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
26 #include "pci_bridge.h"
27 #include "pci_internals.h"
33 #include "qmp-commands.h"
39 # define PCI_DPRINTF(format, ...) printf(format, ## __VA_ARGS__)
41 # define PCI_DPRINTF(format, ...) do { } while (0)
44 static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent);
45 static char *pcibus_get_dev_path(DeviceState *dev);
46 static char *pcibus_get_fw_dev_path(DeviceState *dev);
47 static int pcibus_reset(BusState *qbus);
49 struct BusInfo pci_bus_info = {
51 .size = sizeof(PCIBus),
52 .print_dev = pcibus_dev_print,
53 .get_dev_path = pcibus_get_dev_path,
54 .get_fw_dev_path = pcibus_get_fw_dev_path,
55 .reset = pcibus_reset,
56 .props = (Property[]) {
57 DEFINE_PROP_PCI_DEVFN("addr", PCIDevice, devfn, -1),
58 DEFINE_PROP_STRING("romfile", PCIDevice, romfile),
59 DEFINE_PROP_UINT32("rombar", PCIDevice, rom_bar, 1),
60 DEFINE_PROP_BIT("multifunction", PCIDevice, cap_present,
61 QEMU_PCI_CAP_MULTIFUNCTION_BITNR, false),
62 DEFINE_PROP_BIT("command_serr_enable", PCIDevice, cap_present,
63 QEMU_PCI_CAP_SERR_BITNR, true),
64 DEFINE_PROP_END_OF_LIST()
68 static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num);
69 static void pci_update_mappings(PCIDevice *d);
70 static void pci_set_irq(void *opaque, int irq_num, int level);
71 static int pci_add_option_rom(PCIDevice *pdev, bool is_default_rom);
72 static void pci_del_option_rom(PCIDevice *pdev);
74 static uint16_t pci_default_sub_vendor_id = PCI_SUBVENDOR_ID_REDHAT_QUMRANET;
75 static uint16_t pci_default_sub_device_id = PCI_SUBDEVICE_ID_QEMU;
80 QLIST_ENTRY(PCIHostBus) next;
82 static QLIST_HEAD(, PCIHostBus) host_buses;
84 static const VMStateDescription vmstate_pcibus = {
87 .minimum_version_id = 1,
88 .minimum_version_id_old = 1,
89 .fields = (VMStateField []) {
90 VMSTATE_INT32_EQUAL(nirq, PCIBus),
91 VMSTATE_VARRAY_INT32(irq_count, PCIBus, nirq, 0, vmstate_info_int32, int32_t),
95 static int pci_bar(PCIDevice *d, int reg)
99 if (reg != PCI_ROM_SLOT)
100 return PCI_BASE_ADDRESS_0 + reg * 4;
102 type = d->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION;
103 return type == PCI_HEADER_TYPE_BRIDGE ? PCI_ROM_ADDRESS1 : PCI_ROM_ADDRESS;
106 static inline int pci_irq_state(PCIDevice *d, int irq_num)
108 return (d->irq_state >> irq_num) & 0x1;
111 static inline void pci_set_irq_state(PCIDevice *d, int irq_num, int level)
113 d->irq_state &= ~(0x1 << irq_num);
114 d->irq_state |= level << irq_num;
117 static void pci_change_irq_level(PCIDevice *pci_dev, int irq_num, int change)
122 irq_num = bus->map_irq(pci_dev, irq_num);
125 pci_dev = bus->parent_dev;
127 bus->irq_count[irq_num] += change;
128 bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0);
131 int pci_bus_get_irq_level(PCIBus *bus, int irq_num)
133 assert(irq_num >= 0);
134 assert(irq_num < bus->nirq);
135 return !!bus->irq_count[irq_num];
138 /* Update interrupt status bit in config space on interrupt
140 static void pci_update_irq_status(PCIDevice *dev)
142 if (dev->irq_state) {
143 dev->config[PCI_STATUS] |= PCI_STATUS_INTERRUPT;
145 dev->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT;
149 void pci_device_deassert_intx(PCIDevice *dev)
152 for (i = 0; i < PCI_NUM_PINS; ++i) {
153 qemu_set_irq(dev->irq[i], 0);
158 * This function is called on #RST and FLR.
159 * FLR if PCI_EXP_DEVCTL_BCR_FLR is set
161 void pci_device_reset(PCIDevice *dev)
165 qdev_reset_all(&dev->qdev);
168 pci_update_irq_status(dev);
169 pci_device_deassert_intx(dev);
170 /* Clear all writable bits */
171 pci_word_test_and_clear_mask(dev->config + PCI_COMMAND,
172 pci_get_word(dev->wmask + PCI_COMMAND) |
173 pci_get_word(dev->w1cmask + PCI_COMMAND));
174 pci_word_test_and_clear_mask(dev->config + PCI_STATUS,
175 pci_get_word(dev->wmask + PCI_STATUS) |
176 pci_get_word(dev->w1cmask + PCI_STATUS));
177 dev->config[PCI_CACHE_LINE_SIZE] = 0x0;
178 dev->config[PCI_INTERRUPT_LINE] = 0x0;
179 for (r = 0; r < PCI_NUM_REGIONS; ++r) {
180 PCIIORegion *region = &dev->io_regions[r];
185 if (!(region->type & PCI_BASE_ADDRESS_SPACE_IO) &&
186 region->type & PCI_BASE_ADDRESS_MEM_TYPE_64) {
187 pci_set_quad(dev->config + pci_bar(dev, r), region->type);
189 pci_set_long(dev->config + pci_bar(dev, r), region->type);
192 pci_update_mappings(dev);
199 * Trigger pci bus reset under a given bus.
200 * To be called on RST# assert.
202 void pci_bus_reset(PCIBus *bus)
206 for (i = 0; i < bus->nirq; i++) {
207 bus->irq_count[i] = 0;
209 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) {
210 if (bus->devices[i]) {
211 pci_device_reset(bus->devices[i]);
216 static int pcibus_reset(BusState *qbus)
218 pci_bus_reset(DO_UPCAST(PCIBus, qbus, qbus));
220 /* topology traverse is done by pci_bus_reset().
