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1#include <linux/pci.h>
2#include <linux/acpi.h>
3#include <linux/init.h>
4#include <linux/irq.h>
5#include <linux/dmi.h>
6#include <linux/slab.h>
7#include <asm/numa.h>
8#include <asm/pci_x86.h>
9
10struct pci_root_info {
11 struct acpi_device *bridge;
12 char *name;
13 unsigned int res_num;
14 struct resource *res;
15 struct pci_bus *bus;
16 int busnum;
17};
18
19static bool pci_use_crs = true;
20
21static int __init set_use_crs(const struct dmi_system_id *id)
22{
23 pci_use_crs = true;
24 return 0;
25}
26
27static 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 /* https://bugzilla.kernel.org/show_bug.cgi?id=16007 */
38 /* 2006 AMD HT/VIA system with two host bridges */
39 {
40 .callback = set_use_crs,
41 .ident = "ASRock ALiveSATA2-GLAN",
42 .matches = {
43 DMI_MATCH(DMI_PRODUCT_NAME, "ALiveSATA2-GLAN"),
44 },
45 },
46 /* https://bugzilla.kernel.org/show_bug.cgi?id=30552 */
47 /* 2006 AMD HT/VIA system with two host bridges */
48 {
49 .callback = set_use_crs,
50 .ident = "ASUS M2V-MX SE",
51 .matches = {
52 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
53 DMI_MATCH(DMI_BOARD_NAME, "M2V-MX SE"),
54 DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
55 },
56 },
57 {}
58};
59
60void __init pci_acpi_crs_quirks(void)
61{
62 int year;
63
64 if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008)
65 pci_use_crs = false;
66
67 dmi_check_system(pci_use_crs_table);
68
69 /*
70 * If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that
71 * takes precedence over anything we figured out above.
72 */
73 if (pci_probe & PCI_ROOT_NO_CRS)
74 pci_use_crs = false;
75 else if (pci_probe & PCI_USE__CRS)
76 pci_use_crs = true;
77
78 printk(KERN_INFO "PCI: %s host bridge windows from ACPI; "
79 "if necessary, use \"pci=%s\" and report a bug\n",
80 pci_use_crs ? "Using" : "Ignoring",
81 pci_use_crs ? "nocrs" : "use_crs");
82}
83
84static acpi_status
85resource_to_addr(struct acpi_resource *resource,
86 struct acpi_resource_address64 *addr)
87{
88 acpi_status status;
89 struct acpi_resource_memory24 *memory24;
90 struct acpi_resource_memory32 *memory32;
91 struct acpi_resource_fixed_memory32 *fixed_memory32;
92
93 memset(addr, 0, sizeof(*addr));
94 switch (resource->type) {
95 case ACPI_RESOURCE_TYPE_MEMORY24:
96 memory24 = &resource->data.memory24;
97 addr->resource_type = ACPI_MEMORY_RANGE;
98 addr->minimum = memory24->minimum;
99 addr->address_length = memory24->address_length;
100 addr->maximum = addr->minimum + addr->address_length - 1;
101 return AE_OK;
102 case ACPI_RESOURCE_TYPE_MEMORY32:
103 memory32 = &resource->data.memory32;
104 addr->resource_type = ACPI_MEMORY_RANGE;
105 addr->minimum = memory32->minimum;
106 addr->address_length = memory32->address_length;
107 addr->maximum = addr->minimum + addr->address_length - 1;
108 return AE_OK;
109 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
110 fixed_memory32 = &resource->data.fixed_memory32;
111 addr->resource_type = ACPI_MEMORY_RANGE;
