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i386: Remove AMD feature flag aliases from Opteron models
[qemu/kevin.git] / hw / pci / pci.c
blobfe9acecbbf539d18be345413fe836ab126790e98
1 /*
2 * QEMU PCI bus manager
3 *
4 * Copyright (c) 2004 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu/osdep.h"
25 #include "hw/hw.h"
26 #include "hw/pci/pci.h"
27 #include "hw/pci/pci_bridge.h"
28 #include "hw/pci/pci_bus.h"
29 #include "hw/pci/pci_host.h"
30 #include "monitor/monitor.h"
31 #include "net/net.h"
32 #include "sysemu/sysemu.h"
33 #include "hw/loader.h"
34 #include "qemu/error-report.h"
35 #include "qemu/range.h"
36 #include "qmp-commands.h"
37 #include "trace.h"
38 #include "hw/pci/msi.h"
39 #include "hw/pci/msix.h"
40 #include "exec/address-spaces.h"
41 #include "hw/hotplug.h"
42 #include "hw/boards.h"
43 #include "qemu/cutils.h"
44
45 //#define DEBUG_PCI
46 #ifdef DEBUG_PCI
47 # define PCI_DPRINTF(format, ...) printf(format, ## __VA_ARGS__)
48 #else
49 # define PCI_DPRINTF(format, ...) do { } while (0)
50 #endif
51
52 static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent);
53 static char *pcibus_get_dev_path(DeviceState *dev);
54 static char *pcibus_get_fw_dev_path(DeviceState *dev);
55 static void pcibus_reset(BusState *qbus);
56
57 static Property pci_props[] = {
58 DEFINE_PROP_PCI_DEVFN("addr", PCIDevice, devfn, -1),
59 DEFINE_PROP_STRING("romfile", PCIDevice, romfile),
60 DEFINE_PROP_UINT32("rombar", PCIDevice, rom_bar, 1),
61 DEFINE_PROP_BIT("multifunction", PCIDevice, cap_present,
62 QEMU_PCI_CAP_MULTIFUNCTION_BITNR, false),
63 DEFINE_PROP_BIT("command_serr_enable", PCIDevice, cap_present,
64 QEMU_PCI_CAP_SERR_BITNR, true),
65 DEFINE_PROP_BIT("x-pcie-lnksta-dllla", PCIDevice, cap_present,
66 QEMU_PCIE_LNKSTA_DLLLA_BITNR, true),
67 DEFINE_PROP_END_OF_LIST()
68 };
69
70 static const VMStateDescription vmstate_pcibus = {
71 .name = "PCIBUS",
72 .version_id = 1,
73 .minimum_version_id = 1,
74 .fields = (VMStateField[]) {
75 VMSTATE_INT32_EQUAL(nirq, PCIBus),
76 VMSTATE_VARRAY_INT32(irq_count, PCIBus,
77 nirq, 0, vmstate_info_int32,
78 int32_t),
79 VMSTATE_END_OF_LIST()
80 }
81 };
82
83 static void pci_init_bus_master(PCIDevice *pci_dev)
84 {
85 AddressSpace *dma_as = pci_device_iommu_address_space(pci_dev);
86
87 memory_region_init_alias(&pci_dev->bus_master_enable_region,
88 OBJECT(pci_dev), "bus master",
89 dma_as->root, 0, memory_region_size(dma_as->root));
90 memory_region_set_enabled(&pci_dev->bus_master_enable_region, false);
91 address_space_init(&pci_dev->bus_master_as,
92 &pci_dev->bus_master_enable_region, pci_dev->name);
93 }
94
95 static void pcibus_machine_done(Notifier *notifier, void *data)
96 {
97 PCIBus *bus = container_of(notifier, PCIBus, machine_done);
98 int i;
99
100 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) {
101 if (bus->devices[i]) {
102 pci_init_bus_master(bus->devices[i]);
103 }
104 }
105 }
106
107 static void pci_bus_realize(BusState *qbus, Error **errp)
108 {
109 PCIBus *bus = PCI_BUS(qbus);
110
111 bus->machine_done.notify = pcibus_machine_done;
112 qemu_add_machine_init_done_notifier(&bus->machine_done);
113
114 vmstate_register(NULL, -1, &vmstate_pcibus, bus);
115 }
116
117 static void pci_bus_unrealize(BusState *qbus, Error **errp)
118 {
119 PCIBus *bus = PCI_BUS(qbus);
120
121 qemu_remove_machine_init_done_notifier(&bus->machine_done);
122
123 vmstate_unregister(NULL, &vmstate_pcibus, bus);
124 }
125
126 static bool pcibus_is_root(PCIBus *bus)
127 {
128 return !bus->parent_dev;
129 }
130
131 static int pcibus_num(PCIBus *bus)
132 {
133 if (pcibus_is_root(bus)) {
134 return 0; /* pci host bridge */
135 }
136 return bus->parent_dev->config[PCI_SECONDARY_BUS];
137 }
138
139 static uint16_t pcibus_numa_node(PCIBus *bus)
140 {
141 return NUMA_NODE_UNASSIGNED;
142 }
143
144 static void pci_bus_class_init(ObjectClass *klass, void *data)
145 {
146 BusClass *k = BUS_CLASS(klass);
147 PCIBusClass *pbc = PCI_BUS_CLASS(klass);
148
149 k->print_dev = pcibus_dev_print;
150 k->get_dev_path = pcibus_get_dev_path;
151 k->get_fw_dev_path = pcibus_get_fw_dev_path;
152 k->realize = pci_bus_realize;
153 k->unrealize = pci_bus_unrealize;
154 k->reset = pcibus_reset;
155
156 pbc->is_root = pcibus_is_root;
157 pbc->bus_num = pcibus_num;
158 pbc->numa_node = pcibus_numa_node;
159 }
160
161 static const TypeInfo pci_bus_info = {
162 .name = TYPE_PCI_BUS,
163 .parent = TYPE_BUS,
164 .instance_size = sizeof(PCIBus),
165 .class_size = sizeof(PCIBusClass),
166 .class_init = pci_bus_class_init,
167 };
168
169 static const TypeInfo pcie_bus_info = {
170 .name = TYPE_PCIE_BUS,
171 .parent = TYPE_PCI_BUS,
172 };
173
174 static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num);
175 static void pci_update_mappings(PCIDevice *d);
176 static void pci_irq_handler(void *opaque, int irq_num, int level);
177 static void pci_add_option_rom(PCIDevice *pdev, bool is_default_rom, Error **);
178 static void pci_del_option_rom(PCIDevice *pdev);
179
180 static uint16_t pci_default_sub_vendor_id = PCI_SUBVENDOR_ID_REDHAT_QUMRANET;
181 static uint16_t pci_default_sub_device_id = PCI_SUBDEVICE_ID_QEMU;
182
183 static QLIST_HEAD(, PCIHostState) pci_host_bridges;
184
185 int pci_bar(PCIDevice *d, int reg)
186 {
187 uint8_t type;
188
189 if (reg != PCI_ROM_SLOT)
190 return PCI_BASE_ADDRESS_0 + reg * 4;
191
192 type = d->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION;
193 return type == PCI_HEADER_TYPE_BRIDGE ? PCI_ROM_ADDRESS1 : PCI_ROM_ADDRESS;
194 }
195
196 static inline int pci_irq_state(PCIDevice *d, int irq_num)
197 {
198 return (d->irq_state >> irq_num) & 0x1;
199 }
200
201 static inline void pci_set_irq_state(PCIDevice *d, int irq_num, int level)
202 {
203 d->irq_state &= ~(0x1 << irq_num);
204 d->irq_state |= level << irq_num;
205 }
206
207 static void pci_change_irq_level(PCIDevice *pci_dev, int irq_num, int change)
208 {
209 PCIBus *bus;
210 for (;;) {
211 bus = pci_dev->bus;
212 irq_num = bus->map_irq(pci_dev, irq_num);
213 if (bus->set_irq)
214 break;
215 pci_dev = bus->parent_dev;
216 }
217 bus->irq_count[irq_num] += change;
218 bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0);
219 }
220
221 int pci_bus_get_irq_level(PCIBus *bus, int irq_num)
222 {
223 assert(irq_num >= 0);
224 assert(irq_num < bus->nirq);
225 return !!bus->irq_count[irq_num];
226 }
227
228 /* Update interrupt status bit in config space on interrupt
229 * state change. */
230 static void pci_update_irq_status(PCIDevice *dev)
231 {
232 if (dev->irq_state) {
233 dev->config[PCI_STATUS] |= PCI_STATUS_INTERRUPT;
234 } else {
235 dev->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT;
236 }
237 }
238
239 void pci_device_deassert_intx(PCIDevice *dev)
240 {
241 int i;
242 for (i = 0; i < PCI_NUM_PINS; ++i) {
243 pci_irq_handler(dev, i, 0);
244 }
245 }
246
247 static void pci_do_device_reset(PCIDevice *dev)
248 {
249 int r;
250
251 pci_device_deassert_intx(dev);
252 assert(dev->irq_state == 0);
253
254 /* Clear all writable bits */
255 pci_word_test_and_clear_mask(dev->config + PCI_COMMAND,
256 pci_get_word(dev->wmask + PCI_COMMAND) |
257 pci_get_word(dev->w1cmask + PCI_COMMAND));
258 pci_word_test_and_clear_mask(dev->config + PCI_STATUS,
259 pci_get_word(dev->wmask + PCI_STATUS) |
260 pci_get_word(dev->w1cmask + PCI_STATUS));
261 dev->config[PCI_CACHE_LINE_SIZE] = 0x0;
262 dev->config[PCI_INTERRUPT_LINE] = 0x0;
263 for (r = 0; r < PCI_NUM_REGIONS; ++r) {
264 PCIIORegion *region = &dev->io_regions[r];
265 if (!region->size) {
266 continue;
267 }
268
269 if (!(region->type & PCI_BASE_ADDRESS_SPACE_IO) &&
270 region->type & PCI_BASE_ADDRESS_MEM_TYPE_64) {
271 pci_set_quad(dev->config + pci_bar(dev, r), region->type);
272 } else {
273 pci_set_long(dev->config + pci_bar(dev, r), region->type);
274 }
275 }
276 pci_update_mappings(dev);
277
278 msi_reset(dev);
279 msix_reset(dev);
280 }
281
282 /*
283 * This function is called on #RST and FLR.
284 * FLR if PCI_EXP_DEVCTL_BCR_FLR is set
285 */
286 void pci_device_reset(PCIDevice *dev)
287 {
288 qdev_reset_all(&dev->qdev);
289 pci_do_device_reset(dev);
290 }
291
292 /*
293 * Trigger pci bus reset under a given bus.
294 * Called via qbus_reset_all on RST# assert, after the devices
295 * have been reset qdev_reset_all-ed already.
