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30#include "hw/hw.h"
31#include "hw/pci-host/q35.h"
32#include "qapi/visitor.h"
33
34
35
36
37
38static void q35_host_realize(DeviceState *dev, Error **errp)
39{
40 PCIHostState *pci = PCI_HOST_BRIDGE(dev);
41 Q35PCIHost *s = Q35_HOST_DEVICE(dev);
42 SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
43
44 sysbus_add_io(sbd, MCH_HOST_BRIDGE_CONFIG_ADDR, &pci->conf_mem);
45 sysbus_init_ioports(sbd, MCH_HOST_BRIDGE_CONFIG_ADDR, 4);
46
47 sysbus_add_io(sbd, MCH_HOST_BRIDGE_CONFIG_DATA, &pci->data_mem);
48 sysbus_init_ioports(sbd, MCH_HOST_BRIDGE_CONFIG_DATA, 4);
49
50 pci->bus = pci_bus_new(DEVICE(s), "pcie.0",
51 s->mch.pci_address_space, s->mch.address_space_io,
52 0, TYPE_PCIE_BUS);
53 qdev_set_parent_bus(DEVICE(&s->mch), BUS(pci->bus));
54 qdev_init_nofail(DEVICE(&s->mch));
55}
56
57static const char *q35_host_root_bus_path(PCIHostState *host_bridge,
58 PCIBus *rootbus)
59{
60 Q35PCIHost *s = Q35_HOST_DEVICE(host_bridge);
61
62
63 if (s->mch.short_root_bus) {
64 return "0000";
65 }
66 return "0000:00";
67}
68
69static void q35_host_get_pci_hole_start(Object *obj, Visitor *v,
70 void *opaque, const char *name,
71 Error **errp)
72{
73 Q35PCIHost *s = Q35_HOST_DEVICE(obj);
74 uint32_t value = s->mch.pci_info.w32.begin;
75
76 visit_type_uint32(v, &value, name, errp);
77}
78
79static void q35_host_get_pci_hole_end(Object *obj, Visitor *v,
80 void *opaque, const char *name,
81 Error **errp)
82{
83 Q35PCIHost *s = Q35_HOST_DEVICE(obj);
84 uint32_t value = s->mch.pci_info.w32.end;
85
86 visit_type_uint32(v, &value, name, errp);
87}
88
89static void q35_host_get_pci_hole64_start(Object *obj, Visitor *v,
90 void *opaque, const char *name,
91 Error **errp)
92{
93 PCIHostState *h = PCI_HOST_BRIDGE(obj);
94 Range w64;
95
96 pci_bus_get_w64_range(h->bus, &w64);
97
98 visit_type_uint64(v, &w64.begin, name, errp);
99}
100
101static void q35_host_get_pci_hole64_end(Object *obj, Visitor *v,
102 void *opaque, const char *name,
103 Error **errp)
104{
105 PCIHostState *h = PCI_HOST_BRIDGE(obj);
106 Range w64;
107
108 pci_bus_get_w64_range(h->bus, &w64);
109
110 visit_type_uint64(v, &w64.end, name, errp);
111}
112
113static void q35_host_get_mmcfg_size(Object *obj, Visitor *v,
114 void *opaque, const char *name,
115 Error **errp)
116{
117 PCIExpressHost *e = PCIE_HOST_BRIDGE(obj);
118 uint32_t value = e->size;
119
120 visit_type_uint32(v, &value, name, errp);
121}
122
123static Property mch_props[] = {
124 DEFINE_PROP_UINT64(PCIE_HOST_MCFG_BASE, Q35PCIHost, parent_obj.base_addr,
125 MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT),
126 DEFINE_PROP_SIZE(PCI_HOST_PROP_PCI_HOLE64_SIZE, Q35PCIHost,
127 mch.pci_hole64_size, DEFAULT_PCI_HOLE64_SIZE),
128 DEFINE_PROP_UINT32("short_root_bus", Q35PCIHost, mch.short_root_bus, 0),
129 DEFINE_PROP_END_OF_LIST(),
130};
131
132static void q35_host_class_init(ObjectClass *klass, void *data)
133{
134 DeviceClass *dc = DEVICE_CLASS(klass);
135 PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
136
137 hc->root_bus_path = q35_host_root_bus_path;
138 dc->realize = q35_host_realize;
139 dc->props = mch_props;
