Re: [Qemu-devel] [PATCH 2/4] PPC: Qdev'ify e500 pci

[Blue Swirl <blauwirbel@gmail.com>]

On Tue, Sep 7, 2010 at 11:53 AM, Alexander Graf <agraf@suse.de> wrote:
> The e500 PCI controller isn't qdev'ified yet. This leads to severe issues
> when running with -drive.
>
> To be able to use a virtio disk with an e500 VM, let's convert the PCI
> controller over to qdev.
>
> Signed-off-by: Alexander Graf <agraf@suse.de>
> ---
>  hw/ppce500_pci.c |  106 +++++++++++++++++++++++++++++++++++++-----------------
>  1 files changed, 73 insertions(+), 33 deletions(-)
>
> diff --git a/hw/ppce500_pci.c b/hw/ppce500_pci.c
> index 8ac99f2..3fa42d2 100644
> --- a/hw/ppce500_pci.c
> +++ b/hw/ppce500_pci.c
> @@ -73,11 +73,11 @@ struct pci_inbound {
>  };
>
>  struct PPCE500PCIState {
> +    PCIHostState pci_state;
>     struct pci_outbound pob[PPCE500_PCI_NR_POBS];
>     struct pci_inbound pib[PPCE500_PCI_NR_PIBS];
>     uint32_t gasket_time;
> -    PCIHostState pci_state;
> -    PCIDevice *pci_dev;
> +    uint64_t base_addr;
>  };
>
>  typedef struct PPCE500PCIState PPCE500PCIState;
> @@ -221,7 +221,7 @@ static void ppce500_pci_save(QEMUFile *f, void *opaque)
>     PPCE500PCIState *controller = opaque;
>     int i;
>
> -    pci_device_save(controller->pci_dev, f);
> +    /* pci_device_save(controller->pci_dev, f); */

Why, is loading/saving broken?

>
>     for (i = 0; i < PPCE500_PCI_NR_POBS; i++) {
>         qemu_put_be32s(f, &controller->pob[i].potar);
> @@ -247,7 +247,7 @@ static int ppce500_pci_load(QEMUFile *f, void *opaque, int version_id)
>     if (version_id != 1)
>         return -EINVAL;
>
> -    pci_device_load(controller->pci_dev, f);
> +    /* pci_device_load(controller->pci_dev, f); */
>
>     for (i = 0; i < PPCE500_PCI_NR_POBS; i++) {
>         qemu_get_be32s(f, &controller->pob[i].potar);
> @@ -269,55 +269,95 @@ static int ppce500_pci_load(QEMUFile *f, void *opaque, int version_id)
>
>  PCIBus *ppce500_pci_init(qemu_irq pci_irqs[4], target_phys_addr_t registers)
>  {
> -    PPCE500PCIState *controller;
> +    DeviceState *dev;
> +    PCIBus *b;
> +    PCIHostState *h;
> +    PPCE500PCIState *s;
>     PCIDevice *d;
> -    int index;
>     static int ppce500_pci_id;
>
> -    controller = qemu_mallocz(sizeof(PPCE500PCIState));
> +    dev = qdev_create(NULL, "e500-pcihost");
> +    h = FROM_SYSBUS(PCIHostState, sysbus_from_qdev(dev));
> +    s = DO_UPCAST(PPCE500PCIState, pci_state, h);
> +
> +    qdev_prop_set_uint64(dev, "base_addr", registers);

This property should not be needed. You should simply use
sysbus_mmio_map() here.  See for example grackle_pci.c.

> +    b = pci_register_bus(&s->pci_state.busdev.qdev, NULL, mpc85xx_pci_set_irq,
> +                         mpc85xx_pci_map_irq, pci_irqs, PCI_DEVFN(0x11, 0), 4);
> +
> +    s->pci_state.bus = b;
> +    qdev_init_nofail(dev);
> +    d = pci_create_simple(b, 0, "e500-host-bridge");
> +
> +    /* XXX load/save code not tested. */
> +    register_savevm(&d->qdev, "ppce500_pci", ppce500_pci_id++,
> +                    1, ppce500_pci_save, ppce500_pci_load, s);

It would be nice if you also converted the device to VMState and vmsd.
A reset function would be cool too, if it's needed after Anthony's
reset changes.