296 */
297 static void pcibus_reset(BusState *qbus)
298 {
299 PCIBus *bus = DO_UPCAST(PCIBus, qbus, qbus);
300 int i;
301
302 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) {
303 if (bus->devices[i]) {
304 pci_do_device_reset(bus->devices[i]);
305 }
306 }
307
308 for (i = 0; i < bus->nirq; i++) {
309 assert(bus->irq_count[i] == 0);
310 }
311 }
312
313 static void pci_host_bus_register(DeviceState *host)
314 {
315 PCIHostState *host_bridge = PCI_HOST_BRIDGE(host);
316
317 QLIST_INSERT_HEAD(&pci_host_bridges, host_bridge, next);
318 }
319
320 PCIBus *pci_find_primary_bus(void)
321 {
322 PCIBus *primary_bus = NULL;
323 PCIHostState *host;
324
325 QLIST_FOREACH(host, &pci_host_bridges, next) {
326 if (primary_bus) {
327 /* We have multiple root buses, refuse to select a primary */
328 return NULL;
329 }
330 primary_bus = host->bus;
331 }
332
333 return primary_bus;
334 }
335
336 PCIBus *pci_device_root_bus(const PCIDevice *d)
337 {
338 PCIBus *bus = d->bus;
339
340 while (!pci_bus_is_root(bus)) {
341 d = bus->parent_dev;
342 assert(d != NULL);
343
344 bus = d->bus;
345 }
346
347 return bus;
348 }
349
350 const char *pci_root_bus_path(PCIDevice *dev)
351 {
352 PCIBus *rootbus = pci_device_root_bus(dev);
353 PCIHostState *host_bridge = PCI_HOST_BRIDGE(rootbus->qbus.parent);
354 PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_GET_CLASS(host_bridge);
355
356 assert(host_bridge->bus == rootbus);
357
358 if (hc->root_bus_path) {
359 return (*hc->root_bus_path)(host_bridge, rootbus);
360 }
361
362 return rootbus->qbus.name;
363 }
364
365 static void pci_bus_init(PCIBus *bus, DeviceState *parent,
366 MemoryRegion *address_space_mem,
367 MemoryRegion *address_space_io,
368 uint8_t devfn_min)
369 {
370 assert(PCI_FUNC(devfn_min) == 0);
371 bus->devfn_min = devfn_min;
372 bus->address_space_mem = address_space_mem;
373 bus->address_space_io = address_space_io;
374
375 /* host bridge */
376 QLIST_INIT(&bus->child);
377
378 pci_host_bus_register(parent);
379 }
380
381 bool pci_bus_is_express(PCIBus *bus)
382 {
383 return object_dynamic_cast(OBJECT(bus), TYPE_PCIE_BUS);
384 }
385
386 bool pci_bus_is_root(PCIBus *bus)
387 {
388 return PCI_BUS_GET_CLASS(bus)->is_root(bus);
389 }
390
391 void pci_bus_new_inplace(PCIBus *bus, size_t bus_size, DeviceState *parent,
392 const char *name,
393 MemoryRegion *address_space_mem,
394 MemoryRegion *address_space_io,
395 uint8_t devfn_min, const char *typename)
396 {
397 qbus_create_inplace(bus, bus_size, typename, parent, name);
398 pci_bus_init(bus, parent, address_space_mem, address_space_io, devfn_min);
399 }
400
401 PCIBus *pci_bus_new(DeviceState *parent, const char *name,
402 MemoryRegion *address_space_mem,
403 MemoryRegion *address_space_io,
404 uint8_t devfn_min, const char *typename)
405 {
406 PCIBus *bus;
407
408 bus = PCI_BUS(qbus_create(typename, parent, name));
409 pci_bus_init(bus, parent, address_space_mem, address_space_io, devfn_min);
410 return bus;
411 }
412
413 void pci_bus_irqs(PCIBus *bus, pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
414 void *irq_opaque, int nirq)
415 {
416 bus->set_irq = set_irq;
417 bus->map_irq = map_irq;
418 bus->irq_opaque = irq_opaque;
419 bus->nirq = nirq;
420 bus->irq_count = g_malloc0(nirq * sizeof(bus->irq_count[0]));
421 }
422
423 PCIBus *pci_register_bus(DeviceState *parent, const char *name,
424 pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
425 void *irq_opaque,
426 MemoryRegion *address_space_mem,
427 MemoryRegion *address_space_io,
428 uint8_t devfn_min, int nirq, const char *typename)
429 {
430 PCIBus *bus;
431
432 bus = pci_bus_new(parent, name, address_space_mem,
433 address_space_io, devfn_min, typename);
434 pci_bus_irqs(bus, set_irq, map_irq, irq_opaque, nirq);
435 return bus;
436 }
437
438 int pci_bus_num(PCIBus *s)
439 {
440 return PCI_BUS_GET_CLASS(s)->bus_num(s);
441 }
442
443 int pci_bus_numa_node(PCIBus *bus)
444 {
445 return PCI_BUS_GET_CLASS(bus)->numa_node(bus);
446 }
447
448 static int get_pci_config_device(QEMUFile *f, void *pv, size_t size)
449 {
450 PCIDevice *s = container_of(pv, PCIDevice, config);
451 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(s);
452 uint8_t *config;
453 int i;
454
455 assert(size == pci_config_size(s));
456 config = g_malloc(size);
457
458 qemu_get_buffer(f, config, size);
459 for (i = 0; i < size; ++i) {
460 if ((config[i] ^ s->config[i]) &
461 s->cmask[i] & ~s->wmask[i] & ~s->w1cmask[i]) {
462 error_report("%s: Bad config data: i=0x%x read: %x device: %x "
463 "cmask: %x wmask: %x w1cmask:%x", __func__,
464 i, config[i], s->config[i],
465 s->cmask[i], s->wmask[i], s->w1cmask[i]);
466 g_free(config);
467 return -EINVAL;
468 }
469 }
470 memcpy(s->config, config, size);
471
472 pci_update_mappings(s);
473 if (pc->is_bridge) {
474 PCIBridge *b = PCI_BRIDGE(s);
475 pci_bridge_update_mappings(b);
476 }
477
478 memory_region_set_enabled(&s->bus_master_enable_region,
479 pci_get_word(s->config + PCI_COMMAND)
480 & PCI_COMMAND_MASTER);
481
482 g_free(config);
483 return 0;
484 }
485
486 /* just put buffer */
487 static void put_pci_config_device(QEMUFile *f, void *pv, size_t size)
488 {
489 const uint8_t **v = pv;
490 assert(size == pci_config_size(container_of(pv, PCIDevice, config)));
491 qemu_put_buffer(f, *v, size);
492 }
493
494 static VMStateInfo vmstate_info_pci_config = {
495 .name = "pci config",
496 .get = get_pci_config_device,
497 .put = put_pci_config_device,
498 };
499
500 static int get_pci_irq_state(QEMUFile *f, void *pv, size_t size)
501 {
502 PCIDevice *s = container_of(pv, PCIDevice, irq_state);
503 uint32_t irq_state[PCI_NUM_PINS];
504 int i;
505 for (i = 0; i < PCI_NUM_PINS; ++i) {
506 irq_state[i] = qemu_get_be32(f);
507 if (irq_state[i] != 0x1 && irq_state[i] != 0) {
508 fprintf(stderr, "irq state %d: must be 0 or 1.\n",
509 irq_state[i]);
510 return -EINVAL;
511 }
512 }
513
514 for (i = 0; i < PCI_NUM_PINS; ++i) {
515 pci_set_irq_state(s, i, irq_state[i]);
516 }
517
518 return 0;
519 }
520
521 static void put_pci_irq_state(QEMUFile *f, void *pv, size_t size)
522 {
523 int i;
524 PCIDevice *s = container_of(pv, PCIDevice, irq_state);
525
526 for (i = 0; i < PCI_NUM_PINS; ++i) {
527 qemu_put_be32(f, pci_irq_state(s, i));
528 }
529 }
530
531 static VMStateInfo vmstate_info_pci_irq_state = {
532 .name = "pci irq state",
533 .get = get_pci_irq_state,
534 .put = put_pci_irq_state,
535 };
536
537 const VMStateDescription vmstate_pci_device = {
538 .name = "PCIDevice",
539 .version_id = 2,
540 .minimum_version_id = 1,
541 .fields = (VMStateField[]) {
542 VMSTATE_INT32_POSITIVE_LE(version_id, PCIDevice),
543 VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0,
544 vmstate_info_pci_config,
545 PCI_CONFIG_SPACE_SIZE),
546 VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2,
547 vmstate_info_pci_irq_state,
548 PCI_NUM_PINS * sizeof(int32_t)),
549 VMSTATE_END_OF_LIST()
550 }
551 };
552
553 const VMStateDescription vmstate_pcie_device = {
554 .name = "PCIEDevice",
555 .version_id = 2,
556 .minimum_version_id = 1,
557 .fields = (VMStateField[]) {
558 VMSTATE_INT32_POSITIVE_LE(version_id, PCIDevice),
559 VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0,
560 vmstate_info_pci_config,
561 PCIE_CONFIG_SPACE_SIZE),
562 VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2,
563 vmstate_info_pci_irq_state,
564 PCI_NUM_PINS * sizeof(int32_t)),
565 VMSTATE_END_OF_LIST()
566 }
567 };
568
569 static inline const VMStateDescription *pci_get_vmstate(PCIDevice *s)
570 {
571 return pci_is_express(s) ? &vmstate_pcie_device : &vmstate_pci_device;
572 }
573
574 void pci_device_save(PCIDevice *s, QEMUFile *f)
575 {
576 /* Clear interrupt status bit: it is implicit
577 * in irq_state which we are saving.
578 * This makes us compatible with old devices
579 * which never set or clear this bit. */
580 s->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT;
581 vmstate_save_state(f, pci_get_vmstate(s), s, NULL);
582 /* Restore the interrupt status bit. */
583 pci_update_irq_status(s);
584 }
585
586 int pci_device_load(PCIDevice *s, QEMUFile *f)
587 {
588 int ret;
589 ret = vmstate_load_state(f, pci_get_vmstate(s), s, s->version_id);
590 /* Restore the interrupt status bit. */
591 pci_update_irq_status(s);
592 return ret;
593 }
594
595 static void pci_set_default_subsystem_id(PCIDevice *pci_dev)
596 {
597 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID,
598 pci_default_sub_vendor_id);
599 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID,
600 pci_default_sub_device_id);
601 }
602
603 /*
604 * Parse [[<domain>:]<bus>:]<slot>, return -1 on error if funcp == NULL
605 * [[<domain>:]<bus>:]<slot>.<func>, return -1 on error
606 */
607 static int pci_parse_devaddr(const char *addr, int *domp, int *busp,
608 unsigned int *slotp, unsigned int *funcp)
609 {
610 const char *p;
611 char *e;
612 unsigned long val;
613 unsigned long dom = 0, bus = 0;
614 unsigned int slot = 0;
615 unsigned int func = 0;
616
617 p = addr;
618 val = strtoul(p, &e, 16);
619 if (e == p)
620 return -1;
621 if (*e == ':') {
622 bus = val;
623 p = e + 1;
624 val = strtoul(p, &e, 16);
625 if (e == p)
626 return -1;
627 if (*e == ':') {
628 dom = bus;
629 bus = val;
630 p = e + 1;
631 val = strtoul(p, &e, 16);
632 if (e == p)
633 return -1;
634 }
635 }
636
637 slot = val;
638
639 if (funcp != NULL) {
640 if (*e != '.')
641 return -1;
642
643 p = e + 1;
644 val = strtoul(p, &e, 16);
645 if (e == p)
646 return -1;
647
648 func = val;
649 }
650
651 /* if funcp == NULL func is 0 */
652 if (dom > 0xffff || bus > 0xff || slot > 0x1f || func > 7)
653 return -1;
654
655 if (*e)
656 return -1;
657
658 *domp = dom;
659 *busp = bus;
660 *slotp = slot;
661 if (funcp != NULL)
662 *funcp = func;
663 return 0;
664 }
665
666 static PCIBus *pci_get_bus_devfn(int *devfnp, PCIBus *root,
667 const char *devaddr)
668 {
669 int dom, bus;
670 unsigned slot;
671
672 if (!root) {
673 fprintf(stderr, "No primary PCI bus\n");
674 return NULL;
675 }
676
677 assert(!root->parent_dev);
678
679 if (!devaddr) {
680 *devfnp = -1;
681 return pci_find_bus_nr(root, 0);
682 }
683
684 if (pci_parse_devaddr(devaddr, &dom, &bus, &slot, NULL) < 0) {
685 return NULL;
686 }
687
688 if (dom != 0) {
689 fprintf(stderr, "No support for non-zero PCI domains\n");
690 return NULL;
691 }
692
693 *devfnp = PCI_DEVFN(slot, 0);
694 return pci_find_bus_nr(root, bus);
695 }
696
697 static void pci_init_cmask(PCIDevice *dev)
698 {
699 pci_set_word(dev->cmask + PCI_VENDOR_ID, 0xffff);
700 pci_set_word(dev->cmask + PCI_DEVICE_ID, 0xffff);
701 dev->cmask[PCI_STATUS] = PCI_STATUS_CAP_LIST;
702 dev->cmask[PCI_REVISION_ID] = 0xff;
703 dev->cmask[PCI_CLASS_PROG] = 0xff;
704 pci_set_word(dev->cmask + PCI_CLASS_DEVICE, 0xffff);
705 dev->cmask[PCI_HEADER_TYPE] = 0xff;
706 dev->cmask[PCI_CAPABILITY_LIST] = 0xff;
707 }
708
709 static void pci_init_wmask(PCIDevice *dev)
710 {
711 int config_size = pci_config_size(dev);
712
713 dev->wmask[PCI_CACHE_LINE_SIZE] = 0xff;
714 dev->wmask[PCI_INTERRUPT_LINE] = 0xff;
715 pci_set_word(dev->wmask + PCI_COMMAND,
716 PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
717 PCI_COMMAND_INTX_DISABLE);
718 if (dev->cap_present & QEMU_PCI_CAP_SERR) {
719 pci_word_test_and_set_mask(dev->wmask + PCI_COMMAND, PCI_COMMAND_SERR);
720 }
721
722 memset(dev->wmask + PCI_CONFIG_HEADER_SIZE, 0xff,
723 config_size - PCI_CONFIG_HEADER_SIZE);
724 }
725
726 static void pci_init_w1cmask(PCIDevice *dev)
727 {
728 /*
729 * Note: It's okay to set w1cmask even for readonly bits as
730 * long as their value is hardwired to 0.
