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

["Cédric Le Goater" <clg@kaod.org>]

On 5/20/20 4:22 PM, Greg Kurz wrote:
> 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... 

I will clean that up. 

>>  #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. 

The HW interface has not changed between P9 and P10. That's all.

C. 

> 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);
>