112 addr->minimum = fixed_memory32->address;
113 addr->address_length = fixed_memory32->address_length;
114 addr->maximum = addr->minimum + addr->address_length - 1;
115 return AE_OK;
116 case ACPI_RESOURCE_TYPE_ADDRESS16:
117 case ACPI_RESOURCE_TYPE_ADDRESS32:
118 case ACPI_RESOURCE_TYPE_ADDRESS64:
119 status = acpi_resource_to_address64(resource, addr);
120 if (ACPI_SUCCESS(status) &&
121 (addr->resource_type == ACPI_MEMORY_RANGE ||
122 addr->resource_type == ACPI_IO_RANGE) &&
123 addr->address_length > 0) {
124 return AE_OK;
125 }
126 break;
127 }
128 return AE_ERROR;
129}
130
131static acpi_status
132count_resource(struct acpi_resource *acpi_res, void *data)
133{
134 struct pci_root_info *info = data;
135 struct acpi_resource_address64 addr;
136 acpi_status status;
137
138 status = resource_to_addr(acpi_res, &addr);
139 if (ACPI_SUCCESS(status))
140 info->res_num++;
141 return AE_OK;
142}
143
144static acpi_status
145setup_resource(struct acpi_resource *acpi_res, void *data)
146{
147 struct pci_root_info *info = data;
148 struct resource *res;
149 struct acpi_resource_address64 addr;
150 acpi_status status;
151 unsigned long flags;
152 u64 start, end;
153
154 status = resource_to_addr(acpi_res, &addr);
155 if (!ACPI_SUCCESS(status))
156 return AE_OK;
157
158 if (addr.resource_type == ACPI_MEMORY_RANGE) {
159 flags = IORESOURCE_MEM;
160 if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
161 flags |= IORESOURCE_PREFETCH;
162 } else if (addr.resource_type == ACPI_IO_RANGE) {
163 flags = IORESOURCE_IO;
164 } else
165 return AE_OK;
166
167 start = addr.minimum + addr.translation_offset;
168 end = addr.maximum + addr.translation_offset;
169
170 res = &info->res[info->res_num];
171 res->name = info->name;
172 res->flags = flags;
173 res->start = start;
174 res->end = end;
175 res->child = NULL;
176
177 if (!pci_use_crs) {
178 dev_printk(KERN_DEBUG, &info->bridge->dev,
179 "host bridge window %pR (ignored)\n", res);
180 return AE_OK;
181 }
182
183 info->res_num++;
184 if (addr.translation_offset)
185 dev_info(&info->bridge->dev, "host bridge window %pR "
186 "(PCI address [%#llx-%#llx])\n",
187 res, res->start - addr.translation_offset,
188 res->end - addr.translation_offset);
189 else
190 dev_info(&info->bridge->dev, "host bridge window %pR\n", res);
191
192 return AE_OK;
193}
194
195static bool resource_contains(struct resource *res, resource_size_t point)
196{
197 if (res->start <= point && point <= res->end)
198 return true;
199 return false;
200}
201
202static void coalesce_windows(struct pci_root_info *info, unsigned long type)
203{
204 int i, j;
205 struct resource *res1, *res2;
206
207 for (i = 0; i < info->res_num; i++) {
208 res1 = &info->res[i];
209 if (!(res1->flags & type))
210 continue;
211
212 for (j = i + 1; j < info->res_num; j++) {
213 res2 = &info->res[j];
214 if (!(res2->flags & type))
215 continue;
216
217 /*
218 * I don't like throwing away windows because then
219 * our resources no longer match the ACPI _CRS, but
220 * the kernel resource tree doesn't allow overlaps.