731 */
732 pci_set_word(dev->w1cmask + PCI_STATUS,
733 PCI_STATUS_PARITY | PCI_STATUS_SIG_TARGET_ABORT |
734 PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_REC_MASTER_ABORT |
735 PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY);
736 }
737
738 static void pci_init_mask_bridge(PCIDevice *d)
739 {
740 /* PCI_PRIMARY_BUS, PCI_SECONDARY_BUS, PCI_SUBORDINATE_BUS and
741 PCI_SEC_LETENCY_TIMER */
742 memset(d->wmask + PCI_PRIMARY_BUS, 0xff, 4);
743
744 /* base and limit */
745 d->wmask[PCI_IO_BASE] = PCI_IO_RANGE_MASK & 0xff;
746 d->wmask[PCI_IO_LIMIT] = PCI_IO_RANGE_MASK & 0xff;
747 pci_set_word(d->wmask + PCI_MEMORY_BASE,
748 PCI_MEMORY_RANGE_MASK & 0xffff);
749 pci_set_word(d->wmask + PCI_MEMORY_LIMIT,
750 PCI_MEMORY_RANGE_MASK & 0xffff);
751 pci_set_word(d->wmask + PCI_PREF_MEMORY_BASE,
752 PCI_PREF_RANGE_MASK & 0xffff);
753 pci_set_word(d->wmask + PCI_PREF_MEMORY_LIMIT,
754 PCI_PREF_RANGE_MASK & 0xffff);
755
756 /* PCI_PREF_BASE_UPPER32 and PCI_PREF_LIMIT_UPPER32 */
757 memset(d->wmask + PCI_PREF_BASE_UPPER32, 0xff, 8);
758
759 /* Supported memory and i/o types */
760 d->config[PCI_IO_BASE] |= PCI_IO_RANGE_TYPE_16;
761 d->config[PCI_IO_LIMIT] |= PCI_IO_RANGE_TYPE_16;
762 pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_BASE,
763 PCI_PREF_RANGE_TYPE_64);
764 pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_LIMIT,
765 PCI_PREF_RANGE_TYPE_64);
766
767 /*
768 * TODO: Bridges default to 10-bit VGA decoding but we currently only
769 * implement 16-bit decoding (no alias support).
770 */
771 pci_set_word(d->wmask + PCI_BRIDGE_CONTROL,
772 PCI_BRIDGE_CTL_PARITY |
773 PCI_BRIDGE_CTL_SERR |
774 PCI_BRIDGE_CTL_ISA |
775 PCI_BRIDGE_CTL_VGA |
776 PCI_BRIDGE_CTL_VGA_16BIT |
777 PCI_BRIDGE_CTL_MASTER_ABORT |
778 PCI_BRIDGE_CTL_BUS_RESET |
779 PCI_BRIDGE_CTL_FAST_BACK |
780 PCI_BRIDGE_CTL_DISCARD |
781 PCI_BRIDGE_CTL_SEC_DISCARD |
782 PCI_BRIDGE_CTL_DISCARD_SERR);
783 /* Below does not do anything as we never set this bit, put here for
784 * completeness. */
785 pci_set_word(d->w1cmask + PCI_BRIDGE_CONTROL,
786 PCI_BRIDGE_CTL_DISCARD_STATUS);
787 d->cmask[PCI_IO_BASE] |= PCI_IO_RANGE_TYPE_MASK;
788 d->cmask[PCI_IO_LIMIT] |= PCI_IO_RANGE_TYPE_MASK;
789 pci_word_test_and_set_mask(d->cmask + PCI_PREF_MEMORY_BASE,
790 PCI_PREF_RANGE_TYPE_MASK);
791 pci_word_test_and_set_mask(d->cmask + PCI_PREF_MEMORY_LIMIT,
792 PCI_PREF_RANGE_TYPE_MASK);
793 }
794
795 static void pci_init_multifunction(PCIBus *bus, PCIDevice *dev, Error **errp)
796 {
797 uint8_t slot = PCI_SLOT(dev->devfn);
798 uint8_t func;
799
800 if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
801 dev->config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION;
802 }
803
804 /*
805 * multifunction bit is interpreted in two ways as follows.
806 * - all functions must set the bit to 1.
807 * Example: Intel X53
808 * - function 0 must set the bit, but the rest function (> 0)
809 * is allowed to leave the bit to 0.
810 * Example: PIIX3(also in qemu), PIIX4(also in qemu), ICH10,
811 *
812 * So OS (at least Linux) checks the bit of only function 0,
813 * and doesn't see the bit of function > 0.
814 *
815 * The below check allows both interpretation.
816 */
817 if (PCI_FUNC(dev->devfn)) {
818 PCIDevice *f0 = bus->devices[PCI_DEVFN(slot, 0)];
819 if (f0 && !(f0->cap_present & QEMU_PCI_CAP_MULTIFUNCTION)) {
820 /* function 0 should set multifunction bit */
821 error_setg(errp, "PCI: single function device can't be populated "
822 "in function %x.%x", slot, PCI_FUNC(dev->devfn));
823 return;
824 }
825 return;
826 }
827
828 if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
829 return;
830 }
831 /* function 0 indicates single function, so function > 0 must be NULL */
832 for (func = 1; func < PCI_FUNC_MAX; ++func) {
833 if (bus->devices[PCI_DEVFN(slot, func)]) {
834 error_setg(errp, "PCI: %x.0 indicates single function, "
835 "but %x.%x is already populated.",
836 slot, slot, func);
837 return;
838 }
839 }
840 }
841
842 static void pci_config_alloc(PCIDevice *pci_dev)
843 {
844 int config_size = pci_config_size(pci_dev);
845
846 pci_dev->config = g_malloc0(config_size);
847 pci_dev->cmask = g_malloc0(config_size);
848 pci_dev->wmask = g_malloc0(config_size);
849 pci_dev->w1cmask = g_malloc0(config_size);
850 pci_dev->used = g_malloc0(config_size);
851 }
852
853 static void pci_config_free(PCIDevice *pci_dev)
854 {
855 g_free(pci_dev->config);
856 g_free(pci_dev->cmask);
857 g_free(pci_dev->wmask);
858 g_free(pci_dev->w1cmask);
859 g_free(pci_dev->used);
860 }
861
862 static void do_pci_unregister_device(PCIDevice *pci_dev)
863 {
864 pci_dev->bus->devices[pci_dev->devfn] = NULL;
865 pci_config_free(pci_dev);
866
867 address_space_destroy(&pci_dev->bus_master_as);
868 }
869
870 /* Extract PCIReqIDCache into BDF format */
871 static uint16_t pci_req_id_cache_extract(PCIReqIDCache *cache)
872 {
873 uint8_t bus_n;
874 uint16_t result;
875
876 switch (cache->type) {
877 case PCI_REQ_ID_BDF:
878 result = pci_get_bdf(cache->dev);
879 break;
880 case PCI_REQ_ID_SECONDARY_BUS:
881 bus_n = pci_bus_num(cache->dev->bus);
882 result = PCI_BUILD_BDF(bus_n, 0);
883 break;
884 default:
885 error_printf("Invalid PCI requester ID cache type: %d\n",
886 cache->type);
887 exit(1);
888 break;
889 }
890
891 return result;
892 }
893
894 /* Parse bridges up to the root complex and return requester ID
895 * cache for specific device. For full PCIe topology, the cache
896 * result would be exactly the same as getting BDF of the device.
897 * However, several tricks are required when system mixed up with
898 * legacy PCI devices and PCIe-to-PCI bridges.
899 *
900 * Here we cache the proxy device (and type) not requester ID since
901 * bus number might change from time to time.
902 */
903 static PCIReqIDCache pci_req_id_cache_get(PCIDevice *dev)
904 {
905 PCIDevice *parent;
906 PCIReqIDCache cache = {
907 .dev = dev,
908 .type = PCI_REQ_ID_BDF,
909 };
910
911 while (!pci_bus_is_root(dev->bus)) {
912 /* We are under PCI/PCIe bridges */
913 parent = dev->bus->parent_dev;
914 if (pci_is_express(parent)) {
915 if (pcie_cap_get_type(parent) == PCI_EXP_TYPE_PCI_BRIDGE) {
916 /* When we pass through PCIe-to-PCI/PCIX bridges, we
917 * override the requester ID using secondary bus
918 * number of parent bridge with zeroed devfn
919 * (pcie-to-pci bridge spec chap 2.3). */
920 cache.type = PCI_REQ_ID_SECONDARY_BUS;
921 cache.dev = dev;
922 }
923 } else {
924 /* Legacy PCI, override requester ID with the bridge's
925 * BDF upstream. When the root complex connects to
926 * legacy PCI devices (including buses), it can only
927 * obtain requester ID info from directly attached
928 * devices. If devices are attached under bridges, only
929 * the requester ID of the bridge that is directly
930 * attached to the root complex can be recognized. */
931 cache.type = PCI_REQ_ID_BDF;
932 cache.dev = parent;
933 }
934 dev = parent;
935 }
936
937 return cache;
938 }
939
940 uint16_t pci_requester_id(PCIDevice *dev)
941 {
942 return pci_req_id_cache_extract(&dev->requester_id_cache);
943 }
944
945 /* -1 for devfn means auto assign */
946 static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus,
947 const char *name, int devfn,
948 Error **errp)
949 {
950 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev);
951 PCIConfigReadFunc *config_read = pc->config_read;
952 PCIConfigWriteFunc *config_write = pc->config_write;
953 Error *local_err = NULL;
954 DeviceState *dev = DEVICE(pci_dev);
955
956 pci_dev->bus = bus;
957 /* Only pci bridges can be attached to extra PCI root buses */
958 if (pci_bus_is_root(bus) && bus->parent_dev && !pc->is_bridge) {
959 error_setg(errp,
960 "PCI: Only PCI/PCIe bridges can be plugged into %s",
961 bus->parent_dev->name);
962 return NULL;
963 }
964
965 if (devfn < 0) {
966 for(devfn = bus->devfn_min ; devfn < ARRAY_SIZE(bus->devices);
967 devfn += PCI_FUNC_MAX) {
968 if (!bus->devices[devfn])
969 goto found;
970 }
971 error_setg(errp, "PCI: no slot/function available for %s, all in use",
972 name);
973 return NULL;
974 found: ;
975 } else if (bus->devices[devfn]) {
976 error_setg(errp, "PCI: slot %d function %d not available for %s,"
977 " in use by %s",
978 PCI_SLOT(devfn), PCI_FUNC(devfn), name,
979 bus->devices[devfn]->name);
980 return NULL;
981 } else if (dev->hotplugged &&
982 pci_get_function_0(pci_dev)) {
983 error_setg(errp, "PCI: slot %d function 0 already ocuppied by %s,"
984 " new func %s cannot be exposed to guest.",
985 PCI_SLOT(pci_get_function_0(pci_dev)->devfn),
986 pci_get_function_0(pci_dev)->name,
987 name);
988
989 return NULL;
990 }
991
992 pci_dev->devfn = devfn;
993 pci_dev->requester_id_cache = pci_req_id_cache_get(pci_dev);
994
995 if (qdev_hotplug) {
996 pci_init_bus_master(pci_dev);
997 }
998 pstrcpy(pci_dev->name, sizeof(pci_dev->name), name);
999 pci_dev->irq_state = 0;
1000 pci_config_alloc(pci_dev);
1001
1002 pci_config_set_vendor_id(pci_dev->config, pc->vendor_id);
1003 pci_config_set_device_id(pci_dev->config, pc->device_id);
1004 pci_config_set_revision(pci_dev->config, pc->revision);
1005 pci_config_set_class(pci_dev->config, pc->class_id);
1006