221 Tell qbus/qdev walker not to traverse the tree */
225 static void pci_host_bus_register(int domain, PCIBus *bus)
227 struct PCIHostBus *host;
228 host = g_malloc0(sizeof(*host));
229 host->domain = domain;
231 QLIST_INSERT_HEAD(&host_buses, host, next);
234 PCIBus *pci_find_root_bus(int domain)
236 struct PCIHostBus *host;
238 QLIST_FOREACH(host, &host_buses, next) {
239 if (host->domain == domain) {
247 int pci_find_domain(const PCIBus *bus)
250 struct PCIHostBus *host;
252 /* obtain root bus */
253 while ((d = bus->parent_dev) != NULL) {
257 QLIST_FOREACH(host, &host_buses, next) {
258 if (host->bus == bus) {
263 abort(); /* should not be reached */
267 void pci_bus_new_inplace(PCIBus *bus, DeviceState *parent,
269 MemoryRegion *address_space_mem,
270 MemoryRegion *address_space_io,
273 qbus_create_inplace(&bus->qbus, &pci_bus_info, parent, name);
274 assert(PCI_FUNC(devfn_min) == 0);
275 bus->devfn_min = devfn_min;
276 bus->address_space_mem = address_space_mem;
277 bus->address_space_io = address_space_io;
280 QLIST_INIT(&bus->child);
281 pci_host_bus_register(0, bus); /* for now only pci domain 0 is supported */
283 vmstate_register(NULL, -1, &vmstate_pcibus, bus);
286 PCIBus *pci_bus_new(DeviceState *parent, const char *name,
287 MemoryRegion *address_space_mem,
288 MemoryRegion *address_space_io,
293 bus = g_malloc0(sizeof(*bus));
294 bus->qbus.qdev_allocated = 1;
295 pci_bus_new_inplace(bus, parent, name, address_space_mem,
296 address_space_io, devfn_min);
300 void pci_bus_irqs(PCIBus *bus, pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
301 void *irq_opaque, int nirq)
303 bus->set_irq = set_irq;
304 bus->map_irq = map_irq;
305 bus->irq_opaque = irq_opaque;
307 bus->irq_count = g_malloc0(nirq * sizeof(bus->irq_count[0]));
310 void pci_bus_hotplug(PCIBus *bus, pci_hotplug_fn hotplug, DeviceState *qdev)
312 bus->qbus.allow_hotplug = 1;
313 bus->hotplug = hotplug;
314 bus->hotplug_qdev = qdev;
317 PCIBus *pci_register_bus(DeviceState *parent, const char *name,
318 pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
320 MemoryRegion *address_space_mem,
321 MemoryRegion *address_space_io,
322 uint8_t devfn_min, int nirq)
326 bus = pci_bus_new(parent, name, address_space_mem,
327 address_space_io, devfn_min);
328 pci_bus_irqs(bus, set_irq, map_irq, irq_opaque, nirq);
332 int pci_bus_num(PCIBus *s)
335 return 0; /* pci host bridge */
336 return s->parent_dev->config[PCI_SECONDARY_BUS];
339 static int get_pci_config_device(QEMUFile *f, void *pv, size_t size)
341 PCIDevice *s = container_of(pv, PCIDevice, config);
345 assert(size == pci_config_size(s));
346 config = g_malloc(size);
348 qemu_get_buffer(f, config, size);
349 for (i = 0; i < size; ++i) {
350 if ((config[i] ^ s->config[i]) &
351 s->cmask[i] & ~s->wmask[i] & ~s->w1cmask[i]) {
356 memcpy(s->config, config, size);
358 pci_update_mappings(s);
364 /* just put buffer */
365 static void put_pci_config_device(QEMUFile *f, void *pv, size_t size)
367 const uint8_t **v = pv;
368 assert(size == pci_config_size(container_of(pv, PCIDevice, config)));
369 qemu_put_buffer(f, *v, size);
372 static VMStateInfo vmstate_info_pci_config = {
373 .name = "pci config",
374 .get = get_pci_config_device,
375 .put = put_pci_config_device,
378 static int get_pci_irq_state(QEMUFile *f, void *pv, size_t size)
380 PCIDevice *s = container_of(pv, PCIDevice, irq_state);
381 uint32_t irq_state[PCI_NUM_PINS];
383 for (i = 0; i < PCI_NUM_PINS; ++i) {
384 irq_state[i] = qemu_get_be32(f);
385 if (irq_state[i] != 0x1 && irq_state[i] != 0) {
386 fprintf(stderr, "irq state %d: must be 0 or 1.\n",
392 for (i = 0; i < PCI_NUM_PINS; ++i) {
393 pci_set_irq_state(s, i, irq_state[i]);
399 static void put_pci_irq_state(QEMUFile *f, void *pv, size_t size)
402 PCIDevice *s = container_of(pv, PCIDevice, irq_state);
404 for (i = 0; i < PCI_NUM_PINS; ++i) {
405 qemu_put_be32(f, pci_irq_state(s, i));
409 static VMStateInfo vmstate_info_pci_irq_state = {
410 .name = "pci irq state",
411 .get = get_pci_irq_state,
412 .put = put_pci_irq_state,
415 const VMStateDescription vmstate_pci_device = {
418 .minimum_version_id = 1,
419 .minimum_version_id_old = 1,
420 .fields = (VMStateField []) {
421 VMSTATE_INT32_LE(version_id, PCIDevice),
422 VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0,
423 vmstate_info_pci_config,
424 PCI_CONFIG_SPACE_SIZE),
425 VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2,
426 vmstate_info_pci_irq_state,
427 PCI_NUM_PINS * sizeof(int32_t)),
428 VMSTATE_END_OF_LIST()
432 const VMStateDescription vmstate_pcie_device = {
435 .minimum_version_id = 1,
436 .minimum_version_id_old = 1,
437 .fields = (VMStateField []) {
438 VMSTATE_INT32_LE(version_id, PCIDevice),
439 VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0,
440 vmstate_info_pci_config,
441 PCIE_CONFIG_SPACE_SIZE),
442 VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2,
443 vmstate_info_pci_irq_state,
444 PCI_NUM_PINS * sizeof(int32_t)),
445 VMSTATE_END_OF_LIST()
449 static inline const VMStateDescription *pci_get_vmstate(PCIDevice *s)
451 return pci_is_express(s) ? &vmstate_pcie_device : &vmstate_pci_device;
454 void pci_device_save(PCIDevice *s, QEMUFile *f)
456 /* Clear interrupt status bit: it is implicit
457 * in irq_state which we are saving.
458 * This makes us compatible with old devices
459 * which never set or clear this bit. */
460 s->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT;
461 vmstate_save_state(f, pci_get_vmstate(s), s);
462 /* Restore the interrupt status bit. */
463 pci_update_irq_status(s);
466 int pci_device_load(PCIDevice *s, QEMUFile *f)
469 ret = vmstate_load_state(f, pci_get_vmstate(s), s, s->version_id);
470 /* Restore the interrupt status bit. */
471 pci_update_irq_status(s);
475 static void pci_set_default_subsystem_id(PCIDevice *pci_dev)
477 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID,
478 pci_default_sub_vendor_id);
479 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID,
480 pci_default_sub_device_id);
484 * Parse [[<domain>:]<bus>:]<slot>, return -1 on error if funcp == NULL
485 * [[<domain>:]<bus>:]<slot>.<func>, return -1 on error
487 static int pci_parse_devaddr(const char *addr, int *domp, int *busp,
488 unsigned int *slotp, unsigned int *funcp)
493 unsigned long dom = 0, bus = 0;
494 unsigned int slot = 0;
495 unsigned int func = 0;
498 val = strtoul(p, &e, 16);
504 val = strtoul(p, &e, 16);
511 val = strtoul(p, &e, 16);
524 val = strtoul(p, &e, 16);
531 /* if funcp == NULL func is 0 */
532 if (dom > 0xffff || bus > 0xff || slot > 0x1f || func > 7)
546 int pci_read_devaddr(Monitor *mon, const char *addr, int *domp, int *busp,
549 /* strip legacy tag */
550 if (!strncmp(addr, "pci_addr=", 9)) {
553 if (pci_parse_devaddr(addr, domp, busp, slotp, NULL)) {
554 monitor_printf(mon, "Invalid pci address\n");
560 PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr)
567 return pci_find_bus_nr(pci_find_root_bus(0), 0);
570 if (pci_parse_devaddr(devaddr, &dom, &bus, &slot, NULL) < 0) {
574 *devfnp = PCI_DEVFN(slot, 0);
575 return pci_find_bus_nr(pci_find_root_bus(dom), bus);
578 static void pci_init_cmask(PCIDevice *dev)
580 pci_set_word(dev->cmask + PCI_VENDOR_ID, 0xffff);
581 pci_set_word(dev->cmask + PCI_DEVICE_ID, 0xffff);
582 dev->cmask[PCI_STATUS] = PCI_STATUS_CAP_LIST;
583 dev->cmask[PCI_REVISION_ID] = 0xff;
584 dev->cmask[PCI_CLASS_PROG] = 0xff;
585 pci_set_word(dev->cmask + PCI_CLASS_DEVICE, 0xffff);
586 dev->cmask[PCI_HEADER_TYPE] = 0xff;
587 dev->cmask[PCI_CAPABILITY_LIST] = 0xff;
590 static void pci_init_wmask(PCIDevice *dev)
592 int config_size = pci_config_size(dev);
594 dev->wmask[PCI_CACHE_LINE_SIZE] = 0xff;
595 dev->wmask[PCI_INTERRUPT_LINE] = 0xff;
596 pci_set_word(dev->wmask + PCI_COMMAND,
597 PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
598 PCI_COMMAND_INTX_DISABLE);
599 if (dev->cap_present & QEMU_PCI_CAP_SERR) {
600 pci_word_test_and_set_mask(dev->wmask + PCI_COMMAND, PCI_COMMAND_SERR);
603 memset(dev->wmask + PCI_CONFIG_HEADER_SIZE, 0xff,
604 config_size - PCI_CONFIG_HEADER_SIZE);
607 static void pci_init_w1cmask(PCIDevice *dev)
610 * Note: It's okay to set w1cmask even for readonly bits as
611 * long as their value is hardwired to 0.
