* GNU GPL, version 2 or (at your option) any later version.
*/
+#include "qemu/osdep.h"
#include "hw/acpi/pcihp.h"
#include "hw/hw.h"
#include "hw/i386/pc.h"
#include "hw/pci/pci.h"
+#include "hw/pci/pci_bridge.h"
#include "hw/acpi/acpi.h"
#include "sysemu/sysemu.h"
-#include "qemu/range.h"
-#include "exec/ioport.h"
#include "exec/address-spaces.h"
#include "hw/pci/pci_bus.h"
+#include "qapi/error.h"
#include "qom/qom-qobject.h"
-#include "qapi/qmp/qint.h"
+#include "trace.h"
-//#define DEBUG
-
-#ifdef DEBUG
-# define ACPI_PCIHP_DPRINTF(format, ...) printf(format, ## __VA_ARGS__)
-#else
-# 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_PCIHP_ADDR 0xae00
+#define ACPI_PCIHP_SIZE 0x0014
+#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;
static int acpi_pcihp_get_bsel(PCIBus *bus)
{
- QObject *o = object_property_get_qobject(OBJECT(bus),
- ACPI_PCIHP_PROP_BSEL, NULL);
- int64_t bsel = -1;
- if (o) {
- bsel = qint_get_int(qobject_to_qint(o));
- }
- if (bsel < 0) {
+ Error *local_err = NULL;
+ uint64_t bsel = object_property_get_uint(OBJECT(bus), ACPI_PCIHP_PROP_BSEL,
+ &local_err);
+
+ if (local_err || bsel >= ACPI_PCIHP_MAX_HOTPLUG_BUS) {
+ if (local_err) {
+ error_free(local_err);
+ }
return -1;
+ } else {
+ return bsel;
+ }
+}
+
+/* Assign BSEL property to all buses. In the future, this can be changed
+ * to only assign to buses that support hotplug.
+ */
+static void *acpi_set_bsel(PCIBus *bus, void *opaque)
+{
+ unsigned *bsel_alloc = opaque;
+ unsigned *bus_bsel;
+
+ if (qbus_is_hotpluggable(BUS(bus))) {
+ bus_bsel = g_malloc(sizeof *bus_bsel);
+
+ *bus_bsel = (*bsel_alloc)++;
+ object_property_add_uint32_ptr(OBJECT(bus), ACPI_PCIHP_PROP_BSEL,
+ bus_bsel, &error_abort);
+ }
+
+ return bsel_alloc;
+}
+
+static void acpi_set_pci_info(void)
+{
+ static bool bsel_is_set;
+ PCIBus *bus;
+ unsigned bsel_alloc = ACPI_PCIHP_BSEL_DEFAULT;
+
+ if (bsel_is_set) {
+ return;
+ }
+ bsel_is_set = true;
+
+ bus = find_i440fx(); /* TODO: Q35 support */
+ if (bus) {
+ /* Scan all PCI buses. Set property to enable acpi based hotplug. */
+ pci_for_each_bus_depth_first(bus, acpi_set_bsel, NULL, &bsel_alloc);
}
- return bsel;
}
static void acpi_pcihp_test_hotplug_bus(PCIBus *bus, void *opaque)
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)
{
+ HotplugHandler *hotplug_ctrl;
BusChild *kid, *next;
- int slot = ffs(slots) - 1;
- bool slot_free = true;
+ int slot = ctz32(slots);
PCIBus *bus = acpi_pcihp_find_hotplug_bus(s, bsel);
+ trace_acpi_pci_eject_slot(bsel, slot);
+
if (!bus) {
return;
}
/* 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)) {
+ hotplug_ctrl = qdev_get_hotplug_handler(qdev);
+ hotplug_handler_unplug(hotplug_ctrl, qdev, &error_abort);
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)
}
s->acpi_pcihp_pci_status[bsel].hotplug_enable = ~0;
- s->acpi_pcihp_pci_status[bsel].device_present = 0;
if (!bus) {
return;
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);
}
}
void acpi_pcihp_reset(AcpiPciHpState *s)
{
+ acpi_set_pci_info();
acpi_pcihp_update(s);
}
-static void enable_device(AcpiPciHpState *s, unsigned bsel, int slot)
+void acpi_pcihp_device_pre_plug_cb(HotplugHandler *hotplug_dev,
+ DeviceState *dev, Error **errp)
{
- 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);
+ /* Only hotplugged devices need the hotplug capability. */
+ if (dev->hotplugged &&
+ acpi_pcihp_get_bsel(pci_get_bus(PCI_DEVICE(dev))) < 0) {
+ error_setg(errp, "Unsupported bus. Bus doesn't have property '"
+ ACPI_PCIHP_PROP_BSEL "' set");
+ return;
+ }
}
-int acpi_pcihp_device_hotplug(AcpiPciHpState *s, PCIDevice *dev,
- PCIHotplugState state)
+void acpi_pcihp_device_plug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s,
+ DeviceState *dev, Error **errp)
{
- int slot = PCI_SLOT(dev->devfn);
- int bsel = acpi_pcihp_get_bsel(dev->bus);
- if (bsel < 0) {
- return -1;
- }
+ PCIDevice *pdev = PCI_DEVICE(dev);
+ int slot = PCI_SLOT(pdev->devfn);
+ int bsel;
/* 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) {
+ /*
+ * Overwrite the default hotplug handler with the ACPI PCI one
+ * for cold plugged bridges only.
