Re: [PATCH 6/9] ppc/pnv: Add a OCC model for POWER10

[Greg Kurz <groug@kaod.org>]

On Wed, 13 May 2020 17:11:06 +0200
Cédric Le Goater <clg@kaod.org> wrote:

> Needs some more refinements but this model does not do much anyhow.
> 
> Signed-off-by: Cédric Le Goater <clg@kaod.org>
> ---
>  include/hw/ppc/pnv.h       |  1 +
>  include/hw/ppc/pnv_occ.h   |  2 ++
>  include/hw/ppc/pnv_xscom.h |  3 +++
>  hw/ppc/pnv.c               | 14 ++++++++++++++
>  hw/ppc/pnv_occ.c           | 17 +++++++++++++++++
>  5 files changed, 37 insertions(+)
> 
> diff --git a/include/hw/ppc/pnv.h b/include/hw/ppc/pnv.h
> index f318bb10add4..3ff610a9c7b5 100644
> --- a/include/hw/ppc/pnv.h
> +++ b/include/hw/ppc/pnv.h
> @@ -122,6 +122,7 @@ typedef struct Pnv10Chip {
>      PnvXive2     xive;
>      Pnv9Psi      psi;
>      PnvLpcController lpc;
> +    PnvOCC       occ;
>  } Pnv10Chip;
>  
>  #define PNV10_PIR2FUSEDCORE(pir) (((pir) >> 3) & 0xf)
> diff --git a/include/hw/ppc/pnv_occ.h b/include/hw/ppc/pnv_occ.h
> index f8d3061419dc..57cb437c9ca1 100644
> --- a/include/hw/ppc/pnv_occ.h
> +++ b/include/hw/ppc/pnv_occ.h
> @@ -28,6 +28,8 @@
>  #define PNV8_OCC(obj) OBJECT_CHECK(PnvOCC, (obj), TYPE_PNV8_OCC)
>  #define TYPE_PNV9_OCC TYPE_PNV_OCC "-POWER9"
>  #define PNV9_OCC(obj) OBJECT_CHECK(PnvOCC, (obj), TYPE_PNV9_OCC)
> +#define TYPE_PNV10_OCC TYPE_PNV_OCC "-POWER10"
> +#define PNV10_OCC(obj) OBJECT_CHECK(PnvOCC, (obj), TYPE_PNV10_OCC)
>  
>  #define PNV_OCC_SENSOR_DATA_BLOCK_OFFSET 0x00580000
>  #define PNV_OCC_SENSOR_DATA_BLOCK_SIZE   0x00025800
> diff --git a/include/hw/ppc/pnv_xscom.h b/include/hw/ppc/pnv_xscom.h
> index 1211add3e79c..f26c5217764d 100644
> --- a/include/hw/ppc/pnv_xscom.h
> +++ b/include/hw/ppc/pnv_xscom.h
> @@ -133,6 +133,9 @@ typedef struct PnvXScomInterfaceClass {
>  #define PNV10_XSCOM_PSIHB_BASE     0x3011D00
>  #define PNV10_XSCOM_PSIHB_SIZE     0x100
>  
> +#define PNV10_XSCOM_OCC_BASE       PNV_XSCOM_OCC_BASE
> +#define PNV10_XSCOM_OCC_SIZE       0x8000
> +

I don't understand why you explicitly reuse the P8/P9 definition
for the base address and you open-code the size which is the
same as P9... 

>  #define PNV10_XSCOM_XIVE2_BASE     0x2010800
>  #define PNV10_XSCOM_XIVE2_SIZE     0x400
>  
> diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
> index 73c40ce3209f..9f1698a74467 100644
> --- a/hw/ppc/pnv.c
> +++ b/hw/ppc/pnv.c
> @@ -1617,6 +1617,8 @@ static void pnv_chip_power10_instance_init(Object *obj)
>                              TYPE_PNV10_PSI, &error_abort, NULL);
>      object_initialize_child(obj, "lpc",  &chip10->lpc, sizeof(chip10->lpc),
>                              TYPE_PNV10_LPC, &error_abort, NULL);
> +    object_initialize_child(obj, "occ",  &chip10->occ, sizeof(chip10->occ),
> +                            TYPE_PNV10_OCC, &error_abort, NULL);
>  }
>  
>  static void pnv_chip_power10_realize(DeviceState *dev, Error **errp)
> @@ -1690,6 +1692,18 @@ static void pnv_chip_power10_realize(DeviceState *dev, Error **errp)
>  
>      chip->dt_isa_nodename = g_strdup_printf("/lpcm-opb@%" PRIx64 "/lpc@0",
>                                              (uint64_t) PNV10_LPCM_BASE(chip));
> +
> +    /* Create the simplified OCC model */
> +    object_property_set_link(OBJECT(&chip10->occ), OBJECT(&chip10->psi), "psi",
> +                             &error_abort);
> +    object_property_set_bool(OBJECT(&chip10->occ), true, "realized",
> +                             &local_err);
> +    if (local_err) {
> +        error_propagate(errp, local_err);
> +        return;
> +    }
> +    pnv_xscom_add_subregion(chip, PNV10_XSCOM_OCC_BASE,
> +                            &chip10->occ.xscom_regs);
>  }
>  
>  static uint32_t pnv_chip_power10_xscom_pcba(PnvChip *chip, uint64_t addr)
> diff --git a/hw/ppc/pnv_occ.c b/hw/ppc/pnv_occ.c
> index 5a716c256edc..7a2aea8fb9d1 100644
> --- a/hw/ppc/pnv_occ.c
> +++ b/hw/ppc/pnv_occ.c
> @@ -249,6 +249,22 @@ static const TypeInfo pnv_occ_power9_type_info = {
>      .class_init    = pnv_occ_power9_class_init,
>  };
>  
> +static void pnv_occ_power10_class_init(ObjectClass *klass, void *data)
> +{
> +    PnvOCCClass *poc = PNV_OCC_CLASS(klass);
> +
> +    poc->xscom_size = PNV9_XSCOM_OCC_SIZE;

Shouldn't it be PNV10_XSCOM_OCC_SIZE since you define it in
include/hw/ppc/pnv_xscom.h above ?

> +    poc->xscom_ops = &pnv_occ_power9_xscom_ops;
> +    poc->psi_irq = PSIHB9_IRQ_OCC;

Using P9 bits in P10 code might be a little confusing for the
casual reader. A comment could be helpful until you come up
with the refinements mentioned in the changelog.

> +}
> +
> +static const TypeInfo pnv_occ_power10_type_info = {
> +    .name          = TYPE_PNV10_OCC,
> +    .parent        = TYPE_PNV_OCC,
> +    .instance_size = sizeof(PnvOCC),
> +    .class_init    = pnv_occ_power10_class_init,
> +};
> +
>  static void pnv_occ_realize(DeviceState *dev, Error **errp)
>  {
>      PnvOCC *occ = PNV_OCC(dev);
> @@ -297,6 +313,7 @@ static void pnv_occ_register_types(void)
>      type_register_static(&pnv_occ_type_info);
>      type_register_static(&pnv_occ_power8_type_info);
>      type_register_static(&pnv_occ_power9_type_info);
> +    type_register_static(&pnv_occ_power10_type_info);
>  }
>  
>  type_init(pnv_occ_register_types);