1007 if (!pc->is_bridge) {
1008 if (pc->subsystem_vendor_id || pc->subsystem_id) {
1009 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID,
1010 pc->subsystem_vendor_id);
1011 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID,
1012 pc->subsystem_id);
1013 } else {
1014 pci_set_default_subsystem_id(pci_dev);
1015 }
1016 } else {
1017 /* subsystem_vendor_id/subsystem_id are only for header type 0 */
1018 assert(!pc->subsystem_vendor_id);
1019 assert(!pc->subsystem_id);
1020 }
1021 pci_init_cmask(pci_dev);
1022 pci_init_wmask(pci_dev);
1023 pci_init_w1cmask(pci_dev);
1024 if (pc->is_bridge) {
1025 pci_init_mask_bridge(pci_dev);
1026 }
1027 pci_init_multifunction(bus, pci_dev, &local_err);
1028 if (local_err) {
1029 error_propagate(errp, local_err);
1030 do_pci_unregister_device(pci_dev);
1031 return NULL;
1032 }
1033
1034 if (!config_read)
1035 config_read = pci_default_read_config;
1036 if (!config_write)
1037 config_write = pci_default_write_config;
1038 pci_dev->config_read = config_read;
1039 pci_dev->config_write = config_write;
1040 bus->devices[devfn] = pci_dev;
1041 pci_dev->version_id = 2; /* Current pci device vmstate version */
1042 return pci_dev;
1043 }
1044
1045 static void pci_unregister_io_regions(PCIDevice *pci_dev)
1046 {
1047 PCIIORegion *r;
1048 int i;
1049
1050 for(i = 0; i < PCI_NUM_REGIONS; i++) {
1051 r = &pci_dev->io_regions[i];
1052 if (!r->size || r->addr == PCI_BAR_UNMAPPED)
1053 continue;
1054 memory_region_del_subregion(r->address_space, r->memory);
1055 }
1056
1057 pci_unregister_vga(pci_dev);
1058 }
1059
1060 static void pci_qdev_unrealize(DeviceState *dev, Error **errp)
1061 {
1062 PCIDevice *pci_dev = PCI_DEVICE(dev);
1063 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev);
1064
1065 pci_unregister_io_regions(pci_dev);
1066 pci_del_option_rom(pci_dev);
1067
1068 if (pc->exit) {
1069 pc->exit(pci_dev);
1070 }
1071
1072 do_pci_unregister_device(pci_dev);
1073 }
1074
1075 void pci_register_bar(PCIDevice *pci_dev, int region_num,
1076 uint8_t type, MemoryRegion *memory)
1077 {
1078 PCIIORegion *r;
1079 uint32_t addr; /* offset in pci config space */
1080 uint64_t wmask;
1081 pcibus_t size = memory_region_size(memory);
1082
1083 assert(region_num >= 0);
1084 assert(region_num < PCI_NUM_REGIONS);
1085 if (size & (size-1)) {
1086 fprintf(stderr, "ERROR: PCI region size must be pow2 "
1087 "type=0x%x, size=0x%"FMT_PCIBUS"\n", type, size);
1088 exit(1);
1089 }
1090
1091 r = &pci_dev->io_regions[region_num];
1092 r->addr = PCI_BAR_UNMAPPED;
1093 r->size = size;
1094 r->type = type;
1095 r->memory = memory;
1096 r->address_space = type & PCI_BASE_ADDRESS_SPACE_IO
1097 ? pci_dev->bus->address_space_io
1098 : pci_dev->bus->address_space_mem;
1099
1100 wmask = ~(size - 1);
1101 if (region_num == PCI_ROM_SLOT) {
1102 /* ROM enable bit is writable */
1103 wmask |= PCI_ROM_ADDRESS_ENABLE;
1104 }
1105
1106 addr = pci_bar(pci_dev, region_num);
1107 pci_set_long(pci_dev->config + addr, type);
1108
1109 if (!(r->type & PCI_BASE_ADDRESS_SPACE_IO) &&
1110 r->type & PCI_BASE_ADDRESS_MEM_TYPE_64) {
1111 pci_set_quad(pci_dev->wmask + addr, wmask);
1112 pci_set_quad(pci_dev->cmask + addr, ~0ULL);
1113 } else {
1114 pci_set_long(pci_dev->wmask + addr, wmask & 0xffffffff);
1115 pci_set_long(pci_dev->cmask + addr, 0xffffffff);
1116 }
1117 }
1118
1119 static void pci_update_vga(PCIDevice *pci_dev)
1120 {
1121 uint16_t cmd;
1122
1123 if (!pci_dev->has_vga) {
1124 return;
1125 }
1126
1127 cmd = pci_get_word(pci_dev->config + PCI_COMMAND);
1128
1129 memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_MEM],
1130 cmd & PCI_COMMAND_MEMORY);
1131 memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO],
1132 cmd & PCI_COMMAND_IO);
1133 memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI],
1134 cmd & PCI_COMMAND_IO);
1135 }
1136
1137 void pci_register_vga(PCIDevice *pci_dev, MemoryRegion *mem,
1138 MemoryRegion *io_lo, MemoryRegion *io_hi)
1139 {
1140 assert(!pci_dev->has_vga);
1141
1142 assert(memory_region_size(mem) == QEMU_PCI_VGA_MEM_SIZE);
1143 pci_dev->vga_regions[QEMU_PCI_VGA_MEM] = mem;
1144 memory_region_add_subregion_overlap(pci_dev->bus->address_space_mem,
1145 QEMU_PCI_VGA_MEM_BASE, mem, 1);
1146
1147 assert(memory_region_size(io_lo) == QEMU_PCI_VGA_IO_LO_SIZE);
1148 pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO] = io_lo;
1149 memory_region_add_subregion_overlap(pci_dev->bus->address_space_io,
1150 QEMU_PCI_VGA_IO_LO_BASE, io_lo, 1);
1151
1152 assert(memory_region_size(io_hi) == QEMU_PCI_VGA_IO_HI_SIZE);
1153 pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI] = io_hi;
1154 memory_region_add_subregion_overlap(pci_dev->bus->address_space_io,
1155 QEMU_PCI_VGA_IO_HI_BASE, io_hi, 1);
1156 pci_dev->has_vga = true;
1157
1158 pci_update_vga(pci_dev);
1159 }
1160
1161 void pci_unregister_vga(PCIDevice *pci_dev)
1162 {
1163 if (!pci_dev->has_vga) {
1164 return;
1165 }
1166
1167 memory_region_del_subregion(pci_dev->bus->address_space_mem,
1168 pci_dev->vga_regions[QEMU_PCI_VGA_MEM]);
1169 memory_region_del_subregion(pci_dev->bus->address_space_io,
1170 pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO]);
1171 memory_region_del_subregion(pci_dev->bus->address_space_io,
1172 pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI]);
1173 pci_dev->has_vga = false;
1174 }
1175
1176 pcibus_t pci_get_bar_addr(PCIDevice *pci_dev, int region_num)
1177 {
1178 return pci_dev->io_regions[region_num].addr;
1179 }
1180
1181 static pcibus_t pci_bar_address(PCIDevice *d,
1182 int reg, uint8_t type, pcibus_t size)
1183 {
1184 pcibus_t new_addr, last_addr;
1185 int bar = pci_bar(d, reg);
1186 uint16_t cmd = pci_get_word(d->config + PCI_COMMAND);
1187 Object *machine = qdev_get_machine();
1188 ObjectClass *oc = object_get_class(machine);
1189 MachineClass *mc = MACHINE_CLASS(oc);
1190 bool allow_0_address = mc->pci_allow_0_address;
1191
1192 if (type & PCI_BASE_ADDRESS_SPACE_IO) {
1193 if (!(cmd & PCI_COMMAND_IO)) {
1194 return PCI_BAR_UNMAPPED;
1195 }
1196 new_addr = pci_get_long(d->config + bar) & ~(size - 1);
1197 last_addr = new_addr + size - 1;
1198 /* Check if 32 bit BAR wraps around explicitly.
1199 * TODO: make priorities correct and remove this work around.
1200 */
1201 if (last_addr <= new_addr || last_addr >= UINT32_MAX ||
1202 (!allow_0_address && new_addr == 0)) {
1203 return PCI_BAR_UNMAPPED;
1204 }
1205 return new_addr;
1206 }
1207
1208 if (!(cmd & PCI_COMMAND_MEMORY)) {
1209 return PCI_BAR_UNMAPPED;
1210 }
1211 if (type & PCI_BASE_ADDRESS_MEM_TYPE_64) {
1212 new_addr = pci_get_quad(d->config + bar);
1213 } else {
1214 new_addr = pci_get_long(d->config + bar);
1215 }
1216 /* the ROM slot has a specific enable bit */
1217 if (reg == PCI_ROM_SLOT && !(new_addr & PCI_ROM_ADDRESS_ENABLE)) {
1218 return PCI_BAR_UNMAPPED;
1219 }
1220 new_addr &= ~(size - 1);
1221 last_addr = new_addr + size - 1;
1222 /* NOTE: we do not support wrapping */
1223 /* XXX: as we cannot support really dynamic
1224 mappings, we handle specific values as invalid
1225 mappings. */
1226 if (last_addr <= new_addr || last_addr == PCI_BAR_UNMAPPED ||
1227 (!allow_0_address && new_addr == 0)) {
1228 return PCI_BAR_UNMAPPED;
1229 }
1230
1231 /* Now pcibus_t is 64bit.
1232 * Check if 32 bit BAR wraps around explicitly.
1233 * Without this, PC ide doesn't work well.
1234 * TODO: remove this work around.
1235 */
1236 if (!(type & PCI_BASE_ADDRESS_MEM_TYPE_64) && last_addr >= UINT32_MAX) {
1237 return PCI_BAR_UNMAPPED;
1238 }
1239
1240 /*
1241 * OS is allowed to set BAR beyond its addressable
1242 * bits. For example, 32 bit OS can set 64bit bar
1243 * to >4G. Check it. TODO: we might need to support
1244 * it in the future for e.g. PAE.
1245 */
1246 if (last_addr >= HWADDR_MAX) {
1247 return PCI_BAR_UNMAPPED;
1248 }
1249
1250 return new_addr;
1251 }
1252
1253 static void pci_update_mappings(PCIDevice *d)
1254 {
1255 PCIIORegion *r;
1256 int i;
1257 pcibus_t new_addr;
1258
1259 for(i = 0; i < PCI_NUM_REGIONS; i++) {
1260 r = &d->io_regions[i];
1261
1262 /* this region isn't registered */
1263 if (!r->size)
1264 continue;
1265
1266 new_addr = pci_bar_address(d, i, r->type, r->size);
1267
1268 /* This bar isn't changed */
1269 if (new_addr == r->addr)
1270 continue;
1271
1272 /* now do the real mapping */
1273 if (r->addr != PCI_BAR_UNMAPPED) {
1274 trace_pci_update_mappings_del(d, pci_bus_num(d->bus),
1275 PCI_SLOT(d->devfn),
1276 PCI_FUNC(d->devfn),
1277 i, r->addr, r->size);
1278 memory_region_del_subregion(r->address_space, r->memory);
1279 }
1280 r->addr = new_addr;
1281 if (r->addr != PCI_BAR_UNMAPPED) {
1282 trace_pci_update_mappings_add(d, pci_bus_num(d->bus),
1283 PCI_SLOT(d->devfn),
1284 PCI_FUNC(d->devfn),
1285 i, r->addr, r->size);
1286 memory_region_add_subregion_overlap(r->address_space,
1287 r->addr, r->memory, 1);
1288 }
1289 }
1290
1291 pci_update_vga(d);
1292 }
1293
1294 static inline int pci_irq_disabled(PCIDevice *d)
1295 {
1296 return pci_get_word(d->config + PCI_COMMAND) & PCI_COMMAND_INTX_DISABLE;
1297 }
1298
1299 /* Called after interrupt disabled field update in config space,
1300 * assert/deassert interrupts if necessary.
