Re: [Qemu-devel] [PATCH v6 03/37] ppc/xive: introduce the XiveNotifier interface

[David Gibson]

On Thu, Dec 06, 2018 at 12:22:17AM +0100, Cédric Le Goater wrote:
> The XiveNotifier offers a simple interface, between the XiveSource
> object and the main interrupt controller of the machine. It will
> forward event notifications to the XIVE Interrupt Virtualization
> Routing Engine (IVRE).
> 
> Signed-off-by: Cédric Le Goater <address@hidden>
> ---
>  include/hw/ppc/xive.h | 23 +++++++++++++++++++++++
>  hw/intc/xive.c        | 25 +++++++++++++++++++++++++
>  2 files changed, 48 insertions(+)
> 
> diff --git a/include/hw/ppc/xive.h b/include/hw/ppc/xive.h
> index 7cebc32eba4c..6770cffec67d 100644
> --- a/include/hw/ppc/xive.h
> +++ b/include/hw/ppc/xive.h
> @@ -142,6 +142,27 @@
>  
>  #include "hw/qdev-core.h"
>  
> +/*
> + * XIVE Fabric (Interface between Source and Router)
> + */
> +
> +typedef struct XiveNotifier {
> +    Object parent;
> +} XiveNotifier;
> +
> +#define TYPE_XIVE_NOTIFIER "xive-fabric"

I'm applying this, but changing the string here from "xive-fabric" to
"xive-notifier".


> +#define XIVE_NOTIFIER(obj)                                     \
> +    OBJECT_CHECK(XiveNotifier, (obj), TYPE_XIVE_NOTIFIER)
> +#define XIVE_NOTIFIER_CLASS(klass)                                     \
> +    OBJECT_CLASS_CHECK(XiveNotifierClass, (klass), TYPE_XIVE_NOTIFIER)
> +#define XIVE_NOTIFIER_GET_CLASS(obj)                                   \
> +    OBJECT_GET_CLASS(XiveNotifierClass, (obj), TYPE_XIVE_NOTIFIER)
> +
> +typedef struct XiveNotifierClass {
> +    InterfaceClass parent;
> +    void (*notify)(XiveNotifier *xn, uint32_t lisn);
> +} XiveNotifierClass;
> +
>  /*
>   * XIVE Interrupt Source
>   */
> @@ -171,6 +192,8 @@ typedef struct XiveSource {
>      uint64_t        esb_flags;
>      uint32_t        esb_shift;
>      MemoryRegion    esb_mmio;
> +
> +    XiveNotifier    *xive;
>  } XiveSource;
>  
>  /*
> diff --git a/hw/intc/xive.c b/hw/intc/xive.c
> index 11c7aac962de..79238eb57fae 100644
> --- a/hw/intc/xive.c
> +++ b/hw/intc/xive.c
> @@ -155,7 +155,11 @@ static bool xive_source_esb_eoi(XiveSource *xsrc, 
> uint32_t srcno)
>   */
>  static void xive_source_notify(XiveSource *xsrc, int srcno)
>  {
> +    XiveNotifierClass *xnc = XIVE_NOTIFIER_GET_CLASS(xsrc->xive);
>  
> +    if (xnc->notify) {
> +        xnc->notify(xsrc->xive, srcno);
> +    }
>  }
>  
>  /*
> @@ -362,6 +366,17 @@ static void xive_source_reset(void *dev)
>  static void xive_source_realize(DeviceState *dev, Error **errp)
>  {
>      XiveSource *xsrc = XIVE_SOURCE(dev);
> +    Object *obj;
> +    Error *local_err = NULL;
> +
> +    obj = object_property_get_link(OBJECT(dev), "xive", &local_err);
> +    if (!obj) {
> +        error_propagate(errp, local_err);
> +        error_prepend(errp, "required link 'xive' not found: ");
> +        return;
> +    }
> +
> +    xsrc->xive = XIVE_NOTIFIER(obj);
>  
>      if (!xsrc->nr_irqs) {
>          error_setg(errp, "Number of interrupt needs to be greater than 0");
> @@ -428,9 +443,19 @@ static const TypeInfo xive_source_info = {
>      .class_init    = xive_source_class_init,
>  };
>  
> +/*
> + * XIVE Fabric
> + */
> +static const TypeInfo xive_fabric_info = {
> +    .name = TYPE_XIVE_NOTIFIER,
> +    .parent = TYPE_INTERFACE,
> +    .class_size = sizeof(XiveNotifierClass),
> +};
> +
>  static void xive_register_types(void)
>  {
>      type_register_static(&xive_source_info);
> +    type_register_static(&xive_fabric_info);
>  }
>  
>  type_init(xive_register_types)

-- 
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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