613 pci_set_word(dev->w1cmask + PCI_STATUS,
614 PCI_STATUS_PARITY | PCI_STATUS_SIG_TARGET_ABORT |
615 PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_REC_MASTER_ABORT |
616 PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY);
619 static void pci_init_mask_bridge(PCIDevice *d)
621 /* PCI_PRIMARY_BUS, PCI_SECONDARY_BUS, PCI_SUBORDINATE_BUS and
622 PCI_SEC_LETENCY_TIMER */
623 memset(d->wmask + PCI_PRIMARY_BUS, 0xff, 4);
626 d->wmask[PCI_IO_BASE] = PCI_IO_RANGE_MASK & 0xff;
627 d->wmask[PCI_IO_LIMIT] = PCI_IO_RANGE_MASK & 0xff;
628 pci_set_word(d->wmask + PCI_MEMORY_BASE,
629 PCI_MEMORY_RANGE_MASK & 0xffff);
630 pci_set_word(d->wmask + PCI_MEMORY_LIMIT,
631 PCI_MEMORY_RANGE_MASK & 0xffff);
632 pci_set_word(d->wmask + PCI_PREF_MEMORY_BASE,
633 PCI_PREF_RANGE_MASK & 0xffff);
634 pci_set_word(d->wmask + PCI_PREF_MEMORY_LIMIT,
635 PCI_PREF_RANGE_MASK & 0xffff);
637 /* PCI_PREF_BASE_UPPER32 and PCI_PREF_LIMIT_UPPER32 */
638 memset(d->wmask + PCI_PREF_BASE_UPPER32, 0xff, 8);
640 /* Supported memory and i/o types */
641 d->config[PCI_IO_BASE] |= PCI_IO_RANGE_TYPE_16;
642 d->config[PCI_IO_LIMIT] |= PCI_IO_RANGE_TYPE_16;
643 pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_BASE,
644 PCI_PREF_RANGE_TYPE_64);
645 pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_LIMIT,
646 PCI_PREF_RANGE_TYPE_64);
648 /* TODO: add this define to pci_regs.h in linux and then in qemu. */
649 #define PCI_BRIDGE_CTL_VGA_16BIT 0x10 /* VGA 16-bit decode */
650 #define PCI_BRIDGE_CTL_DISCARD 0x100 /* Primary discard timer */
651 #define PCI_BRIDGE_CTL_SEC_DISCARD 0x200 /* Secondary discard timer */
652 #define PCI_BRIDGE_CTL_DISCARD_STATUS 0x400 /* Discard timer status */
653 #define PCI_BRIDGE_CTL_DISCARD_SERR 0x800 /* Discard timer SERR# enable */
654 pci_set_word(d->wmask + PCI_BRIDGE_CONTROL,
655 PCI_BRIDGE_CTL_PARITY |
656 PCI_BRIDGE_CTL_SERR |
659 PCI_BRIDGE_CTL_VGA_16BIT |
660 PCI_BRIDGE_CTL_MASTER_ABORT |
661 PCI_BRIDGE_CTL_BUS_RESET |
662 PCI_BRIDGE_CTL_FAST_BACK |
663 PCI_BRIDGE_CTL_DISCARD |
664 PCI_BRIDGE_CTL_SEC_DISCARD |
665 PCI_BRIDGE_CTL_DISCARD_SERR);
666 /* Below does not do anything as we never set this bit, put here for
668 pci_set_word(d->w1cmask + PCI_BRIDGE_CONTROL,
669 PCI_BRIDGE_CTL_DISCARD_STATUS);
670 d->cmask[PCI_IO_BASE] |= PCI_IO_RANGE_TYPE_MASK;
671 d->cmask[PCI_IO_LIMIT] |= PCI_IO_RANGE_TYPE_MASK;
672 pci_word_test_and_set_mask(d->cmask + PCI_PREF_MEMORY_BASE,
673 PCI_PREF_RANGE_TYPE_MASK);
674 pci_word_test_and_set_mask(d->cmask + PCI_PREF_MEMORY_LIMIT,
675 PCI_PREF_RANGE_TYPE_MASK);
678 static int pci_init_multifunction(PCIBus *bus, PCIDevice *dev)
680 uint8_t slot = PCI_SLOT(dev->devfn);
683 if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
684 dev->config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION;
688 * multifunction bit is interpreted in two ways as follows.
689 * - all functions must set the bit to 1.
691 * - function 0 must set the bit, but the rest function (> 0)
692 * is allowed to leave the bit to 0.
693 * Example: PIIX3(also in qemu), PIIX4(also in qemu), ICH10,
695 * So OS (at least Linux) checks the bit of only function 0,
696 * and doesn't see the bit of function > 0.
698 * The below check allows both interpretation.