140 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
141 dc->fw_name = "pci";
142}
143
144static void q35_host_initfn(Object *obj)
145{
146 Q35PCIHost *s = Q35_HOST_DEVICE(obj);
147 PCIHostState *phb = PCI_HOST_BRIDGE(obj);
148
149 memory_region_init_io(&phb->conf_mem, obj, &pci_host_conf_le_ops, phb,
150 "pci-conf-idx", 4);
151 memory_region_init_io(&phb->data_mem, obj, &pci_host_data_le_ops, phb,
152 "pci-conf-data", 4);
153
154 object_initialize(&s->mch, sizeof(s->mch), TYPE_MCH_PCI_DEVICE);
155 object_property_add_child(OBJECT(s), "mch", OBJECT(&s->mch), NULL);
156 qdev_prop_set_uint32(DEVICE(&s->mch), "addr", PCI_DEVFN(0, 0));
157 qdev_prop_set_bit(DEVICE(&s->mch), "multifunction", false);
158
159 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_START, "int",
160 q35_host_get_pci_hole_start,
161 NULL, NULL, NULL, NULL);
162
163 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_END, "int",
164 q35_host_get_pci_hole_end,
165 NULL, NULL, NULL, NULL);
166
167 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_START, "int",
168 q35_host_get_pci_hole64_start,
169 NULL, NULL, NULL, NULL);
170
171 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_END, "int",
172 q35_host_get_pci_hole64_end,
173 NULL, NULL, NULL, NULL);
174
175 object_property_add(obj, PCIE_HOST_MCFG_SIZE, "int",
176 q35_host_get_mmcfg_size,
177 NULL, NULL, NULL, NULL);
178
179
180
181
182
183
184 s->mch.pci_info.w32.begin = MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT +
185 MCH_HOST_BRIDGE_PCIEXBAR_MAX;
186 s->mch.pci_info.w32.end = IO_APIC_DEFAULT_ADDRESS;
187}
188
189static const TypeInfo q35_host_info = {
190 .name = TYPE_Q35_HOST_DEVICE,
191 .parent = TYPE_PCIE_HOST_BRIDGE,
192 .instance_size = sizeof(Q35PCIHost),
193 .instance_init = q35_host_initfn,
194 .class_init = q35_host_class_init,
195};
196
197
198
199
200
201
202static void mch_update_pciexbar(MCHPCIState *mch)
203{
204 PCIDevice *pci_dev = PCI_DEVICE(mch);
205 BusState *bus = qdev_get_parent_bus(DEVICE(mch));
206 PCIExpressHost *pehb = PCIE_HOST_BRIDGE(bus->parent);
207
208 uint64_t pciexbar;
209 int enable;
210 uint64_t addr;
211 uint64_t addr_mask;
212 uint32_t length;
213
214 pciexbar = pci_get_quad(pci_dev->config + MCH_HOST_BRIDGE_PCIEXBAR);
215 enable = pciexbar & MCH_HOST_BRIDGE_PCIEXBAREN;
216 addr_mask = MCH_HOST_BRIDGE_PCIEXBAR_ADMSK;
217 switch (pciexbar & MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_MASK) {
218 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_256M:
219 length = 256 * 1024 * 1024;
220 break;
221 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_128M:
222 length = 128 * 1024 * 1024;
223 addr_mask |= MCH_HOST_BRIDGE_PCIEXBAR_128ADMSK |
224 MCH_HOST_BRIDGE_PCIEXBAR_64ADMSK;
225 break;
226 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_64M:
227 length = 64 * 1024 * 1024;
228 addr_mask |= MCH_HOST_BRIDGE_PCIEXBAR_64ADMSK;
229 break;
230 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_RVD:
231 default:
232 enable = 0;
233 length = 0;
234 abort();
235 break;
236 }
237 addr = pciexbar & addr_mask;
238 pcie_host_mmcfg_update(pehb, enable, addr, length);
239
240
241
242
243
244 if (enable) {
245 mch->pci_info.w32.begin = addr + length;
