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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> |
5a0e3ad6 | 6 | #include <linux/slab.h> |
69e1a33f | 7 | #include <asm/numa.h> |
82487711 | 8 | #include <asm/pci_x86.h> |
1da177e4 | 9 | |
62f420f8 | 10 | struct pci_root_info { |
42887b29 | 11 | struct acpi_device *bridge; |
62f420f8 GH |
12 | char *name; |
13 | unsigned int res_num; | |
14 | struct resource *res; | |
15 | struct pci_bus *bus; | |
16 | int busnum; | |
17 | }; | |
18 | ||
7bc5e3f2 BH |
19 | static bool pci_use_crs = true; |
20 | ||
21 | static int __init set_use_crs(const struct dmi_system_id *id) | |
22 | { | |
23 | pci_use_crs = true; | |
24 | return 0; | |
25 | } | |
26 | ||
27 | static const struct dmi_system_id pci_use_crs_table[] __initconst = { | |
28 | /* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */ | |
29 | { | |
30 | .callback = set_use_crs, | |
31 | .ident = "IBM System x3800", | |
32 | .matches = { | |
33 | DMI_MATCH(DMI_SYS_VENDOR, "IBM"), | |
34 | DMI_MATCH(DMI_PRODUCT_NAME, "x3800"), | |
35 | }, | |
36 | }, | |
37 | {} | |
38 | }; | |
39 | ||
40 | void __init pci_acpi_crs_quirks(void) | |
41 | { | |
42 | int year; | |
43 | ||
44 | if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008) | |
45 | pci_use_crs = false; | |
46 | ||
47 | dmi_check_system(pci_use_crs_table); | |
48 | ||
49 | /* | |
50 | * If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that | |
51 | * takes precedence over anything we figured out above. | |
52 | */ | |
53 | if (pci_probe & PCI_ROOT_NO_CRS) | |
54 | pci_use_crs = false; | |
55 | else if (pci_probe & PCI_USE__CRS) | |
56 | pci_use_crs = true; | |
57 | ||
58 | printk(KERN_INFO "PCI: %s host bridge windows from ACPI; " | |
59 | "if necessary, use \"pci=%s\" and report a bug\n", | |
60 | pci_use_crs ? "Using" : "Ignoring", | |
61 | pci_use_crs ? "nocrs" : "use_crs"); | |
62 | } | |
63 | ||
62f420f8 GH |
64 | static acpi_status |
65 | resource_to_addr(struct acpi_resource *resource, | |
66 | struct acpi_resource_address64 *addr) | |
67 | { | |
68 | acpi_status status; | |
69 | ||
70 | status = acpi_resource_to_address64(resource, addr); | |
71 | if (ACPI_SUCCESS(status) && | |
72 | (addr->resource_type == ACPI_MEMORY_RANGE || | |
73 | addr->resource_type == ACPI_IO_RANGE) && | |
74 | addr->address_length > 0 && | |
75 | addr->producer_consumer == ACPI_PRODUCER) { | |
76 | return AE_OK; | |
77 | } | |
78 | return AE_ERROR; | |
79 | } | |
80 | ||
81 | static acpi_status | |
82 | count_resource(struct acpi_resource *acpi_res, void *data) | |
83 | { | |
84 | struct pci_root_info *info = data; | |
85 | struct acpi_resource_address64 addr; | |
86 | acpi_status status; | |
87 | ||
88 | status = resource_to_addr(acpi_res, &addr); | |
89 | if (ACPI_SUCCESS(status)) | |
90 | info->res_num++; | |
91 | return AE_OK; | |
92 | } | |
93 | ||
03db42ad BH |
94 | static void |
95 | align_resource(struct acpi_device *bridge, struct resource *res) | |
96 | { | |
97 | int align = (res->flags & IORESOURCE_MEM) ? 16 : 4; | |
98 | ||
99 | /* | |
100 | * Host bridge windows are not BARs, but the decoders on the PCI side | |
101 | * that claim this address space have starting alignment and length | |
102 | * constraints, so fix any obvious BIOS goofs. | |
103 | */ | |
ea7f1b6e | 104 | if (!IS_ALIGNED(res->start, align)) { |
03db42ad BH |
105 | dev_printk(KERN_DEBUG, &bridge->dev, |
106 | "host bridge window %pR invalid; " | |
107 | "aligning start to %d-byte boundary\n", res, align); | |
108 | res->start &= ~(align - 1); | |
109 | } | |
ea7f1b6e | 110 | if (!IS_ALIGNED(res->end + 1, align)) { |
03db42ad BH |
111 | dev_printk(KERN_DEBUG, &bridge->dev, |
112 | "host bridge window %pR invalid; " | |
113 | "aligning end to %d-byte boundary\n", res, align); | |
ea7f1b6e | 114 | res->end = ALIGN(res->end, align) - 1; |
03db42ad BH |
115 | } |
116 | } | |
117 | ||
62f420f8 GH |
118 | static acpi_status |
119 | setup_resource(struct acpi_resource *acpi_res, void *data) | |
