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Commit | Line | Data |
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1da177e4 LT |
1 | #include <linux/pci.h> |
2 | #include <linux/acpi.h> | |
3 | #include <linux/init.h> | |
b33fa1f3 | 4 | #include <linux/irq.h> |
036fff4c | 5 | #include <linux/dmi.h> |
69e1a33f | 6 | #include <asm/numa.h> |
82487711 | 7 | #include <asm/pci_x86.h> |
1da177e4 | 8 | |
62f420f8 | 9 | struct pci_root_info { |
42887b29 | 10 | struct acpi_device *bridge; |
62f420f8 GH |
11 | char *name; |
12 | unsigned int res_num; | |
13 | struct resource *res; | |
14 | struct pci_bus *bus; | |
15 | int busnum; | |
16 | }; | |
17 | ||
18 | static acpi_status | |
19 | resource_to_addr(struct acpi_resource *resource, | |
20 | struct acpi_resource_address64 *addr) | |
21 | { | |
22 | acpi_status status; | |
23 | ||
24 | status = acpi_resource_to_address64(resource, addr); | |
25 | if (ACPI_SUCCESS(status) && | |
26 | (addr->resource_type == ACPI_MEMORY_RANGE || | |
27 | addr->resource_type == ACPI_IO_RANGE) && | |
28 | addr->address_length > 0 && | |
29 | addr->producer_consumer == ACPI_PRODUCER) { | |
30 | return AE_OK; | |
31 | } | |
32 | return AE_ERROR; | |
33 | } | |
34 | ||
35 | static acpi_status | |
36 | count_resource(struct acpi_resource *acpi_res, void *data) | |
37 | { | |
38 | struct pci_root_info *info = data; | |
39 | struct acpi_resource_address64 addr; | |
40 | acpi_status status; | |
41 | ||
42 | status = resource_to_addr(acpi_res, &addr); | |
43 | if (ACPI_SUCCESS(status)) | |
44 | info->res_num++; | |
45 | return AE_OK; | |
46 | } | |
47 | ||
f9cde5ff GH |
48 | static int |
49 | bus_has_transparent_bridge(struct pci_bus *bus) | |
50 | { | |
51 | struct pci_dev *dev; | |
52 | ||
53 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
54 | u16 class = dev->class >> 8; | |
55 | ||
56 | if (class == PCI_CLASS_BRIDGE_PCI && dev->transparent) | |
57 | return true; | |
58 | } | |
59 | return false; | |
60 | } | |
61 | ||
62f420f8 GH |
62 | static acpi_status |
63 | setup_resource(struct acpi_resource *acpi_res, void *data) | |
64 | { | |
65 | struct pci_root_info *info = data; | |
66 | struct resource *res; | |
67 | struct acpi_resource_address64 addr; | |
68 | acpi_status status; | |
69 | unsigned long flags; | |
70 | struct resource *root; | |
f9cde5ff | 71 | int max_root_bus_resources = PCI_BUS_NUM_RESOURCES; |
2cdb3f1d YL |
72 | u64 start, end; |
73 | ||
74 | if (bus_has_transparent_bridge(info->bus)) | |
75 | max_root_bus_resources -= 3; | |
3d9befd2 | 76 | |
62f420f8 GH |
77 | status = resource_to_addr(acpi_res, &addr); |
78 | if (!ACPI_SUCCESS(status)) | |
79 | return AE_OK; | |
80 | ||
81 | if (addr.resource_type == ACPI_MEMORY_RANGE) { | |
82 | root = &iomem_resource; | |
83 | flags = IORESOURCE_MEM; | |
84 | if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY) | |
85 | flags |= IORESOURCE_PREFETCH; | |
86 | } else if (addr.resource_type == ACPI_IO_RANGE) { | |
87 | root = &ioport_resource; | |
88 | flags = IORESOURCE_IO; | |
89 | } else | |
90 | return AE_OK; | |
91 | ||
2cdb3f1d YL |
92 | start = addr.minimum + addr.translation_offset; |
93 | end = start + addr.address_length - 1; | |
f9cde5ff | 94 | if (info->res_num >= max_root_bus_resources) { |
f1db6fde BH |
95 | if (pci_probe & PCI_USE__CRS) |
96 | printk(KERN_WARNING "PCI: Failed to allocate " | |
