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1// SPDX-License-Identifier: GPL-2.0
2#include <linux/pci.h>
3#include <linux/acpi.h>
4#include <linux/init.h>
5#include <linux/irq.h>
6#include <linux/dmi.h>
7#include <linux/slab.h>
8#include <linux/pci-acpi.h>
9#include <asm/numa.h>
10#include <asm/pci_x86.h>
11
12struct pci_root_info {
13 struct acpi_pci_root_info common;
14 struct pci_sysdata sd;
15#ifdef CONFIG_PCI_MMCONFIG
16 bool mcfg_added;
17 u8 start_bus;
18 u8 end_bus;
19#endif
20};
21
22static bool pci_use_crs = true;
23static bool pci_ignore_seg = false;
24
25static int __init set_use_crs(const struct dmi_system_id *id)
26{
27 pci_use_crs = true;
28 return 0;
29}
30
31static int __init set_nouse_crs(const struct dmi_system_id *id)
32{
33 pci_use_crs = false;
34 return 0;
35}
36
37static int __init set_ignore_seg(const struct dmi_system_id *id)
38{
39 printk(KERN_INFO "PCI: %s detected: ignoring ACPI _SEG\n", id->ident);
40 pci_ignore_seg = true;
41 return 0;
42}
43
44static const struct dmi_system_id pci_crs_quirks[] __initconst = {
45 /* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */
46 {
47 .callback = set_use_crs,
48 .ident = "IBM System x3800",
49 .matches = {
50 DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
51 DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
52 },
53 },
54 /* https://bugzilla.kernel.org/show_bug.cgi?id=16007 */
55 /* 2006 AMD HT/VIA system with two host bridges */
56 {
57 .callback = set_use_crs,
58 .ident = "ASRock ALiveSATA2-GLAN",
59 .matches = {
60 DMI_MATCH(DMI_PRODUCT_NAME, "ALiveSATA2-GLAN"),
61 },
62 },
63 /* https://bugzilla.kernel.org/show_bug.cgi?id=30552 */
64 /* 2006 AMD HT/VIA system with two host bridges */
65 {
66 .callback = set_use_crs,
67 .ident = "ASUS M2V-MX SE",
68 .matches = {
69 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
70 DMI_MATCH(DMI_BOARD_NAME, "M2V-MX SE"),
71 DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
72 },
73 },
74 /* https://bugzilla.kernel.org/show_bug.cgi?id=42619 */
75 {
76 .callback = set_use_crs,
77 .ident = "MSI MS-7253",
78 .matches = {
79 DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
80 DMI_MATCH(DMI_BOARD_NAME, "MS-7253"),
81 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"),
82 },
83 },
84 /* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/931368 */
85 /* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1033299 */
86 {
87 .callback = set_use_crs,
88 .ident = "Foxconn K8M890-8237A",
89 .matches = {
90 DMI_MATCH(DMI_BOARD_VENDOR, "Foxconn"),
91 DMI_MATCH(DMI_BOARD_NAME, "K8M890-8237A"),
92 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"),
93 },
94 },
95
96 /* Now for the blacklist.. */
97
98 /* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
99 {
100 .callback = set_nouse_crs,
101 .ident = "Dell Studio 1557",
102 .matches = {
103 DMI_MATCH(DMI_BOARD_VENDOR, "Dell Inc."),
104 DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1557"),
105 DMI_MATCH(DMI_BIOS_VERSION, "A09"),
106 },
107 },
108 /* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
109 {
110 .callback = set_nouse_crs,
111 .ident = "Thinkpad SL510",
112 .matches = {
113 DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
114 DMI_MATCH(DMI_BOARD_NAME, "2847DFG"),
115 DMI_MATCH(DMI_BIOS_VERSION, "6JET85WW (1.43 )"),
116 },
117 },
118 /* https://bugzilla.kernel.org/show_bug.cgi?id=42606 */
119 {
120 .callback = set_nouse_crs,
121 .ident = "Supermicro X8DTH",
122 .matches = {
123 DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"),
124 DMI_MATCH(DMI_PRODUCT_NAME, "X8DTH-i/6/iF/6F"),
125 DMI_MATCH(DMI_BIOS_VERSION, "2.0a"),
126 },
127 },
128
129 /* https://bugzilla.kernel.org/show_bug.cgi?id=15362 */
130 {
131 .callback = set_ignore_seg,
132 .ident = "HP xw9300",
133 .matches = {
134 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
135 DMI_MATCH(DMI_PRODUCT_NAME, "HP xw9300 Workstation"),
136 },
137 },
138 {}
139};
140
141void __init pci_acpi_crs_quirks(void)
142{
143 int year = dmi_get_bios_year();
144
145 if (year >= 0 && year < 2008 && iomem_resource.end <= 0xffffffff)
146 pci_use_crs = false;
147
148 dmi_check_system(pci_crs_quirks);
149
150 /*
151 * If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that
152 * takes precedence over anything we figured out above.