246 } else {
247 mch->pci_info.w32.begin = MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT;
248 }
249}
250
251
252static void mch_update_pam(MCHPCIState *mch)
253{
254 PCIDevice *pd = PCI_DEVICE(mch);
255 int i;
256
257 memory_region_transaction_begin();
258 for (i = 0; i < 13; i++) {
259 pam_update(&mch->pam_regions[i], i,
260 pd->config[MCH_HOST_BRIDGE_PAM0 + ((i + 1) / 2)]);
261 }
262 memory_region_transaction_commit();
263}
264
265
266static void mch_update_smram(MCHPCIState *mch)
267{
268 PCIDevice *pd = PCI_DEVICE(mch);
269
270 memory_region_transaction_begin();
271 smram_update(&mch->smram_region, pd->config[MCH_HOST_BRIDGE_SMRAM],
272 mch->smm_enabled);
273 memory_region_transaction_commit();
274}
275
276static void mch_set_smm(int smm, void *arg)
277{
278 MCHPCIState *mch = arg;
279 PCIDevice *pd = PCI_DEVICE(mch);
280
281 memory_region_transaction_begin();
282 smram_set_smm(&mch->smm_enabled, smm, pd->config[MCH_HOST_BRIDGE_SMRAM],
283 &mch->smram_region);
284 memory_region_transaction_commit();
285}
286
287static void mch_write_config(PCIDevice *d,
288 uint32_t address, uint32_t val, int len)
289{
290 MCHPCIState *mch = MCH_PCI_DEVICE(d);
291
292
293 pci_default_write_config(d, address, val, len);
294
295 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_PAM0,
296 MCH_HOST_BRIDGE_PAM_SIZE)) {
297 mch_update_pam(mch);
298 }
299
300 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_PCIEXBAR,
301 MCH_HOST_BRIDGE_PCIEXBAR_SIZE)) {
302 mch_update_pciexbar(mch);
303 }
304
305 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_SMRAM,
306 MCH_HOST_BRIDGE_SMRAM_SIZE)) {
307 mch_update_smram(mch);
308 }
309}
310
311static void mch_update(MCHPCIState *mch)
312{
313 mch_update_pciexbar(mch);
314 mch_update_pam(mch);
315 mch_update_smram(mch);
316}
317
318static int mch_post_load(void *opaque, int version_id)
319{
320 MCHPCIState *mch = opaque;
321 mch_update(mch);
322 return 0;
323}
324
325static const VMStateDescription vmstate_mch = {
326 .name = "mch",
327 .version_id = 1,
328 .minimum_version_id = 1,
329 .post_load = mch_post_load,
330 .fields = (VMStateField[]) {
331 VMSTATE_PCI_DEVICE(parent_obj, MCHPCIState),
332 VMSTATE_UINT8(smm_enabled, MCHPCIState),
333 VMSTATE_END_OF_LIST()
334 }
335};
336
337static void mch_reset(DeviceState *qdev)
338{
339 PCIDevice *d = PCI_DEVICE(qdev);
340 MCHPCIState *mch = MCH_PCI_DEVICE(d);
341
342 pci_set_quad(d->config + MCH_HOST_BRIDGE_PCIEXBAR,
343 MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT);
344
345 d->config[MCH_HOST_BRIDGE_SMRAM] = MCH_HOST_BRIDGE_SMRAM_DEFAULT;
346
347 mch_update(mch);
348}
349
350static AddressSpace *q35_host_dma_iommu(PCIBus *bus, void *opaque, int devfn)
351{
352 IntelIOMMUState *s = opaque;
353 VTDAddressSpace **pvtd_as;
354 int bus_num = pci_bus_num(bus);
355
356 assert(0 <= bus_num && bus_num <= VTD_PCI_BUS_MAX);
357 assert(0 <= devfn && devfn <= VTD_PCI_DEVFN_MAX);
358
359 pvtd_as = s->address_spaces[bus_num];
360 if (!pvtd_as) {
361
362 pvtd_as = g_malloc0(sizeof(VTDAddressSpace *) * VTD_PCI_DEVFN_MAX);
363 s->address_spaces[bus_num] = pvtd_as;
364 }
365 if (!pvtd_as[devfn]) {
366 pvtd_as[devfn] = g_malloc0(sizeof(VTDAddressSpace));
