/* * QEMU PCI bus manager * * Copyright (c) 2004 Fabrice Bellard * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "hw/hw.h" #include "hw/pci/pci.h" #include "hw/pci/pci_bridge.h" #include "hw/pci/pci_bus.h" #include "hw/pci/pci_host.h" #include "monitor/monitor.h" #include "net/net.h" #include "sysemu/sysemu.h" #include "hw/loader.h" #include "qemu/range.h" #include "qmp-commands.h" #include "hw/pci/msi.h" #include "hw/pci/msix.h" #include "exec/address-spaces.h" //#define DEBUG_PCI #ifdef DEBUG_PCI # define PCI_DPRINTF(format, ...) printf(format, ## __VA_ARGS__) #else # define PCI_DPRINTF(format, ...) do { } while (0) #endif static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent); static char *pcibus_get_dev_path(DeviceState *dev); static char *pcibus_get_fw_dev_path(DeviceState *dev); static int pcibus_reset(BusState *qbus); static Property pci_props[] = { DEFINE_PROP_PCI_DEVFN("addr", PCIDevice, devfn, -1), DEFINE_PROP_STRING("romfile", PCIDevice, romfile), DEFINE_PROP_UINT32("rombar", PCIDevice, rom_bar, 1), DEFINE_PROP_BIT("multifunction", PCIDevice, cap_present, QEMU_PCI_CAP_MULTIFUNCTION_BITNR, false), DEFINE_PROP_BIT("command_serr_enable", PCIDevice, cap_present, QEMU_PCI_CAP_SERR_BITNR, true), DEFINE_PROP_END_OF_LIST() }; static void pci_bus_class_init(ObjectClass *klass, void *data) { BusClass *k = BUS_CLASS(klass); k->print_dev = pcibus_dev_print; k->get_dev_path = pcibus_get_dev_path; k->get_fw_dev_path = pcibus_get_fw_dev_path; k->reset = pcibus_reset; } static const TypeInfo pci_bus_info = { .name = TYPE_PCI_BUS, .parent = TYPE_BUS, .instance_size = sizeof(PCIBus), .class_init = pci_bus_class_init, }; static const TypeInfo pcie_bus_info = { .name = TYPE_PCIE_BUS, .parent = TYPE_PCI_BUS, }; static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num); static void pci_update_mappings(PCIDevice *d); static void pci_set_irq(void *opaque, int irq_num, int level); static int pci_add_option_rom(PCIDevice *pdev, bool is_default_rom); static void pci_del_option_rom(PCIDevice *pdev); static uint16_t pci_default_sub_vendor_id = PCI_SUBVENDOR_ID_REDHAT_QUMRANET; static uint16_t pci_default_sub_device_id = PCI_SUBDEVICE_ID_QEMU; static QLIST_HEAD(, PCIHostState) pci_host_bridges; static const VMStateDescription vmstate_pcibus = { .name = "PCIBUS", .version_id = 1, .minimum_version_id = 1, .minimum_version_id_old = 1, .fields = (VMStateField []) { VMSTATE_INT32_EQUAL(nirq, PCIBus), VMSTATE_VARRAY_INT32(irq_count, PCIBus, nirq, 0, vmstate_info_int32, int32_t), VMSTATE_END_OF_LIST() } }; static int pci_bar(PCIDevice *d, int reg) { uint8_t type; if (reg != PCI_ROM_SLOT) return PCI_BASE_ADDRESS_0 + reg * 4; type = d->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION; return type == PCI_HEADER_TYPE_BRIDGE ? PCI_ROM_ADDRESS1 : PCI_ROM_ADDRESS; } static inline int pci_irq_state(PCIDevice *d, int irq_num) { return (d->irq_state >> irq_num) & 0x1; } static inline void pci_set_irq_state(PCIDevice *d, int irq_num, int level) { d->irq_state &= ~(0x1 << irq_num); d->irq_state |= level << irq_num; } static void pci_change_irq_level(PCIDevice *pci_dev, int irq_num, int change) { PCIBus *bus; for (;;) { bus = pci_dev->bus; irq_num = bus->map_irq(pci_dev, irq_num); if (bus->set_irq) break; pci_dev = bus->parent_dev; } bus->irq_count[irq_num] += change; bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0); } int pci_bus_get_irq_level(PCIBus *bus, int irq_num) { assert(irq_num >= 0); assert(irq_num < bus->nirq); return !!bus->irq_count[irq_num]; } /* Update interrupt status bit in config space on interrupt * state change. */ static void pci_update_irq_status(PCIDevice *dev) { if (dev->irq_state) { dev->config[PCI_STATUS] |= PCI_STATUS_INTERRUPT; } else { dev->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT; } } void pci_device_deassert_intx(PCIDevice *dev) { int i; for (i = 0; i < PCI_NUM_PINS; ++i) { qemu_set_irq(dev->irq[i], 0); } } /* * This function is called on #RST and FLR. * FLR if PCI_EXP_DEVCTL_BCR_FLR is set */ void pci_device_reset(PCIDevice *dev) { int r; qdev_reset_all(&dev->qdev); dev->irq_state = 0; pci_update_irq_status(dev); pci_device_deassert_intx(dev); /* Clear all writable bits */ pci_word_test_and_clear_mask(dev->config + PCI_COMMAND, pci_get_word(dev->wmask + PCI_COMMAND) | pci_get_word(dev->w1cmask + PCI_COMMAND)); pci_word_test_and_clear_mask(dev->config + PCI_STATUS, pci_get_word(dev->wmask + PCI_STATUS) | pci_get_word(dev->w1cmask + PCI_STATUS)); dev->config[PCI_CACHE_LINE_SIZE] = 0x0; dev->config[PCI_INTERRUPT_LINE] = 0x0; for (r = 0; r < PCI_NUM_REGIONS; ++r) { PCIIORegion *region = &dev->io_regions[r]; if (!region->size) { continue; } if (!(region->type & PCI_BASE_ADDRESS_SPACE_IO) && region->type & PCI_BASE_ADDRESS_MEM_TYPE_64) { pci_set_quad(dev->config + pci_bar(dev, r), region->type); } else { pci_set_long(dev->config + pci_bar(dev, r), region->type); } } pci_update_mappings(dev); msi_reset(dev); msix_reset(dev); } /* * Trigger pci bus reset under a given bus. * To be called on RST# assert. */ void pci_bus_reset(PCIBus *bus) { int i; for (i = 0; i < bus->nirq; i++) { bus->irq_count[i] = 0; } for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) { if (bus->devices[i]) { pci_device_reset(bus->devices[i]); } } } static int pcibus_reset(BusState *qbus) { pci_bus_reset(DO_UPCAST(PCIBus, qbus, qbus)); /* topology traverse is done by pci_bus_reset(). Tell qbus/qdev walker not to traverse the tree */ return 1; } static void pci_host_bus_register(PCIBus *bus, DeviceState *parent) { PCIHostState *host_bridge = PCI_HOST_BRIDGE(parent); QLIST_INSERT_HEAD(&pci_host_bridges, host_bridge, next); } PCIBus *pci_find_primary_bus(void) { PCIBus *primary_bus = NULL; PCIHostState *host; QLIST_FOREACH(host, &pci_host_bridges, next) { if (primary_bus) { /* We have multiple root buses, refuse to select a primary */ return NULL; } primary_bus = host->bus; } return primary_bus; } PCIBus *pci_device_root_bus(const PCIDevice *d) { PCIBus *bus = d->bus; while ((d = bus->parent_dev) != NULL) { bus = d->bus; } return bus; } const char *pci_root_bus_path(PCIDevice *dev) { PCIBus *rootbus = pci_device_root_bus(dev); PCIHostState *host_bridge = PCI_HOST_BRIDGE(rootbus->qbus.parent); PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_GET_CLASS(host_bridge); assert(!rootbus->parent_dev); assert(host_bridge->bus == rootbus); if (hc->root_bus_path) { return (*hc->root_bus_path)(host_bridge, rootbus); } return rootbus->qbus.name; } static void pci_bus_init(PCIBus *bus, DeviceState *parent, const char *name, MemoryRegion *address_space_mem, MemoryRegion *address_space_io, uint8_t devfn_min) { assert(PCI_FUNC(devfn_min) == 0); bus->devfn_min = devfn_min; bus->address_space_mem = address_space_mem; bus->address_space_io = address_space_io; /* host bridge */ QLIST_INIT(&bus->child); pci_host_bus_register(bus, parent); vmstate_register(NULL, -1, &vmstate_pcibus, bus); } bool pci_bus_is_express(PCIBus *bus) { return object_dynamic_cast(OBJECT(bus), TYPE_PCIE_BUS); } bool