Commit a66e657e authored by Igor Mammedov's avatar Igor Mammedov Committed by Michael S. Tsirkin

pci/pcie: convert PCIE hotplug to use hotplug-handler API

Split pcie_cap_slot_hotplug() into hotplug/unplug callbacks
and register them as "hotplug-handler" interface implementation of
PCIE_SLOT device.

Replace pci_bus_hotplug() wiring with setting link on PCI BUS
"hotplug-handler" property to PCI_BRIDGE_DEV device.
Signed-off-by: 's avatarIgor Mammedov <imammedo@redhat.com>
Reviewed-by: 's avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: 's avatarMichael S. Tsirkin <mst@redhat.com>
parent 5d268704
......@@ -26,6 +26,7 @@
#include "hw/pci/pci_bus.h"
#include "hw/pci/pcie_regs.h"
#include "qemu/range.h"
#include "qapi/qmp/qerror.h"
//#define DEBUG_PCIE
#ifdef DEBUG_PCIE
......@@ -216,28 +217,20 @@ static void pcie_cap_slot_event(PCIDevice *dev, PCIExpressHotPlugEvent event)
hotplug_event_notify(dev);
}
static int pcie_cap_slot_hotplug(DeviceState *qdev,
PCIDevice *pci_dev, PCIHotplugState state)
static void pcie_cap_slot_hotplug_common(PCIDevice *hotplug_dev,
DeviceState *dev,
uint8_t **exp_cap, Error **errp)
{
PCIDevice *d = PCI_DEVICE(qdev);
uint8_t *exp_cap = d->config + d->exp.exp_cap;
uint16_t sltsta = pci_get_word(exp_cap + PCI_EXP_SLTSTA);
/* 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) {
pci_word_test_and_set_mask(exp_cap + PCI_EXP_SLTSTA,
PCI_EXP_SLTSTA_PDS);
return 0;
}
PCIDevice *pci_dev = PCI_DEVICE(dev);
*exp_cap = hotplug_dev->config + hotplug_dev->exp.exp_cap;
uint16_t sltsta = pci_get_word(*exp_cap + PCI_EXP_SLTSTA);
PCIE_DEV_PRINTF(pci_dev, "hotplug state: %d\n", state);
if (sltsta & PCI_EXP_SLTSTA_EIS) {
/* the slot is electromechanically locked.
* This error is propagated up to qdev and then to HMP/QMP.
*/
return -EBUSY;
error_setg_errno(errp, -EBUSY, "slot is electromechanically locked");
}
/* TODO: multifunction hot-plug.
......@@ -245,18 +238,40 @@ static int pcie_cap_slot_hotplug(DeviceState *qdev,
* hot plugged/unplugged.
*/
assert(PCI_FUNC(pci_dev->devfn) == 0);
}
if (state == PCI_HOTPLUG_ENABLED) {
void pcie_cap_slot_hotplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
Error **errp)
{
uint8_t *exp_cap;
pcie_cap_slot_hotplug_common(PCI_DEVICE(hotplug_dev), dev, &exp_cap, errp);
/* 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 (!dev->hotplugged) {
pci_word_test_and_set_mask(exp_cap + PCI_EXP_SLTSTA,
PCI_EXP_SLTSTA_PDS);
pcie_cap_slot_event(d, PCI_EXP_HP_EV_PDC);
} else {
object_unparent(OBJECT(pci_dev));
pci_word_test_and_clear_mask(exp_cap + PCI_EXP_SLTSTA,
PCI_EXP_SLTSTA_PDS);
pcie_cap_slot_event(d, PCI_EXP_HP_EV_PDC);
return;
}
return 0;
pci_word_test_and_set_mask(exp_cap + PCI_EXP_SLTSTA,
PCI_EXP_SLTSTA_PDS);
pcie_cap_slot_event(PCI_DEVICE(hotplug_dev), PCI_EXP_HP_EV_PDC);
}
void pcie_cap_slot_hot_unplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
Error **errp)
{
uint8_t *exp_cap;
pcie_cap_slot_hotplug_common(PCI_DEVICE(hotplug_dev), dev, &exp_cap, errp);
object_unparent(OBJECT(dev));
pci_word_test_and_clear_mask(exp_cap + PCI_EXP_SLTSTA,
PCI_EXP_SLTSTA_PDS);
pcie_cap_slot_event(PCI_DEVICE(hotplug_dev), PCI_EXP_HP_EV_PDC);
}
/* pci express slot for pci express root/downstream port
......@@ -305,8 +320,8 @@ void pcie_cap_slot_init(PCIDevice *dev, uint16_t slot)
dev->exp.hpev_notified = false;
pci_bus_hotplug(pci_bridge_get_sec_bus(PCI_BRIDGE(dev)),
pcie_cap_slot_hotplug, &dev->qdev);
qbus_set_hotplug_handler(BUS(pci_bridge_get_sec_bus(PCI_BRIDGE(dev))),
DEVICE(dev), NULL);
}
void pcie_cap_slot_reset(PCIDevice *dev)
......
......@@ -19,6 +19,7 @@
*/
#include "hw/pci/pcie_port.h"
#include "hw/hotplug.h"
void pcie_port_init_reg(PCIDevice *d)
{
......@@ -149,8 +150,11 @@ static Property pcie_slot_props[] = {
static void pcie_slot_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
dc->props = pcie_slot_props;
hc->plug = pcie_cap_slot_hotplug_cb;
hc->unplug = pcie_cap_slot_hot_unplug_cb;
}
static const TypeInfo pcie_slot_type_info = {
......@@ -159,6 +163,10 @@ static const TypeInfo pcie_slot_type_info = {
.instance_size = sizeof(PCIESlot),
.abstract = true,
.class_init = pcie_slot_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_HOTPLUG_HANDLER },
{ }
}
};
static void pcie_port_register_types(void)
......
......@@ -25,6 +25,7 @@
#include "hw/pci/pci_regs.h"
#include "hw/pci/pcie_regs.h"
#include "hw/pci/pcie_aer.h"
#include "hw/hotplug.h"
typedef enum {
/* for attention and power indicator */
......@@ -122,4 +123,8 @@ extern const VMStateDescription vmstate_pcie_device;
.offset = vmstate_offset_value(_state, _field, PCIDevice), \
}
void pcie_cap_slot_hotplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
Error **errp);
void pcie_cap_slot_hot_unplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
Error **errp);
#endif /* QEMU_PCIE_H */
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