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 | ||
7bc5e3f2 BH |
18 | static bool pci_use_crs = true; |
19 | ||
20 | static int __init set_use_crs(const struct dmi_system_id *id) | |
21 | { | |
22 | pci_use_crs = true; | |
23 | return 0; | |
24 | } | |
25 | ||
26 | static const struct dmi_system_id pci_use_crs_table[] __initconst = { | |
27 | /* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */ | |
28 | { | |
29 | .callback = set_use_crs, | |
30 | .ident = "IBM System x3800", | |
31 | .matches = { | |
32 | DMI_MATCH(DMI_SYS_VENDOR, "IBM"), | |
33 | DMI_MATCH(DMI_PRODUCT_NAME, "x3800"), | |
34 | }, | |
35 | }, | |
36 | {} | |
37 | }; | |
38 | ||
39 | void __init pci_acpi_crs_quirks(void) | |
40 | { | |
41 | int year; | |
42 | ||
43 | if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008) | |
44 | pci_use_crs = false; | |
45 | ||
46 | dmi_check_system(pci_use_crs_table); | |
47 | ||
48 | /* | |
49 | * If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that | |
50 | * takes precedence over anything we figured out above. | |
51 | */ | |
52 | if (pci_probe & PCI_ROOT_NO_CRS) | |
53 | pci_use_crs = false; | |
54 | else if (pci_probe & PCI_USE__CRS) | |
55 | pci_use_crs = true; | |
56 | ||
57 | printk(KERN_INFO "PCI: %s host bridge windows from ACPI; " | |
58 | "if necessary, use \"pci=%s\" and report a bug\n", | |
59 | pci_use_crs ? "Using" : "Ignoring", | |
60 | pci_use_crs ? "nocrs" : "use_crs"); | |
61 | } | |
62 | ||
62f420f8 GH |
63 | static acpi_status |
64 | resource_to_addr(struct acpi_resource *resource, | |
65 | struct acpi_resource_address64 *addr) | |
66 | { | |
67 | acpi_status status; | |
68 | ||
69 | status = acpi_resource_to_address64(resource, addr); | |
70 | if (ACPI_SUCCESS(status) && | |
71 | (addr->resource_type == ACPI_MEMORY_RANGE || | |
72 | addr->resource_type == ACPI_IO_RANGE) && | |
73 | addr->address_length > 0 && | |
74 | addr->producer_consumer == ACPI_PRODUCER) { | |
75 | return AE_OK; | |
76 | } | |
77 | return AE_ERROR; | |
78 | } | |
79 | ||
80 | static acpi_status | |
81 | count_resource(struct acpi_resource *acpi_res, void *data) | |
82 | { | |
83 | struct pci_root_info *info = data; | |
84 | struct acpi_resource_address64 addr; | |
85 | acpi_status status; | |
86 | ||
87 | status = resource_to_addr(acpi_res, &addr); | |
88 | if (ACPI_SUCCESS(status)) | |
89 | info->res_num++; | |
90 | return AE_OK; | |
91 | } | |
92 | ||
03db42ad BH |
93 | static void |
94 | align_resource(struct acpi_device *bridge, struct resource *res) | |
95 | { | |
96 | int align = (res->flags & IORESOURCE_MEM) ? 16 : 4; | |
97 | ||
98 | /* | |
99 | * Host bridge windows are not BARs, but the decoders on the PCI side | |
100 | * that claim this address space have starting alignment and length | |
101 | * constraints, so fix any obvious BIOS goofs. | |
102 | */ | |
ea7f1b6e | 103 | if (!IS_ALIGNED(res->start, align)) { |
03db42ad BH |
104 | dev_printk(KERN_DEBUG, &bridge->dev, |
105 | "host bridge window %pR invalid; " | |
106 | "aligning start to %d-byte boundary\n", res, align); | |
107 | res->start &= ~(align - 1); | |
108 | } | |
ea7f1b6e | 109 | if (!IS_ALIGNED(res->end + 1, align)) { |
03db42ad BH |
110 | dev_printk(KERN_DEBUG, &bridge->dev, |
111 | "host bridge window %pR invalid; " | |
112 | "aligning end to %d-byte boundary\n", res, align); | |
ea7f1b6e | 113 | res->end = ALIGN(res->end, align) - 1; |
03db42ad BH |
114 | } |
115 | } | |
116 | ||
62f420f8 GH |
117 | static acpi_status |
118 | setup_resource(struct acpi_resource *acpi_res, void *data) | |
119 | { | |
120 | struct pci_root_info *info = data; | |
