4 * Copyright (c) 2004 Fabrice Bellard
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
25 #include "qemu/osdep.h"
26 #include "qemu-common.h"
28 #include "hw/pci/pci.h"
29 #include "hw/pci/pci_bridge.h"
30 #include "hw/pci/pci_bus.h"
31 #include "hw/pci/pci_host.h"
32 #include "migration/qemu-file-types.h"
33 #include "migration/vmstate.h"
34 #include "monitor/monitor.h"
36 #include "sysemu/sysemu.h"
37 #include "hw/loader.h"
38 #include "qemu/error-report.h"
39 #include "qemu/range.h"
41 #include "hw/pci/msi.h"
42 #include "hw/pci/msix.h"
43 #include "exec/address-spaces.h"
44 #include "hw/hotplug.h"
45 #include "hw/boards.h"
46 #include "qapi/error.h"
47 #include "qapi/qapi-commands-misc.h"
48 #include "qemu/cutils.h"
52 # define PCI_DPRINTF(format, ...) printf(format, ## __VA_ARGS__)
54 # define PCI_DPRINTF(format, ...) do { } while (0)
57 bool pci_available = true;
59 static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent);
60 static char *pcibus_get_dev_path(DeviceState *dev);
61 static char *pcibus_get_fw_dev_path(DeviceState *dev);
62 static void pcibus_reset(BusState *qbus);
64 static Property pci_props[] = {
65 DEFINE_PROP_PCI_DEVFN("addr", PCIDevice, devfn, -1),
66 DEFINE_PROP_STRING("romfile", PCIDevice, romfile),
67 DEFINE_PROP_UINT32("rombar", PCIDevice, rom_bar, 1),
68 DEFINE_PROP_BIT("multifunction", PCIDevice, cap_present,
69 QEMU_PCI_CAP_MULTIFUNCTION_BITNR, false),
70 DEFINE_PROP_BIT("command_serr_enable", PCIDevice, cap_present,
71 QEMU_PCI_CAP_SERR_BITNR, true),
72 DEFINE_PROP_BIT("x-pcie-lnksta-dllla", PCIDevice, cap_present,
73 QEMU_PCIE_LNKSTA_DLLLA_BITNR, true),
74 DEFINE_PROP_BIT("x-pcie-extcap-init", PCIDevice, cap_present,
75 QEMU_PCIE_EXTCAP_INIT_BITNR, true),
76 DEFINE_PROP_END_OF_LIST()
79 static const VMStateDescription vmstate_pcibus = {
82 .minimum_version_id = 1,
83 .fields = (VMStateField[]) {
84 VMSTATE_INT32_EQUAL(nirq, PCIBus, NULL),
85 VMSTATE_VARRAY_INT32(irq_count, PCIBus,
86 nirq, 0, vmstate_info_int32,
92 static void pci_init_bus_master(PCIDevice *pci_dev)
94 AddressSpace *dma_as = pci_device_iommu_address_space(pci_dev);
96 memory_region_init_alias(&pci_dev->bus_master_enable_region,
97 OBJECT(pci_dev), "bus master",
98 dma_as->root, 0, memory_region_size(dma_as->root));
99 memory_region_set_enabled(&pci_dev->bus_master_enable_region, false);
100 memory_region_add_subregion(&pci_dev->bus_master_container_region, 0,
101 &pci_dev->bus_master_enable_region);
104 static void pcibus_machine_done(Notifier *notifier, void *data)
106 PCIBus *bus = container_of(notifier, PCIBus, machine_done);
109 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) {
110 if (bus->devices[i]) {
111 pci_init_bus_master(bus->devices[i]);
116 static void pci_bus_realize(BusState *qbus, Error **errp)
118 PCIBus *bus = PCI_BUS(qbus);
120 bus->machine_done.notify = pcibus_machine_done;
121 qemu_add_machine_init_done_notifier(&bus->machine_done);
123 vmstate_register(NULL, -1, &vmstate_pcibus, bus);
126 static void pcie_bus_realize(BusState *qbus, Error **errp)
128 PCIBus *bus = PCI_BUS(qbus);
130 pci_bus_realize(qbus, errp);
133 * A PCI-E bus can support extended config space if it's the root
134 * bus, or if the bus/bridge above it does as well
136 if (pci_bus_is_root(bus)) {
137 bus->flags |= PCI_BUS_EXTENDED_CONFIG_SPACE;
139 PCIBus *parent_bus = pci_get_bus(bus->parent_dev);
141 if (pci_bus_allows_extended_config_space(parent_bus)) {
142 bus->flags |= PCI_BUS_EXTENDED_CONFIG_SPACE;
147 static void pci_bus_unrealize(BusState *qbus, Error **errp)
149 PCIBus *bus = PCI_BUS(qbus);
151 qemu_remove_machine_init_done_notifier(&bus->machine_done);
153 vmstate_unregister(NULL, &vmstate_pcibus, bus);
156 static int pcibus_num(PCIBus *bus)
158 if (pci_bus_is_root(bus)) {
159 return 0; /* pci host bridge */
161 return bus->parent_dev->config[PCI_SECONDARY_BUS];
164 static uint16_t pcibus_numa_node(PCIBus *bus)
166 return NUMA_NODE_UNASSIGNED;
169 static void pci_bus_class_init(ObjectClass *klass, void *data)
171 BusClass *k = BUS_CLASS(klass);
172 PCIBusClass *pbc = PCI_BUS_CLASS(klass);
174 k->print_dev = pcibus_dev_print;
175 k->get_dev_path = pcibus_get_dev_path;
176 k->get_fw_dev_path = pcibus_get_fw_dev_path;
177 k->realize = pci_bus_realize;
178 k->unrealize = pci_bus_unrealize;
179 k->reset = pcibus_reset;
181 pbc->bus_num = pcibus_num;
182 pbc->numa_node = pcibus_numa_node;
185 static const TypeInfo pci_bus_info = {
186 .name = TYPE_PCI_BUS,
188 .instance_size = sizeof(PCIBus),
189 .class_size = sizeof(PCIBusClass),
190 .class_init = pci_bus_class_init,
193 static const TypeInfo pcie_interface_info = {
194 .name = INTERFACE_PCIE_DEVICE,
195 .parent = TYPE_INTERFACE,
198 static const TypeInfo conventional_pci_interface_info = {
199 .name = INTERFACE_CONVENTIONAL_PCI_DEVICE,
200 .parent = TYPE_INTERFACE,
203 static void pcie_bus_class_init(ObjectClass *klass, void *data)
205 BusClass *k = BUS_CLASS(klass);
207 k->realize = pcie_bus_realize;
210 static const TypeInfo pcie_bus_info = {
211 .name = TYPE_PCIE_BUS,
212 .parent = TYPE_PCI_BUS,
213 .class_init = pcie_bus_class_init,
216 static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num);
217 static void pci_update_mappings(PCIDevice *d);
218 static void pci_irq_handler(void *opaque, int irq_num, int level);
219 static void pci_add_option_rom(PCIDevice *pdev, bool is_default_rom, Error **);
220 static void pci_del_option_rom(PCIDevice *pdev);
222 static uint16_t pci_default_sub_vendor_id = PCI_SUBVENDOR_ID_REDHAT_QUMRANET;
223 static uint16_t pci_default_sub_device_id = PCI_SUBDEVICE_ID_QEMU;
225 static QLIST_HEAD(, PCIHostState) pci_host_bridges;
227 int pci_bar(PCIDevice *d, int reg)
231 if (reg != PCI_ROM_SLOT)
232 return PCI_BASE_ADDRESS_0 + reg * 4;
234 type = d->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION;
235 return type == PCI_HEADER_TYPE_BRIDGE ? PCI_ROM_ADDRESS1 : PCI_ROM_ADDRESS;
238 static inline int pci_irq_state(PCIDevice *d, int irq_num)
240 return (d->irq_state >> irq_num) & 0x1;
243 static inline void pci_set_irq_state(PCIDevice *d, int irq_num, int level)
245 d->irq_state &= ~(0x1 << irq_num);
246 d->irq_state |= level << irq_num;
249 static void pci_change_irq_level(PCIDevice *pci_dev, int irq_num, int change)
253 bus = pci_get_bus(pci_dev);
254 irq_num = bus->map_irq(pci_dev, irq_num);
257 pci_dev = bus->parent_dev;
259 bus->irq_count[irq_num] += change;
260 bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0);
263 int pci_bus_get_irq_level(PCIBus *bus, int irq_num)
265 assert(irq_num >= 0);
266 assert(irq_num < bus->nirq);
267 return !!bus->irq_count[irq_num];
270 /* Update interrupt status bit in config space on interrupt
272 static void pci_update_irq_status(PCIDevice *dev)
274 if (dev->irq_state) {
275 dev->config[PCI_STATUS] |= PCI_STATUS_INTERRUPT;
277 dev->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT;
281 void pci_device_deassert_intx(PCIDevice *dev)
284 for (i = 0; i < PCI_NUM_PINS; ++i) {
285 pci_irq_handler(dev, i, 0);
289 static void pci_do_device_reset(PCIDevice *dev)
293 pci_device_deassert_intx(dev);
294 assert(dev->irq_state == 0);
296 /* Clear all writable bits */
297 pci_word_test_and_clear_mask(dev->config + PCI_COMMAND,
298 pci_get_word(dev->wmask + PCI_COMMAND) |
299 pci_get_word(dev->w1cmask + PCI_COMMAND));
300 pci_word_test_and_clear_mask(dev->config + PCI_STATUS,
301 pci_get_word(dev->wmask + PCI_STATUS) |
302 pci_get_word(dev->w1cmask + PCI_STATUS));
303 dev->config[PCI_CACHE_LINE_SIZE] = 0x0;
304 dev->config[PCI_INTERRUPT_LINE] = 0x0;
305 for (r = 0; r < PCI_NUM_REGIONS; ++r) {
306 PCIIORegion *region = &dev->io_regions[r];
311 if (!(region->type & PCI_BASE_ADDRESS_SPACE_IO) &&
312 region->type & PCI_BASE_ADDRESS_MEM_TYPE_64) {
313 pci_set_quad(dev->config + pci_bar(dev, r), region->type);
315 pci_set_long(dev->config + pci_bar(dev, r), region->type);
318 pci_update_mappings(dev);
325 * This function is called on #RST and FLR.
326 * FLR if PCI_EXP_DEVCTL_BCR_FLR is set
328 void pci_device_reset(PCIDevice *dev)
330 qdev_reset_all(&dev->qdev);
331 pci_do_device_reset(dev);
335 * Trigger pci bus reset under a given bus.
336 * Called via qbus_reset_all on RST# assert, after the devices
337 * have been reset qdev_reset_all-ed already.