pci_bus_is_root(PCIBus *bus) { return !bus->parent_dev; } void pci_bus_new_inplace(PCIBus *bus, DeviceState *parent, const char *name, MemoryRegion *address_space_mem, MemoryRegion *address_space_io, uint8_t devfn_min, const char *typename) { qbus_create_inplace(bus, typename, parent, name); pci_bus_init(bus, parent, name, address_space_mem, address_space_io, devfn_min); } PCIBus *pci_bus_new(DeviceState *parent, const char *name, MemoryRegion *address_space_mem, MemoryRegion *address_space_io, uint8_t devfn_min, const char *typename) { PCIBus *bus; bus = PCI_BUS(qbus_create(typename, parent, name)); pci_bus_init(bus, parent, name, address_space_mem, address_space_io, devfn_min); return bus; } void pci_bus_irqs(PCIBus *bus, pci_set_irq_fn set_irq, pci_map_irq_fn map_irq, void *irq_opaque, int nirq) { bus->set_irq = set_irq; bus->map_irq = map_irq; bus->irq_opaque = irq_opaque; bus->nirq = nirq; bus->irq_count = g_malloc0(nirq * sizeof(bus->irq_count[0])); } void pci_bus_hotplug(PCIBus *bus, pci_hotplug_fn hotplug, DeviceState *qdev) { bus->qbus.allow_hotplug = 1; bus->hotplug = hotplug; bus->hotplug_qdev = qdev; } PCIBus *pci_register_bus(DeviceState *parent, const char *name, pci_set_irq_fn set_irq, pci_map_irq_fn map_irq, void *irq_opaque, MemoryRegion *address_space_mem, MemoryRegion *address_space_io, uint8_t devfn_min, int nirq, const char *typename) { PCIBus *bus; bus = pci_bus_new(parent, name, address_space_mem, address_space_io, devfn_min, typename); pci_bus_irqs(bus, set_irq, map_irq, irq_opaque, nirq); return bus; } int pci_bus_num(PCIBus *s) { if (pci_bus_is_root(s)) return 0; /* pci host bridge */ return s->parent_dev->config[PCI_SECONDARY_BUS]; } static int get_pci_config_device(QEMUFile *f, void *pv, size_t size) { PCIDevice *s = container_of(pv, PCIDevice, config); PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(s); uint8_t *config; int i; assert(size == pci_config_size(s)); config = g_malloc(size); qemu_get_buffer(f, config, size); for (i = 0; i < size; ++i) { if ((config[i] ^ s->config[i]) & s->cmask[i] & ~s->wmask[i] & ~s->w1cmask[i]) { g_free(config); return -EINVAL; } } memcpy(s->config, config, size); pci_update_mappings(s); if (pc->is_bridge) { PCIBridge *b = PCI_BRIDGE(s); pci_bridge_update_mappings(b); } memory_region_set_enabled(&s->bus_master_enable_region, pci_get_word(s->config + PCI_COMMAND) & PCI_COMMAND_MASTER); g_free(config); return 0; } /* just put buffer */ static void put_pci_config_device(QEMUFile *f, void *pv, size_t size) { const uint8_t **v = pv; assert(size == pci_config_size(container_of(pv, PCIDevice, config))); qemu_put_buffer(f, *v, size); } static VMStateInfo vmstate_info_pci_config = { .name = "pci config", .get = get_pci_config_device, .put = put_pci_config_device, }; static int get_pci_irq_state(QEMUFile *f, void *pv, size_t size) { PCIDevice *s = container_of(pv, PCIDevice, irq_state); uint32_t irq_state[PCI_NUM_PINS]; int i; for (i = 0; i < PCI_NUM_PINS; ++i) { irq_state[i] = qemu_get_be32(f); if (irq_state[i] != 0x1 && irq_state[i] != 0) { fprintf(stderr, "irq state %d: must be 0 or 1.\n", irq_state[i]); return -EINVAL; } } for (i = 0; i < PCI_NUM_PINS; ++i) { pci_set_irq_state(s, i, irq_state[i]); } return 0; } static void put_pci_irq_state(QEMUFile *f, void *pv, size_t size) { int i; PCIDevice *s = container_of(pv, PCIDevice, irq_state); for (i = 0; i < PCI_NUM_PINS; ++i) { qemu_put_be32(f, pci_irq_state(s, i)); } } static VMStateInfo vmstate_info_pci_irq_state = { .name = "pci irq state", .get = get_pci_irq_state, .put = put_pci_irq_state, }; const VMStateDescription vmstate_pci_device = { .name = "PCIDevice", .version_id = 2, .minimum_version_id = 1, .minimum_version_id_old = 1, .fields = (VMStateField []) { VMSTATE_INT32_LE(version_id, PCIDevice), VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0, vmstate_info_pci_config, PCI_CONFIG_SPACE_SIZE), VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2, vmstate_info_pci_irq_state, PCI_NUM_PINS * sizeof(int32_t)), VMSTATE_END_OF_LIST() } }; const VMStateDescription vmstate_pcie_device = { .name = "PCIEDevice", .version_id = 2, .minimum_version_id = 1, .minimum_version_id_old = 1, .fields = (VMStateField []) { VMSTATE_INT32_LE(version_id, PCIDevice), VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0, vmstate_info_pci_config, PCIE_CONFIG_SPACE_SIZE), VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2, vmstate_info_pci_irq_state, PCI_NUM_PINS * sizeof(int32_t)), VMSTATE_END_OF_LIST() } }; static inline const VMStateDescription *pci_get_vmstate(PCIDevice *s) { return pci_is_express(s) ? &vmstate_pcie_device : &vmstate_pci_device; } void pci_device_save(PCIDevice *s, QEMUFile *f) { /* Clear interrupt status bit: it is implicit * in irq_state which we are saving. * This makes us compatible with old devices * which never set or clear this bit. */ s->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT; vmstate_save_state(f, pci_get_vmstate(s), s); /* Restore the interrupt status bit. */ pci_update_irq_status(s); } int pci_device_load(PCIDevice *s, QEMUFile *f) { int ret; ret = vmstate_load_state(f, pci_get_vmstate(s), s, s->version_id); /* Restore the interrupt status bit. */ pci_update_irq_status(s); return ret; } static void pci_set_default_subsystem_id(PCIDevice *pci_dev) { pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID, pci_default_sub_vendor_id); pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID, pci_default_sub_device_id); } /* * Parse [[:]:], return -1 on error if funcp == NULL * [[:]:]., return -1 on error */ int pci_parse_devaddr(const char *addr, int *domp, int *busp, unsigned int *slotp, unsigned int *funcp) { const char *p; char *e; unsigned long val; unsigned long dom = 0, bus = 0; unsigned int slot = 0; unsigned int func = 0; p = addr; val = strtoul(p, &e, 16); if (e == p) return -1; if (*e == ':') { bus = val; p = e + 1; val = strtoul(p, &e, 16); if (e == p) return -1; if (*e == ':') { dom = bus; bus = val; p = e + 1; val = strtoul(p, &e, 16); if (e == p) return -1; } } slot = val; if (funcp != NULL) { if (*e != '.') return -1; p = e + 1; val = strtoul(p, &e, 16); if (e == p) return -1; func = val; } /* if funcp == NULL func is 0 */ if (dom > 0xffff || bus > 0xff || slot > 0x1f || func > 7) return -1; if (*e) return -1; *domp = dom; *busp = bus; *slotp = slot; if (funcp != NULL) *funcp = func; return 0; } PCIBus *pci_get_bus_devfn(int *devfnp, PCIBus *root, const char *devaddr) { int dom, bus; unsigned slot; assert(!root->parent_dev); if (!root) { fprintf(stderr, "No primary PCI bus\n"); return NULL; } if (!devaddr) { *devfnp = -1; return pci_find_bus_nr(root, 0); } if (pci_parse_devaddr(devaddr, &dom, &bus, &slot, NULL) < 0) { return NULL; } if (dom != 0) { fprintf(stderr, "No support for non-zero PCI domains\n"); return NULL; } *devfnp = PCI_DEVFN(slot, 0); return pci_find_bus_nr(root, bus); } static void pci_init_cmask(PCIDevice *dev) { pci_set_word(dev->cmask + PCI_VENDOR_ID, 0xffff); pci_set_word(dev->cmask + PCI_DEVICE_ID, 