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30#include "qemu/osdep.h"
31#include "hw/hw.h"
32#include "hw/pci-host/q35.h"
33#include "qapi/error.h"
34#include "qapi/visitor.h"
35
36
37
38
39
40static void q35_host_realize(DeviceState *dev, Error **errp)
41{
42 PCIHostState *pci = PCI_HOST_BRIDGE(dev);
43 Q35PCIHost *s = Q35_HOST_DEVICE(dev);
44 SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
45
46 sysbus_add_io(sbd, MCH_HOST_BRIDGE_CONFIG_ADDR, &pci->conf_mem);
47 sysbus_init_ioports(sbd, MCH_HOST_BRIDGE_CONFIG_ADDR, 4);
48
49 sysbus_add_io(sbd, MCH_HOST_BRIDGE_CONFIG_DATA, &pci->data_mem);
50 sysbus_init_ioports(sbd, MCH_HOST_BRIDGE_CONFIG_DATA, 4);
51
52 pci->bus = pci_bus_new(DEVICE(s), "pcie.0",
53 s->mch.pci_address_space, s->mch.address_space_io,
54 0, TYPE_PCIE_BUS);
55 PC_MACHINE(qdev_get_machine())->bus = pci->bus;
56 qdev_set_parent_bus(DEVICE(&s->mch), BUS(pci->bus));
57 qdev_init_nofail(DEVICE(&s->mch));
58}
59
60static const char *q35_host_root_bus_path(PCIHostState *host_bridge,
61 PCIBus *rootbus)
62{
63 Q35PCIHost *s = Q35_HOST_DEVICE(host_bridge);
64
65
66 if (s->mch.short_root_bus) {
67 return "0000";
68 }
69 return "0000:00";
70}
71
72static void q35_host_get_pci_hole_start(Object *obj, Visitor *v,
73 const char *name, void *opaque,
74 Error **errp)
75{
76 Q35PCIHost *s = Q35_HOST_DEVICE(obj);
77 uint64_t val64;
78 uint32_t value;
79
80 val64 = range_is_empty(&s->mch.pci_hole)
81 ? 0 : range_lob(&s->mch.pci_hole);
82 value = val64;
83 assert(value == val64);
84 visit_type_uint32(v, name, &value, errp);
85}
86
87static void q35_host_get_pci_hole_end(Object *obj, Visitor *v,
88 const char *name, void *opaque,
89 Error **errp)
90{
91 Q35PCIHost *s = Q35_HOST_DEVICE(obj);
92 uint64_t val64;
93 uint32_t value;
94
95 val64 = range_is_empty(&s->mch.pci_hole)
96 ? 0 : range_upb(&s->mch.pci_hole) + 1;
97 value = val64;
98 assert(value == val64);
99 visit_type_uint32(v, name, &value, errp);
100}
101
102static void q35_host_get_pci_hole64_start(Object *obj, Visitor *v,
103 const char *name, void *opaque,
104 Error **errp)
105{
106 PCIHostState *h = PCI_HOST_BRIDGE(obj);
107 Range w64;
108 uint64_t value;
109
110 pci_bus_get_w64_range(h->bus, &w64);
111 value = range_is_empty(&w64) ? 0 : range_lob(&w64);
112 visit_type_uint64(v, name, &value, errp);
113}
114
115static void q35_host_get_pci_hole64_end(Object *obj, Visitor *v,
116 const char *name, void *opaque,
117 Error **errp)
118{
119 PCIHostState *h = PCI_HOST_BRIDGE(obj);
120 Range w64;
121 uint64_t value;
122
123 pci_bus_get_w64_range(h->bus, &w64);
124 value = range_is_empty(&w64) ? 0 : range_upb(&w64) + 1;
125 visit_type_uint64(v, name, &value, errp);
126}
127
128static void q35_host_get_mmcfg_size(Object *obj, Visitor *v, const char *name,
129 void *opaque, Error **errp)
130{
131 PCIExpressHost *e = PCIE_HOST_BRIDGE(obj);
132 uint32_t value = e->size;
133
134 visit_type_uint32(v, name, &value, errp);
135}
136
137static Property mch_props[] = {
138 DEFINE_PROP_UINT64(PCIE_HOST_MCFG_BASE, Q35PCIHost, parent_obj.base_addr,
139 MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT),
140 DEFINE_PROP_SIZE(PCI_HOST_PROP_PCI_HOLE64_SIZE, Q35PCIHost,
141 mch.pci_hole64_size, DEFAULT_PCI_HOLE64_SIZE),
142 DEFINE_PROP_UINT32("short_root_bus", Q35PCIHost, mch.short_root_bus, 0),
143 DEFINE_PROP_SIZE(PCI_HOST_BELOW_4G_MEM_SIZE, Q35PCIHost,