221 */
222 if (resource_contains(res1, res2->start) ||
223 resource_contains(res1, res2->end) ||
224 resource_contains(res2, res1->start) ||
225 resource_contains(res2, res1->end)) {
226 res1->start = min(res1->start, res2->start);
227 res1->end = max(res1->end, res2->end);
228 dev_info(&info->bridge->dev,
229 "host bridge window expanded to %pR; %pR ignored\n",
230 res1, res2);
231 res2->flags = 0;
232 }
233 }
234 }
235}
236
237static void add_resources(struct pci_root_info *info)
238{
239 int i;
240 struct resource *res, *root, *conflict;
241
242 if (!pci_use_crs)
243 return;
244
245 coalesce_windows(info, IORESOURCE_MEM);
246 coalesce_windows(info, IORESOURCE_IO);
247
248 for (i = 0; i < info->res_num; i++) {
249 res = &info->res[i];
250
251 if (res->flags & IORESOURCE_MEM)
252 root = &iomem_resource;
253 else if (res->flags & IORESOURCE_IO)
254 root = &ioport_resource;
255 else
256 continue;
257
258 conflict = insert_resource_conflict(root, res);
259 if (conflict)
260 dev_info(&info->bridge->dev,
261 "ignoring host bridge window %pR (conflicts with %s %pR)\n",
262 res, conflict->name, conflict);
263 else
264 pci_bus_add_resource(info->bus, res, 0);
265 }
266}
267
268static void
269get_current_resources(struct acpi_device *device, int busnum,
270 int domain, struct pci_bus *bus)
271{
272 struct pci_root_info info;
273 size_t size;
274
275 if (pci_use_crs)
276 pci_bus_remove_resources(bus);
277
278 info.bridge = device;
279 info.bus = bus;
280 info.res_num = 0;
281 acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
282 &info);
283 if (!info.res_num)
284 return;
285
286 size = sizeof(*info.res) * info.res_num;
287 info.res = kmalloc(size, GFP_KERNEL);
288 if (!info.res)
289 goto res_alloc_fail;
290
291 info.name = kasprintf(GFP_KERNEL, "PCI Bus %04x:%02x", domain, busnum);
292 if (!info.name)
293 goto name_alloc_fail;
294
295 info.res_num = 0;
296 acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
297 &info);
298
299 add_resources(&info);
300 return;
301
302name_alloc_fail:
303 kfree(info.res);
304res_alloc_fail:
305 return;
306}
307
308struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
309{
310 struct acpi_device *device = root->device;
311 int domain = root->segment;
312 int busnum = root->secondary.start;
313 struct pci_bus *bus;
314 struct pci_sysdata *sd;
315 int node;
316#ifdef CONFIG_ACPI_NUMA
317 int pxm;
318#endif
319
320 if (domain && !pci_domains_supported) {
321 printk(KERN_WARNING "pci_bus %04x:%02x: "
322 "ignored (multiple domains not supported)\n",
323 domain, busnum);
324 return NULL;
325 }
326
327 node = -1;
328#ifdef CONFIG_ACPI_NUMA
329 pxm = acpi_get_pxm(device->handle);
330 if (pxm >= 0)
331 node = pxm_to_node(pxm);
332 if (node != -1)
333 set_mp_bus_to_node(busnum, node);
334 else
335#endif
336 node = get_mp_bus_to_node(busnum);
337
338 if (node != -1 && !node_online(node))
339 node = -1;
340
341 /* Allocate per-root-bus (not per bus) arch-specific data.
342 * TODO: leak; this memory is never freed.
343 * It's arguable whether it's worth the trouble to care.
344 */
345 sd = kzalloc(sizeof(*sd), GFP_KERNEL);
346 if (!sd) {
347 printk(KERN_WARNING "pci_bus %04x:%02x: "
348 "ignored (out of memory)\n", domain, busnum);
349 return NULL;
350 }
351
352 sd->domain = domain;
353 sd->node = node;
354 /*
355 * Maybe the desired pci bus has been already scanned. In such case
356 * it is unnecessary to scan the pci bus with the given domain,busnum.
357 */
358 bus = pci_find_bus(domain, busnum);
359 if (bus) {
360 /*
361 * If the desired bus exits, the content of bus->sysdata will
362 * be replaced by sd.
363 */
364 memcpy(bus->sysdata, sd, sizeof(*sd));
365 kfree(sd);
366 } else {
367 bus = pci_create_bus(NULL, busnum, &pci_root_ops, sd);
368 if (bus) {
369 get_current_resources(device, busnum, domain, bus);
370 bus->subordinate = pci_scan_child_bus(bus);
371 }
372 }
373
374 /* After the PCI-E bus has been walked and all devices discovered,
375 * configure any settings of the fabric that might be necessary.
