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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 GH |
9 | struct pci_root_info { |
10 | char *name; | |
11 | unsigned int res_num; | |
12 | struct resource *res; | |
13 | struct pci_bus *bus; | |
14 | int busnum; | |
15 | }; | |
16 | ||
17 | static acpi_status | |
18 | resource_to_addr(struct acpi_resource *resource, | |
19 | struct acpi_resource_address64 *addr) | |
20 | { | |
21 | acpi_status status; | |
22 | ||
23 | status = acpi_resource_to_address64(resource, addr); | |
24 | if (ACPI_SUCCESS(status) && | |
25 | (addr->resource_type == ACPI_MEMORY_RANGE || | |
26 | addr->resource_type == ACPI_IO_RANGE) && | |
27 | addr->address_length > 0 && | |
28 | addr->producer_consumer == ACPI_PRODUCER) { | |
29 | return AE_OK; | |
30 | } | |
31 | return AE_ERROR; | |
32 | } | |
33 | ||
34 | static acpi_status | |
35 | count_resource(struct acpi_resource *acpi_res, void *data) | |
36 | { | |
37 | struct pci_root_info *info = data; | |
38 | struct acpi_resource_address64 addr; | |
39 | acpi_status status; | |
40 | ||
3d9befd2 YL |
41 | if (info->res_num >= PCI_BUS_NUM_RESOURCES) |
42 | return AE_OK; | |
43 | ||
62f420f8 GH |
44 | status = resource_to_addr(acpi_res, &addr); |
45 | if (ACPI_SUCCESS(status)) | |
46 | info->res_num++; | |
47 | return AE_OK; | |
48 | } | |
49 | ||
50 | static acpi_status | |
51 | setup_resource(struct acpi_resource *acpi_res, void *data) | |
52 | { | |
53 | struct pci_root_info *info = data; | |
54 | struct resource *res; | |
55 | struct acpi_resource_address64 addr; | |
56 | acpi_status status; | |
57 | unsigned long flags; | |
58 | struct resource *root; | |
59 | ||
3d9befd2 YL |
60 | if (info->res_num >= PCI_BUS_NUM_RESOURCES) |
61 | return AE_OK; | |
62 | ||
62f420f8 GH |
63 | status = resource_to_addr(acpi_res, &addr); |
64 | if (!ACPI_SUCCESS(status)) | |
65 | return AE_OK; | |
66 | ||
67 | if (addr.resource_type == ACPI_MEMORY_RANGE) { | |
68 | root = &iomem_resource; | |
69 | flags = IORESOURCE_MEM; | |
70 | if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY) | |
71 | flags |= IORESOURCE_PREFETCH; | |
72 | } else if (addr.resource_type == ACPI_IO_RANGE) { | |
73 | root = &ioport_resource; | |
74 | flags = IORESOURCE_IO; | |
75 | } else | |
76 | return AE_OK; | |
77 | ||
78 | res = &info->res[info->res_num]; | |
79 | res->name = info->name; | |
80 | res->flags = flags; | |
81 | res->start = addr.minimum + addr.translation_offset; | |
82 | res->end = res->start + addr.address_length - 1; | |
83 | res->child = NULL; | |
84 | ||
85 | if (insert_resource(root, res)) { | |
86 | printk(KERN_ERR "PCI: Failed to allocate 0x%lx-0x%lx " | |
87 | "from %s for %s\n", (unsigned long) res->start, | |
88 | (unsigned long) res->end, root->name, info->name); | |
89 | } else { | |
90 | info->bus->resource[info->res_num] = res; | |
91 | info->res_num++; | |
92 | } | |
93 | return AE_OK; | |
94 | } | |
95 | ||
96 | static void | |
97 | adjust_transparent_bridge_resources(struct pci_bus *bus) | |
98 | { | |
99 | struct pci_dev *dev; | |
100 | ||
101 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
102 | int i; | |
103 | u16 class = dev->class >> 8; | |
104 | ||
105 | if (class == PCI_CLASS_BRIDGE_PCI && dev->transparent) { | |
106 | for(i = 3; i < PCI_BUS_NUM_RESOURCES; i++) | |
107 | dev->subordinate->resource[i] = | |
108 | dev->bus->resource[i - 3]; | |
109 | } | |
110 | } | |
111 | } | |
112 | ||
113 | static void | |
114 | get_current_resources(struct acpi_device *device, int busnum, | |
cb3576fa | 115 | int domain, struct pci_bus *bus) |
62f420f8 GH |
116 | { |
117 | struct pci_root_info info; | |
118 | size_t size; | |
119 | ||
120 | info.bus = bus; | |
121 | info.res_num = 0; | |
122 | acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource, | |
123 | &info); | |
124 | if (!info.res_num) | |
125 | return; | |
126 | ||
127 | size = sizeof(*info.res) * info.res_num; | |
128 | info.res = kmalloc(size, GFP_KERNEL); | |
129 | if (!info.res) | |
130 | goto res_alloc_fail; | |
131 | ||
cb3576fa | 132 | info.name = kmalloc(16, GFP_KERNEL); |
62f420f8 GH |
133 | if (!info.name) |
134 | goto name_alloc_fail; | |