144 mch.below_4g_mem_size, 0),
145 DEFINE_PROP_SIZE(PCI_HOST_ABOVE_4G_MEM_SIZE, Q35PCIHost,
146 mch.above_4g_mem_size, 0),
147 DEFINE_PROP_END_OF_LIST(),
148};
149
150static void q35_host_class_init(ObjectClass *klass, void *data)
151{
152 DeviceClass *dc = DEVICE_CLASS(klass);
153 PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
154
155 hc->root_bus_path = q35_host_root_bus_path;
156 dc->realize = q35_host_realize;
157 dc->props = mch_props;
158
159 dc->cannot_instantiate_with_device_add_yet = true;
160 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
161 dc->fw_name = "pci";
162}
163
164static void q35_host_initfn(Object *obj)
165{
166 Q35PCIHost *s = Q35_HOST_DEVICE(obj);
167 PCIHostState *phb = PCI_HOST_BRIDGE(obj);
168
169 memory_region_init_io(&phb->conf_mem, obj, &pci_host_conf_le_ops, phb,
170 "pci-conf-idx", 4);
171 memory_region_init_io(&phb->data_mem, obj, &pci_host_data_le_ops, phb,
172 "pci-conf-data", 4);
173
174 object_initialize(&s->mch, sizeof(s->mch), TYPE_MCH_PCI_DEVICE);
175 object_property_add_child(OBJECT(s), "mch", OBJECT(&s->mch), NULL);
176 qdev_prop_set_uint32(DEVICE(&s->mch), "addr", PCI_DEVFN(0, 0));
177 qdev_prop_set_bit(DEVICE(&s->mch), "multifunction", false);
178
179 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_START, "int",
180 q35_host_get_pci_hole_start,
181 NULL, NULL, NULL, NULL);
182
183 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_END, "int",
184 q35_host_get_pci_hole_end,
185 NULL, NULL, NULL, NULL);
186
187 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_START, "int",
188 q35_host_get_pci_hole64_start,
189 NULL, NULL, NULL, NULL);
190
191 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_END, "int",
192 q35_host_get_pci_hole64_end,
193 NULL, NULL, NULL, NULL);
194
195 object_property_add(obj, PCIE_HOST_MCFG_SIZE, "int",
196 q35_host_get_mmcfg_size,
197 NULL, NULL, NULL, NULL);
198
199 object_property_add_link(obj, MCH_HOST_PROP_RAM_MEM, TYPE_MEMORY_REGION,
200 (Object **) &s->mch.ram_memory,
201 qdev_prop_allow_set_link_before_realize, 0, NULL);
202
203 object_property_add_link(obj, MCH_HOST_PROP_PCI_MEM, TYPE_MEMORY_REGION,
204 (Object **) &s->mch.pci_address_space,
205 qdev_prop_allow_set_link_before_realize, 0, NULL);
206
207 object_property_add_link(obj, MCH_HOST_PROP_SYSTEM_MEM, TYPE_MEMORY_REGION,
208 (Object **) &s->mch.system_memory,
209 qdev_prop_allow_set_link_before_realize, 0, NULL);
210
211 object_property_add_link(obj, MCH_HOST_PROP_IO_MEM, TYPE_MEMORY_REGION,
212 (Object **) &s->mch.address_space_io,
213 qdev_prop_allow_set_link_before_realize, 0, NULL);
214
215
216
217
218
219
220 range_set_bounds(&s->mch.pci_hole,
221 MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT + MCH_HOST_BRIDGE_PCIEXBAR_MAX,
222 IO_APIC_DEFAULT_ADDRESS - 1);
223}
224
225static const TypeInfo q35_host_info = {
226 .name = TYPE_Q35_HOST_DEVICE,
227 .parent = TYPE_PCIE_HOST_BRIDGE,
228 .instance_size = sizeof(Q35PCIHost),
229 .instance_init = q35_host_initfn,
230 .class_init = q35_host_class_init,
231};
232
233
234
235
236
237static uint64_t tseg_blackhole_read(void *ptr, hwaddr reg, unsigned size)
238{
239 return 0xffffffff;
240}
241
242static void tseg_blackhole_write(void *opaque, hwaddr addr, uint64_t val,
243 unsigned width)
244{
245
246}
247
248static const MemoryRegionOps tseg_blackhole_ops = {
249 .read = tseg_blackhole_read,