120 | { | |
121 | struct pci_root_info *info = data; | |
122 | struct resource *res; | |
123 | struct acpi_resource_address64 addr; | |
124 | acpi_status status; | |
125 | unsigned long flags; | |
eb9fc8ef | 126 | struct resource *root, *conflict; |
d558b483 | 127 | u64 start, end, max_len; |
2cdb3f1d | 128 | |
62f420f8 GH |
129 | status = resource_to_addr(acpi_res, &addr); |
130 | if (!ACPI_SUCCESS(status)) | |
131 | return AE_OK; | |
132 | ||
133 | if (addr.resource_type == ACPI_MEMORY_RANGE) { | |
134 | root = &iomem_resource; | |
135 | flags = IORESOURCE_MEM; | |
136 | if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY) | |
137 | flags |= IORESOURCE_PREFETCH; | |
138 | } else if (addr.resource_type == ACPI_IO_RANGE) { | |
139 | root = &ioport_resource; | |
140 | flags = IORESOURCE_IO; | |
141 | } else | |
142 | return AE_OK; | |
143 | ||
d558b483 BH |
144 | max_len = addr.maximum - addr.minimum + 1; |
145 | if (addr.address_length > max_len) { | |
146 | dev_printk(KERN_DEBUG, &info->bridge->dev, | |
147 | "host bridge window length %#llx doesn't fit in " | |
148 | "%#llx-%#llx, trimming\n", | |
149 | (unsigned long long) addr.address_length, | |
150 | (unsigned long long) addr.minimum, | |
151 | (unsigned long long) addr.maximum); | |
152 | addr.address_length = max_len; | |
153 | } | |
154 | ||
2cdb3f1d YL |
155 | start = addr.minimum + addr.translation_offset; |
156 | end = start + addr.address_length - 1; | |
f9cde5ff | 157 | |
2cdb3f1d YL |
158 | res = &info->res[info->res_num]; |
159 | res->name = info->name; | |
160 | res->flags = flags; | |
161 | res->start = start; | |
162 | res->end = end; | |
163 | res->child = NULL; | |
03db42ad | 164 | align_resource(info->bridge, res); |
2cdb3f1d | 165 | |
7bc5e3f2 | 166 | if (!pci_use_crs) { |
f1db6fde BH |
167 | dev_printk(KERN_DEBUG, &info->bridge->dev, |
168 | "host bridge window %pR (ignored)\n", res); | |
169 | return AE_OK; | |
170 | } | |
171 | ||
eb9fc8ef BH |
172 | conflict = insert_resource_conflict(root, res); |
173 | if (conflict) { | |
c7dabef8 | 174 | dev_err(&info->bridge->dev, |
eb9fc8ef BH |
175 | "address space collision: host bridge window %pR " |
176 | "conflicts with %s %pR\n", | |
177 | res, conflict->name, conflict); | |
62f420f8 | 178 | } else { |
2fe2abf8 | 179 | pci_bus_add_resource(info->bus, res, 0); |
62f420f8 | 180 | info->res_num++; |
42887b29 | 181 | if (addr.translation_offset) |
c7dabef8 | 182 | dev_info(&info->bridge->dev, "host bridge window %pR " |
42887b29 BH |
183 | "(PCI address [%#llx-%#llx])\n", |
184 | res, res->start - addr.translation_offset, | |
185 | res->end - addr.translation_offset); | |
186 | else | |
187 | dev_info(&info->bridge->dev, | |
c7dabef8 | 188 | "host bridge window %pR\n", res); |
62f420f8 GH |
189 | } |
190 | return AE_OK; | |
191 | } | |
192 | ||
62f420f8 GH |
193 | static void |
194 | get_current_resources(struct acpi_device *device, int busnum, | |
cb3576fa | 195 | int domain, struct pci_bus *bus) |
62f420f8 GH |
196 | { |
197 | struct pci_root_info info; | |
198 | size_t size; | |
199 | ||
7bc5e3f2 | 200 | if (pci_use_crs) |
2fe2abf8 | 201 | pci_bus_remove_resources(bus); |
f1db6fde | 202 | |
42887b29 | 203 | info.bridge = device; |
62f420f8 GH |
204 | info.bus = bus; |
205 | info.res_num = 0; | |
206 | acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource, | |
207 | &info); | |
208 | if (!info.res_num) | |
209 | return; | |
210 | ||
211 | size = sizeof(*info.res) * info.res_num; | |
212 | info.res = kmalloc(size, GFP_KERNEL); | |
213 | if (!info.res) | |
214 | goto res_alloc_fail; | |
215 | ||
cb3576fa | 216 | info.name = kmalloc(16, GFP_KERNEL); |
62f420f8 GH |
217 | if (!info.name) |
218 | goto name_alloc_fail; | |
cb3576fa | 219 | sprintf(info.name, "PCI Bus %04x:%02x", domain, busnum); |
62f420f8 GH |
220 | |
221 | info.res_num = 0; | |
222 | acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource, | |
223 | &info); | |
62f420f8 GH |
224 | |
225 | return; | |