376 */
377 if (bus) {
378 struct pci_bus *child;
379 list_for_each_entry(child, &bus->children, node) {
380 struct pci_dev *self = child->self;
381 if (!self)
382 continue;
383
384 pcie_bus_configure_settings(child, self->pcie_mpss);
385 }
386 }
387
388 if (!bus)
389 kfree(sd);
390
391 if (bus && node != -1) {
392#ifdef CONFIG_ACPI_NUMA
393 if (pxm >= 0)
394 dev_printk(KERN_DEBUG, &bus->dev,
395 "on NUMA node %d (pxm %d)\n", node, pxm);
396#else
397 dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
398#endif
399 }
400
401 return bus;
402}
403
404int __init pci_acpi_init(void)
405{
406 struct pci_dev *dev = NULL;
407
408 if (acpi_noirq)
409 return -ENODEV;
410
411 printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
412 acpi_irq_penalty_init();
413 pcibios_enable_irq = acpi_pci_irq_enable;
414 pcibios_disable_irq = acpi_pci_irq_disable;
415 x86_init.pci.init_irq = x86_init_noop;
416
417 if (pci_routeirq) {
418 /*
419 * PCI IRQ routing is set up by pci_enable_device(), but we
420 * also do it here in case there are still broken drivers that
421 * don't use pci_enable_device().
422 */
423 printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
424 for_each_pci_dev(dev)
425 acpi_pci_irq_enable(dev);
426 }
427
428 return 0;
429}
1#include <linux/pci.h>
2#include <linux/acpi.h>
3#include <linux/init.h>
4#include <linux/irq.h>
5#include <linux/dmi.h>
6#include <linux/slab.h>
7#include <asm/numa.h>
8#include <asm/pci_x86.h>
9
10struct pci_root_info {
11 struct acpi_device *bridge;
12 char name[16];
13 unsigned int res_num;
14 struct resource *res;
15 resource_size_t *res_offset;
16 struct pci_sysdata sd;
17#ifdef CONFIG_PCI_MMCONFIG
18 bool mcfg_added;
19 u16 segment;
20 u8 start_bus;
21 u8 end_bus;
22#endif
23};
24
25static bool pci_use_crs = true;
26static bool pci_ignore_seg = false;
27
28static int __init set_use_crs(const struct dmi_system_id *id)
29{
30 pci_use_crs = true;
31 return 0;
32}
33
34static int __init set_nouse_crs(const struct dmi_system_id *id)
35{
36 pci_use_crs = false;
37 return 0;
38}
39
40static int __init set_ignore_seg(const struct dmi_system_id *id)
41{
42 printk(KERN_INFO "PCI: %s detected: ignoring ACPI _SEG\n", id->ident);
43 pci_ignore_seg = true;
44 return 0;
45}
46
47static const struct dmi_system_id pci_crs_quirks[] __initconst = {
48 /* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */
49 {
50 .callback = set_use_crs,
51 .ident = "IBM System x3800",
52 .matches = {
53 DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
54 DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
55 },
56 },
57 /* https://bugzilla.kernel.org/show_bug.cgi?id=16007 */
58 /* 2006 AMD HT/VIA system with two host bridges */
59 {
60 .callback = set_use_crs,
61 .ident = "ASRock ALiveSATA2-GLAN",
62 .matches = {
63 DMI_MATCH(DMI_PRODUCT_NAME, "ALiveSATA2-GLAN"),
64 },
65 },
66 /* https://bugzilla.kernel.org/show_bug.cgi?id=30552 */
67 /* 2006 AMD HT/VIA system with two host bridges */
68 {
69 .callback = set_use_crs,
70 .ident = "ASUS M2V-MX SE",
71 .matches = {
72 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
73 DMI_MATCH(DMI_BOARD_NAME, "M2V-MX SE"),
74 DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
75 },
76 },
77 /* https://bugzilla.kernel.org/show_bug.cgi?id=42619 */
78 {
79 .callback = set_use_crs,
80 .ident = "MSI MS-7253",
81 .matches = {
82 DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
83 DMI_MATCH(DMI_BOARD_NAME, "MS-7253"),
84 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"),
85 },
86 },
87
88 /* Now for the blacklist.. */
89
90 /* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
91 {
92 .callback = set_nouse_crs,
93 .ident = "Dell Studio 1557",
94 .matches = {
95 DMI_MATCH(DMI_BOARD_VENDOR, "Dell Inc."),