153 */
154 if (pci_probe & PCI_ROOT_NO_CRS)
155 pci_use_crs = false;
156 else if (pci_probe & PCI_USE__CRS)
157 pci_use_crs = true;
158
159 printk(KERN_INFO "PCI: %s host bridge windows from ACPI; "
160 "if necessary, use \"pci=%s\" and report a bug\n",
161 pci_use_crs ? "Using" : "Ignoring",
162 pci_use_crs ? "nocrs" : "use_crs");
163}
164
165#ifdef CONFIG_PCI_MMCONFIG
166static int check_segment(u16 seg, struct device *dev, char *estr)
167{
168 if (seg) {
169 dev_err(dev,
170 "%s can't access PCI configuration "
171 "space under this host bridge.\n",
172 estr);
173 return -EIO;
174 }
175
176 /*
177 * Failure in adding MMCFG information is not fatal,
178 * just can't access extended configuration space of
179 * devices under this host bridge.
180 */
181 dev_warn(dev,
182 "%s can't access extended PCI configuration "
183 "space under this bridge.\n",
184 estr);
185
186 return 0;
187}
188
189static int setup_mcfg_map(struct acpi_pci_root_info *ci)
190{
191 int result, seg;
192 struct pci_root_info *info;
193 struct acpi_pci_root *root = ci->root;
194 struct device *dev = &ci->bridge->dev;
195
196 info = container_of(ci, struct pci_root_info, common);
197 info->start_bus = (u8)root->secondary.start;
198 info->end_bus = (u8)root->secondary.end;
199 info->mcfg_added = false;
200 seg = info->sd.domain;
201
202 /* return success if MMCFG is not in use */
203 if (raw_pci_ext_ops && raw_pci_ext_ops != &pci_mmcfg)
204 return 0;
205
206 if (!(pci_probe & PCI_PROBE_MMCONF))
207 return check_segment(seg, dev, "MMCONFIG is disabled,");
208
209 result = pci_mmconfig_insert(dev, seg, info->start_bus, info->end_bus,
210 root->mcfg_addr);
211 if (result == 0) {
212 /* enable MMCFG if it hasn't been enabled yet */
213 if (raw_pci_ext_ops == NULL)
214 raw_pci_ext_ops = &pci_mmcfg;
215 info->mcfg_added = true;
216 } else if (result != -EEXIST)
217 return check_segment(seg, dev,
218 "fail to add MMCONFIG information,");
219
220 return 0;
221}
222
223static void teardown_mcfg_map(struct acpi_pci_root_info *ci)
224{
225 struct pci_root_info *info;
226
227 info = container_of(ci, struct pci_root_info, common);
228 if (info->mcfg_added) {
229 pci_mmconfig_delete(info->sd.domain,
230 info->start_bus, info->end_bus);
231 info->mcfg_added = false;
232 }
233}
234#else
235static int setup_mcfg_map(struct acpi_pci_root_info *ci)
236{
237 return 0;
238}
239
240static void teardown_mcfg_map(struct acpi_pci_root_info *ci)
241{
242}
243#endif
244
245static int pci_acpi_root_get_node(struct acpi_pci_root *root)
246{
247 int busnum = root->secondary.start;
248 struct acpi_device *device = root->device;
249 int node = acpi_get_node(device->handle);
250
251 if (node == NUMA_NO_NODE) {
252 node = x86_pci_root_bus_node(busnum);
253 if (node != 0 && node != NUMA_NO_NODE)
254 dev_info(&device->dev, FW_BUG "no _PXM; falling back to node %d from hardware (may be inconsistent with ACPI node numbers)\n",
255 node);
256 }
257 if (node != NUMA_NO_NODE && !node_online(node))
258 node = NUMA_NO_NODE;
259
260 return node;
261}
262
263static int pci_acpi_root_init_info(struct acpi_pci_root_info *ci)
264{
265 return setup_mcfg_map(ci);
266}
267
268static void pci_acpi_root_release_info(struct acpi_pci_root_info *ci)
269{
270 teardown_mcfg_map(ci);
271 kfree(container_of(ci, struct pci_root_info, common));
272}
273
274/*
275 * An IO port or MMIO resource assigned to a PCI host bridge may be
276 * consumed by the host bridge itself or available to its child
277 * bus/devices. The ACPI specification defines a bit (Producer/Consumer)
278 * to tell whether the resource is consumed by the host bridge itself,
279 * but firmware hasn't used that bit consistently, so we can't rely on it.