339 static void pcibus_reset(BusState *qbus)
341 PCIBus *bus = DO_UPCAST(PCIBus, qbus, qbus);
344 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) {
345 if (bus->devices[i]) {
346 pci_do_device_reset(bus->devices[i]);
350 for (i = 0; i < bus->nirq; i++) {
351 assert(bus->irq_count[i] == 0);
355 static void pci_host_bus_register(DeviceState *host)
357 PCIHostState *host_bridge = PCI_HOST_BRIDGE(host);
359 QLIST_INSERT_HEAD(&pci_host_bridges, host_bridge, next);
362 static void pci_host_bus_unregister(DeviceState *host)
364 PCIHostState *host_bridge = PCI_HOST_BRIDGE(host);
366 QLIST_REMOVE(host_bridge, next);
369 PCIBus *pci_device_root_bus(const PCIDevice *d)
371 PCIBus *bus = pci_get_bus(d);
373 while (!pci_bus_is_root(bus)) {
377 bus = pci_get_bus(d);
383 const char *pci_root_bus_path(PCIDevice *dev)
385 PCIBus *rootbus = pci_device_root_bus(dev);
386 PCIHostState *host_bridge = PCI_HOST_BRIDGE(rootbus->qbus.parent);
387 PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_GET_CLASS(host_bridge);
389 assert(host_bridge->bus == rootbus);
391 if (hc->root_bus_path) {
392 return (*hc->root_bus_path)(host_bridge, rootbus);
395 return rootbus->qbus.name;
398 static void pci_root_bus_init(PCIBus *bus, DeviceState *parent,
399 MemoryRegion *address_space_mem,
400 MemoryRegion *address_space_io,
403 assert(PCI_FUNC(devfn_min) == 0);
404 bus->devfn_min = devfn_min;
405 bus->slot_reserved_mask = 0x0;
406 bus->address_space_mem = address_space_mem;
407 bus->address_space_io = address_space_io;
408 bus->flags |= PCI_BUS_IS_ROOT;
411 QLIST_INIT(&bus->child);
413 pci_host_bus_register(parent);
416 static void pci_bus_uninit(PCIBus *bus)
418 pci_host_bus_unregister(BUS(bus)->parent);
421 bool pci_bus_is_express(PCIBus *bus)
423 return object_dynamic_cast(OBJECT(bus), TYPE_PCIE_BUS);
426 void pci_root_bus_new_inplace(PCIBus *bus, size_t bus_size, DeviceState *parent,
428 MemoryRegion *address_space_mem,
429 MemoryRegion *address_space_io,
430 uint8_t devfn_min, const char *typename)
432 qbus_create_inplace(bus, bus_size, typename, parent, name);
433 pci_root_bus_init(bus, parent, address_space_mem, address_space_io,
437 PCIBus *pci_root_bus_new(DeviceState *parent, const char *name,
438 MemoryRegion *address_space_mem,
439 MemoryRegion *address_space_io,
440 uint8_t devfn_min, const char *typename)
444 bus = PCI_BUS(qbus_create(typename, parent, name));
445 pci_root_bus_init(bus, parent, address_space_mem, address_space_io,
450 void pci_root_bus_cleanup(PCIBus *bus)
453 /* the caller of the unplug hotplug handler will delete this device */
454 object_property_set_bool(OBJECT(bus), false, "realized", NULL);
457 void pci_bus_irqs(PCIBus *bus, pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
458 void *irq_opaque, int nirq)
460 bus->set_irq = set_irq;
461 bus->map_irq = map_irq;
462 bus->irq_opaque = irq_opaque;
464 bus->irq_count = g_malloc0(nirq * sizeof(bus->irq_count[0]));
467 void pci_bus_irqs_cleanup(PCIBus *bus)
471 bus->irq_opaque = NULL;
473 g_free(bus->irq_count);
476 PCIBus *pci_register_root_bus(DeviceState *parent, const char *name,
477 pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
479 MemoryRegion *address_space_mem,
480 MemoryRegion *address_space_io,
481 uint8_t devfn_min, int nirq,
482 const char *typename)
486 bus = pci_root_bus_new(parent, name, address_space_mem,
487 address_space_io, devfn_min, typename);
488 pci_bus_irqs(bus, set_irq, map_irq, irq_opaque, nirq);
492 void pci_unregister_root_bus(PCIBus *bus)
494 pci_bus_irqs_cleanup(bus);
495 pci_root_bus_cleanup(bus);
498 int pci_bus_num(PCIBus *s)
500 return PCI_BUS_GET_CLASS(s)->bus_num(s);
503 int pci_bus_numa_node(PCIBus *bus)
505 return PCI_BUS_GET_CLASS(bus)->numa_node(bus);
508 static int get_pci_config_device(QEMUFile *f, void *pv, size_t size,
509 const VMStateField *field)
511 PCIDevice *s = container_of(pv, PCIDevice, config);
512 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(s);
516 assert(size == pci_config_size(s));
517 config = g_malloc(size);
519 qemu_get_buffer(f, config, size);
520 for (i = 0; i < size; ++i) {
521 if ((config[i] ^ s->config[i]) &
522 s->cmask[i] & ~s->wmask[i] & ~s->w1cmask[i]) {
523 error_report("%s: Bad config data: i=0x%x read: %x device: %x "
524 "cmask: %x wmask: %x w1cmask:%x", __func__,
525 i, config[i], s->config[i],
526 s->cmask[i], s->wmask[i], s->w1cmask[i]);
531 memcpy(s->config, config, size);
533 pci_update_mappings(s);
535 PCIBridge *b = PCI_BRIDGE(s);
536 pci_bridge_update_mappings(b);
539 memory_region_set_enabled(&s->bus_master_enable_region,
540 pci_get_word(s->config + PCI_COMMAND)
541 & PCI_COMMAND_MASTER);
547 /* just put buffer */
548 static int put_pci_config_device(QEMUFile *f, void *pv, size_t size,
549 const VMStateField *field, QJSON *vmdesc)
551 const uint8_t **v = pv;
552 assert(size == pci_config_size(container_of(pv, PCIDevice, config)));
553 qemu_put_buffer(f, *v, size);
558 static VMStateInfo vmstate_info_pci_config = {
559 .name = "pci config",
560 .get = get_pci_config_device,
561 .put = put_pci_config_device,
564 static int get_pci_irq_state(QEMUFile *f, void *pv, size_t size,
565 const VMStateField *field)
567 PCIDevice *s = container_of(pv, PCIDevice, irq_state);
568 uint32_t irq_state[PCI_NUM_PINS];
570 for (i = 0; i < PCI_NUM_PINS; ++i) {
571 irq_state[i] = qemu_get_be32(f);
572 if (irq_state[i] != 0x1 && irq_state[i] != 0) {
573 fprintf(stderr, "irq state %d: must be 0 or 1.\n",
579 for (i = 0; i < PCI_NUM_PINS; ++i) {
580 pci_set_irq_state(s, i, irq_state[i]);
586 static int put_pci_irq_state(QEMUFile *f, void *pv, size_t size,
587 const VMStateField *field, QJSON *vmdesc)
590 PCIDevice *s = container_of(pv, PCIDevice, irq_state);
592 for (i = 0; i < PCI_NUM_PINS; ++i) {
593 qemu_put_be32(f, pci_irq_state(s, i));
599 static VMStateInfo vmstate_info_pci_irq_state = {
600 .name = "pci irq state",
601 .get = get_pci_irq_state,
602 .put = put_pci_irq_state,
605 static bool migrate_is_pcie(void *opaque, int version_id)
607 return pci_is_express((PCIDevice *)opaque);
610 static bool migrate_is_not_pcie(void *opaque, int version_id)
612 return !pci_is_express((PCIDevice *)opaque);
615 const VMStateDescription vmstate_pci_device = {
618 .minimum_version_id = 1,
619 .fields = (VMStateField[]) {
620 VMSTATE_INT32_POSITIVE_LE(version_id, PCIDevice),
621 VMSTATE_BUFFER_UNSAFE_INFO_TEST(config, PCIDevice,
623 0, vmstate_info_pci_config,
624 PCI_CONFIG_SPACE_SIZE),
625 VMSTATE_BUFFER_UNSAFE_INFO_TEST(config, PCIDevice,
627 0, vmstate_info_pci_config,
628 PCIE_CONFIG_SPACE_SIZE),
629 VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2,
630 vmstate_info_pci_irq_state,
631 PCI_NUM_PINS * sizeof(int32_t)),
632 VMSTATE_END_OF_LIST()
637 void pci_device_save(PCIDevice *s, QEMUFile *f)
639 /* Clear interrupt status bit: it is implicit
640 * in irq_state which we are saving.
641 * This makes us compatible with old devices
642 * which never set or clear this bit. */
643 s->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT;
644 vmstate_save_state(f, &vmstate_pci_device, s, NULL);
645 /* Restore the interrupt status bit. */
646 pci_update_irq_status(s);
649 int pci_device_load(PCIDevice *s, QEMUFile *f)
652 ret = vmstate_load_state(f, &vmstate_pci_device, s, s->version_id);
653 /* Restore the interrupt status bit. */
654 pci_update_irq_status(s);
658 static void pci_set_default_subsystem_id(PCIDevice *pci_dev)
660 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID,
661 pci_default_sub_vendor_id);
662 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID,
663 pci_default_sub_device_id);
667 * Parse [[<domain>:]<bus>:]<slot>, return -1 on error if funcp == NULL
668 * [[<domain>:]<bus>:]<slot>.<func>, return -1 on error
670 static int pci_parse_devaddr(const char *addr, int *domp, int *busp,
671 unsigned int *slotp, unsigned int *funcp)
676 unsigned long dom = 0, bus = 0;
677 unsigned int slot = 0;
678 unsigned int func = 0;
681 val = strtoul(p, &e, 16);
687 val = strtoul(p, &e, 16);
694 val = strtoul(p, &e, 16);
707 val = strtoul(p, &e, 16);
714 /* if funcp == NULL func is 0 */
715 if (dom > 0xffff || bus > 0xff || slot > 0x1f || func > 7)
729 static void pci_init_cmask(PCIDevice *dev)
731 pci_set_word(dev->cmask + PCI_VENDOR_ID, 0xffff);
732 pci_set_word(dev->cmask + PCI_DEVICE_ID, 0xffff);
733 dev->cmask[PCI_STATUS] = PCI_STATUS_CAP_LIST;
734 dev->cmask[PCI_REVISION_ID] = 0xff;
735 dev->cmask[PCI_CLASS_PROG] = 0xff;
736 pci_set_word(dev->cmask + PCI_CLASS_DEVICE, 0xffff);
737 dev->cmask[PCI_HEADER_TYPE] = 0xff;
738 dev->cmask[PCI_CAPABILITY_LIST] = 0xff;
741 static void pci_init_wmask(PCIDevice *dev)
743 int config_size = pci_config_size(dev);
745 dev->wmask[PCI_CACHE_LINE_SIZE] = 0xff;
746 dev->wmask[PCI_INTERRUPT_LINE] = 0xff;
747 pci_set_word(dev->wmask + PCI_COMMAND,
748 PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
749 PCI_COMMAND_INTX_DISABLE);
750 if (dev->cap_present & QEMU_PCI_CAP_SERR) {
751 pci_word_test_and_set_mask(dev->wmask + PCI_COMMAND, PCI_COMMAND_SERR);
754 memset(dev->wmask + PCI_CONFIG_HEADER_SIZE, 0xff,
755 config_size - PCI_CONFIG_HEADER_SIZE);
758 static void pci_init_w1cmask(PCIDevice *dev)
761 * Note: It's okay to set w1cmask even for readonly bits as
762 * long as their value is hardwired to 0.