700 if (PCI_FUNC(dev->devfn)) {
701 PCIDevice *f0 = bus->devices[PCI_DEVFN(slot, 0)];
702 if (f0 && !(f0->cap_present & QEMU_PCI_CAP_MULTIFUNCTION)) {
703 /* function 0 should set multifunction bit */
704 error_report("PCI: single function device can't be populated "
705 "in function %x.%x", slot, PCI_FUNC(dev->devfn));
711 if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
714 /* function 0 indicates single function, so function > 0 must be NULL */
715 for (func = 1; func < PCI_FUNC_MAX; ++func) {
716 if (bus->devices[PCI_DEVFN(slot, func)]) {
717 error_report("PCI: %x.0 indicates single function, "
718 "but %x.%x is already populated.",
726 static void pci_config_alloc(PCIDevice *pci_dev)
728 int config_size = pci_config_size(pci_dev);
730 pci_dev->config = g_malloc0(config_size);
731 pci_dev->cmask = g_malloc0(config_size);
732 pci_dev->wmask = g_malloc0(config_size);
733 pci_dev->w1cmask = g_malloc0(config_size);
734 pci_dev->used = g_malloc0(config_size);
737 static void pci_config_free(PCIDevice *pci_dev)
739 g_free(pci_dev->config);
740 g_free(pci_dev->cmask);
741 g_free(pci_dev->wmask);
742 g_free(pci_dev->w1cmask);
743 g_free(pci_dev->used);
746 /* -1 for devfn means auto assign */
747 static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus,
748 const char *name, int devfn)
750 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev);
751 PCIConfigReadFunc *config_read = pc->config_read;
752 PCIConfigWriteFunc *config_write = pc->config_write;
755 for(devfn = bus->devfn_min ; devfn < ARRAY_SIZE(bus->devices);
756 devfn += PCI_FUNC_MAX) {
757 if (!bus->devices[devfn])
760 error_report("PCI: no slot/function available for %s, all in use", name);
763 } else if (bus->devices[devfn]) {
764 error_report("PCI: slot %d function %d not available for %s, in use by %s",
765 PCI_SLOT(devfn), PCI_FUNC(devfn), name, bus->devices[devfn]->name);
769 pci_dev->devfn = devfn;
770 pstrcpy(pci_dev->name, sizeof(pci_dev->name), name);
771 pci_dev->irq_state = 0;
772 pci_config_alloc(pci_dev);
774 pci_config_set_vendor_id(pci_dev->config, pc->vendor_id);
775 pci_config_set_device_id(pci_dev->config, pc->device_id);
776 pci_config_set_revision(pci_dev->config, pc->revision);
777 pci_config_set_class(pci_dev->config, pc->class_id);
779 if (!pc->is_bridge) {
780 if (pc->subsystem_vendor_id || pc->subsystem_id) {
781 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID,
782 pc->subsystem_vendor_id);
783 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID,
786 pci_set_default_subsystem_id(pci_dev);
789 /* subsystem_vendor_id/subsystem_id are only for header type 0 */
790 assert(!pc->subsystem_vendor_id);
791 assert(!pc->subsystem_id);
793 pci_init_cmask(pci_dev);
794 pci_init_wmask(pci_dev);
795 pci_init_w1cmask(pci_dev);
797 pci_init_mask_bridge(pci_dev);
799 if (pci_init_multifunction(bus, pci_dev)) {
800 pci_config_free(pci_dev);
805 config_read = pci_default_read_config;
807 config_write = pci_default_write_config;
808 pci_dev->config_read = config_read;
809 pci_dev->config_write = config_write;
810 bus->devices[devfn] = pci_dev;
811 pci_dev->irq = qemu_allocate_irqs(pci_set_irq, pci_dev, PCI_NUM_PINS);
812 pci_dev->version_id = 2; /* Current pci device vmstate version */
816 static void do_pci_unregister_device(PCIDevice *pci_dev)
818 qemu_free_irqs(pci_dev->irq);
819 pci_dev->bus->devices[pci_dev->devfn] = NULL;
820 pci_config_free(pci_dev);
823 static void pci_unregister_io_regions(PCIDevice *pci_dev)
828 for(i = 0; i < PCI_NUM_REGIONS; i++) {
829 r = &pci_dev->io_regions[i];
830 if (!r->size || r->addr == PCI_BAR_UNMAPPED)
832 memory_region_del_subregion(r->address_space, r->memory);
836 static int pci_unregister_device(DeviceState *dev)
838 PCIDevice *pci_dev = PCI_DEVICE(dev);
839 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev);
845 pci_unregister_io_regions(pci_dev);
846 pci_del_option_rom(pci_dev);
847 do_pci_unregister_device(pci_dev);
851 void pci_register_bar(PCIDevice *pci_dev, int region_num,
852 uint8_t type, MemoryRegion *memory)
857 pcibus_t size = memory_region_size(memory);
859 assert(region_num >= 0);
860 assert(region_num < PCI_NUM_REGIONS);
861 if (size & (size-1)) {
862 fprintf(stderr, "ERROR: PCI region size must be pow2 "
863 "type=0x%x, size=0x%"FMT_PCIBUS"\n", type, size);
867 r = &pci_dev->io_regions[region_num];
868 r->addr = PCI_BAR_UNMAPPED;
874 addr = pci_bar(pci_dev, region_num);
875 if (region_num == PCI_ROM_SLOT) {
876 /* ROM enable bit is writable */
877 wmask |= PCI_ROM_ADDRESS_ENABLE;
879 pci_set_long(pci_dev->config + addr, type);
880 if (!(r->type & PCI_BASE_ADDRESS_SPACE_IO) &&
881 r->type & PCI_BASE_ADDRESS_MEM_TYPE_64) {
882 pci_set_quad(pci_dev->wmask + addr, wmask);
883 pci_set_quad(pci_dev->cmask + addr, ~0ULL);
885 pci_set_long(pci_dev->wmask + addr, wmask & 0xffffffff);
886 pci_set_long(pci_dev->cmask + addr, 0xffffffff);
888 pci_dev->io_regions[region_num].memory = memory;
889 pci_dev->io_regions[region_num].address_space
890 = type & PCI_BASE_ADDRESS_SPACE_IO
891 ? pci_dev->bus->address_space_io
892 : pci_dev->bus->address_space_mem;
895 pcibus_t pci_get_bar_addr(PCIDevice *pci_dev, int region_num)
897 return pci_dev->io_regions[region_num].addr;
900 static pcibus_t pci_bar_address(PCIDevice *d,
901 int reg, uint8_t type, pcibus_t size)
903 pcibus_t new_addr, last_addr;
904 int bar = pci_bar(d, reg);
905 uint16_t cmd = pci_get_word(d->config + PCI_COMMAND);
907 if (type & PCI_BASE_ADDRESS_SPACE_IO) {
908 if (!(cmd & PCI_COMMAND_IO)) {
909 return PCI_BAR_UNMAPPED;
911 new_addr = pci_get_long(d->config + bar) & ~(size - 1);
912 last_addr = new_addr + size - 1;
913 /* NOTE: we have only 64K ioports on PC */
914 if (last_addr <= new_addr || new_addr == 0 || last_addr > UINT16_MAX) {
915 return PCI_BAR_UNMAPPED;
920 if (!(cmd & PCI_COMMAND_MEMORY)) {
921 return PCI_BAR_UNMAPPED;
923 if (type & PCI_BASE_ADDRESS_MEM_TYPE_64) {
924 new_addr = pci_get_quad(d->config + bar);
926 new_addr = pci_get_long(d->config + bar);
928 /* the ROM slot has a specific enable bit */
929 if (reg == PCI_ROM_SLOT && !(new_addr & PCI_ROM_ADDRESS_ENABLE)) {
930 return PCI_BAR_UNMAPPED;
932 new_addr &= ~(size - 1);
933 last_addr = new_addr + size - 1;
934 /* NOTE: we do not support wrapping */
935 /* XXX: as we cannot support really dynamic
936 mappings, we handle specific values as invalid
938 if (last_addr <= new_addr || new_addr == 0 ||
939 last_addr == PCI_BAR_UNMAPPED) {
940 return PCI_BAR_UNMAPPED;
943 /* Now pcibus_t is 64bit.
944 * Check if 32 bit BAR wraps around explicitly.
945 * Without this, PC ide doesn't work well.
946 * TODO: remove this work around.
948 if (!(type & PCI_BASE_ADDRESS_MEM_TYPE_64) && last_addr >= UINT32_MAX) {
949 return PCI_BAR_UNMAPPED;
953 * OS is allowed to set BAR beyond its addressable
954 * bits. For example, 32 bit OS can set 64bit bar
955 * to >4G. Check it. TODO: we might need to support
956 * it in the future for e.g. PAE.
958 if (last_addr >= TARGET_PHYS_ADDR_MAX) {
959 return PCI_BAR_UNMAPPED;
965 static void pci_update_mappings(PCIDevice *d)
971 for(i = 0; i < PCI_NUM_REGIONS; i++) {
972 r = &d->io_regions[i];
974 /* this region isn't registered */
978 new_addr = pci_bar_address(d, i, r->type, r->size);
980 /* This bar isn't changed */
981 if (new_addr == r->addr)
984 /* now do the real mapping */
985 if (r->addr != PCI_BAR_UNMAPPED) {
986 memory_region_del_subregion(r->address_space, r->memory);
989 if (r->addr != PCI_BAR_UNMAPPED) {
990 memory_region_add_subregion_overlap(r->address_space,
991 r->addr, r->memory, 1);
996 static inline int pci_irq_disabled(PCIDevice *d)
998 return pci_get_word(d->config + PCI_COMMAND) & PCI_COMMAND_INTX_DISABLE;
1001 /* Called after interrupt disabled field update in config space,
1002 * assert/deassert interrupts if necessary.
