Re: [PATCH v2 2/3] grackle: use qdev gpios for PCI IRQs

[David Gibson <david@gibson.dropbear.id.au>]

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On Tue, Oct 13, 2020 at 12:49:21PM +0100, Mark Cave-Ayland wrote:
> Currently an object link property is used to pass a reference to the Heathrow
> PIC into the PCI host bridge so that grackle_init_irqs() can connect the PCI
> IRQs to the PIC itself.
> 
> This can be simplified by defining the PCI IRQs as qdev gpios and then wiring
> up the PCI IRQs to the PIC in the Old World machine init function.
> 
> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

Applied to ppc-for-5.2.

> ---
>  hw/pci-host/grackle.c | 19 ++-----------------
>  hw/ppc/mac_oldworld.c |  7 +++++--
>  2 files changed, 7 insertions(+), 19 deletions(-)
> 
> diff --git a/hw/pci-host/grackle.c b/hw/pci-host/grackle.c
> index 57c29b20af..b05facf463 100644
> --- a/hw/pci-host/grackle.c
> +++ b/hw/pci-host/grackle.c
> @@ -28,7 +28,6 @@
>  #include "hw/ppc/mac.h"
>  #include "hw/qdev-properties.h"
>  #include "hw/pci/pci.h"
> -#include "hw/intc/heathrow_pic.h"
>  #include "hw/irq.h"
>  #include "qapi/error.h"
>  #include "qemu/module.h"
> @@ -41,7 +40,6 @@ struct GrackleState {
>      PCIHostState parent_obj;
>  
>      uint32_t ofw_addr;
> -    HeathrowState *pic;
>      qemu_irq irqs[4];
>      MemoryRegion pci_mmio;
>      MemoryRegion pci_hole;
> @@ -62,15 +60,6 @@ static void pci_grackle_set_irq(void *opaque, int irq_num, int level)
>      qemu_set_irq(s->irqs[irq_num], level);
>  }
>  
> -static void grackle_init_irqs(GrackleState *s)
> -{
> -    int i;
> -
> -    for (i = 0; i < ARRAY_SIZE(s->irqs); i++) {
> -        s->irqs[i] = qdev_get_gpio_in(DEVICE(s->pic), 0x15 + i);
> -    }
> -}
> -
>  static void grackle_realize(DeviceState *dev, Error **errp)
>  {
>      GrackleState *s = GRACKLE_PCI_HOST_BRIDGE(dev);
> @@ -85,7 +74,6 @@ static void grackle_realize(DeviceState *dev, Error **errp)
>                                       0, 4, TYPE_PCI_BUS);
>  
>      pci_create_simple(phb->bus, 0, "grackle");
> -    grackle_init_irqs(s);
>  }
>  
>  static void grackle_init(Object *obj)
> @@ -106,15 +94,12 @@ static void grackle_init(Object *obj)
>      memory_region_init_io(&phb->data_mem, obj, &pci_host_data_le_ops,
>                            DEVICE(obj), "pci-data-idx", 0x1000);
>  
> -    object_property_add_link(obj, "pic", TYPE_HEATHROW,
> -                             (Object **) &s->pic,
> -                             qdev_prop_allow_set_link_before_realize,
> -                             0);
> -
>      sysbus_init_mmio(sbd, &phb->conf_mem);
>      sysbus_init_mmio(sbd, &phb->data_mem);
>      sysbus_init_mmio(sbd, &s->pci_hole);
>      sysbus_init_mmio(sbd, &s->pci_io);
> +
> +    qdev_init_gpio_out(DEVICE(obj), s->irqs, ARRAY_SIZE(s->irqs));
>  }
>  
>  static void grackle_pci_realize(PCIDevice *d, Error **errp)
> diff --git a/hw/ppc/mac_oldworld.c b/hw/ppc/mac_oldworld.c
> index d6a76d06dc..05e46ee6fe 100644
> --- a/hw/ppc/mac_oldworld.c
> +++ b/hw/ppc/mac_oldworld.c
> @@ -253,10 +253,9 @@ static void ppc_heathrow_init(MachineState *machine)
>      /* Grackle PCI host bridge */
>      dev = qdev_new(TYPE_GRACKLE_PCI_HOST_BRIDGE);
>      qdev_prop_set_uint32(dev, "ofw-addr", 0x80000000);
> -    object_property_set_link(OBJECT(dev), "pic", OBJECT(pic_dev),
> -                             &error_abort);
>      s = SYS_BUS_DEVICE(dev);
>      sysbus_realize_and_unref(s, &error_fatal);
> +
>      sysbus_mmio_map(s, 0, GRACKLE_BASE);
>      sysbus_mmio_map(s, 1, GRACKLE_BASE + 0x200000);
>      /* PCI hole */
> @@ -266,6 +265,10 @@ static void ppc_heathrow_init(MachineState *machine)
>      memory_region_add_subregion(get_system_memory(), 0xfe000000,
>                                  sysbus_mmio_get_region(s, 3));
>  
> +    for (i = 0; i < 4; i++) {
> +        qdev_connect_gpio_out(dev, i, qdev_get_gpio_in(pic_dev, 0x15 + i));
> +    }
> +
>      pci_bus = PCI_HOST_BRIDGE(dev)->bus;
>  
>      pci_vga_init(pci_bus);

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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