764 pci_set_word(dev->w1cmask + PCI_STATUS,
765 PCI_STATUS_PARITY | PCI_STATUS_SIG_TARGET_ABORT |
766 PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_REC_MASTER_ABORT |
767 PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY);
770 static void pci_init_mask_bridge(PCIDevice *d)
772 /* PCI_PRIMARY_BUS, PCI_SECONDARY_BUS, PCI_SUBORDINATE_BUS and
773 PCI_SEC_LETENCY_TIMER */
774 memset(d->wmask + PCI_PRIMARY_BUS, 0xff, 4);
777 d->wmask[PCI_IO_BASE] = PCI_IO_RANGE_MASK & 0xff;
778 d->wmask[PCI_IO_LIMIT] = PCI_IO_RANGE_MASK & 0xff;
779 pci_set_word(d->wmask + PCI_MEMORY_BASE,
780 PCI_MEMORY_RANGE_MASK & 0xffff);
781 pci_set_word(d->wmask + PCI_MEMORY_LIMIT,
782 PCI_MEMORY_RANGE_MASK & 0xffff);
783 pci_set_word(d->wmask + PCI_PREF_MEMORY_BASE,
784 PCI_PREF_RANGE_MASK & 0xffff);
785 pci_set_word(d->wmask + PCI_PREF_MEMORY_LIMIT,
786 PCI_PREF_RANGE_MASK & 0xffff);
788 /* PCI_PREF_BASE_UPPER32 and PCI_PREF_LIMIT_UPPER32 */
789 memset(d->wmask + PCI_PREF_BASE_UPPER32, 0xff, 8);
791 /* Supported memory and i/o types */
792 d->config[PCI_IO_BASE] |= PCI_IO_RANGE_TYPE_16;
793 d->config[PCI_IO_LIMIT] |= PCI_IO_RANGE_TYPE_16;
794 pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_BASE,
795 PCI_PREF_RANGE_TYPE_64);
796 pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_LIMIT,
797 PCI_PREF_RANGE_TYPE_64);
800 * TODO: Bridges default to 10-bit VGA decoding but we currently only
801 * implement 16-bit decoding (no alias support).
803 pci_set_word(d->wmask + PCI_BRIDGE_CONTROL,
804 PCI_BRIDGE_CTL_PARITY |
805 PCI_BRIDGE_CTL_SERR |
808 PCI_BRIDGE_CTL_VGA_16BIT |
809 PCI_BRIDGE_CTL_MASTER_ABORT |
810 PCI_BRIDGE_CTL_BUS_RESET |
811 PCI_BRIDGE_CTL_FAST_BACK |
812 PCI_BRIDGE_CTL_DISCARD |
813 PCI_BRIDGE_CTL_SEC_DISCARD |
814 PCI_BRIDGE_CTL_DISCARD_SERR);
815 /* Below does not do anything as we never set this bit, put here for
817 pci_set_word(d->w1cmask + PCI_BRIDGE_CONTROL,
818 PCI_BRIDGE_CTL_DISCARD_STATUS);
819 d->cmask[PCI_IO_BASE] |= PCI_IO_RANGE_TYPE_MASK;
820 d->cmask[PCI_IO_LIMIT] |= PCI_IO_RANGE_TYPE_MASK;
821 pci_word_test_and_set_mask(d->cmask + PCI_PREF_MEMORY_BASE,
822 PCI_PREF_RANGE_TYPE_MASK);
823 pci_word_test_and_set_mask(d->cmask + PCI_PREF_MEMORY_LIMIT,
824 PCI_PREF_RANGE_TYPE_MASK);
827 static void pci_init_multifunction(PCIBus *bus, PCIDevice *dev, Error **errp)
829 uint8_t slot = PCI_SLOT(dev->devfn);
832 if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
833 dev->config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION;
837 * multifunction bit is interpreted in two ways as follows.
838 * - all functions must set the bit to 1.
840 * - function 0 must set the bit, but the rest function (> 0)
841 * is allowed to leave the bit to 0.
842 * Example: PIIX3(also in qemu), PIIX4(also in qemu), ICH10,
844 * So OS (at least Linux) checks the bit of only function 0,
845 * and doesn't see the bit of function > 0.
847 * The below check allows both interpretation.
849 if (PCI_FUNC(dev->devfn)) {
850 PCIDevice *f0 = bus->devices[PCI_DEVFN(slot, 0)];
851 if (f0 && !(f0->cap_present & QEMU_PCI_CAP_MULTIFUNCTION)) {
852 /* function 0 should set multifunction bit */
853 error_setg(errp, "PCI: single function device can't be populated "
854 "in function %x.%x", slot, PCI_FUNC(dev->devfn));
860 if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
863 /* function 0 indicates single function, so function > 0 must be NULL */
864 for (func = 1; func < PCI_FUNC_MAX; ++func) {
865 if (bus->devices[PCI_DEVFN(slot, func)]) {
866 error_setg(errp, "PCI: %x.0 indicates single function, "
867 "but %x.%x is already populated.",
874 static void pci_config_alloc(PCIDevice *pci_dev)
876 int config_size = pci_config_size(pci_dev);
878 pci_dev->config = g_malloc0(config_size);
879 pci_dev->cmask = g_malloc0(config_size);
880 pci_dev->wmask = g_malloc0(config_size);
881 pci_dev->w1cmask = g_malloc0(config_size);
882 pci_dev->used = g_malloc0(config_size);
885 static void pci_config_free(PCIDevice *pci_dev)
887 g_free(pci_dev->config);
888 g_free(pci_dev->cmask);
889 g_free(pci_dev->wmask);
890 g_free(pci_dev->w1cmask);
891 g_free(pci_dev->used);
894 static void do_pci_unregister_device(PCIDevice *pci_dev)
896 pci_get_bus(pci_dev)->devices[pci_dev->devfn] = NULL;
897 pci_config_free(pci_dev);
899 if (memory_region_is_mapped(&pci_dev->bus_master_enable_region)) {
900 memory_region_del_subregion(&pci_dev->bus_master_container_region,
901 &pci_dev->bus_master_enable_region);
903 address_space_destroy(&pci_dev->bus_master_as);
906 /* Extract PCIReqIDCache into BDF format */
907 static uint16_t pci_req_id_cache_extract(PCIReqIDCache *cache)
912 switch (cache->type) {
914 result = pci_get_bdf(cache->dev);
916 case PCI_REQ_ID_SECONDARY_BUS:
917 bus_n = pci_dev_bus_num(cache->dev);
918 result = PCI_BUILD_BDF(bus_n, 0);
921 error_report("Invalid PCI requester ID cache type: %d",
930 /* Parse bridges up to the root complex and return requester ID
931 * cache for specific device. For full PCIe topology, the cache
932 * result would be exactly the same as getting BDF of the device.
933 * However, several tricks are required when system mixed up with
934 * legacy PCI devices and PCIe-to-PCI bridges.
936 * Here we cache the proxy device (and type) not requester ID since
937 * bus number might change from time to time.
