On 1/5/22 22:23, Daniel Henrique Barboza wrote:
> The XSCOM address space of the stack must be populated after the
> initialization of its associated PHB4 is completed. At this moment this
> is always true because stk_realize() will always succeeds the realize of
> stack->phb, but that will not be the case with user creatable pnv-phb4
> devices.
>
> Create a helper that can be used later on during pnv-phb4 realize() to
> initialize the xscom address space of its stack.
I think this patch prepares ground for user-created devices and should come
earlier in the series.
> Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Thanks,
C.
> ---
> hw/pci-host/pnv_phb4.c | 26 ++++++++++++++++++++++++++
> hw/pci-host/pnv_phb4_pec.c | 19 +------------------
> include/hw/pci-host/pnv_phb4.h | 1 +
> 3 files changed, 28 insertions(+), 18 deletions(-)
>
> diff --git a/hw/pci-host/pnv_phb4.c b/hw/pci-host/pnv_phb4.c
> index 9e670e41d2..430a5c10f4 100644
> --- a/hw/pci-host/pnv_phb4.c
> +++ b/hw/pci-host/pnv_phb4.c
> @@ -1158,6 +1158,32 @@ static AddressSpace *pnv_phb4_dma_iommu(PCIBus *bus, void *opaque, int devfn)
> return &ds->dma_as;
> }
>
> +/*
> + * Init the xscom address space of the stack. This must be
> + * called after the associated stack->phb is defined.
> + */
> +void pnv_pec_init_stack_xscom(PnvPhb4PecStack *stack)
> +{
> + PnvPhb4PecState *pec = stack->pec;
> + PnvPhb4PecClass *pecc = PNV_PHB4_PEC_GET_CLASS(pec);
> + PnvChip *chip = pec->chip;
> + uint32_t pec_nest_base = pecc->xscom_nest_base(pec);
> + uint32_t pec_pci_base = pecc->xscom_pci_base(pec);
> +
> +
> + /* Populate the XSCOM address space. */
> + pnv_xscom_add_subregion(chip,
> + pec_nest_base + 0x40 * (stack->stack_no + 1),
> + &stack->nest_regs_mr);
> + pnv_xscom_add_subregion(chip,
> + pec_pci_base + 0x40 * (stack->stack_no + 1),
> + &stack->pci_regs_mr);
> + pnv_xscom_add_subregion(chip,
> + pec_pci_base + PNV9_XSCOM_PEC_PCI_STK0 +
> + 0x40 * stack->stack_no,
> + &stack->phb_regs_mr);
> +}
> +
> /*
> * Return the index/phb-id of a PHB4 that belongs to a
> * pec->stacks[stack_index] stack.
> diff --git a/hw/pci-host/pnv_phb4_pec.c b/hw/pci-host/pnv_phb4_pec.c
> index 638691783b..41c79d24c4 100644
> --- a/hw/pci-host/pnv_phb4_pec.c
> +++ b/hw/pci-host/pnv_phb4_pec.c
> @@ -556,10 +556,6 @@ static void pnv_pec_stk_realize(DeviceState *dev, Error **errp)
> {
> PnvPhb4PecStack *stack = PNV_PHB4_PEC_STACK(dev);
> PnvPhb4PecState *pec = stack->pec;
> - PnvPhb4PecClass *pecc = PNV_PHB4_PEC_GET_CLASS(pec);
> - PnvChip *chip = pec->chip;
> - uint32_t pec_nest_base;
> - uint32_t pec_pci_base;
> char name[64];
>
> assert(pec);
> @@ -583,20 +579,7 @@ static void pnv_pec_stk_realize(DeviceState *dev, Error **errp)
> return;
> }
>
> - pec_nest_base = pecc->xscom_nest_base(pec);
> - pec_pci_base = pecc->xscom_pci_base(pec);
> -
> - /* Populate the XSCOM address space. */
> - pnv_xscom_add_subregion(chip,
> - pec_nest_base + 0x40 * (stack->stack_no + 1),
> - &stack->nest_regs_mr);
> - pnv_xscom_add_subregion(chip,
> - pec_pci_base + 0x40 * (stack->stack_no + 1),
> - &stack->pci_regs_mr);
> - pnv_xscom_add_subregion(chip,
> - pec_pci_base + PNV9_XSCOM_PEC_PCI_STK0 +
> - 0x40 * stack->stack_no,
> - &stack->phb_regs_mr);
> + pnv_pec_init_stack_xscom(stack);
> }
>
> static Property pnv_pec_stk_properties[] = {
> diff --git a/include/hw/pci-host/pnv_phb4.h b/include/hw/pci-host/pnv_phb4.h
> index 2fb5e119c4..610580a88f 100644
> --- a/include/hw/pci-host/pnv_phb4.h
> +++ b/include/hw/pci-host/pnv_phb4.h
> @@ -132,6 +132,7 @@ struct PnvPHB4 {
>
> void pnv_phb4_pic_print_info(PnvPHB4 *phb, Monitor *mon);
> void pnv_phb4_update_regions(PnvPhb4PecStack *stack);
> +void pnv_pec_init_stack_xscom(PnvPhb4PecStack *stack);
> void pnv_phb4_set_stack_phb_props(PnvPhb4PecStack *stack, PnvPHB4 *phb);
> int pnv_phb4_pec_get_phb_id(PnvPhb4PecState *pec, int stack_index);
> extern const MemoryRegionOps pnv_phb4_xscom_ops;
>