1301 * Gets original interrupt disable bit value (before update). */
1302 static void pci_update_irq_disabled(PCIDevice *d, int was_irq_disabled)
1303 {
1304 int i, disabled = pci_irq_disabled(d);
1305 if (disabled == was_irq_disabled)
1306 return;
1307 for (i = 0; i < PCI_NUM_PINS; ++i) {
1308 int state = pci_irq_state(d, i);
1309 pci_change_irq_level(d, i, disabled ? -state : state);
1310 }
1311 }
1312
1313 uint32_t pci_default_read_config(PCIDevice *d,
1314 uint32_t address, int len)
1315 {
1316 uint32_t val = 0;
1317
1318 memcpy(&val, d->config + address, len);
1319 return le32_to_cpu(val);
1320 }
1321
1322 void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val_in, int l)
1323 {
1324 int i, was_irq_disabled = pci_irq_disabled(d);
1325 uint32_t val = val_in;
1326
1327 for (i = 0; i < l; val >>= 8, ++i) {
1328 uint8_t wmask = d->wmask[addr + i];
1329 uint8_t w1cmask = d->w1cmask[addr + i];
1330 assert(!(wmask & w1cmask));
1331 d->config[addr + i] = (d->config[addr + i] & ~wmask) | (val & wmask);
1332 d->config[addr + i] &= ~(val & w1cmask); /* W1C: Write 1 to Clear */
1333 }
1334 if (ranges_overlap(addr, l, PCI_BASE_ADDRESS_0, 24) ||
1335 ranges_overlap(addr, l, PCI_ROM_ADDRESS, 4) ||
1336 ranges_overlap(addr, l, PCI_ROM_ADDRESS1, 4) ||
1337 range_covers_byte(addr, l, PCI_COMMAND))
1338 pci_update_mappings(d);
1339
1340 if (range_covers_byte(addr, l, PCI_COMMAND)) {
1341 pci_update_irq_disabled(d, was_irq_disabled);
1342 memory_region_set_enabled(&d->bus_master_enable_region,
1343 pci_get_word(d->config + PCI_COMMAND)
1344 & PCI_COMMAND_MASTER);
1345 }
1346
1347 msi_write_config(d, addr, val_in, l);
1348 msix_write_config(d, addr, val_in, l);
1349 }
1350
1351 /***********************************************************/
1352 /* generic PCI irq support */
1353
1354 /* 0 <= irq_num <= 3. level must be 0 or 1 */
1355 static void pci_irq_handler(void *opaque, int irq_num, int level)
1356 {
1357 PCIDevice *pci_dev = opaque;
1358 int change;
1359
1360 change = level - pci_irq_state(pci_dev, irq_num);
1361 if (!change)
1362 return;
1363
1364 pci_set_irq_state(pci_dev, irq_num, level);
1365 pci_update_irq_status(pci_dev);
1366 if (pci_irq_disabled(pci_dev))
1367 return;
1368 pci_change_irq_level(pci_dev, irq_num, change);
1369 }
1370
1371 static inline int pci_intx(PCIDevice *pci_dev)
1372 {
1373 return pci_get_byte(pci_dev->config + PCI_INTERRUPT_PIN) - 1;
1374 }
1375
1376 qemu_irq pci_allocate_irq(PCIDevice *pci_dev)
1377 {
1378 int intx = pci_intx(pci_dev);
1379
1380 return qemu_allocate_irq(pci_irq_handler, pci_dev, intx);
1381 }
1382
1383 void pci_set_irq(PCIDevice *pci_dev, int level)
1384 {
1385 int intx = pci_intx(pci_dev);
1386 pci_irq_handler(pci_dev, intx, level);
1387 }
1388
1389 /* Special hooks used by device assignment */
1390 void pci_bus_set_route_irq_fn(PCIBus *bus, pci_route_irq_fn route_intx_to_irq)
1391 {
1392 assert(pci_bus_is_root(bus));
1393 bus->route_intx_to_irq = route_intx_to_irq;
1394 }
1395
1396 PCIINTxRoute pci_device_route_intx_to_irq(PCIDevice *dev, int pin)
1397 {
1398 PCIBus *bus;
1399
1400 do {
1401 bus = dev->bus;
1402 pin = bus->map_irq(dev, pin);
1403 dev = bus->parent_dev;
1404 } while (dev);
1405
1406 if (!bus->route_intx_to_irq) {
1407 error_report("PCI: Bug - unimplemented PCI INTx routing (%s)",
1408 object_get_typename(OBJECT(bus->qbus.parent)));
1409 return (PCIINTxRoute) { PCI_INTX_DISABLED, -1 };
1410 }
1411
1412 return bus->route_intx_to_irq(bus->irq_opaque, pin);
1413 }
1414
1415 bool pci_intx_route_changed(PCIINTxRoute *old, PCIINTxRoute *new)
1416 {
1417 return old->mode != new->mode || old->irq != new->irq;
1418 }
1419
1420 void pci_bus_fire_intx_routing_notifier(PCIBus *bus)
1421 {
1422 PCIDevice *dev;
1423 PCIBus *sec;
1424 int i;
1425
1426 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) {
1427 dev = bus->devices[i];
1428 if (dev && dev->intx_routing_notifier) {
1429 dev->intx_routing_notifier(dev);
1430 }
1431 }
1432
1433 QLIST_FOREACH(sec, &bus->child, sibling) {
1434 pci_bus_fire_intx_routing_notifier(sec);
1435 }
1436 }
1437
1438 void pci_device_set_intx_routing_notifier(PCIDevice *dev,
1439 PCIINTxRoutingNotifier notifier)
1440 {
1441 dev->intx_routing_notifier = notifier;
1442 }
1443
1444 /*
1445 * PCI-to-PCI bridge specification
1446 * 9.1: Interrupt routing. Table 9-1
1447 *
1448 * the PCI Express Base Specification, Revision 2.1
1449 * 2.2.8.1: INTx interrutp signaling - Rules
1450 * the Implementation Note
1451 * Table 2-20
1452 */
1453 /*
1454 * 0 <= pin <= 3 0 = INTA, 1 = INTB, 2 = INTC, 3 = INTD
1455 * 0-origin unlike PCI interrupt pin register.
1456 */
1457 int pci_swizzle_map_irq_fn(PCIDevice *pci_dev, int pin)
1458 {
1459 return (pin + PCI_SLOT(pci_dev->devfn)) % PCI_NUM_PINS;
1460 }
1461
1462 /***********************************************************/
1463 /* monitor info on PCI */
1464
1465 typedef struct {
1466 uint16_t class;
1467 const char *desc;
1468 const char *fw_name;
1469 uint16_t fw_ign_bits;
1470 } pci_class_desc;
1471
1472 static const pci_class_desc pci_class_descriptions[] =
1473 {
1474 { 0x0001, "VGA controller", "display"},
1475 { 0x0100, "SCSI controller", "scsi"},
1476 { 0x0101, "IDE controller", "ide"},
1477 { 0x0102, "Floppy controller", "fdc"},
1478 { 0x0103, "IPI controller", "ipi"},
1479 { 0x0104, "RAID controller", "raid"},
1480 { 0x0106, "SATA controller"},
1481 { 0x0107, "SAS controller"},
1482 { 0x0180, "Storage controller"},
1483 { 0x0200, "Ethernet controller", "ethernet"},
1484 { 0x0201, "Token Ring controller", "token-ring"},
1485 { 0x0202, "FDDI controller", "fddi"},
1486 { 0x0203, "ATM controller", "atm"},
1487 { 0x0280, "Network controller"},
1488 { 0x0300, "VGA controller", "display", 0x00ff},
1489 { 0x0301, "XGA controller"},
1490 { 0x0302, "3D controller"},
1491 { 0x0380, "Display controller"},
1492 { 0x0400, "Video controller", "video"},
1493 { 0x0401, "Audio controller", "sound"},
1494 { 0x0402, "Phone"},
1495 { 0x0403, "Audio controller", "sound"},
1496 { 0x0480, "Multimedia controller"},
1497 { 0x0500, "RAM controller", "memory"},
1498 { 0x0501, "Flash controller", "flash"},
1499 { 0x0580, "Memory controller"},
1500 { 0x0600, "Host bridge", "host"},
1501 { 0x0601, "ISA bridge", "isa"},
1502 { 0x0602, "EISA bridge", "eisa"},
1503 { 0x0603, "MC bridge", "mca"},
1504 { 0x0604, "PCI bridge", "pci-bridge"},
1505 { 0x0605, "PCMCIA bridge", "pcmcia"},
1506 { 0x0606, "NUBUS bridge", "nubus"},
1507 { 0x0607, "CARDBUS bridge", "cardbus"},
1508 { 0x0608, "RACEWAY bridge"},
1509 { 0x0680, "Bridge"},
1510 { 0x0700, "Serial port", "serial"},
1511 { 0x0701, "Parallel port", "parallel"},
1512 { 0x0800, "Interrupt controller", "interrupt-controller"},
1513 { 0x0801, "DMA controller", "dma-controller"},
1514 { 0x0802, "Timer", "timer"},
1515 { 0x0803, "RTC", "rtc"},
1516 { 0x0900, "Keyboard", "keyboard"},
1517 { 0x0901, "Pen", "pen"},
1518 { 0x0902, "Mouse", "mouse"},
1519 { 0x0A00, "Dock station", "dock", 0x00ff},
1520 { 0x0B00, "i386 cpu", "cpu", 0x00ff},
1521 { 0x0c00, "Fireware contorller", "fireware"},
1522 { 0x0c01, "Access bus controller", "access-bus"},
1523 { 0x0c02, "SSA controller", "ssa"},
1524 { 0x0c03, "USB controller", "usb"},
1525 { 0x0c04, "Fibre channel controller", "fibre-channel"},
1526 { 0x0c05, "SMBus"},
1527 { 0, NULL}
1528 };
1529
1530 static void pci_for_each_device_under_bus(PCIBus *bus,
1531 void (*fn)(PCIBus *b, PCIDevice *d,
1532 void *opaque),
1533 void *opaque)
1534 {
1535 PCIDevice *d;
1536 int devfn;
1537
1538 for(devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) {
1539 d = bus->devices[devfn];
1540 if (d) {
1541 fn(bus, d, opaque);
1542 }
1543 }
1544 }
1545
1546 void pci_for_each_device(PCIBus *bus, int bus_num,
1547 void (*fn)(PCIBus *b, PCIDevice *d, void *opaque),
1548 void *opaque)
1549 {
1550 bus = pci_find_bus_nr(bus, bus_num);
1551
1552 if (bus) {
1553 pci_for_each_device_under_bus(bus, fn, opaque);
1554 }
1555 }
1556
1557 static const pci_class_desc *get_class_desc(int class)
1558 {
1559 const pci_class_desc *desc;
1560
1561 desc = pci_class_descriptions;
1562 while (desc->desc && class != desc->class) {
1563 desc++;
1564 }
1565
1566 return desc;
1567 }
1568
1569 static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num);
1570
1571 static PciMemoryRegionList *qmp_query_pci_regions(const PCIDevice *dev)
1572 {
1573 PciMemoryRegionList *head = NULL, *cur_item = NULL;
1574 int i;
1575
1576 for (i = 0; i < PCI_NUM_REGIONS; i++) {
1577 const PCIIORegion *r = &dev->io_regions[i];
1578 PciMemoryRegionList *region;
1579
1580 if (!r->size) {
1581 continue;
1582 }
1583
1584 region = g_malloc0(sizeof(*region));
1585 region->value = g_malloc0(sizeof(*region->value));
1586
1587 if (r->type & PCI_BASE_ADDRESS_SPACE_IO) {
1588 region->value->type = g_strdup("io");
1589 } else {
1590 region->value->type = g_strdup("memory");
1591 region->value->has_prefetch = true;
1592 region->value->prefetch = !!(r->type & PCI_BASE_ADDRESS_MEM_PREFETCH);
1593 region->value->has_mem_type_64 = true;
1594 region->value->mem_type_64 = !!(r->type & PCI_BASE_ADDRESS_MEM_TYPE_64);
1595 }
1596
1597 region->value->bar = i;
1598 region->value->address = r->addr;
1599 region->value->size = r->size;
1600
1601 /* XXX: waiting for the qapi to support GSList */
1602 if (!cur_item) {
1603 head = cur_item = region;
1604 } else {
1605 cur_item->next = region;
1606 cur_item = region;
1607 }
1608 }
1609
1610 return head;
1611 }
1612
1613 static PciBridgeInfo *qmp_query_pci_bridge(PCIDevice *dev, PCIBus *bus,
1614 int bus_num)
1615 {
1616 PciBridgeInfo *info;
1617 PciMemoryRange *range;
1618
1619 info = g_new0(PciBridgeInfo, 1);
1620
1621 info->bus = g_new0(PciBusInfo, 1);
1622 info->bus->number = dev->config[PCI_PRIMARY_BUS];
1623 info->bus->secondary = dev->config[PCI_SECONDARY_BUS];
1624 info->bus->subordinate = dev->config[PCI_SUBORDINATE_BUS];
1625
1626 range = info->bus->io_range = g_new0(PciMemoryRange, 1);
1627 range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_IO);
1628 range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_IO);
1629
1630 range = info->bus->memory_range = g_new0(PciMemoryRange, 1);
1631 range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_MEMORY);
1632 range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_MEMORY);
1633
1634 range = info->bus->prefetchable_range = g_new0(PciMemoryRange, 1);
1635 range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
1636 range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
1637
1638 if (dev->config[PCI_SECONDARY_BUS] != 0) {
1639 PCIBus *child_bus = pci_find_bus_nr(bus, dev->config[PCI_SECONDARY_BUS]);
1640 if (child_bus) {
1641 info->has_devices = true;
1642 info->devices = qmp_query_pci_devices(child_bus, dev->config[PCI_SECONDARY_BUS]);
1643 }
1644 }
1645
1646 return info;
1647 }
1648
1649 static PciDeviceInfo *qmp_query_pci_device(PCIDevice *dev, PCIBus *bus,
1650 int bus_num)
1651 {
1652 const pci_class_desc *desc;
1653 PciDeviceInfo *info;
1654 uint8_t type;