250 .write = tseg_blackhole_write,
251 .endianness = DEVICE_NATIVE_ENDIAN,
252 .valid.min_access_size = 1,
253 .valid.max_access_size = 4,
254 .impl.min_access_size = 4,
255 .impl.max_access_size = 4,
256 .endianness = DEVICE_LITTLE_ENDIAN,
257};
258
259
260static void mch_update_pciexbar(MCHPCIState *mch)
261{
262 PCIDevice *pci_dev = PCI_DEVICE(mch);
263 BusState *bus = qdev_get_parent_bus(DEVICE(mch));
264 PCIExpressHost *pehb = PCIE_HOST_BRIDGE(bus->parent);
265
266 uint64_t pciexbar;
267 int enable;
268 uint64_t addr;
269 uint64_t addr_mask;
270 uint32_t length;
271
272 pciexbar = pci_get_quad(pci_dev->config + MCH_HOST_BRIDGE_PCIEXBAR);
273 enable = pciexbar & MCH_HOST_BRIDGE_PCIEXBAREN;
274 addr_mask = MCH_HOST_BRIDGE_PCIEXBAR_ADMSK;
275 switch (pciexbar & MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_MASK) {
276 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_256M:
277 length = 256 * 1024 * 1024;
278 break;
279 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_128M:
280 length = 128 * 1024 * 1024;
281 addr_mask |= MCH_HOST_BRIDGE_PCIEXBAR_128ADMSK |
282 MCH_HOST_BRIDGE_PCIEXBAR_64ADMSK;
283 break;
284 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_64M:
285 length = 64 * 1024 * 1024;
286 addr_mask |= MCH_HOST_BRIDGE_PCIEXBAR_64ADMSK;
287 break;
288 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_RVD:
289 default:
290 abort();
291 }
292 addr = pciexbar & addr_mask;
293 pcie_host_mmcfg_update(pehb, enable, addr, length);
294
295
296
297
298
299 if (enable) {
300 range_set_bounds(&mch->pci_hole,
301 addr + length,
302 IO_APIC_DEFAULT_ADDRESS - 1);
303 } else {
304 range_set_bounds(&mch->pci_hole,
305 MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT,
306 IO_APIC_DEFAULT_ADDRESS - 1);
307 }
308}
309
310
311static void mch_update_pam(MCHPCIState *mch)
312{
313 PCIDevice *pd = PCI_DEVICE(mch);
314 int i;
315
316 memory_region_transaction_begin();
317 for (i = 0; i < 13; i++) {
318 pam_update(&mch->pam_regions[i], i,
319 pd->config[MCH_HOST_BRIDGE_PAM0 + ((i + 1) / 2)]);
320 }
321 memory_region_transaction_commit();
322}
323
324
325static void mch_update_smram(MCHPCIState *mch)
326{
327 PCIDevice *pd = PCI_DEVICE(mch);
328 bool h_smrame = (pd->config[MCH_HOST_BRIDGE_ESMRAMC] & MCH_HOST_BRIDGE_ESMRAMC_H_SMRAME);
329 uint32_t tseg_size;
330
331
332 if (pd->config[MCH_HOST_BRIDGE_SMRAM] & MCH_HOST_BRIDGE_SMRAM_D_LCK) {
333 pd->config[MCH_HOST_BRIDGE_SMRAM] &= ~MCH_HOST_BRIDGE_SMRAM_D_OPEN;
334 pd->wmask[MCH_HOST_BRIDGE_SMRAM] = MCH_HOST_BRIDGE_SMRAM_WMASK_LCK;
335 pd->wmask[MCH_HOST_BRIDGE_ESMRAMC] = MCH_HOST_BRIDGE_ESMRAMC_WMASK_LCK;
336 }
337
338 memory_region_transaction_begin();
339
340 if (pd->config[MCH_HOST_BRIDGE_SMRAM] & SMRAM_D_OPEN) {
341
342 memory_region_set_enabled(&mch->smram_region, h_smrame);
343
344 memory_region_set_enabled(&mch->open_high_smram, h_smrame);
345 } else {
346
347 memory_region_set_enabled(&mch->smram_region, true);
348 memory_region_set_enabled(&mch->open_high_smram, false);
349 }
350
351 if (pd->config[MCH_HOST_BRIDGE_SMRAM] & SMRAM_G_SMRAME) {
352 memory_region_set_enabled(&mch->low_smram, !h_smrame);
353 memory_region_set_enabled(&mch->high_smram, h_smrame);
354 } else {
355 memory_region_set_enabled(&mch->low_smram, false);
356 memory_region_set_enabled(&mch->high_smram, false);
357 }
358
359 if (pd->config[MCH_HOST_BRIDGE_ESMRAMC] & MCH_HOST_BRIDGE_ESMRAMC_T_EN) {