96 DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1557"),
97 DMI_MATCH(DMI_BIOS_VERSION, "A09"),
98 },
99 },
100 /* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
101 {
102 .callback = set_nouse_crs,
103 .ident = "Thinkpad SL510",
104 .matches = {
105 DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
106 DMI_MATCH(DMI_BOARD_NAME, "2847DFG"),
107 DMI_MATCH(DMI_BIOS_VERSION, "6JET85WW (1.43 )"),
108 },
109 },
110
111 /* https://bugzilla.kernel.org/show_bug.cgi?id=15362 */
112 {
113 .callback = set_ignore_seg,
114 .ident = "HP xw9300",
115 .matches = {
116 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
117 DMI_MATCH(DMI_PRODUCT_NAME, "HP xw9300 Workstation"),
118 },
119 },
120 {}
121};
122
123void __init pci_acpi_crs_quirks(void)
124{
125 int year;
126
127 if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008)
128 pci_use_crs = false;
129
130 dmi_check_system(pci_crs_quirks);
131
132 /*
133 * If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that
134 * takes precedence over anything we figured out above.
135 */
136 if (pci_probe & PCI_ROOT_NO_CRS)
137 pci_use_crs = false;
138 else if (pci_probe & PCI_USE__CRS)
139 pci_use_crs = true;
140
141 printk(KERN_INFO "PCI: %s host bridge windows from ACPI; "
142 "if necessary, use \"pci=%s\" and report a bug\n",
143 pci_use_crs ? "Using" : "Ignoring",
144 pci_use_crs ? "nocrs" : "use_crs");
145}
146
147#ifdef CONFIG_PCI_MMCONFIG
148static int check_segment(u16 seg, struct device *dev, char *estr)
149{
150 if (seg) {
151 dev_err(dev,
152 "%s can't access PCI configuration "
153 "space under this host bridge.\n",
154 estr);
155 return -EIO;
156 }
157
158 /*
159 * Failure in adding MMCFG information is not fatal,
160 * just can't access extended configuration space of
161 * devices under this host bridge.
162 */
163 dev_warn(dev,
164 "%s can't access extended PCI configuration "
165 "space under this bridge.\n",
166 estr);
167
168 return 0;
169}
170
171static int setup_mcfg_map(struct pci_root_info *info, u16 seg, u8 start,
172 u8 end, phys_addr_t addr)
173{
174 int result;
175 struct device *dev = &info->bridge->dev;
176
177 info->start_bus = start;
178 info->end_bus = end;
179 info->mcfg_added = false;
180
181 /* return success if MMCFG is not in use */
182 if (raw_pci_ext_ops && raw_pci_ext_ops != &pci_mmcfg)
183 return 0;
184
185 if (!(pci_probe & PCI_PROBE_MMCONF))
186 return check_segment(seg, dev, "MMCONFIG is disabled,");
187
188 result = pci_mmconfig_insert(dev, seg, start, end, addr);
189 if (result == 0) {
190 /* enable MMCFG if it hasn't been enabled yet */
191 if (raw_pci_ext_ops == NULL)
192 raw_pci_ext_ops = &pci_mmcfg;
193 info->mcfg_added = true;
194 } else if (result != -EEXIST)
195 return check_segment(seg, dev,
196 "fail to add MMCONFIG information,");
197
198 return 0;
199}
200
201static void teardown_mcfg_map(struct pci_root_info *info)
202{
203 if (info->mcfg_added) {
204 pci_mmconfig_delete(info->segment, info->start_bus,
205 info->end_bus);
206 info->mcfg_added = false;
207 }
208}
209#else
210static int setup_mcfg_map(struct pci_root_info *info,
211 u16 seg, u8 start, u8 end,
212 phys_addr_t addr)
213{
214 return 0;
215}
216static void teardown_mcfg_map(struct pci_root_info *info)
217{
218}
219#endif
220
221static acpi_status resource_to_addr(struct acpi_resource *resource,
222 struct acpi_resource_address64 *addr)
223{
224 acpi_status status;
225 struct acpi_resource_memory24 *memory24;
226 struct acpi_resource_memory32 *memory32;
227 struct acpi_resource_fixed_memory32 *fixed_memory32;
228
229 memset(addr, 0, sizeof(*addr));
230 switch (resource->type) {
231 case ACPI_RESOURCE_TYPE_MEMORY24:
232 memory24 = &resource->data.memory24;
233 addr->resource_type = ACPI_MEMORY_RANGE;