121 | struct resource *res; | |
122 | struct acpi_resource_address64 addr; | |
123 | acpi_status status; | |
124 | unsigned long flags; | |
125 | struct resource *root; | |
2cdb3f1d YL |
126 | u64 start, end; |
127 | ||
62f420f8 GH |
128 | status = resource_to_addr(acpi_res, &addr); |
129 | if (!ACPI_SUCCESS(status)) | |
130 | return AE_OK; | |
131 | ||
132 | if (addr.resource_type == ACPI_MEMORY_RANGE) { | |
133 | root = &iomem_resource; | |
134 | flags = IORESOURCE_MEM; | |
135 | if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY) | |
136 | flags |= IORESOURCE_PREFETCH; | |
137 | } else if (addr.resource_type == ACPI_IO_RANGE) { | |
138 | root = &ioport_resource; | |
139 | flags = IORESOURCE_IO; | |
140 | } else | |
141 | return AE_OK; | |
142 | ||
2cdb3f1d YL |
143 | start = addr.minimum + addr.translation_offset; |
144 | end = start + addr.address_length - 1; | |
f9cde5ff | 145 | |
2cdb3f1d YL |
146 | res = &info->res[info->res_num]; |
147 | res->name = info->name; | |
148 | res->flags = flags; | |
149 | res->start = start; | |
150 | res->end = end; | |
151 | res->child = NULL; | |
03db42ad | 152 | align_resource(info->bridge, res); |
2cdb3f1d | 153 | |
7bc5e3f2 | 154 | if (!pci_use_crs) { |
f1db6fde BH |
155 | dev_printk(KERN_DEBUG, &info->bridge->dev, |
156 | "host bridge window %pR (ignored)\n", res); | |
157 | return AE_OK; | |
158 | } | |
159 | ||
62f420f8 | 160 | if (insert_resource(root, res)) { |
c7dabef8 BH |
161 | dev_err(&info->bridge->dev, |
162 | "can't allocate host bridge window %pR\n", res); | |
62f420f8 | 163 | } else { |
2fe2abf8 | 164 | pci_bus_add_resource(info->bus, res, 0); |
62f420f8 | 165 | info->res_num++; |
42887b29 | 166 | if (addr.translation_offset) |
c7dabef8 | 167 | dev_info(&info->bridge->dev, "host bridge window %pR " |
42887b29 BH |
168 | "(PCI address [%#llx-%#llx])\n", |
169 | res, res->start - addr.translation_offset, | |
170 | res->end - addr.translation_offset); | |
171 | else | |
172 | dev_info(&info->bridge->dev, | |
c7dabef8 | 173 | "host bridge window %pR\n", res); |
62f420f8 GH |
174 | } |
175 | return AE_OK; | |
176 | } | |
177 | ||
62f420f8 GH |
178 | static void |
179 | get_current_resources(struct acpi_device *device, int busnum, | |
cb3576fa | 180 | int domain, struct pci_bus *bus) |
62f420f8 GH |
181 | { |
182 | struct pci_root_info info; | |
183 | size_t size; | |
184 | ||
7bc5e3f2 | 185 | if (pci_use_crs) |
2fe2abf8 | 186 | pci_bus_remove_resources(bus); |
f1db6fde | 187 | |
42887b29 | 188 | info.bridge = device; |
62f420f8 GH |
189 | info.bus = bus; |
190 | info.res_num = 0; | |
191 | acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource, | |
192 | &info); | |
193 | if (!info.res_num) | |
194 | return; | |
195 | ||
196 | size = sizeof(*info.res) * info.res_num; | |
197 | info.res = kmalloc(size, GFP_KERNEL); | |
198 | if (!info.res) | |
199 | goto res_alloc_fail; | |
200 | ||
cb3576fa | 201 | info.name = kmalloc(16, GFP_KERNEL); |
62f420f8 GH |
202 | if (!info.name) |
203 | goto name_alloc_fail; | |
cb3576fa | 204 | sprintf(info.name, "PCI Bus %04x:%02x", domain, busnum); |
62f420f8 GH |
205 | |
206 | info.res_num = 0; | |
207 | acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource, | |
208 | &info); | |
62f420f8 GH |
209 | |
210 | return; | |
211 | ||
212 | name_alloc_fail: | |
213 | kfree(info.res); | |
214 | res_alloc_fail: | |
215 | return; | |
216 | } | |
217 | ||
1da177e4 LT |
218 | struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum) |
219 | { | |
69e1a33f | 220 | struct pci_bus *bus; |
08f1c192 | 221 | struct pci_sysdata *sd; |
871d5f8d YL |
222 | int node; |