939 static PCIReqIDCache pci_req_id_cache_get(PCIDevice *dev)
942 PCIReqIDCache cache = {
944 .type = PCI_REQ_ID_BDF,
947 while (!pci_bus_is_root(pci_get_bus(dev))) {
948 /* We are under PCI/PCIe bridges */
949 parent = pci_get_bus(dev)->parent_dev;
950 if (pci_is_express(parent)) {
951 if (pcie_cap_get_type(parent) == PCI_EXP_TYPE_PCI_BRIDGE) {
952 /* When we pass through PCIe-to-PCI/PCIX bridges, we
953 * override the requester ID using secondary bus
954 * number of parent bridge with zeroed devfn
955 * (pcie-to-pci bridge spec chap 2.3). */
956 cache.type = PCI_REQ_ID_SECONDARY_BUS;
960 /* Legacy PCI, override requester ID with the bridge's
961 * BDF upstream. When the root complex connects to
962 * legacy PCI devices (including buses), it can only
963 * obtain requester ID info from directly attached
964 * devices. If devices are attached under bridges, only
965 * the requester ID of the bridge that is directly
966 * attached to the root complex can be recognized. */
967 cache.type = PCI_REQ_ID_BDF;
976 uint16_t pci_requester_id(PCIDevice *dev)
978 return pci_req_id_cache_extract(&dev->requester_id_cache);
981 static bool pci_bus_devfn_available(PCIBus *bus, int devfn)
983 return !(bus->devices[devfn]);
986 static bool pci_bus_devfn_reserved(PCIBus *bus, int devfn)
988 return bus->slot_reserved_mask & (1UL << PCI_SLOT(devfn));
991 /* -1 for devfn means auto assign */
992 static PCIDevice *do_pci_register_device(PCIDevice *pci_dev,
993 const char *name, int devfn,
996 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev);
997 PCIConfigReadFunc *config_read = pc->config_read;
998 PCIConfigWriteFunc *config_write = pc->config_write;
999 Error *local_err = NULL;
1000 DeviceState *dev = DEVICE(pci_dev);
1001 PCIBus *bus = pci_get_bus(pci_dev);
1003 /* Only pci bridges can be attached to extra PCI root buses */
1004 if (pci_bus_is_root(bus) && bus->parent_dev && !pc->is_bridge) {
1006 "PCI: Only PCI/PCIe bridges can be plugged into %s",
1007 bus->parent_dev->name);
1012 for(devfn = bus->devfn_min ; devfn < ARRAY_SIZE(bus->devices);
1013 devfn += PCI_FUNC_MAX) {
1014 if (pci_bus_devfn_available(bus, devfn) &&
1015 !pci_bus_devfn_reserved(bus, devfn)) {
1019 error_setg(errp, "PCI: no slot/function available for %s, all in use "
1020 "or reserved", name);
1023 } else if (pci_bus_devfn_reserved(bus, devfn)) {
1024 error_setg(errp, "PCI: slot %d function %d not available for %s,"
1026 PCI_SLOT(devfn), PCI_FUNC(devfn), name);
1028 } else if (!pci_bus_devfn_available(bus, devfn)) {
1029 error_setg(errp, "PCI: slot %d function %d not available for %s,"
1031 PCI_SLOT(devfn), PCI_FUNC(devfn), name,
1032 bus->devices[devfn]->name);
1034 } else if (dev->hotplugged &&
1035 pci_get_function_0(pci_dev)) {
1036 error_setg(errp, "PCI: slot %d function 0 already ocuppied by %s,"
1037 " new func %s cannot be exposed to guest.",
1038 PCI_SLOT(pci_get_function_0(pci_dev)->devfn),
1039 pci_get_function_0(pci_dev)->name,
1045 pci_dev->devfn = devfn;
1046 pci_dev->requester_id_cache = pci_req_id_cache_get(pci_dev);
1047 pstrcpy(pci_dev->name, sizeof(pci_dev->name), name);
1049 memory_region_init(&pci_dev->bus_master_container_region, OBJECT(pci_dev),
1050 "bus master container", UINT64_MAX);
1051 address_space_init(&pci_dev->bus_master_as,
1052 &pci_dev->bus_master_container_region, pci_dev->name);
1055 pci_init_bus_master(pci_dev);
1057 pci_dev->irq_state = 0;
1058 pci_config_alloc(pci_dev);
1060 pci_config_set_vendor_id(pci_dev->config, pc->vendor_id);
1061 pci_config_set_device_id(pci_dev->config, pc->device_id);
1062 pci_config_set_revision(pci_dev->config, pc->revision);
1063 pci_config_set_class(pci_dev->config, pc->class_id);
1065 if (!pc->is_bridge) {
1066 if (pc->subsystem_vendor_id || pc->subsystem_id) {
1067 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID,
1068 pc->subsystem_vendor_id);
1069 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID,
1072 pci_set_default_subsystem_id(pci_dev);
1075 /* subsystem_vendor_id/subsystem_id are only for header type 0 */
1076 assert(!pc->subsystem_vendor_id);
1077 assert(!pc->subsystem_id);
1079 pci_init_cmask(pci_dev);
1080 pci_init_wmask(pci_dev);
1081 pci_init_w1cmask(pci_dev);
1082 if (pc->is_bridge) {
1083 pci_init_mask_bridge(pci_dev);
1085 pci_init_multifunction(bus, pci_dev, &local_err);
1087 error_propagate(errp, local_err);
1088 do_pci_unregister_device(pci_dev);
1093 config_read = pci_default_read_config;
1095 config_write = pci_default_write_config;
1096 pci_dev->config_read = config_read;
1097 pci_dev->config_write = config_write;
1098 bus->devices[devfn] = pci_dev;
1099 pci_dev->version_id = 2; /* Current pci device vmstate version */
1103 static void pci_unregister_io_regions(PCIDevice *pci_dev)
1108 for(i = 0; i < PCI_NUM_REGIONS; i++) {
1109 r = &pci_dev->io_regions[i];
1110 if (!r->size || r->addr == PCI_BAR_UNMAPPED)
1112 memory_region_del_subregion(r->address_space, r->memory);
1115 pci_unregister_vga(pci_dev);
1118 static void pci_qdev_unrealize(DeviceState *dev, Error **errp)
1120 PCIDevice *pci_dev = PCI_DEVICE(dev);
1121 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev);
1123 pci_unregister_io_regions(pci_dev);
1124 pci_del_option_rom(pci_dev);
1130 pci_device_deassert_intx(pci_dev);
1131 do_pci_unregister_device(pci_dev);
1134 void pci_register_bar(PCIDevice *pci_dev, int region_num,
1135 uint8_t type, MemoryRegion *memory)
1138 uint32_t addr; /* offset in pci config space */
1140 pcibus_t size = memory_region_size(memory);
1142 assert(region_num >= 0);
1143 assert(region_num < PCI_NUM_REGIONS);
1144 if (size & (size-1)) {
1145 error_report("ERROR: PCI region size must be pow2 "
1146 "type=0x%x, size=0x%"FMT_PCIBUS"", type, size);
1150 r = &pci_dev->io_regions[region_num];
1151 r->addr = PCI_BAR_UNMAPPED;
1155 r->address_space = type & PCI_BASE_ADDRESS_SPACE_IO
1156 ? pci_get_bus(pci_dev)->address_space_io
1157 : pci_get_bus(pci_dev)->address_space_mem;
1159 wmask = ~(size - 1);
1160 if (region_num == PCI_ROM_SLOT) {
1161 /* ROM enable bit is writable */
1162 wmask |= PCI_ROM_ADDRESS_ENABLE;
1165 addr = pci_bar(pci_dev, region_num);
1166 pci_set_long(pci_dev->config + addr, type);
1168 if (!(r->type & PCI_BASE_ADDRESS_SPACE_IO) &&
1169 r->type & PCI_BASE_ADDRESS_MEM_TYPE_64) {
1170 pci_set_quad(pci_dev->wmask + addr, wmask);
1171 pci_set_quad(pci_dev->cmask + addr, ~0ULL);
1173 pci_set_long(pci_dev->wmask + addr, wmask & 0xffffffff);
1174 pci_set_long(pci_dev->cmask + addr, 0xffffffff);
1178 static void pci_update_vga(PCIDevice *pci_dev)
1182 if (!pci_dev->has_vga) {
1186 cmd = pci_get_word(pci_dev->config + PCI_COMMAND);
1188 memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_MEM],
1189 cmd & PCI_COMMAND_MEMORY);
1190 memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO],
1191 cmd & PCI_COMMAND_IO);
1192 memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI],
1193 cmd & PCI_COMMAND_IO);
1196 void pci_register_vga(PCIDevice *pci_dev, MemoryRegion *mem,
1197 MemoryRegion *io_lo, MemoryRegion *io_hi)
1199 PCIBus *bus = pci_get_bus(pci_dev);
1201 assert(!pci_dev->has_vga);
1203 assert(memory_region_size(mem) == QEMU_PCI_VGA_MEM_SIZE);
1204 pci_dev->vga_regions[QEMU_PCI_VGA_MEM] = mem;
1205 memory_region_add_subregion_overlap(bus->address_space_mem,
1206 QEMU_PCI_VGA_MEM_BASE, mem, 1);
1208 assert(memory_region_size(io_lo) == QEMU_PCI_VGA_IO_LO_SIZE);
1209 pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO] = io_lo;
1210 memory_region_add_subregion_overlap(bus->address_space_io,
1211 QEMU_PCI_VGA_IO_LO_BASE, io_lo, 1);
1213 assert(memory_region_size(io_hi) == QEMU_PCI_VGA_IO_HI_SIZE);
1214 pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI] = io_hi;
1215 memory_region_add_subregion_overlap(bus->address_space_io,
1216 QEMU_PCI_VGA_IO_HI_BASE, io_hi, 1);
1217 pci_dev->has_vga = true;
1219 pci_update_vga(pci_dev);
1222 void pci_unregister_vga(PCIDevice *pci_dev)
1224 PCIBus *bus = pci_get_bus(pci_dev);
1226 if (!pci_dev->has_vga) {
1230 memory_region_del_subregion(bus->address_space_mem,
1231 pci_dev->vga_regions[QEMU_PCI_VGA_MEM]);
1232 memory_region_del_subregion(bus->address_space_io,
1233 pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO]);
1234 memory_region_del_subregion(bus->address_space_io,
1235 pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI]);
1236 pci_dev->has_vga = false;
1239 pcibus_t pci_get_bar_addr(PCIDevice *pci_dev, int region_num)
1241 return pci_dev->io_regions[region_num].addr;
1244 static pcibus_t pci_bar_address(PCIDevice *d,
1245 int reg, uint8_t type, pcibus_t size)
1247 pcibus_t new_addr, last_addr;
1248 int bar = pci_bar(d, reg);
1249 uint16_t cmd = pci_get_word(d->config + PCI_COMMAND);
1250 Object *machine = qdev_get_machine();
1251 ObjectClass *oc = object_get_class(machine);
1252 MachineClass *mc = MACHINE_CLASS(oc);
1253 bool allow_0_address = mc->pci_allow_0_address;
1255 if (type & PCI_BASE_ADDRESS_SPACE_IO) {
1256 if (!(cmd & PCI_COMMAND_IO)) {
1257 return PCI_BAR_UNMAPPED;
1259 new_addr = pci_get_long(d->config + bar) & ~(size - 1);
1260 last_addr = new_addr + size - 1;
1261 /* Check if 32 bit BAR wraps around explicitly.
1262 * TODO: make priorities correct and remove this work around.
1264 if (last_addr <= new_addr || last_addr >= UINT32_MAX ||
1265 (!allow_0_address && new_addr == 0)) {
1266 return PCI_BAR_UNMAPPED;
1271 if (!(cmd & PCI_COMMAND_MEMORY)) {
1272 return PCI_BAR_UNMAPPED;
1274 if (type & PCI_BASE_ADDRESS_MEM_TYPE_64) {
1275 new_addr = pci_get_quad(d->config + bar);
1277 new_addr = pci_get_long(d->config + bar);
1279 /* the ROM slot has a specific enable bit */
1280 if (reg == PCI_ROM_SLOT && !(new_addr & PCI_ROM_ADDRESS_ENABLE)) {
1281 return PCI_BAR_UNMAPPED;
1283 new_addr &= ~(size - 1);
1284 last_addr = new_addr + size - 1;
1285 /* NOTE: we do not support wrapping */
1286 /* XXX: as we cannot support really dynamic
1287 mappings, we handle specific values as invalid
1289 if (last_addr <= new_addr || last_addr == PCI_BAR_UNMAPPED ||
1290 (!allow_0_address && new_addr == 0)) {
1291 return PCI_BAR_UNMAPPED;
1294 /* Now pcibus_t is 64bit.
1295 * Check if 32 bit BAR wraps around explicitly.
1296 * Without this, PC ide doesn't work well.
1297 * TODO: remove this work around.
1299 if (!(type & PCI_BASE_ADDRESS_MEM_TYPE_64) && last_addr >= UINT32_MAX) {
1300 return PCI_BAR_UNMAPPED;
1304 * OS is allowed to set BAR beyond its addressable
1305 * bits. For example, 32 bit OS can set 64bit bar
1306 * to >4G. Check it. TODO: we might need to support
1307 * it in the future for e.g. PAE.