1003 * Gets original interrupt disable bit value (before update). */
1004 static void pci_update_irq_disabled(PCIDevice *d, int was_irq_disabled)
1006 int i, disabled = pci_irq_disabled(d);
1007 if (disabled == was_irq_disabled)
1009 for (i = 0; i < PCI_NUM_PINS; ++i) {
1010 int state = pci_irq_state(d, i);
1011 pci_change_irq_level(d, i, disabled ? -state : state);
1015 uint32_t pci_default_read_config(PCIDevice *d,
1016 uint32_t address, int len)
1020 memcpy(&val, d->config + address, len);
1021 return le32_to_cpu(val);
1024 void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l)
1026 int i, was_irq_disabled = pci_irq_disabled(d);
1028 for (i = 0; i < l; val >>= 8, ++i) {
1029 uint8_t wmask = d->wmask[addr + i];
1030 uint8_t w1cmask = d->w1cmask[addr + i];
1031 assert(!(wmask & w1cmask));
1032 d->config[addr + i] = (d->config[addr + i] & ~wmask) | (val & wmask);
1033 d->config[addr + i] &= ~(val & w1cmask); /* W1C: Write 1 to Clear */
1035 if (ranges_overlap(addr, l, PCI_BASE_ADDRESS_0, 24) ||
1036 ranges_overlap(addr, l, PCI_ROM_ADDRESS, 4) ||
1037 ranges_overlap(addr, l, PCI_ROM_ADDRESS1, 4) ||
1038 range_covers_byte(addr, l, PCI_COMMAND))
1039 pci_update_mappings(d);
1041 if (range_covers_byte(addr, l, PCI_COMMAND))
1042 pci_update_irq_disabled(d, was_irq_disabled);
1044 msi_write_config(d, addr, val, l);
1045 msix_write_config(d, addr, val, l);
1048 /***********************************************************/
1049 /* generic PCI irq support */
1051 /* 0 <= irq_num <= 3. level must be 0 or 1 */
1052 static void pci_set_irq(void *opaque, int irq_num, int level)
1054 PCIDevice *pci_dev = opaque;
1057 change = level - pci_irq_state(pci_dev, irq_num);
1061 pci_set_irq_state(pci_dev, irq_num, level);
1062 pci_update_irq_status(pci_dev);
1063 if (pci_irq_disabled(pci_dev))
1065 pci_change_irq_level(pci_dev, irq_num, change);
1068 /***********************************************************/
1069 /* monitor info on PCI */
1074 const char *fw_name;
1075 uint16_t fw_ign_bits;
1078 static const pci_class_desc pci_class_descriptions[] =
1080 { 0x0001, "VGA controller", "display"},
1081 { 0x0100, "SCSI controller", "scsi"},
1082 { 0x0101, "IDE controller", "ide"},
1083 { 0x0102, "Floppy controller", "fdc"},
1084 { 0x0103, "IPI controller", "ipi"},
1085 { 0x0104, "RAID controller", "raid"},
1086 { 0x0106, "SATA controller"},
1087 { 0x0107, "SAS controller"},
1088 { 0x0180, "Storage controller"},
1089 { 0x0200, "Ethernet controller", "ethernet"},
1090 { 0x0201, "Token Ring controller", "token-ring"},
1091 { 0x0202, "FDDI controller", "fddi"},
1092 { 0x0203, "ATM controller", "atm"},
1093 { 0x0280, "Network controller"},
1094 { 0x0300, "VGA controller", "display", 0x00ff},
1095 { 0x0301, "XGA controller"},
1096 { 0x0302, "3D controller"},
1097 { 0x0380, "Display controller"},
1098 { 0x0400, "Video controller", "video"},
1099 { 0x0401, "Audio controller", "sound"},
1101 { 0x0403, "Audio controller", "sound"},
1102 { 0x0480, "Multimedia controller"},
1103 { 0x0500, "RAM controller", "memory"},
1104 { 0x0501, "Flash controller", "flash"},
1105 { 0x0580, "Memory controller"},
1106 { 0x0600, "Host bridge", "host"},
1107 { 0x0601, "ISA bridge", "isa"},
1108 { 0x0602, "EISA bridge", "eisa"},
1109 { 0x0603, "MC bridge", "mca"},
1110 { 0x0604, "PCI bridge", "pci"},
1111 { 0x0605, "PCMCIA bridge", "pcmcia"},
1112 { 0x0606, "NUBUS bridge", "nubus"},
1113 { 0x0607, "CARDBUS bridge", "cardbus"},
1114 { 0x0608, "RACEWAY bridge"},
1115 { 0x0680, "Bridge"},
1116 { 0x0700, "Serial port", "serial"},
1117 { 0x0701, "Parallel port", "parallel"},
1118 { 0x0800, "Interrupt controller", "interrupt-controller"},
1119 { 0x0801, "DMA controller", "dma-controller"},
1120 { 0x0802, "Timer", "timer"},
1121 { 0x0803, "RTC", "rtc"},
1122 { 0x0900, "Keyboard", "keyboard"},
1123 { 0x0901, "Pen", "pen"},
1124 { 0x0902, "Mouse", "mouse"},
1125 { 0x0A00, "Dock station", "dock", 0x00ff},
1126 { 0x0B00, "i386 cpu", "cpu", 0x00ff},
1127 { 0x0c00, "Fireware contorller", "fireware"},
1128 { 0x0c01, "Access bus controller", "access-bus"},
1129 { 0x0c02, "SSA controller", "ssa"},
1130 { 0x0c03, "USB controller", "usb"},
1131 { 0x0c04, "Fibre channel controller", "fibre-channel"},
1135 static void pci_for_each_device_under_bus(PCIBus *bus,
1136 void (*fn)(PCIBus *b, PCIDevice *d))
1141 for(devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) {
1142 d = bus->devices[devfn];
1149 void pci_for_each_device(PCIBus *bus, int bus_num,
1150 void (*fn)(PCIBus *b, PCIDevice *d))
1152 bus = pci_find_bus_nr(bus, bus_num);
1155 pci_for_each_device_under_bus(bus, fn);
1159 static const pci_class_desc *get_class_desc(int class)
1161 const pci_class_desc *desc;
1163 desc = pci_class_descriptions;
1164 while (desc->desc && class != desc->class) {
1171 static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num);
1173 static PciMemoryRegionList *qmp_query_pci_regions(const PCIDevice *dev)
1175 PciMemoryRegionList *head = NULL, *cur_item = NULL;
1178 for (i = 0; i < PCI_NUM_REGIONS; i++) {
1179 const PCIIORegion *r = &dev->io_regions[i];
1180 PciMemoryRegionList *region;
1186 region = g_malloc0(sizeof(*region));
1187 region->value = g_malloc0(sizeof(*region->value));
1189 if (r->type & PCI_BASE_ADDRESS_SPACE_IO) {
1190 region->value->type = g_strdup("io");
1192 region->value->type = g_strdup("memory");
1193 region->value->has_prefetch = true;
1194 region->value->prefetch = !!(r->type & PCI_BASE_ADDRESS_MEM_PREFETCH);
1195 region->value->has_mem_type_64 = true;
1196 region->value->mem_type_64 = !!(r->type & PCI_BASE_ADDRESS_MEM_TYPE_64);
1199 region->value->bar = i;
1200 region->value->address = r->addr;
1201 region->value->size = r->size;
1203 /* XXX: waiting for the qapi to support GSList */
1205 head = cur_item = region;
1207 cur_item->next = region;
1215 static PciBridgeInfo *qmp_query_pci_bridge(PCIDevice *dev, PCIBus *bus,
1218 PciBridgeInfo *info;
1220 info = g_malloc0(sizeof(*info));
1222 info->bus.number = dev->config[PCI_PRIMARY_BUS];
1223 info->bus.secondary = dev->config[PCI_SECONDARY_BUS];
1224 info->bus.subordinate = dev->config[PCI_SUBORDINATE_BUS];
1226 info->bus.io_range = g_malloc0(sizeof(*info->bus.io_range));
1227 info->bus.io_range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_IO);
1228 info->bus.io_range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_IO);
1230 info->bus.memory_range = g_malloc0(sizeof(*info->bus.memory_range));
1231 info->bus.memory_range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_MEMORY);
1232 info->bus.memory_range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_MEMORY);
1234 info->bus.prefetchable_range = g_malloc0(sizeof(*info->bus.prefetchable_range));
1235 info->bus.prefetchable_range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
1236 info->bus.prefetchable_range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
1238 if (dev->config[PCI_SECONDARY_BUS] != 0) {
1239 PCIBus *child_bus = pci_find_bus_nr(bus, dev->config[PCI_SECONDARY_BUS]);
1241 info->has_devices = true;
1242 info->devices = qmp_query_pci_devices(child_bus, dev->config[PCI_SECONDARY_BUS]);
1249 static PciDeviceInfo *qmp_query_pci_device(PCIDevice *dev, PCIBus *bus,
1252 const pci_class_desc *desc;
1253 PciDeviceInfo *info;
1257 info = g_malloc0(sizeof(*info));
1258 info->bus = bus_num;
