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

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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: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2014-02-05 16:36:51 +01:00 • committed by Michael S. Tsirkin
parent 5d268704d7
commit a66e657e18
3 changed files with 53 additions and 25 deletions
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65
hw/pci/pcie.c
View file

@ -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)