1309 if (last_addr >= HWADDR_MAX) {
1310 return PCI_BAR_UNMAPPED;
1316 static void pci_update_mappings(PCIDevice *d)
1322 for(i = 0; i < PCI_NUM_REGIONS; i++) {
1323 r = &d->io_regions[i];
1325 /* this region isn't registered */
1329 new_addr = pci_bar_address(d, i, r->type, r->size);
1331 /* This bar isn't changed */
1332 if (new_addr == r->addr)
1335 /* now do the real mapping */
1336 if (r->addr != PCI_BAR_UNMAPPED) {
1337 trace_pci_update_mappings_del(d, pci_dev_bus_num(d),
1340 i, r->addr, r->size);
1341 memory_region_del_subregion(r->address_space, r->memory);
1344 if (r->addr != PCI_BAR_UNMAPPED) {
1345 trace_pci_update_mappings_add(d, pci_dev_bus_num(d),
1348 i, r->addr, r->size);
1349 memory_region_add_subregion_overlap(r->address_space,
1350 r->addr, r->memory, 1);
1357 static inline int pci_irq_disabled(PCIDevice *d)
1359 return pci_get_word(d->config + PCI_COMMAND) & PCI_COMMAND_INTX_DISABLE;
1362 /* Called after interrupt disabled field update in config space,
1363 * assert/deassert interrupts if necessary.
1364 * Gets original interrupt disable bit value (before update). */
1365 static void pci_update_irq_disabled(PCIDevice *d, int was_irq_disabled)
1367 int i, disabled = pci_irq_disabled(d);
1368 if (disabled == was_irq_disabled)
1370 for (i = 0; i < PCI_NUM_PINS; ++i) {
1371 int state = pci_irq_state(d, i);
1372 pci_change_irq_level(d, i, disabled ? -state : state);
1376 uint32_t pci_default_read_config(PCIDevice *d,
1377 uint32_t address, int len)
1381 if (pci_is_express_downstream_port(d) &&
1382 ranges_overlap(address, len, d->exp.exp_cap + PCI_EXP_LNKSTA, 2)) {
1383 pcie_sync_bridge_lnk(d);
1385 memcpy(&val, d->config + address, len);
1386 return le32_to_cpu(val);
1389 void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val_in, int l)
1391 int i, was_irq_disabled = pci_irq_disabled(d);
1392 uint32_t val = val_in;
1394 for (i = 0; i < l; val >>= 8, ++i) {
1395 uint8_t wmask = d->wmask[addr + i];
1396 uint8_t w1cmask = d->w1cmask[addr + i];
1397 assert(!(wmask & w1cmask));
1398 d->config[addr + i] = (d->config[addr + i] & ~wmask) | (val & wmask);
1399 d->config[addr + i] &= ~(val & w1cmask); /* W1C: Write 1 to Clear */
1401 if (ranges_overlap(addr, l, PCI_BASE_ADDRESS_0, 24) ||
1402 ranges_overlap(addr, l, PCI_ROM_ADDRESS, 4) ||
1403 ranges_overlap(addr, l, PCI_ROM_ADDRESS1, 4) ||
1404 range_covers_byte(addr, l, PCI_COMMAND))
1405 pci_update_mappings(d);
1407 if (range_covers_byte(addr, l, PCI_COMMAND)) {
1408 pci_update_irq_disabled(d, was_irq_disabled);
1409 memory_region_set_enabled(&d->bus_master_enable_region,
1410 pci_get_word(d->config + PCI_COMMAND)
1411 & PCI_COMMAND_MASTER);
1414 msi_write_config(d, addr, val_in, l);
1415 msix_write_config(d, addr, val_in, l);
1418 /***********************************************************/
1419 /* generic PCI irq support */
1421 /* 0 <= irq_num <= 3. level must be 0 or 1 */
1422 static void pci_irq_handler(void *opaque, int irq_num, int level)
1424 PCIDevice *pci_dev = opaque;
1427 change = level - pci_irq_state(pci_dev, irq_num);
1431 pci_set_irq_state(pci_dev, irq_num, level);
1432 pci_update_irq_status(pci_dev);
1433 if (pci_irq_disabled(pci_dev))
1435 pci_change_irq_level(pci_dev, irq_num, change);
1438 static inline int pci_intx(PCIDevice *pci_dev)
1440 return pci_get_byte(pci_dev->config + PCI_INTERRUPT_PIN) - 1;
1443 qemu_irq pci_allocate_irq(PCIDevice *pci_dev)
1445 int intx = pci_intx(pci_dev);
1447 return qemu_allocate_irq(pci_irq_handler, pci_dev, intx);
1450 void pci_set_irq(PCIDevice *pci_dev, int level)
1452 int intx = pci_intx(pci_dev);
1453 pci_irq_handler(pci_dev, intx, level);
1456 /* Special hooks used by device assignment */
1457 void pci_bus_set_route_irq_fn(PCIBus *bus, pci_route_irq_fn route_intx_to_irq)
1459 assert(pci_bus_is_root(bus));
1460 bus->route_intx_to_irq = route_intx_to_irq;
1463 PCIINTxRoute pci_device_route_intx_to_irq(PCIDevice *dev, int pin)
1468 bus = pci_get_bus(dev);
1469 pin = bus->map_irq(dev, pin);
1470 dev = bus->parent_dev;
1473 if (!bus->route_intx_to_irq) {
1474 error_report("PCI: Bug - unimplemented PCI INTx routing (%s)",
1475 object_get_typename(OBJECT(bus->qbus.parent)));
1476 return (PCIINTxRoute) { PCI_INTX_DISABLED, -1 };
1479 return bus->route_intx_to_irq(bus->irq_opaque, pin);
1482 bool pci_intx_route_changed(PCIINTxRoute *old, PCIINTxRoute *new)
1484 return old->mode != new->mode || old->irq != new->irq;
1487 void pci_bus_fire_intx_routing_notifier(PCIBus *bus)
1493 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) {
1494 dev = bus->devices[i];
1495 if (dev && dev->intx_routing_notifier) {
1496 dev->intx_routing_notifier(dev);
1500 QLIST_FOREACH(sec, &bus->child, sibling) {
1501 pci_bus_fire_intx_routing_notifier(sec);
1505 void pci_device_set_intx_routing_notifier(PCIDevice *dev,
1506 PCIINTxRoutingNotifier notifier)
1508 dev->intx_routing_notifier = notifier;
1512 * PCI-to-PCI bridge specification
1513 * 9.1: Interrupt routing. Table 9-1
1515 * the PCI Express Base Specification, Revision 2.1
1516 * 2.2.8.1: INTx interrutp signaling - Rules
1517 * the Implementation Note
1521 * 0 <= pin <= 3 0 = INTA, 1 = INTB, 2 = INTC, 3 = INTD
1522 * 0-origin unlike PCI interrupt pin register.
1524 int pci_swizzle_map_irq_fn(PCIDevice *pci_dev, int pin)
1526 return pci_swizzle(PCI_SLOT(pci_dev->devfn), pin);
1529 /***********************************************************/
1530 /* monitor info on PCI */
1535 const char *fw_name;
1536 uint16_t fw_ign_bits;
1539 static const pci_class_desc pci_class_descriptions[] =
1541 { 0x0001, "VGA controller", "display"},
1542 { 0x0100, "SCSI controller", "scsi"},
1543 { 0x0101, "IDE controller", "ide"},
1544 { 0x0102, "Floppy controller", "fdc"},
1545 { 0x0103, "IPI controller", "ipi"},
1546 { 0x0104, "RAID controller", "raid"},
1547 { 0x0106, "SATA controller"},
1548 { 0x0107, "SAS controller"},
1549 { 0x0180, "Storage controller"},
1550 { 0x0200, "Ethernet controller", "ethernet"},
1551 { 0x0201, "Token Ring controller", "token-ring"},
1552 { 0x0202, "FDDI controller", "fddi"},
1553 { 0x0203, "ATM controller", "atm"},
1554 { 0x0280, "Network controller"},
1555 { 0x0300, "VGA controller", "display", 0x00ff},
1556 { 0x0301, "XGA controller"},
1557 { 0x0302, "3D controller"},
1558 { 0x0380, "Display controller"},
1559 { 0x0400, "Video controller", "video"},
1560 { 0x0401, "Audio controller", "sound"},
1562 { 0x0403, "Audio controller", "sound"},
1563 { 0x0480, "Multimedia controller"},
1564 { 0x0500, "RAM controller", "memory"},
1565 { 0x0501, "Flash controller", "flash"},
1566 { 0x0580, "Memory controller"},
1567 { 0x0600, "Host bridge", "host"},
1568 { 0x0601, "ISA bridge", "isa"},
1569 { 0x0602, "EISA bridge", "eisa"},
1570 { 0x0603, "MC bridge", "mca"},
1571 { 0x0604, "PCI bridge", "pci-bridge"},
1572 { 0x0605, "PCMCIA bridge", "pcmcia"},
1573 { 0x0606, "NUBUS bridge", "nubus"},
1574 { 0x0607, "CARDBUS bridge", "cardbus"},
1575 { 0x0608, "RACEWAY bridge"},
1576 { 0x0680, "Bridge"},
1577 { 0x0700, "Serial port", "serial"},
1578 { 0x0701, "Parallel port", "parallel"},
1579 { 0x0800, "Interrupt controller", "interrupt-controller"},
1580 { 0x0801, "DMA controller", "dma-controller"},
1581 { 0x0802, "Timer", "timer"},
1582 { 0x0803, "RTC", "rtc"},
1583 { 0x0900, "Keyboard", "keyboard"},
1584 { 0x0901, "Pen", "pen"},
1585 { 0x0902, "Mouse", "mouse"},
1586 { 0x0A00, "Dock station", "dock", 0x00ff},
1587 { 0x0B00, "i386 cpu", "cpu", 0x00ff},
1588 { 0x0c00, "Fireware contorller", "fireware"},
1589 { 0x0c01, "Access bus controller", "access-bus"},
1590 { 0x0c02, "SSA controller", "ssa"},
1591 { 0x0c03, "USB controller", "usb"},
1592 { 0x0c04, "Fibre channel controller", "fibre-channel"},
1597 static void pci_for_each_device_under_bus_reverse(PCIBus *bus,
1598 void (*fn)(PCIBus *b,
1606 for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) {
1607 d = bus->devices[ARRAY_SIZE(bus->devices) - 1 - devfn];
1614 void pci_for_each_device_reverse(PCIBus *bus, int bus_num,
1615 void (*fn)(PCIBus *b, PCIDevice *d, void *opaque),
1618 bus = pci_find_bus_nr(bus, bus_num);
1621 pci_for_each_device_under_bus_reverse(bus, fn, opaque);
1625 static void pci_for_each_device_under_bus(PCIBus *bus,
1626 void (*fn)(PCIBus *b, PCIDevice *d,
1633 for(devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) {