0xffff); dev->cmask[PCI_STATUS] = PCI_STATUS_CAP_LIST; dev->cmask[PCI_REVISION_ID] = 0xff; dev->cmask[PCI_CLASS_PROG] = 0xff; pci_set_word(dev->cmask + PCI_CLASS_DEVICE, 0xffff); dev->cmask[PCI_HEADER_TYPE] = 0xff; dev->cmask[PCI_CAPABILITY_LIST] = 0xff; } static void pci_init_wmask(PCIDevice *dev) { int config_size = pci_config_size(dev); dev->wmask[PCI_CACHE_LINE_SIZE] = 0xff; dev->wmask[PCI_INTERRUPT_LINE] = 0xff; pci_set_word(dev->wmask + PCI_COMMAND, PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_INTX_DISABLE); if (dev->cap_present & QEMU_PCI_CAP_SERR) { pci_word_test_and_set_mask(dev->wmask + PCI_COMMAND, PCI_COMMAND_SERR); } memset(dev->wmask + PCI_CONFIG_HEADER_SIZE, 0xff, config_size - PCI_CONFIG_HEADER_SIZE); } static void pci_init_w1cmask(PCIDevice *dev) { /* * Note: It's okay to set w1cmask even for readonly bits as * long as their value is hardwired to 0. */ pci_set_word(dev->w1cmask + PCI_STATUS, PCI_STATUS_PARITY | PCI_STATUS_SIG_TARGET_ABORT | PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_REC_MASTER_ABORT | PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY); } static void pci_init_mask_bridge(PCIDevice *d) { /* PCI_PRIMARY_BUS, PCI_SECONDARY_BUS, PCI_SUBORDINATE_BUS and PCI_SEC_LETENCY_TIMER */ memset(d->wmask + PCI_PRIMARY_BUS, 0xff, 4); /* base and limit */ d->wmask[PCI_IO_BASE] = PCI_IO_RANGE_MASK & 0xff; d->wmask[PCI_IO_LIMIT] = PCI_IO_RANGE_MASK & 0xff; pci_set_word(d->wmask + PCI_MEMORY_BASE, PCI_MEMORY_RANGE_MASK & 0xffff); pci_set_word(d->wmask + PCI_MEMORY_LIMIT, PCI_MEMORY_RANGE_MASK & 0xffff); pci_set_word(d->wmask + PCI_PREF_MEMORY_BASE, PCI_PREF_RANGE_MASK & 0xffff); pci_set_word(d->wmask + PCI_PREF_MEMORY_LIMIT, PCI_PREF_RANGE_MASK & 0xffff); /* PCI_PREF_BASE_UPPER32 and PCI_PREF_LIMIT_UPPER32 */ memset(d->wmask + PCI_PREF_BASE_UPPER32, 0xff, 8); /* Supported memory and i/o types */ d->config[PCI_IO_BASE] |= PCI_IO_RANGE_TYPE_16; d->config[PCI_IO_LIMIT] |= PCI_IO_RANGE_TYPE_16; pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_BASE, PCI_PREF_RANGE_TYPE_64); pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_LIMIT, PCI_PREF_RANGE_TYPE_64); /* * TODO: Bridges default to 10-bit VGA decoding but we currently only * implement 16-bit decoding (no alias support). */ pci_set_word(d->wmask + PCI_BRIDGE_CONTROL, PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR | PCI_BRIDGE_CTL_ISA | PCI_BRIDGE_CTL_VGA | PCI_BRIDGE_CTL_VGA_16BIT | PCI_BRIDGE_CTL_MASTER_ABORT | PCI_BRIDGE_CTL_BUS_RESET | PCI_BRIDGE_CTL_FAST_BACK | PCI_BRIDGE_CTL_DISCARD | PCI_BRIDGE_CTL_SEC_DISCARD | PCI_BRIDGE_CTL_DISCARD_SERR); /* Below does not do anything as we never set this bit, put here for * completeness. */ pci_set_word(d->w1cmask + PCI_BRIDGE_CONTROL, PCI_BRIDGE_CTL_DISCARD_STATUS); d->cmask[PCI_IO_BASE] |= PCI_IO_RANGE_TYPE_MASK; d->cmask[PCI_IO_LIMIT] |= PCI_IO_RANGE_TYPE_MASK; pci_word_test_and_set_mask(d->cmask + PCI_PREF_MEMORY_BASE, PCI_PREF_RANGE_TYPE_MASK); pci_word_test_and_set_mask(d->cmask + PCI_PREF_MEMORY_LIMIT, PCI_PREF_RANGE_TYPE_MASK); } static int pci_init_multifunction(PCIBus *bus, PCIDevice *dev) { uint8_t slot = PCI_SLOT(dev->devfn); uint8_t func; if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) { dev->config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION; } /* * multifunction bit is interpreted in two ways as follows. * - all functions must set the bit to 1. * Example: Intel X53 * - function 0 must set the bit, but the rest function (> 0) * is allowed to leave the bit to 0. * Example: PIIX3(also in qemu), PIIX4(also in qemu), ICH10, * * So OS (at least Linux) checks the bit of only function 0, * and doesn't see the bit of function > 0. * * The below check allows both interpretation. */ if (PCI_FUNC(dev->devfn)) { PCIDevice *f0 = bus->devices[PCI_DEVFN(slot, 0)]; if (f0 && !(f0->cap_present & QEMU_PCI_CAP_MULTIFUNCTION)) { /* function 0 should set multifunction bit */ error_report("PCI: single function device can't be populated " "in function %x.%x", slot, PCI_FUNC(dev->devfn)); return -1; } return 0; } if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) { return 0; } /* function 0 indicates single function, so function > 0 must be NULL */ for (func = 1; func < PCI_FUNC_MAX; ++func) { if (bus->devices[PCI_DEVFN(slot, func)]) { error_report("PCI: %x.0 indicates single function, " "but %x.%x is already populated.", slot, slot, func); return -1; } } return 0; } static void pci_config_alloc(PCIDevice *pci_dev) { int config_size = pci_config_size(pci_dev); pci_dev->config = g_malloc0(config_size); pci_dev->cmask = g_malloc0(config_size); pci_dev->wmask = g_malloc0(config_size); pci_dev->w1cmask = g_malloc0(config_size); pci_dev->used = g_malloc0(config_size); } static void pci_config_free(PCIDevice *pci_dev) { g_free(pci_dev->config); g_free(pci_dev->cmask); g_free(pci_dev->wmask); g_free(pci_dev->w1cmask); g_free(pci_dev->used); } /* -1 for devfn means auto assign */ static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus, const char *name, int devfn) { PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev); PCIConfigReadFunc *config_read = pc->config_read; PCIConfigWriteFunc *config_write = pc->config_write; AddressSpace *dma_as; if (devfn < 0) { for(devfn = bus->devfn_min ; devfn < ARRAY_SIZE(bus->devices); devfn += PCI_FUNC_MAX) { if (!bus->devices[devfn]) goto found; } error_report("PCI: no slot/function available for %s, all in use", name); return NULL; found: ; } else if (bus->devices[devfn]) { error_report("PCI: slot %d function %d not available for %s, in use by %s", PCI_SLOT(devfn), PCI_FUNC(devfn), name, bus->devices[devfn]->name); return NULL; } pci_dev->bus = bus; if (bus->iommu_fn) { dma_as = bus->iommu_fn(bus, bus->iommu_opaque, devfn); } else { /* FIXME: inherit memory region from bus creator */ dma_as = &address_space_memory; } memory_region_init_alias(&pci_dev->bus_master_enable_region, OBJECT(pci_dev), "bus master", dma_as->root, 0, memory_region_size(dma_as->root)); memory_region_set_enabled(&pci_dev->bus_master_enable_region, false); address_space_init(&pci_dev->bus_master_as, &pci_dev->bus_master_enable_region, name); pci_dev->devfn = devfn; pstrcpy(pci_dev->name, sizeof(pci_dev->name), name); pci_dev->irq_state = 0; pci_config_alloc(pci_dev); pci_config_set_vendor_id(pci_dev->config, pc->vendor_id); pci_config_set_device_id(pci_dev->config, pc->device_id); pci_config_set_revision(pci_dev->config, pc->revision); pci_config_set_class(pci_dev->config, pc->class_id); if (!pc->is_bridge) { if (pc->subsystem_vendor_id || pc->subsystem_id) { pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID, pc->subsystem_vendor_id); pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID, pc->subsystem_id); } else { pci_set_default_subsystem_id(pci_dev); } } else { /* subsystem_vendor_id/subsystem_id are only for header type 0 */ assert(!pc->subsystem_vendor_id); assert(!pc->subsystem_id); } pci_init_cmask(pci_dev); pci_init_wmask(pci_dev); pci_init_w1cmask(pci_dev); if (pc->is_bridge) { pci_init_mask_bridge(pci_dev); } if (pci_init_multifunction(bus, pci_dev)) { pci_config_free(pci_dev); return NULL; } if (!config_read) config_read = pci_default_read_config; if (!config_write) config_write = pci_default_write_config; pci_dev->config_read = config_read; pci_dev->config_write = config_write; bus->devices[devfn] = pci_dev; pci_dev->irq = qemu_allocate_irqs(pci_set_irq, pci_dev, PCI_NUM_PINS); pci_dev->version_id = 2; /* Current pci device vmstate version */ return pci_dev; } static void do_pci_unregister_device(PCIDevice *pci_dev) { qemu_free_irqs(pci_dev->irq); pci_dev->bus->devices[pci_dev->devfn] = NULL; pci_config_free(pci_dev); address_space_destroy(&pci_dev->bus_master_as); memory_region_destroy(&pci_dev->bus_master_enable_region); } static void pci_unregister_io_regions(PCIDevice *pci_dev) { PCIIORegion *r; int i; for(i = 0; i < PCI_NUM_REGIONS; i++) { r = &pci_dev->io_regions[i]; if (!r->size || r->addr == PCI_BAR_UNMAPPED) continue; memory_region_del_subregion(r->address_space, r->memory); } pci_unregister_vga(pci_dev); } static int pci_unregister_device(DeviceState *dev) { PCIDevice *pci_dev = PCI_DEVICE(dev); PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev); pci_unregister_io_regions(pci_dev); pci_del_option_rom(pci_dev); if (pc->exit) { pc->exit(pci_dev); } do_pci_unregister_device(pci_dev); return 0; } void pci_register_bar(PCIDevice *pci_dev, int region_num, uint8_t type, MemoryRegion *memory) { PCIIORegion *r; uint32_t addr; uint64_t wmask; pcibus_t size = memory_region_size(memory); assert(region_num >= 0); assert(region_num < PCI_NUM_REGIONS); if (size & (size-1)) { fprintf(stderr, "ERROR: PCI region size must be pow2 " "type=0x%x, size=0x%"FMT_PCIBUS"\n", type, size); exit(1); } r = &pci_dev->io_regions[region_num]; r->addr = PCI_BAR_UNMAPPED; r->size = size; r->type = type; r->memory = NULL; wmask = ~(size - 1); addr = pci_bar(pci_dev, region_num); if (region_num == PCI_ROM_SLOT) { /* ROM enable bit is writable */ wmask |= PCI_ROM_ADDRESS_ENABLE; } pci_set_long(pci_dev->config + addr, type); if (!(r->type & PCI_BASE_ADDRESS_SPACE_IO) && r->type & PCI_BASE_ADDRESS_MEM_TYPE_64) { pci_set_quad(pci_dev->wmask + addr, wmask); pci_set_quad(pci_dev->cmask + addr, ~0ULL); } else { pci_set_long(pci_dev->wmask + addr, wmask & 0xffffffff); pci_set_long(pci_dev->cmask + addr, 0xffffffff); } pci_dev->io_regions[region_num].memory = memory; pci_dev->io_regions[region_num].address_space = type & PCI_BASE_ADDRESS_SPACE_IO ? pci_dev->bus->address_space_io : pci_dev->bus->address_space_mem; } static void pci_update_vga(PCIDevice *pci_dev) { uint16_t cmd; if (!pci_dev->has_vga) { return; } cmd = pci_get_word(pci_dev->config + PCI_COMMAND); memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_MEM], cmd & PCI_COMMAND_MEMORY); memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO], cmd & PCI_COMMAND_IO); memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI], cmd & PCI_COMMAND_IO); } void pci_register_vga(PCIDevice *pci_dev, MemoryRegion *mem, MemoryRegion *io_lo, MemoryRegion *io_hi) { assert(!pci_dev->has_vga); assert(memory_region_size(mem) == QEMU_PCI_VGA_MEM_SIZE); pci_dev->vga_regions[QEMU_PCI_VGA_MEM] = mem; memory_region_add_subregion_overlap(pci_dev->bus->address_space_mem, QEMU_PCI_VGA_MEM_BASE, mem, 1); assert(memory_region_size(io_lo) == QEMU_PCI_VGA_IO_LO_SIZE); pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO] = io_lo; memory_region_add_subregion_overlap(pci_dev->bus->address_space_io, QEMU_PCI_VGA_IO_LO_BASE, io_lo, 1); assert(memory_region_size(io_hi) == QEMU_PCI_VGA_IO_HI_SIZE); pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI] = io_hi; memory_region_add_subregion_overlap(pci_dev->bus->address_space_io, QEMU_PCI_VGA_IO_HI_BASE, io_hi, 1); pci_dev->has_vga = true; pci_update_vga(pci_dev); } void pci_unregister_vga(PCIDevice *pci_dev) { if (!pci_dev->has_vga) { return; } memory_region_del_subregion(pci_dev->bus->address_space_mem, pci_dev->vga_regions[QEMU_PCI_VGA_MEM]); memory_region_del_subregion(pci_dev->bus->address_space_io, pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO]); memory_region_del_subregion(pci_dev->bus->address_space_io, pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI]); pci_dev->has_vga = false; } pcibus_t pci_get_bar_addr(PCIDevice *pci_dev, int region_num) { return pci_dev->io_regions[region_num].addr; } static pcibus_t pci_bar_address(PCIDevice *d, int reg, uint8_t type, pcibus_t size) { pcibus_t new_addr, last_addr; int bar = pci_bar(d, reg); uint16_t cmd = pci_get_word(d->config + PCI_COMMAND); if (type & PCI_BASE_ADDRESS_SPACE_IO) { if (!(cmd & PCI_COMMAND_IO)) { return PCI_BAR_UNMAPPED; } new_addr = pci_get_long(d->config + bar) & ~(size - 1); last_addr = new_addr + size - 1; /* NOTE: we have only 64K ioports on PC */ if (last_addr <= new_addr || new_addr == 0 || last_addr > UINT16_MAX) { return PCI_BAR_UNMAPPED; } return new_addr; } if (!(cmd & PCI_COMMAND_MEMORY)) { return PCI_BAR_UNMAPPED; } if (type & PCI_BASE_ADDRESS_MEM_TYPE_64) { new_addr = pci_get_quad(d->config + bar); } else { new_addr = pci_get_long(d->config + bar); } /* the ROM slot has a specific enable bit */ if (reg == PCI_ROM_SLOT && !(new_addr & PCI_ROM_ADDRESS_ENABLE)) { return PCI_BAR_UNMAPPED; } new_addr &= ~(size - 1); last_addr = new_addr + size - 1; /* NOTE: we do not support wrapping */ /* XXX: as we cannot support really dynamic mappings, we handle specific values as invalid mappings. */ if (last_addr <= new_addr || new_addr == 0 || last_addr == PCI_BAR_UNMAPPED) { return PCI_BAR_UNMAPPED; } /* Now pcibus_t is 64bit. * Check if 32 bit BAR wraps around explicitly. * Without this, PC ide doesn't work well. * TODO: remove this work around. */ if (!(type & PCI_BASE_ADDRESS_MEM_TYPE_64) && last_addr >= UINT32_MAX) { return PCI_BAR_UNMAPPED; } /* * OS is allowed to set BAR beyond its addressable * bits. For example, 32 bit OS can set 64bit bar * to >4G. Check it. TODO: we might need to support * it in the future for e.g. PAE. */ if (last_addr >= HWADDR_MAX) { return PCI_BAR_UNMAPPED; } return new_addr; } static void pci_update_mappings(PCIDevice *d) { PCIIORegion *r; int i; pcibus_t new_addr; for(i = 0; i < PCI_NUM_REGIONS; i++) { r = &d->io_regions[i]; /* this region isn't registered */ if (!r->size) continue; new_addr = pci_bar_address(d, i, r->type, r->size); /* This bar isn't changed */ if (new_addr == r->addr) continue; /* now do the real mapping */ if (r->addr != PCI_BAR_UNMAPPED) { memory_region_del_subregion(r->address_space, r->memory); } r->addr = new_addr; if (r->addr != PCI_BAR_UNMAPPED) { memory_region_add_subregion_overlap(r->address_space, r->addr, r->memory, 1); } } pci_update_vga(d); } static inline int pci_irq_disabled(PCIDevice *d) { return pci_get_word(d->config + PCI_COMMAND) & PCI_COMMAND_INTX_DISABLE; } /* Called after interrupt disabled field update in config space, * assert/deassert interrupts if necessary. * Gets original interrupt disable bit value (before update). */ static void pci_update_irq_disabled(PCIDevice *d, int was_irq_disabled) { int i, disabled = pci_irq_disabled(d); if (disabled == was_irq_disabled) return; for (i = 0; i < PCI_NUM_PINS; ++i) { int state = pci_irq_state(d, i); pci_change_irq_level(d, i, disabled ? -state : state); } } uint32_t pci_default_read_config(PCIDevice *d, uint32_t address, int len) { uint32_t val = 0; memcpy(&val, d->config + address, len); return le32_to_cpu(val); } void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l) { int i, was_irq_disabled = pci_irq_disabled(d); for (i = 0; i < l; val >>= 8, ++i) { uint8_t wmask = d->wmask[addr + i]; uint8_t w1cmask = d->w1cmask[addr + i]; assert(!