1655 int class;
1656
1657 info = g_new0(PciDeviceInfo, 1);
1658 info->bus = bus_num;
1659 info->slot = PCI_SLOT(dev->devfn);
1660 info->function = PCI_FUNC(dev->devfn);
1661
1662 info->class_info = g_new0(PciDeviceClass, 1);
1663 class = pci_get_word(dev->config + PCI_CLASS_DEVICE);
1664 info->class_info->q_class = class;
1665 desc = get_class_desc(class);
1666 if (desc->desc) {
1667 info->class_info->has_desc = true;
1668 info->class_info->desc = g_strdup(desc->desc);
1669 }
1670
1671 info->id = g_new0(PciDeviceId, 1);
1672 info->id->vendor = pci_get_word(dev->config + PCI_VENDOR_ID);
1673 info->id->device = pci_get_word(dev->config + PCI_DEVICE_ID);
1674 info->regions = qmp_query_pci_regions(dev);
1675 info->qdev_id = g_strdup(dev->qdev.id ? dev->qdev.id : "");
1676
1677 if (dev->config[PCI_INTERRUPT_PIN] != 0) {
1678 info->has_irq = true;
1679 info->irq = dev->config[PCI_INTERRUPT_LINE];
1680 }
1681
1682 type = dev->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION;
1683 if (type == PCI_HEADER_TYPE_BRIDGE) {
1684 info->has_pci_bridge = true;
1685 info->pci_bridge = qmp_query_pci_bridge(dev, bus, bus_num);
1686 }
1687
1688 return info;
1689 }
1690
1691 static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num)
1692 {
1693 PciDeviceInfoList *info, *head = NULL, *cur_item = NULL;
1694 PCIDevice *dev;
1695 int devfn;
1696
1697 for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) {
1698 dev = bus->devices[devfn];
1699 if (dev) {
1700 info = g_malloc0(sizeof(*info));
1701 info->value = qmp_query_pci_device(dev, bus, bus_num);
1702
1703 /* XXX: waiting for the qapi to support GSList */
1704 if (!cur_item) {
1705 head = cur_item = info;
1706 } else {
1707 cur_item->next = info;
1708 cur_item = info;
1709 }
1710 }
1711 }
1712
1713 return head;
1714 }
1715
1716 static PciInfo *qmp_query_pci_bus(PCIBus *bus, int bus_num)
1717 {
1718 PciInfo *info = NULL;
1719
1720 bus = pci_find_bus_nr(bus, bus_num);
1721 if (bus) {
1722 info = g_malloc0(sizeof(*info));
1723 info->bus = bus_num;
1724 info->devices = qmp_query_pci_devices(bus, bus_num);
1725 }
1726
1727 return info;
1728 }
1729
1730 PciInfoList *qmp_query_pci(Error **errp)
1731 {
1732 PciInfoList *info, *head = NULL, *cur_item = NULL;
1733 PCIHostState *host_bridge;
1734
1735 QLIST_FOREACH(host_bridge, &pci_host_bridges, next) {
1736 info = g_malloc0(sizeof(*info));
1737 info->value = qmp_query_pci_bus(host_bridge->bus,
1738 pci_bus_num(host_bridge->bus));
1739
1740 /* XXX: waiting for the qapi to support GSList */
1741 if (!cur_item) {
1742 head = cur_item = info;
1743 } else {
1744 cur_item->next = info;
1745 cur_item = info;
1746 }
1747 }
1748
1749 return head;
1750 }
1751
1752 static const char * const pci_nic_models[] = {
1753 "ne2k_pci",
1754 "i82551",
1755 "i82557b",
1756 "i82559er",
1757 "rtl8139",
1758 "e1000",
1759 "pcnet",
1760 "virtio",
1761 NULL
1762 };
1763
1764 static const char * const pci_nic_names[] = {
1765 "ne2k_pci",
1766 "i82551",
1767 "i82557b",
1768 "i82559er",
1769 "rtl8139",
1770 "e1000",
1771 "pcnet",
1772 "virtio-net-pci",
1773 NULL
1774 };
1775
1776 /* Initialize a PCI NIC. */
1777 PCIDevice *pci_nic_init_nofail(NICInfo *nd, PCIBus *rootbus,
1778 const char *default_model,
1779 const char *default_devaddr)
1780 {
1781 const char *devaddr = nd->devaddr ? nd->devaddr : default_devaddr;
1782 PCIBus *bus;
1783 PCIDevice *pci_dev;
1784 DeviceState *dev;
1785 int devfn;
1786 int i;
1787
1788 if (qemu_show_nic_models(nd->model, pci_nic_models)) {
1789 exit(0);
1790 }
1791
1792 i = qemu_find_nic_model(nd, pci_nic_models, default_model);
1793 if (i < 0) {
1794 exit(1);
1795 }
1796
1797 bus = pci_get_bus_devfn(&devfn, rootbus, devaddr);
1798 if (!bus) {
1799 error_report("Invalid PCI device address %s for device %s",
1800 devaddr, pci_nic_names[i]);
1801 exit(1);
1802 }
1803
1804 pci_dev = pci_create(bus, devfn, pci_nic_names[i]);
1805 dev = &pci_dev->qdev;
1806 qdev_set_nic_properties(dev, nd);
1807 qdev_init_nofail(dev);
1808
1809 return pci_dev;
1810 }
1811
1812 PCIDevice *pci_vga_init(PCIBus *bus)
1813 {
1814 switch (vga_interface_type) {
1815 case VGA_CIRRUS:
1816 return pci_create_simple(bus, -1, "cirrus-vga");
1817 case VGA_QXL:
1818 return pci_create_simple(bus, -1, "qxl-vga");
1819 case VGA_STD:
1820 return pci_create_simple(bus, -1, "VGA");
1821 case VGA_VMWARE:
1822 return pci_create_simple(bus, -1, "vmware-svga");
1823 case VGA_VIRTIO:
1824 return pci_create_simple(bus, -1, "virtio-vga");
1825 case VGA_NONE:
1826 default: /* Other non-PCI types. Checking for unsupported types is already
1827 done in vl.c. */
1828 return NULL;
1829 }
1830 }
1831
1832 /* Whether a given bus number is in range of the secondary
1833 * bus of the given bridge device. */
1834 static bool pci_secondary_bus_in_range(PCIDevice *dev, int bus_num)
1835 {
1836 return !(pci_get_word(dev->config + PCI_BRIDGE_CONTROL) &
1837 PCI_BRIDGE_CTL_BUS_RESET) /* Don't walk the bus if it's reset. */ &&
1838 dev->config[PCI_SECONDARY_BUS] <= bus_num &&
1839 bus_num <= dev->config[PCI_SUBORDINATE_BUS];
1840 }
1841
1842 /* Whether a given bus number is in a range of a root bus */
1843 static bool pci_root_bus_in_range(PCIBus *bus, int bus_num)
1844 {
1845 int i;
1846
1847 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) {
1848 PCIDevice *dev = bus->devices[i];
1849
1850 if (dev && PCI_DEVICE_GET_CLASS(dev)->is_bridge) {
1851 if (pci_secondary_bus_in_range(dev, bus_num)) {
1852 return true;
1853 }
1854 }
1855 }
1856
1857 return false;
1858 }
1859
1860 static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num)
1861 {
1862 PCIBus *sec;
1863
1864 if (!bus) {
1865 return NULL;
1866 }
1867
1868 if (pci_bus_num(bus) == bus_num) {
1869 return bus;
1870 }
1871
1872 /* Consider all bus numbers in range for the host pci bridge. */
1873 if (!pci_bus_is_root(bus) &&
1874 !pci_secondary_bus_in_range(bus->parent_dev, bus_num)) {
1875 return NULL;
1876 }
1877
1878 /* try child bus */
1879 for (; bus; bus = sec) {
1880 QLIST_FOREACH(sec, &bus->child, sibling) {
1881 if (pci_bus_num(sec) == bus_num) {
1882 return sec;
1883 }
1884 /* PXB buses assumed to be children of bus 0 */
1885 if (pci_bus_is_root(sec)) {
1886 if (pci_root_bus_in_range(sec, bus_num)) {
1887 break;
1888 }
1889 } else {
1890 if (pci_secondary_bus_in_range(sec->parent_dev, bus_num)) {
1891 break;
1892 }
1893 }
1894 }
1895 }
1896
1897 return NULL;
1898 }
1899
1900 void pci_for_each_bus_depth_first(PCIBus *bus,
1901 void *(*begin)(PCIBus *bus, void *parent_state),
1902 void (*end)(PCIBus *bus, void *state),
1903 void *parent_state)
1904 {
1905 PCIBus *sec;
1906 void *state;
1907
1908 if (!bus) {
1909 return;
1910 }
1911
1912 if (begin) {
1913 state = begin(bus, parent_state);
1914 } else {
1915 state = parent_state;
1916 }
1917
1918 QLIST_FOREACH(sec, &bus->child, sibling) {
1919 pci_for_each_bus_depth_first(sec, begin, end, state);
1920 }
1921
1922 if (end) {
1923 end(bus, state);
1924 }
1925 }
1926
1927
1928 PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn)
1929 {
1930 bus = pci_find_bus_nr(bus, bus_num);
1931
1932 if (!bus)
1933 return NULL;
1934
1935 return bus->devices[devfn];
1936 }
1937
1938 static void pci_qdev_realize(DeviceState *qdev, Error **errp)
1939 {
1940 PCIDevice *pci_dev = (PCIDevice *)qdev;
1941 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev);
1942 Error *local_err = NULL;
1943 PCIBus *bus;
1944 bool is_default_rom;
1945
1946 /* initialize cap_present for pci_is_express() and pci_config_size() */
1947 if (pc->is_express) {
1948 pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS;
1949 }
1950
1951 bus = PCI_BUS(qdev_get_parent_bus(qdev));
1952 pci_dev = do_pci_register_device(pci_dev, bus,
1953 object_get_typename(OBJECT(qdev)),
1954 pci_dev->devfn, errp);
1955 if (pci_dev == NULL)
1956 return;
1957
1958 if (pc->realize) {
1959 pc->realize(pci_dev, &local_err);
1960 if (local_err) {
1961 error_propagate(errp, local_err);
1962 do_pci_unregister_device(pci_dev);
1963 return;
1964 }
1965 }
1966
1967 /* rom loading */
1968 is_default_rom = false;
1969 if (pci_dev->romfile == NULL && pc->romfile != NULL) {
1970 pci_dev->romfile = g_strdup(pc->romfile);
1971 is_default_rom = true;
1972 }
1973
1974 pci_add_option_rom(pci_dev, is_default_rom, &local_err);
1975 if (local_err) {
1976 error_propagate(errp, local_err);
1977 pci_qdev_unrealize(DEVICE(pci_dev), NULL);
1978 return;
1979 }
1980 }
1981
1982 static void pci_default_realize(PCIDevice *dev, Error **errp)
1983 {
1984 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev);
1985
1986 if (pc->init) {
1987 if (pc->init(dev) < 0) {
1988 error_setg(errp, "Device initialization failed");
1989 return;
1990 }
1991 }
1992 }
1993
1994 PCIDevice *pci_create_multifunction(PCIBus *bus, int devfn, bool multifunction,
1995 const char *name)
1996 {
1997 DeviceState *dev;
1998
1999 dev = qdev_create(&bus->qbus, name);
2000 qdev_prop_set_int32(dev, "addr", devfn);
2001 qdev_prop_set_bit(dev, "multifunction", multifunction);
2002 return PCI_DEVICE(dev);
2003 }
2004
2005 PCIDevice *pci_create_simple_multifunction(PCIBus *bus, int devfn,
2006 bool multifunction,
2007 const char *name)
2008 {
2009 PCIDevice *dev = pci_create_multifunction(bus, devfn, multifunction, name);
2010 qdev_init_nofail(&dev->qdev);
2011 return dev;
2012 }
2013
2014 PCIDevice *pci_create(PCIBus *bus, int devfn, const char *name)
2015 {
2016 return pci_create_multifunction(bus, devfn, false, name);
2017 }
2018
2019 PCIDevice *pci_create_simple(PCIBus *bus, int devfn, const char *name)
2020 {
2021 return pci_create_simple_multifunction(bus, devfn, false, name);
2022 }
2023
2024 static uint8_t pci_find_space(PCIDevice *pdev, uint8_t size)
2025 {
2026 int offset = PCI_CONFIG_HEADER_SIZE;
2027 int i;
2028 for (i = PCI_CONFIG_HEADER_SIZE; i < PCI_CONFIG_SPACE_SIZE; ++i) {
2029 if (pdev->used[i])
2030 offset = i + 1;
2031 else if (i - offset + 1 == size)
2032 return offset;
2033 }
2034 return 0;
2035 }
2036
2037 static uint8_t pci_find_capability_list(PCIDevice *pdev, uint8_t cap_id,
2038 uint8_t *prev_p)
2039 {
2040 uint8_t next, prev;
2041
2042 if (!(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST))
2043 return 0;
2044
2045 for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]);
2046 prev = next + PCI_CAP_LIST_NEXT)
2047 if (pdev->config[next + PCI_CAP_LIST_ID] == cap_id)
2048 break;
2049
2050 if (prev_p)
2051 *prev_p = prev;
2052 return next;
2053 }
2054
2055 static uint8_t pci_find_capability_at_offset(PCIDevice *pdev, uint8_t offset)
2056 {
2057 uint8_t next, prev, found = 0;
2058
2059 if (!(pdev->used[offset])) {
2060 return 0;
2061 }
2062
2063 assert(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST);
2064
2065 for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]);
2066 prev = next + PCI_CAP_LIST_NEXT) {
2067 if (next <= offset && next > found) {
2068 found = next;
2069 }
2070 }
2071 return found;
2072 }
2073
2074 /* Patch the PCI vendor and device ids in a PCI rom image if necessary.