1259 info->slot = PCI_SLOT(dev->devfn);
1260 info->function = PCI_FUNC(dev->devfn);
1262 class = pci_get_word(dev->config + PCI_CLASS_DEVICE);
1263 info->class_info.class = class;
1264 desc = get_class_desc(class);
1266 info->class_info.has_desc = true;
1267 info->class_info.desc = g_strdup(desc->desc);
1270 info->id.vendor = pci_get_word(dev->config + PCI_VENDOR_ID);
1271 info->id.device = pci_get_word(dev->config + PCI_DEVICE_ID);
1272 info->regions = qmp_query_pci_regions(dev);
1273 info->qdev_id = g_strdup(dev->qdev.id ? dev->qdev.id : "");
1275 if (dev->config[PCI_INTERRUPT_PIN] != 0) {
1276 info->has_irq = true;
1277 info->irq = dev->config[PCI_INTERRUPT_LINE];
1280 type = dev->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION;
1281 if (type == PCI_HEADER_TYPE_BRIDGE) {
1282 info->has_pci_bridge = true;
1283 info->pci_bridge = qmp_query_pci_bridge(dev, bus, bus_num);
1289 static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num)
1291 PciDeviceInfoList *info, *head = NULL, *cur_item = NULL;
1295 for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) {
1296 dev = bus->devices[devfn];
1298 info = g_malloc0(sizeof(*info));
1299 info->value = qmp_query_pci_device(dev, bus, bus_num);
1301 /* XXX: waiting for the qapi to support GSList */
1303 head = cur_item = info;
1305 cur_item->next = info;
1314 static PciInfo *qmp_query_pci_bus(PCIBus *bus, int bus_num)
1316 PciInfo *info = NULL;
1318 bus = pci_find_bus_nr(bus, bus_num);
1320 info = g_malloc0(sizeof(*info));
1321 info->bus = bus_num;
1322 info->devices = qmp_query_pci_devices(bus, bus_num);
1328 PciInfoList *qmp_query_pci(Error **errp)
1330 PciInfoList *info, *head = NULL, *cur_item = NULL;
1331 struct PCIHostBus *host;
1333 QLIST_FOREACH(host, &host_buses, next) {
1334 info = g_malloc0(sizeof(*info));
1335 info->value = qmp_query_pci_bus(host->bus, 0);
1337 /* XXX: waiting for the qapi to support GSList */
1339 head = cur_item = info;
1341 cur_item->next = info;
1349 static const char * const pci_nic_models[] = {
1361 static const char * const pci_nic_names[] = {
1373 /* Initialize a PCI NIC. */
1374 /* FIXME callers should check for failure, but don't */
1375 PCIDevice *pci_nic_init(NICInfo *nd, const char *default_model,
1376 const char *default_devaddr)
1378 const char *devaddr = nd->devaddr ? nd->devaddr : default_devaddr;
1385 i = qemu_find_nic_model(nd, pci_nic_models, default_model);
1389 bus = pci_get_bus_devfn(&devfn, devaddr);
1391 error_report("Invalid PCI device address %s for device %s",
1392 devaddr, pci_nic_names[i]);
1396 pci_dev = pci_create(bus, devfn, pci_nic_names[i]);
1397 dev = &pci_dev->qdev;
1398 qdev_set_nic_properties(dev, nd);
1399 if (qdev_init(dev) < 0)
1404 PCIDevice *pci_nic_init_nofail(NICInfo *nd, const char *default_model,
1405 const char *default_devaddr)
1409 if (qemu_show_nic_models(nd->model, pci_nic_models))
1412 res = pci_nic_init(nd, default_model, default_devaddr);
1418 /* Whether a given bus number is in range of the secondary
1419 * bus of the given bridge device. */
1420 static bool pci_secondary_bus_in_range(PCIDevice *dev, int bus_num)
1422 return !(pci_get_word(dev->config + PCI_BRIDGE_CONTROL) &
1423 PCI_BRIDGE_CTL_BUS_RESET) /* Don't walk the bus if it's reset. */ &&
1424 dev->config[PCI_SECONDARY_BUS] < bus_num &&
1425 bus_num <= dev->config[PCI_SUBORDINATE_BUS];
1428 static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num)
1436 if (pci_bus_num(bus) == bus_num) {
1440 /* Consider all bus numbers in range for the host pci bridge. */
1441 if (bus->parent_dev &&
1442 !pci_secondary_bus_in_range(bus->parent_dev, bus_num)) {
1447 for (; bus; bus = sec) {
1448 QLIST_FOREACH(sec, &bus->child, sibling) {
1449 assert(sec->parent_dev);
1450 if (sec->parent_dev->config[PCI_SECONDARY_BUS] == bus_num) {
1453 if (pci_secondary_bus_in_range(sec->parent_dev, bus_num)) {
1462 PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn)
1464 bus = pci_find_bus_nr(bus, bus_num);
1469 return bus->devices[devfn];
1472 static int pci_qdev_init(DeviceState *qdev)
1474 PCIDevice *pci_dev = (PCIDevice *)qdev;
1475 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev);
1478 bool is_default_rom;
1480 /* initialize cap_present for pci_is_express() and pci_config_size() */
1481 if (pc->is_express) {
1482 pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS;
1485 bus = FROM_QBUS(PCIBus, qdev_get_parent_bus(qdev));
1486 pci_dev = do_pci_register_device(pci_dev, bus,
1487 object_get_typename(OBJECT(qdev)),
1489 if (pci_dev == NULL)
1491 if (qdev->hotplugged && pc->no_hotplug) {
1492 qerror_report(QERR_DEVICE_NO_HOTPLUG, object_get_typename(OBJECT(pci_dev)));
1493 do_pci_unregister_device(pci_dev);
1497 rc = pc->init(pci_dev);
1499 do_pci_unregister_device(pci_dev);
1505 is_default_rom = false;
1506 if (pci_dev->romfile == NULL && pc->romfile != NULL) {
1507 pci_dev->romfile = g_strdup(pc->romfile);
1508 is_default_rom = true;
1510 pci_add_option_rom(pci_dev, is_default_rom);
1513 /* Let buses differentiate between hotplug and when device is
1514 * enabled during qemu machine creation. */
1515 rc = bus->hotplug(bus->hotplug_qdev, pci_dev,
1516 qdev->hotplugged ? PCI_HOTPLUG_ENABLED:
1517 PCI_COLDPLUG_ENABLED);
1519 int r = pci_unregister_device(&pci_dev->qdev);
1527 static int pci_unplug_device(DeviceState *qdev)
1529 PCIDevice *dev = PCI_DEVICE(qdev);
1530 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev);
1532 if (pc->no_hotplug) {
1533 qerror_report(QERR_DEVICE_NO_HOTPLUG, object_get_typename(OBJECT(dev)));
1536 return dev->bus->hotplug(dev->bus->hotplug_qdev, dev,
1537 PCI_HOTPLUG_DISABLED);
1540 PCIDevice *pci_create_multifunction(PCIBus *bus, int devfn, bool multifunction,
1545 dev = qdev_create(&bus->qbus, name);
1546 qdev_prop_set_uint32(dev, "addr", devfn);
1547 qdev_prop_set_bit(dev, "multifunction", multifunction);
1548 return PCI_DEVICE(dev);
1551 PCIDevice *pci_create_simple_multifunction(PCIBus *bus, int devfn,
1555 PCIDevice *dev = pci_create_multifunction(bus, devfn, multifunction, name);
1556 qdev_init_nofail(&dev->qdev);
1560 PCIDevice *pci_create(PCIBus *bus, int devfn, const char *name)
1562 return pci_create_multifunction(bus, devfn, false, name);
1565 PCIDevice *pci_create_simple(PCIBus *bus, int devfn, const char *name)
1567 return pci_create_simple_multifunction(bus, devfn, false, name);
1570 static int pci_find_space(PCIDevice *pdev, uint8_t size)
1572 int config_size = pci_config_size(pdev);
1573 int offset = PCI_CONFIG_HEADER_SIZE;
1575 for (i = PCI_CONFIG_HEADER_SIZE; i < config_size; ++i)
1578 else if (i - offset + 1 == size)
1583 static uint8_t pci_find_capability_list(PCIDevice *pdev, uint8_t cap_id,
1588 if (!(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST))
1591 for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]);
1592 prev = next + PCI_CAP_LIST_NEXT)
1593 if (pdev->config[next + PCI_CAP_LIST_ID] == cap_id)
1601 static uint8_t pci_find_capability_at_offset(PCIDevice *pdev, uint8_t offset)
1603 uint8_t next, prev, found = 0;
1605 if (!(pdev->used[offset])) {
1609 assert(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST);
1611 for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]);
1612 prev = next + PCI_CAP_LIST_NEXT) {
1613 if (next <= offset && next > found) {
1620 /* Patch the PCI vendor and device ids in a PCI rom image if necessary.
