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[Qemu-devel] Re: [PATCH v2 5/5] pci_bridge: introduce pci bridge library
From: |
Isaku Yamahata |
Subject: |
[Qemu-devel] Re: [PATCH v2 5/5] pci_bridge: introduce pci bridge library. |
Date: |
Mon, 12 Jul 2010 22:28:24 +0900 |
User-agent: |
Mutt/1.5.19 (2009-01-05) |
On Mon, Jul 12, 2010 at 03:10:00PM +0300, Michael S. Tsirkin wrote:
> On Mon, Jul 12, 2010 at 07:36:44PM +0900, Isaku Yamahata wrote:
> > diff --git a/hw/pci_bridge.h b/hw/pci_bridge.h
> > index ddb2c82..4697c7a 100644
> > --- a/hw/pci_bridge.h
> > +++ b/hw/pci_bridge.h
> > @@ -29,13 +29,27 @@
> > #include "pci.h"
> >
> > PCIDevice *pci_bridge_get_device(PCIBus *bus);
> > +PCIBus *pci_bridge_get_sec_bus(PCIBridge *br);
> >
> > -pcibus_t pci_bridge_get_base(PCIDevice *bridge, uint8_t type);
> > -pcibus_t pci_bridge_get_limit(PCIDevice *bridge, uint8_t type);
> > +pcibus_t pci_bridge_get_base(const PCIDevice *bridge, uint8_t type);
> > +pcibus_t pci_bridge_get_limit(const PCIDevice *bridge, uint8_t type);
> >
> > -PCIBus *pci_bridge_init(PCIBus *bus, int devfn, bool multifunction,
> > - uint16_t vid, uint16_t did,
> > - pci_map_irq_fn map_irq, const char *name);
> > +void pci_bridge_write_config(PCIDevice *d,
> > + uint32_t address, uint32_t val, int len);
> > +void pci_bridge_reset_reg(PCIDevice *dev);
> > +void pci_bridge_reset(DeviceState *qdev);
> > +
> > +int pci_bridge_initfn(PCIDevice *pci_dev);
> > +int pci_bridge_exitfn(PCIDevice *pci_dev);
> > +
> > +void pci_bridge_qdev_register(PCIDeviceInfo *info);
> > +
> > +PCIBridge *pci_bridge_create(PCIBus *bus, int devfn, bool multifunction,
> > + pci_map_irq_fn map_irq,
> > + const char *name, const char *bus_name);
> > +PCIBridge *pci_bridge_create_simple(PCIBus *bus, int devfn, bool
> > multifunction,
> > + pci_map_irq_fn map_irq,
> > + const char *name, const char
> > *bus_name);
>
> The APIs leave much to be desired. _simple and regular are same? What does
> _register do?
>
> We really should just use qdev: Can't we use pci_qdev_register_many and
> pci_create to create the bridge? Long term, all pci_create variants
> should go and get replaced with qdev_create.
If struct PCIBridge is exported, those three can be eliminated.
I think it is okay to export struct PCIBridge, but it would not
be a good idea to export PCIBus which is embedded in PCIBridge::sec_bus.
So how should we go?
- export both PCIBus and PCIBridge.
- make PCIBridge::sec_bus pointer, and export PCIBridge.
And kill register, create, create_simple.
v1 patch. Although you rejected it, I suppose you didn't see
this issue.
- introduce wrapper functions to convert types.
This patch.
- better alternatives?
--
yamahata
- [Qemu-devel] [PATCH v2 0/5] pci: split out bridge code into pci_bridge and make it library, Isaku Yamahata, 2010/07/12
- [Qemu-devel] [PATCH v2 3/5] pci_bridge: rename PCIBridge::bus -> PCIBridge::sec_bus., Isaku Yamahata, 2010/07/12
- [Qemu-devel] [PATCH v2 1/5] pci: move out pci internal structures, PCIBus, PCIBridge, and pci_bus_info., Isaku Yamahata, 2010/07/12
- [Qemu-devel] [PATCH v2 4/5] pci_bridge: clean up: remove pci_{register, unregister}_secondary_bus(), Isaku Yamahata, 2010/07/12
- [Qemu-devel] [PATCH v2 5/5] pci_bridge: introduce pci bridge library., Isaku Yamahata, 2010/07/12
- [Qemu-devel] [PATCH v2 2/5] pci/bridge: split out pci bridge code into pci_bridge.c from pci.c, Isaku Yamahata, 2010/07/12
- [Qemu-devel] Re: [PATCH v2 0/5] pci: split out bridge code into pci_bridge and make it library, Michael S. Tsirkin, 2010/07/12