360 switch (pd->config[MCH_HOST_BRIDGE_ESMRAMC] &
361 MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_MASK) {
362 case MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_1MB:
363 tseg_size = 1024 * 1024;
364 break;
365 case MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_2MB:
366 tseg_size = 1024 * 1024 * 2;
367 break;
368 case MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_8MB:
369 tseg_size = 1024 * 1024 * 8;
370 break;
371 default:
372 tseg_size = 0;
373 break;
374 }
375 } else {
376 tseg_size = 0;
377 }
378 memory_region_del_subregion(mch->system_memory, &mch->tseg_blackhole);
379 memory_region_set_enabled(&mch->tseg_blackhole, tseg_size);
380 memory_region_set_size(&mch->tseg_blackhole, tseg_size);
381 memory_region_add_subregion_overlap(mch->system_memory,
382 mch->below_4g_mem_size - tseg_size,
383 &mch->tseg_blackhole, 1);
384
385 memory_region_set_enabled(&mch->tseg_window, tseg_size);
386 memory_region_set_size(&mch->tseg_window, tseg_size);
387 memory_region_set_address(&mch->tseg_window,
388 mch->below_4g_mem_size - tseg_size);
389 memory_region_set_alias_offset(&mch->tseg_window,
390 mch->below_4g_mem_size - tseg_size);
391
392 memory_region_transaction_commit();
393}
394
395static void mch_write_config(PCIDevice *d,
396 uint32_t address, uint32_t val, int len)
397{
398 MCHPCIState *mch = MCH_PCI_DEVICE(d);
399
400 pci_default_write_config(d, address, val, len);
401
402 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_PAM0,
403 MCH_HOST_BRIDGE_PAM_SIZE)) {
404 mch_update_pam(mch);
405 }
406
407 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_PCIEXBAR,
408 MCH_HOST_BRIDGE_PCIEXBAR_SIZE)) {
409 mch_update_pciexbar(mch);
410 }
411
412 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_SMRAM,
413 MCH_HOST_BRIDGE_SMRAM_SIZE)) {
414 mch_update_smram(mch);
415 }
416}
417
418static void mch_update(MCHPCIState *mch)
419{
420 mch_update_pciexbar(mch);
421 mch_update_pam(mch);
422 mch_update_smram(mch);
423}
424
425static int mch_post_load(void *opaque, int version_id)
426{
427 MCHPCIState *mch = opaque;
428 mch_update(mch);
429 return 0;
430}
431
432static const VMStateDescription vmstate_mch = {
433 .name = "mch",
434 .version_id = 1,
435 .minimum_version_id = 1,
436 .post_load = mch_post_load,
437 .fields = (VMStateField[]) {
438 VMSTATE_PCI_DEVICE(parent_obj, MCHPCIState),
439
440
441
442 VMSTATE_UNUSED(1),
443 VMSTATE_END_OF_LIST()
444 }
445};
446
447static void mch_reset(DeviceState *qdev)
448{
449 PCIDevice *d = PCI_DEVICE(qdev);
450 MCHPCIState *mch = MCH_PCI_DEVICE(d);
451
452 pci_set_quad(d->config + MCH_HOST_BRIDGE_PCIEXBAR,
453 MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT);
454
455 d->config[MCH_HOST_BRIDGE_SMRAM] = MCH_HOST_BRIDGE_SMRAM_DEFAULT;
456 d->config[MCH_HOST_BRIDGE_ESMRAMC] = MCH_HOST_BRIDGE_ESMRAMC_DEFAULT;
457 d->wmask[MCH_HOST_BRIDGE_SMRAM] = MCH_HOST_BRIDGE_SMRAM_WMASK;
458 d->wmask[MCH_HOST_BRIDGE_ESMRAMC] = MCH_HOST_BRIDGE_ESMRAMC_WMASK;
459
460 mch_update(mch);
461}
462
463static void mch_realize(PCIDevice *d, Error **errp)
464{
465 int i;
466 MCHPCIState *mch = MCH_PCI_DEVICE(d);
467
468
469 pc_pci_as_mapping_init(OBJECT(mch), mch->system_memory,
470 mch->pci_address_space);
471
472
473 memory_region_init_alias(&mch->smram_region, OBJECT(mch), "smram-region",
474 mch->pci_address_space, 0xa0000, 0x20000);
