diff options
Diffstat (limited to 'hw/acpi/pcihp.c')
| -rw-r--r-- | hw/acpi/pcihp.c | 127 |
1 files changed, 71 insertions, 56 deletions
diff --git a/hw/acpi/pcihp.c b/hw/acpi/pcihp.c index 3fa3d7c290..f80c48008c 100644 --- a/hw/acpi/pcihp.c +++ b/hw/acpi/pcihp.c @@ -46,13 +46,15 @@ # define ACPI_PCIHP_DPRINTF(format, ...) do { } while (0) #endif -#define PCI_HOTPLUG_ADDR 0xae00 -#define PCI_HOTPLUG_SIZE 0x0014 -#define PCI_UP_BASE 0xae00 -#define PCI_DOWN_BASE 0xae04 -#define PCI_EJ_BASE 0xae08 -#define PCI_RMV_BASE 0xae0c -#define PCI_SEL_BASE 0xae10 +#define ACPI_PCI_HOTPLUG_STATUS 2 +#define ACPI_PCIHP_ADDR 0xae00 +#define ACPI_PCIHP_SIZE 0x0014 +#define ACPI_PCIHP_LEGACY_SIZE 0x000f +#define PCI_UP_BASE 0x0000 +#define PCI_DOWN_BASE 0x0004 +#define PCI_EJ_BASE 0x0008 +#define PCI_RMV_BASE 0x000c +#define PCI_SEL_BASE 0x0010 typedef struct AcpiPciHpFind { int bsel; @@ -104,19 +106,19 @@ static PCIBus *acpi_pcihp_find_hotplug_bus(AcpiPciHpState *s, int bsel) static bool acpi_pcihp_pc_no_hotplug(AcpiPciHpState *s, PCIDevice *dev) { PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev); + DeviceClass *dc = DEVICE_GET_CLASS(dev); /* * ACPI doesn't allow hotplug of bridge devices. Don't allow * hot-unplug of bridge devices unless they were added by hotplug * (and so, not described by acpi). */ - return (pc->is_bridge && !dev->qdev.hotplugged) || pc->no_hotplug; + return (pc->is_bridge && !dev->qdev.hotplugged) || !dc->hotpluggable; } static void acpi_pcihp_eject_slot(AcpiPciHpState *s, unsigned bsel, unsigned slots) { BusChild *kid, *next; int slot = ffs(slots) - 1; - bool slot_free = true; PCIBus *bus = acpi_pcihp_find_hotplug_bus(s, bsel); if (!bus) { @@ -125,21 +127,17 @@ static void acpi_pcihp_eject_slot(AcpiPciHpState *s, unsigned bsel, unsigned slo /* Mark request as complete */ s->acpi_pcihp_pci_status[bsel].down &= ~(1U << slot); + s->acpi_pcihp_pci_status[bsel].up &= ~(1U << slot); QTAILQ_FOREACH_SAFE(kid, &bus->qbus.children, sibling, next) { DeviceState *qdev = kid->child; PCIDevice *dev = PCI_DEVICE(qdev); if (PCI_SLOT(dev->devfn) == slot) { - if (acpi_pcihp_pc_no_hotplug(s, dev)) { - slot_free = false; - } else { + if (!acpi_pcihp_pc_no_hotplug(s, dev)) { object_unparent(OBJECT(qdev)); } } } - if (slot_free) { - s->acpi_pcihp_pci_status[bsel].device_present &= ~(1U << slot); - } } static void acpi_pcihp_update_hotplug_bus(AcpiPciHpState *s, int bsel) @@ -153,7 +151,6 @@ static void acpi_pcihp_update_hotplug_bus(AcpiPciHpState *s, int bsel) } s->acpi_pcihp_pci_status[bsel].hotplug_enable = ~0; - s->acpi_pcihp_pci_status[bsel].device_present = 0; if (!bus) { return; @@ -166,8 +163,6 @@ static void acpi_pcihp_update_hotplug_bus(AcpiPciHpState *s, int bsel) if (acpi_pcihp_pc_no_hotplug(s, pdev)) { s->acpi_pcihp_pci_status[bsel].hotplug_enable &= ~(1U << slot); } - - s->acpi_pcihp_pci_status[bsel].device_present |= (1U << slot); } } @@ -185,40 +180,47 @@ void acpi_pcihp_reset(AcpiPciHpState *s) acpi_pcihp_update(s); } -static void enable_device(AcpiPciHpState *s, unsigned bsel, int slot) -{ - s->acpi_pcihp_pci_status[bsel].device_present |= (1U << slot); -} - -static void disable_device(AcpiPciHpState *s, unsigned bsel, int slot) -{ - s->acpi_pcihp_pci_status[bsel].down |= (1U << slot); -} - -int acpi_pcihp_device_hotplug(AcpiPciHpState *s, PCIDevice *dev, - PCIHotplugState state) +void acpi_pcihp_device_plug_cb(ACPIREGS *ar, qemu_irq irq, AcpiPciHpState *s, + DeviceState *dev, Error **errp) { - int slot = PCI_SLOT(dev->devfn); - int bsel = acpi_pcihp_get_bsel(dev->bus); + PCIDevice *pdev = PCI_DEVICE(dev); + int slot = PCI_SLOT(pdev->devfn); + int bsel = acpi_pcihp_get_bsel(pdev->bus); if (bsel < 0) { - return -1; + error_setg(errp, "Unsupported bus. Bus doesn't have property '" + ACPI_PCIHP_PROP_BSEL "' set"); + return; } /* Don't send event when device is enabled during qemu