2075 This is needed for an option rom which is used for more than one device. */
2076 static void pci_patch_ids(PCIDevice *pdev, uint8_t *ptr, int size)
2077 {
2078 uint16_t vendor_id;
2079 uint16_t device_id;
2080 uint16_t rom_vendor_id;
2081 uint16_t rom_device_id;
2082 uint16_t rom_magic;
2083 uint16_t pcir_offset;
2084 uint8_t checksum;
2085
2086 /* Words in rom data are little endian (like in PCI configuration),
2087 so they can be read / written with pci_get_word / pci_set_word. */
2088
2089 /* Only a valid rom will be patched. */
2090 rom_magic = pci_get_word(ptr);
2091 if (rom_magic != 0xaa55) {
2092 PCI_DPRINTF("Bad ROM magic %04x\n", rom_magic);
2093 return;
2094 }
2095 pcir_offset = pci_get_word(ptr + 0x18);
2096 if (pcir_offset + 8 >= size || memcmp(ptr + pcir_offset, "PCIR", 4)) {
2097 PCI_DPRINTF("Bad PCIR offset 0x%x or signature\n", pcir_offset);
2098 return;
2099 }
2100
2101 vendor_id = pci_get_word(pdev->config + PCI_VENDOR_ID);
2102 device_id = pci_get_word(pdev->config + PCI_DEVICE_ID);
2103 rom_vendor_id = pci_get_word(ptr + pcir_offset + 4);
2104 rom_device_id = pci_get_word(ptr + pcir_offset + 6);
2105
2106 PCI_DPRINTF("%s: ROM id %04x%04x / PCI id %04x%04x\n", pdev->romfile,
2107 vendor_id, device_id, rom_vendor_id, rom_device_id);
2108
2109 checksum = ptr[6];
2110
2111 if (vendor_id != rom_vendor_id) {
2112 /* Patch vendor id and checksum (at offset 6 for etherboot roms). */
2113 checksum += (uint8_t)rom_vendor_id + (uint8_t)(rom_vendor_id >> 8);
2114 checksum -= (uint8_t)vendor_id + (uint8_t)(vendor_id >> 8);
2115 PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum);
2116 ptr[6] = checksum;
2117 pci_set_word(ptr + pcir_offset + 4, vendor_id);
2118 }
2119
2120 if (device_id != rom_device_id) {
2121 /* Patch device id and checksum (at offset 6 for etherboot roms). */
2122 checksum += (uint8_t)rom_device_id + (uint8_t)(rom_device_id >> 8);
2123 checksum -= (uint8_t)device_id + (uint8_t)(device_id >> 8);
2124 PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum);
2125 ptr[6] = checksum;
2126 pci_set_word(ptr + pcir_offset + 6, device_id);
2127 }
2128 }
2129
2130 /* Add an option rom for the device */
2131 static void pci_add_option_rom(PCIDevice *pdev, bool is_default_rom,
2132 Error **errp)
2133 {
2134 int size;
2135 char *path;
2136 void *ptr;
2137 char name[32];
2138 const VMStateDescription *vmsd;
2139
2140 if (!pdev->romfile)
2141 return;
2142 if (strlen(pdev->romfile) == 0)
2143 return;
2144
2145 if (!pdev->rom_bar) {
2146 /*
2147 * Load rom via fw_cfg instead of creating a rom bar,
2148 * for 0.11 compatibility.
2149 */
2150 int class = pci_get_word(pdev->config + PCI_CLASS_DEVICE);
2151
2152 /*
2153 * Hot-plugged devices can't use the option ROM
2154 * if the rom bar is disabled.
2155 */
2156 if (DEVICE(pdev)->hotplugged) {
2157 error_setg(errp, "Hot-plugged device without ROM bar"
2158 " can't have an option ROM");
2159 return;
2160 }
2161
2162 if (class == 0x0300) {
2163 rom_add_vga(pdev->romfile);
2164 } else {
2165 rom_add_option(pdev->romfile, -1);
2166 }
2167 return;
2168 }
2169
2170 path = qemu_find_file(QEMU_FILE_TYPE_BIOS, pdev->romfile);
2171 if (path == NULL) {
2172 path = g_strdup(pdev->romfile);
2173 }
2174
2175 size = get_image_size(path);
2176 if (size < 0) {
2177 error_setg(errp, "failed to find romfile \"%s\"", pdev->romfile);
2178 g_free(path);
2179 return;
2180 } else if (size == 0) {
2181 error_setg(errp, "romfile \"%s\" is empty", pdev->romfile);
2182 g_free(path);
2183 return;
2184 }
2185 size = pow2ceil(size);
2186
2187 vmsd = qdev_get_vmsd(DEVICE(pdev));
2188
2189 if (vmsd) {
2190 snprintf(name, sizeof(name), "%s.rom", vmsd->name);
2191 } else {
2192 snprintf(name, sizeof(name), "%s.rom", object_get_typename(OBJECT(pdev)));
2193 }
2194 pdev->has_rom = true;
2195 memory_region_init_ram(&pdev->rom, OBJECT(pdev), name, size, &error_fatal);
2196 vmstate_register_ram(&pdev->rom, &pdev->qdev);
2197 ptr = memory_region_get_ram_ptr(&pdev->rom);
2198 load_image(path, ptr);
2199 g_free(path);
2200
2201 if (is_default_rom) {
2202 /* Only the default rom images will be patched (if needed). */
2203 pci_patch_ids(pdev, ptr, size);
2204 }
2205
2206 pci_register_bar(pdev, PCI_ROM_SLOT, 0, &pdev->rom);
2207 }
2208
2209 static void pci_del_option_rom(PCIDevice *pdev)
2210 {
2211 if (!pdev->has_rom)
2212 return;
2213
2214 vmstate_unregister_ram(&pdev->rom, &pdev->qdev);
2215 pdev->has_rom = false;
2216 }
2217
2218 /*
2219 * if offset = 0,
2220 * Find and reserve space and add capability to the linked list
2221 * in pci config space
2222 */
2223 int pci_add_capability(PCIDevice *pdev, uint8_t cap_id,
2224 uint8_t offset, uint8_t size)
2225 {
2226 int ret;
2227 Error *local_err = NULL;
2228
2229 ret = pci_add_capability2(pdev, cap_id, offset, size, &local_err);
2230 if (local_err) {
2231 assert(ret < 0);
2232 error_report_err(local_err);
2233 } else {
2234 /* success implies a positive offset in config space */
2235 assert(ret > 0);
2236 }
2237 return ret;
2238 }
2239
2240 int pci_add_capability2(PCIDevice *pdev, uint8_t cap_id,
2241 uint8_t offset, uint8_t size,
2242 Error **errp)
2243 {
2244 uint8_t *config;
2245 int i, overlapping_cap;
2246
2247 if (!offset) {
2248 offset = pci_find_space(pdev, size);
2249 /* out of PCI config space is programming error */
2250 assert(offset);
2251 } else {
2252 /* Verify that capabilities don't overlap. Note: device assignment
2253 * depends on this check to verify that the device is not broken.