280 *
281 * On x86 and IA64 platforms, all IO port and MMIO resources are assumed
282 * to be available to child bus/devices except one special case:
283 * IO port [0xCF8-0xCFF] is consumed by the host bridge itself
284 * to access PCI configuration space.
285 *
286 * So explicitly filter out PCI CFG IO ports[0xCF8-0xCFF].
287 */
288static bool resource_is_pcicfg_ioport(struct resource *res)
289{
290 return (res->flags & IORESOURCE_IO) &&
291 res->start == 0xCF8 && res->end == 0xCFF;
292}
293
294static int pci_acpi_root_prepare_resources(struct acpi_pci_root_info *ci)
295{
296 struct acpi_device *device = ci->bridge;
297 int busnum = ci->root->secondary.start;
298 struct resource_entry *entry, *tmp;
299 int status;
300
301 status = acpi_pci_probe_root_resources(ci);
302 if (pci_use_crs) {
303 resource_list_for_each_entry_safe(entry, tmp, &ci->resources)
304 if (resource_is_pcicfg_ioport(entry->res))
305 resource_list_destroy_entry(entry);
306 return status;
307 }
308
309 resource_list_for_each_entry_safe(entry, tmp, &ci->resources) {
310 dev_printk(KERN_DEBUG, &device->dev,
311 "host bridge window %pR (ignored)\n", entry->res);
312 resource_list_destroy_entry(entry);
313 }
314 x86_pci_root_bus_resources(busnum, &ci->resources);
315
316 return 0;
317}
318
319static struct acpi_pci_root_ops acpi_pci_root_ops = {
320 .pci_ops = &pci_root_ops,
321 .init_info = pci_acpi_root_init_info,
322 .release_info = pci_acpi_root_release_info,
323 .prepare_resources = pci_acpi_root_prepare_resources,
324};
325
326struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
327{
328 int domain = root->segment;
329 int busnum = root->secondary.start;
330 int node = pci_acpi_root_get_node(root);
331 struct pci_bus *bus;
332
333 if (pci_ignore_seg)
334 root->segment = domain = 0;
335
336 if (domain && !pci_domains_supported) {
337 printk(KERN_WARNING "pci_bus %04x:%02x: "
338 "ignored (multiple domains not supported)\n",
339 domain, busnum);
340 return NULL;
341 }
342
343 bus = pci_find_bus(domain, busnum);
344 if (bus) {
345 /*
346 * If the desired bus has been scanned already, replace
347 * its bus->sysdata.
348 */
349 struct pci_sysdata sd = {
350 .domain = domain,
351 .node = node,
352 .companion = root->device
353 };
354
355 memcpy(bus->sysdata, &sd, sizeof(sd));
356 } else {
357 struct pci_root_info *info;
358
359 info = kzalloc(sizeof(*info), GFP_KERNEL);
360 if (!info)
361 dev_err(&root->device->dev,
362 "pci_bus %04x:%02x: ignored (out of memory)\n",
363 domain, busnum);
364 else {
365 info->sd.domain = domain;
366 info->sd.node = node;
367 info->sd.companion = root->device;
368 bus = acpi_pci_root_create(root, &acpi_pci_root_ops,
369 &info->common, &info->sd);
370 }
371 }
372
373 /* After the PCI-E bus has been walked and all devices discovered,
374 * configure any settings of the fabric that might be necessary.
375 */
376 if (bus) {
377 struct pci_bus *child;
378 list_for_each_entry(child, &bus->children, node)
379 pcie_bus_configure_settings(child);
380 }
381
382 return bus;
383}
384
385int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
386{
387 /*
388 * We pass NULL as parent to pci_create_root_bus(), so if it is not NULL
389 * here, pci_create_root_bus() has been called by someone else and
390 * sysdata is likely to be different from what we expect. Let it go in
391 * that case.
392 */
393 if (!bridge->dev.parent) {
394 struct pci_sysdata *sd = bridge->bus->sysdata;
395 ACPI_COMPANION_SET(&bridge->dev, sd->companion);
396 }
397 return 0;
398}
399
400int __init pci_acpi_init(void)
401{
402 struct pci_dev *dev = NULL;
403
404 if (acpi_noirq)
405 return -ENODEV;
406
407 printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
408 acpi_irq_penalty_init();
409 pcibios_enable_irq = acpi_pci_irq_enable;
410 pcibios_disable_irq = acpi_pci_irq_disable;
411 x86_init.pci.init_irq = x86_init_noop;
412
413 if (pci_routeirq) {
414 /*
415 * PCI IRQ routing is set up by pci_enable_device(), but we
416 * also do it here in case there are still broken drivers that
417 * don't use pci_enable_device().
418 */
419 printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
420 for_each_pci_dev(dev)
421 acpi_pci_irq_enable(dev);
422 }
423
424 return 0;
425}
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}