On Tue, Jun 10, 2014 at 09:56:34AM +0800, Wei Yang wrote:
>This patch implements the pcibios_sriov_resource_alignment() on powernv
>platform.
>
>Signed-off-by: Wei Yang <weiyang@xxxxxxxxxxxxxxxxxx>
>---
> arch/powerpc/include/asm/machdep.h | 1 +
> arch/powerpc/kernel/pci-common.c | 8 ++++++++
> arch/powerpc/platforms/powernv/pci-ioda.c | 17 +++++++++++++++++
> 3 files changed, 26 insertions(+)
>
>diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h
>index 2f2e770..3bbc55f 100644
>--- a/arch/powerpc/include/asm/machdep.h
>+++ b/arch/powerpc/include/asm/machdep.h
>@@ -242,6 +242,7 @@ struct machdep_calls {
> resource_size_t (*pcibios_window_alignment)(struct pci_bus *, unsigned long type);
> #ifdef CONFIG_PCI_IOV
> resource_size_t (*__pci_sriov_resource_size)(struct pci_dev *, int resno);
>+ resource_size_t (*__pci_sriov_resource_alignment)(struct pci_dev *, int resno, resource_size_t align);
> #endif /* CONFIG_PCI_IOV */
>
> /* Called to shutdown machine specific hardware not already controlled
>diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
>index c4e2e92..35345ac 100644
>--- a/arch/powerpc/kernel/pci-common.c
>+++ b/arch/powerpc/kernel/pci-common.c
>@@ -128,6 +128,14 @@ resource_size_t pcibios_sriov_resource_size(struct pci_dev *pdev, int resno)
>
> return 0;
> }
>+
>+resource_size_t pcibios_sriov_resource_alignment(struct pci_dev *pdev, int resno, resource_size_t align)
>+{
>+ if (ppc_md.__pci_sriov_resource_alignment)
>+ return ppc_md.__pci_sriov_resource_alignment(pdev, resno, align);
>+
>+ return 0;
>+}
> #endif /* CONFIG_PCI_IOV */
>
> static resource_size_t pcibios_io_size(const struct pci_controller *hose)
>diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
>index 7dfad6a..b0ac851 100644
>--- a/arch/powerpc/platforms/powernv/pci-ioda.c
>+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
>@@ -1573,6 +1573,22 @@ static resource_size_t __pnv_pci_sriov_resource_size(struct pci_dev *pdev, int r
>
> return size;
> }
>+
>+static resource_size_t __pnv_pci_sriov_resource_alignment(struct pci_dev *pdev, int resno,
>+ resource_size_t align)
The function could be "pcibios_sriov_resource_alignment()", but it's not a big deal.
If you prefer the original one, then keep it :)
>+{
>+ struct pci_dn *pdn = pci_get_pdn(pdev);
>+ resource_size_t iov_align;
>+
>+ iov_align = resource_size(&pdev->resource[resno]);
>+ if (iov_align)
>+ return iov_align;
>+
>+ if (pdn->vfs)
>+ return pdn->vfs * align;
>+
>+ return align;
>+}
> #endif /* CONFIG_PCI_IOV */
>
> /* Prevent enabling devices for which we couldn't properly
>@@ -1777,6 +1793,7 @@ void __init pnv_pci_init_ioda_phb(struct device_node *np,
> ppc_md.pcibios_window_alignment = pnv_pci_window_alignment;
> #ifdef CONFIG_PCI_IOV
> ppc_md.__pci_sriov_resource_size = __pnv_pci_sriov_resource_size;
>+ ppc_md.__pci_sriov_resource_alignment = __pnv_pci_sriov_resource_alignment;
> #endif /* CONFIG_PCI_IOV */
> pci_add_flags(PCI_REASSIGN_ALL_RSRC);
>
Thanks,
Gavin
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