475 memory_region_add_subregion_overlap(mch->system_memory, 0xa0000,
476 &mch->smram_region, 1);
477 memory_region_set_enabled(&mch->smram_region, true);
478
479 memory_region_init_alias(&mch->open_high_smram, OBJECT(mch), "smram-open-high",
480 mch->ram_memory, 0xa0000, 0x20000);
481 memory_region_add_subregion_overlap(mch->system_memory, 0xfeda0000,
482 &mch->open_high_smram, 1);
483 memory_region_set_enabled(&mch->open_high_smram, false);
484
485
486 memory_region_init(&mch->smram, OBJECT(mch), "smram", 1ull << 32);
487 memory_region_set_enabled(&mch->smram, true);
488 memory_region_init_alias(&mch->low_smram, OBJECT(mch), "smram-low",
489 mch->ram_memory, 0xa0000, 0x20000);
490 memory_region_set_enabled(&mch->low_smram, true);
491 memory_region_add_subregion(&mch->smram, 0xa0000, &mch->low_smram);
492 memory_region_init_alias(&mch->high_smram, OBJECT(mch), "smram-high",
493 mch->ram_memory, 0xa0000, 0x20000);
494 memory_region_set_enabled(&mch->high_smram, true);
495 memory_region_add_subregion(&mch->smram, 0xfeda0000, &mch->high_smram);
496
497 memory_region_init_io(&mch->tseg_blackhole, OBJECT(mch),
498 &tseg_blackhole_ops, NULL,
499 "tseg-blackhole", 0);
500 memory_region_set_enabled(&mch->tseg_blackhole, false);
501 memory_region_add_subregion_overlap(mch->system_memory,
502 mch->below_4g_mem_size,
503 &mch->tseg_blackhole, 1);
504
505 memory_region_init_alias(&mch->tseg_window, OBJECT(mch), "tseg-window",
506 mch->ram_memory, mch->below_4g_mem_size, 0);
507 memory_region_set_enabled(&mch->tseg_window, false);
508 memory_region_add_subregion(&mch->smram, mch->below_4g_mem_size,
509 &mch->tseg_window);
510 object_property_add_const_link(qdev_get_machine(), "smram",
511 OBJECT(&mch->smram), &error_abort);
512
513 init_pam(DEVICE(mch), mch->ram_memory, mch->system_memory,
514 mch->pci_address_space, &mch->pam_regions[0],
515 PAM_BIOS_BASE, PAM_BIOS_SIZE);
516 for (i = 0; i < 12; ++i) {
517 init_pam(DEVICE(mch), mch->ram_memory, mch->system_memory,
518 mch->pci_address_space, &mch->pam_regions[i+1],
519 PAM_EXPAN_BASE + i * PAM_EXPAN_SIZE, PAM_EXPAN_SIZE);
520 }
521}
522
523uint64_t mch_mcfg_base(void)
524{
525 bool ambiguous;
526 Object *o = object_resolve_path_type("", TYPE_MCH_PCI_DEVICE, &ambiguous);
527 if (!o) {
528 return 0;
529 }
530 return MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT;
531}
532
533static void mch_class_init(ObjectClass *klass, void *data)
534{
535 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
536 DeviceClass *dc = DEVICE_CLASS(klass);
537
538 k->realize = mch_realize;
539 k->config_write = mch_write_config;
540 dc->reset = mch_reset;
541 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
542 dc->desc = "Host bridge";
543 dc->vmsd = &vmstate_mch;
544 k->vendor_id = PCI_VENDOR_ID_INTEL;
545 k->device_id = PCI_DEVICE_ID_INTEL_Q35_MCH;
546 k->revision = MCH_HOST_BRIDGE_REVISION_DEFAULT;
547 k->class_id = PCI_CLASS_BRIDGE_HOST;
548
549
550
551
552 dc->cannot_instantiate_with_device_add_yet = true;
553}
554
555static const TypeInfo mch_info = {
556 .name = TYPE_MCH_PCI_DEVICE,
557 .parent = TYPE_PCI_DEVICE,
558 .instance_size = sizeof(MCHPCIState),
559 .class_init = mch_class_init,
560};
561
562static void q35_register(void)
563{
564 type_register_static(&mch_info);
565 type_register_static(&q35_host_info);
566}
567
568type_init(q35_register);
569
