Re: [PATCH v3 21/33] lance: replace PROP_PTR with PROP_LINK

["Marc-André Lureau" <marcandre.lureau@redhat.com>]

Hi


On Thu, Oct 24, 2019 at 1:01 AM Philippe Mathieu-Daudé
<philmd@redhat.com> wrote:
>
> On 10/23/19 7:31 PM, Marc-André Lureau wrote:
> > Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> > Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
> > ---
> >   hw/dma/sparc32_dma.c | 2 +-
> >   hw/net/lance.c       | 5 ++---
> >   hw/net/pcnet-pci.c   | 2 +-
> >   hw/net/pcnet.h       | 2 +-
> >   4 files changed, 5 insertions(+), 6 deletions(-)
> >
> > diff --git a/hw/dma/sparc32_dma.c b/hw/dma/sparc32_dma.c
> > index 0e5bbcdc7f..3e4da0c47f 100644
> > --- a/hw/dma/sparc32_dma.c
> > +++ b/hw/dma/sparc32_dma.c
> > @@ -346,7 +346,7 @@ static void sparc32_ledma_device_realize(DeviceState *dev, Error **errp)
> >       d = qdev_create(NULL, TYPE_LANCE);
> >       object_property_add_child(OBJECT(dev), "lance", OBJECT(d), errp);
> >       qdev_set_nic_properties(d, nd);
> > -    qdev_prop_set_ptr(d, "dma", dev);
> > +    object_property_set_link(OBJECT(d), OBJECT(dev), "dma", errp);
> >       qdev_init_nofail(d);
> >   }
> >
> > diff --git a/hw/net/lance.c b/hw/net/lance.c
> > index 6631e2a4e0..4d96299041 100644
> > --- a/hw/net/lance.c
> > +++ b/hw/net/lance.c
> > @@ -138,7 +138,8 @@ static void lance_instance_init(Object *obj)
> >   }
> >
> >   static Property lance_properties[] = {
> > -    DEFINE_PROP_PTR("dma", SysBusPCNetState, state.dma_opaque),
> > +    DEFINE_PROP_LINK("dma", SysBusPCNetState, state.dma_opaque,
> > +                     TYPE_DEVICE, DeviceState *),
> >       DEFINE_NIC_PROPERTIES(SysBusPCNetState, state.conf),
> >       DEFINE_PROP_END_OF_LIST(),
> >   };
> > @@ -153,8 +154,6 @@ static void lance_class_init(ObjectClass *klass, void *data)
> >       dc->reset = lance_reset;
> >       dc->vmsd = &vmstate_lance;
> >       dc->props = lance_properties;
> > -    /* Reason: pointer property "dma" */
> > -    dc->user_creatable = false;
>
> But we still can not start it with the -device option and set the dma,
> can we?

This is a sysbus device, so you can't. I'll add a commit comment.

In theory, link property allows you to pass a QOM path to reference a
QOM instance from -device.

>
> >   }
> >
> >   static const TypeInfo lance_info = {
> > diff --git a/hw/net/pcnet-pci.c b/hw/net/pcnet-pci.c
> > index 4723c30c79..d067d21e2c 100644
> > --- a/hw/net/pcnet-pci.c
> > +++ b/hw/net/pcnet-pci.c
> > @@ -231,7 +231,7 @@ static void pci_pcnet_realize(PCIDevice *pci_dev, Error **errp)
> >       s->irq = pci_allocate_irq(pci_dev);
> >       s->phys_mem_read = pci_physical_memory_read;
> >       s->phys_mem_write = pci_physical_memory_write;
> > -    s->dma_opaque = pci_dev;
> > +    s->dma_opaque = DEVICE(pci_dev);
> >
> >       pcnet_common_init(DEVICE(pci_dev), s, &net_pci_pcnet_info);
> >   }
> > diff --git a/hw/net/pcnet.h b/hw/net/pcnet.h
> > index 28d19a5c6f..f49b213c57 100644
> > --- a/hw/net/pcnet.h
> > +++ b/hw/net/pcnet.h
> > @@ -50,7 +50,7 @@ struct PCNetState_st {
> >                            uint8_t *buf, int len, int do_bswap);
> >       void (*phys_mem_write)(void *dma_opaque, hwaddr addr,
> >                             uint8_t *buf, int len, int do_bswap);
> > -    void *dma_opaque;
> > +    DeviceState *dma_opaque;
> >       int tx_busy;
> >       int looptest;
> >   };
> >