(wmask & w1cmask)); d->config[addr + i] = (d->config[addr + i] & ~wmask) | (val & wmask); d->config[addr + i] &= ~(val & w1cmask); /* W1C: Write 1 to Clear */ } if (ranges_overlap(addr, l, PCI_BASE_ADDRESS_0, 24) || ranges_overlap(addr, l, PCI_ROM_ADDRESS, 4) || ranges_overlap(addr, l, PCI_ROM_ADDRESS1, 4) || range_covers_byte(addr, l, PCI_COMMAND)) pci_update_mappings(d); if (range_covers_byte(addr, l, PCI_COMMAND)) { pci_update_irq_disabled(d, was_irq_disabled); memory_region_set_enabled(&d->bus_master_enable_region, pci_get_word(d->config + PCI_COMMAND) & PCI_COMMAND_MASTER); } msi_write_config(d, addr, val, l); msix_write_config(d, addr, val, l); } /***********************************************************/ /* generic PCI irq support */ /* 0 <= irq_num <= 3. level must be 0 or 1 */ static void pci_set_irq(void *opaque, int irq_num, int level) { PCIDevice *pci_dev = opaque; int change; change = level - pci_irq_state(pci_dev, irq_num); if (!change) return; pci_set_irq_state(pci_dev, irq_num, level); pci_update_irq_status(pci_dev); if (pci_irq_disabled(pci_dev)) return; pci_change_irq_level(pci_dev, irq_num, change); } /* Special hooks used by device assignment */ void pci_bus_set_route_irq_fn(PCIBus *bus, pci_route_irq_fn route_intx_to_irq) { assert(pci_bus_is_root(bus)); bus->route_intx_to_irq = route_intx_to_irq; } PCIINTxRoute pci_device_route_intx_to_irq(PCIDevice *dev, int pin) { PCIBus *bus; do { bus = dev->bus; pin = bus->map_irq(dev, pin); dev = bus->parent_dev; } while (dev); if (!bus->route_intx_to_irq) { error_report("PCI: Bug - unimplemented PCI INTx routing (%s)", object_get_typename(OBJECT(bus->qbus.parent))); return (PCIINTxRoute) { PCI_INTX_DISABLED, -1 }; } return bus->route_intx_to_irq(bus->irq_opaque, pin); } bool pci_intx_route_changed(PCIINTxRoute *old, PCIINTxRoute *new) { return old->mode != new->mode || old->irq != new->irq; } void pci_bus_fire_intx_routing_notifier(PCIBus *bus) { PCIDevice *dev; PCIBus *sec; int i; for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) { dev = bus->devices[i]; if (dev && dev->intx_routing_notifier) { dev->intx_routing_notifier(dev); } } QLIST_FOREACH(sec, &bus->child, sibling) { pci_bus_fire_intx_routing_notifier(sec); } } void pci_device_set_intx_routing_notifier(PCIDevice *dev, PCIINTxRoutingNotifier notifier) { dev->intx_routing_notifier = notifier; } /* * PCI-to-PCI bridge specification * 9.1: Interrupt routing. Table 9-1 * * the PCI Express Base Specification, Revision 2.1 * 2.2.8.1: INTx interrutp signaling - Rules * the Implementation Note * Table 2-20 */ /* * 0 <= pin <= 3 0 = INTA, 1 = INTB, 2 = INTC, 3 = INTD * 0-origin unlike PCI interrupt pin register. */ int pci_swizzle_map_irq_fn(PCIDevice *pci_dev, int pin) { return (pin + PCI_SLOT(pci_dev->devfn)) % PCI_NUM_PINS; } /***********************************************************/ /* monitor info on PCI */ typedef struct { uint16_t class; const char *desc; const char *fw_name; uint16_t fw_ign_bits; } pci_class_desc; static const pci_class_desc pci_class_descriptions[] = { { 0x0001, "VGA controller", "display"}, { 0x0100, "SCSI controller", "scsi"}, { 0x0101, "IDE controller", "ide"}, { 0x0102, "Floppy controller", "fdc"}, { 0x0103, "IPI controller", "ipi"}, { 0x0104, "RAID controller", "raid"}, { 0x0106, "SATA controller"}, { 0x0107, "SAS controller"}, { 0x0180, "Storage controller"}, { 0x0200, "Ethernet controller", "ethernet"}, { 0x0201, "Token Ring controller", "token-ring"}, { 0x0202, "FDDI controller", "fddi"}, { 0x0203, "ATM controller", "atm"}, { 0x0280, "Network controller"}, { 0x0300, "VGA controller", "display", 0x00ff}, { 0x0301, "XGA controller"}, { 0x0302, "3D controller"}, { 0x0380, "Display controller"}, { 0x0400, "Video controller", "video"}, { 0x0401, "Audio controller", "sound"}, { 0x0402, "Phone"}, { 0x0403, "Audio controller", "sound"}, { 0x0480, "Multimedia controller"}, { 0x0500, "RAM controller", "memory"}, { 0x0501, "Flash controller", "flash"}, { 0x0580, "Memory controller"}, { 0x0600, "Host bridge", "host"}, { 0x0601, "ISA bridge", "isa"}, { 0x0602, "EISA bridge", "eisa"}, { 0x0603, "MC bridge", "mca"}, { 0x0604, "PCI bridge", "pci"}, { 0x0605, "PCMCIA bridge", "pcmcia"}, { 0x0606, "NUBUS bridge", "nubus"}, { 0x0607, "CARDBUS bridge", "cardbus"}, { 0x0608, "RACEWAY bridge"}, { 0x0680, "Bridge"}, { 0x0700, "Serial port", "serial"}, { 0x0701, "Parallel port", "parallel"}, { 0x0800, "Interrupt controller", "interrupt-controller"}, { 0x0801, "DMA controller", "dma-controller"}, { 0x0802, "Timer", "timer"}, { 0x0803, "RTC", "rtc"}, { 0x0900, "Keyboard", "keyboard"}, { 0x0901, "Pen", "pen"}, { 0x0902, "Mouse", "mouse"}, { 0x0A00, "Dock station", "dock", 0x00ff}, { 0x0B00, "i386 cpu", "cpu", 0x00ff}, { 0x0c00, "Fireware contorller", "fireware"}, { 0x0c01, "Access bus controller", "access-bus"}, { 0x0c02, "SSA controller", "ssa"}, { 0x0c03, "USB controller", "usb"}, { 0x0c04, "Fibre channel controller", "fibre-channel"}, { 0x0c05, "SMBus"}, { 0, NULL} }; static void pci_for_each_device_under_bus(PCIBus *bus, void (*fn)(PCIBus *b, PCIDevice *d, void *opaque), void *opaque) { PCIDevice *d; int devfn; for(devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { d = bus->devices[devfn]; if (d) { fn(bus, d, opaque); } } } void pci_for_each_device(PCIBus *bus, int bus_num, void (*fn)(PCIBus *b, PCIDevice *d, void *opaque), void *opaque) { bus = pci_find_bus_nr(bus, bus_num); if (bus) { pci_for_each_device_under_bus(bus, fn, opaque); } } static const pci_class_desc *get_class_desc(int class) { const pci_class_desc *desc; desc = pci_class_descriptions; while (desc->desc && class != desc->class) { desc++; } return desc; } static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num); static PciMemoryRegionList *qmp_query_pci_regions(const PCIDevice *dev) { PciMemoryRegionList *head = NULL, *cur_item = NULL; int i; for (i = 0; i < PCI_NUM_REGIONS; i++) { const PCIIORegion *r = &dev->io_regions[i]; PciMemoryRegionList *region; if (!r->size) { continue; } region = g_malloc0(sizeof(*region)); region->value = g_malloc0(sizeof(*region->value)); if (r->type & PCI_BASE_ADDRESS_SPACE_IO) { region->value->type = g_strdup("io"); } else { region->value->type = g_strdup("memory"); region->value->has_prefetch = true; region->value->prefetch = !!(r->type & PCI_BASE_ADDRESS_MEM_PREFETCH); region->value->has_mem_type_64 = true; region->value->mem_type_64 = !!