223 | #ifdef CONFIG_ACPI_NUMA | |
08f1c192 | 224 | int pxm; |
871d5f8d | 225 | #endif |
08f1c192 | 226 | |
a79e4198 | 227 | if (domain && !pci_domains_supported) { |
2a6bed83 BH |
228 | printk(KERN_WARNING "pci_bus %04x:%02x: " |
229 | "ignored (multiple domains not supported)\n", | |
230 | domain, busnum); | |
a79e4198 JG |
231 | return NULL; |
232 | } | |
233 | ||
871d5f8d YL |
234 | node = -1; |
235 | #ifdef CONFIG_ACPI_NUMA | |
236 | pxm = acpi_get_pxm(device->handle); | |
237 | if (pxm >= 0) | |
238 | node = pxm_to_node(pxm); | |
239 | if (node != -1) | |
240 | set_mp_bus_to_node(busnum, node); | |
241 | else | |
871d5f8d | 242 | #endif |
871d5f8d | 243 | node = get_mp_bus_to_node(busnum); |
b755de8d YL |
244 | |
245 | if (node != -1 && !node_online(node)) | |
246 | node = -1; | |
871d5f8d | 247 | |
08f1c192 MBY |
248 | /* Allocate per-root-bus (not per bus) arch-specific data. |
249 | * TODO: leak; this memory is never freed. | |
250 | * It's arguable whether it's worth the trouble to care. | |
251 | */ | |
252 | sd = kzalloc(sizeof(*sd), GFP_KERNEL); | |
253 | if (!sd) { | |
2a6bed83 BH |
254 | printk(KERN_WARNING "pci_bus %04x:%02x: " |
255 | "ignored (out of memory)\n", domain, busnum); | |
08f1c192 MBY |
256 | return NULL; |
257 | } | |
69e1a33f | 258 | |
a79e4198 | 259 | sd->domain = domain; |
871d5f8d | 260 | sd->node = node; |
b87e81e5 | 261 | /* |
262 | * Maybe the desired pci bus has been already scanned. In such case | |
263 | * it is unnecessary to scan the pci bus with the given domain,busnum. | |
264 | */ | |
265 | bus = pci_find_bus(domain, busnum); | |
266 | if (bus) { | |
267 | /* | |
268 | * If the desired bus exits, the content of bus->sysdata will | |
269 | * be replaced by sd. | |
270 | */ | |
271 | memcpy(bus->sysdata, sd, sizeof(*sd)); | |
272 | kfree(sd); | |
626fdfec YL |
273 | } else { |
274 | bus = pci_create_bus(NULL, busnum, &pci_root_ops, sd); | |
275 | if (bus) { | |
f1db6fde | 276 | get_current_resources(device, busnum, domain, bus); |
626fdfec YL |
277 | bus->subordinate = pci_scan_child_bus(bus); |
278 | } | |
279 | } | |
08f1c192 | 280 | |
08f1c192 MBY |
281 | if (!bus) |
282 | kfree(sd); | |
283 | ||
dbb6152e | 284 | if (bus && node != -1) { |
69e1a33f | 285 | #ifdef CONFIG_ACPI_NUMA |
dbb6152e | 286 | if (pxm >= 0) |
2b8c2efe BH |
287 | dev_printk(KERN_DEBUG, &bus->dev, |
288 | "on NUMA node %d (pxm %d)\n", node, pxm); | |
dbb6152e | 289 | #else |
2b8c2efe | 290 | dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node); |
69e1a33f | 291 | #endif |
dbb6152e | 292 | } |
62f420f8 | 293 | |
69e1a33f | 294 | return bus; |
1da177e4 LT |
295 | } |
296 | ||
8dd779b1 | 297 | int __init pci_acpi_init(void) |
1da177e4 LT |
298 | { |
299 | struct pci_dev *dev = NULL; | |
300 | ||
301 | if (pcibios_scanned) | |
302 | return 0; | |
303 | ||
304 | if (acpi_noirq) | |
305 | return 0; | |
306 | ||
307 | printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n"); | |
308 | acpi_irq_penalty_init(); | |
309 | pcibios_scanned++; | |
310 | pcibios_enable_irq = acpi_pci_irq_enable; | |
87bec66b | 311 | pcibios_disable_irq = acpi_pci_irq_disable; |
1da177e4 LT |
312 | |
313 | if (pci_routeirq) { | |
314 | /* | |
315 | * PCI IRQ routing is set up by pci_enable_device(), but we | |
316 | * also do it here in case there are still broken drivers that | |
317 | * don't use pci_enable_device(). | |
318 | */ | |
319 | printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n"); | |
fb37fb96 | 320 | for_each_pci_dev(dev) |
1da177e4 | 321 | acpi_pci_irq_enable(dev); |
657472e9 | 322 | } |
1da177e4 | 323 | |
1da177e4 LT |
324 | return 0; |
325 | } |