Re: [Qemu-devel] [PATCH v3 2/2] 40p: add fixed IRQ routing for LSI SCSI device

["Philippe Mathieu-Daudé" <f4bug@amsat.org>]

On 9/10/18 10:46 PM, Mark Cave-Ayland wrote:
> Whilst the PReP specification describes how all PCI IRQs are routed via IRQ
> 15 on the interrupt controller, the real 40p machine has a routing quirk in
> that the LSI SCSI device is routed directly to IRQ 13.
> 
> Enable the external IRQ for the LSI SCSI device by wiring up the IRQ with
> qdev to the relevant interrupt controller gpio.
> 
> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

> ---
>  hw/ppc/prep.c | 11 ++++++-----
>  1 file changed, 6 insertions(+), 5 deletions(-)
> 
> diff --git a/hw/ppc/prep.c b/hw/ppc/prep.c
> index 615865e46c..94fc36b7ef 100644
> --- a/hw/ppc/prep.c
> +++ b/hw/ppc/prep.c
> @@ -621,7 +621,7 @@ static void ibm_40p_init(MachineState *machine)
>      CPUPPCState *env = NULL;
>      uint16_t cmos_checksum;
>      PowerPCCPU *cpu;
> -    DeviceState *dev;
> +    DeviceState *dev, *i82378_dev;
>      SysBusDevice *pcihost, *s;
>      Nvram *m48t59 = NULL;
>      PCIBus *pci_bus;
> @@ -666,11 +666,11 @@ static void ibm_40p_init(MachineState *machine)
>      }
>  
>      /* PCI -> ISA bridge */
> -    dev = DEVICE(pci_create_simple(pci_bus, PCI_DEVFN(11, 0), "i82378"));
> -    qdev_connect_gpio_out(dev, 0,
> +    i82378_dev = DEVICE(pci_create_simple(pci_bus, PCI_DEVFN(11, 0), "i82378"));
> +    qdev_connect_gpio_out(i82378_dev, 0,
>                            cpu->env.irq_inputs[PPC6xx_INPUT_INT]);
> -    sysbus_connect_irq(pcihost, 0, qdev_get_gpio_in(dev, 15));
> -    isa_bus = ISA_BUS(qdev_get_child_bus(dev, "isa.0"));
> +    sysbus_connect_irq(pcihost, 0, qdev_get_gpio_in(i82378_dev, 15));
> +    isa_bus = ISA_BUS(qdev_get_child_bus(i82378_dev, "isa.0"));
>  
>      /* Memory controller */
>      dev = DEVICE(isa_create(isa_bus, "rs6000-mc"));
> @@ -703,6 +703,7 @@ static void ibm_40p_init(MachineState *machine)
>          dev = DEVICE(pci_create_simple(pci_bus, PCI_DEVFN(1, 0),
>                                         "lsi53c810"));
>          lsi53c8xx_handle_legacy_cmdline(dev);
> +        qdev_connect_gpio_out(dev, 0, qdev_get_gpio_in(i82378_dev, 13));
>  
>          /* XXX: s3-trio at PCI_DEVFN(2, 0) */
>          pci_vga_init(pci_bus);
>