234 addr->minimum = memory24->minimum;
235 addr->address_length = memory24->address_length;
236 addr->maximum = addr->minimum + addr->address_length - 1;
237 return AE_OK;
238 case ACPI_RESOURCE_TYPE_MEMORY32:
239 memory32 = &resource->data.memory32;
240 addr->resource_type = ACPI_MEMORY_RANGE;
241 addr->minimum = memory32->minimum;
242 addr->address_length = memory32->address_length;
243 addr->maximum = addr->minimum + addr->address_length - 1;
244 return AE_OK;
245 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
246 fixed_memory32 = &resource->data.fixed_memory32;
247 addr->resource_type = ACPI_MEMORY_RANGE;
248 addr->minimum = fixed_memory32->address;
249 addr->address_length = fixed_memory32->address_length;
250 addr->maximum = addr->minimum + addr->address_length - 1;
251 return AE_OK;
252 case ACPI_RESOURCE_TYPE_ADDRESS16:
253 case ACPI_RESOURCE_TYPE_ADDRESS32:
254 case ACPI_RESOURCE_TYPE_ADDRESS64:
255 status = acpi_resource_to_address64(resource, addr);
256 if (ACPI_SUCCESS(status) &&
257 (addr->resource_type == ACPI_MEMORY_RANGE ||
258 addr->resource_type == ACPI_IO_RANGE) &&
259 addr->address_length > 0) {
260 return AE_OK;
261 }
262 break;
263 }
264 return AE_ERROR;
265}
266
267static acpi_status count_resource(struct acpi_resource *acpi_res, void *data)
268{
269 struct pci_root_info *info = data;
270 struct acpi_resource_address64 addr;
271 acpi_status status;
272
273 status = resource_to_addr(acpi_res, &addr);
274 if (ACPI_SUCCESS(status))
275 info->res_num++;
276 return AE_OK;
277}
278
279static acpi_status setup_resource(struct acpi_resource *acpi_res, void *data)
280{
281 struct pci_root_info *info = data;
282 struct resource *res;
283 struct acpi_resource_address64 addr;
284 acpi_status status;
285 unsigned long flags;
286 u64 start, orig_end, end;
287
288 status = resource_to_addr(acpi_res, &addr);
289 if (!ACPI_SUCCESS(status))
290 return AE_OK;
291
292 if (addr.resource_type == ACPI_MEMORY_RANGE) {
293 flags = IORESOURCE_MEM;
294 if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
295 flags |= IORESOURCE_PREFETCH;
296 } else if (addr.resource_type == ACPI_IO_RANGE) {
297 flags = IORESOURCE_IO;
298 } else
299 return AE_OK;
300
301 start = addr.minimum + addr.translation_offset;
302 orig_end = end = addr.maximum + addr.translation_offset;
303
304 /* Exclude non-addressable range or non-addressable portion of range */
305 end = min(end, (u64)iomem_resource.end);
306 if (end <= start) {
307 dev_info(&info->bridge->dev,
308 "host bridge window [%#llx-%#llx] "
309 "(ignored, not CPU addressable)\n", start, orig_end);
310 return AE_OK;
311 } else if (orig_end != end) {
312 dev_info(&info->bridge->dev,
313 "host bridge window [%#llx-%#llx] "
314 "([%#llx-%#llx] ignored, not CPU addressable)\n",
315 start, orig_end, end + 1, orig_end);
316 }
317
318 res = &info->res[info->res_num];
319 res->name = info->name;
320 res->flags = flags;
321 res->start = start;
322 res->end = end;
323 info->res_offset[info->res_num] = addr.translation_offset;
324 info->res_num++;
325
326 if (!pci_use_crs)
327 dev_printk(KERN_DEBUG, &info->bridge->dev,
328 "host bridge window %pR (ignored)\n", res);
329
330 return AE_OK;
331}
332
333static void coalesce_windows(struct pci_root_info *info, unsigned long type)
334{
335 int i, j;
336 struct resource *res1, *res2;
337
338 for (i = 0; i < info->res_num; i++) {
339 res1 = &info->res[i];
340 if (!(res1->flags & type))
341 continue;
342
343 for (j = i + 1; j < info->res_num; j++) {
344 res2 = &info->res[j];
345 if (!(res2->flags & type))
346 continue;
347
348 /*
349 * I don't like throwing away windows because then
350 * our resources no longer match the ACPI _CRS, but
351 * the kernel resource tree doesn't allow overlaps.