2254 * Should never trigger for emulated devices, but it's helpful
2255 * for debugging these. */
2256 for (i = offset; i < offset + size; i++) {
2257 overlapping_cap = pci_find_capability_at_offset(pdev, i);
2258 if (overlapping_cap) {
2259 error_setg(errp, "%s:%02x:%02x.%x "
2260 "Attempt to add PCI capability %x at offset "
2261 "%x overlaps existing capability %x at offset %x",
2262 pci_root_bus_path(pdev), pci_bus_num(pdev->bus),
2263 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn),
2264 cap_id, offset, overlapping_cap, i);
2265 return -EINVAL;
2266 }
2267 }
2268 }
2269
2270 config = pdev->config + offset;
2271 config[PCI_CAP_LIST_ID] = cap_id;
2272 config[PCI_CAP_LIST_NEXT] = pdev->config[PCI_CAPABILITY_LIST];
2273 pdev->config[PCI_CAPABILITY_LIST] = offset;
2274 pdev->config[PCI_STATUS] |= PCI_STATUS_CAP_LIST;
2275 memset(pdev->used + offset, 0xFF, QEMU_ALIGN_UP(size, 4));
2276 /* Make capability read-only by default */
2277 memset(pdev->wmask + offset, 0, size);
2278 /* Check capability by default */
2279 memset(pdev->cmask + offset, 0xFF, size);
2280 return offset;
2281 }
2282
2283 /* Unlink capability from the pci config space. */
2284 void pci_del_capability(PCIDevice *pdev, uint8_t cap_id, uint8_t size)
2285 {
2286 uint8_t prev, offset = pci_find_capability_list(pdev, cap_id, &prev);
2287 if (!offset)
2288 return;
2289 pdev->config[prev] = pdev->config[offset + PCI_CAP_LIST_NEXT];
2290 /* Make capability writable again */
2291 memset(pdev->wmask + offset, 0xff, size);
2292 memset(pdev->w1cmask + offset, 0, size);
2293 /* Clear cmask as device-specific registers can't be checked */
2294 memset(pdev->cmask + offset, 0, size);
2295 memset(pdev->used + offset, 0, QEMU_ALIGN_UP(size, 4));
2296
2297 if (!pdev->config[PCI_CAPABILITY_LIST])
2298 pdev->config[PCI_STATUS] &= ~PCI_STATUS_CAP_LIST;
2299 }
2300
2301 uint8_t pci_find_capability(PCIDevice *pdev, uint8_t cap_id)
2302 {
2303 return pci_find_capability_list(pdev, cap_id, NULL);
2304 }
2305
2306 static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent)
2307 {
2308 PCIDevice *d = (PCIDevice *)dev;
2309 const pci_class_desc *desc;
2310 char ctxt[64];
2311 PCIIORegion *r;
2312 int i, class;
2313
2314 class = pci_get_word(d->config + PCI_CLASS_DEVICE);
2315 desc = pci_class_descriptions;
2316 while (desc->desc && class != desc->class)
2317 desc++;
2318 if (desc->desc) {
2319 snprintf(ctxt, sizeof(ctxt), "%s", desc->desc);
2320 } else {
2321 snprintf(ctxt, sizeof(ctxt), "Class %04x", class);
2322 }
2323
2324 monitor_printf(mon, "%*sclass %s, addr %02x:%02x.%x, "
2325 "pci id %04x:%04x (sub %04x:%04x)\n",
2326 indent, "", ctxt, pci_bus_num(d->bus),
2327 PCI_SLOT(d->devfn), PCI_FUNC(d->devfn),
2328 pci_get_word(d->config + PCI_VENDOR_ID),
2329 pci_get_word(d->config + PCI_DEVICE_ID),
2330 pci_get_word(d->config + PCI_SUBSYSTEM_VENDOR_ID),
2331 pci_get_word(d->config + PCI_SUBSYSTEM_ID));
2332 for (i = 0; i < PCI_NUM_REGIONS; i++) {
2333 r = &d->io_regions[i];
2334 if (!r->size)
2335 continue;
2336 monitor_printf(mon, "%*sbar %d: %s at 0x%"FMT_PCIBUS
2337 " [0x%"FMT_PCIBUS"]\n",
2338 indent, "",
2339 i, r->type & PCI_BASE_ADDRESS_SPACE_IO ? "i/o" : "mem",
2340 r->addr, r->addr + r->size - 1);
2341 }
2342 }
2343
2344 static char *pci_dev_fw_name(DeviceState *dev, char *buf, int len)
2345 {
2346 PCIDevice *d = (PCIDevice *)dev;
2347 const char *name = NULL;
2348 const pci_class_desc *desc = pci_class_descriptions;
2349 int class = pci_get_word(d->config + PCI_CLASS_DEVICE);
2350
2351 while (desc->desc &&
2352 (class & ~desc->fw_ign_bits) !=
2353 (desc->class & ~desc->fw_ign_bits)) {
2354 desc++;
2355 }
2356
2357 if (desc->desc) {
2358 name = desc->fw_name;
2359 }
2360
2361 if (name) {
2362 pstrcpy(buf, len, name);
2363 } else {
2364 snprintf(buf, len, "pci%04x,%04x",
2365 pci_get_word(d->config + PCI_VENDOR_ID),
2366 pci_get_word(d->config + PCI_DEVICE_ID));
2367 }
2368
2369 return buf;
2370 }
2371
2372 static char *pcibus_get_fw_dev_path(DeviceState *dev)
2373 {
2374 PCIDevice *d = (PCIDevice *)dev;
2375 char path[50], name[33];
2376 int off;
2377
2378 off = snprintf(path, sizeof(path), "%s@%x",
2379 pci_dev_fw_name(dev, name, sizeof name),
2380 PCI_SLOT(d->devfn));
2381 if (PCI_FUNC(d->devfn))
2382 snprintf(path + off, sizeof(path) + off, ",%x", PCI_FUNC(d->devfn));
2383 return g_strdup(path);
2384 }
2385
2386 static char *pcibus_get_dev_path(DeviceState *dev)
2387 {
2388 PCIDevice *d = container_of(dev, PCIDevice, qdev);
2389 PCIDevice *t;
2390 int slot_depth;
2391 /* Path format: Domain:00:Slot.Function:Slot.Function....:Slot.Function.
2392 * 00 is added here to make this format compatible with
2393 * domain:Bus:Slot.Func for systems without nested PCI bridges.
2394 * Slot.Function list specifies the slot and function numbers for all
2395 * devices on the path from root to the specific device. */
2396 const char *root_bus_path;
2397 int root_bus_len;
2398 char slot[] = ":SS.F";
2399 int slot_len = sizeof slot - 1 /* For '\0' */;
2400 int path_len;
2401 char *path, *p;
2402 int s;
2403
2404 root_bus_path = pci_root_bus_path(d);
2405 root_bus_len = strlen(root_bus_path);
2406
2407 /* Calculate # of slots on path between device and root. */;
2408 slot_depth = 0;
2409 for (t = d; t; t = t->bus->parent_dev) {
2410 ++slot_depth;
2411 }
2412
2413 path_len = root_bus_len + slot_len * slot_depth;
2414
2415 /* Allocate memory, fill in the terminating null byte. */
2416 path = g_malloc(path_len + 1 /* For '\0' */);
2417 path[path_len] = '\0';
2418
2419 memcpy(path, root_bus_path, root_bus_len);
2420
2421 /* Fill in slot numbers. We walk up from device to root, so need to print
2422 * them in the reverse order, last to first. */
2423 p = path + path_len;
2424 for (t = d; t; t = t->bus->parent_dev) {
2425 p -= slot_len;
2426 s = snprintf(slot, sizeof slot, ":%02x.%x",
2427 PCI_SLOT(t->devfn), PCI_FUNC(t->devfn));
2428 assert(s == slot_len);
2429 memcpy(p, slot, slot_len);
2430 }
2431
2432 return path;
2433 }
2434
2435 static int pci_qdev_find_recursive(PCIBus *bus,
2436 const char *id, PCIDevice **pdev)
2437 {
2438 DeviceState *qdev = qdev_find_recursive(&bus->qbus, id);
2439 if (!qdev) {
2440 return -ENODEV;
2441 }
2442
2443 /* roughly check if given qdev is pci device */
2444 if (object_dynamic_cast(OBJECT(qdev), TYPE_PCI_DEVICE)) {
2445 *pdev = PCI_DEVICE(qdev);
2446 return 0;
2447 }
2448 return -EINVAL;
2449 }
2450
2451 int pci_qdev_find_device(const char *id, PCIDevice **pdev)
2452 {
2453 PCIHostState *host_bridge;
2454 int rc = -ENODEV;
2455
2456 QLIST_FOREACH(host_bridge, &pci_host_bridges, next) {
2457 int tmp = pci_qdev_find_recursive(host_bridge->bus, id, pdev);
2458 if (!tmp) {
2459 rc = 0;
2460 break;
2461 }
2462 if (tmp != -ENODEV) {
2463 rc = tmp;
2464 }
2465 }
2466
2467 return rc;
2468 }
2469
2470 MemoryRegion *pci_address_space(PCIDevice *dev)
2471 {
2472 return dev->bus->address_space_mem;
2473 }
2474
2475 MemoryRegion *pci_address_space_io(PCIDevice *dev)
2476 {
2477 return dev->bus->address_space_io;
2478 }
2479
2480 static void pci_device_class_init(ObjectClass *klass, void *data)
2481 {
2482 DeviceClass *k = DEVICE_CLASS(klass);
2483 PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
2484
2485 k->realize = pci_qdev_realize;
2486 k->unrealize = pci_qdev_unrealize;
2487 k->bus_type = TYPE_PCI_BUS;
2488 k->props = pci_props;
2489 pc->realize = pci_default_realize;
2490 }
2491
2492 AddressSpace *pci_device_iommu_address_space(PCIDevice *dev)
2493 {
2494 PCIBus *bus = PCI_BUS(dev->bus);
2495 PCIBus *iommu_bus = bus;
2496
2497 while(iommu_bus && !iommu_bus->iommu_fn && iommu_bus->parent_dev) {
2498 iommu_bus = PCI_BUS(iommu_bus->parent_dev->bus);
2499 }
2500 if (iommu_bus && iommu_bus->iommu_fn) {
2501 return iommu_bus->iommu_fn(bus, iommu_bus->iommu_opaque, dev->devfn);
2502 }
2503 return &address_space_memory;
2504 }
2505
2506 void pci_setup_iommu(PCIBus *bus, PCIIOMMUFunc fn, void *opaque)
2507 {
2508 bus->iommu_fn = fn;
2509 bus->iommu_opaque = opaque;
2510 }
2511
2512 static void pci_dev_get_w64(PCIBus *b, PCIDevice *dev, void *opaque)
2513 {
2514 Range *range = opaque;
2515 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev);
2516 uint16_t cmd = pci_get_word(dev->config + PCI_COMMAND);
2517 int i;
2518
2519 if (!(cmd & PCI_COMMAND_MEMORY)) {
2520 return;
2521 }
2522
2523 if (pc->is_bridge) {
2524 pcibus_t base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
2525 pcibus_t limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
2526
2527 base = MAX(base, 0x1ULL << 32);
2528
2529 if (limit >= base) {
2530 Range pref_range;
2531 range_set_bounds(&pref_range, base, limit);
2532 range_extend(range, &pref_range);
2533 }
2534 }
2535 for (i = 0; i < PCI_NUM_REGIONS; ++i) {
2536 PCIIORegion *r = &dev->io_regions[i];
2537 pcibus_t lob, upb;
2538 Range region_range;
2539
2540 if (!r->size ||
2541 (r->type & PCI_BASE_ADDRESS_SPACE_IO) ||
2542 !(r->type & PCI_BASE_ADDRESS_MEM_TYPE_64)) {
2543 continue;
2544 }
2545
2546 lob = pci_bar_address(dev, i, r->type, r->size);
2547 upb = lob + r->size - 1;
2548 if (lob == PCI_BAR_UNMAPPED) {
2549 continue;
2550 }
2551
2552 lob = MAX(lob, 0x1ULL << 32);
2553
2554 if (upb >= lob) {
2555 range_set_bounds(&region_range, lob, upb);
2556 range_extend(range, &region_range);
2557 }
2558 }
2559 }
2560
2561 void pci_bus_get_w64_range(PCIBus *bus, Range *range)
2562 {
2563 range_make_empty(range);
2564 pci_for_each_device_under_bus(bus, pci_dev_get_w64, range);
2565 }
2566
2567 static bool pcie_has_upstream_port(PCIDevice *dev)
2568 {
2569 PCIDevice *parent_dev = pci_bridge_get_device(dev->bus);
2570
2571 /* Device associated with an upstream port.
2572 * As there are several types of these, it's easier to check the
2573 * parent device: upstream ports are always connected to
2574 * root or downstream ports.
2575 */
2576 return parent_dev &&
2577 pci_is_express(parent_dev) &&
2578 parent_dev->exp.exp_cap &&
2579 (pcie_cap_get_type(parent_dev) == PCI_EXP_TYPE_ROOT_PORT ||
2580 pcie_cap_get_type(parent_dev) == PCI_EXP_TYPE_DOWNSTREAM);
2581 }
2582
2583 PCIDevice *pci_get_function_0(PCIDevice *pci_dev)
2584 {
2585 if(pcie_has_upstream_port(pci_dev)) {
2586 /* With an upstream PCIe port, we only support 1 device at slot 0 */
2587 return pci_dev->bus->devices[0];
2588 } else {
2589 /* Other bus types might support multiple devices at slots 0-31 */
2590 return pci_dev->bus->devices[PCI_DEVFN(PCI_SLOT(pci_dev->devfn), 0)];
2591 }
2592 }
2593
2594 MSIMessage pci_get_msi_message(PCIDevice *dev, int vector)
2595 {
2596 MSIMessage msg;
2597 if (msix_enabled(dev)) {
2598 msg = msix_get_message(dev, vector);
2599 } else if (msi_enabled(dev)) {
2600 msg = msi_get_message(dev, vector);
2601 } else {
2602 /* Should never happen */
2603 error_report("%s: unknown interrupt type", __func__);
2604 abort();
2605 }
2606 return msg;
2607 }
2608
2609 static const TypeInfo pci_device_type_info = {
2610 .name = TYPE_PCI_DEVICE,
2611 .parent = TYPE_DEVICE,
2612 .instance_size = sizeof(PCIDevice),
2613 .abstract = true,
2614 .class_size = sizeof(PCIDeviceClass),
2615 .class_init = pci_device_class_init,
2616 };
2617
2618 static void pci_register_types(void)
2619 {
2620 type_register_static(&pci_bus_info);
2621 type_register_static(&pcie_bus_info);
2622 type_register_static(&pci_device_type_info);
2623 }
2624
2625 type_init(pci_register_types)
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