+ */
+ if (!s->legacy_piix &&
+ object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) {
+ PCIBus *sec = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev));
+
+ qbus_set_hotplug_handler(BUS(sec), OBJECT(hotplug_dev),
+ &error_abort);
+ /* We don't have to overwrite any other hotplug handler yet */
+ assert(QLIST_EMPTY(&sec->child));
+ }
+
+ return;
}
- if (state == PCI_HOTPLUG_ENABLED) {
- enable_device(s, bsel, slot);
- } else {
- disable_device(s, bsel, slot);
+ bsel = acpi_pcihp_get_bsel(pci_get_bus(pdev));
+ g_assert(bsel >= 0);
+ s->acpi_pcihp_pci_status[bsel].up |= (1U << slot);
+ acpi_send_event(DEVICE(hotplug_dev), ACPI_PCI_HOTPLUG_STATUS);
+}
+
+void acpi_pcihp_device_unplug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s,
+ DeviceState *dev, Error **errp)
+{
+ trace_acpi_pci_unplug(PCI_SLOT(PCI_DEVICE(dev)->devfn),
+ acpi_pcihp_get_bsel(pci_get_bus(PCI_DEVICE(dev))));
+ object_property_set_bool(OBJECT(dev), false, "realized", NULL);
+}
+
+void acpi_pcihp_device_unplug_request_cb(HotplugHandler *hotplug_dev,
+ AcpiPciHpState *s, DeviceState *dev,
+ Error **errp)
+{
+ PCIDevice *pdev = PCI_DEVICE(dev);
+ int slot = PCI_SLOT(pdev->devfn);
+ int bsel = acpi_pcihp_get_bsel(pci_get_bus(pdev));
+
+ trace_acpi_pci_unplug_request(bsel, slot);
+
+ 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);
+ acpi_send_event(DEVICE(hotplug_dev), ACPI_PCI_HOTPLUG_STATUS);
}
static uint64_t pci_read(void *opaque, hwaddr addr, unsigned int size)
uint32_t val = 0;
int bsel = s->hotplug_select;
- if (bsel < 0 || bsel > ACPI_PCIHP_MAX_HOTPLUG_BUS) {
+ if (bsel < 0 || bsel >= ACPI_PCIHP_MAX_HOTPLUG_BUS) {
return 0;
}
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;
- ACPI_PCIHP_DPRINTF("pci_up_read %" PRIu32 "\n", val);
+ case PCI_UP_BASE:
+ val = s->acpi_pcihp_pci_status[bsel].up;
+ if (!s->legacy_piix) {
+ s->acpi_pcihp_pci_status[bsel].up = 0;
+ }
+ trace_acpi_pci_up_read(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);
+ trace_acpi_pci_down_read(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);
+ trace_acpi_pci_features_read(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);
+ trace_acpi_pci_rmv_read(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);
+ trace_acpi_pci_sel_read(val);
default:
break;
}
{
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;
}
acpi_pcihp_eject_slot(s, s->hotplug_select, data);
- ACPI_PCIHP_DPRINTF("pciej write %" HWADDR_PRIx " <== %" PRIu64 "\n",
- addr, data);
+ trace_acpi_pci_ej_write(addr, data);
break;
- case PCI_SEL_BASE - PCI_HOTPLUG_ADDR:
- s->hotplug_select = data;
- ACPI_PCIHP_DPRINTF("pcisel write %" HWADDR_PRIx " <== %" PRIu64 "\n",
- addr, data);
+ case PCI_SEL_BASE:
+ s->hotplug_select = s->legacy_piix ? ACPI_PCIHP_BSEL_DEFAULT : data;
+ trace_acpi_pci_sel_write(addr, data);
default:
break;
}
},
};
-void acpi_pcihp_init(AcpiPciHpState *s, PCIBus *root_bus,
- MemoryRegion *address_space_io)
+void acpi_pcihp_init(Object *owner, AcpiPciHpState *s, PCIBus *root_bus,
+ MemoryRegion *address_space_io, bool bridges_enabled)
{
+ s->io_len = ACPI_PCIHP_SIZE;
+ s->io_base = ACPI_PCIHP_ADDR;
+
s->root= root_bus;
- 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);
+ s->legacy_piix = !bridges_enabled;
+
+ memory_region_init_io(&s->io, owner, &acpi_pcihp_io_ops, s,
+ "acpi-pci-hotplug", s->io_len);
+ memory_region_add_subregion(address_space_io, s->io_base, &s->io);
+
+ object_property_add_uint16_ptr(owner, ACPI_PCIHP_IO_BASE_PROP, &s->io_base,
+ &error_abort);
+ object_property_add_uint16_ptr(owner, ACPI_PCIHP_IO_LEN_PROP, &s->io_len,
+ &error_abort);
}
const VMStateDescription vmstate_acpi_pcihp_pci_status = {
.name = "acpi_pcihp_pci_status",
.version_id = 1,
.minimum_version_id = 1,
- .minimum_version_id_old = 1,
- .fields = (VMStateField []) {
+ .fields = (VMStateField[]) {
VMSTATE_UINT32(up, AcpiPciHpPciStatus),
VMSTATE_UINT32(down, AcpiPciHpPciStatus),
VMSTATE_END_OF_LIST()
projects / qemu.git / blobdiff