352 */
353 if (resource_overlaps(res1, res2)) {
354 res2->start = min(res1->start, res2->start);
355 res2->end = max(res1->end, res2->end);
356 dev_info(&info->bridge->dev,
357 "host bridge window expanded to %pR; %pR ignored\n",
358 res2, res1);
359 res1->flags = 0;
360 }
361 }
362 }
363}
364
365static void add_resources(struct pci_root_info *info,
366 struct list_head *resources)
367{
368 int i;
369 struct resource *res, *root, *conflict;
370
371 coalesce_windows(info, IORESOURCE_MEM);
372 coalesce_windows(info, IORESOURCE_IO);
373
374 for (i = 0; i < info->res_num; i++) {
375 res = &info->res[i];
376
377 if (res->flags & IORESOURCE_MEM)
378 root = &iomem_resource;
379 else if (res->flags & IORESOURCE_IO)
380 root = &ioport_resource;
381 else
382 continue;
383
384 conflict = insert_resource_conflict(root, res);
385 if (conflict)
386 dev_info(&info->bridge->dev,
387 "ignoring host bridge window %pR (conflicts with %s %pR)\n",
388 res, conflict->name, conflict);
389 else
390 pci_add_resource_offset(resources, res,
391 info->res_offset[i]);
392 }
393}
394
395static void free_pci_root_info_res(struct pci_root_info *info)
396{
397 kfree(info->res);
398 info->res = NULL;
399 kfree(info->res_offset);
400 info->res_offset = NULL;
401 info->res_num = 0;
402}
403
404static void __release_pci_root_info(struct pci_root_info *info)
405{
406 int i;
407 struct resource *res;
408
409 for (i = 0; i < info->res_num; i++) {
410 res = &info->res[i];
411
412 if (!res->parent)
413 continue;
414
415 if (!(res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
416 continue;
417
418 release_resource(res);
419 }
420
421 free_pci_root_info_res(info);
422
423 teardown_mcfg_map(info);
424
425 kfree(info);
426}
427
428static void release_pci_root_info(struct pci_host_bridge *bridge)
429{
430 struct pci_root_info *info = bridge->release_data;
431
432 __release_pci_root_info(info);
433}
434
435static void probe_pci_root_info(struct pci_root_info *info,
436 struct acpi_device *device,
437 int busnum, int domain)
438{
439 size_t size;
440
441 sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);
442 info->bridge = device;
443
444 info->res_num = 0;
445 acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
446 info);
447 if (!info->res_num)
448 return;
449
450 size = sizeof(*info->res) * info->res_num;
451 info->res = kzalloc(size, GFP_KERNEL);
452 if (!info->res) {
453 info->res_num = 0;
454 return;
455 }
456
457 size = sizeof(*info->res_offset) * info->res_num;
458 info->res_num = 0;
459 info->res_offset = kzalloc(size, GFP_KERNEL);
460 if (!info->res_offset) {
461 kfree(info->res);
462 info->res = NULL;
463 return;
464 }
465
466 acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
467 info);
468}
469
470struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
471{
472 struct acpi_device *device = root->device;
473 struct pci_root_info *info;
474 int domain = root->segment;
475 int busnum = root->secondary.start;
476 LIST_HEAD(resources);
477 struct pci_bus *bus;
478 struct pci_sysdata *sd;
479 int node;
480
481 if (pci_ignore_seg)
482 domain = 0;
483
