Re: [Qemu-devel] [PATCH 2/2] ppc-e500: implement PCI INTx routing

["Michael S. Tsirkin" <mst@redhat.com>]

On Thu, Nov 28, 2013 at 12:05:33PM +0530, Bharat Bhushan wrote:
> This patch adds pci pin to irq_num routing callback
> Without this patch we gets below warning
> 
> "
>   PCI: Bug - unimplemented PCI INTx routing (e500-pcihost)
>   qemu-system-ppc64: PCI: Bug - unimplemented PCI INTx routing (e500-pcihost)
> "
> 
> Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com>


Please tweak commit log to explain thereal motivation for the change
which is to use vfio on ppc.
Besides that

Acked-by: Michael S. Tsirkin <mst@redhat.com>


> ---
>  hw/pci-host/ppce500.c |   20 ++++++++++++++++++--
>  1 files changed, 18 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/pci-host/ppce500.c b/hw/pci-host/ppce500.c
> index 49bfcc6..3c4cf9e 100644
> --- a/hw/pci-host/ppce500.c
> +++ b/hw/pci-host/ppce500.c
> @@ -88,6 +88,7 @@ struct PPCE500PCIState {
>      struct pci_inbound pib[PPCE500_PCI_NR_PIBS];
>      uint32_t gasket_time;
>      qemu_irq irq[PCI_NUM_PINS];
> +    uint32_t irq_num[PCI_NUM_PINS];
>      uint32_t first_slot;
>      /* mmio maps */
>      MemoryRegion container;
> @@ -267,13 +268,26 @@ static int mpc85xx_pci_map_irq(PCIDevice *pci_dev, int pin)
>  
>  static void mpc85xx_pci_set_irq(void *opaque, int pin, int level)
>  {
> -    qemu_irq *pic = opaque;
> +    PPCE500PCIState *s = opaque;
> +    qemu_irq *pic = s->irq;;
>  
>      pci_debug("%s: PCI irq %d, level:%d\n", __func__, pin , level);
>  
>      qemu_set_irq(pic[pin], level);
>  }
>  
> +static PCIINTxRoute e500_route_intx_pin_to_irq(void *opaque, int pin)
> +{
> +    PCIINTxRoute route;
> +    PPCE500PCIState *s = opaque;
> +
> +    route.mode = PCI_INTX_ENABLED;
> +    route.irq = s->irq_num[pin];
> +
> +    pci_debug("%s: PCI irq-pin = %d, irq_num= %d\n", __func__, pin, route.irq);
> +    return route;
> +}
> +
>  static const VMStateDescription vmstate_pci_outbound = {
>      .name = "pci_outbound",
>      .version_id = 0,
> @@ -350,12 +364,13 @@ static int e500_pcihost_initfn(SysBusDevice *dev)
>  
>      for (i = 0; i < ARRAY_SIZE(s->irq); i++) {
>          sysbus_init_irq(dev, &s->irq[i]);
> +        s->irq_num[i] = i + 1;
>      }
>  
>      memory_region_init(&s->pio, OBJECT(s), "pci-pio", PCIE500_PCI_IOLEN);
>  
>      b = pci_register_bus(DEVICE(dev), NULL, mpc85xx_pci_set_irq,
> -                         mpc85xx_pci_map_irq, s->irq, address_space_mem,
> +                         mpc85xx_pci_map_irq, s, address_space_mem,
>                           &s->pio, PCI_DEVFN(s->first_slot, 0), 4, TYPE_PCI_BUS);
>      h->bus = b;
>  
> @@ -373,6 +388,7 @@ static int e500_pcihost_initfn(SysBusDevice *dev)
>      memory_region_add_subregion(&s->container, PCIE500_REG_BASE, &s->iomem);
>      sysbus_init_mmio(dev, &s->container);
>      sysbus_init_mmio(dev, &s->pio);
> +    pci_bus_set_route_irq_fn(b, e500_route_intx_pin_to_irq);
>  
>      return 0;
>  }
> -- 
> 1.7.0.4
> 
>