Re: [Qemu-devel] [PATCH v2 6/8] ppc/pnv: populate device tree for IPMI BT devices

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

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On Mon, Apr 10, 2017 at 03:56:56PM +0200, Cédric Le Goater wrote:
> When an ipmi-bt device [1] is defined on the ISA bus, we need to
> populate the device tree with the object properties. Such devices are
> created with the command line options :
> 
>    -device ipmi-bmc-sim,id=bmc0 -device isa-ipmi-bt,bmc=bmc0,irq=10
> 
> [1] https://lists.gnu.org/archive/html/qemu-devel/2015-11/msg03168.html
> 
> Signed-off-by: Cédric Le Goater <clg@kaod.org>
> ---
> 
>  Changes sinve v1:
> 
>  - reworked the assignement of the ISA IO base in the 'reg' array
>    property
>  
>  hw/ppc/pnv.c | 35 +++++++++++++++++++++++++++++++++++
>  1 file changed, 35 insertions(+)
> 
> diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
> index 7f2f9897f146..ec5d62a479b3 100644
> --- a/hw/ppc/pnv.c
> +++ b/hw/ppc/pnv.c
> @@ -332,6 +332,39 @@ static void powernv_populate_serial(ISADevice *d, void *fdt, int lpc_off)
>      _FDT((fdt_setprop_string(fdt, node, "device_type", "serial")));
>  }
>  
> +static void powernv_populate_ipmi_bt(ISADevice *d, void *fdt, int lpc_off)
> +{
> +    const char compatible[] = "bt\0ipmi-bt";
> +    uint32_t io_base = 0x0;

Remove the initializer here.  It's always set below, and having the
initializer could suppress a useful warning if the code below was
rearranged.

> +    uint32_t io_regs[] = {
> +        cpu_to_be32(1),
> +        0, /* 'io_base' retrieved from the 'ioport' property of 'isa-ipmi-bt' */
> +        cpu_to_be32(3)
> +    };
> +    uint32_t irq;
> +    char *name;
> +    int node;
> +
> +    io_base = object_property_get_int(OBJECT(d), "ioport", &error_fatal);
> +    io_regs[1] = cpu_to_be32(io_base);
> +
> +    irq = object_property_get_int(OBJECT(d), "irq", &error_fatal);
> +
> +    name = g_strdup_printf("%s@i%x", qdev_fw_name(DEVICE(d)), io_base);
> +    node = fdt_add_subnode(fdt, lpc_off, name);
> +    _FDT(node);
> +    g_free(name);
> +
> +    fdt_setprop(fdt, node, "reg", io_regs, sizeof(io_regs));
> +    fdt_setprop(fdt, node, "compatible", compatible, sizeof(compatible));
> +
> +    /* Mark it as reserved to avoid Linux trying to claim it */
> +    _FDT((fdt_setprop_string(fdt, node, "status", "reserved")));
> +    _FDT((fdt_setprop_cell(fdt, node, "interrupts", irq)));
> +    _FDT((fdt_setprop_cell(fdt, node, "interrupt-parent",
> +                           fdt_get_phandle(fdt, lpc_off))));
> +}
> +
>  typedef struct ForeachPopulateArgs {
>      void *fdt;
>      int offset;
> @@ -346,6 +379,8 @@ static int powernv_populate_isa_device(DeviceState *dev, void *opaque)
>          powernv_populate_rtc(d, args->fdt, args->offset);
>      } else if (object_dynamic_cast(OBJECT(dev), TYPE_ISA_SERIAL)) {
>          powernv_populate_serial(d, args->fdt, args->offset);
> +    } else if (object_dynamic_cast(OBJECT(dev), "isa-ipmi-bt")) {
> +        powernv_populate_ipmi_bt(d, args->fdt, args->offset);
>      } else {
>          error_report("unknown isa device %s@i%x", qdev_fw_name(dev),
>                       d->ioport_id);

-- 
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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