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pci_bridge: introduce pci bridge library.

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introduce pci bridge library.
convert apb bridge and dec p2p bridge to use new pci bridge library.
save/restore is supported as a side effect.
This is also preparation for pci express root/upstream/downstream port.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Isaku Yamahata 2010-07-13 13:01:42 +09:00 • committed by Michael S. Tsirkin
parent 51a92333f8
commit 68f799944b
6 changed files with 177 additions and 83 deletions
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45
hw/dec_pci.c
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@ -28,6 +28,7 @@
#include "pci.h"
#include "pci_host.h"
#include "pci_bridge.h"
#include "pci_internals.h"
/* debug DEC */
//#define DEBUG_DEC
@ -49,18 +50,43 @@ static int dec_map_irq(PCIDevice *pci_dev, int irq_num)
return irq_num;
}
static int dec_21154_initfn(PCIDevice *dev)
{
int rc;
rc = pci_bridge_initfn(dev);
if (rc < 0) {
return rc;
}
pci_config_set_vendor_id(dev->config, PCI_VENDOR_ID_DEC);
pci_config_set_device_id(dev->config, PCI_DEVICE_ID_DEC_21154);
return 0;
}
static PCIDeviceInfo dec_21154_pci_bridge_info = {
.qdev.name = "dec-21154-p2p-bridge",
.qdev.desc = "DEC 21154 PCI-PCI bridge",
.qdev.size = sizeof(PCIBridge),
.qdev.vmsd = &vmstate_pci_device,
.qdev.reset = pci_bridge_reset,
.init = dec_21154_initfn,
.exit = pci_bridge_exitfn,
.config_write = pci_bridge_write_config,
.is_bridge = 1,
};
PCIBus *pci_dec_21154_init(PCIBus *parent_bus, int devfn)
{
DeviceState *dev;
PCIBus *ret;
PCIDevice *dev;
PCIBridge *br;
dev = qdev_create(NULL, "dec-21154");
qdev_init_nofail(dev);
ret = pci_bridge_init(parent_bus, devfn, false,
PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_21154,
dec_map_irq, "DEC 21154 PCI-PCI bridge");
return ret;
dev = pci_create_multifunction(parent_bus, devfn, false,
"dec-21154-p2p-bridge");
br = DO_UPCAST(PCIBridge, dev, dev);
pci_bridge_map_irq(br, "DEC 21154 PCI-PCI bridge", dec_map_irq);
qdev_init_nofail(&dev->qdev);
return pci_bridge_get_sec_bus(br);
}
static int pci_dec_21154_init_device(SysBusDevice *dev)
@ -99,6 +125,7 @@ static void dec_register_devices(void)
sysbus_register_dev("dec-21154", sizeof(DECState),
pci_dec_21154_init_device);
pci_qdev_register(&dec_21154_pci_host_info);
pci_qdev_register(&dec_21154_pci_bridge_info);
}
device_init(dec_register_devices)