1621 This is needed for an option rom which is used for more than one device. */
1622 static void pci_patch_ids(PCIDevice *pdev, uint8_t *ptr, int size)
1626 uint16_t rom_vendor_id;
1627 uint16_t rom_device_id;
1629 uint16_t pcir_offset;
1632 /* Words in rom data are little endian (like in PCI configuration),
1633 so they can be read / written with pci_get_word / pci_set_word. */
1635 /* Only a valid rom will be patched. */
1636 rom_magic = pci_get_word(ptr);
1637 if (rom_magic != 0xaa55) {
1638 PCI_DPRINTF("Bad ROM magic %04x\n", rom_magic);
1641 pcir_offset = pci_get_word(ptr + 0x18);
1642 if (pcir_offset + 8 >= size || memcmp(ptr + pcir_offset, "PCIR", 4)) {
1643 PCI_DPRINTF("Bad PCIR offset 0x%x or signature\n", pcir_offset);
1647 vendor_id = pci_get_word(pdev->config + PCI_VENDOR_ID);
1648 device_id = pci_get_word(pdev->config + PCI_DEVICE_ID);
1649 rom_vendor_id = pci_get_word(ptr + pcir_offset + 4);
1650 rom_device_id = pci_get_word(ptr + pcir_offset + 6);
1652 PCI_DPRINTF("%s: ROM id %04x%04x / PCI id %04x%04x\n", pdev->romfile,
1653 vendor_id, device_id, rom_vendor_id, rom_device_id);
1657 if (vendor_id != rom_vendor_id) {
1658 /* Patch vendor id and checksum (at offset 6 for etherboot roms). */
1659 checksum += (uint8_t)rom_vendor_id + (uint8_t)(rom_vendor_id >> 8);
1660 checksum -= (uint8_t)vendor_id + (uint8_t)(vendor_id >> 8);
1661 PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum);
1663 pci_set_word(ptr + pcir_offset + 4, vendor_id);
1666 if (device_id != rom_device_id) {
1667 /* Patch device id and checksum (at offset 6 for etherboot roms). */
1668 checksum += (uint8_t)rom_device_id + (uint8_t)(rom_device_id >> 8);
1669 checksum -= (uint8_t)device_id + (uint8_t)(device_id >> 8);
1670 PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum);
1672 pci_set_word(ptr + pcir_offset + 6, device_id);
1676 /* Add an option rom for the device */
1677 static int pci_add_option_rom(PCIDevice *pdev, bool is_default_rom)
1683 const VMStateDescription *vmsd;
1687 if (strlen(pdev->romfile) == 0)
1690 if (!pdev->rom_bar) {
1692 * Load rom via fw_cfg instead of creating a rom bar,
1693 * for 0.11 compatibility.
1695 int class = pci_get_word(pdev->config + PCI_CLASS_DEVICE);
1696 if (class == 0x0300) {
1697 rom_add_vga(pdev->romfile);
1699 rom_add_option(pdev->romfile, -1);
1704 path = qemu_find_file(QEMU_FILE_TYPE_BIOS, pdev->romfile);
1706 path = g_strdup(pdev->romfile);
1709 size = get_image_size(path);
1711 error_report("%s: failed to find romfile \"%s\"",
1712 __FUNCTION__, pdev->romfile);
1716 if (size & (size - 1)) {
1717 size = 1 << qemu_fls(size);
1720 vmsd = qdev_get_vmsd(DEVICE(pdev));
1723 snprintf(name, sizeof(name), "%s.rom", vmsd->name);
1725 snprintf(name, sizeof(name), "%s.rom", object_get_typename(OBJECT(pdev)));
1727 pdev->has_rom = true;
1728 memory_region_init_ram(&pdev->rom, name, size);
1729 vmstate_register_ram(&pdev->rom, &pdev->qdev);
1730 ptr = memory_region_get_ram_ptr(&pdev->rom);
1731 load_image(path, ptr);
1734 if (is_default_rom) {
1735 /* Only the default rom images will be patched (if needed). */
1736 pci_patch_ids(pdev, ptr, size);
1739 qemu_put_ram_ptr(ptr);
1741 pci_register_bar(pdev, PCI_ROM_SLOT, 0, &pdev->rom);
1746 static void pci_del_option_rom(PCIDevice *pdev)
1751 vmstate_unregister_ram(&pdev->rom, &pdev->qdev);
1752 memory_region_destroy(&pdev->rom);
1753 pdev->has_rom = false;
1758 * Reserve space and add capability to the linked list in pci config space
1761 * Find and reserve space and add capability to the linked list
1762 * in pci config space */
1763 int pci_add_capability(PCIDevice *pdev, uint8_t cap_id,
1764 uint8_t offset, uint8_t size)
1767 int i, overlapping_cap;
1770 offset = pci_find_space(pdev, size);
1775 /* Verify that capabilities don't overlap. Note: device assignment
1776 * depends on this check to verify that the device is not broken.