machine creation: * it is present on boot, no hotplug event is necessary. We do send an * event when the device is disabled later. */ - if (state == PCI_COLDPLUG_ENABLED) { - s->acpi_pcihp_pci_status[bsel].device_present |= (1U << slot); - return 0; + if (!dev->hotplugged) { + return; } - if (state == PCI_HOTPLUG_ENABLED) { - enable_device(s, bsel, slot); - } else { - disable_device(s, bsel, slot); + s->acpi_pcihp_pci_status[bsel].up |= (1U << slot); + + ar->gpe.sts[0] |= ACPI_PCI_HOTPLUG_STATUS; + acpi_update_sci(ar, irq); +} + +void acpi_pcihp_device_unplug_cb(ACPIREGS *ar, qemu_irq irq, AcpiPciHpState *s, + DeviceState *dev, Error **errp) +{ + PCIDevice *pdev = PCI_DEVICE(dev); + int slot = PCI_SLOT(pdev->devfn); + int bsel = acpi_pcihp_get_bsel(pdev->bus); + if (bsel < 0) { + error_setg(errp, "Unsupported bus. Bus doesn't have property '" + ACPI_PCIHP_PROP_BSEL "' set"); + return; } - return 0; + s->acpi_pcihp_pci_status[bsel].down |= (1U << slot); + + ar->gpe.sts[0] |= ACPI_PCI_HOTPLUG_STATUS; + acpi_update_sci(ar, irq); } static uint64_t pci_read(void *opaque, hwaddr addr, unsigned int size) @@ -232,26 +234,26 @@ static uint64_t pci_read(void *opaque, hwaddr addr, unsigned int size) } switch (addr) { - case PCI_UP_BASE - PCI_HOTPLUG_ADDR: - /* Manufacture an "up" value to cause a device check on any hotplug - * slot with a device. Extra device checks are harmless. */ - val = s->acpi_pcihp_pci_status[bsel].device_present & - s->acpi_pcihp_pci_status[bsel].hotplug_enable; + case PCI_UP_BASE: + val = s->acpi_pcihp_pci_status[bsel].up; + if (!s->legacy_piix) { + s->acpi_pcihp_pci_status[bsel].up = 0; + } ACPI_PCIHP_DPRINTF("pci_up_read %" PRIu32 "\n", val); break; - case PCI_DOWN_BASE - PCI_HOTPLUG_ADDR: + case PCI_DOWN_BASE: val = s->acpi_pcihp_pci_status[bsel].down; ACPI_PCIHP_DPRINTF("pci_down_read %" PRIu32 "\n", val); break; - case PCI_EJ_BASE - PCI_HOTPLUG_ADDR: + case PCI_EJ_BASE: /* No feature defined yet */ ACPI_PCIHP_DPRINTF("pci_features_read %" PRIu32 "\n", val); break; - case PCI_RMV_BASE - PCI_HOTPLUG_ADDR: + case PCI_RMV_BASE: val = s->acpi_pcihp_pci_status[bsel].hotplug_enable; ACPI_PCIHP_DPRINTF("pci_rmv_read %" PRIu32 "\n", val); break; - case PCI_SEL_BASE - PCI_HOTPLUG_ADDR: + case PCI_SEL_BASE: val = s->hotplug_select; ACPI_PCIHP_DPRINTF("pci_sel_read %" PRIu32 "\n", val); default: @@ -266,7 +268,7 @@ static void pci_write(void *opaque, hwaddr addr, uint64_t data, { AcpiPciHpState *s = opaque; switch (addr) { - case PCI_EJ_BASE - PCI_HOTPLUG_ADDR: + case PCI_EJ_BASE: if (s->hotplug_select >= ACPI_PCIHP_MAX_HOTPLUG_BUS) { break; } @@ -274,7 +276,7 @@ static void pci_write(void *opaque, hwaddr addr, uint64_t data, ACPI_PCIHP_DPRINTF("pciej write %" HWADDR_PRIx " <== %" PRIu64 "\n", addr, data); break; - case PCI_SEL_BASE - PCI_HOTPLUG_ADDR: + case PCI_SEL_BASE: s->hotplug_select = data; ACPI_PCIHP_DPRINTF("pcisel write %" HWADDR_PRIx " <== %" PRIu64 "\n", addr, data); @@ -294,13 +296,26 @@ static const MemoryRegionOps acpi_pcihp_io_ops = { }; void acpi_pcihp_init(AcpiPciHpState *s, PCIBus *root_bus, - MemoryRegion *address_space_io) + MemoryRegion *address_space_io, bool bridges_enabled) { + uint16_t io_size = ACPI_PCIHP_SIZE; + s->root= root_bus; + s->legacy_piix = !bridges_enabled; + + if (s->legacy_piix) { + unsigned *bus_bsel = g_malloc(sizeof *bus_bsel); + + io_size = ACPI_PCIHP_LEGACY_SIZE; + + *bus_bsel = ACPI_PCIHP_BSEL_DEFAULT; + object_property_add_uint32_ptr(OBJECT(root_bus), ACPI_PCIHP_PROP_BSEL, + bus_bsel, NULL); + } + memory_region_init_io(&s->io, NULL, &acpi_pcihp_io_ops, s, - "acpi-pci-hotplug", - PCI_HOTPLUG_SIZE); - memory_region_add_subregion(address_space_io, PCI_HOTPLUG_ADDR, &s->io); + "acpi-pci-hotplug", io_size); + memory_region_add_subregion(address_space_io, ACPI_PCIHP_ADDR, &s->io); } const VMStateDescription vmstate_acpi_pcihp_pci_status = { |