(r->type & PCI_BASE_ADDRESS_MEM_TYPE_64); } region->value->bar = i; region->value->address = r->addr; region->value->size = r->size; /* XXX: waiting for the qapi to support GSList */ if (!cur_item) { head = cur_item = region; } else { cur_item->next = region; cur_item = region; } } return head; } static PciBridgeInfo *qmp_query_pci_bridge(PCIDevice *dev, PCIBus *bus, int bus_num) { PciBridgeInfo *info; info = g_malloc0(sizeof(*info)); info->bus.number = dev->config[PCI_PRIMARY_BUS]; info->bus.secondary = dev->config[PCI_SECONDARY_BUS]; info->bus.subordinate = dev->config[PCI_SUBORDINATE_BUS]; info->bus.io_range = g_malloc0(sizeof(*info->bus.io_range)); info->bus.io_range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_IO); info->bus.io_range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_IO); info->bus.memory_range = g_malloc0(sizeof(*info->bus.memory_range)); info->bus.memory_range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_MEMORY); info->bus.memory_range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_MEMORY); info->bus.prefetchable_range = g_malloc0(sizeof(*info->bus.prefetchable_range)); info->bus.prefetchable_range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_MEM_PREFETCH); info->bus.prefetchable_range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_MEM_PREFETCH); if (dev->config[PCI_SECONDARY_BUS] != 0) { PCIBus *child_bus = pci_find_bus_nr(bus, dev->config[PCI_SECONDARY_BUS]); if (child_bus) { info->has_devices = true; info->devices = qmp_query_pci_devices(child_bus, dev->config[PCI_SECONDARY_BUS]); } } return info; } static PciDeviceInfo *qmp_query_pci_device(PCIDevice *dev, PCIBus *bus, int bus_num) { const pci_class_desc *desc; PciDeviceInfo *info; uint8_t type; int class; info = g_malloc0(sizeof(*info)); info->bus = bus_num; info->slot = PCI_SLOT(dev->devfn); info->function = PCI_FUNC(dev->devfn); class = pci_get_word(dev->config + PCI_CLASS_DEVICE); info->class_info.class = class; desc = get_class_desc(class); if (desc->desc) { info->class_info.has_desc = true; info->class_info.desc = g_strdup(desc->desc); } info->id.vendor = pci_get_word(dev->config + PCI_VENDOR_ID); info->id.device = pci_get_word(dev->config + PCI_DEVICE_ID); info->regions = qmp_query_pci_regions(dev); info->qdev_id = g_strdup(dev->qdev.id ? dev->qdev.id : ""); if (dev->config[PCI_INTERRUPT_PIN] != 0) { info->has_irq = true; info->irq = dev->config[PCI_INTERRUPT_LINE]; } type = dev->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION; if (type == PCI_HEADER_TYPE_BRIDGE) { info->has_pci_bridge = true; info->pci_bridge = qmp_query_pci_bridge(dev, bus, bus_num); } return info; } static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num) { PciDeviceInfoList *info, *head = NULL, *cur_item = NULL; PCIDevice *dev; int devfn; for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { dev = bus->devices[devfn]; if (dev) { info = g_malloc0(sizeof(*info)); info->value = qmp_query_pci_device(dev, bus, bus_num); /* XXX: waiting for the qapi to support GSList */ if (!cur_item) { head = cur_item = info; } else { cur_item->next = info; cur_item = info; } } } return head; } static PciInfo *qmp_query_pci_bus(PCIBus *bus, int bus_num) { PciInfo *info = NULL; bus = pci_find_bus_nr(bus, bus_num); if (bus) { info = g_malloc0(sizeof(*info)); info->bus = bus_num; info->devices = qmp_query_pci_devices(bus, bus_num); } return info; } PciInfoList *qmp_query_pci(Error **errp) { PciInfoList *info, *head = NULL, *cur_item = NULL; PCIHostState *host_bridge; QLIST_FOREACH(host_bridge, &pci_host_bridges, next) { info = g_malloc0(sizeof(*info)); info->value = qmp_query_pci_bus(host_bridge->bus, 0); /* XXX: waiting for the qapi to support GSList */ if (!cur_item) { head = cur_item = info; } else { cur_item->next = info; cur_item = info; } } return head; } static const char * const pci_nic_models[] = { "ne2k_pci", "i82551", "i82557b", "i82559er", "rtl8139", "e1000", "pcnet", "virtio", NULL }; static const char * const pci_nic_names[] = { "ne2k_pci", "i82551", "i82557b", "i82559er", "rtl8139", "e1000", "pcnet", "virtio-net-pci", NULL }; /* Initialize a PCI NIC. */ /* FIXME callers should check for failure, but don't */ PCIDevice *pci_nic_init(NICInfo *nd, PCIBus *rootbus, const char *default_model, const char *default_devaddr) { const char *devaddr = nd->devaddr ? nd->devaddr : default_devaddr; PCIBus *bus; int devfn; PCIDevice *pci_dev; DeviceState *dev; int i; i = qemu_find_nic_model(nd, pci_nic_models, default_model); if (i < 0) return NULL; bus = pci_get_bus_devfn(&devfn, rootbus, devaddr); if (!bus) { error_report("Invalid PCI device address %s for device %s", devaddr, pci_nic_names[i]); return NULL; } pci_dev = pci_create(bus, devfn, pci_nic_names[i]); dev = &pci_dev->qdev; qdev_set_nic_properties(dev, nd); if (qdev_init(dev) < 0) return NULL; return pci_dev; } PCIDevice *pci_nic_init_nofail(NICInfo *nd, PCIBus *rootbus, const char *default_model, const char *default_devaddr) { PCIDevice *res; if (qemu_show_nic_models(nd->model, pci_nic_models)) exit(0); res = pci_nic_init(nd, rootbus, default_model, default_devaddr); if (!res) exit(1); return res; } PCIDevice *pci_vga_init(PCIBus *bus) { switch (vga_interface_type) { case VGA_CIRRUS: return pci_create_simple(bus, -1, "cirrus-vga"); case VGA_QXL: return pci_create_simple(bus, -1, "qxl-vga"); case VGA_STD: return pci_create_simple(bus, -1, "VGA"); case VGA_VMWARE: return pci_create_simple(bus, -1, "vmware-svga"); case VGA_NONE: default: /* Other non-PCI types. Checking for unsupported types is already done in vl.c. */ return NULL; } } /* Whether a given bus number is in range of the secondary * bus of the given bridge device. */ static bool pci_secondary_bus_in_range(PCIDevice *dev, int bus_num) { return !(pci_get_word(dev->config + PCI_BRIDGE_CONTROL) & PCI_BRIDGE_CTL_BUS_RESET) /* Don't walk the bus if it's reset. */ && dev->config[PCI_SECONDARY_BUS] < bus_num && bus_num <= dev->config[PCI_SUBORDINATE_BUS]; } static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num) { PCIBus *sec; if (!bus) { return NULL; } if (pci_bus_num(bus) == bus_num) { return bus; } /* Consider all bus numbers in range for the host pci bridge. */ if (!pci_bus_is_root(bus) && !pci_secondary_bus_in_range(bus->parent_dev, bus_num)) { return NULL; } /* try child bus */ for (; bus; bus = sec) { QLIST_FOREACH(sec, &bus->child, sibling) { assert(!pci_bus_is_root(sec)); if (sec->parent_dev->config[PCI_SECONDARY_BUS] == bus_num) { return sec; } if (pci_secondary_bus_in_range(sec->parent_dev, bus_num)) { break; } } } return NULL; } PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn) { bus = pci_find_bus_nr(bus, bus_num); if (!bus) return NULL; return bus->devices[devfn]; } static int pci_qdev_init(DeviceState *qdev) { PCIDevice *pci_dev = (PCIDevice *)qdev; PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev); PCIBus *bus; int rc; bool is_default_rom; /* initialize cap_present for pci_is_express() and pci_config_size() */ if (pc->is_express) { pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS; } bus = PCI_BUS(qdev_get_parent_bus(qdev)); pci_dev = do_pci_register_device(pci_dev, bus, object_get_typename(OBJECT(qdev)), pci_dev->devfn); if (pci_dev == NULL) return -1; if (qdev->hotplugged && pc->no_hotplug) { qerror_report(QERR_DEVICE_NO_HOTPLUG, object_get_typename(OBJECT(pci_dev))); do_pci_unregister_device(pci_dev); return -1; } if (pc->init) { rc = pc->init(pci_dev); if (rc != 0) { do_pci_unregister_device(pci_dev); return rc; } } /* rom loading */ is_default_rom = false; if (pci_dev->romfile == NULL && pc->romfile != NULL) { pci_dev->romfile = g_strdup(pc->romfile); is_default_rom = true; } pci_add_option_rom(pci_dev, is_default_rom); if (bus->hotplug) { /* Let buses differentiate between hotplug and when device is * enabled during qemu machine creation. */ rc = bus->hotplug(bus->hotplug_qdev, pci_dev, qdev->hotplugged ? PCI_HOTPLUG_ENABLED: PCI_COLDPLUG_ENABLED); if (rc != 0) { int r = pci_unregister_device(&pci_dev->qdev); assert(!r); return rc; } } return 0; } static int pci_unplug_device(DeviceState *qdev) { PCIDevice *dev = PCI_DEVICE(qdev); PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev); if (pc->no_hotplug) { qerror_report(QERR_DEVICE_NO_HOTPLUG, object_get_typename(OBJECT(dev))); return -1; } return dev->bus->hotplug(dev->bus->hotplug_qdev, dev, PCI_HOTPLUG_DISABLED); } PCIDevice *pci_create_multifunction(PCIBus *bus, int devfn, bool multifunction, const char *name) { DeviceState *dev; dev = qdev_create(&bus->qbus, name); qdev_prop_set_int32(dev, "addr", devfn); qdev_prop_set_bit(dev, "multifunction", multifunction); return PCI_DEVICE(dev); } PCIDevice *pci_create_simple_multifunction(PCIBus *bus, int devfn, bool multifunction, const char *name) { PCIDevice *dev = pci_create_multifunction(bus, devfn, multifunction, name); qdev_init_nofail(&dev->qdev); return dev; } PCIDevice *pci_create(PCIBus *bus, int devfn, const char *name) { return pci_create_multifunction(bus, devfn, false, name); } PCIDevice *pci_create_simple(PCIBus *bus, int devfn, const char *name) { return pci_create_simple_multifunction(bus, devfn, false, name); } static uint8_t pci_find_space(PCIDevice *pdev, uint8_t size) { int offset = PCI_CONFIG_HEADER_SIZE; int i; for (i = PCI_CONFIG_HEADER_SIZE; i < PCI_CONFIG_SPACE_SIZE; ++i) { if (pdev->used[i]) offset = i + 1; else if (i - offset + 1 == size) return offset; } return 0; } static uint8_t pci_find_capability_list(PCIDevice *pdev, uint8_t cap_id, uint8_t *prev_p) { uint8_t next, prev; if (!(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST)) return 0; for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]); prev = next + PCI_CAP_LIST_NEXT) if (pdev->config[next + PCI_CAP_LIST_ID] == cap_id) break; if (prev_p) *prev_p = prev; return next; } static uint8_t pci_find_capability_at_offset(PCIDevice *pdev, uint8_t offset) { uint8_t next, prev, found = 0; if (!(pdev->used[offset])) { return 0; } assert(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST); for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]); prev = next + PCI_CAP_LIST_NEXT) { if (next <= offset && next > found) { found = next; } } return found; } /* Patch the PCI vendor and device ids in a PCI rom image if necessary. This is needed for an option rom which is used for more than one device. */ static void pci_patch_ids(PCIDevice *pdev, uint8_t *ptr, int size) { uint16_t vendor_id; uint16_t device_id; uint16_t rom_vendor_id; uint16_t rom_device_id; uint16_t rom_magic; uint16_t pcir_offset; uint8_t checksum; /* Words in rom data are little endian (like in PCI configuration), so they can be read / written with pci_get_word / pci_set_word. */ /* Only a valid rom will be patched. */ rom_magic = pci_get_word(ptr); if (rom_magic != 0xaa55) { PCI_DPRINTF("Bad ROM magic %04x\n", rom_magic); return; } pcir_offset = pci_get_word(ptr + 0x18); if (pcir_offset + 8 >= size || memcmp(ptr + pcir_offset, "PCIR", 4)) { PCI_DPRINTF("Bad PCIR offset 0x%x or signature\n", pcir_offset); return; } vendor_id = pci_get_word(pdev->config + PCI_VENDOR_ID); device_id = pci_get_word(pdev->config + PCI_DEVICE_ID); rom_vendor_id = pci_get_word(ptr + pcir_offset + 4); rom_device_id = pci_get_word(ptr + pcir_offset + 6); PCI_DPRINTF("%s: ROM id %04x%04x / PCI id %04x%04x\n", pdev->romfile, vendor_id, device_id, rom_vendor_id, rom_device_id); checksum = ptr[6]; if (vendor_id != rom_vendor_id) { /* Patch vendor id and checksum (at offset 6 for etherboot roms). */ checksum += (uint8_t)rom_vendor_id + (uint8_t)(rom_vendor_id >> 8); checksum -= (uint8_t)vendor_id + (uint8_t)(vendor_id >> 8); PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum); ptr[6] = checksum; pci_set_word(ptr + pcir_offset + 4, vendor_id); } if (device_id != rom_device_id) { /* Patch device id and checksum (at offset 6 for etherboot roms). */ checksum += (uint8_t)rom_device_id + (uint8_t)(rom_device_id >> 8); checksum -= (uint8_t)device_id + (uint8_t)(device_id >> 8); PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum); ptr[6] = checksum; pci_set_word(ptr + pcir_offset + 6, device_id); } } /* Add an option rom for the device */ static int pci_add_option_rom(PCIDevice *pdev, bool is_default_rom) { int size; char *path; void *ptr; char name[32]; const VMStateDescription *vmsd; if (!pdev->romfile) return 0; if (strlen(pdev->romfile) == 0) return 0; if (!pdev->rom_bar) { /* * Load rom via fw_cfg instead of creating a rom bar, * for 0.11 compatibility. */ int class = pci_get_word(pdev->config + PCI_CLASS_DEVICE); if (class == 0x0300) { rom_add_vga(pdev->romfile); } else { rom_add_option(pdev->romfile, -1); } return 0; } path = qemu_find_file(QEMU_FILE_TYPE_BIOS, pdev->romfile); if (path == NULL) { path = g_strdup(pdev->romfile); } size = get_image_size(path); if (size < 0) { error_report("%s: failed to find romfile \"%s\"", __func__, pdev->romfile); g_free(path); return -1; } else if (size == 0) { error_report("%s: ignoring empty romfile \"%s\"", __func__, pdev->romfile); g_free(path); return -1; } if (size & (size - 1)) { size = 1 << qemu_fls(size); } vmsd = qdev_get_vmsd(DEVICE(pdev)); if (vmsd) { snprintf(name, sizeof(name), "%s.rom", vmsd->name); } else { snprintf(name, sizeof(name), "%s.rom", object_get_typename(OBJECT(pdev))); } pdev->has_rom = true; memory_region_init_ram(&pdev->rom, OBJECT(pdev), name, size); vmstate_register_ram(&pdev->rom, &pdev->qdev); ptr = memory_region_get_ram_ptr(&pdev->rom); load_image(path, ptr); g_free(path); if (is_default_rom) { /* Only the default rom images will be patched (if needed). */ pci_patch_ids(pdev, ptr, size); } pci_register_bar(pdev, PCI_ROM_SLOT, 0, &pdev->rom); return 0; } static void pci_del_option_rom(PCIDevice *pdev) { if (!pdev->has_rom) return; vmstate_unregister_ram(&pdev->rom, &pdev->qdev); memory_region_destroy(&pdev->rom); pdev->has_rom = false; } /* * if !offset * Reserve space and add capability to the linked list in pci config space * * if offset = 0, * Find and reserve space and add capability to the linked list * in pci config space */ int pci_add_capability(PCIDevice *pdev, uint8_t cap_id, uint8_t offset, uint8_t size) { uint8_t *config; int i, overlapping_cap; if (!offset) { offset = pci_find_space(pdev, size); if (!offset) { return -ENOSPC; } } else { /* Verify that capabilities don't overlap. Note: device assignment * depends on this check to verify that the device is not broken. * Should never trigger for emulated devices, but it's helpful * for debugging these. */ for (i = offset; i < offset + size; i++) { overlapping_cap = pci_find_capability_at_offset(pdev, i); if (overlapping_cap) { fprintf(stderr, "ERROR: %s:%02x:%02x.