>
> -    controller->pci_state.bus = pci_register_bus(NULL, "pci",
> -                                                 mpc85xx_pci_set_irq,
> -                                                 mpc85xx_pci_map_irq,
> -                                                 pci_irqs, PCI_DEVFN(0x11, 0),
> -                                                 4);
> -    d = pci_register_device(controller->pci_state.bus,
> -                            "host bridge", sizeof(PCIDevice),
> -                            0, NULL, NULL);
> +    return b;
> +}
>
> -    pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_FREESCALE);
> -    pci_config_set_device_id(d->config, PCI_DEVICE_ID_MPC8533E);
> -    pci_config_set_class(d->config, PCI_CLASS_PROCESSOR_POWERPC);
> +static int e500_pcihost_initfn(SysBusDevice *dev)
> +{
> +    PCIHostState *h;
> +    PPCE500PCIState *s;
> +    target_phys_addr_t registers;
> +    int index;
>
> -    controller->pci_dev = d;
> +    h = FROM_SYSBUS(PCIHostState, sysbus_from_qdev(dev));
> +    s = DO_UPCAST(PPCE500PCIState, pci_state, h);
> +    registers = (target_phys_addr_t)s->base_addr;
>
>     /* CFGADDR */
> -    index = pci_host_conf_register_mmio(&controller->pci_state, 0);
> +    index = pci_host_conf_register_mmio(&s->pci_state, 0);
>     if (index < 0)
> -        goto free;
> +        return -1;
>     cpu_register_physical_memory(registers + PCIE500_CFGADDR, 4, index);

Instead of cpu_register_physical_memory(), you should use
sysbus_register_mmio().

>
>     /* CFGDATA */
> -    index = pci_host_data_register_mmio(&controller->pci_state, 0);
> +    index = pci_host_data_register_mmio(&s->pci_state, 0);
>     if (index < 0)
> -        goto free;
> +        return -1;
>     cpu_register_physical_memory(registers + PCIE500_CFGDATA, 4, index);
>
>     index = cpu_register_io_memory(e500_pci_reg_read,
> -                                   e500_pci_reg_write, controller);
> +                                   e500_pci_reg_write, s);
>     if (index < 0)
> -        goto free;
> +        return -1;
>     cpu_register_physical_memory(registers + PCIE500_REG_BASE,
>                                    PCIE500_REG_SIZE, index);
> +    return 0;
> +}
>
> -    /* XXX load/save code not tested. */
> -    register_savevm(&d->qdev, "ppce500_pci", ppce500_pci_id++,
> -                    1, ppce500_pci_save, ppce500_pci_load, controller);
> +static int e500_host_bridge_initfn(PCIDevice *dev)
> +{
> +    pci_config_set_vendor_id(dev->config, PCI_VENDOR_ID_FREESCALE);
> +    pci_config_set_device_id(dev->config, PCI_DEVICE_ID_MPC8533E);
> +    pci_config_set_class(dev->config, PCI_CLASS_PROCESSOR_POWERPC);
> +
> +    return 0;
> +}
> +
> +static PCIDeviceInfo e500_host_bridge_info = {
> +    .qdev.name    = "e500-host-bridge",
> +    .qdev.desc    = "Host bridge",
> +    .qdev.size    = sizeof(PCIDevice),
> +    .qdev.no_user = 1,
> +    .init         = e500_host_bridge_initfn,
> +};
>
> -    return controller->pci_state.bus;
> +static SysBusDeviceInfo e500_pcihost_info = {
> +    .init         = e500_pcihost_initfn,
> +    .qdev.name    = "e500-pcihost",
> +    .qdev.size    = sizeof(PPCE500PCIState),
> +    .qdev.no_user = 1,
> +    .qdev.props = (Property[]) {
> +        DEFINE_PROP_UINT64("base_addr", PPCE500PCIState, base_addr, 0),
> +        DEFINE_PROP_END_OF_LIST(),
> +    }
> +};
>
> -free:
> -    printf("%s error\n", __func__);
> -    qemu_free(controller);
> -    return NULL;
> +static void e500_pci_register(void)
> +{
> +    sysbus_register_withprop(&e500_pcihost_info);
> +    pci_qdev_register(&e500_host_bridge_info);
>  }
> +device_init(e500_pci_register);
> --
> 1.6.0.2
>
>
>