1634 d = bus->devices[devfn];
1641 void pci_for_each_device(PCIBus *bus, int bus_num,
1642 void (*fn)(PCIBus *b, PCIDevice *d, void *opaque),
1645 bus = pci_find_bus_nr(bus, bus_num);
1648 pci_for_each_device_under_bus(bus, fn, opaque);
1652 static const pci_class_desc *get_class_desc(int class)
1654 const pci_class_desc *desc;
1656 desc = pci_class_descriptions;
1657 while (desc->desc && class != desc->class) {
1664 static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num);
1666 static PciMemoryRegionList *qmp_query_pci_regions(const PCIDevice *dev)
1668 PciMemoryRegionList *head = NULL, *cur_item = NULL;
1671 for (i = 0; i < PCI_NUM_REGIONS; i++) {
1672 const PCIIORegion *r = &dev->io_regions[i];
1673 PciMemoryRegionList *region;
1679 region = g_malloc0(sizeof(*region));
1680 region->value = g_malloc0(sizeof(*region->value));
1682 if (r->type & PCI_BASE_ADDRESS_SPACE_IO) {
1683 region->value->type = g_strdup("io");
1685 region->value->type = g_strdup("memory");
1686 region->value->has_prefetch = true;
1687 region->value->prefetch = !!(r->type & PCI_BASE_ADDRESS_MEM_PREFETCH);
1688 region->value->has_mem_type_64 = true;
1689 region->value->mem_type_64 = !!(r->type & PCI_BASE_ADDRESS_MEM_TYPE_64);
1692 region->value->bar = i;
1693 region->value->address = r->addr;
1694 region->value->size = r->size;
1696 /* XXX: waiting for the qapi to support GSList */
1698 head = cur_item = region;
1700 cur_item->next = region;
1708 static PciBridgeInfo *qmp_query_pci_bridge(PCIDevice *dev, PCIBus *bus,
1711 PciBridgeInfo *info;
1712 PciMemoryRange *range;
1714 info = g_new0(PciBridgeInfo, 1);
1716 info->bus = g_new0(PciBusInfo, 1);
1717 info->bus->number = dev->config[PCI_PRIMARY_BUS];
1718 info->bus->secondary = dev->config[PCI_SECONDARY_BUS];
1719 info->bus->subordinate = dev->config[PCI_SUBORDINATE_BUS];
1721 range = info->bus->io_range = g_new0(PciMemoryRange, 1);
1722 range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_IO);
1723 range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_IO);
1725 range = info->bus->memory_range = g_new0(PciMemoryRange, 1);
1726 range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_MEMORY);
1727 range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_MEMORY);
1729 range = info->bus->prefetchable_range = g_new0(PciMemoryRange, 1);
1730 range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
1731 range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
1733 if (dev->config[PCI_SECONDARY_BUS] != 0) {
1734 PCIBus *child_bus = pci_find_bus_nr(bus, dev->config[PCI_SECONDARY_BUS]);
1736 info->has_devices = true;
1737 info->devices = qmp_query_pci_devices(child_bus, dev->config[PCI_SECONDARY_BUS]);
1744 static PciDeviceInfo *qmp_query_pci_device(PCIDevice *dev, PCIBus *bus,
1747 const pci_class_desc *desc;
1748 PciDeviceInfo *info;
1752 info = g_new0(PciDeviceInfo, 1);
1753 info->bus = bus_num;
1754 info->slot = PCI_SLOT(dev->devfn);
1755 info->function = PCI_FUNC(dev->devfn);
1757 info->class_info = g_new0(PciDeviceClass, 1);
1758 class = pci_get_word(dev->config + PCI_CLASS_DEVICE);
1759 info->class_info->q_class = class;
1760 desc = get_class_desc(class);
1762 info->class_info->has_desc = true;
1763 info->class_info->desc = g_strdup(desc->desc);
1766 info->id = g_new0(PciDeviceId, 1);
1767 info->id->vendor = pci_get_word(dev->config + PCI_VENDOR_ID);
1768 info->id->device = pci_get_word(dev->config + PCI_DEVICE_ID);
1769 info->regions = qmp_query_pci_regions(dev);
1770 info->qdev_id = g_strdup(dev->qdev.id ? dev->qdev.id : "");
1772 if (dev->config[PCI_INTERRUPT_PIN] != 0) {
1773 info->has_irq = true;
1774 info->irq = dev->config[PCI_INTERRUPT_LINE];
1777 type = dev->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION;
1778 if (type == PCI_HEADER_TYPE_BRIDGE) {
1779 info->has_pci_bridge = true;
1780 info->pci_bridge = qmp_query_pci_bridge(dev, bus, bus_num);
1781 } else if (type == PCI_HEADER_TYPE_NORMAL) {
1782 info->id->has_subsystem = info->id->has_subsystem_vendor = true;
1783 info->id->subsystem = pci_get_word(dev->config + PCI_SUBSYSTEM_ID);
1784 info->id->subsystem_vendor =
1785 pci_get_word(dev->config + PCI_SUBSYSTEM_VENDOR_ID);
1786 } else if (type == PCI_HEADER_TYPE_CARDBUS) {
1787 info->id->has_subsystem = info->id->has_subsystem_vendor = true;
1788 info->id->subsystem = pci_get_word(dev->config + PCI_CB_SUBSYSTEM_ID);
1789 info->id->subsystem_vendor =
1790 pci_get_word(dev->config + PCI_CB_SUBSYSTEM_VENDOR_ID);
1796 static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num)
1798 PciDeviceInfoList *info, *head = NULL, *cur_item = NULL;
1802 for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) {
1803 dev = bus->devices[devfn];
1805 info = g_malloc0(sizeof(*info));
1806 info->value = qmp_query_pci_device(dev, bus, bus_num);
1808 /* XXX: waiting for the qapi to support GSList */
1810 head = cur_item = info;
1812 cur_item->next = info;
1821 static PciInfo *qmp_query_pci_bus(PCIBus *bus, int bus_num)
1823 PciInfo *info = NULL;
1825 bus = pci_find_bus_nr(bus, bus_num);
1827 info = g_malloc0(sizeof(*info));
1828 info->bus = bus_num;
1829 info->devices = qmp_query_pci_devices(bus, bus_num);
1835 PciInfoList *qmp_query_pci(Error **errp)
1837 PciInfoList *info, *head = NULL, *cur_item = NULL;
1838 PCIHostState *host_bridge;
1840 QLIST_FOREACH(host_bridge, &pci_host_bridges, next) {
1841 info = g_malloc0(sizeof(*info));
1842 info->value = qmp_query_pci_bus(host_bridge->bus,
1843 pci_bus_num(host_bridge->bus));
1845 /* XXX: waiting for the qapi to support GSList */
1847 head = cur_item = info;
1849 cur_item->next = info;
1857 /* Initialize a PCI NIC. */
1858 PCIDevice *pci_nic_init_nofail(NICInfo *nd, PCIBus *rootbus,
1859 const char *default_model,
1860 const char *default_devaddr)
1862 const char *devaddr = nd->devaddr ? nd->devaddr : default_devaddr;
1864 GPtrArray *pci_nic_models;
1873 if (nd->model && !strcmp(nd->model, "virtio")) {
1875 nd->model = g_strdup("virtio-net-pci");
1878 list = object_class_get_list_sorted(TYPE_PCI_DEVICE, false);
1879 pci_nic_models = g_ptr_array_new();
1881 DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, list->data,
1884 if (test_bit(DEVICE_CATEGORY_NETWORK, dc->categories) &&
1885 dc->user_creatable) {
1886 const char *name = object_class_get_name(list->data);
1887 g_ptr_array_add(pci_nic_models, (gpointer)name);
1890 g_slist_free_1(list);
1893 g_ptr_array_add(pci_nic_models, NULL);
1895 if (qemu_show_nic_models(nd->model, (const char **)pci_nic_models->pdata)) {
1899 i = qemu_find_nic_model(nd, (const char **)pci_nic_models->pdata,
1906 error_report("No primary PCI bus");
1910 assert(!rootbus->parent_dev);
1916 if (pci_parse_devaddr(devaddr, &dom, &busnr, &slot, NULL) < 0) {
1917 error_report("Invalid PCI device address %s for device %s",
1918 devaddr, nd->model);
1923 error_report("No support for non-zero PCI domains");
1927 devfn = PCI_DEVFN(slot, 0);
1930 bus = pci_find_bus_nr(rootbus, busnr);
1932 error_report("Invalid PCI device address %s for device %s",
1933 devaddr, nd->model);
1937 pci_dev = pci_create(bus, devfn, nd->model);
1938 dev = &pci_dev->qdev;
1939 qdev_set_nic_properties(dev, nd);
1940 qdev_init_nofail(dev);
1941 g_ptr_array_free(pci_nic_models, true);
1945 PCIDevice *pci_vga_init(PCIBus *bus)
1947 switch (vga_interface_type) {
1949 return pci_create_simple(bus, -1, "cirrus-vga");
1951 return pci_create_simple(bus, -1, "qxl-vga");
1953 return pci_create_simple(bus, -1, "VGA");
1955 return pci_create_simple(bus, -1, "vmware-svga");
1957 return pci_create_simple(bus, -1, "virtio-vga");
1959 default: /* Other non-PCI types. Checking for unsupported types is already
1965 /* Whether a given bus number is in range of the secondary
1966 * bus of the given bridge device. */
1967 static bool pci_secondary_bus_in_range(PCIDevice *dev, int bus_num)
1969 return !(pci_get_word(dev->config + PCI_BRIDGE_CONTROL) &
1970 PCI_BRIDGE_CTL_BUS_RESET) /* Don't walk the bus if it's reset. */ &&
1971 dev->config[PCI_SECONDARY_BUS] <= bus_num &&
1972 bus_num <= dev->config[PCI_SUBORDINATE_BUS];
1975 /* Whether a given bus number is in a range of a root bus */
1976 static bool pci_root_bus_in_range(PCIBus *bus, int bus_num)
1980 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) {
1981 PCIDevice *dev = bus->devices[i];