cb3576fa | 135 | sprintf(info.name, "PCI Bus %04x:%02x", domain, busnum); |
62f420f8 GH |
136 | |
137 | info.res_num = 0; | |
138 | acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource, | |
139 | &info); | |
140 | if (info.res_num) | |
141 | adjust_transparent_bridge_resources(bus); | |
142 | ||
143 | return; | |
144 | ||
145 | name_alloc_fail: | |
146 | kfree(info.res); | |
147 | res_alloc_fail: | |
148 | return; | |
149 | } | |
150 | ||
1da177e4 LT |
151 | struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum) |
152 | { | |
69e1a33f | 153 | struct pci_bus *bus; |
08f1c192 | 154 | struct pci_sysdata *sd; |
871d5f8d YL |
155 | int node; |
156 | #ifdef CONFIG_ACPI_NUMA | |
08f1c192 | 157 | int pxm; |
871d5f8d | 158 | #endif |
08f1c192 | 159 | |
a79e4198 JG |
160 | if (domain && !pci_domains_supported) { |
161 | printk(KERN_WARNING "PCI: Multiple domains not supported " | |
162 | "(dom %d, bus %d)\n", domain, busnum); | |
163 | return NULL; | |
164 | } | |
165 | ||
871d5f8d YL |
166 | node = -1; |
167 | #ifdef CONFIG_ACPI_NUMA | |
168 | pxm = acpi_get_pxm(device->handle); | |
169 | if (pxm >= 0) | |
170 | node = pxm_to_node(pxm); | |
171 | if (node != -1) | |
172 | set_mp_bus_to_node(busnum, node); | |
173 | else | |
871d5f8d | 174 | #endif |
871d5f8d | 175 | node = get_mp_bus_to_node(busnum); |
b755de8d YL |
176 | |
177 | if (node != -1 && !node_online(node)) | |
178 | node = -1; | |
871d5f8d | 179 | |
08f1c192 MBY |
180 | /* Allocate per-root-bus (not per bus) arch-specific data. |
181 | * TODO: leak; this memory is never freed. | |
182 | * It's arguable whether it's worth the trouble to care. | |
183 | */ | |
184 | sd = kzalloc(sizeof(*sd), GFP_KERNEL); | |
185 | if (!sd) { | |
186 | printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum); | |
187 | return NULL; | |
188 | } | |
69e1a33f | 189 | |
a79e4198 | 190 | sd->domain = domain; |
871d5f8d | 191 | sd->node = node; |
b87e81e5 | 192 | /* |
193 | * Maybe the desired pci bus has been already scanned. In such case | |
194 | * it is unnecessary to scan the pci bus with the given domain,busnum. | |
195 | */ | |
196 | bus = pci_find_bus(domain, busnum); | |
197 | if (bus) { | |
198 | /* | |
199 | * If the desired bus exits, the content of bus->sysdata will | |
200 | * be replaced by sd. | |
201 | */ | |
202 | memcpy(bus->sysdata, sd, sizeof(*sd)); | |
203 | kfree(sd); | |
204 | } else | |
205 | bus = pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd); | |
08f1c192 | 206 | |
08f1c192 MBY |
207 | if (!bus) |
208 | kfree(sd); | |
209 | ||
dbb6152e | 210 | if (bus && node != -1) { |
69e1a33f | 211 | #ifdef CONFIG_ACPI_NUMA |
dbb6152e | 212 | if (pxm >= 0) |
0663a362 BH |
213 | printk(KERN_DEBUG |
214 | "pci %04x:%02x: bus on NUMA node %d (pxm %d)\n", | |
215 | domain, busnum, node, pxm); | |
dbb6152e | 216 | #else |
0663a362 BH |
217 | printk(KERN_DEBUG "pci %04x:%02x: bus on NUMA node %d\n", |
218 | domain, busnum, node); | |
69e1a33f | 219 | #endif |
dbb6152e | 220 | } |
62f420f8 GH |
221 | |
222 | if (bus && (pci_probe & PCI_USE__CRS)) | |
cb3576fa | 223 | get_current_resources(device, busnum, domain, bus); |
69e1a33f | 224 | return bus; |
1da177e4 LT |
225 | } |
226 | ||
8dd779b1 | 227 | int __init pci_acpi_init(void) |
1da177e4 LT |
228 | { |
229 | struct pci_dev *dev = NULL; | |
230 | ||
231 | if (pcibios_scanned) | |
232 | return 0; | |
233 | ||
234 | if (acpi_noirq) | |
235 | return 0; | |
236 | ||
237 | printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n"); | |
238 | acpi_irq_penalty_init(); | |
239 | pcibios_scanned++; | |
240 | pcibios_enable_irq = acpi_pci_irq_enable; | |
87bec66b | 241 | pcibios_disable_irq = acpi_pci_irq_disable; |
1da177e4 LT |
242 | |
243 | if (pci_routeirq) { | |
244 | /* | |
245 | * PCI IRQ routing is set up by pci_enable_device(), but we | |
246 | * also do it here in case there are still broken drivers that | |
247 | * don't use pci_enable_device(). | |
248 | */ | |
249 | printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n"); | |
fb37fb96 | 250 | for_each_pci_dev(dev) |
1da177e4 | 251 | acpi_pci_irq_enable(dev); |
657472e9 | 252 | } |
1da177e4 | 253 | |
1da177e4 LT |
254 | return 0; |
255 | } |