484 if (domain && !pci_domains_supported) {
485 printk(KERN_WARNING "pci_bus %04x:%02x: "
486 "ignored (multiple domains not supported)\n",
487 domain, busnum);
488 return NULL;
489 }
490
491 node = acpi_get_node(device->handle);
492 if (node == NUMA_NO_NODE)
493 node = x86_pci_root_bus_node(busnum);
494
495 if (node != NUMA_NO_NODE && !node_online(node))
496 node = NUMA_NO_NODE;
497
498 info = kzalloc(sizeof(*info), GFP_KERNEL);
499 if (!info) {
500 printk(KERN_WARNING "pci_bus %04x:%02x: "
501 "ignored (out of memory)\n", domain, busnum);
502 return NULL;
503 }
504
505 sd = &info->sd;
506 sd->domain = domain;
507 sd->node = node;
508 sd->companion = device;
509
510 bus = pci_find_bus(domain, busnum);
511 if (bus) {
512 /*
513 * If the desired bus has been scanned already, replace
514 * its bus->sysdata.
515 */
516 memcpy(bus->sysdata, sd, sizeof(*sd));
517 kfree(info);
518 } else {
519 probe_pci_root_info(info, device, busnum, domain);
520
521 /* insert busn res at first */
522 pci_add_resource(&resources, &root->secondary);
523 /*
524 * _CRS with no apertures is normal, so only fall back to
525 * defaults or native bridge info if we're ignoring _CRS.
526 */
527 if (pci_use_crs)
528 add_resources(info, &resources);
529 else {
530 free_pci_root_info_res(info);
531 x86_pci_root_bus_resources(busnum, &resources);
532 }
533
534 if (!setup_mcfg_map(info, domain, (u8)root->secondary.start,
535 (u8)root->secondary.end, root->mcfg_addr))
536 bus = pci_create_root_bus(NULL, busnum, &pci_root_ops,
537 sd, &resources);
538
539 if (bus) {
540 pci_scan_child_bus(bus);
541 pci_set_host_bridge_release(
542 to_pci_host_bridge(bus->bridge),
543 release_pci_root_info, info);
544 } else {
545 pci_free_resource_list(&resources);
546 __release_pci_root_info(info);
547 }
548 }
549
550 /* After the PCI-E bus has been walked and all devices discovered,
551 * configure any settings of the fabric that might be necessary.
552 */
553 if (bus) {
554 struct pci_bus *child;
555 list_for_each_entry(child, &bus->children, node)
556 pcie_bus_configure_settings(child);
557 }
558
559 if (bus && node != NUMA_NO_NODE)
560 dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
561
562 return bus;
563}
564
565int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
566{
567 struct pci_sysdata *sd = bridge->bus->sysdata;
568
569 ACPI_COMPANION_SET(&bridge->dev, sd->companion);
570 return 0;
571}
572
573int __init pci_acpi_init(void)
574{
575 struct pci_dev *dev = NULL;
576
577 if (acpi_noirq)
578 return -ENODEV;
579
580 printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
581 acpi_irq_penalty_init();
582 pcibios_enable_irq = acpi_pci_irq_enable;
583 pcibios_disable_irq = acpi_pci_irq_disable;
584 x86_init.pci.init_irq = x86_init_noop;
585
586 if (pci_routeirq) {
587 /*
588 * PCI IRQ routing is set up by pci_enable_device(), but we
589 * also do it here in case there are still broken drivers that
590 * don't use pci_enable_device().
591 */
592 printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
593 for_each_pci_dev(dev)
594 acpi_pci_irq_enable(dev);
595 }
596
597 return 0;
598}