1983 if (dev && PCI_DEVICE_GET_CLASS(dev)->is_bridge) {
1984 if (pci_secondary_bus_in_range(dev, bus_num)) {
1993 static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num)
2001 if (pci_bus_num(bus) == bus_num) {
2005 /* Consider all bus numbers in range for the host pci bridge. */
2006 if (!pci_bus_is_root(bus) &&
2007 !pci_secondary_bus_in_range(bus->parent_dev, bus_num)) {
2012 for (; bus; bus = sec) {
2013 QLIST_FOREACH(sec, &bus->child, sibling) {
2014 if (pci_bus_num(sec) == bus_num) {
2017 /* PXB buses assumed to be children of bus 0 */
2018 if (pci_bus_is_root(sec)) {
2019 if (pci_root_bus_in_range(sec, bus_num)) {
2023 if (pci_secondary_bus_in_range(sec->parent_dev, bus_num)) {
2033 void pci_for_each_bus_depth_first(PCIBus *bus,
2034 void *(*begin)(PCIBus *bus, void *parent_state),
2035 void (*end)(PCIBus *bus, void *state),
2046 state = begin(bus, parent_state);
2048 state = parent_state;
2051 QLIST_FOREACH(sec, &bus->child, sibling) {
2052 pci_for_each_bus_depth_first(sec, begin, end, state);
2061 PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn)
2063 bus = pci_find_bus_nr(bus, bus_num);
2068 return bus->devices[devfn];
2071 static void pci_qdev_realize(DeviceState *qdev, Error **errp)
2073 PCIDevice *pci_dev = (PCIDevice *)qdev;
2074 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev);
2075 ObjectClass *klass = OBJECT_CLASS(pc);
2076 Error *local_err = NULL;
2077 bool is_default_rom;
2079 /* initialize cap_present for pci_is_express() and pci_config_size(),
2080 * Note that hybrid PCIs are not set automatically and need to manage
2081 * QEMU_PCI_CAP_EXPRESS manually */
2082 if (object_class_dynamic_cast(klass, INTERFACE_PCIE_DEVICE) &&
2083 !object_class_dynamic_cast(klass, INTERFACE_CONVENTIONAL_PCI_DEVICE)) {
2084 pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS;
2087 pci_dev = do_pci_register_device(pci_dev,
2088 object_get_typename(OBJECT(qdev)),
2089 pci_dev->devfn, errp);
2090 if (pci_dev == NULL)
2094 pc->realize(pci_dev, &local_err);
2096 error_propagate(errp, local_err);
2097 do_pci_unregister_device(pci_dev);
2103 is_default_rom = false;
2104 if (pci_dev->romfile == NULL && pc->romfile != NULL) {
2105 pci_dev->romfile = g_strdup(pc->romfile);
2106 is_default_rom = true;
2109 pci_add_option_rom(pci_dev, is_default_rom, &local_err);
2111 error_propagate(errp, local_err);
2112 pci_qdev_unrealize(DEVICE(pci_dev), NULL);
2117 PCIDevice *pci_create_multifunction(PCIBus *bus, int devfn, bool multifunction,
2122 dev = qdev_create(&bus->qbus, name);
2123 qdev_prop_set_int32(dev, "addr", devfn);
2124 qdev_prop_set_bit(dev, "multifunction", multifunction);
2125 return PCI_DEVICE(dev);
2128 PCIDevice *pci_create_simple_multifunction(PCIBus *bus, int devfn,
2132 PCIDevice *dev = pci_create_multifunction(bus, devfn, multifunction, name);
2133 qdev_init_nofail(&dev->qdev);
2137 PCIDevice *pci_create(PCIBus *bus, int devfn, const char *name)
2139 return pci_create_multifunction(bus, devfn, false, name);
2142 PCIDevice *pci_create_simple(PCIBus *bus, int devfn, const char *name)
2144 return pci_create_simple_multifunction(bus, devfn, false, name);
2147 static uint8_t pci_find_space(PCIDevice *pdev, uint8_t size)
2149 int offset = PCI_CONFIG_HEADER_SIZE;
2151 for (i = PCI_CONFIG_HEADER_SIZE; i < PCI_CONFIG_SPACE_SIZE; ++i) {
2154 else if (i - offset + 1 == size)
2160 static uint8_t pci_find_capability_list(PCIDevice *pdev, uint8_t cap_id,
2165 if (!(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST))
2168 for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]);
2169 prev = next + PCI_CAP_LIST_NEXT)
2170 if (pdev->config[next + PCI_CAP_LIST_ID] == cap_id)
2178 static uint8_t pci_find_capability_at_offset(PCIDevice *pdev, uint8_t offset)
2180 uint8_t next, prev, found = 0;
2182 if (!(pdev->used[offset])) {
2186 assert(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST);
2188 for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]);
2189 prev = next + PCI_CAP_LIST_NEXT) {
2190 if (next <= offset && next > found) {
2197 /* Patch the PCI vendor and device ids in a PCI rom image if necessary.
2198 This is needed for an option rom which is used for more than one device. */
2199 static void pci_patch_ids(PCIDevice *pdev, uint8_t *ptr, int size)
2203 uint16_t rom_vendor_id;
2204 uint16_t rom_device_id;
2206 uint16_t pcir_offset;
2209 /* Words in rom data are little endian (like in PCI configuration),
2210 so they can be read / written with pci_get_word / pci_set_word. */
2212 /* Only a valid rom will be patched. */
2213 rom_magic = pci_get_word(ptr);
2214 if (rom_magic != 0xaa55) {
2215 PCI_DPRINTF("Bad ROM magic %04x\n", rom_magic);
2218 pcir_offset = pci_get_word(ptr + 0x18);
2219 if (pcir_offset + 8 >= size || memcmp(ptr + pcir_offset, "PCIR", 4)) {
2220 PCI_DPRINTF("Bad PCIR offset 0x%x or signature\n", pcir_offset);
2224 vendor_id = pci_get_word(pdev->config + PCI_VENDOR_ID);
2225 device_id = pci_get_word(pdev->config + PCI_DEVICE_ID);
2226 rom_vendor_id = pci_get_word(ptr + pcir_offset + 4);
2227 rom_device_id = pci_get_word(ptr + pcir_offset + 6);
2229 PCI_DPRINTF("%s: ROM id %04x%04x / PCI id %04x%04x\n", pdev->romfile,
2230 vendor_id, device_id, rom_vendor_id, rom_device_id);
2234 if (vendor_id != rom_vendor_id) {
2235 /* Patch vendor id and checksum (at offset 6 for etherboot roms). */
2236 checksum += (uint8_t)rom_vendor_id + (uint8_t)(rom_vendor_id >> 8);
2237 checksum -= (uint8_t)vendor_id + (uint8_t)(vendor_id >> 8);
2238 PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum);
2240 pci_set_word(ptr + pcir_offset + 4, vendor_id);
2243 if (device_id != rom_device_id) {
2244 /* Patch device id and checksum (at offset 6 for etherboot roms). */
2245 checksum += (uint8_t)rom_device_id + (uint8_t)(rom_device_id >> 8);
2246 checksum -= (uint8_t)device_id + (uint8_t)(device_id >> 8);
2247 PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum);
2249 pci_set_word(ptr + pcir_offset + 6, device_id);
2253 /* Add an option rom for the device */
2254 static void pci_add_option_rom(PCIDevice *pdev, bool is_default_rom,
2261 const VMStateDescription *vmsd;
2265 if (strlen(pdev->romfile) == 0)
2268 if (!pdev->rom_bar) {
2270 * Load rom via fw_cfg instead of creating a rom bar,
2271 * for 0.11 compatibility.
2273 int class = pci_get_word(pdev->config + PCI_CLASS_DEVICE);
2276 * Hot-plugged devices can't use the option ROM
2277 * if the rom bar is disabled.
2279 if (DEVICE(pdev)->hotplugged) {
2280 error_setg(errp, "Hot-plugged device without ROM bar"
2281 " can't have an option ROM");
2285 if (class == 0x0300) {
2286 rom_add_vga(pdev->romfile);
2288 rom_add_option(pdev->romfile, -1);
2293 path = qemu_find_file(QEMU_FILE_TYPE_BIOS, pdev->romfile);
2295 path = g_strdup(pdev->romfile);
2298 size = get_image_size(path);
2300 error_setg(errp, "failed to find romfile \"%s\"", pdev->romfile);
2303 } else if (size == 0) {
2304 error_setg(errp, "romfile \"%s\" is empty", pdev->romfile);
2308 size = pow2ceil(size);
2310 vmsd = qdev_get_vmsd(DEVICE(pdev));
2313 snprintf(name, sizeof(name), "%s.rom", vmsd->name);
2315 snprintf(name, sizeof(name), "%s.rom", object_get_typename(OBJECT(pdev)));
2317 pdev->has_rom = true;
2318 memory_region_init_rom(&pdev->rom, OBJECT(pdev), name, size, &error_fatal);
2319 ptr = memory_region_get_ram_ptr(&pdev->rom);
2320 if (load_image_size(path, ptr, size) < 0) {
2321 error_setg(errp, "failed to load romfile \"%s\"", pdev->romfile);
2327 if (is_default_rom) {
2328 /* Only the default rom images will be patched (if needed). */
2329 pci_patch_ids(pdev, ptr, size);
2332 pci_register_bar(pdev, PCI_ROM_SLOT, 0, &pdev->rom);
2335 static void pci_del_option_rom(PCIDevice *pdev)
2340 vmstate_unregister_ram(&pdev->rom, &pdev->qdev);
2341 pdev->has_rom = false;
2345 * On success, pci_add_capability() returns a positive value
2346 * that the offset of the pci capability.
2347 * On failure, it sets an error and returns a negative error
2350 int pci_add_capability(PCIDevice *pdev, uint8_t cap_id,
2351 uint8_t offset, uint8_t size,
2355 int i, overlapping_cap;
2358 offset = pci_find_space(pdev, size);
2359 /* out of PCI config space is programming error */
2362 /* Verify that capabilities don't overlap. Note: device assignment
2363 * depends on this check to verify that the device is not broken.
