Re: [PATCH 2/4] s390x/pci: don't use hard-coded dma range in reg_ioat

[Eric Farman]

On Thu, 2021-12-02 at 11:41 -0500, Matthew Rosato wrote:
> Instead use the values from clp info, they will either be the hard-
> coded
> values or what came from the host driver via vfio.
> 
> Fixes: 9670ee752727 ("s390x/pci: use a PCI Function structure")
> Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>

Reviewed-by: Eric Farman <farman@linux.ibm.com>

> ---
>  hw/s390x/s390-pci-inst.c | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c
> index 1c8ad91175..11b7f6bfa1 100644
> --- a/hw/s390x/s390-pci-inst.c
> +++ b/hw/s390x/s390-pci-inst.c
> @@ -916,9 +916,10 @@ int pci_dereg_irqs(S390PCIBusDevice *pbdev)
>      return 0;
>  }
>  
> -static int reg_ioat(CPUS390XState *env, S390PCIIOMMU *iommu, ZpciFib
> fib,
> +static int reg_ioat(CPUS390XState *env, S390PCIBusDevice *pbdev,
> ZpciFib fib,
>                      uintptr_t ra)
>  {
> +    S390PCIIOMMU *iommu = pbdev->iommu;
>      uint64_t pba = ldq_p(&fib.pba);
>      uint64_t pal = ldq_p(&fib.pal);
>      uint64_t g_iota = ldq_p(&fib.iota);
> @@ -927,7 +928,7 @@ static int reg_ioat(CPUS390XState *env,
> S390PCIIOMMU *iommu, ZpciFib fib,
>  
>      pba &= ~0xfff;
>      pal |= 0xfff;
> -    if (pba > pal || pba < ZPCI_SDMA_ADDR || pal > ZPCI_EDMA_ADDR) {
> +    if (pba > pal || pba < pbdev->zpci_fn.sdma || pal > pbdev-
> >zpci_fn.edma) {
>          s390_program_interrupt(env, PGM_OPERAND, ra);
>          return -EINVAL;
>      }
> @@ -1125,7 +1126,7 @@ int mpcifc_service_call(S390CPU *cpu, uint8_t
> r1, uint64_t fiba, uint8_t ar,
>          } else if (pbdev->iommu->enabled) {
>              cc = ZPCI_PCI_LS_ERR;
>              s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
> -        } else if (reg_ioat(env, pbdev->iommu, fib, ra)) {
> +        } else if (reg_ioat(env, pbdev, fib, ra)) {
>              cc = ZPCI_PCI_LS_ERR;
>              s390_set_status_code(env, r1, ZPCI_MOD_ST_INSUF_RES);
>          }
> @@ -1150,7 +1151,7 @@ int mpcifc_service_call(S390CPU *cpu, uint8_t
> r1, uint64_t fiba, uint8_t ar,
>              s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
>          } else {
>              pci_dereg_ioat(pbdev->iommu);
> -            if (reg_ioat(env, pbdev->iommu, fib, ra)) {
> +            if (reg_ioat(env, pbdev, fib, ra)) {
>                  cc = ZPCI_PCI_LS_ERR;
>                  s390_set_status_code(env, r1,
> ZPCI_MOD_ST_INSUF_RES);
>              }