97 | "0x%lx-0x%lx from %s for %s due to _CRS " | |
98 | "returning more than %d resource descriptors\n", | |
99 | (unsigned long) start, (unsigned long) end, | |
100 | root->name, info->name, max_root_bus_resources); | |
f9cde5ff GH |
101 | return AE_OK; |
102 | } | |
103 | ||
2cdb3f1d YL |
104 | res = &info->res[info->res_num]; |
105 | res->name = info->name; | |
106 | res->flags = flags; | |
107 | res->start = start; | |
108 | res->end = end; | |
109 | res->child = NULL; | |
110 | ||
f1db6fde BH |
111 | if (!(pci_probe & PCI_USE__CRS)) { |
112 | dev_printk(KERN_DEBUG, &info->bridge->dev, | |
113 | "host bridge window %pR (ignored)\n", res); | |
114 | return AE_OK; | |
115 | } | |
116 | ||
62f420f8 | 117 | if (insert_resource(root, res)) { |
c7dabef8 BH |
118 | dev_err(&info->bridge->dev, |
119 | "can't allocate host bridge window %pR\n", res); | |
62f420f8 GH |
120 | } else { |
121 | info->bus->resource[info->res_num] = res; | |
122 | info->res_num++; | |
42887b29 | 123 | if (addr.translation_offset) |
c7dabef8 | 124 | dev_info(&info->bridge->dev, "host bridge window %pR " |
42887b29 BH |
125 | "(PCI address [%#llx-%#llx])\n", |
126 | res, res->start - addr.translation_offset, | |
127 | res->end - addr.translation_offset); | |
128 | else | |
129 | dev_info(&info->bridge->dev, | |
c7dabef8 | 130 | "host bridge window %pR\n", res); |
62f420f8 GH |
131 | } |
132 | return AE_OK; | |
133 | } | |
134 | ||
62f420f8 GH |
135 | static void |
136 | get_current_resources(struct acpi_device *device, int busnum, | |
cb3576fa | 137 | int domain, struct pci_bus *bus) |
62f420f8 GH |
138 | { |
139 | struct pci_root_info info; | |
140 | size_t size; | |
141 | ||
f1db6fde BH |
142 | if (!(pci_probe & PCI_USE__CRS)) |
143 | dev_info(&device->dev, | |
144 | "ignoring host bridge windows from ACPI; " | |
145 | "boot with \"pci=use_crs\" to use them\n"); | |
146 | ||
42887b29 | 147 | info.bridge = device; |
62f420f8 GH |
148 | info.bus = bus; |
149 | info.res_num = 0; | |
150 | acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource, | |
151 | &info); | |
152 | if (!info.res_num) | |
153 | return; | |
154 | ||
155 | size = sizeof(*info.res) * info.res_num; | |
156 | info.res = kmalloc(size, GFP_KERNEL); | |
157 | if (!info.res) | |
158 | goto res_alloc_fail; | |
159 | ||
cb3576fa | 160 | info.name = kmalloc(16, GFP_KERNEL); |
62f420f8 GH |
161 | if (!info.name) |
162 | goto name_alloc_fail; | |
cb3576fa | 163 | sprintf(info.name, "PCI Bus %04x:%02x", domain, busnum); |
62f420f8 GH |
164 | |
165 | info.res_num = 0; | |
166 | acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource, | |
167 | &info); | |
62f420f8 GH |
168 | |
169 | return; | |
170 | ||
171 | name_alloc_fail: | |
172 | kfree(info.res); | |
173 | res_alloc_fail: | |
174 | return; | |
175 | } | |
176 | ||
1da177e4 LT |
177 | struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum) |
178 | { | |
69e1a33f | 179 | struct pci_bus *bus; |
08f1c192 | 180 | struct pci_sysdata *sd; |
871d5f8d YL |
181 | int node; |
182 | #ifdef CONFIG_ACPI_NUMA | |
08f1c192 | 183 | int pxm; |
871d5f8d | 184 | #endif |
08f1c192 | 185 | |
a79e4198 | 186 | if (domain && !pci_domains_supported) { |
2a6bed83 BH |
187 | printk(KERN_WARNING "pci_bus %04x:%02x: " |
188 | "ignored (multiple domains not supported)\n", | |