226 | ||
227 | name_alloc_fail: | |
228 | kfree(info.res); | |
229 | res_alloc_fail: | |
230 | return; | |
231 | } | |
232 | ||
1da177e4 LT |
233 | struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum) |
234 | { | |
69e1a33f | 235 | struct pci_bus *bus; |
08f1c192 | 236 | struct pci_sysdata *sd; |
871d5f8d YL |
237 | int node; |
238 | #ifdef CONFIG_ACPI_NUMA | |
08f1c192 | 239 | int pxm; |
871d5f8d | 240 | #endif |
08f1c192 | 241 | |
a79e4198 | 242 | if (domain && !pci_domains_supported) { |
2a6bed83 BH |
243 | printk(KERN_WARNING "pci_bus %04x:%02x: " |
244 | "ignored (multiple domains not supported)\n", | |
245 | domain, busnum); | |
a79e4198 JG |
246 | return NULL; |
247 | } | |
248 | ||
871d5f8d YL |
249 | node = -1; |
250 | #ifdef CONFIG_ACPI_NUMA | |
251 | pxm = acpi_get_pxm(device->handle); | |
252 | if (pxm >= 0) | |
253 | node = pxm_to_node(pxm); | |
254 | if (node != -1) | |
255 | set_mp_bus_to_node(busnum, node); | |
256 | else | |
871d5f8d | 257 | #endif |
871d5f8d | 258 | node = get_mp_bus_to_node(busnum); |
b755de8d YL |
259 | |
260 | if (node != -1 && !node_online(node)) | |
261 | node = -1; | |
871d5f8d | 262 | |
08f1c192 MBY |
263 | /* Allocate per-root-bus (not per bus) arch-specific data. |
264 | * TODO: leak; this memory is never freed. | |
265 | * It's arguable whether it's worth the trouble to care. | |
266 | */ | |
267 | sd = kzalloc(sizeof(*sd), GFP_KERNEL); | |
268 | if (!sd) { | |
2a6bed83 BH |
269 | printk(KERN_WARNING "pci_bus %04x:%02x: " |
270 | "ignored (out of memory)\n", domain, busnum); | |
08f1c192 MBY |
271 | return NULL; |
272 | } | |
69e1a33f | 273 | |
a79e4198 | 274 | sd->domain = domain; |
871d5f8d | 275 | sd->node = node; |
b87e81e5 | 276 | /* |
277 | * Maybe the desired pci bus has been already scanned. In such case | |
278 | * it is unnecessary to scan the pci bus with the given domain,busnum. | |
279 | */ | |
280 | bus = pci_find_bus(domain, busnum); | |
281 | if (bus) { | |
282 | /* | |
283 | * If the desired bus exits, the content of bus->sysdata will | |
284 | * be replaced by sd. | |
285 | */ | |
286 | memcpy(bus->sysdata, sd, sizeof(*sd)); | |
287 | kfree(sd); | |
626fdfec YL |
288 | } else { |
289 | bus = pci_create_bus(NULL, busnum, &pci_root_ops, sd); | |
290 | if (bus) { | |
f1db6fde | 291 | get_current_resources(device, busnum, domain, bus); |
626fdfec YL |
292 | bus->subordinate = pci_scan_child_bus(bus); |
293 | } | |
294 | } | |
08f1c192 | 295 | |
08f1c192 MBY |
296 | if (!bus) |
297 | kfree(sd); | |
298 | ||
dbb6152e | 299 | if (bus && node != -1) { |
69e1a33f | 300 | #ifdef CONFIG_ACPI_NUMA |
dbb6152e | 301 | if (pxm >= 0) |
2b8c2efe BH |
302 | dev_printk(KERN_DEBUG, &bus->dev, |
303 | "on NUMA node %d (pxm %d)\n", node, pxm); | |
dbb6152e | 304 | #else |
2b8c2efe | 305 | dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node); |
69e1a33f | 306 | #endif |
dbb6152e | 307 | } |
62f420f8 | 308 | |
69e1a33f | 309 | return bus; |
1da177e4 LT |
310 | } |
311 | ||
8dd779b1 | 312 | int __init pci_acpi_init(void) |
1da177e4 LT |
313 | { |
314 | struct pci_dev *dev = NULL; | |
315 | ||
1da177e4 | 316 | if (acpi_noirq) |
b72d0db9 | 317 | return -ENODEV; |
1da177e4 LT |
318 | |
319 | printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n"); | |
320 | acpi_irq_penalty_init(); | |
1da177e4 | 321 | pcibios_enable_irq = acpi_pci_irq_enable; |
87bec66b | 322 | pcibios_disable_irq = acpi_pci_irq_disable; |
ab3b3793 | 323 | x86_init.pci.init_irq = x86_init_noop; |
1da177e4 LT |
324 | |
325 | if (pci_routeirq) { | |
326 | /* | |
327 | * PCI IRQ routing is set up by pci_enable_device(), but we | |
328 | * also do it here in case there are still broken drivers that | |
329 | * don't use pci_enable_device(). | |
330 | */ | |
331 | printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n"); | |
fb37fb96 | 332 | for_each_pci_dev(dev) |
1da177e4 | 333 | acpi_pci_irq_enable(dev); |
657472e9 | 334 | } |
1da177e4 | 335 | |
1da177e4 LT |
336 | return 0; |
337 | } |