%x " "Attempt to add PCI capability %x at offset " "%x overlaps existing capability %x at offset %x\n", pci_root_bus_path(pdev), pci_bus_num(pdev->bus), PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), cap_id, offset, overlapping_cap, i); return -EINVAL; } } } config = pdev->config + offset; config[PCI_CAP_LIST_ID] = cap_id; config[PCI_CAP_LIST_NEXT] = pdev->config[PCI_CAPABILITY_LIST]; pdev->config[PCI_CAPABILITY_LIST] = offset; pdev->config[PCI_STATUS] |= PCI_STATUS_CAP_LIST; memset(pdev->used + offset, 0xFF, QEMU_ALIGN_UP(size, 4)); /* Make capability read-only by default */ memset(pdev->wmask + offset, 0, size); /* Check capability by default */ memset(pdev->cmask + offset, 0xFF, size); return offset; } /* Unlink capability from the pci config space. */ void pci_del_capability(PCIDevice *pdev, uint8_t cap_id, uint8_t size) { uint8_t prev, offset = pci_find_capability_list(pdev, cap_id, &prev); if (!offset) return; pdev->config[prev] = pdev->config[offset + PCI_CAP_LIST_NEXT]; /* Make capability writable again */ memset(pdev->wmask + offset, 0xff, size); memset(pdev->w1cmask + offset, 0, size); /* Clear cmask as device-specific registers can't be checked */ memset(pdev->cmask + offset, 0, size); memset(pdev->used + offset, 0, QEMU_ALIGN_UP(size, 4)); if (!pdev->config[PCI_CAPABILITY_LIST]) pdev->config[PCI_STATUS] &= ~PCI_STATUS_CAP_LIST; } uint8_t pci_find_capability(PCIDevice *pdev, uint8_t cap_id) { return pci_find_capability_list(pdev, cap_id, NULL); } static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent) { PCIDevice *d = (PCIDevice *)dev; const pci_class_desc *desc; char ctxt[64]; PCIIORegion *r; int i, class; class = pci_get_word(d->config + PCI_CLASS_DEVICE); desc = pci_class_descriptions; while (desc->desc && class != desc->class) desc++; if (desc->desc) { snprintf(ctxt, sizeof(ctxt), "%s", desc->desc); } else { snprintf(ctxt, sizeof(ctxt), "Class %04x", class); } monitor_printf(mon, "%*sclass %s, addr %02x:%02x.%x, " "pci id %04x:%04x (sub %04x:%04x)\n", indent, "", ctxt, pci_bus_num(d->bus), PCI_SLOT(d->devfn), PCI_FUNC(d->devfn), pci_get_word(d->config + PCI_VENDOR_ID), pci_get_word(d->config + PCI_DEVICE_ID), pci_get_word(d->config + PCI_SUBSYSTEM_VENDOR_ID), pci_get_word(d->config + PCI_SUBSYSTEM_ID)); for (i = 0; i < PCI_NUM_REGIONS; i++) { r = &d->io_regions[i]; if (!r->size) continue; monitor_printf(mon, "%*sbar %d: %s at 0x%"FMT_PCIBUS " [0x%"FMT_PCIBUS"]\n", indent, "", i, r->type & PCI_BASE_ADDRESS_SPACE_IO ? "i/o" : "mem", r->addr, r->addr + r->size - 1); } } static char *pci_dev_fw_name(DeviceState *dev, char *buf, int len) { PCIDevice *d = (PCIDevice *)dev; const char *name = NULL; const pci_class_desc *desc = pci_class_descriptions; int class = pci_get_word(d->config + PCI_CLASS_DEVICE); while (desc->desc && (class & ~desc->fw_ign_bits) != (desc->class & ~desc->fw_ign_bits)) { desc++; } if (desc->desc) { name = desc->fw_name; } if (name) { pstrcpy(buf, len, name); } else { snprintf(buf, len, "pci%04x,%04x", pci_get_word(d->config + PCI_VENDOR_ID), pci_get_word(d->config + PCI_DEVICE_ID)); } return buf; } static char *pcibus_get_fw_dev_path(DeviceState *dev) { PCIDevice *d = (PCIDevice *)dev; char path[50], name[33]; int off; off = snprintf(path, sizeof(path), "%s@%x", pci_dev_fw_name(dev, name, sizeof name), PCI_SLOT(d->devfn)); if (PCI_FUNC(d->devfn)) snprintf(path + off, sizeof(path) + off, ",%x", PCI_FUNC(d->devfn)); return g_strdup(path); } static char *pcibus_get_dev_path(DeviceState *dev) { PCIDevice *d = container_of(dev, PCIDevice, qdev); PCIDevice *t; int slot_depth; /* Path format: Domain:00:Slot.Function:Slot.Function....:Slot.Function. * 00 is added here to make this format compatible with * domain:Bus:Slot.Func for systems without nested PCI bridges. * Slot.Function list specifies the slot and function numbers for all * devices on the path from root to the specific device. */ const char *root_bus_path; int root_bus_len; char slot[] = ":SS.F"; int slot_len = sizeof slot - 1 /* For '\0' */; int path_len; char *path, *p; int s; root_bus_path = pci_root_bus_path(d); root_bus_len = strlen(root_bus_path); /* Calculate # of slots on path between device and root. */; slot_depth = 0; for (t = d; t; t = t->bus->parent_dev) { ++slot_depth; } path_len = root_bus_len + slot_len * slot_depth; /* Allocate memory, fill in the terminating null byte. */ path = g_malloc(path_len + 1 /* For '\0' */); path[path_len] = '\0'; memcpy(path, root_bus_path, root_bus_len); /* Fill in slot numbers. We walk up from device to root, so need to print * them in the reverse order, last to first. */ p = path + path_len; for (t = d; t; t = t->bus->parent_dev) { p -= slot_len; s = snprintf(slot, sizeof slot, ":%02x.%x", PCI_SLOT(t->devfn), PCI_FUNC(t->devfn)); assert(s == slot_len); memcpy(p, slot, slot_len); } return path; } static int pci_qdev_find_recursive(PCIBus *bus, const char *id, PCIDevice **pdev) { DeviceState *qdev = qdev_find_recursive(&bus->qbus, id); if (!qdev) { return -ENODEV; } /* roughly check if given qdev is pci device */ if (object_dynamic_cast(OBJECT(qdev), TYPE_PCI_DEVICE)) { *pdev = PCI_DEVICE(qdev); return 0; } return -EINVAL; } int pci_qdev_find_device(const char *id, PCIDevice **pdev) { PCIHostState *host_bridge; int rc = -ENODEV; QLIST_FOREACH(host_bridge, &pci_host_bridges, next) { int tmp = pci_qdev_find_recursive(host_bridge->bus, id, pdev); if (!tmp) { rc = 0; break; } if (tmp != -ENODEV) { rc = tmp; } } return rc; } MemoryRegion *pci_address_space(PCIDevice *dev) { return dev->bus->address_space_mem; } MemoryRegion *pci_address_space_io(PCIDevice *dev) { return dev->bus->address_space_io; } static void pci_device_class_init(ObjectClass *klass, void *data) { DeviceClass *k = DEVICE_CLASS(klass); k->init = pci_qdev_init; k->unplug = pci_unplug_device; k->exit = pci_unregister_device; k->bus_type = TYPE_PCI_BUS; k->props = pci_props; } void pci_setup_iommu(PCIBus *bus, PCIIOMMUFunc fn, void *opaque) { bus->iommu_fn = fn; bus->iommu_opaque = opaque; } static const TypeInfo pci_device_type_info = { .name = TYPE_PCI_DEVICE, .parent = TYPE_DEVICE, .instance_size = sizeof(PCIDevice), .abstract = true, .class_size = sizeof(PCIDeviceClass), .class_init = pci_device_class_init, }; static void pci_register_types(void) { type_register_static(&pci_bus_info); type_register_static(&pcie_bus_info); type_register_static(&pci_device_type_info); } type_init(pci_register_types)