367
368 pvtd_as[devfn]->bus_num = (uint8_t)bus_num;
369 pvtd_as[devfn]->devfn = (uint8_t)devfn;
370 pvtd_as[devfn]->iommu_state = s;
371 pvtd_as[devfn]->context_cache_entry.context_cache_gen = 0;
372 memory_region_init_iommu(&pvtd_as[devfn]->iommu, OBJECT(s),
373 &s->iommu_ops, "intel_iommu", UINT64_MAX);
374 address_space_init(&pvtd_as[devfn]->as,
375 &pvtd_as[devfn]->iommu, "intel_iommu");
376 }
377 return &pvtd_as[devfn]->as;
378}
379
380static void mch_init_dmar(MCHPCIState *mch)
381{
382 PCIBus *pci_bus = PCI_BUS(qdev_get_parent_bus(DEVICE(mch)));
383
384 mch->iommu = INTEL_IOMMU_DEVICE(qdev_create(NULL, TYPE_INTEL_IOMMU_DEVICE));
385 object_property_add_child(OBJECT(mch), "intel-iommu",
386 OBJECT(mch->iommu), NULL);
387 qdev_init_nofail(DEVICE(mch->iommu));
388 sysbus_mmio_map(SYS_BUS_DEVICE(mch->iommu), 0, Q35_HOST_BRIDGE_IOMMU_ADDR);
389
390 pci_setup_iommu(pci_bus, q35_host_dma_iommu, mch->iommu);
391}
392
393static void mch_realize(PCIDevice *d, Error **errp)
394{
395 int i;
396 MCHPCIState *mch = MCH_PCI_DEVICE(d);
397
398
399 pc_pci_as_mapping_init(OBJECT(mch), mch->system_memory,
400 mch->pci_address_space);
401
402
403 cpu_smm_register(&mch_set_smm, mch);
404 memory_region_init_alias(&mch->smram_region, OBJECT(mch), "smram-region",
405 mch->pci_address_space, 0xa0000, 0x20000);
406 memory_region_add_subregion_overlap(mch->system_memory, 0xa0000,
407 &mch->smram_region, 1);
408 memory_region_set_enabled(&mch->smram_region, false);
409 init_pam(DEVICE(mch), mch->ram_memory, mch->system_memory,
410 mch->pci_address_space, &mch->pam_regions[0],
411 PAM_BIOS_BASE, PAM_BIOS_SIZE);
412 for (i = 0; i < 12; ++i) {
413 init_pam(DEVICE(mch), mch->ram_memory, mch->system_memory,
414 mch->pci_address_space, &mch->pam_regions[i+1],
415 PAM_EXPAN_BASE + i * PAM_EXPAN_SIZE, PAM_EXPAN_SIZE);
416 }
417
418 if (machine_iommu(current_machine)) {
419 mch_init_dmar(mch);
420 }
421}
422
423uint64_t mch_mcfg_base(void)
424{
425 bool ambiguous;
426 Object *o = object_resolve_path_type("", TYPE_MCH_PCI_DEVICE, &ambiguous);
427 if (!o) {
428 return 0;
429 }
430 return MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT;
431}
432
433static void mch_class_init(ObjectClass *klass, void *data)
434{
435 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
436 DeviceClass *dc = DEVICE_CLASS(klass);
437
438 k->realize = mch_realize;
439 k->config_write = mch_write_config;
440 dc->reset = mch_reset;
441 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
442 dc->desc = "Host bridge";
443 dc->vmsd = &vmstate_mch;
444 k->vendor_id = PCI_VENDOR_ID_INTEL;
445 k->device_id = PCI_DEVICE_ID_INTEL_Q35_MCH;
446 k->revision = MCH_HOST_BRIDGE_REVISION_DEFAULT;
447 k->class_id = PCI_CLASS_BRIDGE_HOST;
448
449
450
451
452 dc->cannot_instantiate_with_device_add_yet = true;
453}
454
455static const TypeInfo mch_info = {
456 .name = TYPE_MCH_PCI_DEVICE,
457 .parent = TYPE_PCI_DEVICE,
458 .instance_size = sizeof(MCHPCIState),
459 .class_init = mch_class_init,
460};
461
462static void q35_register(void)
463{
464 type_register_static(&mch_info);
465 type_register_static(&q35_host_info);
466}
467
468type_init(q35_register);
469
