/spinlock.h>
23#include <linux/export.h>
24
25unsigned long PCIBIOS_MIN_IO = 0x0000;
26unsigned long PCIBIOS_MIN_MEM = 0;
27
28
29
30
31static struct pci_channel *hose_head, **hose_tail = &hose_head;
32
33static int pci_initialized;
34
35static void pcibios_scanbus(struct pci_channel *hose)
36{
37 static int next_busno;
38 static int need_domain_info;
39 LIST_HEAD(resources);
40 struct resource *res;
41 resource_size_t offset;
42 int i;
43 struct pci_bus *bus;
44
45 for (i = 0; i < hose->nr_resources; i++) {
46 res = hose->resources + i;
47 offset = 0;
48 if (res->flags & IORESOURCE_IO)
49 offset = hose->io_offset;
50 else if (res->flags & IORESOURCE_MEM)
51 offset = hose->mem_offset;
52 pci_add_resource_offset(&resources, res, offset);
53 }
54
55 bus = pci_scan_root_bus(NULL, next_busno, hose->pci_ops, hose,
56 &resources);
57 hose->bus = bus;
58
59 need_domain_info = need_domain_info || hose->index;
60 hose->need_domain_info = need_domain_info;
61 if (bus) {
62 next_busno = bus->busn_res.end + 1;
63
64
65 if (next_busno > 224) {
66 next_busno = 0;
67 need_domain_info = 1;
68 }
69
70 pci_bus_size_bridges(bus);
71 pci_bus_assign_resources(bus);
72 pci_enable_bridges(bus);
73 } else {
74 pci_free_resource_list(&resources);
75 }
76}
77
78
79
80
81
82DEFINE_RAW_SPINLOCK(pci_config_lock);
83static DEFINE_MUTEX(pci_scan_mutex);
84
85int register_pci_controller(struct pci_channel *hose)
86{
87 int i;
88
89 for (i = 0; i < hose->nr_resources; i++) {
90 struct resource *res = hose->resources + i;
91
92 if (res->flags & IORESOURCE_IO) {
93 if (request_resource(&ioport_resource, res) < 0)
94 goto out;
95 } else {
96 if (request_resource(&iomem_resource, res) < 0)
97 goto out;
98 }
99 }
100
101 *hose_tail = hose;
102 hose_tail = &hose->next;
103
104
105
106
107 if (!hose->io_map_base) {
108 printk(KERN_WARNING
109 "registering PCI controller with io_map_base unset\n");
110 }
111
112
113
114
115 pcibios_enable_timers(hose);
116
117
118
119
120
121 if (pci_initialized) {
122 mutex_lock(&pci_scan_mutex);
123 pcibios_scanbus(hose);
124 mutex_unlock(&pci_scan_mutex);
125 }
126
127 return 0;
128
129out:
130 for (--i; i >= 0; i--)
131 release_resource(&hose->resources[i]);
132
133 printk(KERN_WARNING "Skipping PCI bus scan due to resource conflict\n");
134 return -1;
135}
136
137static int __init pcibios_init(void)
138{
139 struct pci_channel *hose;
140
141
142 for (hose = hose_head; hose; hose = hose->next)
143 pcibios_scanbus(hose);
144
145 pci_fixup_irqs(pci_common_swizzle, pcibios_map_platform_irq);
146
147 dma_debug_add_bus(&pci_bus_type);
148
149 pci_initialized = 1;
150
151 return 0;
152}
153subsys_initcall(pcibios_init);
154
155
156
157
158
159void pcibios_fixup_bus(struct pci_bus *bus)
160{
161}
162
163
164
165
166
167
168
169resource_size_t pcibios_align_resource(void *data, const struct resource *res,
170 resource_size_t size, resource_size_t align)
171{
172 struct pci_dev *dev = data;
173 struct pci_channel *hose = dev->sysdata;
174 resource_size_t start = res->start;
175
176 if (res->flags & IORESOURCE_IO) {
177 if (start < PCIBIOS_MIN_IO + hose->resources[0].start)
178 start = PCIBIOS_MIN_IO + hose->resources[0].start;
179
180
181
182