2364 * Should never trigger for emulated devices, but it's helpful
2365 * for debugging these. */
2366 for (i = offset; i < offset + size; i++) {
2367 overlapping_cap = pci_find_capability_at_offset(pdev, i);
2368 if (overlapping_cap) {
2369 error_setg(errp, "%s:%02x:%02x.%x "
2370 "Attempt to add PCI capability %x at offset "
2371 "%x overlaps existing capability %x at offset %x",
2372 pci_root_bus_path(pdev), pci_dev_bus_num(pdev),
2373 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn),
2374 cap_id, offset, overlapping_cap, i);
2380 config = pdev->config + offset;
2381 config[PCI_CAP_LIST_ID] = cap_id;
2382 config[PCI_CAP_LIST_NEXT] = pdev->config[PCI_CAPABILITY_LIST];
2383 pdev->config[PCI_CAPABILITY_LIST] = offset;
2384 pdev->config[PCI_STATUS] |= PCI_STATUS_CAP_LIST;
2385 memset(pdev->used + offset, 0xFF, QEMU_ALIGN_UP(size, 4));
2386 /* Make capability read-only by default */
2387 memset(pdev->wmask + offset, 0, size);
2388 /* Check capability by default */
2389 memset(pdev->cmask + offset, 0xFF, size);
2393 /* Unlink capability from the pci config space. */
2394 void pci_del_capability(PCIDevice *pdev, uint8_t cap_id, uint8_t size)
2396 uint8_t prev, offset = pci_find_capability_list(pdev, cap_id, &prev);
2399 pdev->config[prev] = pdev->config[offset + PCI_CAP_LIST_NEXT];
2400 /* Make capability writable again */
2401 memset(pdev->wmask + offset, 0xff, size);
2402 memset(pdev->w1cmask + offset, 0, size);
2403 /* Clear cmask as device-specific registers can't be checked */
2404 memset(pdev->cmask + offset, 0, size);
2405 memset(pdev->used + offset, 0, QEMU_ALIGN_UP(size, 4));
2407 if (!pdev->config[PCI_CAPABILITY_LIST])
2408 pdev->config[PCI_STATUS] &= ~PCI_STATUS_CAP_LIST;
2411 uint8_t pci_find_capability(PCIDevice *pdev, uint8_t cap_id)
2413 return pci_find_capability_list(pdev, cap_id, NULL);
2416 static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent)
2418 PCIDevice *d = (PCIDevice *)dev;
2419 const pci_class_desc *desc;
2424 class = pci_get_word(d->config + PCI_CLASS_DEVICE);
2425 desc = pci_class_descriptions;
2426 while (desc->desc && class != desc->class)
2429 snprintf(ctxt, sizeof(ctxt), "%s", desc->desc);
2431 snprintf(ctxt, sizeof(ctxt), "Class %04x", class);
2434 monitor_printf(mon, "%*sclass %s, addr %02x:%02x.%x, "
2435 "pci id %04x:%04x (sub %04x:%04x)\n",
2436 indent, "", ctxt, pci_dev_bus_num(d),
2437 PCI_SLOT(d->devfn), PCI_FUNC(d->devfn),
2438 pci_get_word(d->config + PCI_VENDOR_ID),
2439 pci_get_word(d->config + PCI_DEVICE_ID),
2440 pci_get_word(d->config + PCI_SUBSYSTEM_VENDOR_ID),
2441 pci_get_word(d->config + PCI_SUBSYSTEM_ID));
2442 for (i = 0; i < PCI_NUM_REGIONS; i++) {
2443 r = &d->io_regions[i];
2446 monitor_printf(mon, "%*sbar %d: %s at 0x%"FMT_PCIBUS
2447 " [0x%"FMT_PCIBUS"]\n",
2449 i, r->type & PCI_BASE_ADDRESS_SPACE_IO ? "i/o" : "mem",
2450 r->addr, r->addr + r->size - 1);
2454 static char *pci_dev_fw_name(DeviceState *dev, char *buf, int len)
2456 PCIDevice *d = (PCIDevice *)dev;
2457 const char *name = NULL;
2458 const pci_class_desc *desc = pci_class_descriptions;
2459 int class = pci_get_word(d->config + PCI_CLASS_DEVICE);
2461 while (desc->desc &&
2462 (class & ~desc->fw_ign_bits) !=
2463 (desc->class & ~desc->fw_ign_bits)) {
2468 name = desc->fw_name;
2472 pstrcpy(buf, len, name);
2474 snprintf(buf, len, "pci%04x,%04x",
2475 pci_get_word(d->config + PCI_VENDOR_ID),
2476 pci_get_word(d->config + PCI_DEVICE_ID));
2482 static char *pcibus_get_fw_dev_path(DeviceState *dev)
2484 PCIDevice *d = (PCIDevice *)dev;
2485 char path[50], name[33];
2488 off = snprintf(path, sizeof(path), "%s@%x",
2489 pci_dev_fw_name(dev, name, sizeof name),
2490 PCI_SLOT(d->devfn));
2491 if (PCI_FUNC(d->devfn))
2492 snprintf(path + off, sizeof(path) + off, ",%x", PCI_FUNC(d->devfn));
2493 return g_strdup(path);
2496 static char *pcibus_get_dev_path(DeviceState *dev)
2498 PCIDevice *d = container_of(dev, PCIDevice, qdev);
2501 /* Path format: Domain:00:Slot.Function:Slot.Function....:Slot.Function.
2502 * 00 is added here to make this format compatible with
2503 * domain:Bus:Slot.Func for systems without nested PCI bridges.
2504 * Slot.Function list specifies the slot and function numbers for all
2505 * devices on the path from root to the specific device. */
2506 const char *root_bus_path;
2508 char slot[] = ":SS.F";
2509 int slot_len = sizeof slot - 1 /* For '\0' */;
2514 root_bus_path = pci_root_bus_path(d);
2515 root_bus_len = strlen(root_bus_path);
2517 /* Calculate # of slots on path between device and root. */;
2519 for (t = d; t; t = pci_get_bus(t)->parent_dev) {
2523 path_len = root_bus_len + slot_len * slot_depth;
2525 /* Allocate memory, fill in the terminating null byte. */
2526 path = g_malloc(path_len + 1 /* For '\0' */);
2527 path[path_len] = '\0';
2529 memcpy(path, root_bus_path, root_bus_len);
2531 /* Fill in slot numbers. We walk up from device to root, so need to print
2532 * them in the reverse order, last to first. */
2533 p = path + path_len;
2534 for (t = d; t; t = pci_get_bus(t)->parent_dev) {
2536 s = snprintf(slot, sizeof slot, ":%02x.%x",
2537 PCI_SLOT(t->devfn), PCI_FUNC(t->devfn));
2538 assert(s == slot_len);
2539 memcpy(p, slot, slot_len);
2545 static int pci_qdev_find_recursive(PCIBus *bus,
2546 const char *id, PCIDevice **pdev)
2548 DeviceState *qdev = qdev_find_recursive(&bus->qbus, id);
2553 /* roughly check if given qdev is pci device */
2554 if (object_dynamic_cast(OBJECT(qdev), TYPE_PCI_DEVICE)) {
2555 *pdev = PCI_DEVICE(qdev);
2561 int pci_qdev_find_device(const char *id, PCIDevice **pdev)
2563 PCIHostState *host_bridge;
2566 QLIST_FOREACH(host_bridge, &pci_host_bridges, next) {
2567 int tmp = pci_qdev_find_recursive(host_bridge->bus, id, pdev);
2572 if (tmp != -ENODEV) {
2580 MemoryRegion *pci_address_space(PCIDevice *dev)
2582 return pci_get_bus(dev)->address_space_mem;
2585 MemoryRegion *pci_address_space_io(PCIDevice *dev)
2587 return pci_get_bus(dev)->address_space_io;
2590 static void pci_device_class_init(ObjectClass *klass, void *data)
2592 DeviceClass *k = DEVICE_CLASS(klass);
2594 k->realize = pci_qdev_realize;
2595 k->unrealize = pci_qdev_unrealize;
2596 k->bus_type = TYPE_PCI_BUS;
2597 k->props = pci_props;
2600 static void pci_device_class_base_init(ObjectClass *klass, void *data)
2602 if (!object_class_is_abstract(klass)) {
2603 ObjectClass *conventional =
2604 object_class_dynamic_cast(klass, INTERFACE_CONVENTIONAL_PCI_DEVICE);
2606 object_class_dynamic_cast(klass, INTERFACE_PCIE_DEVICE);
2607 assert(conventional || pcie);
2611 AddressSpace *pci_device_iommu_address_space(PCIDevice *dev)
2613 PCIBus *bus = pci_get_bus(dev);
2614 PCIBus *iommu_bus = bus;
2616 while(iommu_bus && !iommu_bus->iommu_fn && iommu_bus->parent_dev) {
2617 iommu_bus = pci_get_bus(iommu_bus->parent_dev);
2619 if (iommu_bus && iommu_bus->iommu_fn) {
2620 return iommu_bus->iommu_fn(bus, iommu_bus->iommu_opaque, dev->devfn);
2622 return &address_space_memory;
2625 void pci_setup_iommu(PCIBus *bus, PCIIOMMUFunc fn, void *opaque)
2628 bus->iommu_opaque = opaque;
2631 static void pci_dev_get_w64(PCIBus *b, PCIDevice *dev, void *opaque)
2633 Range *range = opaque;
2634 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev);
2635 uint16_t cmd = pci_get_word(dev->config + PCI_COMMAND);
2638 if (!(cmd & PCI_COMMAND_MEMORY)) {
2642 if (pc->is_bridge) {
2643 pcibus_t base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
2644 pcibus_t limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
2646 base = MAX(base, 0x1ULL << 32);
2648 if (limit >= base) {
2650 range_set_bounds(&pref_range, base, limit);
2651 range_extend(range, &pref_range);
2654 for (i = 0; i < PCI_NUM_REGIONS; ++i) {
2655 PCIIORegion *r = &dev->io_regions[i];
2660 (r->type & PCI_BASE_ADDRESS_SPACE_IO) ||
2661 !(r->type & PCI_BASE_ADDRESS_MEM_TYPE_64)) {
2665 lob = pci_bar_address(dev, i, r->type, r->size);
2666 upb = lob + r->size - 1;
2667 if (lob == PCI_BAR_UNMAPPED) {
2671 lob = MAX(lob, 0x1ULL << 32);
2674 range_set_bounds(®ion_range, lob, upb);
2675 range_extend(range, ®ion_range);
2680 void pci_bus_get_w64_range(PCIBus *bus, Range *range)
2682 range_make_empty(range);
2683 pci_for_each_device_under_bus(bus, pci_dev_get_w64, range);
2686 static bool pcie_has_upstream_port(PCIDevice *dev)
2688 PCIDevice *parent_dev = pci_bridge_get_device(pci_get_bus(dev));
2690 /* Device associated with an upstream port.
2691 * As there are several types of these, it's easier to check the
2692 * parent device: upstream ports are always connected to
2693 * root or downstream ports.
2695 return parent_dev &&
2696 pci_is_express(parent_dev) &&
2697 parent_dev->exp.exp_cap &&
2698 (pcie_cap_get_type(parent_dev) == PCI_EXP_TYPE_ROOT_PORT ||
2699 pcie_cap_get_type(parent_dev) == PCI_EXP_TYPE_DOWNSTREAM);
2702 PCIDevice *pci_get_function_0(PCIDevice *pci_dev)
2704 PCIBus *bus = pci_get_bus(pci_dev);
2706 if(pcie_has_upstream_port(pci_dev)) {
2707 /* With an upstream PCIe port, we only support 1 device at slot 0 */
2708 return bus->devices[0];
2710 /* Other bus types might support multiple devices at slots 0-31 */
2711 return bus->devices[PCI_DEVFN(PCI_SLOT(pci_dev->devfn), 0)];
2715 MSIMessage pci_get_msi_message(PCIDevice *dev, int vector)
2718 if (msix_enabled(dev)) {
2719 msg = msix_get_message(dev, vector);
2720 } else if (msi_enabled(dev)) {
2721 msg = msi_get_message(dev, vector);
2723 /* Should never happen */
2724 error_report("%s: unknown interrupt type", __func__);
2730 static const TypeInfo pci_device_type_info = {
2731 .name = TYPE_PCI_DEVICE,
2732 .parent = TYPE_DEVICE,
2733 .instance_size = sizeof(PCIDevice),
2735 .class_size = sizeof(PCIDeviceClass),
2736 .class_init = pci_device_class_init,
2737 .class_base_init = pci_device_class_base_init,
2740 static void pci_register_types(void)
2742 type_register_static(&pci_bus_info);
2743 type_register_static(&pcie_bus_info);
2744 type_register_static(&conventional_pci_interface_info);
2745 type_register_static(&pcie_interface_info);
2746 type_register_static(&pci_device_type_info);
2749 type_init(pci_register_types)