Re: [PATCH 1/5] hw/ppc/pnv: incorrect homer and occ common area size

[Balamuruhan S <bala24@linux.ibm.com>]

On Wed, Nov 20, 2019 at 08:13:50AM +0100, Cédric Le Goater wrote:
> On 19/11/2019 18:50, Balamuruhan S wrote:
> > Homer size is 4MB and OCC common area size is 8MB, but currently
> > it is assigned with bar mask value. Also pass on the occ sram
> > size 3 bits right shifted to initialize the size appropriately.
> > 
> > Signed-off-by: Cédric Le Goater <clg@kaod.org>
> > Signed-off-by: Balamuruhan S <bala24@linux.ibm.com>
> > ---
> >  hw/ppc/pnv_occ.c     | 2 +-
> >  include/hw/ppc/pnv.h | 8 ++++----
> >  2 files changed, 5 insertions(+), 5 deletions(-)
> > 
> > diff --git a/hw/ppc/pnv_occ.c b/hw/ppc/pnv_occ.c
> > index 785653bb67..05c51c9de0 100644
> > --- a/hw/ppc/pnv_occ.c
> > +++ b/hw/ppc/pnv_occ.c
> > @@ -276,7 +276,7 @@ static void pnv_occ_realize(DeviceState *dev, Error **errp)
> >  
> >      /* XScom region for OCC SRAM registers */
> >      pnv_xscom_region_init(&occ->sram_regs, OBJECT(dev), poc->sram_ops,
> > -                          occ, "occ-common-area", poc->sram_size);
> > +                          occ, "occ-common-area", poc->sram_size >> 3);
> 
> the OCC common area seems to be accessed through MMIO also. Not only XSCOM.
> 
> In skiboot  : 
> 
>     bool occ_sensors_init(void)
>     {
>         ...
> 	occ_sensor_base = chip->occ_common_base + OCC_SENSOR_DATA_BLOCK_OFFSET;
>         ...
>     }
> 
> OCC would need two regions. One for the XSCOM access and one for the MMIO.
> 
> >  }

Okay, I will follow it.

> >  
> >  static void pnv_occ_class_init(ObjectClass *klass, void *data)
> > diff --git a/include/hw/ppc/pnv.h b/include/hw/ppc/pnv.h
> > index 0b4c722e6b..e9ed8b928a 100644
> > --- a/include/hw/ppc/pnv.h
> > +++ b/include/hw/ppc/pnv.h
> > @@ -203,12 +203,12 @@ void pnv_bmc_powerdown(IPMIBmc *bmc);
> >  #define PNV_XSCOM_BASE(chip)                                            \
> >      (0x0003fc0000000000ull + ((uint64_t)(chip)->chip_id) * PNV_XSCOM_SIZE)
> >  
> > -#define PNV_OCC_COMMON_AREA_SIZE    0x0000000000700000ull
> > +#define PNV_OCC_COMMON_AREA_SIZE    0x0000000000800000ull
> 
> ok. These are the BAR sizes. Can we deduce the barmask from the size ? 

Correct! we can do that, will make the respective change.

> 
> 
> >  #define PNV_OCC_COMMON_AREA(chip)                                       \
> >      (0x7fff800000ull + ((uint64_t)PNV_CHIP_INDEX(chip) * \
> >                           PNV_OCC_COMMON_AREA_SIZE))
> >  
> > -#define PNV_HOMER_SIZE              0x0000000000300000ull
> > +#define PNV_HOMER_SIZE              0x0000000000400000ull
> >  #define PNV_HOMER_BASE(chip)                                            \
> >      (0x7ffd800000ull + ((uint64_t)PNV_CHIP_INDEX(chip)) * PNV_HOMER_SIZE)
> >  
> > @@ -271,12 +271,12 @@ void pnv_bmc_powerdown(IPMIBmc *bmc);
> >  #define PNV9_XSCOM_SIZE              0x0000000400000000ull
> >  #define PNV9_XSCOM_BASE(chip)        PNV9_CHIP_BASE(chip, 0x00603fc00000000ull)
> >  
> > -#define PNV9_OCC_COMMON_AREA_SIZE    0x0000000000700000ull
> > +#define PNV9_OCC_COMMON_AREA_SIZE    0x0000000000800000ull
> >  #define PNV9_OCC_COMMON_AREA(chip)                                      \
> >      (0x203fff800000ull + ((uint64_t)PNV_CHIP_INDEX(chip) * \
> >                             PNV9_OCC_COMMON_AREA_SIZE))
> >  
> > -#define PNV9_HOMER_SIZE              0x0000000000300000ull
> > +#define PNV9_HOMER_SIZE              0x0000000000400000ull
> >  #define PNV9_HOMER_BASE(chip)                                           \
> >      (0x203ffd800000ull + ((uint64_t)PNV_CHIP_INDEX(chip)) * PNV9_HOMER_SIZE)
> >  #endif /* PPC_PNV_H */
> > 
>