183 if (start & 0x300)
184 start = (start + 0x3ff) & ~0x3ff;
185 }
186
187 return start;
188}
189
190int pcibios_enable_device(struct pci_dev *dev, int mask)
191{
192 return pci_enable_resources(dev, mask);
193}
194
195static void __init
196pcibios_bus_report_status_early(struct pci_channel *hose,
197 int top_bus, int current_bus,
198 unsigned int status_mask, int warn)
199{
200 unsigned int pci_devfn;
201 u16 status;
202 int ret;
203
204 for (pci_devfn = 0; pci_devfn < 0xff; pci_devfn++) {
205 if (PCI_FUNC(pci_devfn))
206 continue;
207 ret = early_read_config_word(hose, top_bus, current_bus,
208 pci_devfn, PCI_STATUS, &status);
209 if (ret != PCIBIOS_SUCCESSFUL)
210 continue;
211 if (status == 0xffff)
212 continue;
213
214 early_write_config_word(hose, top_bus, current_bus,
215 pci_devfn, PCI_STATUS,
216 status & status_mask);
217 if (warn)
218 printk("(%02x:%02x: %04X) ", current_bus,
219 pci_devfn, status);
220 }
221}
222
223
224
225
226
227static void __init_refok
228pcibios_bus_report_status(struct pci_bus *bus, unsigned int status_mask,
229 int warn)
230{
231 struct pci_dev *dev;
232
233 list_for_each_entry(dev, &bus->devices, bus_list) {
234 u16 status;
235
236
237
238
239
240 if (dev->bus->number == 0 && dev->devfn == 0)
241 continue;
242
243 pci_read_config_word(dev, PCI_STATUS, &status);
244 if (status == 0xffff)
245 continue;
246
247 if ((status & status_mask) == 0)
248 continue;
249
250
251 pci_write_config_word(dev, PCI_STATUS, status & status_mask);
252
253 if (warn)
254 printk("(%s: %04X) ", pci_name(dev), status);
255 }
256
257 list_for_each_entry(dev, &bus->devices, bus_list)
258 if (dev->subordinate)
259 pcibios_bus_report_status(dev->subordinate, status_mask, warn);
260}
261
262void __init_refok pcibios_report_status(unsigned int status_mask, int warn)
263{
264 struct pci_channel *hose;
265
266 for (hose = hose_head; hose; hose = hose->next) {
267 if (unlikely(!hose->bus))
268 pcibios_bus_report_status_early(hose, hose_head->index,
269 hose->index, status_mask, warn);
270 else
271 pcibios_bus_report_status(hose->bus, status_mask, warn);
272 }
273}
274
275int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
276 enum pci_mmap_state mmap_state, int write_combine)
277{
278
279
280
281
282
283 if (mmap_state == pci_mmap_io)
284 return -EINVAL;
285
286
287
288
289 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
290
291 return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
292 vma->vm_end - vma->vm_start,
293 vma->vm_page_prot);
294}
295
296#ifndef CONFIG_GENERIC_IOMAP
297
298void __iomem *__pci_ioport_map(struct pci_dev *dev,
299 unsigned long port, unsigned int nr)
300{
301 struct pci_channel *chan = dev->sysdata;
302
303 if (unlikely(!chan->io_map_base)) {
304 chan->io_map_base = sh_io_port_base;
305
306 if (pci_domains_supported)
307 panic("To avoid data corruption io_map_base MUST be "
308 "set with multiple PCI domains.");
309 }
310
311 return (void __iomem *)(chan->io_map_base + port);
312}
313
314void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
315{
316 iounmap(addr);
317}
318EXPORT_SYMBOL(pci_iounmap);
319
320#endif
321
322EXPORT_SYMBOL(PCIBIOS_MIN_IO);
323EXPORT_SYMBOL(PCIBIOS_MIN_MEM);
324