189 | domain, busnum); | |
a79e4198 JG |
190 | return NULL; |
191 | } | |
192 | ||
871d5f8d YL |
193 | node = -1; |
194 | #ifdef CONFIG_ACPI_NUMA | |
195 | pxm = acpi_get_pxm(device->handle); | |
196 | if (pxm >= 0) | |
197 | node = pxm_to_node(pxm); | |
198 | if (node != -1) | |
199 | set_mp_bus_to_node(busnum, node); | |
200 | else | |
871d5f8d | 201 | #endif |
871d5f8d | 202 | node = get_mp_bus_to_node(busnum); |
b755de8d YL |
203 | |
204 | if (node != -1 && !node_online(node)) | |
205 | node = -1; | |
871d5f8d | 206 | |
08f1c192 MBY |
207 | /* Allocate per-root-bus (not per bus) arch-specific data. |
208 | * TODO: leak; this memory is never freed. | |
209 | * It's arguable whether it's worth the trouble to care. | |
210 | */ | |
211 | sd = kzalloc(sizeof(*sd), GFP_KERNEL); | |
212 | if (!sd) { | |
2a6bed83 BH |
213 | printk(KERN_WARNING "pci_bus %04x:%02x: " |
214 | "ignored (out of memory)\n", domain, busnum); | |
08f1c192 MBY |
215 | return NULL; |
216 | } | |
69e1a33f | 217 | |
a79e4198 | 218 | sd->domain = domain; |
871d5f8d | 219 | sd->node = node; |
b87e81e5 | 220 | /* |
221 | * Maybe the desired pci bus has been already scanned. In such case | |
222 | * it is unnecessary to scan the pci bus with the given domain,busnum. | |
223 | */ | |
224 | bus = pci_find_bus(domain, busnum); | |
225 | if (bus) { | |
226 | /* | |
227 | * If the desired bus exits, the content of bus->sysdata will | |
228 | * be replaced by sd. | |
229 | */ | |
230 | memcpy(bus->sysdata, sd, sizeof(*sd)); | |
231 | kfree(sd); | |
626fdfec YL |
232 | } else { |
233 | bus = pci_create_bus(NULL, busnum, &pci_root_ops, sd); | |
234 | if (bus) { | |
f1db6fde | 235 | get_current_resources(device, busnum, domain, bus); |
626fdfec YL |
236 | bus->subordinate = pci_scan_child_bus(bus); |
237 | } | |
238 | } | |
08f1c192 | 239 | |
08f1c192 MBY |
240 | if (!bus) |
241 | kfree(sd); | |
242 | ||
dbb6152e | 243 | if (bus && node != -1) { |
69e1a33f | 244 | #ifdef CONFIG_ACPI_NUMA |
dbb6152e | 245 | if (pxm >= 0) |
2b8c2efe BH |
246 | dev_printk(KERN_DEBUG, &bus->dev, |
247 | "on NUMA node %d (pxm %d)\n", node, pxm); | |
dbb6152e | 248 | #else |
2b8c2efe | 249 | dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node); |
69e1a33f | 250 | #endif |
dbb6152e | 251 | } |
62f420f8 | 252 | |
69e1a33f | 253 | return bus; |
1da177e4 LT |
254 | } |
255 | ||
8dd779b1 | 256 | int __init pci_acpi_init(void) |
1da177e4 LT |
257 | { |
258 | struct pci_dev *dev = NULL; | |
259 | ||
260 | if (pcibios_scanned) | |
261 | return 0; | |
262 | ||
263 | if (acpi_noirq) | |
264 | return 0; | |
265 | ||
266 | printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n"); | |
267 | acpi_irq_penalty_init(); | |
268 | pcibios_scanned++; | |
269 | pcibios_enable_irq = acpi_pci_irq_enable; | |
87bec66b | 270 | pcibios_disable_irq = acpi_pci_irq_disable; |
1da177e4 LT |
271 | |
272 | if (pci_routeirq) { | |
273 | /* | |
274 | * PCI IRQ routing is set up by pci_enable_device(), but we | |
275 | * also do it here in case there are still broken drivers that | |
276 | * don't use pci_enable_device(). | |
277 | */ | |
278 | printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n"); | |
fb37fb96 | 279 | for_each_pci_dev(dev) |
1da177e4 | 280 | acpi_pci_irq_enable(dev); |
657472e9 | 281 | } |
1da177e4 | 282 | |
1da177e4 LT |
283 | return 0; |
284 | } |