1777 * Should never trigger for emulated devices, but it's helpful
1778 * for debugging these. */
1779 for (i = offset; i < offset + size; i++) {
1780 overlapping_cap = pci_find_capability_at_offset(pdev, i);
1781 if (overlapping_cap) {
1782 fprintf(stderr, "ERROR: %04x:%02x:%02x.%x "
1783 "Attempt to add PCI capability %x at offset "
1784 "%x overlaps existing capability %x at offset %x\n",
1785 pci_find_domain(pdev->bus), pci_bus_num(pdev->bus),
1786 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn),
1787 cap_id, offset, overlapping_cap, i);
1793 config = pdev->config + offset;
1794 config[PCI_CAP_LIST_ID] = cap_id;
1795 config[PCI_CAP_LIST_NEXT] = pdev->config[PCI_CAPABILITY_LIST];
1796 pdev->config[PCI_CAPABILITY_LIST] = offset;
1797 pdev->config[PCI_STATUS] |= PCI_STATUS_CAP_LIST;
1798 memset(pdev->used + offset, 0xFF, size);
1799 /* Make capability read-only by default */
1800 memset(pdev->wmask + offset, 0, size);
1801 /* Check capability by default */
1802 memset(pdev->cmask + offset, 0xFF, size);
1806 /* Unlink capability from the pci config space. */
1807 void pci_del_capability(PCIDevice *pdev, uint8_t cap_id, uint8_t size)
1809 uint8_t prev, offset = pci_find_capability_list(pdev, cap_id, &prev);
1812 pdev->config[prev] = pdev->config[offset + PCI_CAP_LIST_NEXT];
1813 /* Make capability writable again */
1814 memset(pdev->wmask + offset, 0xff, size);
1815 memset(pdev->w1cmask + offset, 0, size);
1816 /* Clear cmask as device-specific registers can't be checked */
1817 memset(pdev->cmask + offset, 0, size);
1818 memset(pdev->used + offset, 0, size);
1820 if (!pdev->config[PCI_CAPABILITY_LIST])
1821 pdev->config[PCI_STATUS] &= ~PCI_STATUS_CAP_LIST;
1824 uint8_t pci_find_capability(PCIDevice *pdev, uint8_t cap_id)
1826 return pci_find_capability_list(pdev, cap_id, NULL);
1829 static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent)
1831 PCIDevice *d = (PCIDevice *)dev;
1832 const pci_class_desc *desc;
1837 class = pci_get_word(d->config + PCI_CLASS_DEVICE);
1838 desc = pci_class_descriptions;
1839 while (desc->desc && class != desc->class)
1842 snprintf(ctxt, sizeof(ctxt), "%s", desc->desc);
1844 snprintf(ctxt, sizeof(ctxt), "Class %04x", class);
1847 monitor_printf(mon, "%*sclass %s, addr %02x:%02x.%x, "
1848 "pci id %04x:%04x (sub %04x:%04x)\n",
1849 indent, "", ctxt, pci_bus_num(d->bus),
1850 PCI_SLOT(d->devfn), PCI_FUNC(d->devfn),
1851 pci_get_word(d->config + PCI_VENDOR_ID),
1852 pci_get_word(d->config + PCI_DEVICE_ID),
1853 pci_get_word(d->config + PCI_SUBSYSTEM_VENDOR_ID),
1854 pci_get_word(d->config + PCI_SUBSYSTEM_ID));
1855 for (i = 0; i < PCI_NUM_REGIONS; i++) {
1856 r = &d->io_regions[i];
1859 monitor_printf(mon, "%*sbar %d: %s at 0x%"FMT_PCIBUS
1860 " [0x%"FMT_PCIBUS"]\n",
1862 i, r->type & PCI_BASE_ADDRESS_SPACE_IO ? "i/o" : "mem",
1863 r->addr, r->addr + r->size - 1);
1867 static char *pci_dev_fw_name(DeviceState *dev, char *buf, int len)
1869 PCIDevice *d = (PCIDevice *)dev;
1870 const char *name = NULL;
1871 const pci_class_desc *desc = pci_class_descriptions;
1872 int class = pci_get_word(d->config + PCI_CLASS_DEVICE);
1874 while (desc->desc &&
1875 (class & ~desc->fw_ign_bits) !=
1876 (desc->class & ~desc->fw_ign_bits)) {
1881 name = desc->fw_name;
1885 pstrcpy(buf, len, name);
1887 snprintf(buf, len, "pci%04x,%04x",
1888 pci_get_word(d->config + PCI_VENDOR_ID),
1889 pci_get_word(d->config + PCI_DEVICE_ID));
1895 static char *pcibus_get_fw_dev_path(DeviceState *dev)
1897 PCIDevice *d = (PCIDevice *)dev;
1898 char path[50], name[33];
1901 off = snprintf(path, sizeof(path), "%s@%x",
1902 pci_dev_fw_name(dev, name, sizeof name),
1903 PCI_SLOT(d->devfn));
1904 if (PCI_FUNC(d->devfn))
1905 snprintf(path + off, sizeof(path) + off, ",%x", PCI_FUNC(d->devfn));
1906 return strdup(path);
1909 static char *pcibus_get_dev_path(DeviceState *dev)
1911 PCIDevice *d = container_of(dev, PCIDevice, qdev);
1914 /* Path format: Domain:00:Slot.Function:Slot.Function....:Slot.Function.
1915 * 00 is added here to make this format compatible with
1916 * domain:Bus:Slot.Func for systems without nested PCI bridges.
1917 * Slot.Function list specifies the slot and function numbers for all
1918 * devices on the path from root to the specific device. */
1919 char domain[] = "DDDD:00";
1920 char slot[] = ":SS.F";
1921 int domain_len = sizeof domain - 1 /* For '\0' */;
1922 int slot_len = sizeof slot - 1 /* For '\0' */;
1927 /* Calculate # of slots on path between device and root. */;
1929 for (t = d; t; t = t->bus->parent_dev) {
1933 path_len = domain_len + slot_len * slot_depth;
1935 /* Allocate memory, fill in the terminating null byte. */
1936 path = g_malloc(path_len + 1 /* For '\0' */);
1937 path[path_len] = '\0';
1939 /* First field is the domain. */
1940 s = snprintf(domain, sizeof domain, "%04x:00", pci_find_domain(d->bus));
1941 assert(s == domain_len);
1942 memcpy(path, domain, domain_len);
1944 /* Fill in slot numbers. We walk up from device to root, so need to print
1945 * them in the reverse order, last to first. */
1946 p = path + path_len;
1947 for (t = d; t; t = t->bus->parent_dev) {
1949 s = snprintf(slot, sizeof slot, ":%02x.%x",
1950 PCI_SLOT(t->devfn), PCI_FUNC(t->devfn));
1951 assert(s == slot_len);
1952 memcpy(p, slot, slot_len);
1958 static int pci_qdev_find_recursive(PCIBus *bus,
1959 const char *id, PCIDevice **pdev)
1961 DeviceState *qdev = qdev_find_recursive(&bus->qbus, id);
1966 /* roughly check if given qdev is pci device */
1967 if (object_dynamic_cast(OBJECT(qdev), TYPE_PCI_DEVICE)) {
1968 *pdev = PCI_DEVICE(qdev);
1974 int pci_qdev_find_device(const char *id, PCIDevice **pdev)
1976 struct PCIHostBus *host;
1979 QLIST_FOREACH(host, &host_buses, next) {
1980 int tmp = pci_qdev_find_recursive(host->bus, id, pdev);
1985 if (tmp != -ENODEV) {
1993 MemoryRegion *pci_address_space(PCIDevice *dev)
1995 return dev->bus->address_space_mem;
1998 MemoryRegion *pci_address_space_io(PCIDevice *dev)
2000 return dev->bus->address_space_io;
2003 static void pci_device_class_init(ObjectClass *klass, void *data)
2005 DeviceClass *k = DEVICE_CLASS(klass);
2006 k->init = pci_qdev_init;
2007 k->unplug = pci_unplug_device;
2008 k->exit = pci_unregister_device;
2009 k->bus_info = &pci_bus_info;
2012 static TypeInfo pci_device_type_info = {
2013 .name = TYPE_PCI_DEVICE,
2014 .parent = TYPE_DEVICE,
2015 .instance_size = sizeof(PCIDevice),
2017 .class_size = sizeof(PCIDeviceClass),
2018 .class_init = pci_device_class_init,
2021 static void pci_register_types(void)
2023 type_register_static(&pci_device_type_info);
2026 type_init(pci_register_types)